1Mbed TLS ChangeLog (Sorted per branch, date) 2 3= Mbed TLS 3.4.0 branch released 2023-03-28 4 5Default behavior changes 6 * The default priority order of TLS 1.3 cipher suites has been modified to 7 follow the same rules as the TLS 1.2 cipher suites (see 8 ssl_ciphersuites.c). The preferred cipher suite is now 9 TLS_CHACHA20_POLY1305_SHA256. 10 11New deprecations 12 * mbedtls_x509write_crt_set_serial() is now being deprecated in favor of 13 mbedtls_x509write_crt_set_serial_raw(). The goal here is to remove any 14 direct dependency of X509 on BIGNUM_C. 15 * PSA to mbedtls error translation is now unified in psa_util.h, 16 deprecating mbedtls_md_error_from_psa. Each file that performs error 17 translation should define its own version of PSA_TO_MBEDTLS_ERR, 18 optionally providing file-specific error pairs. Please see psa_util.h for 19 more details. 20 21Features 22 * Added partial support for parsing the PKCS #7 Cryptographic Message 23 Syntax, as defined in RFC 2315. Currently, support is limited to the 24 following: 25 - Only the signed-data content type, version 1 is supported. 26 - Only DER encoding is supported. 27 - Only a single digest algorithm per message is supported. 28 - Certificates must be in X.509 format. A message must have either 0 29 or 1 certificates. 30 - There is no support for certificate revocation lists. 31 - The authenticated and unauthenticated attribute fields of SignerInfo 32 must be empty. 33 Many thanks to Daniel Axtens, Nayna Jain, and Nick Child from IBM for 34 contributing this feature, and to Demi-Marie Obenour for contributing 35 various improvements, tests and bug fixes. 36 * General performance improvements by accessing multiple bytes at a time. 37 Fixes #1666. 38 * Improvements to use of unaligned and byte-swapped memory, reducing code 39 size and improving performance (depending on compiler and target 40 architecture). 41 * Add support for reading points in compressed format 42 (MBEDTLS_ECP_PF_COMPRESSED) with mbedtls_ecp_point_read_binary() 43 (and callers) for Short Weierstrass curves with prime p where p = 3 mod 4 44 (all mbedtls MBEDTLS_ECP_DP_SECP* and MBEDTLS_ECP_DP_BP* curves 45 except MBEDTLS_ECP_DP_SECP224R1 and MBEDTLS_ECP_DP_SECP224K1) 46 * SHA224_C/SHA384_C are now independent from SHA384_C/SHA512_C respectively. 47 This helps in saving code size when some of the above hashes are not 48 required. 49 * Add parsing of V3 extensions (key usage, Netscape cert-type, 50 Subject Alternative Names) in x509 Certificate Sign Requests. 51 * Use HOSTCC (if it is set) when compiling C code during generation of the 52 configuration-independent files. This allows them to be generated when 53 CC is set for cross compilation. 54 * Add parsing of uniformResourceIdentifier subtype for subjectAltName 55 extension in x509 certificates. 56 * Add an interruptible version of sign and verify hash to the PSA interface, 57 backed by internal library support for ECDSA signing and verification. 58 * Add parsing of rfc822Name subtype for subjectAltName 59 extension in x509 certificates. 60 * The configuration macros MBEDTLS_PSA_CRYPTO_PLATFORM_FILE and 61 MBEDTLS_PSA_CRYPTO_STRUCT_FILE specify alternative locations for 62 the headers "psa/crypto_platform.h" and "psa/crypto_struct.h". 63 * When a PSA driver for ECDSA is present, it is now possible to disable 64 MBEDTLS_ECDSA_C in the build in order to save code size. For PK, X.509 65 and TLS to fully work, this requires MBEDTLS_USE_PSA_CRYPTO to be enabled. 66 Restartable/interruptible ECDSA operations in PK, X.509 and TLS are not 67 supported in those builds yet, as driver support for interruptible ECDSA 68 operations is not present yet. 69 * Add a driver dispatch layer for EC J-PAKE, enabling alternative 70 implementations of EC J-PAKE through the driver entry points. 71 * Add new API mbedtls_ssl_cache_remove for cache entry removal by 72 its session id. 73 * Add support to include the SubjectAltName extension to a CSR. 74 * Add support for AES with the Armv8-A Cryptographic Extension on 75 64-bit Arm. A new configuration option, MBEDTLS_AESCE_C, can 76 be used to enable this feature. Run-time detection is supported 77 under Linux only. 78 * When a PSA driver for EC J-PAKE is present, it is now possible to disable 79 MBEDTLS_ECJPAKE_C in the build in order to save code size. For the 80 corresponding TLS 1.2 key exchange to work, MBEDTLS_USE_PSA_CRYPTO needs 81 to be enabled. 82 * Add functions mbedtls_rsa_get_padding_mode() and mbedtls_rsa_get_md_alg() 83 to read non-public fields for padding mode and hash id from 84 an mbedtls_rsa_context, as requested in #6917. 85 * AES-NI is now supported with Visual Studio. 86 * AES-NI is now supported in 32-bit builds, or when MBEDTLS_HAVE_ASM 87 is disabled, when compiling with GCC or Clang or a compatible compiler 88 for a target CPU that supports the requisite instructions (for example 89 gcc -m32 -msse2 -maes -mpclmul). (Generic x86 builds with GCC-like 90 compilers still require MBEDTLS_HAVE_ASM and a 64-bit target.) 91 * It is now possible to use a PSA-held (opaque) password with the TLS 1.2 92 ECJPAKE key exchange, using the new API function 93 mbedtls_ssl_set_hs_ecjpake_password_opaque(). 94 95Security 96 * Use platform-provided secure zeroization function where possible, such as 97 explicit_bzero(). 98 * Zeroize SSL cache entries when they are freed. 99 * Fix a potential heap buffer overread in TLS 1.3 client-side when 100 MBEDTLS_DEBUG_C is enabled. This may result in an application crash. 101 * Add support for AES with the Armv8-A Cryptographic Extension on 64-bit 102 Arm, so that these systems are no longer vulnerable to timing side-channel 103 attacks. This is configured by MBEDTLS_AESCE_C, which is on by default. 104 Reported by Demi Marie Obenour. 105 * MBEDTLS_AESNI_C, which is enabled by default, was silently ignored on 106 builds that couldn't compile the GCC-style assembly implementation 107 (most notably builds with Visual Studio), leaving them vulnerable to 108 timing side-channel attacks. There is now an intrinsics-based AES-NI 109 implementation as a fallback for when the assembly one cannot be used. 110 111Bugfix 112 * Fix possible integer overflow in mbedtls_timing_hardclock(), which 113 could cause a crash in programs/test/benchmark. 114 * Fix IAR compiler warnings. Fixes #6924. 115 * Fix a bug in the build where directory names containing spaces were 116 causing generate_errors.pl to error out resulting in a build failure. 117 Fixes issue #6879. 118 * In TLS 1.3, when using a ticket for session resumption, tweak its age 119 calculation on the client side. It prevents a server with more accurate 120 ticket timestamps (typically timestamps in milliseconds) compared to the 121 Mbed TLS ticket timestamps (in seconds) to compute a ticket age smaller 122 than the age computed and transmitted by the client and thus potentially 123 reject the ticket. Fix #6623. 124 * Fix compile error where MBEDTLS_RSA_C and MBEDTLS_X509_CRT_WRITE_C are 125 defined, but MBEDTLS_PK_RSA_ALT_SUPPORT is not defined. Fixes #3174. 126 * List PSA_WANT_ALG_CCM_STAR_NO_TAG in psa/crypto_config.h so that it can 127 be toggled with config.py. 128 * The key derivation algorithm PSA_ALG_TLS12_ECJPAKE_TO_PMS cannot be 129 used on a shared secret from a key agreement since its input must be 130 an ECC public key. Reject this properly. 131 * mbedtls_x509write_crt_set_serial() now explicitly rejects serial numbers 132 whose binary representation is longer than 20 bytes. This was already 133 forbidden by the standard (RFC5280 - section 4.1.2.2) and now it's being 134 enforced also at code level. 135 * Fix potential undefined behavior in mbedtls_mpi_sub_abs(). Reported by 136 Pascal Cuoq using TrustInSoft Analyzer in #6701; observed independently by 137 Aaron Ucko under Valgrind. 138 * Fix behavior of certain sample programs which could, when run with no 139 arguments, access uninitialized memory in some cases. Fixes #6700 (which 140 was found by TrustInSoft Analyzer during REDOCS'22) and #1120. 141 * Fix parsing of X.509 SubjectAlternativeName extension. Previously, 142 malformed alternative name components were not caught during initial 143 certificate parsing, but only on subsequent calls to 144 mbedtls_x509_parse_subject_alt_name(). Fixes #2838. 145 * Make the fields of mbedtls_pk_rsassa_pss_options public. This makes it 146 possible to verify RSA PSS signatures with the pk module, which was 147 inadvertently broken since Mbed TLS 3.0. 148 * Fix bug in conversion from OID to string in 149 mbedtls_oid_get_numeric_string(). OIDs such as 2.40.0.25 are now printed 150 correctly. 151 * Reject OIDs with overlong-encoded subidentifiers when converting 152 them to a string. 153 * Reject OIDs with subidentifier values exceeding UINT_MAX. Such 154 subidentifiers can be valid, but Mbed TLS cannot currently handle them. 155 * Reject OIDs that have unterminated subidentifiers, or (equivalently) 156 have the most-significant bit set in their last byte. 157 * Silence warnings from clang -Wdocumentation about empty \retval 158 descriptions, which started appearing with Clang 15. Fixes #6960. 159 * Fix the handling of renegotiation attempts in TLS 1.3. They are now 160 systematically rejected. 161 * Fix an unused-variable warning in TLS 1.3-only builds if 162 MBEDTLS_SSL_RENEGOTIATION was enabled. Fixes #6200. 163 * Fix undefined behavior in mbedtls_ssl_read() and mbedtls_ssl_write() if 164 len argument is 0 and buffer is NULL. 165 * Allow setting user and peer identifiers for EC J-PAKE operation 166 instead of role in PAKE PSA Crypto API as described in the specification. 167 This is a partial fix that allows only "client" and "server" identifiers. 168 * Fix a compilation error when PSA Crypto is built with support for 169 TLS12_PRF but not TLS12_PSK_TO_MS. Reported by joerchan in #7125. 170 * In the TLS 1.3 server, select the preferred client cipher suite, not the 171 least preferred. The selection error was introduced in Mbed TLS 3.3.0. 172 * Fix TLS 1.3 session resumption when the established pre-shared key is 173 384 bits long. That is the length of pre-shared keys created under a 174 session where the cipher suite is TLS_AES_256_GCM_SHA384. 175 * Fix an issue when compiling with MBEDTLS_SHA512_USE_A64_CRYPTO_IF_PRESENT 176 enabled, which required specifying compiler flags enabling SHA3 Crypto 177 Extensions, where some compilers would emit EOR3 instructions in other 178 modules, which would then fail if run on a CPU without the SHA3 179 extensions. Fixes #5758. 180 181Changes 182 * Install the .cmake files into CMAKE_INSTALL_LIBDIR/cmake/MbedTLS, 183 typically /usr/lib/cmake/MbedTLS. 184 * Mixed-endian systems are explicitly not supported any more. 185 * When MBEDTLS_USE_PSA_CRYPTO and MBEDTLS_ECDSA_DETERMINISTIC are both 186 defined, mbedtls_pk_sign() now use deterministic ECDSA for ECDSA 187 signatures. This aligns the behaviour with MBEDTLS_USE_PSA_CRYPTO to 188 the behaviour without it, where deterministic ECDSA was already used. 189 * Visual Studio: Rename the directory containing Visual Studio files from 190 visualc/VS2010 to visualc/VS2013 as we do not support building with versions 191 older than 2013. Update the solution file to specify VS2013 as a minimum. 192 * programs/x509/cert_write: 193 - now it accepts the serial number in 2 different formats: decimal and 194 hex. They cannot be used simultaneously 195 - "serial" is used for the decimal format and it's limted in size to 196 unsigned long long int 197 - "serial_hex" is used for the hex format; max length here is 198 MBEDTLS_X509_RFC5280_MAX_SERIAL_LEN*2 199 * The C code follows a new coding style. This is transparent for users but 200 affects contributors and maintainers of local patches. For more 201 information, see 202 https://mbed-tls.readthedocs.io/en/latest/kb/how-to/rewrite-branch-for-coding-style/ 203 * Changed the default MBEDTLS_ECP_WINDOW_SIZE from 6 to 2. 204 As tested in issue 6790, the correlation between this define and 205 RSA decryption performance has changed lately due to security fixes. 206 To fix the performance degradation when using default values the 207 window was reduced from 6 to 2, a value that gives the best or close 208 to best results when tested on Cortex-M4 and Intel i7. 209 * When enabling MBEDTLS_SHA256_USE_A64_CRYPTO_* or 210 MBEDTLS_SHA512_USE_A64_CRYPTO_*, it is no longer necessary to specify 211 compiler target flags on the command line; the library now sets target 212 options within the appropriate modules. 213 214= Mbed TLS 3.3.0 branch released 2022-12-14 215 216Default behavior changes 217 * Previously the macro MBEDTLS_SSL_DTLS_CONNECTION_ID implemented version 05 218 of the IETF draft, and was marked experimental and disabled by default. 219 It is now no longer experimental, and implements the final version from 220 RFC 9146, which is not interoperable with the draft-05 version. 221 If you need to communicate with peers that use earlier versions of 222 Mbed TLS, then you need to define MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT 223 to 1, but then you won't be able to communicate with peers that use the 224 standard (non-draft) version. 225 If you need to interoperate with both classes of peers with the 226 same build of Mbed TLS, please let us know about your situation on the 227 mailing list or GitHub. 228 229Requirement changes 230 * When building with PSA drivers using generate_driver_wrappers.py, or 231 when building the library from the development branch rather than 232 from a release, the Python module jsonschema is now necessary, in 233 addition to jinja2. The official list of required Python modules is 234 maintained in scripts/basic.requirements.txt and may change again 235 in the future. 236 237New deprecations 238 * Deprecate mbedtls_asn1_free_named_data(). 239 Use mbedtls_asn1_free_named_data_list() 240 or mbedtls_asn1_free_named_data_list_shallow(). 241 242Features 243 * Support rsa_pss_rsae_* signature algorithms in TLS 1.2. 244 * make: enable building unversioned shared library, with e.g.: 245 "SHARED=1 SOEXT_TLS=so SOEXT_X509=so SOEXT_CRYPTO=so make lib" 246 resulting in library names like "libmbedtls.so" rather than 247 "libmbedcrypto.so.11". 248 * Expose the EC J-PAKE functionality through the Draft PSA PAKE Crypto API. 249 Only the ECC primitive with secp256r1 curve and SHA-256 hash algorithm 250 are supported in this implementation. 251 * Some modules can now use PSA drivers for hashes, including with no 252 built-in implementation present, but only in some configurations. 253 - RSA OAEP and PSS (PKCS#1 v2.1), PKCS5, PKCS12 and EC J-PAKE now use 254 hashes from PSA when (and only when) MBEDTLS_MD_C is disabled. 255 - PEM parsing of encrypted files now uses MD-5 from PSA when (and only 256 when) MBEDTLS_MD5_C is disabled. 257 See the documentation of the corresponding macros in mbedtls_config.h for 258 details. 259 Note that some modules are not able to use hashes from PSA yet, including 260 the entropy module. As a consequence, for now the only way to build with 261 all hashes only provided by drivers (no built-in hash) is to use 262 MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG. 263 * When MBEDTLS_USE_PSA_CRYPTO is enabled, X.509, TLS 1.2 and TLS 1.3 now 264 properly negotiate/accept hashes based on their availability in PSA. 265 As a consequence, they now work in configurations where the built-in 266 implementations of (some) hashes are excluded and those hashes are only 267 provided by PSA drivers. (See previous entry for limitation on RSA-PSS 268 though: that module only use hashes from PSA when MBEDTLS_MD_C is off). 269 * Add support for opaque keys as the private keys associated to certificates 270 for authentication in TLS 1.3. 271 * Add the LMS post-quantum-safe stateful-hash asymmetric signature scheme. 272 Signature verification is production-ready, but generation is for testing 273 purposes only. This currently only supports one parameter set 274 (LMS_SHA256_M32_H10), meaning that each private key can be used to sign 275 1024 messages. As such, it is not intended for use in TLS, but instead 276 for verification of assets transmitted over an insecure channel, 277 particularly firmware images. 278 * Add the LM-OTS post-quantum-safe one-time signature scheme, which is 279 required for LMS. This can be used independently, but each key can only 280 be used to sign one message so is impractical for most circumstances. 281 * Mbed TLS now supports TLS 1.3 key establishment via pre-shared keys. 282 The pre-shared keys can be provisioned externally or via the ticket 283 mechanism (session resumption). 284 The ticket mechanism is supported when the configuration option 285 MBEDTLS_SSL_SESSION_TICKETS is enabled. 286 New options MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_xxx_ENABLED 287 control the support for the three possible TLS 1.3 key exchange modes. 288 * cert_write: support for setting extended key usage attributes. A 289 corresponding new public API call has been added in the library, 290 mbedtls_x509write_crt_set_ext_key_usage(). 291 * cert_write: support for writing certificate files in either PEM 292 or DER format. 293 * The PSA driver wrapper generator generate_driver_wrappers.py now 294 supports a subset of the driver description language, including 295 the following entry points: import_key, export_key, export_public_key, 296 get_builtin_key, copy_key. 297 * The new functions mbedtls_asn1_free_named_data_list() and 298 mbedtls_asn1_free_named_data_list_shallow() simplify the management 299 of memory in named data lists in X.509 structures. 300 * The TLS 1.2 EC J-PAKE key exchange can now use the PSA Crypto API. 301 Additional PSA key slots will be allocated in the process of such key 302 exchange for builds that enable MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED and 303 MBEDTLS_USE_PSA_CRYPTO. 304 * Add support for DTLS Connection ID as defined by RFC 9146, controlled by 305 MBEDTLS_SSL_DTLS_CONNECTION_ID (enabled by default) and configured with 306 mbedtls_ssl_set_cid(). 307 * Add a driver dispatch layer for raw key agreement, enabling alternative 308 implementations of raw key agreement through the key_agreement driver 309 entry point. This entry point is specified in the proposed PSA driver 310 interface, but had not yet been implemented. 311 * Add an ad-hoc key derivation function handling EC J-PAKE to PMS 312 calculation that can be used to derive the session secret in TLS 1.2, 313 as described in draft-cragie-tls-ecjpake-01. This can be achieved by 314 using PSA_ALG_TLS12_ECJPAKE_TO_PMS as the key derivation algorithm. 315 316Security 317 * Fix potential heap buffer overread and overwrite in DTLS if 318 MBEDTLS_SSL_DTLS_CONNECTION_ID is enabled and 319 MBEDTLS_SSL_CID_IN_LEN_MAX > 2 * MBEDTLS_SSL_CID_OUT_LEN_MAX. 320 * Fix an issue where an adversary with access to precise enough information 321 about memory accesses (typically, an untrusted operating system attacking 322 a secure enclave) could recover an RSA private key after observing the 323 victim performing a single private-key operation if the window size used 324 for the exponentiation was 3 or smaller. Found and reported by Zili KOU, 325 Wenjian HE, Sharad Sinha, and Wei ZHANG. See "Cache Side-channel Attacks 326 and Defenses of the Sliding Window Algorithm in TEEs" - Design, Automation 327 and Test in Europe 2023. 328 329Bugfix 330 * Refactor mbedtls_aes_context to support shallow-copying. Fixes #2147. 331 * Fix an issue with in-tree CMake builds in releases with GEN_FILES 332 turned off: if a shipped file was missing from the working directory, 333 it could be turned into a symbolic link to itself. 334 * Fix a long-standing build failure when building x86 PIC code with old 335 gcc (4.x). The code will be slower, but will compile. We do however 336 recommend upgrading to a more recent compiler instead. Fixes #1910. 337 * Fix support for little-endian Microblaze when MBEDTLS_HAVE_ASM is defined. 338 Contributed by Kazuyuki Kimura to fix #2020. 339 * Use double quotes to include private header file psa_crypto_cipher.h. 340 Fixes 'file not found with <angled> include' error 341 when building with Xcode. 342 * Fix handling of broken symlinks when loading certificates using 343 mbedtls_x509_crt_parse_path(). Instead of returning an error as soon as a 344 broken link is encountered, skip the broken link and continue parsing 345 other certificate files. Contributed by Eduardo Silva in #2602. 346 * Fix an interoperability failure between an Mbed TLS client with both 347 TLS 1.2 and TLS 1.3 support, and a TLS 1.2 server that supports 348 rsa_pss_rsae_* signature algorithms. This failed because Mbed TLS 349 advertised support for PSS in both TLS 1.2 and 1.3, but only 350 actually supported PSS in TLS 1.3. 351 * Fix a compilation error when using CMake with an IAR toolchain. 352 Fixes #5964. 353 * Fix a build error due to a missing prototype warning when 354 MBEDTLS_DEPRECATED_REMOVED is enabled. 355 * Fix mbedtls_ctr_drbg_free() on an initialized but unseeded context. When 356 MBEDTLS_AES_ALT is enabled, it could call mbedtls_aes_free() on an 357 uninitialized context. 358 * Fix a build issue on Windows using CMake where the source and build 359 directories could not be on different drives. Fixes #5751. 360 * Fix bugs and missing dependencies when building and testing 361 configurations with only one encryption type enabled in TLS 1.2. 362 * Provide the missing definition of mbedtls_setbuf() in some configurations 363 with MBEDTLS_PLATFORM_C disabled. Fixes #6118, #6196. 364 * Fix compilation errors when trying to build with 365 PSA drivers for AEAD (GCM, CCM, Chacha20-Poly1305). 366 * Fix memory leak in ssl_parse_certificate_request() caused by 367 mbedtls_x509_get_name() not freeing allocated objects in case of error. 368 Change mbedtls_x509_get_name() to clean up allocated objects on error. 369 * Fix build failure with MBEDTLS_RSA_C and MBEDTLS_PSA_CRYPTO_C but not 370 MBEDTLS_USE_PSA_CRYPTO or MBEDTLS_PK_WRITE_C. Fixes #6408. 371 * Fix build failure with MBEDTLS_RSA_C and MBEDTLS_PSA_CRYPTO_C but not 372 MBEDTLS_PK_PARSE_C. Fixes #6409. 373 * Fix ECDSA verification, where it was not always validating the 374 public key. This bug meant that it was possible to verify a 375 signature with an invalid public key, in some cases. Reported by 376 Guido Vranken using Cryptofuzz in #4420. 377 * Fix a possible null pointer dereference if a memory allocation fails 378 in TLS PRF code. Reported by Michael Madsen in #6516. 379 * Fix TLS 1.3 session resumption. Fixes #6488. 380 * Add a configuration check to exclude optional client authentication 381 in TLS 1.3 (where it is forbidden). 382 * Fix a bug in which mbedtls_x509_crt_info() would produce non-printable 383 bytes when parsing certificates containing a binary RFC 4108 384 HardwareModuleName as a Subject Alternative Name extension. Hardware 385 serial numbers are now rendered in hex format. Fixes #6262. 386 * Fix bug in error reporting in dh_genprime.c where upon failure, 387 the error code returned by mbedtls_mpi_write_file() is overwritten 388 and therefore not printed. 389 * In the bignum module, operations of the form (-A) - (+A) or (-A) - (-A) 390 with A > 0 created an unintended representation of the value 0 which was 391 not processed correctly by some bignum operations. Fix this. This had no 392 consequence on cryptography code, but might affect applications that call 393 bignum directly and use negative numbers. 394 * Fix a bug whereby the list of signature algorithms sent as part of 395 the TLS 1.2 server certificate request would get corrupted, meaning the 396 first algorithm would not get sent and an entry consisting of two random 397 bytes would be sent instead. Found by Serban Bejan and Dudek Sebastian. 398 * Fix undefined behavior (typically harmless in practice) of 399 mbedtls_mpi_add_mpi(), mbedtls_mpi_add_abs() and mbedtls_mpi_add_int() 400 when both operands are 0 and the left operand is represented with 0 limbs. 401 * Fix undefined behavior (typically harmless in practice) when some bignum 402 functions receive the most negative value of mbedtls_mpi_sint. Credit 403 to OSS-Fuzz. Fixes #6597. 404 * Fix undefined behavior (typically harmless in practice) in PSA ECB 405 encryption and decryption. 406 * Move some SSL-specific code out of libmbedcrypto where it had been placed 407 accidentally. 408 * Fix a build error when compiling the bignum module for some Arm platforms. 409 Fixes #6089, #6124, #6217. 410 411Changes 412 * Add the ability to query PSA_WANT_xxx macros to query_compile_time_config. 413 * Calling AEAD tag-specific functions for non-AEAD algorithms (which 414 should not be done - they are documented for use only by AES-GCM and 415 ChaCha20+Poly1305) now returns MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE 416 instead of success (0). 417 418= Mbed TLS 3.2.1 branch released 2022-07-12 419 420Bugfix 421 * Re-add missing generated file library/psa_crypto_driver_wrappers.c 422 423= Mbed TLS 3.2.0 branch released 2022-07-11 424 425Default behavior changes 426 * mbedtls_cipher_set_iv will now fail with ChaCha20 and ChaCha20+Poly1305 427 for IV lengths other than 12. The library was silently overwriting this 428 length with 12, but did not inform the caller about it. Fixes #4301. 429 430Requirement changes 431 * The library will no longer compile out of the box on a platform without 432 setbuf(). If your platform does not have setbuf(), you can configure an 433 alternative function by enabling MBEDTLS_PLATFORM_SETBUF_ALT or 434 MBEDTLS_PLATFORM_SETBUF_MACRO. 435 436New deprecations 437 * Deprecate mbedtls_ssl_conf_max_version() and 438 mbedtls_ssl_conf_min_version() in favor of 439 mbedtls_ssl_conf_max_tls_version() and 440 mbedtls_ssl_conf_min_tls_version(). 441 * Deprecate mbedtls_cipher_setup_psa(). Use psa_aead_xxx() or 442 psa_cipher_xxx() directly instead. 443 * Secure element drivers enabled by MBEDTLS_PSA_CRYPTO_SE_C are deprecated. 444 This was intended as an experimental feature, but had not been explicitly 445 documented as such. Use opaque drivers with the interface enabled by 446 MBEDTLS_PSA_CRYPTO_DRIVERS instead. 447 * Deprecate mbedtls_ssl_conf_sig_hashes() in favor of the more generic 448 mbedtls_ssl_conf_sig_algs(). Signature algorithms for the TLS 1.2 and 449 TLS 1.3 handshake should now be configured with 450 mbedtls_ssl_conf_sig_algs(). 451 452Features 453 * Add accessor to obtain ciphersuite id from ssl context. 454 * Add accessors to get members from ciphersuite info. 455 * Add mbedtls_ssl_ticket_rotate() for external ticket rotation. 456 * Add accessor to get the raw buffer pointer from a PEM context. 457 * The structures mbedtls_ssl_config and mbedtls_ssl_context now store 458 a piece of user data which is reserved for the application. The user 459 data can be either a pointer or an integer. 460 * Add an accessor function to get the configuration associated with 461 an SSL context. 462 * Add a function to access the protocol version from an SSL context in a 463 form that's easy to compare. Fixes #5407. 464 * Add function mbedtls_md_info_from_ctx() to recall the message digest 465 information that was used to set up a message digest context. 466 * Add ALPN support in TLS 1.3 clients. 467 * Add server certificate selection callback near end of Client Hello. 468 Register callback with mbedtls_ssl_conf_cert_cb(). 469 * Provide mechanism to reset handshake cert list by calling 470 mbedtls_ssl_set_hs_own_cert() with NULL value for own_cert param. 471 * Add accessor mbedtls_ssl_get_hs_sni() to retrieve SNI from within 472 cert callback (mbedtls_ssl_conf_cert_cb()) during handshake. 473 * The X.509 module now uses PSA hash acceleration if present. 474 * Add support for psa crypto key derivation for elliptic curve 475 keys. Fixes #3260. 476 * Add function mbedtls_timing_get_final_delay() to access the private 477 final delay field in an mbedtls_timing_delay_context, as requested in 478 #5183. 479 * Add mbedtls_pk_sign_ext() which allows generating RSA-PSS signatures when 480 PSA Crypto is enabled. 481 * Add function mbedtls_ecp_export() to export ECP key pair parameters. 482 Fixes #4838. 483 * Add function mbedtls_ssl_is_handshake_over() to enable querying if the SSL 484 Handshake has completed or not, and thus whether to continue calling 485 mbedtls_ssl_handshake_step(), requested in #4383. 486 * Add the function mbedtls_ssl_get_own_cid() to access our own connection id 487 within mbedtls_ssl_context, as requested in #5184. 488 * Introduce mbedtls_ssl_hs_cb_t typedef for use with 489 mbedtls_ssl_conf_cert_cb() and perhaps future callbacks 490 during TLS handshake. 491 * Add functions mbedtls_ssl_conf_max_tls_version() and 492 mbedtls_ssl_conf_min_tls_version() that use a single value to specify 493 the protocol version. 494 * Extend the existing PSA_ALG_TLS12_PSK_TO_MS() algorithm to support 495 mixed-PSK. Add an optional input PSA_KEY_DERIVATION_INPUT_OTHER_SECRET 496 holding the other secret. 497 * When MBEDTLS_PSA_CRYPTO_CONFIG is enabled, you may list the PSA crypto 498 feature requirements in the file named by the new macro 499 MBEDTLS_PSA_CRYPTO_CONFIG_FILE instead of the default psa/crypto_config.h. 500 Furthermore you may name an additional file to include after the main 501 file with the macro MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE. 502 * Add the function mbedtls_x509_crt_has_ext_type() to access the ext types 503 field within mbedtls_x509_crt context, as requested in #5585. 504 * Add HKDF-Expand and HKDF-Extract as separate algorithms in the PSA API. 505 * Add support for the ARMv8 SHA-2 acceleration instructions when building 506 for Aarch64. 507 * Add support for authentication of TLS 1.3 clients by TLS 1.3 servers. 508 * Add support for server HelloRetryRequest message. The TLS 1.3 client is 509 now capable of negotiating another shared secret if the one sent in its 510 first ClientHello was not suitable to the server. 511 * Add support for client-side TLS version negotiation. If both TLS 1.2 and 512 TLS 1.3 protocols are enabled in the build of Mbed TLS, the TLS client now 513 negotiates TLS 1.3 or TLS 1.2 with TLS servers. 514 * Enable building of Mbed TLS with TLS 1.3 protocol support but without TLS 515 1.2 protocol support. 516 * Mbed TLS provides an implementation of a TLS 1.3 server (ephemeral key 517 establishment only). See docs/architecture/tls13-support.md for a 518 description of the support. The MBEDTLS_SSL_PROTO_TLS1_3 and 519 MBEDTLS_SSL_SRV_C configuration options control this. 520 * Add accessors to configure DN hints for certificate request: 521 mbedtls_ssl_conf_dn_hints() and mbedtls_ssl_set_hs_dn_hints() 522 * The configuration option MBEDTLS_USE_PSA_CRYPTO, which previously 523 affected only a limited subset of crypto operations in TLS, X.509 and PK, 524 now causes most of them to be done using PSA Crypto; see 525 docs/use-psa-crypto.md for the list of exceptions. 526 * The function mbedtls_pk_setup_opaque() now supports RSA key pairs as well. 527 Opaque keys can now be used everywhere a private key is expected in the 528 TLS and X.509 modules. 529 * Opaque pre-shared keys for TLS, provisioned with 530 mbedtls_ssl_conf_psk_opaque() or mbedtls_ssl_set_hs_psk_opaque(), which 531 previously only worked for "pure" PSK key exchange, now can also be used 532 for the "mixed" PSK key exchanges as well: ECDHE-PSK, DHE-PSK, RSA-PSK. 533 * cmake now detects if it is being built as a sub-project, and in that case 534 disables the target export/installation and package configuration. 535 * Make USE_PSA_CRYPTO compatible with KEY_ID_ENCODES_OWNER. Fixes #5259. 536 * Add example programs cipher_aead_demo.c, md_hmac_demo.c, aead_demo.c 537 and hmac_demo.c, which use PSA and the md/cipher interfaces side 538 by side in order to illustrate how the operation is performed in PSA. 539 Addresses #5208. 540 541Security 542 * Zeroize dynamically-allocated buffers used by the PSA Crypto key storage 543 module before freeing them. These buffers contain secret key material, and 544 could thus potentially leak the key through freed heap. 545 * Fix potential memory leak inside mbedtls_ssl_cache_set() with 546 an invalid session id length. 547 * Add the platform function mbedtls_setbuf() to allow buffering to be 548 disabled on stdio files, to stop secrets loaded from said files being 549 potentially left in memory after file operations. Reported by 550 Glenn Strauss. 551 * Fix a potential heap buffer overread in TLS 1.2 server-side when 552 MBEDTLS_USE_PSA_CRYPTO is enabled, an opaque key (created with 553 mbedtls_pk_setup_opaque()) is provisioned, and a static ECDH ciphersuite 554 is selected. This may result in an application crash or potentially an 555 information leak. 556 * Fix a buffer overread in DTLS ClientHello parsing in servers with 557 MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE enabled. An unauthenticated client 558 or a man-in-the-middle could cause a DTLS server to read up to 255 bytes 559 after the end of the SSL input buffer. The buffer overread only happens 560 when MBEDTLS_SSL_IN_CONTENT_LEN is less than a threshold that depends on 561 the exact configuration: 258 bytes if using mbedtls_ssl_cookie_check(), 562 and possibly up to 571 bytes with a custom cookie check function. 563 Reported by the Cybeats PSI Team. 564 * Fix a buffer overread in TLS 1.3 Certificate parsing. An unauthenticated 565 client or server could cause an MbedTLS server or client to overread up 566 to 64 kBytes of data and potentially overread the input buffer by that 567 amount minus the size of the input buffer. As overread data undergoes 568 various checks, the likelihood of reaching the boundary of the input 569 buffer is rather small but increases as its size 570 MBEDTLS_SSL_IN_CONTENT_LEN decreases. 571 * Fix check of certificate key usage in TLS 1.3. The usage of the public key 572 provided by a client or server certificate for authentication was not 573 checked properly when validating the certificate. This could cause a 574 client or server to be able to authenticate itself through a certificate 575 to an Mbed TLS TLS 1.3 server or client while it does not own a proper 576 certificate to do so. 577 578Bugfix 579 * Declare or use PSA_WANT_ALG_CCM_STAR_NO_TAG following the general 580 pattern for PSA_WANT_xxx symbols. Previously you had to specify 581 PSA_WANT_ALG_CCM for PSA_ALG_CCM_STAR_NO_TAG. 582 * Fix a memory leak if mbedtls_ssl_config_defaults() is called twice. 583 * Fixed swap of client and server random bytes when exporting them alongside 584 TLS 1.3 handshake and application traffic secret. 585 * Fix several bugs (warnings, compiler and linker errors, test failures) 586 in reduced configurations when MBEDTLS_USE_PSA_CRYPTO is enabled. 587 * Fix a bug in (D)TLS curve negotiation: when MBEDTLS_USE_PSA_CRYPTO was 588 enabled and an ECDHE-ECDSA or ECDHE-RSA key exchange was used, the 589 client would fail to check that the curve selected by the server for 590 ECDHE was indeed one that was offered. As a result, the client would 591 accept any curve that it supported, even if that curve was not allowed 592 according to its configuration. Fixes #5291. 593 * The TLS 1.3 implementation is now compatible with the 594 MBEDTLS_USE_PSA_CRYPTO configuration option. 595 * Fix unit tests that used 0 as the file UID. This failed on some 596 implementations of PSA ITS. Fixes #3838. 597 * Fix mbedtls_ssl_get_version() not reporting TLSv1.3. Fixes #5406. 598 * Fix API violation in mbedtls_md_process() test by adding a call to 599 mbedtls_md_starts(). Fixes #2227. 600 * Fix compile errors when MBEDTLS_HAVE_TIME is not defined. Add tests 601 to catch bad uses of time.h. 602 * Fix a race condition in out-of-source builds with CMake when generated data 603 files are already present. Fixes #5374. 604 * Fix the library search path when building a shared library with CMake 605 on Windows. 606 * Fix bug in the alert sending function mbedtls_ssl_send_alert_message() 607 potentially leading to corrupted alert messages being sent in case 608 the function needs to be re-called after initially returning 609 MBEDTLS_SSL_WANT_WRITE. Fixes #1916. 610 * In configurations with MBEDTLS_SSL_DTLS_CONNECTION_ID enabled but not 611 MBEDTLS_DEBUG_C, DTLS handshakes using CID would crash due to a null 612 pointer dereference. Fix this. Fixes #3998. 613 The fix was released, but not announced, in Mbed TLS 3.1.0. 614 * Fix incorrect documentation of mbedtls_x509_crt_profile. The previous 615 documentation stated that the `allowed_pks` field applies to signatures 616 only, but in fact it does apply to the public key type of the end entity 617 certificate, too. Fixes #1992. 618 * Fix undefined behavior in mbedtls_asn1_find_named_data(), where val is 619 not NULL and val_len is zero. 620 * Fix compilation error with mingw32. Fixed by Cameron Cawley in #4211. 621 * Fix compilation error when using C++ Builder on Windows. Reported by 622 Miroslav Mastny in #4015. 623 * psa_raw_key_agreement() now returns PSA_ERROR_BUFFER_TOO_SMALL when 624 applicable. Fixes #5735. 625 * Fix a bug in the x25519 example program where the removal of 626 MBEDTLS_ECDH_LEGACY_CONTEXT caused the program not to run. Fixes #4901 and 627 #3191. 628 * Fix a TLS 1.3 handshake failure when the peer Finished message has not 629 been received yet when we first try to fetch it. 630 * Encode X.509 dates before 1/1/2000 as UTCTime rather than 631 GeneralizedTime. Fixes #5465. 632 * Add mbedtls_x509_dn_get_next function to return the next relative DN in 633 an X509 name, to allow walking the name list. Fixes #5431. 634 * Fix order value of curve x448. 635 * Fix string representation of DNs when outputting values containing commas 636 and other special characters, conforming to RFC 1779. Fixes #769. 637 * Silence a warning from GCC 12 in the selftest program. Fixes #5974. 638 * Fix check_config.h to check that we have MBEDTLS_SSL_KEEP_PEER_CERTIFICATE 639 when MBEDTLS_SSL_PROTO_TLS1_3 is specified, and make this and other 640 dependencies explicit in the documentation. Fixes #5610. 641 * Fix mbedtls_asn1_write_mpi() writing an incorrect encoding of 0. 642 * Fix a TLS 1.3 handshake failure when the first attempt to send the client 643 Finished message on the network cannot be satisfied. Fixes #5499. 644 * Fix resource leaks in mbedtls_pk_parse_public_key() in low 645 memory conditions. 