1 /*
2  * Copyright (c) 2001-2019, Arm Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 #ifndef MBEDTLS_CONFIG_H
7 #define MBEDTLS_CONFIG_H
8 
9 #if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE)
10 #define _CRT_SECURE_NO_DEPRECATE 1
11 #endif
12 
13 /**
14  * \name SECTION: System support
15  *
16  * This section sets system specific settings.
17  * \{
18  */
19 
20 /**
21  * \def MBEDTLS_HAVE_ASM
22  *
23  * The compiler has support for asm().
24  *
25  * Requires support for asm() in compiler.
26  *
27  * Used in:
28  *      library/aria.c
29  *      library/timing.c
30  *      include/mbedtls/bn_mul.h
31  *
32  * Required by:
33  *      MBEDTLS_AESNI_C
34  *      MBEDTLS_PADLOCK_C
35  *
36  * Comment to disable the use of assembly code.
37  */
38 #define MBEDTLS_HAVE_ASM
39 
40 /**
41  * \def MBEDTLS_NO_UDBL_DIVISION
42  *
43  * The platform lacks support for double-width integer division (64-bit
44  * division on a 32-bit platform, 128-bit division on a 64-bit platform).
45  *
46  * Used in:
47  *      include/mbedtls/bignum.h
48  *      library/bignum.c
49  *
50  * The bignum code uses double-width division to speed up some operations.
51  * Double-width division is often implemented in software that needs to
52  * be linked with the program. The presence of a double-width integer
53  * type is usually detected automatically through preprocessor macros,
54  * but the automatic detection cannot know whether the code needs to
55  * and can be linked with an implementation of division for that type.
56  * By default division is assumed to be usable if the type is present.
57  * Uncomment this option to prevent the use of double-width division.
58  *
59  * Note that division for the native integer type is always required.
60  * Furthermore, a 64-bit type is always required even on a 32-bit
61  * platform, but it need not support multiplication or division. In some
62  * cases it is also desirable to disable some double-width operations. For
63  * example, if double-width division is implemented in software, disabling
64  * it can reduce code size in some embedded targets.
65  */
66 //#define MBEDTLS_NO_UDBL_DIVISION
67 
68 /**
69  * \def MBEDTLS_NO_64BIT_MULTIPLICATION
70  *
71  * The platform lacks support for 32x32 -> 64-bit multiplication.
72  *
73  * Used in:
74  *      library/poly1305.c
75  *
76  * Some parts of the library may use multiplication of two unsigned 32-bit
77  * operands with a 64-bit result in order to speed up computations. On some
78  * platforms, this is not available in hardware and has to be implemented in
79  * software, usually in a library provided by the toolchain.
80  *
81  * Sometimes it is not desirable to have to link to that library. This option
82  * removes the dependency of that library on platforms that lack a hardware
83  * 64-bit multiplier by embedding a software implementation in Mbed TLS.
84  *
85  * Note that depending on the compiler, this may decrease performance compared
86  * to using the library function provided by the toolchain.
87  */
88 //#define MBEDTLS_NO_64BIT_MULTIPLICATION
89 
90 /**
91  * \def MBEDTLS_HAVE_SSE2
92  *
93  * CPU supports SSE2 instruction set.
94  *
95  * Uncomment if the CPU supports SSE2 (IA-32 specific).
96  */
97 //#define MBEDTLS_HAVE_SSE2
98 
99 /**
100  * \def MBEDTLS_HAVE_TIME
101  *
102  * System has time.h and time().
103  * The time does not need to be correct, only time differences are used,
104  * by contrast with MBEDTLS_HAVE_TIME_DATE
105  *
106  * Defining MBEDTLS_HAVE_TIME allows you to specify MBEDTLS_PLATFORM_TIME_ALT,
107  * MBEDTLS_PLATFORM_TIME_MACRO, MBEDTLS_PLATFORM_TIME_TYPE_MACRO and
108  * MBEDTLS_PLATFORM_STD_TIME.
109  *
110  * Comment if your system does not support time functions
111  */
112 #define MBEDTLS_HAVE_TIME
113 
114 /**
115  * \def MBEDTLS_HAVE_TIME_DATE
116  *
117  * System has time.h, time(), and an implementation for
118  * mbedtls_platform_gmtime_r() (see below).
119  * The time needs to be correct (not necesarily very accurate, but at least
120  * the date should be correct). This is used to verify the validity period of
121  * X.509 certificates.
122  *
123  * Comment if your system does not have a correct clock.