646 * Fix server connection identifier setting for outgoing encrypted records 647 on DTLS 1.2 session resumption. After DTLS 1.2 session resumption with 648 connection identifier, the Mbed TLS client now properly sends the server 649 connection identifier in encrypted record headers. Fix #5872. 650 * Fix a null pointer dereference when performing some operations on zero 651 represented with 0 limbs (specifically mbedtls_mpi_mod_int() dividing 652 by 2, and mbedtls_mpi_write_string() in base 2). 653 * Fix record sizes larger than 16384 being sometimes accepted despite being 654 non-compliant. This could not lead to a buffer overflow. In particular, 655 application data size was already checked correctly. 656 * Fix MBEDTLS_SVC_KEY_ID_GET_KEY_ID() and MBEDTLS_SVC_KEY_ID_GET_OWNER_ID() 657 which have been broken, resulting in compilation errors, since Mbed TLS 658 3.0. 659 * Ensure that TLS 1.2 ciphersuite/certificate and key selection takes into 660 account not just the type of the key (RSA vs EC) but also what it can 661 actually do. Resolves #5831. 662 * Fix CMake windows host detection, especially when cross compiling. 663 * Fix an error in make where the absence of a generated file caused 664 make to break on a clean checkout. Fixes #5340. 665 * Work around an MSVC ARM64 compiler bug causing incorrect behaviour 666 in mbedtls_mpi_exp_mod(). Reported by Tautvydas Žilys in #5467. 667 * Removed the prompt to exit from all windows build programs, which was causing 668 issues in CI/CD environments. 669 670Changes 671 * The file library/psa_crypto_driver_wrappers.c is now generated 672 from a template. In the future, the generation will support 673 driver descriptions. For the time being, to customize this file, 674 see docs/proposed/psa-driver-wrappers-codegen-migration-guide.md 675 * Return PSA_ERROR_INVALID_ARGUMENT if the algorithm passed to one-shot 676 AEAD functions is not an AEAD algorithm. This aligns them with the 677 multipart functions, and the PSA Crypto API 1.1 specification. 678 * In mbedtls_pk_parse_key(), if no password is provided, don't allocate a 679 temporary variable on the heap. Suggested by Sergey Kanatov in #5304. 680 * Assume source files are in UTF-8 when using MSVC with CMake. 681 * Fix runtime library install location when building with CMake and MinGW. 682 DLLs are now installed in the bin directory instead of lib. 683 * cmake: Use GnuInstallDirs to customize install directories 684 Replace custom LIB_INSTALL_DIR variable with standard CMAKE_INSTALL_LIBDIR 685 variable. For backward compatibility, set CMAKE_INSTALL_LIBDIR if 686 LIB_INSTALL_DIR is set. 687 * Add a CMake option that enables static linking of the runtime library 688 in Microsoft Visual C++ compiler. Contributed by Microplankton. 689 * In CMake builds, add aliases for libraries so that the normal MbedTLS::* 690 targets work when MbedTLS is built as a subdirectory. This allows the 691 use of FetchContent, as requested in #5688. 692 693= mbed TLS 3.1.0 branch released 2021-12-17 694 695API changes 696 * New error code for GCM: MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL. 697 Alternative GCM implementations are expected to verify 698 the length of the provided output buffers and to return the 699 MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL in case the buffer length is too small. 700 * You can configure groups for a TLS key exchange with the new function 701 mbedtls_ssl_conf_groups(). It extends mbedtls_ssl_conf_curves(). 702 * Declare a number of structure fields as public: the fields of 703 mbedtls_ecp_curve_info, the fields describing the result of ASN.1 and 704 X.509 parsing, and finally the field fd of mbedtls_net_context on 705 POSIX/Unix-like platforms. 706 707Requirement changes 708 * Sign-magnitude and one's complement representations for signed integers are 709 not supported. Two's complement is the only supported representation. 710 711New deprecations 712 * Deprecate mbedtls_ssl_conf_curves() in favor of the more generic 713 mbedtls_ssl_conf_groups(). 714 715Removals 716 * Remove the partial support for running unit tests via Greentea on Mbed OS, 717 which had been unmaintained since 2018. 718 719Features 720 * Enable support for Curve448 via the PSA API. Contributed by 721 Archana Madhavan in #4626. Fixes #3399 and #4249. 722 * The identifier of the CID TLS extension can be configured by defining 723 MBEDTLS_TLS_EXT_CID at compile time. 724 * Implement the PSA multipart AEAD interface, currently supporting 725 ChaChaPoly and GCM. 726 * Warn if errors from certain functions are ignored. This is currently 727 supported on GCC-like compilers and on MSVC and can be configured through 728 the macro MBEDTLS_CHECK_RETURN. The warnings are always enabled 729 (where supported) for critical functions where ignoring the return 730 value is almost always a bug. Enable the new configuration option 731 MBEDTLS_CHECK_RETURN_WARNING to get warnings for other functions. This 732 is currently implemented in the AES, DES and md modules, and will be 733 extended to other modules in the future. 734 * Add missing PSA macros declared by PSA Crypto API 1.0.0: 735 PSA_ALG_IS_SIGN_HASH, PSA_ALG_NONE, PSA_HASH_BLOCK_LENGTH, PSA_KEY_ID_NULL. 736 * Add support for CCM*-no-tag cipher to the PSA. 737 Currently only 13-byte long IV's are supported. 738 For decryption a minimum of 16-byte long input is expected. 739 These restrictions may be subject to change. 740 * Add new API mbedtls_ct_memcmp for constant time buffer comparison. 741 * Add functions to get the IV and block size from cipher_info structs. 742 * Add functions to check if a cipher supports variable IV or key size. 743 * Add the internal implementation of and support for CCM to the PSA multipart 744 AEAD interface. 745 * Mbed TLS provides a minimum viable implementation of the TLS 1.3 746 protocol. See docs/architecture/tls13-support.md for the definition of 747 the TLS 1.3 Minimum Viable Product (MVP). The MBEDTLS_SSL_PROTO_TLS1_3 748 configuration option controls the enablement of the support. The APIs 749 mbedtls_ssl_conf_min_version() and mbedtls_ssl_conf_max_version() allow 750 to select the 1.3 version of the protocol to establish a TLS connection. 751 * Add PSA API definition for ARIA. 752 753Security 754 * Zeroize several intermediate variables used to calculate the expected 755 value when verifying a MAC or AEAD tag. This hardens the library in 756 case the value leaks through a memory disclosure vulnerability. For 757 example, a memory disclosure vulnerability could have allowed a 758 man-in-the-middle to inject fake ciphertext into a DTLS connection. 759 * In psa_aead_generate_nonce(), do not read back from the output buffer. 760 This fixes a potential policy bypass or decryption oracle vulnerability 761 if the output buffer is in memory that is shared with an untrusted 762 application. 763 * In psa_cipher_generate_iv() and psa_cipher_encrypt(), do not read back 764 from the output buffer. This fixes a potential policy bypass or decryption 765 oracle vulnerability if the output buffer is in memory that is shared with 766 an untrusted application. 767 * Fix a double-free that happened after mbedtls_ssl_set_session() or 768 mbedtls_ssl_get_session() failed with MBEDTLS_ERR_SSL_ALLOC_FAILED 769 (out of memory). After that, calling mbedtls_ssl_session_free() 770 and mbedtls_ssl_free() would cause an internal session buffer to 771 be free()'d twice. 772 773Bugfix 774 * Stop using reserved identifiers as local variables. Fixes #4630. 775 * The GNU makefiles invoke python3 in preference to python except on Windows. 776 The check was accidentally not performed when cross-compiling for Windows 777 on Linux. Fix this. Fixes #4774. 778 * Prevent divide by zero if either of PSA_CIPHER_ENCRYPT_OUTPUT_SIZE() or 779 PSA_CIPHER_UPDATE_OUTPUT_SIZE() were called using an asymmetric key type. 780 * Fix a parameter set but unused in psa_crypto_cipher.c. Fixes #4935. 781 * Don't use the obsolete header path sys/fcntl.h in unit tests. 782 These header files cause compilation errors in musl. 783 Fixes #4969. 784 * Fix missing constraints on x86_64 and aarch64 assembly code 785 for bignum multiplication that broke some bignum operations with 786 (at least) Clang 12. 787 Fixes #4116, #4786, #4917, #4962. 788 * Fix mbedtls_cipher_crypt: AES-ECB when MBEDTLS_USE_PSA_CRYPTO is enabled. 789 * Failures of alternative implementations of AES or DES single-block 790 functions enabled with MBEDTLS_AES_ENCRYPT_ALT, MBEDTLS_AES_DECRYPT_ALT, 791 MBEDTLS_DES_CRYPT_ECB_ALT or MBEDTLS_DES3_CRYPT_ECB_ALT were ignored. 792 This does not concern the implementation provided with Mbed TLS, 793 where this function cannot fail, or full-module replacements with 794 MBEDTLS_AES_ALT or MBEDTLS_DES_ALT. Reported by Armelle Duboc in #1092. 795 * Some failures of HMAC operations were ignored. These failures could only 796 happen with an alternative implementation of the underlying hash module. 797 * Fix the error returned by psa_generate_key() for a public key. Fixes #4551. 798 * Fix compile-time or run-time errors in PSA 799 AEAD functions when ChachaPoly is disabled. Fixes #5065. 800 * Remove PSA'a AEAD finish/verify output buffer limitation for GCM. 801 The requirement of minimum 15 bytes for output buffer in 802 psa_aead_finish() and psa_aead_verify() does not apply to the built-in 803 implementation of GCM. 804 * Move GCM's update output buffer length verification from PSA AEAD to 805 the built-in implementation of the GCM. 806 The requirement for output buffer size to be equal or greater then 807 input buffer size is valid only for the built-in implementation of GCM. 808 Alternative GCM implementations can process whole blocks only. 809 * Fix the build of sample programs when neither MBEDTLS_ERROR_C nor 810 MBEDTLS_ERROR_STRERROR_DUMMY is enabled. 811 * Fix PSA_ALG_RSA_PSS verification accepting an arbitrary salt length. 812 This algorithm now accepts only the same salt length for verification 813 that it produces when signing, as documented. Use the new algorithm 814 PSA_ALG_RSA_PSS_ANY_SALT to accept any salt length. Fixes #4946. 815 * The existing predicate macro name PSA_ALG_IS_HASH_AND_SIGN is now reserved 816 for algorithm values that fully encode the hashing step, as per the PSA 817 Crypto API specification. This excludes PSA_ALG_RSA_PKCS1V15_SIGN_RAW and 818 PSA_ALG_ECDSA_ANY. The new predicate macro PSA_ALG_IS_SIGN_HASH covers 819 all algorithms that can be used with psa_{sign,verify}_hash(), including 820 these two. 821 * Fix issue in Makefile on Linux with SHARED=1, that caused shared libraries 822 not to list other shared libraries they need. 823 * Fix a bug in mbedtls_gcm_starts() when the bit length of the iv 824 exceeds 2^32. Fixes #4884. 825 * Fix an uninitialized variable warning in test_suite_ssl.function with GCC 826 version 11. 827 * Fix the build when no SHA2 module is included. Fixes #4930. 828 * Fix the build when only the bignum module is included. Fixes #4929. 829 * Fix a potential invalid pointer dereference and infinite loop bugs in 830 pkcs12 functions when the password is empty. Fix the documentation to 831 better describe the inputs to these functions and their possible values. 832 Fixes #5136. 833 * The key usage flags PSA_KEY_USAGE_SIGN_MESSAGE now allows the MAC 834 operations psa_mac_compute() and psa_mac_sign_setup(). 835 * The key usage flags PSA_KEY_USAGE_VERIFY_MESSAGE now allows the MAC 836 operations psa_mac_verify() and psa_mac_verify_setup(). 837 838Changes 839 * Explicitly mark the fields mbedtls_ssl_session.exported and 840 mbedtls_ssl_config.respect_cli_pref as private. This was an 841 oversight during the run-up to the release of Mbed TLS 3.0. 842 The fields were never intended to be public. 843 * Implement multi-part CCM API. 844 The multi-part functions: mbedtls_ccm_starts(), mbedtls_ccm_set_lengths(), 845 mbedtls_ccm_update_ad(), mbedtls_ccm_update(), mbedtls_ccm_finish() 846 were introduced in mbedTLS 3.0 release, however their implementation was 847 postponed until now. 848 Implemented functions support chunked data input for both CCM and CCM* 849 algorithms. 850 * Remove MBEDTLS_SSL_EXPORT_KEYS, making it always on and increasing the 851 code size by about 80B on an M0 build. This option only gated an ability 852 to set a callback, but was deemed unnecessary as it was yet another define 853 to remember when writing tests, or test configurations. Fixes #4653. 854 * Improve the performance of base64 constant-flow code. The result is still 855 slower than the original non-constant-flow implementation, but much faster 856 than the previous constant-flow implementation. Fixes #4814. 857 * Ignore plaintext/ciphertext lengths for CCM*-no-tag operations. 858 For CCM* encryption/decryption without authentication, input 859 length will be ignored. 860 * Indicate in the error returned if the nonce length used with 861 ChaCha20-Poly1305 is invalid, and not just unsupported. 862 * The mbedcrypto library includes a new source code module constant_time.c, 863 containing various functions meant to resist timing side channel attacks. 864 This module does not have a separate configuration option, and functions 865 from this module will be included in the build as required. Currently 866 most of the interface of this module is private and may change at any 867 time. 868 * The generated configuration-independent files are now automatically 869 generated by the CMake build system on Unix-like systems. This is not 870 yet supported when cross-compiling. 871 872= Mbed TLS 3.0.0 branch released 2021-07-07 873 874API changes 875 * Remove HAVEGE module. 876 The design of HAVEGE makes it unsuitable for microcontrollers. Platforms 877 with a more complex CPU usually have an operating system interface that 878 provides better randomness. Instead of HAVEGE, declare OS or hardware RNG 879 interfaces with mbedtls_entropy_add_source() and/or use an entropy seed 880 file created securely during device provisioning. See 881 https://mbed-tls.readthedocs.io/en/latest/kb/how-to/add-entropy-sources-to-entropy-pool/ for 882 more information. 883 * Add missing const attributes to API functions. 884 * Remove helpers for the transition from Mbed TLS 1.3 to Mbed TLS 2.0: the 885 header compat-1.3.h and the script rename.pl. 886 * Remove certs module from the API. 887 Transfer keys and certificates embedded in the library to the test 888 component. This contributes to minimizing library API and discourages 889 users from using unsafe keys in production. 890 * Move alt helpers and definitions. 891 Various helpers and definitions available for use in alt implementations 892 have been moved out of the include/ directory and into the library/ 893 directory. The files concerned are ecp_internal.h and rsa_internal.h 894 which have also been renamed to ecp_internal_alt.h and rsa_alt_helpers.h 895 respectively. 896 * Move internal headers. 897 Header files that were only meant for the library's internal use and 898 were not meant to be used in application code have been moved out of 899 the include/ directory. The headers concerned are bn_mul.h, aesni.h, 900 padlock.h, entropy_poll.h and *_internal.h. 901 * Drop support for parsing SSLv2 ClientHello 902 (MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO). 903 * Drop support for SSLv3 (MBEDTLS_SSL_PROTO_SSL3). 904 * Drop support for TLS record-level compression (MBEDTLS_ZLIB_SUPPORT). 905 * Drop support for RC4 TLS ciphersuites. 906 * Drop support for single-DES ciphersuites. 907 * Drop support for MBEDTLS_SSL_HW_RECORD_ACCEL. 908 * Update AEAD output size macros to bring them in line with the PSA Crypto 909 API version 1.0 spec. This version of the spec parameterizes them on the 910 key type used, as well as the key bit-size in the case of 911 PSA_AEAD_TAG_LENGTH. 912 * Add configuration option MBEDTLS_X509_REMOVE_INFO which 913 removes the mbedtls_x509_*_info(), mbedtls_debug_print_crt() 914 as well as other functions and constants only used by 915 those functions. This reduces the code footprint by 916 several kB. 917 * Remove SSL error codes `MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED` 918 and `MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH` which are never 919 returned from the public SSL API. 920 * Remove `MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE` and return 921 `MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL` instead. 922 * The output parameter of mbedtls_sha512_finish, mbedtls_sha512, 923 mbedtls_sha256_finish and mbedtls_sha256 now has a pointer type 924 rather than array type. This removes spurious warnings in some compilers 925 when outputting a SHA-384 or SHA-224 hash into a buffer of exactly 926 the hash size. 927 * Remove the MBEDTLS_TEST_NULL_ENTROPY config option. Fixes #4388. 928 * The interface of the GCM module has changed to remove restrictions on 929 how the input to multipart operations is broken down. mbedtls_gcm_finish() 930 now takes extra output parameters for the last partial output block. 931 mbedtls_gcm_update() now takes extra parameters for the output length. 932 The software implementation always produces the full output at each 933 call to mbedtls_gcm_update(), but alternative implementations activated 934 by MBEDTLS_GCM_ALT may delay partial blocks to the next call to 935 mbedtls_gcm_update() or mbedtls_gcm_finish(). Furthermore, applications 936 no longer pass the associated data to mbedtls_gcm_starts(), but to the 937 new function mbedtls_gcm_update_ad(). 938 These changes are backward compatible for users of the cipher API. 939 * Replace MBEDTLS_SHA512_NO_SHA384 config option with MBEDTLS_SHA384_C. 940 This separates config option enabling the SHA384 algorithm from option 941 enabling the SHA512 algorithm. Fixes #4034. 942 * Introduce MBEDTLS_SHA224_C. 943 This separates config option enabling the SHA224 algorithm from option 944 enabling SHA256. 945 * The getter and setter API of the SSL session cache (used for 946 session-ID based session resumption) has changed to that of 947 a key-value store with keys being session IDs and values 948 being opaque instances of `mbedtls_ssl_session`. 949 * Remove the mode parameter from RSA operation functions. Signature and 950 decryption functions now always use the private key and verification and 951 encryption use the public key. Verification functions also no longer have 952 RNG parameters. 953 * Modify semantics of `mbedtls_ssl_conf_[opaque_]psk()`: 954 In Mbed TLS 2.X, the API prescribes that later calls overwrite 955 the effect of earlier calls. In Mbed TLS 3.0, calling 956 `mbedtls_ssl_conf_[opaque_]psk()` more than once will fail, 957 leaving the PSK that was configured first intact. 958 Support for more than one PSK may be added in 3.X. 959 * The function mbedtls_x509write_csr_set_extension() has an extra parameter 960 which allows to mark an extension as critical. Fixes #4055. 961 * For multi-part AEAD operations with the cipher module, calling 962 mbedtls_cipher_finish() is now mandatory. Previously the documentation 963 was unclear on this point, and this function happened to never do 964 anything with the currently implemented AEADs, so in practice it was 965 possible to skip calling it, which is no longer supported. 966 * The option MBEDTLS_ECP_FIXED_POINT_OPTIM use pre-computed comb tables 967 instead of computing tables in runtime. Thus, this option now increase 968 code size, and it does not increase RAM usage in runtime anymore. 969 * Remove the SSL APIs mbedtls_ssl_get_input_max_frag_len() and 970 mbedtls_ssl_get_output_max_frag_len(), and add a new API 971 mbedtls_ssl_get_max_in_record_payload(), complementing the existing 972 mbedtls_ssl_get_max_out_record_payload(). 973 Uses of mbedtls_ssl_get_input_max_frag_len() and 974 mbedtls_ssl_get_input_max_frag_len() should be replaced by 975 mbedtls_ssl_get_max_in_record_payload() and 976 mbedtls_ssl_get_max_out_record_payload(), respectively. 977 * mbedtls_rsa_init() now always selects the PKCS#1v1.5 encoding for an RSA 978 key. To use an RSA key with PSS or OAEP, call mbedtls_rsa_set_padding() 979 after initializing the context. mbedtls_rsa_set_padding() now returns an 980 error if its parameters are invalid. 981 * Replace MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE by a runtime 982 configuration function mbedtls_ssl_conf_preference_order(). Fixes #4398. 983 * Instead of accessing the len field of a DHM context, which is no longer 984 supported, use the new function mbedtls_dhm_get_len() . 985 * In modules that implement cryptographic hash functions, many functions 986 mbedtls_xxx() now return int instead of void, and the corresponding 987 function mbedtls_xxx_ret() which was identical except for returning int 988 has been removed. This also concerns mbedtls_xxx_drbg_update(). See the 989 migration guide for more information. Fixes #4212. 990 * For all functions that take a random number generator (RNG) as a 991 parameter, this parameter is now mandatory (that is, NULL is not an 992 acceptable value). Functions which previously accepted NULL and now 993 reject it are: the X.509 CRT and CSR writing functions; the PK and RSA 994 sign and decrypt function; mbedtls_rsa_private(); the functions 995 in DHM and ECDH that compute the shared secret; the scalar multiplication 996 functions in ECP. 997 * The following functions now require an RNG parameter: 998 mbedtls_ecp_check_pub_priv(), mbedtls_pk_check_pair(), 999 mbedtls_pk_parse_key(), mbedtls_pk_parse_keyfile(). 1000 * mbedtls_ssl_conf_export_keys_ext_cb() and 1001 mbedtls_ssl_conf_export_keys_cb() have been removed and 1002 replaced by a new API mbedtls_ssl_set_export_keys_cb(). 1003 Raw keys and IVs are no longer passed to the callback. 1004 Further, callbacks now receive an additional parameter 1005 indicating the type of secret that's being exported, 1006 paving the way for the larger number of secrets 1007 in TLS 1.3. Finally, the key export callback and 1008 context are now connection-specific. 1009 * Signature functions in the RSA and PK modules now require the hash 1010 length parameter to be the size of the hash input. For RSA signatures 1011 other than raw PKCS#1 v1.5, this must match the output size of the 1012 specified hash algorithm. 1013 * The functions mbedtls_pk_sign(), mbedtls_pk_sign_restartable(), 1014 mbedtls_ecdsa_write_signature() and 1015 mbedtls_ecdsa_write_signature_restartable() now take an extra parameter 1016 indicating the size of the output buffer for the signature. 1017 * Implement one-shot cipher functions, psa_cipher_encrypt and 1018 psa_cipher_decrypt, according to the PSA Crypto API 1.0.0 1019 specification. 1020 * Direct access to fields of structures declared in public headers is no 1021 longer supported except for fields that are documented public. Use accessor 1022 functions instead. For more information, see the migration guide entry 1023 "Most structure fields are now private". 1024 * mbedtls_ssl_get_session_pointer() has been removed, and 1025 mbedtls_ssl_{set,get}_session() may now only be called once for any given 1026 SSL context. 1027 1028Default behavior changes 1029 * Enable by default the functionalities which have no reason to be disabled. 1030 They are: ARIA block cipher, CMAC mode, elliptic curve J-PAKE library and 1031 Key Wrapping mode as defined in NIST SP 800-38F. Fixes #4036. 1032 * Some default policies for X.509 certificate verification and TLS have 1033 changed: curves and hashes weaker than 255 bits are no longer accepted 1034 by default. The default order in TLS now favors faster curves over larger 1035 curves. 1036 1037Requirement changes 1038 * The library now uses the %zu format specifier with the printf() family of 1039 functions, so requires a toolchain that supports it. This change does not 1040 affect the maintained LTS branches, so when contributing changes please 1041 bear this in mind and do not add them to backported code. 1042 * If you build the development version of Mbed TLS, rather than an official 1043 release, some configuration-independent files are now generated at build 1044 time rather than checked into source control. This includes some library 1045 source files as well as the Visual Studio solution. Perl, Python 3 and a 1046 C compiler for the host platform are required. See “Generated source files 1047 in the development branch” in README.md for more information. 1048 * Refresh the minimum supported versions of tools to build the 1049 library. CMake versions older than 3.10.2 and Python older 1050 than 3.6 are no longer supported. 1051 1052Removals 1053 * Remove the MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES 1054 compile-time option, which was off by default. Users should not trust 1055 certificates signed with SHA-1 due to the known attacks against SHA-1. 1056 If needed, SHA-1 certificates can still be verified by using a custom 1057 verification profile. 1058 * Removed deprecated things in psa/crypto_compat.h. Fixes #4284 1059 * Removed deprecated functions from hashing modules. Fixes #4280. 1060 * Remove PKCS#11 library wrapper. PKCS#11 has limited functionality, 1061 lacks automated tests and has scarce documentation. Also, PSA Crypto 1062 provides a more flexible private key management. 1063 More details on PCKS#11 wrapper removal can be found in the mailing list 1064 https://lists.trustedfirmware.org/pipermail/mbed-tls/2020-April/000024.html 1065 * Remove deprecated error codes. Fix #4283 1066 * Remove MBEDTLS_ENABLE_WEAK_CIPHERSUITES configuration option. Fixes #4416. 1067 * Remove the MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES 1068 compile-time option. This option has been inactive for a long time. 1069 Please use the `lifetime` parameter of `mbedtls_ssl_ticket_setup()` 1070 instead. 1071 * Remove the following deprecated functions and constants of hex-encoded 1072 primes based on RFC 5114 and RFC 3526 from library code and tests: 1073 mbedtls_aes_encrypt(), mbedtls_aes_decrypt(), mbedtls_mpi_is_prime(), 1074 mbedtls_cipher_auth_encrypt(), mbedtls_cipher_auth_decrypt(), 1075 mbedtls_ctr_drbg_update(), mbedtls_hmac_drbg_update(), 1076 mbedtls_ecdsa_write_signature_det(), mbedtls_ecdsa_sign_det(), 1077 mbedtls_ssl_conf_dh_param(), mbedtls_ssl_get_max_frag_len(), 1078 MBEDTLS_DHM_RFC5114_MODP_2048_P, MBEDTLS_DHM_RFC5114_MODP_2048_G, 1079 MBEDTLS_DHM_RFC3526_MODP_2048_P, MBEDTLS_DHM_RFC3526_MODP_2048_G, 1080 MBEDTLS_DHM_RFC3526_MODP_3072_P, MBEDTLS_DHM_RFC3526_MODP_3072_G, 1081 MBEDTLS_DHM_RFC3526_MODP_4096_P, MBEDTLS_DHM_RFC3526_MODP_4096_G. 1082 Remove the deprecated file: include/mbedtls/net.h. Fixes #4282. 1083 * Remove MBEDTLS_SSL_MAX_CONTENT_LEN configuration option, since 1084 MBEDTLS_SSL_IN_CONTENT_LEN and MBEDTLS_SSL_OUT_CONTENT_LEN replace 1085 it. Fixes #4362. 1086 * Remove the MBEDTLS_SSL_RECORD_CHECKING option and enable by default its 1087 previous action. Fixes #4361. 1088 * Remove support for TLS 1.0, TLS 1.1 and DTLS 1.0, as well as support for 1089 CBC record splitting, fallback SCSV, and the ability to configure 1090 ciphersuites per version, which are no longer relevant. This removes the 1091 configuration options MBEDTLS_SSL_PROTO_TLS1, 1092 MBEDTLS_SSL_PROTO_TLS1_1, MBEDTLS_SSL_CBC_RECORD_SPLITTING and 1093 MBEDTLS_SSL_FALLBACK_SCSV as well as the functions 1094 mbedtls_ssl_conf_cbc_record_splitting(), 1095 mbedtls_ssl_get_key_exchange_md_ssl_tls(), mbedtls_ssl_conf_fallback(), 1096 and mbedtls_ssl_conf_ciphersuites_for_version(). Fixes #4286. 1097 * The RSA module no longer supports private-key operations with the public 1098 key and vice versa. 1099 * Remove the MBEDTLS_SSL_DTLS_BADMAC_LIMIT config.h option. Fixes #4403. 1100 * Remove all the 3DES ciphersuites: 1101 MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA, 1102 MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, 1103 MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, 1104 MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA, 1105 MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, 1106 MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, 1107 MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA, 1108 MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA, 1109 MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA. Remove the 1110 MBEDTLS_REMOVE_3DES_CIPHERSUITES option which is no longer relevant. 1111 Fixes #4367. 1112 * Remove the MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3 option and let the code 1113 behave as if it was always disabled. Fixes #4386. 1114 * Remove MBEDTLS_ECDH_LEGACY_CONTEXT config option since this was purely for 1115 backward compatibility which is no longer supported. Addresses #4404. 1116 * Remove the following macros: MBEDTLS_CHECK_PARAMS, 1117 MBEDTLS_CHECK_PARAMS_ASSERT, MBEDTLS_PARAM_FAILED, 1118 MBEDTLS_PARAM_FAILED_ALT. Fixes #4313. 1119 * Remove the MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION config.h 1120 option. The mbedtls_x509_crt_parse_der_with_ext_cb() is the way to go for 1121 migration path. Fixes #4378. 1122 * Remove the MBEDTLS_X509_CHECK_KEY_USAGE and 1123 MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE config.h options and let the code 1124 behave as if they were always enabled. Fixes #4405. 1125 * MBEDTLS_ECP_MAX_BITS is no longer a configuration option because it is 1126 now determined automatically based on supported curves. 1127 * Remove the following functions: mbedtls_timing_self_test(), 1128 mbedtls_hardclock_poll(), mbedtls_timing_hardclock() and 1129 mbedtls_set_alarm(). Fixes #4083. 1130 * The configuration option MBEDTLS_ECP_NO_INTERNAL_RNG has been removed as 1131 it no longer had any effect. 1132 * Remove all support for MD2, MD4, RC4, Blowfish and XTEA. This removes the 1133 corresponding modules and all their APIs and related configuration 1134 options. Fixes #4084. 1135 * Remove MBEDTLS_SSL_TRUNCATED_HMAC and also remove 1136 MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT config option. Users are better served by 1137 using a CCM-8 ciphersuite than a CBC ciphersuite with truncated HMAC. 1138 See issue #4341 for more details. 1139 * Remove the compile-time option 1140 MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE. 1141 1142Features 1143 * Add mbedtls_rsa_rsassa_pss_sign_ext() function allowing to generate a 1144 signature with a specific salt length. This function allows to validate 1145 test cases provided in the NIST's CAVP test suite. Contributed by Cédric 1146 Meuter in PR #3183. 1147 * Added support for built-in driver keys through the PSA opaque crypto 1148 driver interface. Refer to the documentation of 1149 MBEDTLS_PSA_CRYPTO_BUILTIN_KEYS for more information. 1150 * Implement psa_sign_message() and psa_verify_message(). 1151 * The multi-part GCM interface (mbedtls_gcm_update() or 1152 mbedtls_cipher_update()) no longer requires the size of partial inputs to 1153 be a multiple of 16. 1154 * The multi-part GCM interface now supports chunked associated data through 1155 multiple calls to mbedtls_gcm_update_ad(). 1156 * The new function mbedtls_mpi_random() generates a random value in a 1157 given range uniformly. 1158 * Alternative implementations of the AES, DHM, ECJPAKE, ECP, RSA and timing 1159 modules had undocumented constraints on their context types. These 1160 constraints have been relaxed. 1161 See docs/architecture/alternative-implementations.md for the remaining 1162 constraints. 1163 * The new functions mbedtls_dhm_get_len() and mbedtls_dhm_get_bitlen() 1164 query the size of the modulus in a Diffie-Hellman context. 1165 * The new function mbedtls_dhm_get_value() copy a field out of a 1166 Diffie-Hellman context. 1167 * Use the new function mbedtls_ecjpake_set_point_format() to select the 1168 point format for ECJPAKE instead of accessing the point_format field 1169 directly, which is no longer supported. 1170 * Implement psa_mac_compute() and psa_mac_verify() as defined in the 1171 PSA Cryptograpy API 1.0.0 specification. 1172 1173Security 1174 * Fix a bias in the generation of finite-field Diffie-Hellman-Merkle (DHM) 1175 private keys and of blinding values for DHM and elliptic curves (ECP) 1176 computations. Reported by FlorianF89 in #4245. 1177 * Fix a potential side channel vulnerability in ECDSA ephemeral key generation. 1178 An adversary who is capable of very precise timing measurements could 1179 learn partial information about the leading bits of the nonce used for the 1180 signature, allowing the recovery of the private key after observing a 1181 large number of signature operations. This completes a partial fix in 1182 Mbed TLS 2.20.0. 1183 * Fix an issue where an adversary with access to precise enough information 1184 about memory accesses (typically, an untrusted operating system attacking 1185 a secure enclave) could recover an RSA private key after observing the 1186 victim performing a single private-key operation. Found and reported by 1187 Zili KOU, Wenjian HE, Sharad Sinha, and Wei ZHANG. 1188 * Fix an issue where an adversary with access to precise enough timing 1189 information (typically, a co-located process) could recover a Curve25519 1190 or Curve448 static ECDH key after inputting a chosen public key and 1191 observing the victim performing the corresponding private-key operation. 1192 Found and reported by Leila Batina, Lukas Chmielewski, Björn Haase, Niels 1193 Samwel and Peter Schwabe. 1194 1195Bugfix 1196 * Fix premature fopen() call in mbedtls_entropy_write_seed_file which may 1197 lead to the seed file corruption in case if the path to the seed file is 1198 equal to MBEDTLS_PLATFORM_STD_NV_SEED_FILE. Contributed by Victor 1199 Krasnoshchok in #3616. 1200 * PSA functions creating a key now return PSA_ERROR_INVALID_ARGUMENT rather 1201 than PSA_ERROR_INVALID_HANDLE when the identifier specified for the key 1202 to create is not valid, bringing them in line with version 1.0.0 of the 1203 specification. Fix #4271. 1204 * Add printf function attributes to mbedtls_debug_print_msg to ensure we 1205 get printf format specifier warnings. 1206 * PSA functions other than psa_open_key now return PSA_ERROR_INVALID_HANDLE 1207 rather than PSA_ERROR_DOES_NOT_EXIST for an invalid handle, bringing them 1208 in line with version 1.0.0 of the specification. Fix #4162. 1209 * Fix a bug in ECDSA that would cause it to fail when the hash is all-bits 1210 zero. Fixes #1792 1211 * Fix some cases in the bignum module where the library constructed an 1212 unintended representation of the value 0 which was not processed 1213 correctly by some bignum operations. This could happen when 1214 mbedtls_mpi_read_string() was called on "-0", or when 1215 mbedtls_mpi_mul_mpi() and mbedtls_mpi_mul_int() was called with one of 1216 the arguments being negative and the other being 0. Fixes #4643. 1217 * Fix a compilation error when MBEDTLS_ECP_RANDOMIZE_MXZ_ALT is 1218 defined. Fixes #4217. 1219 * Fix an incorrect error code when parsing a PKCS#8 private key. 1220 * In a TLS client, enforce the Diffie-Hellman minimum parameter size 1221 set with mbedtls_ssl_conf_dhm_min_bitlen() precisely. Before, the 1222 minimum size was rounded down to the nearest multiple of 8. 1223 * In library/net_sockets.c, _POSIX_C_SOURCE and _XOPEN_SOURCE are 1224 defined to specific values. If the code is used in a context 1225 where these are already defined, this can result in a compilation 1226 error. Instead, assume that if they are defined, the values will 1227 be adequate to build Mbed TLS. 1228 * With MBEDTLS_PSA_CRYPTO_C disabled, some functions were getting built 1229 nonetheless, resulting in undefined reference errors when building a 1230 shared library. Reported by Guillermo Garcia M. in #4411. 1231 * The cipher suite TLS-RSA-WITH-CAMELLIA-256-GCM-SHA384 was not available 1232 when SHA-1 was disabled and was offered when SHA-1 was enabled but SHA-384 1233 was disabled. Fix the dependency. Fixes #4472. 1234 * Do not offer SHA384 cipher suites when SHA-384 is disabled. Fixes #4499. 1235 * Fix test suite code on platforms where int32_t is not int, such as 1236 Arm Cortex-M. Fixes #4530. 1237 * Fix some issues affecting MBEDTLS_ARIA_ALT implementations: a misplaced 1238 directive in a header and a missing initialization in the self-test. 1239 * Fix a missing initialization in the Camellia self-test, affecting 1240 MBEDTLS_CAMELLIA_ALT implementations. 1241 * Restore the ability to configure PSA via Mbed TLS options to support RSA 1242 key pair operations but exclude RSA key generation. When MBEDTLS_GENPRIME 1243 is not defined PSA will no longer attempt to use mbedtls_rsa_gen_key(). 1244 Fixes #4512. 1245 * Fix a regression introduced in 2.24.0 which broke (D)TLS CBC ciphersuites 1246 (when the encrypt-then-MAC extension is not in use) with some ALT 1247 implementations of the underlying hash (SHA-1, SHA-256, SHA-384), causing 1248 the affected side to wrongly reject valid messages. Fixes #4118. 1249 * Remove outdated check-config.h check that prevented implementing the 1250 timing module on Mbed OS. Fixes #4633. 1251 * Fix PSA_ALG_TLS12_PRF and PSA_ALG_TLS12_PSK_TO_MS being too permissive 1252 about missing inputs. 1253 * Fix mbedtls_net_poll() and mbedtls_net_recv_timeout() often failing with 1254 MBEDTLS_ERR_NET_POLL_FAILED on Windows. Fixes #4465. 1255 * Fix a resource leak in a test suite with an alternative AES 1256 implementation. Fixes #4176. 1257 * Fix a crash in mbedtls_mpi_debug_mpi on a bignum having 0 limbs. This 1258 could notably be triggered by setting the TLS debug level to 3 or above 1259 and using a Montgomery curve for the key exchange. Reported by lhuang04 1260 in #4578. Fixes #4608. 1261 * psa_verify_hash() was relying on implementation-specific behavior of 1262 mbedtls_rsa_rsassa_pss_verify() and was causing failures in some _ALT 1263 implementations. This reliance is now removed. Fixes #3990. 1264 * Disallow inputs of length different from the corresponding hash when 1265 signing or verifying with PSA_ALG_RSA_PSS (The PSA Crypto API mandates 1266 that PSA_ALG_RSA_PSS uses the same hash throughout the algorithm.) 1267 * Fix a null pointer dereference when mbedtls_mpi_exp_mod() was called with 1268 A=0 represented with 0 limbs. Up to and including Mbed TLS 2.26, this bug 1269 could not be triggered by code that constructed A with one of the 1270 mbedtls_mpi_read_xxx functions (including in particular TLS code) since 1271 those always built an mpi object with at least one limb. 1272 Credit to OSS-Fuzz. Fixes #4641. 1273 * Fix mbedtls_mpi_gcd(G,A,B) when the value of B is zero. This had no 1274 effect on Mbed TLS's internal use of mbedtls_mpi_gcd(), but may affect 1275 applications that call mbedtls_mpi_gcd() directly. Fixes #4642. 1276 * The PSA API no longer allows the creation or destruction of keys with a 1277 read-only lifetime. The persistence level PSA_KEY_PERSISTENCE_READ_ONLY 1278 can now only be used as intended, for keys that cannot be modified through 1279 normal use of the API. 1280 * When MBEDTLS_PSA_CRYPTO_SPM is enabled, crypto_spe.h was not included 1281 in all the right places. Include it from crypto_platform.h, which is 1282 the natural place. Fixes #4649. 1283 * Fix which alert is sent in some cases to conform to the 1284 applicable RFC: on an invalid Finished message value, an 1285 invalid max_fragment_length extension, or an 1286 unsupported extension used by the server. 1287 * Correct (change from 12 to 13 bytes) the value of the macro describing the 1288 maximum nonce length returned by psa_aead_generate_nonce(). 1289 1290Changes 1291 * Fix the setting of the read timeout in the DTLS sample programs. 1292 * Add extra printf compiler warning flags to builds. 1293 * Fix memsan build false positive in x509_crt.c with clang 11 1294 * Alternative implementations of CMAC may now opt to not support 3DES as a 1295 CMAC block cipher, and still pass the CMAC self test. 1296 * Remove the AES sample application programs/aes/aescrypt2 which shows 1297 bad cryptographic practice. Fix #1906. 1298 * Remove configs/config-psa-crypto.h, which no longer had any intended 1299 differences from the default configuration, but had accidentally diverged. 1300 * When building the test suites with GNU make, invoke python3 or python, not 1301 python2, which is no longer supported upstream. 1302 * fix build failure on MinGW toolchain when __USE_MING_ANSI_STDIO is on. 1303 When that flag is on, standard GNU C printf format specifiers 1304 should be used. 1305 * Replace MBEDTLS_SSL_CID_PADDING_GRANULARITY and 1306 MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY with a new single unified option 1307 MBEDTLS_SSL_CID_TLS1_3_PADDING_GRANULARITY. Fixes #4335. 1308 * Reduce the default value of MBEDTLS_ECP_WINDOW_SIZE. This reduces RAM usage 1309 during ECC operations at a negligible performance cost. 1310 * mbedtls_mpi_read_binary(), mbedtls_mpi_read_binary_le() and 1311 mbedtls_mpi_read_string() now construct an mbedtls_mpi object with 0 limbs 1312 when their input has length 0. Note that this is an implementation detail 1313 and can change at any time, so this change should be transparent, but it 1314 may result in mbedtls_mpi_write_binary() or mbedtls_mpi_write_string() 1315 now writing an empty string where it previously wrote one or more 1316 zero digits when operating from values constructed with an mpi_read 1317 function and some mpi operations. 1318 * Add CMake package config generation for CMake projects consuming Mbed TLS. 1319 * config.h has been split into build_info.h and mbedtls_config.h 1320 build_info.h is intended to be included from C code directly, while 1321 mbedtls_config.h is intended to be edited by end users wishing to 1322 change the build configuration, and should generally only be included from 1323 build_info.h. 1324 * The handling of MBEDTLS_CONFIG_FILE has been moved into build_info.h. 1325 * A config file version symbol, MBEDTLS_CONFIG_VERSION was introduced. 1326 Defining it to a particular value will ensure that Mbed TLS interprets 1327 the config file in a way that's compatible with the config file format 1328 used by the Mbed TLS release whose MBEDTLS_VERSION_NUMBER has the same 1329 value. 1330 The only value supported by Mbed TLS 3.0.0 is 0x03000000. 1331 * Various changes to which alert and/or error code may be returned 1332 * during the TLS handshake. 1333 * Implicitly add PSA_KEY_USAGE_SIGN_MESSAGE key usage policy flag when 1334 PSA_KEY_USAGE_SIGN_HASH flag is set and PSA_KEY_USAGE_VERIFY_MESSAGE flag 1335 when PSA_KEY_USAGE_VERIFY_HASH flag is set. This usage flag extension 1336 is also applied when loading a key from storage. 1337 1338= mbed TLS 2.26.0 branch released 2021-03-08 1339 1340API changes 1341 * Renamed the PSA Crypto API output buffer size macros to bring them in line 1342 with version 1.0.0 of the specification. 1343 * The API glue function mbedtls_ecc_group_of_psa() now takes the curve size 1344 in bits rather than bytes, with an additional flag to indicate if the 1345 size may have been rounded up to a whole number of bytes. 1346 * Renamed the PSA Crypto API AEAD tag length macros to bring them in line 1347 with version 1.0.0 of the specification. 1348 1349Default behavior changes 1350 * In mbedtls_rsa_context objects, the ver field was formerly documented 1351 as always 0. It is now reserved for internal purposes and may take 1352 different values. 1353 1354New deprecations 1355 * PSA_KEY_EXPORT_MAX_SIZE, PSA_HASH_SIZE, PSA_MAC_FINAL_SIZE, 1356 PSA_BLOCK_CIPHER_BLOCK_SIZE, PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE and 1357 PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN have been renamed, and the old names 1358 deprecated. 1359 * PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH and PSA_ALG_AEAD_WITH_TAG_LENGTH 1360 have been renamed, and the old names deprecated. 1361 1362Features 1363 * The PSA crypto subsystem can now use HMAC_DRBG instead of CTR_DRBG. 1364 CTR_DRBG is used by default if it is available, but you can override 1365 this choice by setting MBEDTLS_PSA_HMAC_DRBG_MD_TYPE at compile time. 1366 Fix #3354. 1367 * Automatic fallback to a software implementation of ECP when 1368 MBEDTLS_ECP_xxx_ALT accelerator hooks are in use can now be turned off 1369 through setting the new configuration flag MBEDTLS_ECP_NO_FALLBACK. 1370 * The PSA crypto subsystem can now be configured to use less static RAM by 1371 tweaking the setting for the maximum amount of keys simultaneously in RAM. 1372 MBEDTLS_PSA_KEY_SLOT_COUNT sets the maximum number of volatile keys that 1373 can exist simultaneously. It has a sensible default if not overridden. 1374 * Partial implementation of the PSA crypto driver interface: Mbed TLS can 1375 now use an external random generator instead of the library's own 1376 entropy collection and DRBG code. Enable MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG 1377 and see the documentation of mbedtls_psa_external_get_random() for details. 1378 * Applications using both mbedtls_xxx and psa_xxx functions (for example, 1379 applications using TLS and MBEDTLS_USE_PSA_CRYPTO) can now use the PSA 1380 random generator with mbedtls_xxx functions. See the documentation of 1381 mbedtls_psa_get_random() for details. 1382 * In the PSA API, the policy for a MAC or AEAD algorithm can specify a 1383 minimum MAC or tag length thanks to the new wildcards 1384 PSA_ALG_AT_LEAST_THIS_LENGTH_MAC and 1385 PSA_ALG_AEAD_WITH_AT_LEAST_THIS_LENGTH_TAG. 1386 1387Security 1388 * Fix a security reduction in CTR_DRBG when the initial seeding obtained a 1389 nonce from entropy. Applications were affected if they called 1390 mbedtls_ctr_drbg_set_nonce_len(), if they called 1391 mbedtls_ctr_drbg_set_entropy_len() with a size that was 3/2 times the key 1392 length, or when the entropy module uses SHA-256 and CTR_DRBG uses AES-256. 1393 In such cases, a random nonce was necessary to achieve the advertised 1394 security strength, but the code incorrectly used a constant instead of 1395 entropy from the nonce. 1396 Found by John Stroebel in #3819 and fixed in #3973. 1397 * Fix a buffer overflow in mbedtls_mpi_sub_abs() when calculating 1398 |A| - |B| where |B| is larger than |A| and has more limbs (so the 1399 function should return MBEDTLS_ERR_MPI_NEGATIVE_VALUE). Only 1400 applications calling mbedtls_mpi_sub_abs() directly are affected: 1401 all calls inside the library were safe since this function is 1402 only called with |A| >= |B|. Reported by Guido Vranken in #4042. 1403 * Fix an errorneous estimation for an internal buffer in 1404 mbedtls_pk_write_key_pem(). If MBEDTLS_MPI_MAX_SIZE is set to an odd 1405 value the function might fail to write a private RSA keys of the largest 1406 supported size. 1407 Found by Daniel Otte, reported in #4093 and fixed in #4094. 1408 * Fix a stack buffer overflow with mbedtls_net_poll() and 1409 mbedtls_net_recv_timeout() when given a file descriptor that is 1410 beyond FD_SETSIZE. Reported by FigBug in #4169. 1411 * Guard against strong local side channel attack against base64 tables by 1412 making access aceess to them use constant flow code. 1413 1414Bugfix 1415 * Fix use-after-scope error in programs/ssl/ssl_client2.c and ssl_server2.c 1416 * Fix memory leak that occured when calling psa_close_key() on a 1417 wrapped key with MBEDTLS_PSA_CRYPTO_SE_C defined. 1418 * Fix an incorrect error code if an RSA private operation glitched. 1419 * Fix a memory leak in an error case in psa_generate_derived_key_internal(). 1420 * Fix a resource leak in CTR_DRBG and HMAC_DRBG when MBEDTLS_THREADING_C 1421 is enabled, on platforms where initializing a mutex allocates resources. 1422 This was a regression introduced in the previous release. Reported in 1423 #4017, #4045 and #4071. 1424 * Ensure that calling mbedtls_rsa_free() or mbedtls_entropy_free() 1425 twice is safe. This happens for RSA when some Mbed TLS library functions 1426 fail. Such a double-free was not safe when MBEDTLS_THREADING_C was 1427 enabled on platforms where freeing a mutex twice is not safe. 1428 * Fix a resource leak in a bad-arguments case of mbedtls_rsa_gen_key() 1429 when MBEDTLS_THREADING_C is enabled on platforms where initializing 1430 a mutex allocates resources. 1431 * Fixes a bug where, if the library was configured to include support for 1432 both the old SE interface and the new PSA driver interface, external keys were 1433 not loaded from storage. This was fixed by #3996. 1434 * This change makes 'mbedtls_x509write_crt_set_basic_constraints' 1435 consistent with RFC 5280 4.2.1.9 which says: "Conforming CAs MUST 1436 include this extension in all CA certificates that contain public keys 1437 used to validate digital signatures on certificates and MUST mark the 1438 extension as critical in such certificates." Previous to this change, 1439 the extension was always marked as non-critical. This was fixed by 1440 #3698. 1441 1442Changes 1443 * A new library C file psa_crypto_client.c has been created to contain 1444 the PSA code needed by a PSA crypto client when the PSA crypto 1445 implementation is not included into the library. 1446 * On recent enough versions of FreeBSD and DragonFlyBSD, the entropy module 1447 now uses the getrandom syscall instead of reading from /dev/urandom. 1448 1449= mbed TLS 2.25.0 branch released 2020-12-11 1450 1451API changes 1452 * The numerical values of the PSA Crypto API macros have been updated to 1453 conform to version 1.0.0 of the specification. 1454 * PSA_ALG_STREAM_CIPHER replaces PSA_ALG_CHACHA20 and PSA_ALG_ARC4. 1455 The underlying stream cipher is determined by the key type 1456 (PSA_KEY_TYPE_CHACHA20 or PSA_KEY_TYPE_ARC4). 1457 * The functions mbedtls_cipher_auth_encrypt() and 1458 mbedtls_cipher_auth_decrypt() no longer accept NIST_KW contexts, 1459 as they have no way to check if the output buffer is large enough. 1460 Please use mbedtls_cipher_auth_encrypt_ext() and 1461 mbedtls_cipher_auth_decrypt_ext() instead. Credit to OSS-Fuzz and 1462 Cryptofuzz. Fixes #3665. 1463 1464Requirement changes 1465 * Update the minimum required CMake version to 2.8.12. This silences a 1466 warning on CMake 3.19.0. #3801 1467 1468New deprecations 1469 * PSA_ALG_CHACHA20 and PSA_ALG_ARC4 have been deprecated. 1470 Use PSA_ALG_STREAM_CIPHER instead. 1471 * The functions mbedtls_cipher_auth_encrypt() and 1472 mbedtls_cipher_auth_decrypt() are deprecated in favour of the new 1473 functions mbedtls_cipher_auth_encrypt_ext() and 1474 mbedtls_cipher_auth_decrypt_ext(). Please note that with AEAD ciphers, 1475 these new functions always append the tag to the ciphertext, and include 1476 the tag in the ciphertext length. 1477 1478Features 1479 * Partial implementation of the new PSA Crypto accelerator APIs. (Symmetric 1480 ciphers, asymmetric signing/verification and key generation, validate_key 1481 entry point, and export_public_key interface.) 1482 * Add support for ECB to the PSA cipher API. 1483 * In PSA, allow using a key declared with a base key agreement algorithm 1484 in combined key agreement and derivation operations, as long as the key 1485 agreement algorithm in use matches the algorithm the key was declared with. 1486 This is currently non-standard behaviour, but expected to make it into a 1487 future revision of the PSA Crypto standard. 1488 * Add MBEDTLS_TARGET_PREFIX CMake variable, which is prefixed to the mbedtls, 1489 mbedcrypto, mbedx509 and apidoc CMake target names. This can be used by 1490 external CMake projects that include this one to avoid CMake target name 1491 clashes. The default value of this variable is "", so default target names 1492 are unchanged. 1493 * Add support for DTLS-SRTP as defined in RFC 5764. Contributed by Johan 1494 Pascal, improved by Ron Eldor. 1495 * In the PSA API, it is no longer necessary to open persistent keys: 1496 operations now accept the key identifier. The type psa_key_handle_t is now 1497 identical to psa_key_id_t instead of being platform-defined. This bridges 1498 the last major gap to compliance with the PSA Cryptography specification 1499 version 1.0.0. Opening persistent keys is still supported for backward 1500 compatibility, but will be deprecated and later removed in future 1501 releases. 1502 * PSA_AEAD_NONCE_LENGTH, PSA_AEAD_NONCE_MAX_SIZE, PSA_CIPHER_IV_LENGTH and 1503 PSA_CIPHER_IV_MAX_SIZE macros have been added as defined in version 1504 1.0.0 of the PSA Crypto API specification. 1505 1506Security 1507 * The functions mbedtls_cipher_auth_encrypt() and 1508 mbedtls_cipher_auth_decrypt() would write past the minimum documented 1509 size of the output buffer when used with NIST_KW. As a result, code using 1510 those functions as documented with NIST_KW could have a buffer overwrite 1511 of up to 15 bytes, with consequences ranging up to arbitrary code 1512 execution depending on the location of the output buffer. 1513 * Limit the size of calculations performed by mbedtls_mpi_exp_mod to 1514 MBEDTLS_MPI_MAX_SIZE to prevent a potential denial of service when 1515 generating Diffie-Hellman key pairs. Credit to OSS-Fuzz. 1516 * A failure of the random generator was ignored in mbedtls_mpi_fill_random(), 1517 which is how most uses of randomization in asymmetric cryptography 1518 (including key generation, intermediate value randomization and blinding) 1519 are implemented. This could cause failures or the silent use of non-random 1520 values. A random generator can fail if it needs reseeding and cannot not 1521 obtain entropy, or due to an internal failure (which, for Mbed TLS's own 1522 CTR_DRBG or HMAC_DRBG, can only happen due to a misconfiguration). 1523 * Fix a compliance issue whereby we were not checking the tag on the 1524 algorithm parameters (only the size) when comparing the signature in the 1525 description part of the cert to the real signature. This meant that a 1526 NULL algorithm parameters entry would look identical to an array of REAL 1527 (size zero) to the library and thus the certificate would be considered 1528 valid. However, if the parameters do not match in *any* way then the 1529 certificate should be considered invalid, and indeed OpenSSL marks these 1530 certs as invalid when mbedtls did not. 1531 Many thanks to guidovranken who found this issue via differential fuzzing 1532 and reported it in #3629. 1533 * Zeroising of local buffers and variables which are used for calculations 1534 in mbedtls_pkcs5_pbkdf2_hmac(), mbedtls_internal_sha*_process(), 1535 mbedtls_internal_md*_process() and mbedtls_internal_ripemd160_process() 1536 functions to erase sensitive data from memory. Reported by 1537 Johan Malmgren and Johan Uppman Bruce from Sectra. 1538 1539Bugfix 1540 * Fix an invalid (but nonzero) return code from mbedtls_pk_parse_subpubkey() 1541 when the input has trailing garbage. Fixes #2512. 1542 * Fix build failure in configurations where MBEDTLS_USE_PSA_CRYPTO is 1543 enabled but ECDSA is disabled. Contributed by jdurkop. Fixes #3294. 1544 * Include the psa_constant_names generated source code in the source tree 1545 instead of generating it at build time. Fixes #3524. 1546 * Fix rsa_prepare_blinding() to retry when the blinding value is not 1547 invertible (mod N), instead of returning MBEDTLS_ERR_RSA_RNG_FAILED. This 1548 addresses a regression but is rare in practice (approx. 1 in 2/sqrt(N)). 1549 Found by Synopsys Coverity, fix contributed by Peter Kolbus (Garmin). 1550 Fixes #3647. 1551 * Use socklen_t on Android and other POSIX-compliant system 1552 * Fix the build when the macro _GNU_SOURCE is defined to a non-empty value. 1553 Fix #3432. 1554 * Consistently return PSA_ERROR_INVALID_ARGUMENT on invalid cipher input 1555 sizes (instead of PSA_ERROR_BAD_STATE in some cases) to make the 1556 psa_cipher_* functions compliant with the PSA Crypto API specification. 1557 * mbedtls_ecp_curve_list() now lists Curve25519 and Curve448 under the names 1558 "x25519" and "x448". These curves support ECDH but not ECDSA. If you need 1559 only the curves that support ECDSA, filter the list with 1560 mbedtls_ecdsa_can_do(). 1561 * Fix psa_generate_key() returning an error when asked to generate 1562 an ECC key pair on Curve25519 or secp244k1. 1563 * Fix psa_key_derivation_output_key() to allow the output of a combined key 1564 agreement and subsequent key derivation operation to be used as a key 1565 inside of the PSA Crypto core. 1566 * Fix handling of EOF against 0xff bytes and on platforms with unsigned 1567 chars. Fixes a build failure on platforms where char is unsigned. Fixes 1568 #3794. 1569 * Fix an off-by-one error in the additional data length check for 1570 CCM, which allowed encryption with a non-standard length field. 1571 Fixes #3719. 1572 * Correct the default IV size for mbedtls_cipher_info_t structures using 1573 MBEDTLS_MODE_ECB to 0, since ECB mode ciphers don't use IVs. 1574 * Make arc4random_buf available on NetBSD and OpenBSD when _POSIX_C_SOURCE is 1575 defined. Fix contributed in #3571. 1576 * Fix conditions for including string.h in error.c. Fixes #3866. 1577 * psa_set_key_id() now also sets the lifetime to persistent for keys located 1578 in a secure element. 1579 * Attempting to create a volatile key with a non-zero key identifier now 1580 fails. Previously the key identifier was just ignored when creating a 1581 volatile key. 1582 * Attempting to create or register a key with a key identifier in the vendor 1583 range now fails. 1584 * Fix build failures on GCC 11. Fixes #3782. 1585 * Add missing arguments of debug message in mbedtls_ssl_decrypt_buf. 1586 * Fix a memory leak in mbedtls_mpi_sub_abs() when the result was negative 1587 (an error condition) and the second operand was aliased to the result. 1588 * Fix a case in elliptic curve arithmetic where an out-of-memory condition 1589 could go undetected, resulting in an incorrect result. 1590 * In CTR_DRBG and HMAC_DRBG, don't reset the reseed interval in seed(). 1591 Fixes #2927. 1592 * In PEM writing functions, fill the trailing part of the buffer with null 1593 bytes. This guarantees that the corresponding parsing function can read 1594 the buffer back, which was the case for mbedtls_x509write_{crt,csr}_pem 1595 until this property was inadvertently broken in Mbed TLS 2.19.0. 1596 Fixes #3682. 1597 * Fix a build failure that occurred with the MBEDTLS_AES_SETKEY_DEC_ALT 1598 option on. In this configuration key management methods that are required 1599 for MBEDTLS_CIPHER_MODE_XTS were excluded from the build and made it fail. 1600 Fixes #3818. Reported by John Stroebel. 1601 1602Changes 1603 * Reduce stack usage significantly during sliding window exponentiation. 1604 Reported in #3591 and fix contributed in #3592 by Daniel Otte. 1605 * The PSA persistent storage format is updated to always store the key bits 1606 attribute. No automatic upgrade path is provided. Previously stored keys 1607 must be erased, or manually upgraded based on the key storage format 1608 specification (docs/architecture/mbed-crypto-storage-specification.md). 1609 Fixes #3740. 1610 * Remove the zeroization of a pointer variable in AES rounds. It was valid 1611 but spurious and misleading since it looked like a mistaken attempt to 1612 zeroize the pointed-to buffer. Reported by Antonio de la Piedra, CEA 1613 Leti, France. 1614 1615= mbed TLS 2.24.0 branch released 2020-09-01 1616 1617API changes 1618 * In the PSA API, rename the types of elliptic curve and Diffie-Hellman 1619 group families to psa_ecc_family_t and psa_dh_family_t, in line with the 1620 PSA Crypto API specification version 1.0.0. 1621 Rename associated macros as well: 1622 PSA_ECC_CURVE_xxx renamed to PSA_ECC_FAMILY_xxx 1623 PSA_DH_GROUP_xxx renamed to PSA_DH_FAMILY_xxx 1624 PSA_KEY_TYPE_GET_CURVE renamed to to PSA_KEY_TYPE_ECC_GET_FAMILY 1625 PSA_KEY_TYPE_GET_GROUP renamed to PSA_KEY_TYPE_DH_GET_FAMILY 1626 1627Default behavior changes 1628 * Stop storing persistent information about externally stored keys created 1629 through PSA Crypto with a volatile lifetime. Reported in #3288 and 1630 contributed by Steven Cooreman in #3382. 1631 1632Features 1633 * The new function mbedtls_ecp_write_key() exports private ECC keys back to 1634 a byte buffer. It is the inverse of the existing mbedtls_ecp_read_key(). 1635 * Support building on e2k (Elbrus) architecture: correctly enable 1636 -Wformat-signedness, and fix the code that causes signed-one-bit-field 1637 and sign-compare warnings. Contributed by makise-homura (Igor Molchanov) 1638 <akemi_homura@kurisa.ch>. 1639 1640Security 1641 * Fix a vulnerability in the verification of X.509 certificates when 1642 matching the expected common name (the cn argument of 1643 mbedtls_x509_crt_verify()) with the actual certificate name: when the 1644 subjecAltName extension is present, the expected name was compared to any 1645 name in that extension regardless of its type. This means that an 1646 attacker could for example impersonate a 4-bytes or 16-byte domain by 1647 getting a certificate for the corresponding IPv4 or IPv6 (this would 1648 require the attacker to control that IP address, though). Similar attacks 1649 using other subjectAltName name types might be possible. Found and 1650 reported by kFYatek in #3498. 1651 * When checking X.509 CRLs, a certificate was only considered as revoked if 1652 its revocationDate was in the past according to the local clock if 1653 available. In particular, on builds without MBEDTLS_HAVE_TIME_DATE, 1654 certificates were never considered as revoked. On builds with 1655 MBEDTLS_HAVE_TIME_DATE, an attacker able to control the local clock (for 1656 example, an untrusted OS attacking a secure enclave) could prevent 1657 revocation of certificates via CRLs. Fixed by no longer checking the 1658 revocationDate field, in accordance with RFC 5280. Reported by 1659 yuemonangong in #3340. Reported independently and fixed by 1660 Raoul Strackx and Jethro Beekman in #3433. 1661 * In (D)TLS record decryption, when using a CBC ciphersuites without the 1662 Encrypt-then-Mac extension, use constant code flow memory access patterns 1663 to extract and check the MAC. This is an improvement to the existing 1664 countermeasure against Lucky 13 attacks. The previous countermeasure was 1665 effective against network-based attackers, but less so against local 1666 attackers. The new countermeasure defends against local attackers, even 1667 if they have access to fine-grained measurements. In particular, this 1668 fixes a local Lucky 13 cache attack found and reported by Tuba Yavuz, 1669 Farhaan Fowze, Ken (Yihan) Bai, Grant Hernandez, and Kevin Butler 1670 (University of Florida) and Dave Tian (Purdue University). 1671 * Fix side channel in RSA private key operations and static (finite-field) 1672 Diffie-Hellman. An adversary with precise enough timing and memory access 1673 information (typically an untrusted operating system attacking a secure 1674 enclave) could bypass an existing counter-measure (base blinding) and 1675 potentially fully recover the private key. 1676 * Fix a 1-byte buffer overread in mbedtls_x509_crl_parse_der(). 1677 Credit to OSS-Fuzz for detecting the problem and to Philippe Antoine 1678 for pinpointing the problematic code. 1679 * Zeroising of plaintext buffers in mbedtls_ssl_read() to erase unused 1680 application data from memory. Reported in #689 by 1681 Johan Uppman Bruce of Sectra. 1682 1683Bugfix 1684 * Library files installed after a CMake build no longer have execute 1685 permission. 1686 * Use local labels in mbedtls_padlock_has_support() to fix an invalid symbol 1687 redefinition if the function is inlined. 1688 Reported in #3451 and fix contributed in #3452 by okhowang. 1689 * Fix the endianness of Curve25519 keys imported/exported through the PSA 1690 APIs. psa_import_key and psa_export_key will now correctly expect/output 1691 Montgomery keys in little-endian as defined by RFC7748. Contributed by 1692 Steven Cooreman in #3425. 1693 * Fix build errors when the only enabled elliptic curves are Montgomery 1694 curves. Raised by signpainter in #941 and by Taiki-San in #1412. This 1695 also fixes missing declarations reported by Steven Cooreman in #1147. 1696 * Fix self-test failure when the only enabled short Weierstrass elliptic 1697 curve is secp192k1. Fixes #2017. 1698 * PSA key import will now correctly import a Curve25519/Curve448 public key 1699 instead of erroring out. Contributed by Steven Cooreman in #3492. 1700 * Use arc4random_buf on NetBSD instead of rand implementation with cyclical 1701 lower bits. Fix contributed in #3540. 1702 * Fix a memory leak in mbedtls_md_setup() when using HMAC under low memory 1703 conditions. Reported and fix suggested by Guido Vranken in #3486. 1704 * Fix bug in redirection of unit test outputs on platforms where stdout is 1705 defined as a macro. First reported in #2311 and fix contributed in #3528. 1706 1707Changes 1708 * Only pass -Wformat-signedness to versions of GCC that support it. Reported 1709 in #3478 and fix contributed in #3479 by okhowang. 1710 * Reduce the stack consumption of mbedtls_x509write_csr_der() which 1711 previously could lead to stack overflow on constrained devices. 1712 Contributed by Doru Gucea and Simon Leet in #3464. 1713 * Undefine the ASSERT macro before defining it locally, in case it is defined 1714 in a platform header. Contributed by Abdelatif Guettouche in #3557. 1715 * Update copyright notices to use Linux Foundation guidance. As a result, 1716 the copyright of contributors other than Arm is now acknowledged, and the 1717 years of publishing are no longer tracked in the source files. This also 1718 eliminates the need for the lines declaring the files to be part of 1719 MbedTLS. Fixes #3457. 1720 * Add the command line parameter key_pwd to the ssl_client2 and ssl_server2 1721 example applications which allows to provide a password for the key file 1722 specified through the existing key_file argument. This allows the use of 1723 these applications with password-protected key files. Analogously but for 1724 ssl_server2 only, add the command line parameter key_pwd2 which allows to 1725 set a password for the key file provided through the existing key_file2 1726 argument. 1727 1728= mbed TLS 2.23.0 branch released 2020-07-01 1729 1730Default behavior changes 1731 * In the experimental PSA secure element interface, change the encoding of 1732 key lifetimes to encode a persistence level and the location. Although C 1733 prototypes do not effectively change, code calling 1734 psa_register_se_driver() must be modified to pass the driver's location 1735 instead of the keys' lifetime. If the library is upgraded on an existing 1736 device, keys created with the old lifetime value will not be readable or 1737 removable through Mbed TLS after the upgrade. 1738 1739Features 1740 * New functions in the error module return constant strings for 1741 high- and low-level error codes, complementing mbedtls_strerror() 1742 which constructs a string for any error code, including compound 1743 ones, but requires a writable buffer. Contributed by Gaurav Aggarwal 1744 in #3176. 1745 * The new utility programs/ssl/ssl_context_info prints a human-readable 1746 dump of an SSL context saved with mbedtls_ssl_context_save(). 1747 * Add support for midipix, a POSIX layer for Microsoft Windows. 1748 * Add new mbedtls_x509_crt_parse_der_with_ext_cb() routine which allows 1749 parsing unsupported certificate extensions via user provided callback. 1750 Contributed by Nicola Di Lieto <nicola.dilieto@gmail.com> in #3243 as 1751 a solution to #3241. 1752 * Pass the "certificate policies" extension to the callback supplied to 1753 mbedtls_x509_crt_parse_der_with_ext_cb() if it contains unsupported 1754 policies (#3419). 1755 * Added support to entropy_poll for the kern.arandom syscall supported on 1756 some BSD systems. Contributed by Nia Alarie in #3423. 1757 * Add support for Windows 2000 in net_sockets. Contributed by opatomic. #3239 1758 1759Security 1760 * Fix a side channel vulnerability in modular exponentiation that could 1761 reveal an RSA private key used in a secure enclave. Noticed by Sangho Lee, 1762 Ming-Wei Shih, Prasun Gera, Taesoo Kim and Hyesoon Kim (Georgia Institute 1763 of Technology); and Marcus Peinado (Microsoft Research). Reported by Raoul 1764 Strackx (Fortanix) in #3394. 1765 * Fix side channel in mbedtls_ecp_check_pub_priv() and 1766 mbedtls_pk_parse_key() / mbedtls_pk_parse_keyfile() (when loading a 1767 private key that didn't include the uncompressed public key), as well as 1768 mbedtls_ecp_mul() / mbedtls_ecp_mul_restartable() when called with a NULL 1769 f_rng argument. An attacker with access to precise enough timing and 1770 memory access information (typically an untrusted operating system 1771 attacking a secure enclave) could fully recover the ECC private key. 1772 Found and reported by Alejandro Cabrera Aldaya and Billy Brumley. 1773 * Fix issue in Lucky 13 counter-measure that could make it ineffective when 1774 hardware accelerators were used (using one of the MBEDTLS_SHAxxx_ALT 1775 macros). This would cause the original Lucky 13 attack to be possible in 1776 those configurations, allowing an active network attacker to recover 1777 plaintext after repeated timing measurements under some conditions. 1778 Reported and fix suggested by Luc Perneel in #3246. 1779 1780Bugfix 1781 * Fix the Visual Studio Release x64 build configuration for mbedtls itself. 1782 Completes a previous fix in Mbed TLS 2.19 that only fixed the build for 1783 the example programs. Reported in #1430 and fix contributed by irwir. 1784 * Fix undefined behavior in X.509 certificate parsing if the 1785 pathLenConstraint basic constraint value is equal to INT_MAX. 1786 The actual effect with almost every compiler is the intended 1787 behavior, so this is unlikely to be exploitable anywhere. #3192 1788 * Fix issue with a detected HW accelerated record error not being exposed 1789 due to shadowed variable. Contributed by Sander Visser in #3310. 1790 * Avoid NULL pointer dereferencing if mbedtls_ssl_free() is called with a 1791 NULL pointer argument. Contributed by Sander Visser in #3312. 1792 * Fix potential linker errors on dual world platforms by inlining 1793 mbedtls_gcc_group_to_psa(). This allows the pk.c module to link separately 1794 from psa_crypto.c. Fixes #3300. 1795 * Remove dead code in X.509 certificate parsing. Contributed by irwir in 1796 #2855. 1797 * Include asn1.h in error.c. Fixes #3328 reported by David Hu. 1798 * Fix potential memory leaks in ecp_randomize_jac() and ecp_randomize_mxz() 1799 when PRNG function fails. Contributed by Jonas Lejeune in #3318. 1800 * Remove unused macros from MSVC projects. Reported in #3297 and fix 1801 submitted in #3333 by irwir. 1802 * Add additional bounds checks in ssl_write_client_hello() preventing 1803 output buffer overflow if the configuration declared a buffer that was 1804 too small. 1805 * Set _POSIX_C_SOURCE to at least 200112L in C99 code. Reported in #3420 and 1806 fix submitted in #3421 by Nia Alarie. 1807 * Fix building library/net_sockets.c and the ssl_mail_client program on 1808 NetBSD. Contributed by Nia Alarie in #3422. 1809 * Fix false positive uninitialised variable reported by cpp-check. 1810 Contributed by Sander Visser in #3311. 1811 * Update iv and len context pointers manually when reallocating buffers 1812 using the MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH feature. This caused issues 1813 when receiving a connection with CID, when these fields were shifted 1814 in ssl_parse_record_header(). 1815 1816Changes 1817 * Fix warnings about signedness issues in format strings. The build is now 1818 clean of -Wformat-signedness warnings. Contributed by Kenneth Soerensen 1819 in #3153. 1820 * Fix minor performance issue in operations on Curve25519 caused by using a 1821 suboptimal modular reduction in one place. Found and fix contributed by 1822 Aurelien Jarno in #3209. 1823 * Combine identical cases in switch statements in md.c. Contributed 1824 by irwir in #3208. 1825 * Simplify a bounds check in ssl_write_certificate_request(). Contributed 1826 by irwir in #3150. 1827 * Unify the example programs termination to call mbedtls_exit() instead of 1828 using a return command. This has been done to enable customization of the 1829 behavior in bare metal environments. 1830 * Fix mbedtls_x509_dn_gets to escape non-ASCII characters as "?". 1831 Contributed by Koh M. Nakagawa in #3326. 1832 * Use FindPython3 when cmake version >= 3.15.0 1833 * Abort the ClientHello writing function as soon as some extension doesn't 1834 fit into the record buffer. Previously, such extensions were silently 1835 dropped. As a consequence, the TLS handshake now fails when the output 1836 buffer is not large enough to hold the ClientHello. 1837 * The unit tests now rely on header files in tests/include/test and source 1838 files in tests/src. When building with make or cmake, the files in 1839 tests/src are compiled and the resulting object linked into each test 1840 executable. 1841 * The ECP module, enabled by `MBEDTLS_ECP_C`, now depends on 1842 `MBEDTLS_CTR_DRBG_C` or `MBEDTLS_HMAC_DRBG_C` for some side-channel 1843 coutermeasures. If side channels are not a concern, this dependency can 1844 be avoided by enabling the new option `MBEDTLS_ECP_NO_INTERNAL_RNG`. 1845 * Align MSVC error flag with GCC and Clang. Contributed by Carlos Gomes 1846 Martinho. #3147 1847 * Remove superfluous assignment in mbedtls_ssl_parse_certificate(). Reported 1848 in #3182 and fix submitted by irwir. #3217 1849 * Fix typo in XTS tests. Reported and fix submitted by Kxuan. #3319 1850 1851= mbed TLS 2.22.0 branch released 2020-04-14 1852 1853New deprecations 1854 * Deprecate MBEDTLS_SSL_HW_RECORD_ACCEL that enables function hooks in the 1855 SSL module for hardware acceleration of individual records. 1856 * Deprecate mbedtls_ssl_get_max_frag_len() in favour of 1857 mbedtls_ssl_get_output_max_frag_len() and 1858 mbedtls_ssl_get_input_max_frag_len() to be more precise about which max 1859 fragment length is desired. 1860 1861Security 1862 * Fix issue in DTLS handling of new associations with the same parameters 1863 (RFC 6347 section 4.2.8): an attacker able to send forged UDP packets to 1864 the server could cause it to drop established associations with 1865 legitimate clients, resulting in a Denial of Service. This could only 1866 happen when MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE was enabled in config.h 1867 (which it is by default). 1868 * Fix side channel in ECC code that allowed an adversary with access to 1869 precise enough timing and memory access information (typically an 1870 untrusted operating system attacking a secure enclave) to fully recover 1871 an ECDSA private key. Found and reported by Alejandro Cabrera Aldaya, 1872 Billy Brumley and Cesar Pereida Garcia. CVE-2020-10932 1873 * Fix a potentially remotely exploitable buffer overread in a 1874 DTLS client when parsing the Hello Verify Request message. 1875 1876Features 1877 * The new build option MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH automatically 1878 resizes the I/O buffers before and after handshakes, reducing the memory 1879 consumption during application data transfer. 1880 1881Bugfix 1882 * Fix compilation failure when both MBEDTLS_SSL_PROTO_DTLS and 1883 MBEDTLS_SSL_HW_RECORD_ACCEL are enabled. 1884 * Remove a spurious check in ssl_parse_client_psk_identity that triggered 1885 a warning with some compilers. Fix contributed by irwir in #2856. 1886 * Fix a function name in a debug message. Contributed by Ercan Ozturk in 1887 #3013. 1888 1889Changes 1890 * Mbed Crypto is no longer a Git submodule. The crypto part of the library 1891 is back directly in the present repository. 1892 * Split mbedtls_ssl_get_max_frag_len() into 1893 mbedtls_ssl_get_output_max_frag_len() and 1894 mbedtls_ssl_get_input_max_frag_len() to ensure that a sufficient input 1895 buffer is allocated by the server (if MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH 1896 is defined), regardless of what MFL was configured for it. 1897 1898= mbed TLS 2.21.0 branch released 2020-02-20 1899 1900New deprecations 1901 * Deprecate MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO that enables parsing 1902 SSLv2 ClientHello messages. 1903 * Deprecate MBEDTLS_SSL_PROTO_SSL3 that enables support for SSLv3. 1904 * Deprecate for MBEDTLS_PKCS11_C, the wrapper around the pkcs11-helper 1905 library which allows TLS authentication to use keys stored in a 1906 PKCS#11 token such as a smartcard. 1907 1908Security 1909 * Fix potential memory overread when performing an ECDSA signature 1910 operation. The overread only happens with cryptographically low 1911 probability (of the order of 2^-n where n is the bitsize of the curve) 1912 unless the RNG is broken, and could result in information disclosure or 1913 denial of service (application crash or extra resource consumption). 1914 Found by Auke Zeilstra and Peter Schwabe, using static analysis. 