124  *
125  * \note mbedtls_platform_gmtime_r() is an abstraction in platform_util.h that
126  * behaves similarly to the gmtime_r() function from the C standard. Refer to
127  * the documentation for mbedtls_platform_gmtime_r() for more information.
128  *
129  * \note It is possible to configure an implementation for
130  * mbedtls_platform_gmtime_r() at compile-time by using the macro
131  * MBEDTLS_PLATFORM_GMTIME_R_ALT.
132  */
133 #define MBEDTLS_HAVE_TIME_DATE
134 
135 /**
136  * \def MBEDTLS_PLATFORM_MEMORY
137  *
138  * Enable the memory allocation layer.
139  *
140  * By default mbed TLS uses the system-provided calloc() and free().
141  * This allows different allocators (self-implemented or provided) to be
142  * provided to the platform abstraction layer.
143  *
144  * Enabling MBEDTLS_PLATFORM_MEMORY without the
145  * MBEDTLS_PLATFORM_{FREE,CALLOC}_MACROs will provide
146  * "mbedtls_platform_set_calloc_free()" allowing you to set an alternative calloc() and
147  * free() function pointer at runtime.
148  *
149  * Enabling MBEDTLS_PLATFORM_MEMORY and specifying
150  * MBEDTLS_PLATFORM_{CALLOC,FREE}_MACROs will allow you to specify the
151  * alternate function at compile time.
152  *
153  * Requires: MBEDTLS_PLATFORM_C
154  *
155  * Enable this layer to allow use of alternative memory allocators.
156  */
157 #define MBEDTLS_PLATFORM_MEMORY
158 
159 /**
160  * \def MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
161  *
162  * Do not assign standard functions in the platform layer (e.g. calloc() to
163  * MBEDTLS_PLATFORM_STD_CALLOC and printf() to MBEDTLS_PLATFORM_STD_PRINTF)
164  *
165  * This makes sure there are no linking errors on platforms that do not support
166  * these functions. You will HAVE to provide alternatives, either at runtime
167  * via the platform_set_xxx() functions or at compile time by setting
168  * the MBEDTLS_PLATFORM_STD_XXX defines, or enabling a
169  * MBEDTLS_PLATFORM_XXX_MACRO.
170  *
171  * Requires: MBEDTLS_PLATFORM_C
172  *
173  * Uncomment to prevent default assignment of standard functions in the
174  * platform layer.
175  */
176 //#define MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
177 
178 /**
179  * \def MBEDTLS_PLATFORM_EXIT_ALT
180  *
181  * MBEDTLS_PLATFORM_XXX_ALT: Uncomment a macro to let mbed TLS support the
182  * function in the platform abstraction layer.
183  *
184  * Example: In case you uncomment MBEDTLS_PLATFORM_PRINTF_ALT, mbed TLS will
185  * provide a function "mbedtls_platform_set_printf()" that allows you to set an
186  * alternative printf function pointer.
187  *
188  * All these define require MBEDTLS_PLATFORM_C to be defined!
189  *
190  * \note MBEDTLS_PLATFORM_SNPRINTF_ALT is required on Windows;
191  * it will be enabled automatically by check_config.h
192  *
193  * \warning MBEDTLS_PLATFORM_XXX_ALT cannot be defined at the same time as
194  * MBEDTLS_PLATFORM_XXX_MACRO!
195  *
196  * Requires: MBEDTLS_PLATFORM_TIME_ALT requires MBEDTLS_HAVE_TIME
197  *
198  * Uncomment a macro to enable alternate implementation of specific base
199  * platform function
200  */
201 //#define MBEDTLS_PLATFORM_EXIT_ALT
202 //#define MBEDTLS_PLATFORM_TIME_ALT
203 //#define MBEDTLS_PLATFORM_FPRINTF_ALT
204 //#define MBEDTLS_PLATFORM_PRINTF_ALT
205 //#define MBEDTLS_PLATFORM_SNPRINTF_ALT
206 //#define MBEDTLS_PLATFORM_NV_SEED_ALT
207 //#define MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT
208 
209 /**
210  * \def MBEDTLS_DEPRECATED_WARNING
211  *
212  * Mark deprecated functions so that they generate a warning if used.
213  * Functions deprecated in one version will usually be removed in the next
214  * version. You can enable this to help you prepare the transition to a new
215  * major version by making sure your code is not using these functions.
216  *
217  * This only works with GCC and Clang. With other compilers, you may want to
218  * use MBEDTLS_DEPRECATED_REMOVED
219  *
220  * Uncomment to get warnings on using deprecated functions.