1915 * To avoid a side channel vulnerability when parsing an RSA private key, 1916 read all the CRT parameters from the DER structure rather than 1917 reconstructing them. Found by Alejandro Cabrera Aldaya and Billy Bob 1918 Brumley. Reported and fix contributed by Jack Lloyd. 1919 ARMmbed/mbed-crypto#352 1920 1921Features 1922 * The new build option MBEDTLS_SHA512_NO_SHA384 allows building SHA-512 1923 support without SHA-384. 1924 1925API changes 1926 * Change the encoding of key types and curves in the PSA API. The new 1927 values are aligned with the upcoming release of the PSA Crypto API 1928 specification version 1.0.0. The main change which may break some 1929 existing code is that elliptic curve key types no longer encode the 1930 exact curve: a psa_ecc_curve_t or psa_key_type_t value only encodes 1931 a curve family and the key size determines the exact curve (for example, 1932 PSA_ECC_CURVE_SECP_R1 with 256 bits is P256R1). ARMmbed/mbed-crypto#330 1933 1934Bugfix 1935 * Fix an unchecked call to mbedtls_md() in the x509write module. 1936 * Fix build failure with MBEDTLS_ZLIB_SUPPORT enabled. Reported by 1937 Jack Lloyd in #2859. Fix submitted by jiblime in #2963. 1938 * Fix some false-positive uninitialized variable warnings in X.509. Fix 1939 contributed by apple-ihack-geek in #2663. 1940 * Fix a possible error code mangling in psa_mac_verify_finish() when 1941 a cryptographic accelerator fails. ARMmbed/mbed-crypto#345 1942 * Fix a bug in mbedtls_pk_parse_key() that would cause it to accept some 1943 RSA keys that would later be rejected by functions expecting private 1944 keys. Found by Catena cyber using oss-fuzz (issue 20467). 1945 * Fix a bug in mbedtls_pk_parse_key() that would cause it to 1946 accept some RSA keys with invalid values by silently fixing those values. 1947 1948= mbed TLS 2.20.0 branch released 2020-01-15 1949 1950Default behavior changes 1951 * The initial seeding of a CTR_DRBG instance makes a second call to the 1952 entropy function to obtain entropy for a nonce if the entropy size is less 1953 than 3/2 times the key size. In case you want to disable the extra call to 1954 grab entropy, you can call mbedtls_ctr_drbg_set_nonce_len() to force the 1955 nonce length to 0. 1956 1957Security 1958 * Enforce that mbedtls_entropy_func() gathers a total of 1959 MBEDTLS_ENTROPY_BLOCK_SIZE bytes or more from strong sources. In the 1960 default configuration, on a platform with a single entropy source, the 1961 entropy module formerly only grabbed 32 bytes, which is good enough for 1962 security if the source is genuinely strong, but less than the expected 64 1963 bytes (size of the entropy accumulator). 1964 * Zeroize local variables in mbedtls_internal_aes_encrypt() and 1965 mbedtls_internal_aes_decrypt() before exiting the function. The value of 1966 these variables can be used to recover the last round key. To follow best 1967 practice and to limit the impact of buffer overread vulnerabilities (like 1968 Heartbleed) we need to zeroize them before exiting the function. 1969 Issue reported by Tuba Yavuz, Farhaan Fowze, Ken (Yihang) Bai, 1970 Grant Hernandez, and Kevin Butler (University of Florida) and 1971 Dave Tian (Purdue University). 1972 * Fix side channel vulnerability in ECDSA. Our bignum implementation is not 1973 constant time/constant trace, so side channel attacks can retrieve the 1974 blinded value, factor it (as it is smaller than RSA keys and not guaranteed 1975 to have only large prime factors), and then, by brute force, recover the 1976 key. Reported by Alejandro Cabrera Aldaya and Billy Brumley. 1977 * Fix side channel vulnerability in ECDSA key generation. Obtaining precise 1978 timings on the comparison in the key generation enabled the attacker to 1979 learn leading bits of the ephemeral key used during ECDSA signatures and to 1980 recover the private key. Reported by Jeremy Dubeuf. 1981 * Catch failure of AES functions in mbedtls_ctr_drbg_random(). Uncaught 1982 failures could happen with alternative implementations of AES. Bug 1983 reported and fix proposed by Johan Uppman Bruce and Christoffer Lauri, 1984 Sectra. 1985 1986Features 1987 * Key derivation inputs in the PSA API can now either come from a key object 1988 or from a buffer regardless of the step type. 1989 * The CTR_DRBG module can grab a nonce from the entropy source during the 1990 initial seeding. The default nonce length is chosen based on the key size 1991 to achieve the security strength defined by NIST SP 800-90A. You can 1992 change it with mbedtls_ctr_drbg_set_nonce_len(). 1993 * Add ENUMERATED tag support to the ASN.1 module. Contributed by 1994 msopiha-linaro in ARMmbed/mbed-crypto#307. 1995 1996API changes 1997 * In the PSA API, forbid zero-length keys. To pass a zero-length input to a 1998 key derivation function, use a buffer instead (this is now always 1999 possible). 2000 * Rename psa_asymmetric_sign() to psa_sign_hash() and 2001 psa_asymmetric_verify() to psa_verify_hash(). 2002 2003Bugfix 2004 * Fix an incorrect size in a debugging message. Reported and fix 2005 submitted by irwir. Fixes #2717. 2006 * Fix an unused variable warning when compiling without DTLS. 2007 Reported and fix submitted by irwir. Fixes #2800. 2008 * Remove a useless assignment. Reported and fix submitted by irwir. 2009 Fixes #2801. 2010 * Fix a buffer overflow in the PSA HMAC code when using a long key with an 2011 unsupported algorithm. Fixes ARMmbed/mbed-crypto#254. 2012 * Fix mbedtls_asn1_get_int to support any number of leading zeros. Credit 2013 to OSS-Fuzz for finding a bug in an intermediate version of the fix. 2014 * Fix mbedtls_asn1_get_bitstring_null to correctly parse bitstrings of at 2015 most 2 bytes. 2016 * mbedtls_ctr_drbg_set_entropy_len() and 2017 mbedtls_hmac_drbg_set_entropy_len() now work if you call them before 2018 mbedtls_ctr_drbg_seed() or mbedtls_hmac_drbg_seed(). 2019 2020Changes 2021 * Remove the technical possibility to define custom mbedtls_md_info 2022 structures, which was exposed only in an internal header. 2023 * psa_close_key(0) and psa_destroy_key(0) now succeed (doing nothing, as 2024 before). 2025 * Variables containing error codes are now initialized to an error code 2026 rather than success, so that coding mistakes or memory corruption tends to 2027 cause functions to return this error code rather than a success. There are 2028 no known instances where this changes the behavior of the library: this is 2029 merely a robustness improvement. ARMmbed/mbed-crypto#323 2030 * Remove a useless call to mbedtls_ecp_group_free(). Contributed by 2031 Alexander Krizhanovsky in ARMmbed/mbed-crypto#210. 2032 * Speed up PBKDF2 by caching the digest calculation. Contributed by Jack 2033 Lloyd and Fortanix Inc in ARMmbed/mbed-crypto#277. 2034 * Small performance improvement of mbedtls_mpi_div_mpi(). Contributed by 2035 Alexander Krizhanovsky in ARMmbed/mbed-crypto#308. 2036 2037= mbed TLS 2.19.1 branch released 2019-09-16 2038 2039Features 2040 * Declare include headers as PUBLIC to propagate to CMake project consumers 2041 Contributed by Zachary J. Fields in PR #2949. 2042 * Add nss_keylog to ssl_client2 and ssl_server2, enabling easier analysis of 2043 TLS sessions with tools like Wireshark. 2044 2045API Changes 2046 * Make client_random and server_random const in 2047 mbedtls_ssl_export_keys_ext_t, so that the key exporter is discouraged 2048 from modifying the client/server hello. 2049 2050Bugfix 2051 * Fix some false-positive uninitialized variable warnings in crypto. Fix 2052 contributed by apple-ihack-geek in #2663. 2053 2054= mbed TLS 2.19.0 branch released 2019-09-06 2055 2056Security 2057 * Fix a missing error detection in ECJPAKE. This could have caused a 2058 predictable shared secret if a hardware accelerator failed and the other 2059 side of the key exchange had a similar bug. 2060 * When writing a private EC key, use a constant size for the private 2061 value, as specified in RFC 5915. Previously, the value was written 2062 as an ASN.1 INTEGER, which caused the size of the key to leak 2063 about 1 bit of information on average and could cause the value to be 2064 1 byte too large for the output buffer. 2065 * The deterministic ECDSA calculation reused the scheme's HMAC-DRBG to 2066 implement blinding. Because of this for the same key and message the same 2067 blinding value was generated. This reduced the effectiveness of the 2068 countermeasure and leaked information about the private key through side 2069 channels. Reported by Jack Lloyd. 2070 2071Features 2072 * Add new API functions mbedtls_ssl_session_save() and 2073 mbedtls_ssl_session_load() to allow serializing a session, for example to 2074 store it in non-volatile storage, and later using it for TLS session 2075 resumption. 2076 * Add a new API function mbedtls_ssl_check_record() to allow checking that 2077 an incoming record is valid, authentic and has not been seen before. This 2078 feature can be used alongside Connection ID and SSL context serialisation. 2079 The feature is enabled at compile-time by MBEDTLS_SSL_RECORD_CHECKING 2080 option. 2081 * New implementation of X25519 (ECDH using Curve25519) from Project Everest 2082 (https://project-everest.github.io/). It can be enabled at compile time 2083 with MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED. This implementation is formally 2084 verified and significantly faster, but is only supported on x86 platforms 2085 (32-bit and 64-bit) using GCC, Clang or Visual Studio. Contributed by 2086 Christoph Wintersteiger from Microsoft Research. 2087 * Add mbedtls_net_close(), enabling the building of forking servers where 2088 the parent process closes the client socket and continue accepting, and 2089 the child process closes the listening socket and handles the client 2090 socket. Contributed by Robert Larsen in #2803. 2091 2092API Changes 2093 * Add DER-encoded test CRTs to library/certs.c, allowing 2094 the example programs ssl_server2 and ssl_client2 to be run 2095 if MBEDTLS_FS_IO and MBEDTLS_PEM_PARSE_C are unset. Fixes #2254. 2096 * The HAVEGE state type now uses uint32_t elements instead of int. 2097 * The functions mbedtls_ecp_curve_list() and mbedtls_ecp_grp_id_list() now 2098 list all curves for which at least one of ECDH or ECDSA is supported, not 2099 just curves for which both are supported. Call mbedtls_ecdsa_can_do() or 2100 mbedtls_ecdh_can_do() on each result to check whether each algorithm is 2101 supported. 2102 * The new function mbedtls_ecdsa_sign_det_ext() is similar to 2103 mbedtls_ecdsa_sign_det() but allows passing an external RNG for the 2104 purpose of blinding. 2105 2106New deprecations 2107 * Deprecate mbedtls_ecdsa_sign_det() in favor of a functions that can take an 2108 RNG function as an input. 2109 * Calling mbedtls_ecdsa_write_signature() with NULL as the f_rng argument 2110 is now deprecated. 2111 2112Bugfix 2113 * Fix missing bounds checks in X.509 parsing functions that could 2114 lead to successful parsing of ill-formed X.509 CRTs. Fixes #2437. 2115 * Fix multiple X.509 functions previously returning ASN.1 low-level error 2116 codes to always wrap these codes into X.509 high level error codes before 2117 returning. Fixes #2431. 2118 * Fix to allow building test suites with any warning that detects unused 2119 functions. Fixes #1628. 2120 * Fix typo in net_would_block(). Fixes #528 reported by github-monoculture. 2121 * Remove redundant include file in timing.c. Fixes #2640 reported by irwir. 2122 * Fix build failure when building with mingw on Windows by including 2123 stdarg.h where needed. Fixes #2656. 2124 * Fix Visual Studio Release x64 build configuration by inheriting 2125 PlatformToolset from the project configuration. Fixes #1430 reported by 2126 irwir. 2127 * Enable Suite B with subset of ECP curves. Make sure the code compiles even 2128 if some curves are not defined. Fixes #1591 reported by dbedev. 2129 * Fix misuse of signed arithmetic in the HAVEGE module. #2598 2130 * Avoid use of statically sized stack buffers for certificate writing. 2131 This previously limited the maximum size of DER encoded certificates 2132 in mbedtls_x509write_crt_der() to 2Kb. Reported by soccerGB in #2631. 2133 * Fix partial zeroing in x509_get_other_name. Found and fixed by ekse, #2716. 2134 * Update test certificates that were about to expire. Reported by 2135 Bernhard M. Wiedemann in #2357. 2136 * Fix the build on ARMv5TE in ARM mode to not use assembly instructions 2137 that are only available in Thumb mode. Fix contributed by Aurelien Jarno 2138 in #2169. 2139 * Fix propagation of restart contexts in restartable EC operations. 2140 This could previously lead to segmentation faults in builds using an 2141 address-sanitizer and enabling but not using MBEDTLS_ECP_RESTARTABLE. 2142 * Fix memory leak in in mpi_miller_rabin(). Contributed by 2143 Jens Wiklander <jens.wiklander@linaro.org> in #2363 2144 * Improve code clarity in x509_crt module, removing false-positive 2145 uninitialized variable warnings on some recent toolchains (GCC8, etc). 2146 Discovered and fixed by Andy Gross (Linaro), #2392. 2147 * Fix bug in endianness conversion in bignum module. This lead to 2148 functionally incorrect code on bigendian systems which don't have 2149 __BYTE_ORDER__ defined. Reported by Brendan Shanks. Fixes #2622. 2150 2151Changes 2152 * Replace multiple uses of MD2 by SHA-256 in X.509 test suite. Fixes #821. 2153 * Make it easier to define MBEDTLS_PARAM_FAILED as assert (which config.h 2154 suggests). #2671 2155 * Make `make clean` clean all programs always. Fixes #1862. 2156 * Add a Dockerfile and helper scripts (all-in-docker.sh, basic-in-docker.sh, 2157 docker-env.sh) to simplify running test suites on a Linux host. Contributed 2158 by Peter Kolbus (Garmin). 2159 * Add `reproducible` option to `ssl_client2` and `ssl_server2` to enable 2160 test runs without variability. Contributed by Philippe Antoine (Catena 2161 cyber) in #2681. 2162 * Extended .gitignore to ignore Visual Studio artifacts. Fixed by ConfusedSushi. 2163 * Adds fuzz targets, especially for continuous fuzzing with OSS-Fuzz. 2164 Contributed by Philippe Antoine (Catena cyber). 2165 * Remove the crypto part of the library from Mbed TLS. The crypto 2166 code and tests are now only available via Mbed Crypto, which 2167 Mbed TLS references as a Git submodule. 2168 2169= mbed TLS 2.18.1 branch released 2019-07-12 2170 2171Bugfix 2172 * Fix build failure when building with mingw on Windows by including 2173 stdarg.h where needed. Fixes #2656. 2174 2175Changes 2176 * Enable building of Mbed TLS as a CMake subproject. Suggested and fixed by 2177 Ashley Duncan in #2609. 2178 2179= mbed TLS 2.18.0 branch released 2019-06-11 2180 2181Features 2182 * Add the Any Policy certificate policy oid, as defined in 2183 rfc 5280 section 4.2.1.4. 2184 * It is now possible to use NIST key wrap mode via the mbedtls_cipher API. 2185 Contributed by Jack Lloyd and Fortanix Inc. 2186 * Add the Wi-SUN Field Area Network (FAN) device extended key usage. 2187 * Add the oid certificate policy x509 extension. 2188 * It is now possible to perform RSA PKCS v1.5 signatures with RIPEMD-160 digest. 2189 Contributed by Jack Lloyd and Fortanix Inc. 2190 * Extend the MBEDTLS_SSL_EXPORT_KEYS to export the handshake randbytes, 2191 and the used tls-prf. 2192 * Add public API for tls-prf function, according to requested enum. 2193 * Add support for parsing otherName entries in the Subject Alternative Name 2194 X.509 certificate extension, specifically type hardware module name, 2195 as defined in RFC 4108 section 5. 2196 * Add support for parsing certificate policies extension, as defined in 2197 RFC 5280 section 4.2.1.4. Currently, only the "Any Policy" policy is 2198 supported. 2199 * List all SAN types in the subject_alt_names field of the certificate. 2200 Resolves #459. 2201 * Add support for draft-05 of the Connection ID extension, as specified 2202 in https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05. 2203 The Connection ID extension allows to keep DTLS connections beyond the 2204 lifetime of the underlying transport by adding a connection identifier 2205 to the DTLS record header. This identifier can be used to associated an 2206 incoming record with the correct connection data even after the peer has 2207 changed its IP or port. The feature is enabled at compile-time by setting 2208 MBEDTLS_SSL_DTLS_CONNECTION_ID (disabled by default), and at run-time 2209 through the new APIs mbedtls_ssl_conf_cid() and mbedtls_ssl_set_cid(). 2210 2211 2212API Changes 2213 * Extend the MBEDTLS_SSL_EXPORT_KEYS to export the handshake randbytes, 2214 and the used tls-prf. 2215 * Add public API for tls-prf function, according to requested enum. 2216 2217Bugfix 2218 * Fix private key DER output in the key_app_writer example. File contents 2219 were shifted by one byte, creating an invalid ASN.1 tag. Fixed by 2220 Christian Walther in #2239. 2221 * Fix potential memory leak in X.509 self test. Found and fixed by 2222 Junhwan Park, #2106. 2223 * Reduce stack usage of hkdf tests. Fixes #2195. 2224 * Fix 1-byte buffer overflow in mbedtls_mpi_write_string() when 2225 used with negative inputs. Found by Guido Vranken in #2404. Credit to 2226 OSS-Fuzz. 2227 * Fix bugs in the AEAD test suite which would be exposed by ciphers which 2228 either used both encrypt and decrypt key schedules, or which perform padding. 2229 GCM and CCM were not affected. Fixed by Jack Lloyd. 2230 * Fix incorrect default port number in ssl_mail_client example's usage. 2231 Found and fixed by irwir. #2337 2232 * Add psa_util.h to test/cpp_dummy_build to fix build_default_make_gcc_and_cxx. 2233 Fixed by Peter Kolbus (Garmin). #2579 2234 * Add missing parentheses around parameters in the definition of the 2235 public macro MBEDTLS_X509_ID_FLAG. This could lead to invalid evaluation 2236 in case operators binding less strongly than subtraction were used 2237 for the parameter. 2238 * Add a check for MBEDTLS_X509_CRL_PARSE_C in ssl_server2, guarding the crl 2239 sni entry parameter. Reported by inestlerode in #560. 2240 * Set the next sequence of the subject_alt_name to NULL when deleting 2241 sequence on failure. Found and fix suggested by Philippe Antoine. 2242 Credit to OSS-Fuzz. 2243 2244Changes 2245 * Server's RSA certificate in certs.c was SHA-1 signed. In the default 2246 mbedTLS configuration only SHA-2 signed certificates are accepted. 2247 This certificate is used in the demo server programs, which lead the 2248 client programs to fail at the peer's certificate verification 2249 due to an unacceptable hash signature. The certificate has been 2250 updated to one that is SHA-256 signed. Fix contributed by 2251 Illya Gerasymchuk. 2252 * Return from various debugging routines immediately if the 2253 provided SSL context is unset. 2254 * Remove dead code from bignum.c in the default configuration. 2255 Found by Coverity, reported and fixed by Peter Kolbus (Garmin). Fixes #2309. 2256 * Add test for minimal value of MBEDTLS_MPI_WINDOW_SIZE to all.sh. 2257 Contributed by Peter Kolbus (Garmin). 2258 * Change wording in the `mbedtls_ssl_conf_max_frag_len()`'s documentation to 2259 improve clarity. Fixes #2258. 2260 2261= mbed TLS 2.17.0 branch released 2019-03-19 2262 2263Features 2264 * Add a new X.509 API call `mbedtls_x509_parse_der_nocopy()` 2265 which allows copy-less parsing of DER encoded X.509 CRTs, 2266 at the cost of additional lifetime constraints on the input 2267 buffer, but at the benefit of reduced RAM consumption. 2268 * Add a new function mbedtls_asn1_write_named_bitstring() to write ASN.1 2269 named bitstring in DER as required by RFC 5280 Appendix B. 2270 * Add MBEDTLS_REMOVE_3DES_CIPHERSUITES to allow removing 3DES ciphersuites 2271 from the default list (enabled by default). See 2272 https://sweet32.info/SWEET32_CCS16.pdf. 2273 2274API Changes 2275 * Add a new X.509 API call `mbedtls_x509_parse_der_nocopy()`. 2276 See the Features section for more information. 2277 * Allow to opt in to the removal the API mbedtls_ssl_get_peer_cert() 2278 for the benefit of saving RAM, by disabling the new compile-time 2279 option MBEDTLS_SSL_KEEP_PEER_CERTIFICATE (enabled by default for 2280 API stability). Disabling this option makes mbedtls_ssl_get_peer_cert() 2281 always return NULL, and removes the peer_cert field from the 2282 mbedtls_ssl_session structure which otherwise stores the peer's 2283 certificate. 2284 2285Security 2286 * Make mbedtls_ecdh_get_params return an error if the second key 2287 belongs to a different group from the first. Before, if an application 2288 passed keys that belonged to different group, the first key's data was 2289 interpreted according to the second group, which could lead to either 2290 an error or a meaningless output from mbedtls_ecdh_get_params. In the 2291 latter case, this could expose at most 5 bits of the private key. 2292 2293Bugfix 2294 * Fix a compilation issue with mbedtls_ecp_restart_ctx not being defined 2295 when MBEDTLS_ECP_ALT is defined. Reported by jwhui. Fixes #2242. 2296 * Run the AD too long test only if MBEDTLS_CCM_ALT is not defined. 2297 Raised as a comment in #1996. 2298 * Reduce the stack consumption of mbedtls_mpi_fill_random() which could 2299 previously lead to a stack overflow on constrained targets. 2300 * Add `MBEDTLS_SELF_TEST` for the mbedtls_self_test functions 2301 in the header files, which missed the precompilation check. #971 2302 * Fix returning the value 1 when mbedtls_ecdsa_genkey failed. 2303 * Remove a duplicate #include in a sample program. Fixed by Masashi Honma #2326. 2304 * Remove the mbedtls namespacing from the header file, to fix a "file not found" 2305 build error. Fixed by Haijun Gu #2319. 2306 * Fix signed-to-unsigned integer conversion warning 2307 in X.509 module. Fixes #2212. 2308 * Reduce stack usage of `mpi_write_hlp()` by eliminating recursion. 2309 Fixes #2190. 2310 * Fix false failure in all.sh when backup files exist in include/mbedtls 2311 (e.g. config.h.bak). Fixed by Peter Kolbus (Garmin) #2407. 2312 * Ensure that unused bits are zero when writing ASN.1 bitstrings when using 2313 mbedtls_asn1_write_bitstring(). 2314 * Fix issue when writing the named bitstrings in KeyUsage and NsCertType 2315 extensions in CSRs and CRTs that caused these bitstrings to not be encoded 2316 correctly as trailing zeroes were not accounted for as unused bits in the 2317 leading content octet. Fixes #1610. 2318 2319Changes 2320 * Reduce RAM consumption during session renegotiation by not storing 2321 the peer CRT chain and session ticket twice. 2322 * Include configuration file in all header files that use configuration, 2323 instead of relying on other header files that they include. 2324 Inserted as an enhancement for #1371 2325 * Add support for alternative CSR headers, as used by Microsoft and defined 2326 in RFC 7468. Found by Michael Ernst. Fixes #767. 2327 * Correct many misspellings. Fixed by MisterDA #2371. 2328 * Provide an abstraction of vsnprintf to allow alternative implementations 2329 for platforms that don't provide it. Based on contributions by Joris Aerts 2330 and Nathaniel Wesley Filardo. 2331 * Fix clobber list in MIPS assembly for large integer multiplication. 2332 Previously, this could lead to functionally incorrect assembly being 2333 produced by some optimizing compilers, showing up as failures in 2334 e.g. RSA or ECC signature operations. Reported in #1722, fix suggested 2335 by Aurelien Jarno and submitted by Jeffrey Martin. 2336 * Reduce the complexity of the timing tests. They were assuming more than the 2337 underlying OS actually guarantees. 2338 * Fix configuration queries in ssl-opt.h. #2030 2339 * Ensure that ssl-opt.h can be run in OS X. #2029 2340 * Re-enable certain interoperability tests in ssl-opt.sh which had previously 2341 been disabled for lack of a sufficiently recent version of GnuTLS on the CI. 2342 * Ciphersuites based on 3DES now have the lowest priority by default when 2343 they are enabled. 2344 2345= mbed TLS 2.16.0 branch released 2018-12-21 2346 2347Features 2348 * Add a new config.h option of MBEDTLS_CHECK_PARAMS that enables validation 2349 of parameters in the API. This allows detection of obvious misuses of the 2350 API, such as passing NULL pointers. The API of existing functions hasn't 2351 changed, but requirements on parameters have been made more explicit in 2352 the documentation. See the corresponding API documentation for each 2353 function to see for which parameter values it is defined. This feature is 2354 disabled by default. See its API documentation in config.h for additional 2355 steps you have to take when enabling it. 2356 2357API Changes 2358 * The following functions in the random generator modules have been 2359 deprecated and replaced as shown below. The new functions change 2360 the return type from void to int to allow returning error codes when 2361 using MBEDTLS_<MODULE>_ALT for the underlying AES or message digest 2362 primitive. Fixes #1798. 2363 mbedtls_ctr_drbg_update() -> mbedtls_ctr_drbg_update_ret() 2364 mbedtls_hmac_drbg_update() -> mbedtls_hmac_drbg_update_ret() 2365 * Extend ECDH interface to enable alternative implementations. 2366 * Deprecate error codes of the form MBEDTLS_ERR_xxx_INVALID_KEY_LENGTH for 2367 ARIA, CAMELLIA and Blowfish. These error codes will be replaced by 2368 the more generic per-module error codes MBEDTLS_ERR_xxx_BAD_INPUT_DATA. 2369 * Additional parameter validation checks have been added for the following 2370 modules - AES, ARIA, Blowfish, CAMELLIA, CCM, GCM, DHM, ECP, ECDSA, ECDH, 2371 ECJPAKE, SHA, Chacha20 and Poly1305, cipher, pk, RSA, and MPI. 2372 Where modules have had parameter validation added, existing parameter 2373 checks may have changed. Some modules, such as Chacha20 had existing 2374 parameter validation whereas other modules had little. This has now been 2375 changed so that the same level of validation is present in all modules, and 2376 that it is now optional with the MBEDTLS_CHECK_PARAMS flag which by default 2377 is off. That means that checks which were previously present by default 2378 will no longer be. 2379 2380New deprecations 2381 * Deprecate mbedtls_ctr_drbg_update and mbedtls_hmac_drbg_update 2382 in favor of functions that can return an error code. 2383 2384Bugfix 2385 * Fix for Clang, which was reporting a warning for the bignum.c inline 2386 assembly for AMD64 targets creating string literals greater than those 2387 permitted by the ISO C99 standard. Found by Aaron Jones. Fixes #482. 2388 * Fix runtime error in `mbedtls_platform_entropy_poll()` when run 2389 through qemu user emulation. Reported and fix suggested by randombit 2390 in #1212. Fixes #1212. 2391 * Fix an unsafe bounds check when restoring an SSL session from a ticket. 2392 This could lead to a buffer overflow, but only in case ticket authentication 2393 was broken. Reported and fix suggested by Guido Vranken in #659. 2394 * Add explicit integer to enumeration type casts to example program 2395 programs/pkey/gen_key which previously led to compilation failure 2396 on some toolchains. Reported by phoenixmcallister. Fixes #2170. 2397 * Fix double initialization of ECC hardware that made some accelerators 2398 hang. 2399 * Clarify documentation of mbedtls_ssl_set_own_cert() regarding the absence 2400 of check for certificate/key matching. Reported by Attila Molnar, #507. 2401 2402 = mbed TLS 2.15.1 branch released 2018-11-30 2403 2404 Changes 2405 * Update the Mbed Crypto submodule to version 0.1.0b2. 2406 2407 = mbed TLS 2.15.0 branch released 2018-11-23 2408 2409 Features 2410 * Add an experimental build option, USE_CRYPTO_SUBMODULE, to enable use of 2411 Mbed Crypto as the source of the cryptography implementation. 2412 * Add an experimental configuration option, MBEDTLS_PSA_CRYPTO_C, to enable 2413 the PSA Crypto API from Mbed Crypto when additionally used with the 2414 USE_CRYPTO_SUBMODULE build option. 2415 2416 Changes 2417 * Add unit tests for AES-GCM when called through mbedtls_cipher_auth_xxx() 2418 from the cipher abstraction layer. Fixes #2198. 2419 2420= mbed TLS 2.14.1 branch released 2018-11-30 2421 2422Security 2423 * Fix timing variations and memory access variations in RSA PKCS#1 v1.5 2424 decryption that could lead to a Bleichenbacher-style padding oracle 2425 attack. In TLS, this affects servers that accept ciphersuites based on 2426 RSA decryption (i.e. ciphersuites whose name contains RSA but not 2427 (EC)DH(E)). Discovered by Eyal Ronen (Weizmann Institute), Robert Gillham 2428 (University of Adelaide), Daniel Genkin (University of Michigan), 2429 Adi Shamir (Weizmann Institute), David Wong (NCC Group), and Yuval Yarom 2430 (University of Adelaide, Data61). The attack is described in more detail 2431 in the paper available here: http://cat.eyalro.net/cat.pdf CVE-2018-19608 2432 * In mbedtls_mpi_write_binary(), don't leak the exact size of the number 2433 via branching and memory access patterns. An attacker who could submit 2434 a plaintext for RSA PKCS#1 v1.5 decryption but only observe the timing 2435 of the decryption and not its result could nonetheless decrypt RSA 2436 plaintexts and forge RSA signatures. Other asymmetric algorithms may 2437 have been similarly vulnerable. Reported by Eyal Ronen, Robert Gillham, 2438 Daniel Genkin, Adi Shamir, David Wong and Yuval Yarom. 2439 * Wipe sensitive buffers on the stack in the CTR_DRBG and HMAC_DRBG 2440 modules. 2441 2442API Changes 2443 * The new functions mbedtls_ctr_drbg_update_ret() and 2444 mbedtls_hmac_drbg_update_ret() are similar to mbedtls_ctr_drbg_update() 2445 and mbedtls_hmac_drbg_update() respectively, but the new functions 2446 report errors whereas the old functions return void. We recommend that 2447 applications use the new functions. 2448 2449= mbed TLS 2.14.0 branch released 2018-11-19 2450 2451Security 2452 * Fix overly strict DN comparison when looking for CRLs belonging to a 2453 particular CA. This previously led to ignoring CRLs when the CRL's issuer 2454 name and the CA's subject name differed in their string encoding (e.g., 2455 one using PrintableString and the other UTF8String) or in the choice of 2456 upper and lower case. Reported by Henrik Andersson of Bosch GmbH in issue 2457 #1784. 2458 * Fix a flawed bounds check in server PSK hint parsing. In case the 2459 incoming message buffer was placed within the first 64KiB of address 2460 space and a PSK-(EC)DHE ciphersuite was used, this allowed an attacker 2461 to trigger a memory access up to 64KiB beyond the incoming message buffer, 2462 potentially leading to an application crash or information disclosure. 2463 * Fix mbedtls_mpi_is_prime() to use more rounds of probabilistic testing. The 2464 previous settings for the number of rounds made it practical for an 2465 adversary to construct non-primes that would be erroneously accepted as 2466 primes with high probability. This does not have an impact on the 2467 security of TLS, but can matter in other contexts with numbers chosen 2468 potentially by an adversary that should be prime and can be validated. 2469 For example, the number of rounds was enough to securely generate RSA key 2470 pairs or Diffie-Hellman parameters, but was insufficient to validate 2471 Diffie-Hellman parameters properly. 2472 See "Prime and Prejudice" by by Martin R. Albrecht and Jake Massimo and 2473 Kenneth G. Paterson and Juraj Somorovsky. 2474 2475Features 2476 * Add support for temporarily suspending expensive ECC computations after 2477 some configurable amount of operations. This is intended to be used in 2478 constrained, single-threaded systems where ECC is time consuming and can 2479 block other operations until they complete. This is disabled by default, 2480 but can be enabled by MBEDTLS_ECP_RESTARTABLE at compile time and 2481 configured by mbedtls_ecp_set_max_ops() at runtime. It applies to the new 2482 xxx_restartable functions in ECP, ECDSA, PK and X.509 (CRL not supported 2483 yet), and to existing functions in ECDH and SSL (currently only 2484 implemented client-side, for ECDHE-ECDSA ciphersuites in TLS 1.2, 2485 including client authentication). 2486 * Add support for Arm CPU DSP extensions to accelerate asymmetric key 2487 operations. On CPUs where the extensions are available, they can accelerate 2488 MPI multiplications used in ECC and RSA cryptography. Contributed by 2489 Aurelien Jarno. 2490 * Extend RSASSA-PSS signature to allow a smaller salt size. Previously, PSS 2491 signature always used a salt with the same length as the hash, and returned 2492 an error if this was not possible. Now the salt size may be up to two bytes 2493 shorter. This allows the library to support all hash and signature sizes 2494 that comply with FIPS 186-4, including SHA-512 with a 1024-bit key. 2495 * Add support for 128-bit keys in CTR_DRBG. Note that using keys shorter 2496 than 256 bits limits the security of generated material to 128 bits. 2497 2498API Changes 2499 * Add a common error code of `MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED` for 2500 a feature that is not supported by underlying alternative 2501 implementations implementing cryptographic primitives. This is useful for 2502 hardware accelerators that don't implement all options or features. 2503 2504New deprecations 2505 * All module specific errors following the form 2506 MBEDTLS_ERR_XXX_FEATURE_UNAVAILABLE that indicate a feature is not 2507 supported are deprecated and are now replaced by the new equivalent 2508 platform error. 2509 * All module specific generic hardware acceleration errors following the 2510 form MBEDTLS_ERR_XXX_HW_ACCEL_FAILED that are deprecated and are replaced 2511 by the equivalent plaform error. 2512 * Deprecate the function mbedtls_mpi_is_prime() in favor of 2513 mbedtls_mpi_is_prime_ext() which allows specifying the number of 2514 Miller-Rabin rounds. 2515 2516Bugfix 2517 * Fix wrong order of freeing in programs/ssl/ssl_server2 example 2518 application leading to a memory leak in case both 2519 MBEDTLS_MEMORY_BUFFER_ALLOC_C and MBEDTLS_MEMORY_BACKTRACE are set. 2520 Fixes #2069. 2521 * Fix a bug in the update function for SSL ticket keys which previously 2522 invalidated keys of a lifetime of less than a 1s. Fixes #1968. 2523 * Fix failure in hmac_drbg in the benchmark sample application, when 2524 MBEDTLS_THREADING_C is defined. Found by TrinityTonic, #1095 2525 * Fix a bug in the record decryption routine ssl_decrypt_buf() 2526 which lead to accepting properly authenticated but improperly 2527 padded records in case of CBC ciphersuites using Encrypt-then-MAC. 2528 * Fix memory leak and freeing without initialization in the example 2529 program programs/x509/cert_write. Fixes #1422. 2530 * Ignore IV in mbedtls_cipher_set_iv() when the cipher mode is 2531 MBEDTLS_MODE_ECB. Found by ezdevelop. Fixes #1091. 2532 * Zeroize memory used for buffering or reassembling handshake messages 2533 after use. 2534 * Use `mbedtls_platform_zeroize()` instead of `memset()` for zeroization 2535 of sensitive data in the example programs aescrypt2 and crypt_and_hash. 2536 * Change the default string format used for various X.509 DN attributes to 2537 UTF8String. Previously, the use of the PrintableString format led to 2538 wildcards and non-ASCII characters being unusable in some DN attributes. 2539 Reported by raprepo in #1860 and by kevinpt in #468. Fix contributed by 2540 Thomas-Dee. 2541 * Fix compilation failure for configurations which use compile time 2542 replacements of standard calloc/free functions through the macros 2543 MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO. 2544 Reported by ole-de and ddhome2006. Fixes #882, #1642 and #1706. 2545 2546Changes 2547 * Removed support for Yotta as a build tool. 2548 * Add tests for session resumption in DTLS. 2549 * Close a test gap in (D)TLS between the client side and the server side: 2550 test the handling of large packets and small packets on the client side 2551 in the same way as on the server side. 2552 * Change the dtls_client and dtls_server samples to work by default over 2553 IPv6 and optionally by a build option over IPv4. 2554 * Change the use of Windows threading to use Microsoft Visual C++ runtime 2555 calls, rather than Win32 API calls directly. This is necessary to avoid 2556 conflict with C runtime usage. Found and fixed by irwir. 2557 * Remember the string format of X.509 DN attributes when replicating 2558 X.509 DNs. Previously, DN attributes were always written in their default 2559 string format (mostly PrintableString), which could lead to CRTs being 2560 created which used PrintableStrings in the issuer field even though the 2561 signing CA used UTF8Strings in its subject field; while X.509 compliant, 2562 such CRTs were rejected in some applications, e.g. some versions of 2563 Firefox, curl and GnuTLS. Reported in #1033 by Moschn. Fix contributed by 2564 Thomas-Dee. 2565 * Improve documentation of mbedtls_ssl_get_verify_result(). 2566 Fixes #517 reported by github-monoculture. 2567 * Add MBEDTLS_MPI_GEN_PRIME_FLAG_LOW_ERR flag to mbedtls_mpi_gen_prime() and 2568 use it to reduce error probability in RSA key generation to levels mandated 2569 by FIPS-186-4. 2570 2571= mbed TLS 2.13.1 branch released 2018-09-06 2572 2573API Changes 2574 * Extend the platform module with an abstraction mbedtls_platform_gmtime_r() 2575 whose implementation should behave as a thread-safe version of gmtime(). 2576 This allows users to configure such an implementation at compile time when 2577 the target system cannot be deduced automatically, by setting the option 2578 MBEDTLS_PLATFORM_GMTIME_R_ALT. At this stage Mbed TLS is only able to 2579 automatically select implementations for Windows and POSIX C libraries. 2580 2581Bugfix 2582 * Fix build failures on platforms where only gmtime() is available but 2583 neither gmtime_r() nor gmtime_s() are present. Fixes #1907. 2584 2585= mbed TLS 2.13.0 branch released 2018-08-31 2586 2587Security 2588 * Fix an issue in the X.509 module which could lead to a buffer overread 2589 during certificate extensions parsing. In case of receiving malformed 2590 input (extensions length field equal to 0), an illegal read of one byte 2591 beyond the input buffer is made. Found and analyzed by Nathan Crandall. 2592 2593Features 2594 * Add support for fragmentation of outgoing DTLS handshake messages. This 2595 is controlled by the maximum fragment length as set locally or negotiated 2596 with the peer, as well as by a new per-connection MTU option, set using 2597 mbedtls_ssl_set_mtu(). 2598 * Add support for auto-adjustment of MTU to a safe value during the 2599 handshake when flights do not get through (RFC 6347, section 4.1.1.1, 2600 last paragraph). 2601 * Add support for packing multiple records within a single datagram, 2602 enabled by default. 2603 * Add support for buffering out-of-order handshake messages in DTLS. 2604 The maximum amount of RAM used for this can be controlled by the 2605 compile-time constant MBEDTLS_SSL_DTLS_MAX_BUFFERING defined 2606 in mbedtls/config.h. 2607 2608API Changes 2609 * Add function mbedtls_ssl_set_datagram_packing() to configure 2610 the use of datagram packing (enabled by default). 2611 2612Bugfix 2613 * Fix a potential memory leak in mbedtls_ssl_setup() function. An allocation 2614 failure in the function could lead to other buffers being leaked. 2615 * Fixes an issue with MBEDTLS_CHACHAPOLY_C which would not compile if 2616 MBEDTLS_ARC4_C and MBEDTLS_CIPHER_NULL_CIPHER weren't also defined. #1890 2617 * Fix a memory leak in ecp_mul_comb() if ecp_precompute_comb() fails. 2618 Fix contributed by Espressif Systems. 2619 * Add ecc extensions only if an ecc based ciphersuite is used. 2620 This improves compliance to RFC 4492, and as a result, solves 2621 interoperability issues with BouncyCastle. Raised by milenamil in #1157. 2622 * Replace printf with mbedtls_printf in the ARIA module. Found by 2623 TrinityTonic in #1908. 2624 * Fix potential use-after-free in mbedtls_ssl_get_max_frag_len() 2625 and mbedtls_ssl_get_record_expansion() after a session reset. Fixes #1941. 2626 * Fix a bug that caused SSL/TLS clients to incorrectly abort the handshake 2627 with TLS versions 1.1 and earlier when the server requested authentication 2628 without providing a list of CAs. This was due to an overly strict bounds 2629 check in parsing the CertificateRequest message, 2630 introduced in Mbed TLS 2.12.0. Fixes #1954. 2631 * Fix a miscalculation of the maximum record expansion in 2632 mbedtls_ssl_get_record_expansion() in case of ChachaPoly ciphersuites, 2633 or CBC ciphersuites in (D)TLS versions 1.1 or higher. Fixes #1913, #1914. 2634 * Fix undefined shifts with negative values in certificates parsing 2635 (found by Catena cyber using oss-fuzz) 2636 * Fix memory leak and free without initialization in pk_encrypt 2637 and pk_decrypt example programs. Reported by Brace Stout. Fixes #1128. 2638 * Remove redundant else statement. Raised by irwir. Fixes #1776. 2639 2640Changes 2641 * Copy headers preserving timestamps when doing a "make install". 2642 Contributed by xueruini. 2643 * Allow the forward declaration of public structs. Contributed by Dawid 2644 Drozd. Fixes #1215 raised by randombit. 2645 * Improve compatibility with some alternative CCM implementations by using 2646 CCM test vectors from RAM. 2647 * Add support for buffering of out-of-order handshake messages. 2648 * Add warnings to the documentation of the HKDF module to reduce the risk 2649 of misusing the mbedtls_hkdf_extract() and mbedtls_hkdf_expand() 2650 functions. Fixes #1775. Reported by Brian J. Murray. 2651 2652= mbed TLS 2.12.0 branch released 2018-07-25 2653 2654Security 2655 * Fix a vulnerability in TLS ciphersuites based on CBC and using SHA-384, 2656 in (D)TLS 1.0 to 1.2, that allowed an active network attacker to 2657 partially recover the plaintext of messages under some conditions by 2658 exploiting timing measurements. With DTLS, the attacker could perform 2659 this recovery by sending many messages in the same connection. With TLS 2660 or if mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only 2661 worked if the same secret (for example a HTTP Cookie) has been repeatedly 2662 sent over connections manipulated by the attacker. Connections using GCM 2663 or CCM instead of CBC, using hash sizes other than SHA-384, or using 2664 Encrypt-then-Mac (RFC 7366) were not affected. The vulnerability was 2665 caused by a miscalculation (for SHA-384) in a countermeasure to the 2666 original Lucky 13 attack. Found by Kenny Paterson, Eyal Ronen and Adi 2667 Shamir. 2668 * Fix a vulnerability in TLS ciphersuites based on CBC, in (D)TLS 1.0 to 2669 1.2, that allowed a local attacker, able to execute code on the local 2670 machine as well as manipulate network packets, to partially recover the 2671 plaintext of messages under some conditions by using a cache attack 2672 targeting an internal MD/SHA buffer. With TLS or if 2673 mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only worked if 2674 the same secret (for example a HTTP Cookie) has been repeatedly sent over 2675 connections manipulated by the attacker. Connections using GCM or CCM 2676 instead of CBC or using Encrypt-then-Mac (RFC 7366) were not affected. 2677 Found by Kenny Paterson, Eyal Ronen and Adi Shamir. 2678 * Add a counter-measure against a vulnerability in TLS ciphersuites based 2679 on CBC, in (D)TLS 1.0 to 1.2, that allowed a local attacker, able to 2680 execute code on the local machine as well as manipulate network packets, 2681 to partially recover the plaintext of messages under some conditions (see 2682 previous entry) by using a cache attack targeting the SSL input record 2683 buffer. Connections using GCM or CCM instead of CBC or using 2684 Encrypt-then-Mac (RFC 7366) were not affected. Found by Kenny Paterson, 2685 Eyal Ronen and Adi Shamir. 2686 2687Features 2688 * Add new crypto primitives from RFC 7539: stream cipher Chacha20, one-time 2689 authenticator Poly1305 and AEAD construct Chacha20-Poly1305. Contributed 2690 by Daniel King. 2691 * Add support for CHACHA20-POLY1305 ciphersuites from RFC 7905. 2692 * Add platform support for the Haiku OS. (https://www.haiku-os.org). 2693 Contributed by Augustin Cavalier. 2694 * Make the receive and transmit buffers independent sizes, for situations 2695 where the outgoing buffer can be fixed at a smaller size than the incoming 2696 buffer, which can save some RAM. If buffer lengths are kept equal, there 2697 is no functional difference. Contributed by Angus Gratton, and also 2698 independently contributed again by Paul Sokolovsky. 2699 * Add support for key wrapping modes based on AES as defined by 2700 NIST SP 800-38F algorithms KW and KWP and by RFC 3394 and RFC 5649. 2701 2702Bugfix 2703 * Fix the key_app_writer example which was writing a leading zero byte which 2704 was creating an invalid ASN.1 tag. Found by Aryeh R. Fixes #1257. 2705 * Fix compilation error on C++, because of a variable named new. 2706 Found and fixed by Hirotaka Niisato in #1783. 2707 * Fix "no symbols" warning issued by ranlib when building on Mac OS X. Fix 2708 contributed by tabascoeye. 2709 * Clarify documentation for mbedtls_ssl_write() to include 0 as a valid 2710 return value. Found by @davidwu2000. #839 2711 * Fix a memory leak in mbedtls_x509_csr_parse(), found by catenacyber, 2712 Philippe Antoine. Fixes #1623. 2713 * Remove unused headers included in x509.c. Found by Chris Hanson and fixed 2714 by Brendan Shanks. Part of a fix for #992. 2715 * Fix compilation error when MBEDTLS_ARC4_C is disabled and 2716 MBEDTLS_CIPHER_NULL_CIPHER is enabled. Found by TrinityTonic in #1719. 2717 * Added length checks to some TLS parsing functions. Found and fixed by 2718 Philippe Antoine from Catena cyber. #1663. 2719 * Fix the inline assembly for the MPI multiply helper function for i386 and 2720 i386 with SSE2. Found by László Langó. Fixes #1550 2721 * Fix namespacing in header files. Remove the `mbedtls` namespacing in 2722 the `#include` in the header files. Resolves #857 2723 * Fix compiler warning of 'use before initialisation' in 2724 mbedtls_pk_parse_key(). Found by Martin Boye Petersen and fixed by Dawid 2725 Drozd. #1098 2726 * Fix decryption for zero length messages (which contain all padding) when a 2727 CBC based ciphersuite is used together with Encrypt-then-MAC. Previously, 2728 such a message was wrongly reported as an invalid record and therefore lead 2729 to the connection being terminated. Seen most often with OpenSSL using 2730 TLS 1.0. Reported by @kFYatek and by Conor Murphy on the forum. Fix 2731 contributed by Espressif Systems. Fixes #1632 2732 * Fix ssl_client2 example to send application data with 0-length content 2733 when the request_size argument is set to 0 as stated in the documentation. 2734 Fixes #1833. 2735 * Correct the documentation for `mbedtls_ssl_get_session()`. This API has 2736 deep copy of the session, and the peer certificate is not lost. Fixes #926. 2737 * Fix build using -std=c99. Fixed by Nick Wilson. 2738 2739Changes 2740 * Fail when receiving a TLS alert message with an invalid length, or invalid 2741 zero-length messages when using TLS 1.2. Contributed by Espressif Systems. 2742 * Change the default behaviour of mbedtls_hkdf_extract() to return an error 2743 when calling with a NULL salt and non-zero salt_len. Contributed by 2744 Brian J Murray 2745 * Change the shebang line in Perl scripts to look up perl in the PATH. 2746 Contributed by fbrosson. 2747 * Allow overriding the time on Windows via the platform-time abstraction. 2748 Fixed by Nick Wilson. 2749 * Use gmtime_r/gmtime_s for thread-safety. Fixed by Nick Wilson. 2750 2751= mbed TLS 2.11.0 branch released 2018-06-18 2752 2753Features 2754 * Add additional block mode, OFB (Output Feedback), to the AES module and 2755 cipher abstraction module. 2756 * Implement the HMAC-based extract-and-expand key derivation function 2757 (HKDF) per RFC 5869. Contributed by Thomas Fossati. 2758 * Add support for the CCM* block cipher mode as defined in IEEE Std. 802.15.4. 2759 * Add support for the XTS block cipher mode with AES (AES-XTS). 2760 Contributed by Aorimn in pull request #414. 2761 * In TLS servers, support offloading private key operations to an external 2762 cryptoprocessor. Private key operations can be asynchronous to allow 2763 non-blocking operation of the TLS server stack. 2764 2765Bugfix 2766 * Fix the cert_write example to handle certificates signed with elliptic 2767 curves as well as RSA. Fixes #777 found by dbedev. 2768 * Fix for redefinition of _WIN32_WINNT to avoid overriding a definition 2769 used by user applications. Found and fixed by Fabio Alessandrelli. 2770 * Fix compilation warnings with IAR toolchain, on 32 bit platform. 2771 Reported by rahmanih in #683 2772 * Fix braces in mbedtls_memory_buffer_alloc_status(). Found by sbranden, #552. 2773 2774Changes 2775 * Changed CMake defaults for IAR to treat all compiler warnings as errors. 2776 * Changed the Clang parameters used in the CMake build files to work for 2777 versions later than 3.6. Versions of Clang earlier than this may no longer 2778 work. Fixes #1072 2779 2780= mbed TLS 2.10.0 branch released 2018-06-06 2781 2782Features 2783 * Add support for ARIA cipher (RFC 5794) and associated TLS ciphersuites 2784 (RFC 6209). Disabled by default, see MBEDTLS_ARIA_C in config.h 2785 2786API Changes 2787 * Extend the platform module with a util component that contains 2788 functionality shared by multiple Mbed TLS modules. At this stage 2789 platform_util.h (and its associated platform_util.c) only contain 2790 mbedtls_platform_zeroize(), which is a critical function from a security 2791 point of view. mbedtls_platform_zeroize() needs to be regularly tested 2792 against compilers to ensure that calls to it are not removed from the 2793 output binary as part of redundant code elimination optimizations. 2794 Therefore, mbedtls_platform_zeroize() is moved to the platform module to 2795 facilitate testing and maintenance. 2796 2797Bugfix 2798 * Fix an issue with MicroBlaze support in bn_mul.h which was causing the 2799 build to fail. Found by zv-io. Fixes #1651. 2800 2801Changes 2802 * Support TLS testing in out-of-source builds using cmake. Fixes #1193. 2803 * Fix redundant declaration of mbedtls_ssl_list_ciphersuites. Raised by 2804 TrinityTonic. #1359. 2805 2806= mbed TLS 2.9.0 branch released 2018-04-30 2807 2808Security 2809 * Fix an issue in the X.509 module which could lead to a buffer overread 2810 during certificate validation. Additionally, the issue could also lead to 2811 unnecessary callback checks being made or to some validation checks to be 2812 omitted. The overread could be triggered remotely, while the other issues 2813 would require a non DER-compliant certificate to be correctly signed by a 2814 trusted CA, or a trusted CA with a non DER-compliant certificate. Found by 2815 luocm. Fixes #825. 2816 * Fix the buffer length assertion in the ssl_parse_certificate_request() 2817 function which led to an arbitrary overread of the message buffer. The 2818 overreads could be caused by receiving a malformed message at the point 2819 where an optional signature algorithms list is expected when the signature 2820 algorithms section is too short. In builds with debug output, the overread 2821 data is output with the debug data. 2822 * Fix a client-side bug in the validation of the server's ciphersuite choice 2823 which could potentially lead to the client accepting a ciphersuite it didn't 2824 offer or a ciphersuite that cannot be used with the TLS or DTLS version 2825 chosen by the server. This could lead to corruption of internal data 2826 structures for some configurations. 2827 2828Features 2829 * Add an option, MBEDTLS_AES_FEWER_TABLES, to dynamically compute smaller AES 2830 tables during runtime, thereby reducing the RAM/ROM footprint by ~6KiB. 2831 Suggested and contributed by jkivilin in pull request #394. 2832 * Add initial support for Curve448 (RFC 7748). Only mbedtls_ecp_mul() and 2833 ECDH primitive functions (mbedtls_ecdh_gen_public(), 2834 mbedtls_ecdh_compute_shared()) are supported for now. Contributed by 2835 Nicholas Wilson in pull request #348. 2836 2837API Changes 2838 * Extend the public API with the function of mbedtls_net_poll() to allow user 2839 applications to wait for a network context to become ready before reading 2840 or writing. 2841 * Add function mbedtls_ssl_check_pending() to the public API to allow 2842 a check for whether more more data is pending to be processed in the 2843 internal message buffers. 2844 This function is necessary to determine when it is safe to idle on the 2845 underlying transport in case event-driven IO is used. 2846 2847Bugfix 2848 * Fix a spurious uninitialized variable warning in cmac.c. Fix independently 2849 contributed by Brian J Murray and David Brown. 2850 * Add missing dependencies in test suites that led to build failures 2851 in configurations that omit certain hashes or public-key algorithms. 2852 Fixes #1040. 2853 * Fix C89 incompatibility in benchmark.c. Contributed by Brendan Shanks. 2854 #1353 2855 * Add missing dependencies for MBEDTLS_HAVE_TIME_DATE and 2856 MBEDTLS_VERSION_FEATURES in some test suites. Contributed by 2857 Deomid Ryabkov. Fixes #1299, #1475. 2858 * Fix the Makefile build process for building shared libraries on Mac OS X. 2859 Fixed by mnacamura. 2860 * Fix parsing of PKCS#8 encoded Elliptic Curve keys. Previously Mbed TLS was 2861 unable to parse keys which had only the optional parameters field of the 2862 ECPrivateKey structure. Found by Jethro Beekman, fixed in #1379. 2863 * Return the plaintext data more quickly on unpadded CBC decryption, as 2864 stated in the mbedtls_cipher_update() documentation. Contributed by 2865 Andy Leiserson. 2866 * Fix overriding and ignoring return values when parsing and writing to 2867 a file in pk_sign program. Found by kevlut in #1142. 2868 * Restrict usage of error code MBEDTLS_ERR_SSL_WANT_READ to situations 2869 where data needs to be fetched from the underlying transport in order 2870 to make progress. Previously, this error code was also occasionally 2871 returned when unexpected messages were being discarded, ignoring that 2872 further messages could potentially already be pending to be processed 2873 in the internal buffers; these cases led to deadlocks when event-driven 2874 I/O was used. Found and reported by Hubert Mis in #772. 2875 * Fix buffer length assertions in the ssl_parse_certificate_request() 2876 function which leads to a potential one byte overread of the message 2877 buffer. 2878 * Fix invalid buffer sizes passed to zlib during record compression and 2879 decompression. 2880 * Fix the soversion of libmbedcrypto to match the soversion of the 2881 maintained 2.7 branch. The soversion was increased in Mbed TLS 2882 version 2.7.1 to reflect breaking changes in that release, but the 2883 increment was missed in 2.8.0 and later releases outside of the 2.7 branch. 2884 2885Changes 2886 * Remove some redundant code in bignum.c. Contributed by Alexey Skalozub. 2887 * Support cmake builds where Mbed TLS is a subproject. Fix contributed 2888 independently by Matthieu Volat and Arne Schwabe. 2889 * Improve testing in configurations that omit certain hashes or 2890 public-key algorithms. Includes contributions by Gert van Dijk. 2891 * Improve negative testing of X.509 parsing. 2892 * Do not define global mutexes around readdir() and gmtime() in 2893 configurations where the feature is disabled. Found and fixed by Gergely 2894 Budai. 2895 * Harden the function mbedtls_ssl_config_free() against misuse, so that it 2896 doesn't leak memory if the user doesn't use mbedtls_ssl_conf_psk() and 2897 instead incorrectly manipulates the configuration structure directly. 2898 Found and fix submitted by junyeonLEE in #1220. 2899 * Provide an empty implementation of mbedtls_pkcs5_pbes2() when 2900 MBEDTLS_ASN1_PARSE_C is not enabled. This allows the use of PBKDF2 2901 without PBES2. Fixed by Marcos Del Sol Vives. 2902 * Add the order of the base point as N in the mbedtls_ecp_group structure 2903 for Curve25519 (other curves had it already). Contributed by Nicholas 2904 Wilson #481 2905 * Improve the documentation of mbedtls_net_accept(). Contributed by Ivan 2906 Krylov. 2907 * Improve the documentation of mbedtls_ssl_write(). Suggested by 2908 Paul Sokolovsky in #1356. 2909 * Add an option in the Makefile to support ar utilities where the operation 2910 letter must not be prefixed by '-', such as LLVM. Found and fixed by 2911 Alex Hixon. 2912 * Allow configuring the shared library extension by setting the DLEXT 2913 environment variable when using the project makefiles. 2914 * Optimize unnecessary zeroing in mbedtls_mpi_copy. Based on a contribution 2915 by Alexey Skalozub in #405. 2916 * In the SSL module, when f_send, f_recv or f_recv_timeout report 2917 transmitting more than the required length, return an error. Raised by 2918 Sam O'Connor in #1245. 2919 * Improve robustness of mbedtls_ssl_derive_keys against the use of 2920 HMAC functions with non-HMAC ciphersuites. Independently contributed 2921 by Jiayuan Chen in #1377. Fixes #1437. 2922 * Improve security of RSA key generation by including criteria from 2923 FIPS 186-4. Contributed by Jethro Beekman. #1380 2924 * Declare functions in header files even when an alternative implementation 2925 of the corresponding module is activated by defining the corresponding 2926 MBEDTLS_XXX_ALT macro. This means that alternative implementations do 2927 not need to copy the declarations, and ensures that they will have the 2928 same API. 2929 * Add platform setup and teardown calls in test suites. 2930 2931= mbed TLS 2.8.0 branch released 2018-03-16 2932 2933Default behavior changes 2934 * The truncated HMAC extension now conforms to RFC 6066. This means 2935 that when both sides of a TLS connection negotiate the truncated 2936 HMAC extension, Mbed TLS can now interoperate with other 2937 compliant implementations, but this breaks interoperability with 2938 prior versions of Mbed TLS. To restore the old behavior, enable 2939 the (deprecated) option MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT in 2940 config.h. Found by Andreas Walz (ivESK, Offenburg University of 2941 Applied Sciences). 2942 2943Security 2944 * Fix implementation of the truncated HMAC extension. The previous 2945 implementation allowed an offline 2^80 brute force attack on the 2946 HMAC key of a single, uninterrupted connection (with no 2947 resumption of the session). 2948 * Verify results of RSA private key operations to defend 2949 against Bellcore glitch attack. 2950 * Fix a buffer overread in ssl_parse_server_key_exchange() that could cause 2951 a crash on invalid input. 2952 * Fix a buffer overread in ssl_parse_server_psk_hint() that could cause a 2953 crash on invalid input. 2954 * Fix CRL parsing to reject CRLs containing unsupported critical 2955 extensions. Found by Falko Strenzke and Evangelos Karatsiolis. 2956 2957Features 2958 * Extend PKCS#8 interface by introducing support for the entire SHA 2959 algorithms family when encrypting private keys using PKCS#5 v2.0. 2960 This allows reading encrypted PEM files produced by software that 2961 uses PBKDF2-SHA2, such as OpenSSL 1.1. Submitted by Antonio Quartulli, 2962 OpenVPN Inc. Fixes #1339 2963 * Add support for public keys encoded in PKCS#1 format. #1122 2964 2965New deprecations 2966 * Deprecate support for record compression (configuration option 2967 MBEDTLS_ZLIB_SUPPORT). 2968 2969Bugfix 2970 * Fix the name of a DHE parameter that was accidentally changed in 2.7.0. 2971 Fixes #1358. 2972 * Fix test_suite_pk to work on 64-bit ILP32 systems. #849 2973 * Fix mbedtls_x509_crt_profile_suiteb, which used to reject all certificates 2974 with flag MBEDTLS_X509_BADCERT_BAD_PK even when the key type was correct. 2975 In the context of SSL, this resulted in handshake failure. Reported by 2976 daniel in the Mbed TLS forum. #1351 2977 * Fix Windows x64 builds with the included mbedTLS.sln file. #1347 2978 * Fix setting version TLSv1 as minimal version, even if TLS 1 2979 is not enabled. Set MBEDTLS_SSL_MIN_MAJOR_VERSION 2980 and MBEDTLS_SSL_MIN_MINOR_VERSION instead of 2981 MBEDTLS_SSL_MAJOR_VERSION_3 and MBEDTLS_SSL_MINOR_VERSION_1. #664 2982 * Fix compilation error on Mingw32 when _TRUNCATE is defined. Use _TRUNCATE 2983 only if __MINGW32__ not defined. Fix suggested by Thomas Glanzmann and 2984 Nick Wilson on issue #355 2985 * In test_suite_pk, pass valid parameters when testing for hash length 2986 overflow. #1179 2987 * Fix memory allocation corner cases in memory_buffer_alloc.c module. Found 2988 by Guido Vranken. #639 2989 * Log correct number of ciphersuites used in Client Hello message. #918 2990 * Fix X509 CRT parsing that would potentially accept an invalid tag when 2991 parsing the subject alternative names. 2992 * Fix a possible arithmetic overflow in ssl_parse_server_key_exchange() 2993 that could cause a key exchange to fail on valid data. 2994 * Fix a possible arithmetic overflow in ssl_parse_server_psk_hint() that 2995 could cause a key exchange to fail on valid data. 2996 * Don't define mbedtls_aes_decrypt and mbedtls_aes_encrypt under 2997 MBEDTLS_DEPRECATED_REMOVED. #1388 2998 * Fix a 1-byte heap buffer overflow (read-only) during private key parsing. 2999 Found through fuzz testing. 3000 3001Changes 3002 * Fix tag lengths and value ranges in the documentation of CCM encryption. 3003 Contributed by Mathieu Briand. 3004 * Fix typo in a comment ctr_drbg.c. Contributed by Paul Sokolovsky. 3005 * Remove support for the library reference configuration for picocoin. 3006 * MD functions deprecated in 2.7.0 are no longer inline, to provide 3007 a migration path for those depending on the library's ABI. 3008 * Clarify the documentation of mbedtls_ssl_setup. 3009 * Use (void) when defining functions with no parameters. Contributed by 3010 Joris Aerts. #678 3011 3012= mbed TLS 2.7.0 branch released 2018-02-03 3013 3014Security 3015 * Fix a heap corruption issue in the implementation of the truncated HMAC 3016 extension. When the truncated HMAC extension is enabled and CBC is used, 3017 sending a malicious application packet could be used to selectively corrupt 3018 6 bytes on the peer's heap, which could potentially lead to crash or remote 3019 code execution. The issue could be triggered remotely from either side in 3020 both TLS and DTLS. CVE-2018-0488 3021 * Fix a buffer overflow in RSA-PSS verification when the hash was too large 3022 for the key size, which could potentially lead to crash or remote code 3023 execution. Found by Seth Terashima, Qualcomm Product Security Initiative, 3024 Qualcomm Technologies Inc. CVE-2018-0487 3025 * Fix buffer overflow in RSA-PSS verification when the unmasked data is all 3026 zeros. 3027 * Fix an unsafe bounds check in ssl_parse_client_psk_identity() when adding 3028 64 KiB to the address of the SSL buffer and causing a wrap around. 3029 * Fix a potential heap buffer overflow in mbedtls_ssl_write(). When the (by 3030 default enabled) maximum fragment length extension is disabled in the 3031 config and the application data buffer passed to mbedtls_ssl_write 3032 is larger than the internal message buffer (16384 bytes by default), the 3033 latter overflows. The exploitability of this issue depends on whether the 3034 application layer can be forced into sending such large packets. The issue 3035 was independently reported by Tim Nordell via e-mail and by Florin Petriuc 3036 and sjorsdewit on GitHub. Fix proposed by Florin Petriuc in #1022. 3037 Fixes #707. 3038 * Add a provision to prevent compiler optimizations breaking the time 3039 constancy of mbedtls_ssl_safer_memcmp(). 3040 * Ensure that buffers are cleared after use if they contain sensitive data. 3041 Changes were introduced in multiple places in the library. 3042 * Set PEM buffer to zero before freeing it, to avoid decoded private keys 3043 being leaked to memory after release. 3044 * Fix dhm_check_range() failing to detect trivial subgroups and potentially 3045 leaking 1 bit of the private key. Reported by prashantkspatil. 3046 * Make mbedtls_mpi_read_binary() constant-time with respect to the input 3047 data. Previously, trailing zero bytes were detected and omitted for the 3048 sake of saving memory, but potentially leading to slight timing 3049 differences. Reported by Marco Macchetti, Kudelski Group. 3050 * Wipe stack buffer temporarily holding EC private exponent 3051 after keypair generation. 3052 * Fix a potential heap buffer over-read in ALPN extension parsing 3053 (server-side). Could result in application crash, but only if an ALPN 3054 name larger than 16 bytes had been configured on the server. 3055 * Change default choice of DHE parameters from untrustworthy RFC 5114 3056 to RFC 3526 containing parameters generated in a nothing-up-my-sleeve 3057 manner. 3058 3059Features 3060 * Allow comments in test data files. 3061 * The selftest program can execute a subset of the tests based on command 3062 line arguments. 3063 * New unit tests for timing. Improve the self-test to be more robust 3064 when run on a heavily-loaded machine. 3065 * Add alternative implementation support for CCM and CMAC (MBEDTLS_CCM_ALT, 3066 MBEDTLS_CMAC_ALT). Submitted by Steven Cooreman, Silicon Labs. 3067 * Add support for alternative implementations of GCM, selected by the 3068 configuration flag MBEDTLS_GCM_ALT. 3069 * Add support for alternative implementations for ECDSA, controlled by new 3070 configuration flags MBEDTLS_ECDSA_SIGN_ALT, MBEDTLS_ECDSA_VERIFY_ALT and 3071 MBEDTLS_ECDSDA_GENKEY_AT in config.h. 3072 The following functions from the ECDSA module can be replaced 3073 with alternative implementation: 3074 mbedtls_ecdsa_sign(), mbedtls_ecdsa_verify() and mbedtls_ecdsa_genkey(). 3075 * Add support for alternative implementation of ECDH, controlled by the 3076 new configuration flags MBEDTLS_ECDH_COMPUTE_SHARED_ALT and 3077 MBEDTLS_ECDH_GEN_PUBLIC_ALT in config.h. 3078 The following functions from the ECDH module can be replaced 3079 with an alternative implementation: 3080 mbedtls_ecdh_gen_public() and mbedtls_ecdh_compute_shared(). 3081 * Add support for alternative implementation of ECJPAKE, controlled by 3082 the new configuration flag MBEDTLS_ECJPAKE_ALT. 3083 * Add mechanism to provide alternative implementation of the DHM module. 3084 3085API Changes 3086 * Extend RSA interface by multiple functions allowing structure- 3087 independent setup and export of RSA contexts. Most notably, 3088 mbedtls_rsa_import() and mbedtls_rsa_complete() are introduced for setting 3089 up RSA contexts from partial key material and having them completed to the 3090 needs of the implementation automatically. This allows to setup private RSA 3091 contexts from keys consisting of N,D,E only, even if P,Q are needed for the 3092 purpose or CRT and/or blinding. 3093 * The configuration option MBEDTLS_RSA_ALT can be used to define alternative 3094 implementations of the RSA interface declared in rsa.h. 3095 * The following functions in the message digest modules (MD2, MD4, MD5, 3096 SHA1, SHA256, SHA512) have been deprecated and replaced as shown below. 3097 The new functions change the return type from void to int to allow 3098 returning error codes when using MBEDTLS_<MODULE>_ALT. 3099 mbedtls_<MODULE>_starts() -> mbedtls_<MODULE>_starts_ret() 3100 mbedtls_<MODULE>_update() -> mbedtls_<MODULE>_update_ret() 3101 mbedtls_<MODULE>_finish() -> mbedtls_<MODULE>_finish_ret() 3102 mbedtls_<MODULE>_process() -> mbedtls_internal_<MODULE>_process() 3103 3104New deprecations 3105 * Deprecate usage of RSA primitives with non-matching key-type 3106 (e.g. signing with a public key). 3107 * Direct manipulation of structure fields of RSA contexts is deprecated. 3108 Users are advised to use the extended RSA API instead. 3109 * Deprecate usage of message digest functions that return void 3110 (mbedtls_<MODULE>_starts, mbedtls_<MODULE>_update, 3111 mbedtls_<MODULE>_finish and mbedtls_<MODULE>_process where <MODULE> is 3112 any of MD2, MD4, MD5, SHA1, SHA256, SHA512) in favor of functions 3113 that can return an error code. 3114 * Deprecate untrustworthy DHE parameters from RFC 5114. Superseded by 3115 parameters from RFC 3526 or the newly added parameters from RFC 7919. 3116 * Deprecate hex string DHE constants MBEDTLS_DHM_RFC3526_MODP_2048_P etc. 3117 Supserseded by binary encoded constants MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN 3118 etc. 3119 * Deprecate mbedtls_ssl_conf_dh_param() for setting default DHE parameters 3120 from hex strings. Superseded by mbedtls_ssl_conf_dh_param_bin() 3121 accepting DHM parameters in binary form, matching the new constants. 3122 3123Bugfix 3124 * Fix ssl_parse_record_header() to silently discard invalid DTLS records 3125 as recommended in RFC 6347 Section 4.1.2.7. 3126 * Fix memory leak in mbedtls_ssl_set_hostname() when called multiple times. 3127 Found by projectgus and Jethro Beekman, #836. 3128 * Fix usage help in ssl_server2 example. Found and fixed by Bei Lin. 3129 * Parse signature algorithm extension when renegotiating. Previously, 3130 renegotiated handshakes would only accept signatures using SHA-1 3131 regardless of the peer's preferences, or fail if SHA-1 was disabled. 3132 * Fix leap year calculation in x509_date_is_valid() to ensure that invalid 3133 dates on leap years with 100 and 400 intervals are handled correctly. Found 3134 by Nicholas Wilson. #694 3135 * Fix some invalid RSA-PSS signatures with keys of size 8N+1 that were 3136 accepted. Generating these signatures required the private key. 3137 * Fix out-of-memory problem when parsing 4096-bit PKCS8-encrypted RSA keys. 3138 Found independently by Florian in the mbed TLS forum and by Mishamax. 3139 #878, #1019. 3140 * Fix variable used before assignment compilation warnings with IAR 3141 toolchain. Found by gkerrien38. 3142 * Fix unchecked return codes from AES, DES and 3DES functions in 3143 pem_aes_decrypt(), pem_des_decrypt() and pem_des3_decrypt() respectively. 3144 If a call to one of the functions of the cryptographic primitive modules 3145 failed, the error may not be noticed by the function 3146 mbedtls_pem_read_buffer() causing it to return invalid values. Found by 3147 Guido Vranken. #756 3148 * Include configuration file in md.h, to fix compilation warnings. 3149 Reported by aaronmdjones in #1001 3150 * Correct extraction of signature-type from PK instance in X.509 CRT and CSR 3151 writing routines that prevented these functions to work with alternative 3152 RSA implementations. Raised by J.B. in the Mbed TLS forum. Fixes #1011. 3153 * Don't print X.509 version tag for v1 CRT's, and omit extensions for 3154 non-v3 CRT's. 3155 * Fix bugs in RSA test suite under MBEDTLS_NO_PLATFORM_ENTROPY. #1023 #1024 3156 * Fix net_would_block() to avoid modification by errno through fcntl() call. 3157 Found by nkolban. Fixes #845. 3158 * Fix handling of handshake messages in mbedtls_ssl_read() in case 3159 MBEDTLS_SSL_RENEGOTIATION is disabled. Found by erja-gp. 3160 * Add a check for invalid private parameters in mbedtls_ecdsa_sign(). 3161 Reported by Yolan Romailler. 3162 * Fix word size check in in pk.c to not depend on MBEDTLS_HAVE_INT64. 3163 * Fix incorrect unit in benchmark output. #850 3164 * Add size-checks for record and handshake message content, securing 3165 fragile yet non-exploitable code-paths. 3166 * Fix crash when calling mbedtls_ssl_cache_free() twice. Found by 3167 MilenkoMitrovic, #1104 3168 * Fix mbedtls_timing_alarm(0) on Unix and MinGW. 3169 * Fix use of uninitialized memory in mbedtls_timing_get_timer() when reset=1. 3170 * Fix possible memory leaks in mbedtls_gcm_self_test(). 3171 * Added missing return code checks in mbedtls_aes_self_test(). 3172 * Fix issues in RSA key generation program programs/x509/rsa_genkey and the 3173 RSA test suite where the failure of CTR DRBG initialization lead to 3174 freeing an RSA context and several MPI's without proper initialization 3175 beforehand. 3176 * Fix error message in programs/pkey/gen_key.c. Found and fixed by Chris Xue. 3177 * Fix programs/pkey/dh_server.c so that it actually works with dh_client.c. 3178 Found and fixed by Martijn de Milliano. 3179 * Fix an issue in the cipher decryption with the mode 3180 MBEDTLS_PADDING_ONE_AND_ZEROS that sometimes accepted invalid padding. 3181 Note, this padding mode is not used by the TLS protocol. Found and fixed by 3182 Micha Kraus. 3183 * Fix the entropy.c module to not call mbedtls_sha256_starts() or 3184 mbedtls_sha512_starts() in the mbedtls_entropy_init() function. 3185 * Fix the entropy.c module to ensure that mbedtls_sha256_init() or 3186 mbedtls_sha512_init() is called before operating on the relevant context 3187 structure. Do not assume that zeroizing a context is a correct way to 3188 reset it. Found independently by ccli8 on Github. 3189 * In mbedtls_entropy_free(), properly free the message digest context. 3190 * Fix status handshake status message in programs/ssl/dtls_client.c. Found 3191 and fixed by muddog. 3192 3193Changes 3194 * Extend cert_write example program by options to set the certificate version 3195 and the message digest. Further, allow enabling/disabling of authority 3196 identifier, subject identifier and basic constraints extensions. 3197 * Only check for necessary RSA structure fields in `mbedtls_rsa_private`. In 3198 particular, don't require P,Q if neither CRT nor blinding are 3199 used. Reported and fix proposed independently by satur9nine and sliai 3200 on GitHub. 3201 * Only run AES-192 self-test if AES-192 is available. Fixes #963. 3202 * Tighten the RSA PKCS#1 v1.5 signature verification code and remove the 3203 undeclared dependency of the RSA module on the ASN.1 module. 3204 * Update all internal usage of deprecated message digest functions to the 3205 new ones with return codes. In particular, this modifies the 3206 mbedtls_md_info_t structure. Propagate errors from these functions 3207 everywhere except some locations in the ssl_tls.c module. 3208 * Improve CTR_DRBG error handling by propagating underlying AES errors. 3209 * Add MBEDTLS_ERR_XXX_HW_ACCEL_FAILED error codes for all cryptography 3210 modules where the software implementation can be replaced by a hardware 3211 implementation. 3212 * Add explicit warnings for the use of MD2, MD4, MD5, SHA-1, DES and ARC4 3213 throughout the library. 3214 3215= mbed TLS 2.6.0 branch released 2017-08-10 3216 3217Security 3218 * Fix authentication bypass in SSL/TLS: when authmode is set to optional, 3219 mbedtls_ssl_get_verify_result() would incorrectly return 0 when the peer's 3220 X.509 certificate chain had more than MBEDTLS_X509_MAX_INTERMEDIATE_CA 3221 (default: 8) intermediates, even when it was not trusted. This could be 3222 triggered remotely from either side. (With authmode set to 'required' 3223 (the default), the handshake was correctly aborted). 3224 * Reliably wipe sensitive data after use in the AES example applications 3225 programs/aes/aescrypt2 and programs/aes/crypt_and_hash. 3226 Found by Laurent Simon. 3227 3228Features 3229 * Add the functions mbedtls_platform_setup() and mbedtls_platform_teardown() 3230 and the context struct mbedtls_platform_context to perform 3231 platform-specific setup and teardown operations. The macro 3232 MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT allows the functions to be overridden 3233 by the user in a platform_alt.h file. These new functions are required in 3234 some embedded environments to provide a means of initialising underlying 3235 cryptographic acceleration hardware. 3236 3237API Changes 3238 * Reverted API/ABI breaking changes introduced in mbed TLS 2.5.1, to make the 3239 API consistent with mbed TLS 2.5.0. Specifically removed the inline 3240 qualifier from the functions mbedtls_aes_decrypt, mbedtls_aes_encrypt, 3241 mbedtls_ssl_ciphersuite_uses_ec and mbedtls_ssl_ciphersuite_uses_psk. Found 3242 by James Cowgill. #978 3243 * Certificate verification functions now set flags to -1 in case the full 3244 chain was not verified due to an internal error (including in the verify 3245 callback) or chain length limitations. 3246 * With authmode set to optional, the TLS handshake is now aborted if the 3247 verification of the peer's certificate failed due to an overlong chain or 3248 a fatal error in the verify callback. 3249 3250Bugfix 3251 * Add a check if iv_len is zero in GCM, and return an error if it is zero. 3252 Reported by roberto. #716 3253 * Replace preprocessor condition from #if defined(MBEDTLS_THREADING_PTHREAD) 3254 to #if defined(MBEDTLS_THREADING_C) as the library cannot assume they will 3255 always be implemented by pthread support. #696 3256 * Fix a resource leak on Windows platforms in mbedtls_x509_crt_parse_path(), 3257 in the case of an error. Found by redplait. #590 3258 * Add MBEDTLS_MPI_CHK to check for error value of mbedtls_mpi_fill_random. 