221  */
222 //#define MBEDTLS_DEPRECATED_WARNING
223 
224 /**
225  * \def MBEDTLS_DEPRECATED_REMOVED
226  *
227  * Remove deprecated functions so that they generate an error if used.
228  * Functions deprecated in one version will usually be removed in the next
229  * version. You can enable this to help you prepare the transition to a new
230  * major version by making sure your code is not using these functions.
231  *
232  * Uncomment to get errors on using deprecated functions.
233  */
234 //#define MBEDTLS_DEPRECATED_REMOVED
235 
236 /**
237  * \def MBEDTLS_CHECK_PARAMS
238  *
239  * This configuration option controls whether the library validates more of
240  * the parameters passed to it.
241  *
242  * When this flag is not defined, the library only attempts to validate an
243  * input parameter if: (1) they may come from the outside world (such as the
244  * network, the filesystem, etc.) or (2) not validating them could result in
245  * internal memory errors such as overflowing a buffer controlled by the
246  * library. On the other hand, it doesn't attempt to validate parameters whose
247  * values are fully controlled by the application (such as pointers).
248  *
249  * When this flag is defined, the library additionally attempts to validate
250  * parameters that are fully controlled by the application, and should always
251  * be valid if the application code is fully correct and trusted.
252  *
253  * For example, when a function accepts as input a pointer to a buffer that may
254  * contain untrusted data, and its documentation mentions that this pointer
255  * must not be NULL:
256  * - the pointer is checked to be non-NULL only if this option is enabled
257  * - the content of the buffer is always validated
258  *
259  * When this flag is defined, if a library function receives a parameter that
260  * is invalid, it will:
261  * - invoke the macro MBEDTLS_PARAM_FAILED() which by default expands to a
262  *   call to the function mbedtls_param_failed()
263  * - immediately return (with a specific error code unless the function
264  *   returns void and can't communicate an error).
265  *
266  * When defining this flag, you also need to:
267  * - either provide a definition of the function mbedtls_param_failed() in
268  *   your application (see platform_util.h for its prototype) as the library
269  *   calls that function, but does not provide a default definition for it,
270  * - or provide a different definition of the macro MBEDTLS_PARAM_FAILED()
271  *   below if the above mechanism is not flexible enough to suit your needs.
272  *   See the documentation of this macro later in this file.
273  *
274  * Uncomment to enable validation of application-controlled parameters.
275  */
276 //#define MBEDTLS_CHECK_PARAMS
277 
278 /* \} name SECTION: System support */
279 
280 /**
281  * \name SECTION: mbed TLS feature support
282  *
283  * This section sets support for features that are or are not needed
284  * within the modules that are enabled.
285  * \{
286  */
287 
288 /**
289  * \def MBEDTLS_TIMING_ALT
290  *
291  * Uncomment to provide your own alternate implementation for mbedtls_timing_hardclock(),
292  * mbedtls_timing_get_timer(), mbedtls_set_alarm(), mbedtls_set/get_delay()
293  *
294  * Only works if you have MBEDTLS_TIMING_C enabled.
295  *
296  * You will need to provide a header "timing_alt.h" and an implementation at
297  * compile time.
298  */
299 //#define MBEDTLS_TIMING_ALT
300 
301 /**
302  * \def MBEDTLS_AES_ALT
303  *
304  * MBEDTLS__MODULE_NAME__ALT: Uncomment a macro to let mbed TLS use your
305  * alternate core implementation of a symmetric crypto, an arithmetic or hash
306  * module (e.g. platform specific assembly optimized implementations). Keep
307  * in mind that the function prototypes should remain the same.
308  *
309  * This replaces the whole module. If you only want to replace one of the
310  * functions, use one of the MBEDTLS__FUNCTION_NAME__ALT flags.
311  *
312  * Example: In case you uncomment MBEDTLS_AES_ALT, mbed TLS will no longer
313  * provide the "struct mbedtls_aes_context" definition and omit the base function
314  * declarations and implementations. "aes_alt.h" will be included from
315  * "aes.h" to include the new function definitions.
316  *
317  * Uncomment a macro to enable alternate implementation of the corresponding
318  * module.
319  *
320  * \warning   MD2, MD4, MD5, ARC4, DES and SHA-1 are considered weak and their
321  *            use constitutes a security risk. If possible, we recommend
322  *            avoiding dependencies on them, and considering stronger message
323  *            digests and ciphers instead.