3259 Reported and fix suggested by guidovranken. #740 3260 * Fix conditional preprocessor directives in bignum.h to enable 64-bit 3261 compilation when using ARM Compiler 6. 3262 * Fix a potential integer overflow in the version verification for DER 3263 encoded X.509 CRLs. The overflow could enable maliciously constructed CRLs 3264 to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin, 3265 KNOX Security, Samsung Research America 3266 * Fix potential integer overflow in the version verification for DER 3267 encoded X.509 CSRs. The overflow could enable maliciously constructed CSRs 3268 to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin, 3269 KNOX Security, Samsung Research America 3270 * Fix a potential integer overflow in the version verification for DER 3271 encoded X.509 certificates. The overflow could enable maliciously 3272 constructed certificates to bypass the certificate verification check. 3273 * Fix a call to the libc function time() to call the platform abstraction 3274 function mbedtls_time() instead. Found by wairua. #666 3275 * Avoid shadowing of time and index functions through mbed TLS function 3276 arguments. Found by inestlerode. #557. 3277 3278Changes 3279 * Added config.h option MBEDTLS_NO_UDBL_DIVISION, to prevent the use of 3280 64-bit division. This is useful on embedded platforms where 64-bit division 3281 created a dependency on external libraries. #708 3282 * Removed mutexes from ECP hardware accelerator code. Now all hardware 3283 accelerator code in the library leaves concurrency handling to the 3284 platform. Reported by Steven Cooreman. #863 3285 * Define the macro MBEDTLS_AES_ROM_TABLES in the configuration file 3286 config-no-entropy.h to reduce the RAM footprint. 3287 * Added a test script that can be hooked into git that verifies commits 3288 before they are pushed. 3289 * Improve documentation of PKCS1 decryption functions. 3290 3291= mbed TLS 2.5.1 released 2017-06-21 3292 3293Security 3294 * Fixed unlimited overread of heap-based buffer in mbedtls_ssl_read(). 3295 The issue could only happen client-side with renegotiation enabled. 3296 Could result in DoS (application crash) or information leak 3297 (if the application layer sent data read from mbedtls_ssl_read() 3298 back to the server or to a third party). Can be triggered remotely. 3299 * Removed SHA-1 and RIPEMD-160 from the default hash algorithms for 3300 certificate verification. SHA-1 can be turned back on with a compile-time 3301 option if needed. 3302 * Fixed offset in FALLBACK_SCSV parsing that caused TLS server to fail to 3303 detect it sometimes. Reported by Hugo Leisink. #810 3304 * Tighten parsing of RSA PKCS#1 v1.5 signatures, to avoid a 3305 potential Bleichenbacher/BERserk-style attack. 3306 3307Bugfix 3308 * Remove size zero arrays from ECJPAKE test suite. Size zero arrays are not 3309 valid C and they prevented the test from compiling in Visual Studio 2015 3310 and with GCC using the -Wpedantic compilation option. 3311 * Fix insufficient support for signature-hash-algorithm extension, 3312 resulting in compatibility problems with Chrome. Found by hfloyrd. #823 3313 * Fix behaviour that hid the original cause of fatal alerts in some cases 3314 when sending the alert failed. The fix makes sure not to hide the error 3315 that triggered the alert. 3316 * Fix SSLv3 renegotiation behaviour and stop processing data received from 3317 peer after sending a fatal alert to refuse a renegotiation attempt. 3318 Previous behaviour was to keep processing data even after the alert has 3319 been sent. 3320 * Accept empty trusted CA chain in authentication mode 3321 MBEDTLS_SSL_VERIFY_OPTIONAL. Found by Jethro Beekman. #864 3322 * Fix implementation of mbedtls_ssl_parse_certificate() to not annihilate 3323 fatal errors in authentication mode MBEDTLS_SSL_VERIFY_OPTIONAL and to 3324 reflect bad EC curves within verification result. 3325 * Fix bug that caused the modular inversion function to accept the invalid 3326 modulus 1 and therefore to hang. Found by blaufish. #641. 3327 * Fix incorrect sign computation in modular exponentiation when the base is 3328 a negative MPI. Previously the result was always negative. Found by Guido 3329 Vranken. 3330 * Fix a numerical underflow leading to stack overflow in mpi_read_file() 3331 that was triggered uppon reading an empty line. Found by Guido Vranken. 3332 3333Changes 3334 * Send fatal alerts in more cases. The previous behaviour was to skip 3335 sending the fatal alert and just drop the connection. 3336 * Clarify ECDSA documentation and improve the sample code to avoid 3337 misunderstanding and potentially dangerous use of the API. Pointed out 3338 by Jean-Philippe Aumasson. 3339 3340= mbed TLS 2.5.0 branch released 2017-05-17 3341 3342Security 3343 * Wipe stack buffers in RSA private key operations 3344 (rsa_rsaes_pkcs1_v15_decrypt(), rsa_rsaes_oaep_decrypt). Found by Laurent 3345 Simon. 3346 * Add exponent blinding to RSA private operations as a countermeasure 3347 against side-channel attacks like the cache attack described in 3348 https://arxiv.org/abs/1702.08719v2. 3349 Found and fix proposed by Michael Schwarz, Samuel Weiser, Daniel Gruss, 3350 Clémentine Maurice and Stefan Mangard. 3351 3352Features 3353 * Add hardware acceleration support for the Elliptic Curve Point module. 3354 This involved exposing parts of the internal interface to enable 3355 replacing the core functions and adding and alternative, module level 3356 replacement support for enabling the extension of the interface. 3357 * Add a new configuration option to 'mbedtls_ssl_config' to enable 3358 suppressing the CA list in Certificate Request messages. The default 3359 behaviour has not changed, namely every configured CAs name is included. 3360 3361API Changes 3362 * The following functions in the AES module have been deprecated and replaced 3363 by the functions shown below. The new functions change the return type from 3364 void to int to allow returning error codes when using MBEDTLS_AES_ALT, 3365 MBEDTLS_AES_DECRYPT_ALT or MBEDTLS_AES_ENCRYPT_ALT. 3366 mbedtls_aes_decrypt() -> mbedtls_internal_aes_decrypt() 3367 mbedtls_aes_encrypt() -> mbedtls_internal_aes_encrypt() 3368 3369Bugfix 3370 * Remove macros from compat-1.3.h that correspond to deleted items from most 3371 recent versions of the library. Found by Kyle Keen. 3372 * Fixed issue in the Threading module that prevented mutexes from 3373 initialising. Found by sznaider. #667 #843 3374 * Add checks in the PK module for the RSA functions on 64-bit systems. 3375 The PK and RSA modules use different types for passing hash length and 3376 without these checks the type cast could lead to data loss. Found by Guido 3377 Vranken. 3378 3379= mbed TLS 2.4.2 branch released 2017-03-08 3380 3381Security 3382 * Add checks to prevent signature forgeries for very large messages while 3383 using RSA through the PK module in 64-bit systems. The issue was caused by 3384 some data loss when casting a size_t to an unsigned int value in the 3385 functions rsa_verify_wrap(), rsa_sign_wrap(), rsa_alt_sign_wrap() and 3386 mbedtls_pk_sign(). Found by Jean-Philippe Aumasson. 3387 * Fixed potential livelock during the parsing of a CRL in PEM format in 3388 mbedtls_x509_crl_parse(). A string containing a CRL followed by trailing 3389 characters after the footer could result in the execution of an infinite 3390 loop. The issue can be triggered remotely. Found by Greg Zaverucha, 3391 Microsoft. 3392 * Removed MD5 from the allowed hash algorithms for CertificateRequest and 3393 CertificateVerify messages, to prevent SLOTH attacks against TLS 1.2. 3394 Introduced by interoperability fix for #513. 3395 * Fixed a bug that caused freeing a buffer that was allocated on the stack, 3396 when verifying the validity of a key on secp224k1. This could be 3397 triggered remotely for example with a maliciously constructed certificate 3398 and potentially could lead to remote code execution on some platforms. 3399 Reported independently by rongsaws and Aleksandar Nikolic, Cisco Talos 3400 team. #569 CVE-2017-2784 3401 3402Bugfix 3403 * Fix output certificate verification flags set by x509_crt_verify_top() when 3404 traversing a chain of trusted CA. The issue would cause both flags, 3405 MBEDTLS_X509_BADCERT_NOT_TRUSTED and MBEDTLS_X509_BADCERT_EXPIRED, to be 3406 set when the verification conditions are not met regardless of the cause. 3407 Found by Harm Verhagen and inestlerode. #665 #561 3408 * Fix the redefinition of macro ssl_set_bio to an undefined symbol 3409 mbedtls_ssl_set_bio_timeout in compat-1.3.h, by removing it. 3410 Found by omlib-lin. #673 3411 * Fix unused variable/function compilation warnings in pem.c, x509_crt.c and 3412 x509_csr.c that are reported when building mbed TLS with a config.h that 3413 does not define MBEDTLS_PEM_PARSE_C. Found by omnium21. #562 3414 * Fix incorrect renegotiation condition in ssl_check_ctr_renegotiate() that 3415 would compare 64 bits of the record counter instead of 48 bits as indicated 3416 in RFC 6347 Section 4.3.1. This could cause the execution of the 3417 renegotiation routines at unexpected times when the protocol is DTLS. Found 3418 by wariua. #687 3419 * Fixed multiple buffer overreads in mbedtls_pem_read_buffer() when parsing 3420 the input string in PEM format to extract the different components. Found 3421 by Eyal Itkin. 3422 * Fixed potential arithmetic overflow in mbedtls_ctr_drbg_reseed() that could 3423 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 3424 * Fixed potential arithmetic overflows in mbedtls_cipher_update() that could 3425 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 3426 * Fixed potential arithmetic overflow in mbedtls_md2_update() that could 3427 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 3428 * Fixed potential arithmetic overflow in mbedtls_base64_decode() that could 3429 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 3430 * Fixed heap overreads in mbedtls_x509_get_time(). Found by Peng 3431 Li/Yueh-Hsun Lin, KNOX Security, Samsung Research America. 3432 * Fix potential memory leak in mbedtls_x509_crl_parse(). The leak was caused 3433 by missing calls to mbedtls_pem_free() in cases when a 3434 MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT error was encountered. Found and 3435 fix proposed by Guido Vranken. #722 3436 * Fixed the templates used to generate project and solution files for Visual 3437 Studio 2015 as well as the files themselves, to remove a build warning 3438 generated in Visual Studio 2015. Reported by Steve Valliere. #742 3439 * Fix a resource leak in ssl_cookie, when using MBEDTLS_THREADING_C. 3440 Raised and fix suggested by Alan Gillingham in the mbed TLS forum. #771 3441 * Fix 1 byte buffer overflow in mbedtls_mpi_write_string() when the MPI 3442 number to write in hexadecimal is negative and requires an odd number of 3443 digits. Found and fixed by Guido Vranken. 3444 * Fix unlisted DES configuration dependency in some pkparse test cases. Found 3445 by inestlerode. #555 3446 3447= mbed TLS 2.4.1 branch released 2016-12-13 3448 3449Changes 3450 * Update to CMAC test data, taken from - NIST Special Publication 800-38B - 3451 Recommendation for Block Cipher Modes of Operation: The CMAC Mode for 3452 Authentication – October 2016 3453 3454= mbed TLS 2.4.0 branch released 2016-10-17 3455 3456Security 3457 * Removed the MBEDTLS_SSL_AEAD_RANDOM_IV option, because it was not compliant 3458 with RFC-5116 and could lead to session key recovery in very long TLS 3459 sessions. "Nonce-Disrespecting Adversaries Practical Forgery Attacks on GCM in 3460 TLS" - H. Bock, A. Zauner, S. Devlin, J. Somorovsky, P. Jovanovic. 3461 https://eprint.iacr.org/2016/475.pdf 3462 * Fixed potential stack corruption in mbedtls_x509write_crt_der() and 3463 mbedtls_x509write_csr_der() when the signature is copied to the buffer 3464 without checking whether there is enough space in the destination. The 3465 issue cannot be triggered remotely. Found by Jethro Beekman. 3466 3467Features 3468 * Added support for CMAC for AES and 3DES and AES-CMAC-PRF-128, as defined by 3469 NIST SP 800-38B, RFC-4493 and RFC-4615. 3470 * Added hardware entropy selftest to verify that the hardware entropy source 3471 is functioning correctly. 3472 * Added a script to print build environment info for diagnostic use in test 3473 scripts, which is also now called by all.sh. 3474 * Added the macro MBEDTLS_X509_MAX_FILE_PATH_LEN that enables the user to 3475 configure the maximum length of a file path that can be buffered when 3476 calling mbedtls_x509_crt_parse_path(). 3477 * Added a configuration file config-no-entropy.h that configures the subset of 3478 library features that do not require an entropy source. 3479 * Added the macro MBEDTLS_ENTROPY_MIN_HARDWARE in config.h. This allows users 3480 to configure the minimum number of bytes for entropy sources using the 3481 mbedtls_hardware_poll() function. 3482 3483Bugfix 3484 * Fix for platform time abstraction to avoid dependency issues where a build 3485 may need time but not the standard C library abstraction, and added 3486 configuration consistency checks to check_config.h 3487 * Fix dependency issue in Makefile to allow parallel builds. 3488 * Fix incorrect handling of block lengths in crypt_and_hash.c sample program, 3489 when GCM is used. Found by udf2457. #441 3490 * Fix for key exchanges based on ECDH-RSA or ECDH-ECDSA which weren't 3491 enabled unless others were also present. Found by David Fernandez. #428 3492 * Fix for out-of-tree builds using CMake. Found by jwurzer, and fix based on 3493 a contribution from Tobias Tangemann. #541 3494 * Fixed cert_app.c sample program for debug output and for use when no root 3495 certificates are provided. 3496 * Fix conditional statement that would cause a 1 byte overread in 3497 mbedtls_asn1_get_int(). Found and fixed by Guido Vranken. #599 3498 * Fixed pthread implementation to avoid unintended double initialisations 3499 and double frees. Found by Niklas Amnebratt. 3500 * Fixed the sample applications gen_key.c, cert_req.c and cert_write.c for 3501 builds where the configuration MBEDTLS_PEM_WRITE_C is not defined. Found 3502 by inestlerode. #559. 3503 * Fix mbedtls_x509_get_sig() to update the ASN1 type in the mbedtls_x509_buf 3504 data structure until after error checks are successful. Found by 3505 subramanyam-c. #622 3506 * Fix documentation and implementation missmatch for function arguments of 3507 mbedtls_gcm_finish(). Found by cmiatpaar. #602 3508 * Guarantee that P>Q at RSA key generation. Found by inestlerode. #558 3509 * Fix potential byte overread when verifying malformed SERVER_HELLO in 3510 ssl_parse_hello_verify_request() for DTLS. Found by Guido Vranken. 3511 * Fix check for validity of date when parsing in mbedtls_x509_get_time(). 3512 Found by subramanyam-c. #626 3513 * Fix compatibility issue with Internet Explorer client authentication, 3514 where the limited hash choices prevented the client from sending its 3515 certificate. Found by teumas. #513 3516 * Fix compilation without MBEDTLS_SELF_TEST enabled. 3517 3518Changes 3519 * Extended test coverage of special cases, and added new timing test suite. 3520 * Removed self-tests from the basic-built-test.sh script, and added all 3521 missing self-tests to the test suites, to ensure self-tests are only 3522 executed once. 3523 * Added support for 3 and 4 byte lengths to mbedtls_asn1_write_len(). 3524 * Added support for a Yotta specific configuration file - 3525 through the symbol YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE. 3526 * Added optimization for code space for X.509/OID based on configured 3527 features. Contributed by Aviv Palivoda. 3528 * Renamed source file library/net.c to library/net_sockets.c to avoid 3529 naming collision in projects which also have files with the common name 3530 net.c. For consistency, the corresponding header file, net.h, is marked as 3531 deprecated, and its contents moved to net_sockets.h. 3532 * Changed the strategy for X.509 certificate parsing and validation, to no 3533 longer disregard certificates with unrecognised fields. 3534 3535= mbed TLS 2.3.0 branch released 2016-06-28 3536 3537Security 3538 * Fix missing padding length check in mbedtls_rsa_rsaes_pkcs1_v15_decrypt 3539 required by PKCS1 v2.2 3540 * Fix potential integer overflow to buffer overflow in 3541 mbedtls_rsa_rsaes_pkcs1_v15_encrypt and mbedtls_rsa_rsaes_oaep_encrypt 3542 (not triggerable remotely in (D)TLS). 3543 * Fix a potential integer underflow to buffer overread in 3544 mbedtls_rsa_rsaes_oaep_decrypt. It is not triggerable remotely in 3545 SSL/TLS. 3546 3547Features 3548 * Support for platform abstraction of the standard C library time() 3549 function. 3550 3551Bugfix 3552 * Fix bug in mbedtls_mpi_add_mpi() that caused wrong results when the three 3553 arguments where the same (in-place doubling). Found and fixed by Janos 3554 Follath. #309 3555 * Fix potential build failures related to the 'apidoc' target, introduced 3556 in the previous patch release. Found by Robert Scheck. #390 #391 3557 * Fix issue in Makefile that prevented building using armar. #386 3558 * Fix memory leak that occurred only when ECJPAKE was enabled and ECDHE and 3559 ECDSA was disabled in config.h . The leak didn't occur by default. 3560 * Fix an issue that caused valid certificates to be rejected whenever an 3561 expired or not yet valid certificate was parsed before a valid certificate 3562 in the trusted certificate list. 3563 * Fix bug in mbedtls_x509_crt_parse that caused trailing extra data in the 3564 buffer after DER certificates to be included in the raw representation. 3565 * Fix issue that caused a hang when generating RSA keys of odd bitlength 3566 * Fix bug in mbedtls_rsa_rsaes_pkcs1_v15_encrypt that made null pointer 3567 dereference possible. 3568 * Fix issue that caused a crash if invalid curves were passed to 3569 mbedtls_ssl_conf_curves. #373 3570 * Fix issue in ssl_fork_server which was preventing it from functioning. #429 3571 * Fix memory leaks in test framework 3572 * Fix test in ssl-opt.sh that does not run properly with valgrind 3573 * Fix unchecked calls to mmbedtls_md_setup(). Fix by Brian Murray. #502 3574 3575Changes 3576 * On ARM platforms, when compiling with -O0 with GCC, Clang or armcc5, 3577 don't use the optimized assembly for bignum multiplication. This removes 3578 the need to pass -fomit-frame-pointer to avoid a build error with -O0. 3579 * Disabled SSLv3 in the default configuration. 3580 * Optimized mbedtls_mpi_zeroize() for MPI integer size. (Fix by Alexey 3581 Skalozub). 3582 * Fix non-compliance server extension handling. Extensions for SSLv3 are now 3583 ignored, as required by RFC6101. 3584 3585= mbed TLS 2.2.1 released 2016-01-05 3586 3587Security 3588 * Fix potential double free when mbedtls_asn1_store_named_data() fails to 3589 allocate memory. Only used for certificate generation, not triggerable 3590 remotely in SSL/TLS. Found by Rafał Przywara. #367 3591 * Disable MD5 handshake signatures in TLS 1.2 by default to prevent the 3592 SLOTH attack on TLS 1.2 server authentication (other attacks from the 3593 SLOTH paper do not apply to any version of mbed TLS or PolarSSL). 3594 https://www.mitls.org/pages/attacks/SLOTH 3595 3596Bugfix 3597 * Fix over-restrictive length limit in GCM. Found by Andreas-N. #362 3598 * Fix bug in certificate validation that caused valid chains to be rejected 3599 when the first intermediate certificate has pathLenConstraint=0. Found by 3600 Nicholas Wilson. Introduced in mbed TLS 2.2.0. #280 3601 * Removed potential leak in mbedtls_rsa_rsassa_pkcs1_v15_sign(), found by 3602 JayaraghavendranK. #372 3603 * Fix suboptimal handling of unexpected records that caused interop issues 3604 with some peers over unreliable links. Avoid dropping an entire DTLS 3605 datagram if a single record in a datagram is unexpected, instead only 3606 drop the record and look at subsequent records (if any are present) in 3607 the same datagram. Found by jeannotlapin. #345 3608 3609= mbed TLS 2.2.0 released 2015-11-04 3610 3611Security 3612 * Fix potential double free if mbedtls_ssl_conf_psk() is called more than 3613 once and some allocation fails. Cannot be forced remotely. Found by Guido 3614 Vranken, Intelworks. 3615 * Fix potential heap corruption on Windows when 3616 mbedtls_x509_crt_parse_path() is passed a path longer than 2GB. Cannot be 3617 triggered remotely. Found by Guido Vranken, Intelworks. 3618 * Fix potential buffer overflow in some asn1_write_xxx() functions. 3619 Cannot be triggered remotely unless you create X.509 certificates based 3620 on untrusted input or write keys of untrusted origin. Found by Guido 3621 Vranken, Intelworks. 3622 * The X509 max_pathlen constraint was not enforced on intermediate 3623 certificates. Found by Nicholas Wilson, fix and tests provided by 3624 Janos Follath. #280 and #319 3625 3626Features 3627 * Experimental support for EC J-PAKE as defined in Thread 1.0.0. 3628 Disabled by default as the specification might still change. 3629 * Added a key extraction callback to accees the master secret and key 3630 block. (Potential uses include EAP-TLS and Thread.) 3631 3632Bugfix 3633 * Self-signed certificates were not excluded from pathlen counting, 3634 resulting in some valid X.509 being incorrectly rejected. Found and fix 3635 provided by Janos Follath. #319 3636 * Fix build error with configurations where ECDHE-PSK is the only key 3637 exchange. Found and fix provided by Chris Hammond. #270 3638 * Fix build error with configurations where RSA, RSA-PSK, ECDH-RSA or 3639 ECHD-ECDSA if the only key exchange. Multiple reports. #310 3640 * Fixed a bug causing some handshakes to fail due to some non-fatal alerts 3641 not being properly ignored. Found by mancha and Kasom Koht-arsa, #308 3642 * mbedtls_x509_crt_verify(_with_profile)() now also checks the key type and 3643 size/curve against the profile. Before that, there was no way to set a 3644 minimum key size for end-entity certificates with RSA keys. Found by 3645 Matthew Page of Scannex Electronics Ltd. 3646 * Fix failures in MPI on Sparc(64) due to use of bad assembly code. 3647 Found by Kurt Danielson. #292 3648 * Fix typo in name of the extKeyUsage OID. Found by inestlerode, #314 3649 * Fix bug in ASN.1 encoding of booleans that caused generated CA 3650 certificates to be rejected by some applications, including OS X 3651 Keychain. Found and fixed by Jonathan Leroy, Inikup. 3652 3653Changes 3654 * Improved performance of mbedtls_ecp_muladd() when one of the scalars is 1 3655 or -1. 3656 3657= mbed TLS 2.1.2 released 2015-10-06 3658 3659Security 3660 * Added fix for CVE-2015-5291 to prevent heap corruption due to buffer 3661 overflow of the hostname or session ticket. Found by Guido Vranken, 3662 Intelworks. 3663 * Fix potential double-free if mbedtls_ssl_set_hs_psk() is called more than 3664 once in the same handhake and mbedtls_ssl_conf_psk() was used. 3665 Found and patch provided by Guido Vranken, Intelworks. Cannot be forced 3666 remotely. 3667 * Fix stack buffer overflow in pkcs12 decryption (used by 3668 mbedtls_pk_parse_key(file)() when the password is > 129 bytes. 3669 Found by Guido Vranken, Intelworks. Not triggerable remotely. 3670 * Fix potential buffer overflow in mbedtls_mpi_read_string(). 3671 Found by Guido Vranken, Intelworks. Not exploitable remotely in the context 3672 of TLS, but might be in other uses. On 32 bit machines, requires reading a 3673 string of close to or larger than 1GB to exploit; on 64 bit machines, would 3674 require reading a string of close to or larger than 2^62 bytes. 3675 * Fix potential random memory allocation in mbedtls_pem_read_buffer() 3676 on crafted PEM input data. Found and fix provided by Guido Vranken, 3677 Intelworks. Not triggerable remotely in TLS. Triggerable remotely if you 3678 accept PEM data from an untrusted source. 3679 * Fix possible heap buffer overflow in base64_encoded() when the input 3680 buffer is 512MB or larger on 32-bit platforms. Found by Guido Vranken, 3681 Intelworks. Not trigerrable remotely in TLS. 3682 * Fix potential double-free if mbedtls_conf_psk() is called repeatedly on 3683 the same mbedtls_ssl_config object and memory allocation fails. Found by 3684 Guido Vranken, Intelworks. Cannot be forced remotely. 3685 * Fix potential heap buffer overflow in servers that perform client 3686 authentication against a crafted CA cert. Cannot be triggered remotely 3687 unless you allow third parties to pick trust CAs for client auth. 3688 Found by Guido Vranken, Intelworks. 3689 3690Bugfix 3691 * Fix compile error in net.c with musl libc. Found and patch provided by 3692 zhasha (#278). 3693 * Fix macroization of 'inline' keyword when building as C++. (#279) 3694 3695Changes 3696 * Added checking of hostname length in mbedtls_ssl_set_hostname() to ensure 3697 domain names are compliant with RFC 1035. 3698 * Fixed paths for check_config.h in example config files. (Found by bachp) 3699 (#291) 3700 3701= mbed TLS 2.1.1 released 2015-09-17 3702 3703Security 3704 * Add countermeasure against Lenstra's RSA-CRT attack for PKCS#1 v1.5 3705 signatures. (Found by Florian Weimer, Red Hat.) 3706 https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ 3707 * Fix possible client-side NULL pointer dereference (read) when the client 3708 tries to continue the handshake after it failed (a misuse of the API). 3709 (Found and patch provided by Fabian Foerg, Gotham Digital Science using 3710 afl-fuzz.) 3711 3712Bugfix 3713 * Fix warning when using a 64bit platform. (found by embedthis) (#275) 3714 * Fix off-by-one error in parsing Supported Point Format extension that 3715 caused some handshakes to fail. 3716 3717Changes 3718 * Made X509 profile pointer const in mbedtls_ssl_conf_cert_profile() to allow 3719 use of mbedtls_x509_crt_profile_next. (found by NWilson) 3720 * When a client initiates a reconnect from the same port as a live 3721 connection, if cookie verification is available 3722 (MBEDTLS_SSL_DTLS_HELLO_VERIFY defined in config.h, and usable cookie 3723 callbacks set with mbedtls_ssl_conf_dtls_cookies()), this will be 3724 detected and mbedtls_ssl_read() will return 3725 MBEDTLS_ERR_SSL_CLIENT_RECONNECT - it is then possible to start a new 3726 handshake with the same context. (See RFC 6347 section 4.2.8.) 3727 3728= mbed TLS 2.1.0 released 2015-09-04 3729 3730Features 3731 * Added support for yotta as a build system. 3732 * Primary open source license changed to Apache 2.0 license. 3733 3734Bugfix 3735 * Fix segfault in the benchmark program when benchmarking DHM. 3736 * Fix build error with CMake and pre-4.5 versions of GCC (found by Hugo 3737 Leisink). 3738 * Fix bug when parsing a ServerHello without extensions (found by David 3739 Sears). 3740 * Fix bug in CMake lists that caused libmbedcrypto.a not to be installed 3741 (found by Benoit Lecocq). 3742 * Fix bug in Makefile that caused libmbedcrypto and libmbedx509 not to be 3743 installed (found by Rawi666). 3744 * Fix compile error with armcc 5 with --gnu option. 3745 * Fix bug in Makefile that caused programs not to be installed correctly 3746 (found by robotanarchy) (#232). 3747 * Fix bug in Makefile that prevented from installing without building the 3748 tests (found by robotanarchy) (#232). 3749 * Fix missing -static-libgcc when building shared libraries for Windows 3750 with make. 3751 * Fix link error when building shared libraries for Windows with make. 3752 * Fix error when loading libmbedtls.so. 3753 * Fix bug in mbedtls_ssl_conf_default() that caused the default preset to 3754 be always used (found by dcb314) (#235) 3755 * Fix bug in mbedtls_rsa_public() and mbedtls_rsa_private() that could 3756 result trying to unlock an unlocked mutex on invalid input (found by 3757 Fredrik Axelsson) (#257) 3758 * Fix -Wshadow warnings (found by hnrkp) (#240) 3759 * Fix memory corruption on client with overlong PSK identity, around 3760 SSL_MAX_CONTENT_LEN or higher - not triggerrable remotely (found by 3761 Aleksandrs Saveljevs) (#238) 3762 * Fix unused function warning when using MBEDTLS_MDx_ALT or 3763 MBEDTLS_SHAxxx_ALT (found by Henrik) (#239) 3764 * Fix memory corruption in pkey programs (found by yankuncheng) (#210) 3765 3766Changes 3767 * The PEM parser now accepts a trailing space at end of lines (#226). 3768 * It is now possible to #include a user-provided configuration file at the 3769 end of the default config.h by defining MBEDTLS_USER_CONFIG_FILE on the 3770 compiler's command line. 3771 * When verifying a certificate chain, if an intermediate certificate is 3772 trusted, no later cert is checked. (suggested by hannes-landeholm) 3773 (#220). 3774 * Prepend a "thread identifier" to debug messages (issue pointed out by 3775 Hugo Leisink) (#210). 3776 * Add mbedtls_ssl_get_max_frag_len() to query the current maximum fragment 3777 length. 3778 3779= mbed TLS 2.0.0 released 2015-07-13 3780 3781Features 3782 * Support for DTLS 1.0 and 1.2 (RFC 6347). 3783 * Ability to override core functions from MDx, SHAx, AES and DES modules 3784 with custom implementation (eg hardware accelerated), complementing the 3785 ability to override the whole module. 3786 * New server-side implementation of session tickets that rotate keys to 3787 preserve forward secrecy, and allows sharing across multiple contexts. 3788 * Added a concept of X.509 cerificate verification profile that controls 3789 which algorithms and key sizes (curves for ECDSA) are acceptable. 3790 * Expanded configurability of security parameters in the SSL module with 3791 mbedtls_ssl_conf_dhm_min_bitlen() and mbedtls_ssl_conf_sig_hashes(). 3792 * Introduced a concept of presets for SSL security-relevant configuration 3793 parameters. 3794 3795API Changes 3796 * The library has been split into libmbedcrypto, libmbedx509, libmbedtls. 3797 You now need to link to all of them if you use TLS for example. 3798 * All public identifiers moved to the mbedtls_* or MBEDTLS_* namespace. 3799 Some names have been further changed to make them more consistent. 3800 Migration helpers scripts/rename.pl and include/mbedtls/compat-1.3.h are 3801 provided. Full list of renamings in scripts/data_files/rename-1.3-2.0.txt 3802 * Renamings of fields inside structures, not covered by the previous list: 3803 mbedtls_cipher_info_t.key_length -> key_bitlen 3804 mbedtls_cipher_context_t.key_length -> key_bitlen 3805 mbedtls_ecp_curve_info.size -> bit_size 3806 * Headers are now found in the 'mbedtls' directory (previously 'polarssl'). 3807 * The following _init() functions that could return errors have 3808 been split into an _init() that returns void and another function that 3809 should generally be the first function called on this context after init: 3810 mbedtls_ssl_init() -> mbedtls_ssl_setup() 3811 mbedtls_ccm_init() -> mbedtls_ccm_setkey() 3812 mbedtls_gcm_init() -> mbedtls_gcm_setkey() 3813 mbedtls_hmac_drbg_init() -> mbedtls_hmac_drbg_seed(_buf)() 3814 mbedtls_ctr_drbg_init() -> mbedtls_ctr_drbg_seed() 3815 Note that for mbedtls_ssl_setup(), you need to be done setting up the 3816 ssl_config structure before calling it. 3817 * Most ssl_set_xxx() functions (all except ssl_set_bio(), ssl_set_hostname(), 3818 ssl_set_session() and ssl_set_client_transport_id(), plus 3819 ssl_legacy_renegotiation()) have been renamed to mbedtls_ssl_conf_xxx() 3820 (see rename.pl and compat-1.3.h above) and their first argument's type 3821 changed from ssl_context to ssl_config. 3822 * ssl_set_bio() changed signature (contexts merged, order switched, one 3823 additional callback for read-with-timeout). 3824 * The following functions have been introduced and must be used in callback 3825 implementations (SNI, PSK) instead of their *conf counterparts: 3826 mbedtls_ssl_set_hs_own_cert() 3827 mbedtls_ssl_set_hs_ca_chain() 3828 mbedtls_ssl_set_hs_psk() 3829 * mbedtls_ssl_conf_ca_chain() lost its last argument (peer_cn), now set 3830 using mbedtls_ssl_set_hostname(). 3831 * mbedtls_ssl_conf_session_cache() changed prototype (only one context 3832 pointer, parameters reordered). 3833 * On server, mbedtls_ssl_conf_session_tickets_cb() must now be used in 3834 place of mbedtls_ssl_conf_session_tickets() to enable session tickets. 3835 * The SSL debug callback gained two new arguments (file name, line number). 3836 * Debug modes were removed. 3837 * mbedtls_ssl_conf_truncated_hmac() now returns void. 3838 * mbedtls_memory_buffer_alloc_init() now returns void. 3839 * X.509 verification flags are now an uint32_t. Affect the signature of: 3840 mbedtls_ssl_get_verify_result() 3841 mbedtls_x509_ctr_verify_info() 3842 mbedtls_x509_crt_verify() (flags, f_vrfy -> needs to be updated) 3843 mbedtls_ssl_conf_verify() (f_vrfy -> needs to be updated) 3844 * The following functions changed prototype to avoid an in-out length 3845 parameter: 3846 mbedtls_base64_encode() 3847 mbedtls_base64_decode() 3848 mbedtls_mpi_write_string() 3849 mbedtls_dhm_calc_secret() 3850 * In the NET module, all "int" and "int *" arguments for file descriptors 3851 changed type to "mbedtls_net_context *". 3852 * net_accept() gained new arguments for the size of the client_ip buffer. 3853 * In the threading layer, mbedtls_mutex_init() and mbedtls_mutex_free() now 3854 return void. 3855 * ecdsa_write_signature() gained an additional md_alg argument and 3856 ecdsa_write_signature_det() was deprecated. 3857 * pk_sign() no longer accepts md_alg == POLARSSL_MD_NONE with ECDSA. 3858 * Last argument of x509_crt_check_key_usage() and 3859 mbedtls_x509write_crt_set_key_usage() changed from int to unsigned. 3860 * test_ca_list (from certs.h) is renamed to test_cas_pem and is only 3861 available if POLARSSL_PEM_PARSE_C is defined (it never worked without). 3862 * Test certificates in certs.c are no longer guaranteed to be nul-terminated 3863 strings; use the new *_len variables instead of strlen(). 3864 * Functions mbedtls_x509_xxx_parse(), mbedtls_pk_parse_key(), 3865 mbedtls_pk_parse_public_key() and mbedtls_dhm_parse_dhm() now expect the 3866 length parameter to include the terminating null byte for PEM input. 3867 * Signature of mpi_mul_mpi() changed to make the last argument unsigned 3868 * calloc() is now used instead of malloc() everywhere. API of platform 3869 layer and the memory_buffer_alloc module changed accordingly. 3870 (Thanks to Mansour Moufid for helping with the replacement.) 3871 * Change SSL_DISABLE_RENEGOTIATION config.h flag to SSL_RENEGOTIATION 3872 (support for renegotiation now needs explicit enabling in config.h). 3873 * Split MBEDTLS_HAVE_TIME into MBEDTLS_HAVE_TIME and MBEDTLS_HAVE_TIME_DATE 3874 in config.h 3875 * net_connect() and net_bind() have a new 'proto' argument to choose 3876 between TCP and UDP, using the macros NET_PROTO_TCP or NET_PROTO_UDP. 3877 Their 'port' argument type is changed to a string. 3878 * Some constness fixes 3879 3880Removals 3881 * Removed mbedtls_ecp_group_read_string(). Only named groups are supported. 3882 * Removed mbedtls_ecp_sub() and mbedtls_ecp_add(), use 3883 mbedtls_ecp_muladd(). 3884 * Removed individual mdX_hmac, shaX_hmac, mdX_file and shaX_file functions 3885 (use generic functions from md.h) 3886 * Removed mbedtls_timing_msleep(). Use mbedtls_net_usleep() or a custom 3887 waiting function. 3888 * Removed test DHM parameters from the test certs module. 3889 * Removed the PBKDF2 module (use PKCS5). 3890 * Removed POLARSSL_ERROR_STRERROR_BC (use mbedtls_strerror()). 3891 * Removed compat-1.2.h (helper for migrating from 1.2 to 1.3). 3892 * Removed openssl.h (very partial OpenSSL compatibility layer). 3893 * Configuration options POLARSSL_HAVE_LONGLONG was removed (now always on). 3894 * Configuration options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 have 3895 been removed (compiler is required to support 32-bit operations). 3896 * Configuration option POLARSSL_HAVE_IPV6 was removed (always enabled). 3897 * Removed test program o_p_test, the script compat.sh does more. 3898 * Removed test program ssl_test, superseded by ssl-opt.sh. 3899 * Removed helper script active-config.pl 3900 3901New deprecations 3902 * md_init_ctx() is deprecated in favour of md_setup(), that adds a third 3903 argument (allowing memory savings if HMAC is not used) 3904 3905Semi-API changes (technically public, morally private) 3906 * Renamed a few headers to include _internal in the name. Those headers are 3907 not supposed to be included by users. 3908 * Changed md_info_t into an opaque structure (use md_get_xxx() accessors). 3909 * Changed pk_info_t into an opaque structure. 3910 * Changed cipher_base_t into an opaque structure. 3911 * Removed sig_oid2 and rename sig_oid1 to sig_oid in x509_crt and x509_crl. 3912 * x509_crt.key_usage changed from unsigned char to unsigned int. 3913 * Removed r and s from ecdsa_context 3914 * Removed mode from des_context and des3_context 3915 3916Default behavior changes 3917 * The default minimum TLS version is now TLS 1.0. 3918 * RC4 is now blacklisted by default in the SSL/TLS layer, and excluded from the 3919 default ciphersuite list returned by ssl_list_ciphersuites() 3920 * Support for receiving SSLv2 ClientHello is now disabled by default at 3921 compile time. 3922 * The default authmode for SSL/TLS clients is now REQUIRED. 3923 * Support for RSA_ALT contexts in the PK layer is now optional. Since is is 3924 enabled in the default configuration, this is only noticeable if using a 3925 custom config.h 3926 * Default DHM parameters server-side upgraded from 1024 to 2048 bits. 3927 * A minimum RSA key size of 2048 bits is now enforced during ceritificate 3928 chain verification. 3929 * Negotiation of truncated HMAC is now disabled by default on server too. 3930 * The following functions are now case-sensitive: 3931 mbedtls_cipher_info_from_string() 3932 mbedtls_ecp_curve_info_from_name() 3933 mbedtls_md_info_from_string() 3934 mbedtls_ssl_ciphersuite_from_string() 3935 mbedtls_version_check_feature() 3936 3937Requirement changes 3938 * The minimum MSVC version required is now 2010 (better C99 support). 3939 * The NET layer now unconditionnaly relies on getaddrinfo() and select(). 3940 * Compiler is required to support C99 types such as long long and uint32_t. 3941 3942API changes from the 1.4 preview branch 3943 * ssl_set_bio_timeout() was removed, split into mbedtls_ssl_set_bio() with 3944 new prototype, and mbedtls_ssl_set_read_timeout(). 