324  *
325  */
326 #define MBEDTLS_AES_ALT
327 //#define MBEDTLS_ARC4_ALT
328 //#define MBEDTLS_ARIA_ALT
329 //#define MBEDTLS_BLOWFISH_ALT
330 //#define MBEDTLS_CAMELLIA_ALT
331 #define MBEDTLS_CCM_ALT
332 #define MBEDTLS_GCM_ALT
333 #define MBEDTLS_CHACHA20_ALT
334 #define MBEDTLS_CHACHAPOLY_ALT
335 #define MBEDTLS_CMAC_ALT
336 //#define MBEDTLS_DES_ALT
337 //#define MBEDTLS_ECJPAKE_ALT
338 //#define MBEDTLS_XTEA_ALT
339 //#define MBEDTLS_NIST_KW_ALT
340 //#define MBEDTLS_MD2_ALT
341 //#define MBEDTLS_MD4_ALT
342 //#define MBEDTLS_MD5_ALT
343 #define MBEDTLS_POLY1305_ALT
344 //#define MBEDTLS_RIPEMD160_ALT
345 //#define MBEDTLS_RIPEMD160_ALT
346 #define MBEDTLS_SHA1_ALT
347 #define MBEDTLS_SHA256_ALT
348 //#define MBEDTLS_SHA512_ALT
349 #define MBEDTLS_RSA_ALT
350 #define MBEDTLS_DHM_ALT
351 //#define MBEDTLS_XTEA_ALT
352 
353 /*
354  * When replacing the elliptic curve module, pleace consider, that it is
355  * implemented with two .c files:
356  *      - ecp.c
357  *      - ecp_curves.c
358  * You can replace them very much like all the other MBEDTLS__MODULE_NAME__ALT
359  * macros as described above. The only difference is that you have to make sure
360  * that you provide functionality for both .c files.
361  */
362 //#define MBEDTLS_ECP_ALT
363 
364 
365 /**
366  * \def MBEDTLS_MD2_PROCESS_ALT
367  *
368  * MBEDTLS__FUNCTION_NAME__ALT: Uncomment a macro to let mbed TLS use you
369  * alternate core implementation of symmetric crypto or hash function. Keep in
370  * mind that function prototypes should remain the same.
371  *
372  * This replaces only one function. The header file from mbed TLS is still
373  * used, in contrast to the MBEDTLS__MODULE_NAME__ALT flags.
374  *
375  * Example: In case you uncomment MBEDTLS_SHA256_PROCESS_ALT, mbed TLS will
376  * no longer provide the mbedtls_sha1_process() function, but it will still provide
377  * the other function (using your mbedtls_sha1_process() function) and the definition
378  * of mbedtls_sha1_context, so your implementation of mbedtls_sha1_process must be compatible
379  * with this definition.
380  *
381  * \note Because of a signature change, the core AES encryption and decryption routines are
382  *       currently named mbedtls_aes_internal_encrypt and mbedtls_aes_internal_decrypt,
383  *       respectively. When setting up alternative implementations, these functions should
384  *       be overriden, but the wrapper functions mbedtls_aes_decrypt and mbedtls_aes_encrypt
385  *       must stay untouched.
386  *
387  * \note If you use the AES_xxx_ALT macros, then is is recommended to also set
388  *       MBEDTLS_AES_ROM_TABLES in order to help the linker garbage-collect the AES
389  *       tables.
390  *
391  * Uncomment a macro to enable alternate implementation of the corresponding
392  * function.
393  *
394  * \warning   MD2, MD4, MD5, DES and SHA-1 are considered weak and their use
395  *            constitutes a security risk. If possible, we recommend avoiding
396  *            dependencies on them, and considering stronger message digests
397  *            and ciphers instead.
398  *
399  */
400 //#define MBEDTLS_MD2_PROCESS_ALT
401 //#define MBEDTLS_MD4_PROCESS_ALT
402 //#define MBEDTLS_MD5_PROCESS_ALT
403 //#define MBEDTLS_RIPEMD160_PROCESS_ALT
404 //#define MBEDTLS_SHA1_PROCESS_ALT
405 //#define MBEDTLS_SHA256_PROCESS_ALT
406 //#define MBEDTLS_SHA512_PROCESS_ALT
407 //#define MBEDTLS_DES_SETKEY_ALT
408 //#define MBEDTLS_DES_CRYPT_ECB_ALT
409 //#define MBEDTLS_DES3_CRYPT_ECB_ALT
410 //#define MBEDTLS_AES_SETKEY_ENC_ALT
411 //#define MBEDTLS_AES_SETKEY_DEC_ALT
412 //#define MBEDTLS_AES_ENCRYPT_ALT
413 //#define MBEDTLS_AES_DECRYPT_ALT
414 #define MBEDTLS_ECDH_GEN_PUBLIC_ALT
415 #define MBEDTLS_ECDH_COMPUTE_SHARED_ALT
416 #define MBEDTLS_ECDSA_VERIFY_ALT
417 #define MBEDTLS_ECDSA_SIGN_ALT
418 #define MBEDTLS_ECDSA_GENKEY_ALT
419 /**
420  * \def MBEDTLS_ECP_INTERNAL_ALT
421  *
422  * Expose a part of the internal interface of the Elliptic Curve Point module.