3945 * The following functions now return void: 3946 mbedtls_ssl_conf_transport() 3947 mbedtls_ssl_conf_max_version() 3948 mbedtls_ssl_conf_min_version() 3949 * DTLS no longer hard-depends on TIMING_C, but uses a callback interface 3950 instead, see mbedtls_ssl_set_timer_cb(), with the Timing module providing 3951 an example implementation, see mbedtls_timing_delay_context and 3952 mbedtls_timing_set/get_delay(). 3953 * With UDP sockets, it is no longer necessary to call net_bind() again 3954 after a successful net_accept(). 3955 3956Changes 3957 * mbedtls_ctr_drbg_random() and mbedtls_hmac_drbg_random() are now 3958 thread-safe if MBEDTLS_THREADING_C is enabled. 3959 * Reduced ROM fooprint of SHA-256 and added an option to reduce it even 3960 more (at the expense of performance) MBEDTLS_SHA256_SMALLER. 3961 3962= mbed TLS 1.3 branch 3963 3964Security 3965 * With authmode set to SSL_VERIFY_OPTIONAL, verification of keyUsage and 3966 extendedKeyUsage on the leaf certificate was lost (results not accessible 3967 via ssl_get_verify_results()). 3968 * Add countermeasure against "Lucky 13 strikes back" cache-based attack, 3969 https://dl.acm.org/citation.cfm?id=2714625 3970 3971Features 3972 * Improve ECC performance by using more efficient doubling formulas 3973 (contributed by Peter Dettman). 3974 * Add x509_crt_verify_info() to display certificate verification results. 3975 * Add support for reading DH parameters with privateValueLength included 3976 (contributed by Daniel Kahn Gillmor). 3977 * Add support for bit strings in X.509 names (request by Fredrik Axelsson). 3978 * Add support for id-at-uniqueIdentifier in X.509 names. 3979 * Add support for overriding snprintf() (except on Windows) and exit() in 3980 the platform layer. 3981 * Add an option to use macros instead of function pointers in the platform 3982 layer (helps get rid of unwanted references). 3983 * Improved Makefiles for Windows targets by fixing library targets and making 3984 cross-compilation easier (thanks to Alon Bar-Lev). 3985 * The benchmark program also prints heap usage for public-key primitives 3986 if POLARSSL_MEMORY_BUFFER_ALLOC_C and POLARSSL_MEMORY_DEBUG are defined. 3987 * New script ecc-heap.sh helps measuring the impact of ECC parameters on 3988 speed and RAM (heap only for now) usage. 3989 * New script memory.sh helps measuring the ROM and RAM requirements of two 3990 reduced configurations (PSK-CCM and NSA suite B). 3991 * Add config flag POLARSSL_DEPRECATED_WARNING (off by default) to produce 3992 warnings on use of deprecated functions (with GCC and Clang only). 3993 * Add config flag POLARSSL_DEPRECATED_REMOVED (off by default) to produce 3994 errors on use of deprecated functions. 3995 3996Bugfix 3997 * Fix compile errors with PLATFORM_NO_STD_FUNCTIONS. 3998 * Fix compile error with PLATFORM_EXIT_ALT (thanks to Rafał Przywara). 3999 * Fix bug in entropy.c when THREADING_C is also enabled that caused 4000 entropy_free() to crash (thanks to Rafał Przywara). 4001 * Fix memory leak when gcm_setkey() and ccm_setkey() are used more than 4002 once on the same context. 4003 * Fix bug in ssl_mail_client when password is longer that username (found 4004 by Bruno Pape). 4005 * Fix undefined behaviour (memcmp( NULL, NULL, 0 );) in X.509 modules 4006 (detected by Clang's 3.6 UBSan). 4007 * mpi_size() and mpi_msb() would segfault when called on an mpi that is 4008 initialized but not set (found by pravic). 4009 * Fix detection of support for getrandom() on Linux (reported by syzzer) by 4010 doing it at runtime (using uname) rather that compile time. 4011 * Fix handling of symlinks by "make install" (found by Gaël PORTAY). 4012 * Fix potential NULL pointer dereference (not trigerrable remotely) when 4013 ssl_write() is called before the handshake is finished (introduced in 4014 1.3.10) (first reported by Martin Blumenstingl). 4015 * Fix bug in pk_parse_key() that caused some valid private EC keys to be 4016 rejected. 4017 * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos). 4018 * Fix thread safety bug in RSA operations (found by Fredrik Axelsson). 4019 * Fix hardclock() (only used in the benchmarking program) with some 4020 versions of mingw64 (found by kxjhlele). 4021 * Fix warnings from mingw64 in timing.c (found by kxjklele). 4022 * Fix potential unintended sign extension in asn1_get_len() on 64-bit 4023 platforms. 4024 * Fix potential memory leak in ssl_set_psk() (found by Mansour Moufid). 4025 * Fix compile error when POLARSSL_SSL_DISABLE_RENEGOTATION and 4026 POLARSSL_SSL_SSESSION_TICKETS where both enabled in config.h (introduced 4027 in 1.3.10). 4028 * Add missing extern "C" guard in aesni.h (reported by amir zamani). 4029 * Add missing dependency on SHA-256 in some x509 programs (reported by 4030 Gergely Budai). 4031 * Fix bug related to ssl_set_curves(): the client didn't check that the 4032 curve picked by the server was actually allowed. 4033 4034Changes 4035 * Remove bias in mpi_gen_prime (contributed by Pascal Junod). 4036 * Remove potential sources of timing variations (some contributed by Pascal 4037 Junod). 4038 * Options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 are deprecated. 4039 * Enabling POLARSSL_NET_C without POLARSSL_HAVE_IPV6 is deprecated. 4040 * compat-1.2.h and openssl.h are deprecated. 4041 * Adjusting/overriding CFLAGS and LDFLAGS with the make build system is now 4042 more flexible (warning: OFLAGS is not used any more) (see the README) 4043 (contributed by Alon Bar-Lev). 4044 * ssl_set_own_cert() no longer calls pk_check_pair() since the 4045 performance impact was bad for some users (this was introduced in 1.3.10). 4046 * Move from SHA-1 to SHA-256 in example programs using signatures 4047 (suggested by Thorsten Mühlfelder). 4048 * Remove some unneeded inclusions of header files from the standard library 4049 "minimize" others (eg use stddef.h if only size_t is needed). 4050 * Change #include lines in test files to use double quotes instead of angle 4051 brackets for uniformity with the rest of the code. 4052 * Remove dependency on sscanf() in X.509 parsing modules. 4053 4054= mbed TLS 1.3.10 released 2015-02-09 4055Security 4056 * NULL pointer dereference in the buffer-based allocator when the buffer is 4057 full and polarssl_free() is called (found by Mark Hasemeyer) 4058 (only possible if POLARSSL_MEMORY_BUFFER_ALLOC_C is enabled, which it is 4059 not by default). 4060 * Fix remotely-triggerable uninitialised pointer dereference caused by 4061 crafted X.509 certificate (TLS server is not affected if it doesn't ask for a 4062 client certificate) (found using Codenomicon Defensics). 4063 * Fix remotely-triggerable memory leak caused by crafted X.509 certificates 4064 (TLS server is not affected if it doesn't ask for a client certificate) 4065 (found using Codenomicon Defensics). 4066 * Fix potential stack overflow while parsing crafted X.509 certificates 4067 (TLS server is not affected if it doesn't ask for a client certificate) 4068 (found using Codenomicon Defensics). 4069 * Fix timing difference that could theoretically lead to a 4070 Bleichenbacher-style attack in the RSA and RSA-PSK key exchanges 4071 (reported by Sebastian Schinzel). 4072 4073Features 4074 * Add support for FALLBACK_SCSV (draft-ietf-tls-downgrade-scsv). 4075 * Add support for Extended Master Secret (draft-ietf-tls-session-hash). 4076 * Add support for Encrypt-then-MAC (RFC 7366). 4077 * Add function pk_check_pair() to test if public and private keys match. 4078 * Add x509_crl_parse_der(). 4079 * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the 4080 length of an X.509 verification chain. 4081 * Support for renegotiation can now be disabled at compile-time 4082 * Support for 1/n-1 record splitting, a countermeasure against BEAST. 4083 * Certificate selection based on signature hash, preferring SHA-1 over SHA-2 4084 for pre-1.2 clients when multiple certificates are available. 4085 * Add support for getrandom() syscall on recent Linux kernels with Glibc or 4086 a compatible enough libc (eg uClibc). 4087 * Add ssl_set_arc4_support() to make it easier to disable RC4 at runtime 4088 while using the default ciphersuite list. 4089 * Added new error codes and debug messages about selection of 4090 ciphersuite/certificate. 4091 4092Bugfix 4093 * Stack buffer overflow if ctr_drbg_update() is called with too large 4094 add_len (found by Jean-Philippe Aumasson) (not triggerable remotely). 4095 * Possible buffer overflow of length at most POLARSSL_MEMORY_ALIGN_MULTIPLE 4096 if memory_buffer_alloc_init() was called with buf not aligned and len not 4097 a multiple of POLARSSL_MEMORY_ALIGN_MULTIPLE (not triggerable remotely). 4098 * User set CFLAGS were ignored by Cmake with gcc (introduced in 1.3.9, found 4099 by Julian Ospald). 4100 * Fix potential undefined behaviour in Camellia. 4101 * Fix potential failure in ECDSA signatures when POLARSSL_ECP_MAX_BITS is a 4102 multiple of 8 (found by Gergely Budai). 4103 * Fix unchecked return code in x509_crt_parse_path() on Windows (found by 4104 Peter Vaskovic). 4105 * Fix assembly selection for MIPS64 (thanks to James Cowgill). 4106 * ssl_get_verify_result() now works even if the handshake was aborted due 4107 to a failed verification (found by Fredrik Axelsson). 4108 * Skip writing and parsing signature_algorithm extension if none of the 4109 key exchanges enabled needs certificates. This fixes a possible interop 4110 issue with some servers when a zero-length extension was sent. (Reported 4111 by Peter Dettman.) 4112 * On a 0-length input, base64_encode() did not correctly set output length 4113 (found by Hendrik van den Boogaard). 4114 4115Changes 4116 * Use deterministic nonces for AEAD ciphers in TLS by default (possible to 4117 switch back to random with POLARSSL_SSL_AEAD_RANDOM_IV in config.h). 4118 * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined. 4119 * ssl_set_own_cert() now returns an error on key-certificate mismatch. 4120 * Forbid repeated extensions in X.509 certificates. 4121 * debug_print_buf() now prints a text view in addition to hexadecimal. 4122 * A specific error is now returned when there are ciphersuites in common 4123 but none of them is usable due to external factors such as no certificate 4124 with a suitable (extended)KeyUsage or curve or no PSK set. 4125 * It is now possible to disable negotiation of truncated HMAC server-side 4126 at runtime with ssl_set_truncated_hmac(). 4127 * Example programs for SSL client and server now disable SSLv3 by default. 4128 * Example programs for SSL client and server now disable RC4 by default. 4129 * Use platform.h in all test suites and programs. 4130 4131= PolarSSL 1.3.9 released 2014-10-20 4132Security 4133 * Lowest common hash was selected from signature_algorithms extension in 4134 TLS 1.2 (found by Darren Bane) (introduced in 1.3.8). 4135 * Remotely-triggerable memory leak when parsing some X.509 certificates 4136 (server is not affected if it doesn't ask for a client certificate) 4137 (found using Codenomicon Defensics). 4138 * Remotely-triggerable memory leak when parsing crafted ClientHello 4139 (not affected if ECC support was compiled out) (found using Codenomicon 4140 Defensics). 4141 4142Bugfix 4143 * Support escaping of commas in x509_string_to_names() 4144 * Fix compile error in ssl_pthread_server (found by Julian Ospald). 4145 * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce). 4146 * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel). 4147 * Fix warnings from Clang's scan-build (contributed by Alfred Klomp). 4148 * Fix compile error in timing.c when POLARSSL_NET_C and POLARSSL_SELFTEST 4149 are defined but not POLARSSL_HAVE_TIME (found by Stephane Di Vito). 4150 * Remove non-existent file from VS projects (found by Peter Vaskovic). 4151 * ssl_read() could return non-application data records on server while 4152 renegotation was pending, and on client when a HelloRequest was received. 4153 * Server-initiated renegotiation would fail with non-blocking I/O if the 4154 write callback returned WANT_WRITE when requesting renegotiation. 4155 * ssl_close_notify() could send more than one message in some circumstances 4156 with non-blocking I/O. 4157 * Fix compiler warnings on iOS (found by Sander Niemeijer). 4158 * x509_crt_parse() did not increase total_failed on PEM error 4159 * Fix compile error with armcc in mpi_is_prime() 4160 * Fix potential bad read in parsing ServerHello (found by Adrien 4161 Vialletelle). 4162 4163Changes 4164 * Ciphersuites using SHA-256 or SHA-384 now require TLS 1.x (there is no 4165 standard defining how to use SHA-2 with SSL 3.0). 4166 * Ciphersuites using RSA-PSK key exchange new require TLS 1.x (the spec is 4167 ambiguous on how to encode some packets with SSL 3.0). 4168 * Made buffer size in pk_write_(pub)key_pem() more dynamic, eg smaller if 4169 RSA is disabled, larger if POLARSSL_MPI_MAX_SIZE is larger. 4170 * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than 4171 POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts. 4172 * POLARSSL_MPI_MAX_SIZE now defaults to 1024 in order to allow 8192 bits 4173 RSA keys. 4174 * Accept spaces at end of line or end of buffer in base64_decode(). 4175 * X.509 certificates with more than one AttributeTypeAndValue per 4176 RelativeDistinguishedName are not accepted any more. 4177 4178= PolarSSL 1.3.8 released 2014-07-11 4179Security 4180 * Fix length checking for AEAD ciphersuites (found by Codenomicon). 4181 It was possible to crash the server (and client) using crafted messages 4182 when a GCM suite was chosen. 4183 4184Features 4185 * Add CCM module and cipher mode to Cipher Layer 4186 * Support for CCM and CCM_8 ciphersuites 4187 * Support for parsing and verifying RSASSA-PSS signatures in the X.509 4188 modules (certificates, CRLs and CSRs). 4189 * Blowfish in the cipher layer now supports variable length keys. 4190 * Add example config.h for PSK with CCM, optimized for low RAM usage. 4191 * Optimize for RAM usage in example config.h for NSA Suite B profile. 4192 * Add POLARSSL_REMOVE_ARC4_CIPHERSUITES to allow removing RC4 ciphersuites 4193 from the default list (inactive by default). 4194 * Add server-side enforcement of sent renegotiation requests 4195 (ssl_set_renegotiation_enforced()) 4196 * Add SSL_CIPHERSUITES config.h flag to allow specifying a list of 4197 ciphersuites to use and save some memory if the list is small. 4198 4199Changes 4200 * Add LINK_WITH_PTHREAD option in CMake for explicit linking that is 4201 required on some platforms (e.g. OpenBSD) 4202 * Migrate zeroizing of data to polarssl_zeroize() instead of memset() 4203 against unwanted compiler optimizations 4204 * md_list() now returns hashes strongest first 4205 * Selection of hash for signing ServerKeyExchange in TLS 1.2 now picks 4206 strongest offered by client. 4207 * All public contexts have _init() and _free() functions now for simpler 4208 usage pattern 4209 4210Bugfix 4211 * Fix in debug_print_msg() 4212 * Enforce alignment in the buffer allocator even if buffer is not aligned 4213 * Remove less-than-zero checks on unsigned numbers 4214 * Stricter check on SSL ClientHello internal sizes compared to actual packet 4215 size (found by TrustInSoft) 4216 * Fix WSAStartup() return value check (found by Peter Vaskovic) 4217 * Other minor issues (found by Peter Vaskovic) 4218 * Fix symlink command for cross compiling with CMake (found by Andre 4219 Heinecke) 4220 * Fix DER output of gen_key app (found by Gergely Budai) 4221 * Very small records were incorrectly rejected when truncated HMAC was in 4222 use with some ciphersuites and versions (RC4 in all versions, CBC with 4223 versions < TLS 1.1). 4224 * Very large records using more than 224 bytes of padding were incorrectly 4225 rejected with CBC-based ciphersuites and TLS >= 1.1 4226 * Very large records using less padding could cause a buffer overread of up 4227 to 32 bytes with CBC-based ciphersuites and TLS >= 1.1 4228 * Restore ability to use a v1 cert as a CA if trusted locally. (This had 4229 been removed in 1.3.6.) 4230 * Restore ability to locally trust a self-signed cert that is not a proper 4231 CA for use as an end entity certificate. (This had been removed in 4232 1.3.6.) 4233 * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan). 4234 * Use \n\t rather than semicolons for bn_mul asm, since some assemblers 4235 interpret semicolons as comment delimiters (found by Barry K. Nathan). 4236 * Fix off-by-one error in parsing Supported Point Format extension that 4237 caused some handshakes to fail. 4238 * Fix possible miscomputation of the premaster secret with DHE-PSK key 4239 exchange that caused some handshakes to fail with other implementations. 4240 (Failure rate <= 1/255 with common DHM moduli.) 4241 * Disable broken Sparc64 bn_mul assembly (found by Florian Obser). 4242 * Fix base64_decode() to return and check length correctly (in case of 4243 tight buffers) 4244 * Fix mpi_write_string() to write "00" as hex output for empty MPI (found 4245 by Hui Dong) 4246 4247= PolarSSL 1.3.7 released on 2014-05-02 4248Features 4249 * debug_set_log_mode() added to determine raw or full logging 4250 * debug_set_threshold() added to ignore messages over threshold level 4251 * version_check_feature() added to check for compile-time options at 4252 run-time 4253 4254Changes 4255 * POLARSSL_CONFIG_OPTIONS has been removed. All values are individually 4256 checked and filled in the relevant module headers 4257 * Debug module only outputs full lines instead of parts 4258 * Better support for the different Attribute Types from IETF PKIX (RFC 5280) 4259 * AES-NI now compiles with "old" assemblers too 4260 * Ciphersuites based on RC4 now have the lowest priority by default 4261 4262Bugfix 4263 * Only iterate over actual certificates in ssl_write_certificate_request() 4264 (found by Matthew Page) 4265 * Typos in platform.c and pkcs11.c (found by Daniel Phillips and Steffan 4266 Karger) 4267 * cert_write app should use subject of issuer certificate as issuer of cert 4268 * Fix false reject in padding check in ssl_decrypt_buf() for CBC 4269 ciphersuites, for full SSL frames of data. 4270 * Improve interoperability by not writing extension length in ClientHello / 4271 ServerHello when no extensions are present (found by Matthew Page) 4272 * rsa_check_pubkey() now allows an E up to N 4273 * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings 4274 * mpi_fill_random() was creating numbers larger than requested on 4275 big-endian platform when size was not an integer number of limbs 4276 * Fix dependencies issues in X.509 test suite. 4277 * Some parts of ssl_tls.c were compiled even when the module was disabled. 4278 * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer) 4279 * Fix detection of Clang on some Apple platforms with CMake 4280 (found by Barry K. Nathan) 4281 4282= PolarSSL 1.3.6 released on 2014-04-11 4283 4284Features 4285 * Support for the ALPN SSL extension 4286 * Add option 'use_dev_random' to gen_key application 4287 * Enable verification of the keyUsage extension for CA and leaf 4288 certificates (POLARSSL_X509_CHECK_KEY_USAGE) 4289 * Enable verification of the extendedKeyUsage extension 4290 (POLARSSL_X509_CHECK_EXTENDED_KEY_USAGE) 4291 4292Changes 4293 * x509_crt_info() now prints information about parsed extensions as well 4294 * pk_verify() now returns a specific error code when the signature is valid 4295 but shorter than the supplied length. 4296 * Use UTC time to check certificate validity. 4297 * Reject certificates with times not in UTC, per RFC 5280. 4298 4299Security 4300 * Avoid potential timing leak in ecdsa_sign() by blinding modular division. 4301 (Found by Watson Ladd.) 4302 * The notAfter date of some certificates was no longer checked since 1.3.5. 4303 This affects certificates in the user-supplied chain except the top 4304 certificate. If the user-supplied chain contains only one certificates, 4305 it is not affected (ie, its notAfter date is properly checked). 4306 * Prevent potential NULL pointer dereference in ssl_read_record() (found by 4307 TrustInSoft) 4308 4309Bugfix 4310 * The length of various ClientKeyExchange messages was not properly checked. 4311 * Some example server programs were not sending the close_notify alert. 4312 * Potential memory leak in mpi_exp_mod() when error occurs during 4313 calculation of RR. 4314 * Fixed malloc/free default #define in platform.c (found by Gergely Budai). 4315 * Fixed type which made POLARSSL_ENTROPY_FORCE_SHA256 uneffective (found by 4316 Gergely Budai). 4317 * Fix #include path in ecdsa.h which wasn't accepted by some compilers. 4318 (found by Gergely Budai) 4319 * Fix compile errors when POLARSSL_ERROR_STRERROR_BC is undefined (found by 4320 Shuo Chen). 4321 * oid_get_numeric_string() used to truncate the output without returning an 4322 error if the output buffer was just 1 byte too small. 4323 * dhm_parse_dhm() (hence dhm_parse_dhmfile()) did not set dhm->len. 4324 * Calling pk_debug() on an RSA-alt key would segfault. 4325 * pk_get_size() and pk_get_len() were off by a factor 8 for RSA-alt keys. 4326 * Potential buffer overwrite in pem_write_buffer() because of low length 4327 indication (found by Thijs Alkemade) 4328 * EC curves constants, which should be only in ROM since 1.3.3, were also 4329 stored in RAM due to missing 'const's (found by Gergely Budai). 4330 4331= PolarSSL 1.3.5 released on 2014-03-26 4332Features 4333 * HMAC-DRBG as a separate module 4334 * Option to set the Curve preference order (disabled by default) 4335 * Single Platform compatilibity layer (for memory / printf / fprintf) 4336 * Ability to provide alternate timing implementation 4337 * Ability to force the entropy module to use SHA-256 as its basis 4338 (POLARSSL_ENTROPY_FORCE_SHA256) 4339 * Testing script ssl-opt.sh added for testing 'live' ssl option 4340 interoperability against OpenSSL and PolarSSL 4341 * Support for reading EC keys that use SpecifiedECDomain in some cases. 4342 * Entropy module now supports seed writing and reading 4343 4344Changes 4345 * Deprecated the Memory layer 4346 * entropy_add_source(), entropy_update_manual() and entropy_gather() 4347 now thread-safe if POLARSSL_THREADING_C defined 4348 * Improvements to the CMake build system, contributed by Julian Ospald. 4349 * Work around a bug of the version of Clang shipped by Apple with Mavericks 4350 that prevented bignum.c from compiling. (Reported by Rafael Baptista.) 4351 * Revamped the compat.sh interoperatibility script to include support for 4352 testing against GnuTLS 4353 * Deprecated ssl_set_own_cert_rsa() and ssl_set_own_cert_rsa_alt() 4354 * Improvements to tests/Makefile, contributed by Oden Eriksson. 4355 4356Security 4357 * Forbid change of server certificate during renegotiation to prevent 4358 "triple handshake" attack when authentication mode is 'optional' (the 4359 attack was already impossible when authentication is required). 4360 * Check notBefore timestamp of certificates and CRLs from the future. 4361 * Forbid sequence number wrapping 4362 * Fixed possible buffer overflow with overlong PSK 4363 * Possible remotely-triggered out-of-bounds memory access fixed (found by 4364 TrustInSoft) 4365 4366Bugfix 4367 * ecp_gen_keypair() does more tries to prevent failure because of 4368 statistics 4369 * Fixed bug in RSA PKCS#1 v1.5 "reversed" operations 4370 * Fixed testing with out-of-source builds using cmake 4371 * Fixed version-major intolerance in server 4372 * Fixed CMake symlinking on out-of-source builds 4373 * Fixed dependency issues in test suite 4374 * Programs rsa_sign_pss and rsa_verify_pss were not using PSS since 1.3.0 4375 * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by 4376 Alex Wilson.) 4377 * ssl_cache was creating entries when max_entries=0 if TIMING_C was enabled. 4378 * m_sleep() was sleeping twice too long on most Unix platforms. 4379 * Fixed bug with session tickets and non-blocking I/O in the unlikely case 4380 send() would return an EAGAIN error when sending the ticket. 4381 * ssl_cache was leaking memory when reusing a timed out entry containing a 4382 client certificate. 4383 * ssl_srv was leaking memory when client presented a timed out ticket 4384 containing a client certificate 4385 * ssl_init() was leaving a dirty pointer in ssl_context if malloc of 4386 out_ctr failed 4387 * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc 4388 of one of them failed 4389 * Fix typo in rsa_copy() that impacted PKCS#1 v2 contexts 4390 * x509_get_current_time() uses localtime_r() to prevent thread issues 4391 4392= PolarSSL 1.3.4 released on 2014-01-27 4393Features 4394 * Support for the Koblitz curves: secp192k1, secp224k1, secp256k1 4395 * Support for RIPEMD-160 4396 * Support for AES CFB8 mode 4397 * Support for deterministic ECDSA (RFC 6979) 4398 4399Bugfix 4400 * Potential memory leak in bignum_selftest() 4401 * Replaced expired test certificate 4402 * ssl_mail_client now terminates lines with CRLF, instead of LF 4403 * net module handles timeouts on blocking sockets better (found by Tilman 4404 Sauerbeck) 4405 * Assembly format fixes in bn_mul.h 4406 4407Security 4408 * Missing MPI_CHK calls added around unguarded mpi calls (found by 4409 TrustInSoft) 4410 4411= PolarSSL 1.3.3 released on 2013-12-31 4412Features 4413 * EC key generation support in gen_key app 4414 * Support for adhering to client ciphersuite order preference 4415 (POLARSSL_SSL_SRV_RESPECT_CLIENT_PREFERENCE) 4416 * Support for Curve25519 4417 * Support for ECDH-RSA and ECDH-ECDSA key exchanges and ciphersuites 4418 * Support for IPv6 in the NET module 4419 * AES-NI support for AES, AES-GCM and AES key scheduling 4420 * SSL Pthread-based server example added (ssl_pthread_server) 4421 4422Changes 4423 * gen_prime() speedup 4424 * Speedup of ECP multiplication operation 4425 * Relaxed some SHA2 ciphersuite's version requirements 4426 * Dropped use of readdir_r() instead of readdir() with threading support 4427 * More constant-time checks in the RSA module 4428 * Split off curves from ecp.c into ecp_curves.c 4429 * Curves are now stored fully in ROM 4430 * Memory usage optimizations in ECP module 4431 * Removed POLARSSL_THREADING_DUMMY 4432 4433Bugfix 4434 * Fixed bug in mpi_set_bit() on platforms where t_uint is wider than int 4435 * Fixed X.509 hostname comparison (with non-regular characters) 4436 * SSL now gracefully handles missing RNG 4437 * Missing defines / cases for RSA_PSK key exchange 4438 * crypt_and_hash app checks MAC before final decryption 4439 * Potential memory leak in ssl_ticket_keys_init() 4440 * Memory leak in benchmark application 4441 * Fixed x509_crt_parse_path() bug on Windows platforms 4442 * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by 4443 TrustInSoft) 4444 * Fixed potential overflow in certificate size verification in 4445 ssl_write_certificate() (found by TrustInSoft) 4446 4447Security 4448 * Possible remotely-triggered out-of-bounds memory access fixed (found by 4449 TrustInSoft) 4450 4451= PolarSSL 1.3.2 released on 2013-11-04 4452Features 4453 * PK tests added to test framework 4454 * Added optional optimization for NIST MODP curves (POLARSSL_ECP_NIST_OPTIM) 4455 * Support for Camellia-GCM mode and ciphersuites 4456 4457Changes 4458 * Padding checks in cipher layer are now constant-time 4459 * Value comparisons in SSL layer are now constant-time 4460 * Support for serialNumber, postalAddress and postalCode in X509 names 4461 * SSL Renegotiation was refactored 4462 4463Bugfix 4464 * More stringent checks in cipher layer 4465 * Server does not send out extensions not advertised by client 4466 * Prevent possible alignment warnings on casting from char * to 'aligned *' 4467 * Misc fixes and additions to dependency checks 4468 * Const correctness 4469 * cert_write with selfsign should use issuer_name as subject_name 4470 * Fix ECDSA corner case: missing reduction mod N (found by DualTachyon) 4471 * Defines to handle UEFI environment under MSVC 4472 * Server-side initiated renegotiations send HelloRequest 4473 4474= PolarSSL 1.3.1 released on 2013-10-15 4475Features 4476 * Support for Brainpool curves and TLS ciphersuites (RFC 7027) 4477 * Support for ECDHE-PSK key-exchange and ciphersuites 4478 * Support for RSA-PSK key-exchange and ciphersuites 4479 4480Changes 4481 * RSA blinding locks for a smaller amount of time 4482 * TLS compression only allocates working buffer once 4483 * Introduced POLARSSL_HAVE_READDIR_R for systems without it 4484 * config.h is more script-friendly 4485 4486Bugfix 4487 * Missing MSVC defines added 4488 * Compile errors with POLARSSL_RSA_NO_CRT 4489 * Header files with 'polarssl/' 4490 * Const correctness 4491 * Possible naming collision in dhm_context 4492 * Better support for MSVC 4493 * threading_set_alt() name 4494 * Added missing x509write_crt_set_version() 4495 4496= PolarSSL 1.3.0 released on 2013-10-01 4497Features 4498 * Elliptic Curve Cryptography module added 4499 * Elliptic Curve Diffie Hellman module added 4500 * Ephemeral Elliptic Curve Diffie Hellman support for SSL/TLS 4501 (ECDHE-based ciphersuites) 4502 * Ephemeral Elliptic Curve Digital Signature Algorithm support for SSL/TLS 4503 (ECDSA-based ciphersuites) 4504 * Ability to specify allowed ciphersuites based on the protocol version. 4505 * PSK and DHE-PSK based ciphersuites added 4506 * Memory allocation abstraction layer added 4507 * Buffer-based memory allocator added (no malloc() / free() / HEAP usage) 4508 * Threading abstraction layer added (dummy / pthread / alternate) 4509 * Public Key abstraction layer added 4510 * Parsing Elliptic Curve keys 4511 * Parsing Elliptic Curve certificates 4512 * Support for max_fragment_length extension (RFC 6066) 4513 * Support for truncated_hmac extension (RFC 6066) 4514 * Support for zeros-and-length (ANSI X.923) padding, one-and-zeros 4515 (ISO/IEC 7816-4) padding and zero padding in the cipher layer 4516 * Support for session tickets (RFC 5077) 4517 * Certificate Request (CSR) generation with extensions (key_usage, 4518 ns_cert_type) 4519 * X509 Certificate writing with extensions (basic_constraints, 4520 issuer_key_identifier, etc) 4521 * Optional blinding for RSA, DHM and EC 4522 * Support for multiple active certificate / key pairs in SSL servers for 4523 the same host (Not to be confused with SNI!) 4524 4525Changes 4526 * Ability to enable / disable SSL v3 / TLS 1.0 / TLS 1.1 / TLS 1.2 4527 individually 4528 * Introduced separate SSL Ciphersuites module that is based on 4529 Cipher and MD information 4530 * Internals for SSL module adapted to have separate IV pointer that is 4531 dynamically set (Better support for hardware acceleration) 4532 * Moved all OID functionality to a separate module. RSA function 4533 prototypes for the RSA sign and verify functions changed as a result 4534 * Split up the GCM module into a starts/update/finish cycle 4535 * Client and server now filter sent and accepted ciphersuites on minimum 4536 and maximum protocol version 4537 * Ability to disable server_name extension (RFC 6066) 4538 * Renamed error_strerror() to the less conflicting polarssl_strerror() 4539 (Ability to keep old as well with POLARSSL_ERROR_STRERROR_BC) 4540 * SHA2 renamed to SHA256, SHA4 renamed to SHA512 and functions accordingly 4541 * All RSA operations require a random generator for blinding purposes 4542 * X509 core refactored 4543 * x509_crt_verify() now case insensitive for cn (RFC 6125 6.4) 4544 * Also compiles / runs without time-based functions (!POLARSSL_HAVE_TIME) 4545 * Support faulty X509 v1 certificates with extensions 4546 (POLARSSL_X509_ALLOW_EXTENSIONS_NON_V3) 4547 4548Bugfix 4549 * Fixed parse error in ssl_parse_certificate_request() 4550 * zlib compression/decompression skipped on empty blocks 4551 * Support for AIX header locations in net.c module 4552 * Fixed file descriptor leaks 4553 4554Security 4555 * RSA blinding on CRT operations to counter timing attacks 4556 (found by Cyril Arnaud and Pierre-Alain Fouque) 4557 4558 4559= Version 1.2.14 released 2015-05-?? 4560 4561Security 4562 * Fix potential invalid memory read in the server, that allows a client to 4563 crash it remotely (found by Caj Larsson). 4564 * Fix potential invalid memory read in certificate parsing, that allows a 4565 client to crash the server remotely if client authentication is enabled 4566 (found using Codenomicon Defensics). 4567 * Add countermeasure against "Lucky 13 strikes back" cache-based attack, 4568 https://dl.acm.org/citation.cfm?id=2714625 4569 4570Bugfix 4571 * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos). 4572 * Fix hardclock() (only used in the benchmarking program) with some 4573 versions of mingw64 (found by kxjhlele). 4574 * Fix warnings from mingw64 in timing.c (found by kxjklele). 4575 * Fix potential unintended sign extension in asn1_get_len() on 64-bit 4576 platforms (found with Coverity Scan). 4577 4578= Version 1.2.13 released 2015-02-16 4579Note: Although PolarSSL has been renamed to mbed TLS, no changes reflecting 4580 this will be made in the 1.2 branch at this point. 4581 4582Security 4583 * Fix remotely-triggerable uninitialised pointer dereference caused by 4584 crafted X.509 certificate (TLS server is not affected if it doesn't ask 4585 for a client certificate) (found using Codenomicon Defensics). 4586 * Fix remotely-triggerable memory leak caused by crafted X.509 certificates 4587 (TLS server is not affected if it doesn't ask for a client certificate) 4588 (found using Codenomicon Defensics). 4589 * Fix potential stack overflow while parsing crafted X.509 certificates 4590 (TLS server is not affected if it doesn't ask for a client certificate) 4591 found using Codenomicon Defensics). 4592 * Fix buffer overread of size 1 when parsing crafted X.509 certificates 4593 (TLS server is not affected if it doesn't ask for a client certificate). 4594 4595Bugfix 4596 * Fix potential undefined behaviour in Camellia. 4597 * Fix memory leaks in PKCS#5 and PKCS#12. 4598 * Stack buffer overflow if ctr_drbg_update() is called with too large 4599 add_len (found by Jean-Philippe Aumasson) (not triggerable remotely). 4600 * Fix bug in MPI/bignum on s390/s390x (reported by Dan Horák) (introduced 4601 in 1.2.12). 4602 * Fix unchecked return code in x509_crt_parse_path() on Windows (found by 4603 Peter Vaskovic). 4604 * Fix assembly selection for MIPS64 (thanks to James Cowgill). 4605 * ssl_get_verify_result() now works even if the handshake was aborted due 4606 to a failed verification (found by Fredrik Axelsson). 4607 * Skip writing and parsing signature_algorithm extension if none of the 4608 key exchanges enabled needs certificates. This fixes a possible interop 4609 issue with some servers when a zero-length extension was sent. (Reported 4610 by Peter Dettman.) 4611 * On a 0-length input, base64_encode() did not correctly set output length 4612 (found by Hendrik van den Boogaard). 4613 4614Changes 4615 * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined. 4616 * Forbid repeated extensions in X.509 certificates. 4617 * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the 4618 length of an X.509 verification chain (default = 8). 4619= Version 1.2.12 released 2014-10-24 4620 4621Security 4622 * Remotely-triggerable memory leak when parsing some X.509 certificates 4623 (server is not affected if it doesn't ask for a client certificate). 4624 (Found using Codenomicon Defensics.) 4625 4626Bugfix 4627 * Fix potential bad read in parsing ServerHello (found by Adrien 4628 Vialletelle). 4629 * ssl_close_notify() could send more than one message in some circumstances 4630 with non-blocking I/O. 4631 * x509_crt_parse() did not increase total_failed on PEM error 4632 * Fix compiler warnings on iOS (found by Sander Niemeijer). 4633 * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel). 4634 * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce). 4635 * ssl_read() could return non-application data records on server while 4636 renegotation was pending, and on client when a HelloRequest was received. 4637 * Fix warnings from Clang's scan-build (contributed by Alfred Klomp). 4638 4639Changes 4640 * X.509 certificates with more than one AttributeTypeAndValue per 4641 RelativeDistinguishedName are not accepted any more. 4642 * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than 4643 POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts. 4644 * Accept spaces at end of line or end of buffer in base64_decode(). 4645 4646= Version 1.2.11 released 2014-07-11 4647Features 4648 * Entropy module now supports seed writing and reading 4649 4650Changes 4651 * Introduced POLARSSL_HAVE_READDIR_R for systems without it 4652 * Improvements to the CMake build system, contributed by Julian Ospald. 4653 * Work around a bug of the version of Clang shipped by Apple with Mavericks 4654 that prevented bignum.c from compiling. (Reported by Rafael Baptista.) 4655 * Improvements to tests/Makefile, contributed by Oden Eriksson. 4656 * Use UTC time to check certificate validity. 4657 * Reject certificates with times not in UTC, per RFC 5280. 4658 * Migrate zeroizing of data to polarssl_zeroize() instead of memset() 4659 against unwanted compiler optimizations 4660 4661Security 4662 * Forbid change of server certificate during renegotiation to prevent 4663 "triple handshake" attack when authentication mode is optional (the 4664 attack was already impossible when authentication is required). 4665 * Check notBefore timestamp of certificates and CRLs from the future. 4666 * Forbid sequence number wrapping 4667 * Prevent potential NULL pointer dereference in ssl_read_record() (found by 4668 TrustInSoft) 4669 * Fix length checking for AEAD ciphersuites (found by Codenomicon). 4670 It was possible to crash the server (and client) using crafted messages 4671 when a GCM suite was chosen. 4672 4673Bugfix 4674 * Fixed X.509 hostname comparison (with non-regular characters) 4675 * SSL now gracefully handles missing RNG 4676 * crypt_and_hash app checks MAC before final decryption 4677 * Fixed x509_crt_parse_path() bug on Windows platforms 4678 * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by 4679 TrustInSoft) 4680 * Fixed potential overflow in certificate size verification in 4681 ssl_write_certificate() (found by TrustInSoft) 4682 * Fix ASM format in bn_mul.h 4683 * Potential memory leak in bignum_selftest() 4684 * Replaced expired test certificate 4685 * ssl_mail_client now terminates lines with CRLF, instead of LF 4686 * Fix bug in RSA PKCS#1 v1.5 "reversed" operations 4687 * Fixed testing with out-of-source builds using cmake 4688 * Fixed version-major intolerance in server 4689 * Fixed CMake symlinking on out-of-source builds 4690 * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by 4691 Alex Wilson.) 4692 * ssl_init() was leaving a dirty pointer in ssl_context if malloc of 4693 out_ctr failed 4694 * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc 4695 of one of them failed 4696 * x509_get_current_time() uses localtime_r() to prevent thread issues 4697 * Some example server programs were not sending the close_notify alert. 4698 * Potential memory leak in mpi_exp_mod() when error occurs during 4699 calculation of RR. 4700 * Improve interoperability by not writing extension length in ClientHello 4701 when no extensions are present (found by Matthew Page) 4702 * rsa_check_pubkey() now allows an E up to N 4703 * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings 4704 * mpi_fill_random() was creating numbers larger than requested on 4705 big-endian platform when size was not an integer number of limbs 4706 * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer) 4707 * Stricter check on SSL ClientHello internal sizes compared to actual packet 4708 size (found by TrustInSoft) 4709 * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan). 4710 * Use \n\t rather than semicolons for bn_mul asm, since some assemblers 4711 interpret semicolons as comment delimiters (found by Barry K. Nathan). 4712 * Disable broken Sparc64 bn_mul assembly (found by Florian Obser). 4713 * Fix base64_decode() to return and check length correctly (in case of 4714 tight buffers) 4715 4716= Version 1.2.10 released 2013-10-07 4717Changes 4718 * Changed RSA blinding to a slower but thread-safe version 4719 4720Bugfix 4721 * Fixed memory leak in RSA as a result of introduction of blinding 4722 * Fixed ssl_pkcs11_decrypt() prototype 4723 * Fixed MSVC project files 4724 4725= Version 1.2.9 released 2013-10-01 4726Changes 4727 * x509_verify() now case insensitive for cn (RFC 6125 6.4) 4728 4729Bugfix 4730 * Fixed potential memory leak when failing to resume a session 4731 * Fixed potential file descriptor leaks (found by Remi Gacogne) 4732 * Minor fixes 4733 4734Security 4735 * Fixed potential heap buffer overflow on large hostname setting 4736 * Fixed potential negative value misinterpretation in load_file() 4737 * RSA blinding on CRT operations to counter timing attacks 4738 (found by Cyril Arnaud and Pierre-Alain Fouque) 4739 4740= Version 1.2.8 released 2013-06-19 4741Features 4742 * Parsing of PKCS#8 encrypted private key files 4743 * PKCS#12 PBE and derivation functions 4744 * Centralized module option values in config.h to allow user-defined 4745 settings without editing header files by using POLARSSL_CONFIG_OPTIONS 4746 4747Changes 4748 * HAVEGE random generator disabled by default 4749 * Internally split up x509parse_key() into a (PEM) handler function 4750 and specific DER parser functions for the PKCS#1 and unencrypted 4751 PKCS#8 private key formats 4752 * Added mechanism to provide alternative implementations for all 4753 symmetric cipher and hash algorithms (e.g. POLARSSL_AES_ALT in 4754 config.h) 4755 * PKCS#5 module added. Moved PBKDF2 functionality inside and deprecated 4756 old PBKDF2 module 4757 4758Bugfix 4759 * Secure renegotiation extension should only be sent in case client 4760 supports secure renegotiation 4761 * Fixed offset for cert_type list in ssl_parse_certificate_request() 4762 * Fixed const correctness issues that have no impact on the ABI 4763 * x509parse_crt() now better handles PEM error situations 4764 * ssl_parse_certificate() now calls x509parse_crt_der() directly 4765 instead of the x509parse_crt() wrapper that can also parse PEM 4766 certificates 4767 * x509parse_crtpath() is now reentrant and uses more portable stat() 4768 * Fixed bignum.c and bn_mul.h to support Thumb2 and LLVM compiler 4769 * Fixed values for 2-key Triple DES in cipher layer 4770 * ssl_write_certificate_request() can handle empty ca_chain 4771 4772Security 4773 * A possible DoS during the SSL Handshake, due to faulty parsing of 4774 PEM-encoded certificates has been fixed (found by Jack Lloyd) 4775 4776= Version 1.2.7 released 2013-04-13 4777Features 4778 * Ability to specify allowed ciphersuites based on the protocol version. 4779 4780Changes 4781 * Default Blowfish keysize is now 128-bits 4782 * Test suites made smaller to accommodate Raspberry Pi 4783 4784Bugfix 4785 * Fix for MPI assembly for ARM 4786 * GCM adapted to support sizes > 2^29 4787 4788= Version 1.2.6 released 2013-03-11 4789Bugfix 4790 * Fixed memory leak in ssl_free() and ssl_reset() for active session 4791 * Corrected GCM counter incrementation to use only 32-bits instead of 4792 128-bits (found by Yawning Angel) 4793 * Fixes for 64-bit compilation with MS Visual Studio 4794 * Fixed net_bind() for specified IP addresses on little endian systems 4795 * Fixed assembly code for ARM (Thumb and regular) for some compilers 4796 4797Changes 4798 * Internally split up rsa_pkcs1_encrypt(), rsa_pkcs1_decrypt(), 4799 rsa_pkcs1_sign() and rsa_pkcs1_verify() to separate PKCS#1 v1.5 and 4800 PKCS#1 v2.1 functions 4801 * Added support for custom labels when using rsa_rsaes_oaep_encrypt() 4802 or rsa_rsaes_oaep_decrypt() 4803 * Re-added handling for SSLv2 Client Hello when the define 4804 POLARSSL_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is set 4805 * The SSL session cache module (ssl_cache) now also retains peer_cert 4806 information (not the entire chain) 4807 4808Security 4809 * Removed further timing differences during SSL message decryption in 4810 ssl_decrypt_buf() 4811 * Removed timing differences due to bad padding from 4812 rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5 4813 operations 4814 4815= Version 1.2.5 released 2013-02-02 4816Changes 4817 * Allow enabling of dummy error_strerror() to support some use-cases 4818 * Debug messages about padding errors during SSL message decryption are 4819 disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL 4820 * Sending of security-relevant alert messages that do not break 4821 interoperability can be switched on/off with the flag 4822 POLARSSL_SSL_ALL_ALERT_MESSAGES 4823 4824Security 4825 * Removed timing differences during SSL message decryption in 4826 ssl_decrypt_buf() due to badly formatted padding 4827 4828= Version 1.2.4 released 2013-01-25 4829Changes 4830 * More advanced SSL ciphersuite representation and moved to more dynamic 4831 SSL core 4832 * Added ssl_handshake_step() to allow single stepping the handshake process 4833 4834Bugfix 4835 * Memory leak when using RSA_PKCS_V21 operations fixed 4836 * Handle future version properly in ssl_write_certificate_request() 4837 * Correctly handle CertificateRequest message in client for <= TLS 1.1 4838 without DN list 4839 4840= Version 1.2.3 released 2012-11-26 4841Bugfix 4842 * Server not always sending correct CertificateRequest message 4843 4844= Version 1.2.2 released 2012-11-24 4845Changes 4846 * Added p_hw_data to ssl_context for context specific hardware acceleration 4847 data 4848 * During verify trust-CA is only checked for expiration and CRL presence 4849 4850Bugfixes 4851 * Fixed client authentication compatibility 4852 * Fixed dependency on POLARSSL_SHA4_C in SSL modules 4853 4854= Version 1.2.1 released 2012-11-20 4855Changes 4856 * Depth that the certificate verify callback receives is now numbered 4857 bottom-up (Peer cert depth is 0) 4858 4859Bugfixes 4860 * Fixes for MSVC6 4861 * Moved mpi_inv_mod() outside POLARSSL_GENPRIME 4862 * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel 4863 Pégourié-Gonnard) 4864 * Fixed possible segfault in mpi_shift_r() (found by Manuel 4865 Pégourié-Gonnard) 4866 * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1 4867 4868= Version 1.2.0 released 2012-10-31 4869Features 4870 * Added support for NULL cipher (POLARSSL_CIPHER_NULL_CIPHER) and weak 4871 ciphersuites (POLARSSL_ENABLE_WEAK_CIPHERSUITES). They are disabled by 4872 default! 4873 * Added support for wildcard certificates 4874 * Added support for multi-domain certificates through the X509 Subject 4875 Alternative Name extension 4876 * Added preliminary ASN.1 buffer writing support 4877 * Added preliminary X509 Certificate Request writing support 4878 * Added key_app_writer example application 4879 * Added cert_req example application 4880 * Added base Galois Counter Mode (GCM) for AES 4881 * Added TLS 1.2 support (RFC 5246) 4882 * Added GCM suites to TLS 1.2 (RFC 5288) 4883 * Added commandline error code convertor (util/strerror) 4884 * Added support for Hardware Acceleration hooking in SSL/TLS 4885 * Added OpenSSL / PolarSSL compatibility script (tests/compat.sh) and 4886 example application (programs/ssl/o_p_test) (requires OpenSSL) 4887 * Added X509 CA Path support 4888 * Added Thumb assembly optimizations 4889 * Added DEFLATE compression support as per RFC3749 (requires zlib) 4890 * Added blowfish algorithm (Generic and cipher layer) 4891 * Added PKCS#5 PBKDF2 key derivation function 4892 * Added Secure Renegotiation (RFC 5746) 4893 * Added predefined DHM groups from RFC 5114 4894 * Added simple SSL session cache implementation 4895 * Added ServerName extension parsing (SNI) at server side 4896 * Added option to add minimum accepted SSL/TLS protocol version 4897 4898Changes 4899 * Removed redundant POLARSSL_DEBUG_MSG define 4900 * AES code only check for Padlock once 4901 * Fixed const-correctness mpi_get_bit() 4902 * Documentation for mpi_lsb() and mpi_msb() 4903 * Moved out_msg to out_hdr + 32 to support hardware acceleration 4904 * Changed certificate verify behaviour to comply with RFC 6125 section 6.3 4905 to not match CN if subjectAltName extension is present (Closes ticket #56) 4906 * Cipher layer cipher_mode_t POLARSSL_MODE_CFB128 is renamed to 4907 POLARSSL_MODE_CFB, to also handle different block size CFB modes. 4908 * Removed handling for SSLv2 Client Hello (as per RFC 5246 recommendation) 4909 * Revamped session resumption handling 4910 * Generalized external private key implementation handling (like PKCS#11) 4911 in SSL/TLS 4912 * Revamped x509_verify() and the SSL f_vrfy callback implementations 4913 * Moved from unsigned long to fixed width uint32_t types throughout code 4914 * Renamed ciphersuites naming scheme to IANA reserved names 4915 4916Bugfix 4917 * Fixed handling error in mpi_cmp_mpi() on longer B values (found by 4918 Hui Dong) 4919 * Fixed potential heap corruption in x509_name allocation 4920 * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54) 4921 * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket 4922 #52) 4923 * Handle encryption with private key and decryption with public key as per 4924 RFC 2313 4925 * Handle empty certificate subject names 4926 * Prevent reading over buffer boundaries on X509 certificate parsing 4927 * mpi_add_abs() now correctly handles adding short numbers to long numbers 4928 with carry rollover (found by Ruslan Yushchenko) 4929 * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob 4930 * Fixed MPI assembly for SPARC64 platform 4931 4932Security 4933 * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi 4934 Vanderbeken) 4935 4936= Version 1.1.8 released on 2013-10-01 4937Bugfix 4938 * Fixed potential memory leak when failing to resume a session 4939 * Fixed potential file descriptor leaks 4940 4941Security 4942 * Potential buffer-overflow for ssl_read_record() (independently found by 4943 both TrustInSoft and Paul Brodeur of Leviathan Security Group) 4944 * Potential negative value misinterpretation in load_file() 4945 * Potential heap buffer overflow on large hostname setting 4946 4947= Version 1.1.7 released on 2013-06-19 4948Changes 4949 * HAVEGE random generator disabled by default 4950 4951Bugfix 4952 * x509parse_crt() now better handles PEM error situations 4953 * ssl_parse_certificate() now calls x509parse_crt_der() directly 4954 instead of the x509parse_crt() wrapper that can also parse PEM 4955 certificates 4956 * Fixed values for 2-key Triple DES in cipher layer 4957 * ssl_write_certificate_request() can handle empty ca_chain 4958 4959Security 4960 * A possible DoS during the SSL Handshake, due to faulty parsing of 4961 PEM-encoded certificates has been fixed (found by Jack Lloyd) 4962 4963= Version 1.1.6 released on 2013-03-11 4964Bugfix 4965 * Fixed net_bind() for specified IP addresses on little endian systems 4966 4967Changes 4968 * Allow enabling of dummy error_strerror() to support some use-cases 4969 * Debug messages about padding errors during SSL message decryption are 4970 disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL 4971 4972Security 4973 * Removed timing differences during SSL message decryption in 4974 ssl_decrypt_buf() 4975 * Removed timing differences due to bad padding from 4976 rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5 4977 operations 4978 4979= Version 1.1.5 released on 2013-01-16 4980Bugfix 4981 * Fixed MPI assembly for SPARC64 platform 4982 * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob 4983 * mpi_add_abs() now correctly handles adding short numbers to long numbers 4984 with carry rollover 4985 * Moved mpi_inv_mod() outside POLARSSL_GENPRIME 4986 * Prevent reading over buffer boundaries on X509 certificate parsing 4987 * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket 4988 #52) 4989 * Fixed possible segfault in mpi_shift_r() (found by Manuel 4990 Pégourié-Gonnard) 4991 * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel 4992 Pégourié-Gonnard) 4993 * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1 4994 * Memory leak when using RSA_PKCS_V21 operations fixed 4995 * Handle encryption with private key and decryption with public key as per 4996 RFC 2313 4997 * Fixes for MSVC6 4998 4999Security 5000 * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi 5001 Vanderbeken) 5002 5003= Version 1.1.4 released on 2012-05-31 5004Bugfix 5005 * Correctly handle empty SSL/TLS packets (Found by James Yonan) 5006 * Fixed potential heap corruption in x509_name allocation 5007 * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54) 5008 5009= Version 1.1.3 released on 2012-04-29 5010Bugfix 5011 * Fixed random MPI generation to not generate more size than requested. 5012 5013= Version 1.1.2 released on 2012-04-26 5014Bugfix 5015 * Fixed handling error in mpi_cmp_mpi() on longer B values (found by 5016 Hui Dong) 5017 5018Security 5019 * Fixed potential memory corruption on miscrafted client messages (found by 5020 Frama-C team at CEA LIST) 5021 * Fixed generation of DHM parameters to correct length (found by Ruslan 5022 Yushchenko) 5023 5024= Version 1.1.1 released on 2012-01-23 5025Bugfix 5026 * Check for failed malloc() in ssl_set_hostname() and x509_get_entries() 5027 (Closes ticket #47, found by Hugo Leisink) 5028 * Fixed issues with Intel compiler on 64-bit systems (Closes ticket #50) 5029 * Fixed multiple compiler warnings for VS6 and armcc 5030 * Fixed bug in CTR_CRBG selftest 5031 5032= Version 1.1.0 released on 2011-12-22 5033Features 5034 * Added ssl_session_reset() to allow better multi-connection pools of 5035 SSL contexts without needing to set all non-connection-specific 5036 data and pointers again. Adapted ssl_server to use this functionality. 5037 * Added ssl_set_max_version() to allow clients to offer a lower maximum 5038 supported version to a server to help buggy server implementations. 5039 (Closes ticket #36) 5040 * Added cipher_get_cipher_mode() and cipher_get_cipher_operation() 5041 introspection functions (Closes ticket #40) 5042 * Added CTR_DRBG based on AES-256-CTR (NIST SP 800-90) random generator 5043 * Added a generic entropy accumulator that provides support for adding 5044 custom entropy sources and added some generic and platform dependent 5045 entropy sources 5046 5047Changes 5048 * Documentation for AES and Camellia in modes CTR and CFB128 clarified. 5049 * Fixed rsa_encrypt and rsa_decrypt examples to use public key for 5050 encryption and private key for decryption. (Closes ticket #34) 5051 * Inceased maximum size of ASN1 length reads to 32-bits. 5052 * Added an EXPLICIT tag number parameter to x509_get_ext() 5053 * Added a separate CRL entry extension parsing function 5054 * Separated the ASN.1 parsing code from the X.509 specific parsing code. 5055 So now there is a module that is controlled with POLARSSL_ASN1_PARSE_C. 5056 * Changed the defined key-length of DES ciphers in cipher.h to include the 5057 parity bits, to prevent mistakes in copying data. (Closes ticket #33) 5058 * Loads of minimal changes to better support WINCE as a build target 5059 (Credits go to Marco Lizza) 5060 * Added POLARSSL_MPI_WINDOW_SIZE definition to allow easier time to memory 5061 trade-off 5062 * Introduced POLARSSL_MPI_MAX_SIZE and POLARSSL_MPI_MAX_BITS for MPI size 5063 management (Closes ticket #44) 5064 * Changed the used random function pointer to more flexible format. Renamed 5065 havege_rand() to havege_random() to prevent mistakes. Lots of changes as 5066 a consequence in library code and programs 5067 * Moved all examples programs to use the new entropy and CTR_DRBG 5068 * Added permissive certificate parsing to x509parse_crt() and 5069 x509parse_crtfile(). With permissive parsing the parsing does not stop on 5070 encountering a parse-error. Beware that the meaning of return values has 5071 changed! 5072 * All error codes are now negative. Even on mermory failures and IO errors. 5073 5074Bugfix 5075 * Fixed faulty HMAC-MD2 implementation. Found by dibac. (Closes 5076 ticket #37) 5077 * Fixed a bug where the CRL parser expected an EXPLICIT ASN.1 tag 5078 before version numbers 5079 * Allowed X509 key usage parsing to accept 4 byte values instead of the 5080 standard 1 byte version sometimes used by Microsoft. (Closes ticket #38) 5081 * Fixed incorrect behaviour in case of RSASSA-PSS with a salt length 5082 smaller than the hash length. (Closes ticket #41) 5083 * If certificate serial is longer than 32 octets, serial number is now 5084 appended with '....' after first 28 octets 5085 * Improved build support for s390x and sparc64 in bignum.h 5086 * Fixed MS Visual C++ name clash with int64 in sha4.h 5087 * Corrected removal of leading "00:" in printing serial numbers in 5088 certificates and CRLs 5089 5090= Version 1.0.0 released on 2011-07-27 5091Features 5092 * Expanded cipher layer with support for CFB128 and CTR mode 5093 * Added rsa_encrypt and rsa_decrypt simple example programs. 5094 5095Changes 5096 * The generic cipher and message digest layer now have normal error 5097 codes instead of integers 5098 5099Bugfix 5100 * Undid faulty bug fix in ssl_write() when flushing old data (Ticket 5101 #18) 5102 5103= Version 0.99-pre5 released on 2011-05-26 5104Features 5105 * Added additional Cipher Block Modes to symmetric ciphers 5106 (AES CTR, Camellia CTR, XTEA CBC) including the option to 5107 enable and disable individual modes when needed 5108 * Functions requiring File System functions can now be disabled 5109 by undefining POLARSSL_FS_IO 5110 * A error_strerror function() has been added to translate between 5111 error codes and their description. 5112 * Added mpi_get_bit() and mpi_set_bit() individual bit setter/getter 5113 functions. 5114 * Added ssl_mail_client and ssl_fork_server as example programs. 5115 5116Changes 5117 * Major argument / variable rewrite. Introduced use of size_t 5118 instead of int for buffer lengths and loop variables for 5119 better unsigned / signed use. Renamed internal bigint types 5120 t_int and t_dbl to t_uint and t_udbl in the process 5121 * mpi_init() and mpi_free() now only accept a single MPI 5122 argument and do not accept variable argument lists anymore. 5123 * The error codes have been remapped and combining error codes 5124 is now done with a PLUS instead of an OR as error codes 5125 used are negative. 5126 * Changed behaviour of net_read(), ssl_fetch_input() and ssl_recv(). 5127 net_recv() now returns 0 on EOF instead of 5128 POLARSSL_ERR_NET_CONN_RESET. ssl_fetch_input() returns 5129 POLARSSL_ERR_SSL_CONN_EOF on an EOF from its f_recv() function. 5130 ssl_read() returns 0 if a POLARSSL_ERR_SSL_CONN_EOF is received 5131 after the handshake. 5132 * Network functions now return POLARSSL_ERR_NET_WANT_READ or 5133 POLARSSL_ERR_NET_WANT_WRITE instead of the ambiguous 5134 POLARSSL_ERR_NET_TRY_AGAIN 5135 5136= Version 0.99-pre4 released on 2011-04-01 5137Features 5138 * Added support for PKCS#1 v2.1 encoding and thus support 5139 for the RSAES-OAEP and RSASSA-PSS operations. 5140 * Reading of Public Key files incorporated into default x509 5141 functionality as well. 5142 * Added mpi_fill_random() for centralized filling of big numbers 5143 with random data (Fixed ticket #10) 5144 5145Changes 5146 * Debug print of MPI now removes leading zero octets and 5147 displays actual bit size of the value. 5148 * x509parse_key() (and as a consequence x509parse_keyfile()) 5149 does not zeroize memory in advance anymore. Use rsa_init() 5150 before parsing a key or keyfile! 5151 5152Bugfix 5153 * Debug output of MPI's now the same independent of underlying 5154 platform (32-bit / 64-bit) (Fixes ticket #19, found by Mads 5155 Kiilerich and Mihai Militaru) 5156 * Fixed bug in ssl_write() when flushing old data (Fixed ticket 5157 #18, found by Nikolay Epifanov) 5158 * Fixed proper handling of RSASSA-PSS verification with variable 5159 length salt lengths 5160 5161= Version 0.99-pre3 released on 2011-02-28 5162This release replaces version 0.99-pre2 which had possible copyright issues. 5163Features 5164 * Parsing PEM private keys encrypted with DES and AES 5165 are now supported as well (Fixes ticket #5) 5166 * Added crl_app program to allow easy reading and 5167 printing of X509 CRLs from file 5168 5169Changes 5170 * Parsing of PEM files moved to separate module (Fixes 5171 ticket #13). Also possible to remove PEM support for 5172 systems only using DER encoding 5173 5174Bugfixes 5175 * Corrected parsing of UTCTime dates before 1990 and 5176 after 1950 5177 * Support more exotic OID's when parsing certificates 5178 (found by Mads Kiilerich) 5179 * Support more exotic name representations when parsing 5180 certificates (found by Mads Kiilerich) 5181 * Replaced the expired test certificates 5182 * Do not bail out if no client certificate specified. Try 5183 to negotiate anonymous connection (Fixes ticket #12, 5184 found by Boris Krasnovskiy) 5185 5186Security fixes 5187 * Fixed a possible Man-in-the-Middle attack on the 5188 Diffie Hellman key exchange (thanks to Larry Highsmith, 5189 Subreption LLC) 5190 5191= Version 0.99-pre1 released on 2011-01-30 5192Features 5193Note: Most of these features have been donated by Fox-IT 5194 * Added Doxygen source code documentation parts 5195 * Added reading of DHM context from memory and file 5196 * Improved X509 certificate parsing to include extended 5197 certificate fields, including Key Usage 5198 * Improved certificate verification and verification 5199 against the available CRLs 5200 * Detection for DES weak keys and parity bits added 5201 * Improvements to support integration in other 5202 applications: 5203 + Added generic message digest and cipher wrapper 5204 + Improved information about current capabilities, 5205 status, objects and configuration 5206 + Added verification callback on certificate chain 5207 verification to allow external blacklisting 5208 + Additional example programs to show usage 5209 * Added support for PKCS#11 through the use of the 5210 libpkcs11-helper library 5211 5212Changes 5213 * x509parse_time_expired() checks time in addition to 5214 the existing date check 5215 * The ciphers member of ssl_context and the cipher member 5216 of ssl_session have been renamed to ciphersuites and 5217 ciphersuite respectively. This clarifies the difference 5218 with the generic cipher layer and is better naming 5219 altogether 5220 5221= Version 0.14.0 released on 2010-08-16 5222Features 5223 * Added support for SSL_EDH_RSA_AES_128_SHA and 5224 SSL_EDH_RSA_CAMELLIA_128_SHA ciphersuites 5225 * Added compile-time and run-time version information 5226 * Expanded ssl_client2 arguments for more flexibility 5227 * Added support for TLS v1.1 5228 5229Changes 5230 * Made Makefile cleaner 5231 * Removed dependency on rand() in rsa_pkcs1_encrypt(). 5232 Now using random fuction provided to function and 5233 changed the prototype of rsa_pkcs1_encrypt(), 5234 rsa_init() and rsa_gen_key(). 5235 * Some SSL defines were renamed in order to avoid 5236 future confusion 5237 5238Bug fixes 5239 * Fixed CMake out of source build for tests (found by 5240 kkert) 5241 * rsa_check_private() now supports PKCS1v2 keys as well 5242 * Fixed deadlock in rsa_pkcs1_encrypt() on failing random 5243 generator 5244 5245= Version 0.13.1 released on 2010-03-24 5246Bug fixes 5247 * Fixed Makefile in library that was mistakenly merged 5248 * Added missing const string fixes 5249 5250= Version 0.13.0 released on 2010-03-21 5251Features 5252 * Added option parsing for host and port selection to 5253 ssl_client2 5254 * Added support for GeneralizedTime in X509 parsing 5255 * Added cert_app program to allow easy reading and 5256 printing of X509 certificates from file or SSL 5257 connection. 5258 5259Changes 5260 * Added const correctness for main code base 5261 * X509 signature algorithm determination is now 5262 in a function to allow easy future expansion 5263 * Changed symmetric cipher functions to 5264 identical interface (returning int result values) 5265 * Changed ARC4 to use separate input/output buffer 5266 * Added reset function for HMAC context as speed-up 5267 for specific use-cases 5268 5269Bug fixes 5270 * Fixed bug resulting in failure to send the last 5271 certificate in the chain in ssl_write_certificate() and 5272 ssl_write_certificate_request() (found by fatbob) 5273 * Added small fixes for compiler warnings on a Mac 5274 (found by Frank de Brabander) 5275 * Fixed algorithmic bug in mpi_is_prime() (found by 5276 Smbat Tonoyan) 5277 5278= Version 0.12.1 released on 2009-10-04 5279Changes 5280 * Coverage test definitions now support 'depends_on' 5281 tagging system. 5282 * Tests requiring specific hashing algorithms now honor 5283 the defines. 5284 5285Bug fixes 5286 * Changed typo in #ifdef in x509parse.c (found 5287 by Eduardo) 5288 5289= Version 0.12.0 released on 2009-07-28 5290Features 5291 * Added CMake makefiles as alternative to regular Makefiles. 5292 * Added preliminary Code Coverage tests for AES, ARC4, 5293 Base64, MPI, SHA-family, MD-family, HMAC-SHA-family, 5294 Camellia, DES, 3-DES, RSA PKCS#1, XTEA, Diffie-Hellman 5295 and X509parse. 5296 5297Changes 5298 * Error codes are not (necessarily) negative. Keep 5299 this is mind when checking for errors. 5300 * RSA_RAW renamed to SIG_RSA_RAW for consistency. 5301 * Fixed typo in name of POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE. 5302 * Changed interface for AES and Camellia setkey functions 5303 to indicate invalid key lengths. 5304 5305Bug fixes 5306 * Fixed include location of endian.h on FreeBSD (found by 5307 Gabriel) 5308 * Fixed include location of endian.h and name clash on 5309 Apples (found by Martin van Hensbergen) 5310 * Fixed HMAC-MD2 by modifying md2_starts(), so that the 5311 required HMAC ipad and opad variables are not cleared. 5312 (found by code coverage tests) 5313 * Prevented use of long long in bignum if 5314 POLARSSL_HAVE_LONGLONG not defined (found by Giles 5315 Bathgate). 5316 * Fixed incorrect handling of negative strings in 5317 mpi_read_string() (found by code coverage tests). 5318 * Fixed segfault on handling empty rsa_context in 5319 rsa_check_pubkey() and rsa_check_privkey() (found by 5320 code coverage tests). 5321 * Fixed incorrect handling of one single negative input 5322 value in mpi_add_abs() (found by code coverage tests). 5323 * Fixed incorrect handling of negative first input 5324 value in mpi_sub_abs() (found by code coverage tests). 5325 * Fixed incorrect handling of negative first input 5326 value in mpi_mod_mpi() and mpi_mod_int(). Resulting 5327 change also affects mpi_write_string() (found by code 5328 coverage tests). 5329 * Corrected is_prime() results for 0, 1 and 2 (found by 5330 code coverage tests). 5331 * Fixed Camellia and XTEA for 64-bit Windows systems. 5332 5333= Version 0.11.1 released on 2009-05-17 5334 * Fixed missing functionality for SHA-224, SHA-256, SHA384, 5335 SHA-512 in rsa_pkcs1_sign() 5336 5337= Version 0.11.0 released on 2009-05-03 5338 * Fixed a bug in mpi_gcd() so that it also works when both 5339 input numbers are even and added testcases to check 5340 (found by Pierre Habouzit). 5341 * Added support for SHA-224, SHA-256, SHA-384 and SHA-512 5342 one way hash functions with the PKCS#1 v1.5 signing and 5343 verification. 5344 * Fixed minor bug regarding mpi_gcd located within the 5345 POLARSSL_GENPRIME block. 5346 * Fixed minor memory leak in x509parse_crt() and added better 5347 handling of 'full' certificate chains (found by Mathias 5348 Olsson). 5349 * Centralized file opening and reading for x509 files into 5350 load_file() 5351 * Made definition of net_htons() endian-clean for big endian 5352 systems (Found by Gernot). 5353 * Undefining POLARSSL_HAVE_ASM now also handles prevents asm in 5354 padlock and timing code. 5355 * Fixed an off-by-one buffer allocation in ssl_set_hostname() 5356 responsible for crashes and unwanted behaviour. 5357 * Added support for Certificate Revocation List (CRL) parsing. 5358 * Added support for CRL revocation to x509parse_verify() and 5359 SSL/TLS code. 5360 * Fixed compatibility of XTEA and Camellia on a 64-bit system 5361 (found by Felix von Leitner). 5362 5363= Version 0.10.0 released on 2009-01-12 5364 * Migrated XySSL to PolarSSL 5365 * Added XTEA symmetric cipher 5366 * Added Camellia symmetric cipher 5367 * Added support for ciphersuites: SSL_RSA_CAMELLIA_128_SHA, 5368 SSL_RSA_CAMELLIA_256_SHA and SSL_EDH_RSA_CAMELLIA_256_SHA 5369 * Fixed dangerous bug that can cause a heap overflow in 5370 rsa_pkcs1_decrypt (found by Christophe Devine) 5371 5372================================================================ 5373XySSL ChangeLog 5374 5375= Version 0.9 released on 2008-03-16 5376 5377 * Added support for ciphersuite: SSL_RSA_AES_128_SHA 5378 * Enabled support for large files by default in aescrypt2.c 5379 * Preliminary openssl wrapper contributed by David Barrett 5380 * Fixed a bug in ssl_write() that caused the same payload to 5381 be sent twice in non-blocking mode when send returns EAGAIN 5382 * Fixed ssl_parse_client_hello(): session id and challenge must 5383 not be swapped in the SSLv2 ClientHello (found by Greg Robson) 5384 * Added user-defined callback debug function (Krystian Kolodziej) 5385 * Before freeing a certificate, properly zero out all cert. data 5386 * Fixed the "mode" parameter so that encryption/decryption are 5387 not swapped on PadLock; also fixed compilation on older versions 5388 of gcc (bug reported by David Barrett) 5389 * Correctly handle the case in padlock_xcryptcbc() when input or 5390 output data is non-aligned by falling back to the software 5391 implementation, as VIA Nehemiah cannot handle non-aligned buffers 5392 * Fixed a memory leak in x509parse_crt() which was reported by Greg 5393 Robson-Garth; some x509write.c fixes by Pascal Vizeli, thanks to 5394 Matthew Page who reported several bugs 5395 * Fixed x509_get_ext() to accept some rare certificates which have 5396 an INTEGER instead of a BOOLEAN for BasicConstraints::cA. 5397 * Added support on the client side for the TLS "hostname" extension 5398 (patch contributed by David Patino) 5399 * Make x509parse_verify() return BADCERT_CN_MISMATCH when an empty 5400 string is passed as the CN (bug reported by spoofy) 5401 * Added an option to enable/disable the BN assembly code 5402 * Updated rsa_check_privkey() to verify that (D*E) = 1 % (P-1)*(Q-1) 5403 * Disabled obsolete hash functions by default (MD2, MD4); updated 5404 selftest and benchmark to not test ciphers that have been disabled 5405 * Updated x509parse_cert_info() to correctly display byte 0 of the 5406 serial number, setup correct server port in the ssl client example 5407 * Fixed a critical denial-of-service with X.509 cert. verification: 5408 peer may cause xyssl to loop indefinitely by sending a certificate 5409 for which the RSA signature check fails (bug reported by Benoit) 5410 * Added test vectors for: AES-CBC, AES-CFB, DES-CBC and 3DES-CBC, 5411 HMAC-MD5, HMAC-SHA1, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 5412 * Fixed HMAC-SHA-384 and HMAC-SHA-512 (thanks to Josh Sinykin) 5413 * Modified ssl_parse_client_key_exchange() to protect against 5414 Daniel Bleichenbacher attack on PKCS#1 v1.5 padding, as well 5415 as the Klima-Pokorny-Rosa extension of Bleichenbacher's attack 5416 * Updated rsa_gen_key() so that ctx->N is always nbits in size 5417 * Fixed assembly PPC compilation errors on Mac OS X, thanks to 5418 David Barrett and Dusan Semen 5419 5420= Version 0.8 released on 2007-10-20 5421 5422 * Modified the HMAC functions to handle keys larger 5423 than 64 bytes, thanks to Stephane Desneux and gary ng 5424 * Fixed ssl_read_record() to properly update the handshake 5425 message digests, which fixes IE6/IE7 client authentication 5426 * Cleaned up the XYSSL* #defines, suggested by Azriel Fasten 5427 * Fixed net_recv(), thanks to Lorenz Schori and Egon Kocjan 5428 * Added user-defined callbacks for handling I/O and sessions 5429 * Added lots of debugging output in the SSL/TLS functions 5430 * Added preliminary X.509 cert. writing by Pascal Vizeli 5431 * Added preliminary support for the VIA PadLock routines 5432 * Added AES-CFB mode of operation, contributed by chmike 5433 * Added an SSL/TLS stress testing program (ssl_test.c) 5434 * Updated the RSA PKCS#1 code to allow choosing between 5435 RSA_PUBLIC and RSA_PRIVATE, as suggested by David Barrett 5436 * Updated ssl_read() to skip 0-length records from OpenSSL 5437 * Fixed the make install target to comply with *BSD make 5438 * Fixed a bug in mpi_read_binary() on 64-bit platforms 5439 * mpi_is_prime() speedups, thanks to Kevin McLaughlin 5440 * Fixed a long standing memory leak in mpi_is_prime() 5441 * Replaced realloc with malloc in mpi_grow(), and set 5442 the sign of zero as positive in mpi_init() (reported 5443 by Jonathan M. McCune) 5444 5445= Version 0.7 released on 2007-07-07 5446 5447 * Added support for the MicroBlaze soft-core processor 5448 * Fixed a bug in ssl_tls.c which sometimes prevented SSL 5449 connections from being established with non-blocking I/O 5450 * Fixed a couple bugs in the VS6 and UNIX Makefiles 5451 * Fixed the "PIC register ebx clobbered in asm" bug 5452 * Added HMAC starts/update/finish support functions 5453 * Added the SHA-224, SHA-384 and SHA-512 hash functions 5454 * Fixed the net_set_*block routines, thanks to Andreas 5455 * Added a few demonstration programs: md5sum, sha1sum, 5456 dh_client, dh_server, rsa_genkey, rsa_sign, rsa_verify 5457 * Added new bignum import and export helper functions 5458 * Rewrote README.txt in program/ssl/ca to better explain 5459 how to create a test PKI 5460 5461= Version 0.6 released on 2007-04-01 5462 5463 * Ciphers used in SSL/TLS can now be disabled at compile 5464 time, to reduce the memory footprint on embedded systems 5465 * Added multiply assembly code for the TriCore and modified 5466 havege_struct for this processor, thanks to David Patiño 5467 * Added multiply assembly code for 64-bit PowerPCs, 5468 thanks to Peking University and the OSU Open Source Lab 5469 * Added experimental support of Quantum Cryptography 5470 * Added support for autoconf, contributed by Arnaud Cornet 5471 * Fixed "long long" compilation issues on IA-64 and PPC64 5472 * Fixed a bug introduced in xyssl-0.5/timing.c: hardclock 5473 was not being correctly defined on ARM and MIPS 5474 5475= Version 0.5 released on 2007-03-01 5476 5477 * Added multiply assembly code for SPARC and Alpha 5478 * Added (beta) support for non-blocking I/O operations 5479 * Implemented session resuming and client authentication 5480 * Fixed some portability issues on WinCE, MINIX 3, Plan9 5481 (thanks to Benjamin Newman), HP-UX, FreeBSD and Solaris 5482 * Improved the performance of the EDH key exchange 5483 * Fixed a bug that caused valid packets with a payload 5484 size of 16384 bytes to be rejected 5485 5486= Version 0.4 released on 2007-02-01 5487 5488 * Added support for Ephemeral Diffie-Hellman key exchange 5489 * Added multiply asm code for SSE2, ARM, PPC, MIPS and M68K 5490 * Various improvement to the modular exponentiation code 5491 * Rewrote the headers to generate the API docs with doxygen 5492 * Fixed a bug in ssl_encrypt_buf (incorrect padding was 5493 generated) and in ssl_parse_client_hello (max. client 5494 version was not properly set), thanks to Didier Rebeix 5495 * Fixed another bug in ssl_parse_client_hello: clients with 5496 cipherlists larger than 96 bytes were incorrectly rejected 5497 * Fixed a couple memory leak in x509_read.c 5498 5499= Version 0.3 released on 2007-01-01 5500 5501 * Added server-side SSLv3 and TLSv1.0 support 5502 * Multiple fixes to enhance the compatibility with g++, 5503 thanks to Xosé Antón Otero Ferreira 5504 * Fixed a bug in the CBC code, thanks to dowst; also, 5505 the bignum code is no longer dependent on long long 5506 * Updated rsa_pkcs1_sign to handle arbitrary large inputs 5507 * Updated timing.c for improved compatibility with i386 5508 and 486 processors, thanks to Arnaud Cornet 5509 5510= Version 0.2 released on 2006-12-01 5511 5512 * Updated timing.c to support ARM and MIPS arch 5513 * Updated the MPI code to support 8086 on MSVC 1.5 5514 * Added the copyright notice at the top of havege.h 5515 * Fixed a bug in sha2_hmac, thanks to newsoft/Wenfang Zhang 5516 * Fixed a bug reported by Adrian Rüegsegger in x509_read_key 5517 * Fixed a bug reported by Torsten Lauter in ssl_read_record 5518 * Fixed a bug in rsa_check_privkey that would wrongly cause 5519 valid RSA keys to be dismissed (thanks to oldwolf) 5520 * Fixed a bug in mpi_is_prime that caused some primes to fail 5521 the Miller-Rabin primality test 5522 5523 I'd also like to thank Younès Hafri for the CRUX linux port, 5524 Khalil Petit who added XySSL into pkgsrc and Arnaud Cornet 5525 who maintains the Debian package :-) 5526 5527= Version 0.1 released on 2006-11-01 5528