423  *
424  * MBEDTLS_ECP__FUNCTION_NAME__ALT: Uncomment a macro to let mbed TLS use your
425  * alternative core implementation of elliptic curve arithmetic. Keep in mind
426  * that function prototypes should remain the same.
427  *
428  * This partially replaces one function. The header file from mbed TLS is still
429  * used, in contrast to the MBEDTLS_ECP_ALT flag. The original implementation
430  * is still present and it is used for group structures not supported by the
431  * alternative.
432  *
433  * Any of these options become available by defining MBEDTLS_ECP_INTERNAL_ALT
434  * and implementing the following functions:
435  *      unsigned char mbedtls_internal_ecp_grp_capable(
436  *          const mbedtls_ecp_group *grp )
437  *      int  mbedtls_internal_ecp_init( const mbedtls_ecp_group *grp )
438  *      void mbedtls_internal_ecp_free( const mbedtls_ecp_group *grp )
439  * The mbedtls_internal_ecp_grp_capable function should return 1 if the
440  * replacement functions implement arithmetic for the given group and 0
441  * otherwise.
442  * The functions mbedtls_internal_ecp_init and mbedtls_internal_ecp_free are
443  * called before and after each point operation and provide an opportunity to
444  * implement optimized set up and tear down instructions.
445  *
446  * Example: In case you uncomment MBEDTLS_ECP_INTERNAL_ALT and
447  * MBEDTLS_ECP_DOUBLE_JAC_ALT, mbed TLS will still provide the ecp_double_jac
448  * function, but will use your mbedtls_internal_ecp_double_jac if the group is
449  * supported (your mbedtls_internal_ecp_grp_capable function returns 1 when
450  * receives it as an argument). If the group is not supported then the original
451  * implementation is used. The other functions and the definition of
452  * mbedtls_ecp_group and mbedtls_ecp_point will not change, so your
453  * implementation of mbedtls_internal_ecp_double_jac and
454  * mbedtls_internal_ecp_grp_capable must be compatible with this definition.
455  *
456  * Uncomment a macro to enable alternate implementation of the corresponding
457  * function.
458  */
459 /* Required for all the functions in this section */
460 //#define MBEDTLS_ECP_INTERNAL_ALT
461 /* Support for Weierstrass curves with Jacobi representation */
462 //#define MBEDTLS_ECP_RANDOMIZE_JAC_ALT
463 //#define MBEDTLS_ECP_ADD_MIXED_ALT
464 //#define MBEDTLS_ECP_DOUBLE_JAC_ALT
465 //#define MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT
466 //#define MBEDTLS_ECP_NORMALIZE_JAC_ALT
467 /* Support for curves with Montgomery arithmetic */
468 //#define MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT
469 //#define MBEDTLS_ECP_RANDOMIZE_MXZ_ALT
470 //#define MBEDTLS_ECP_NORMALIZE_MXZ_ALT
471 
472 /**
473  * \def MBEDTLS_TEST_NULL_ENTROPY
474  *
475  * Enables testing and use of mbed TLS without any configured entropy sources.
476  * This permits use of the library on platforms before an entropy source has
477  * been integrated (see for example the MBEDTLS_ENTROPY_HARDWARE_ALT or the
478  * MBEDTLS_ENTROPY_NV_SEED switches).
479  *
480  * WARNING! This switch MUST be disabled in production builds, and is suitable
481  * only for development.
482  * Enabling the switch negates any security provided by the library.
483  *
484  * Requires MBEDTLS_ENTROPY_C, MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
485  *
486  */
487 //#define MBEDTLS_TEST_NULL_ENTROPY
488 
489 /**
490  * \def MBEDTLS_ENTROPY_HARDWARE_ALT
491  *
492  * Uncomment this macro to let mbed TLS use your own implementation of a
493  * hardware entropy collector.
494  *
495  * Your function must be called \c mbedtls_hardware_poll(), have the same
496  * prototype as declared in entropy_poll.h, and accept NULL as first argument.
497  *
498  * Uncomment to use your own hardware entropy collector.
499  */
500 #define MBEDTLS_ENTROPY_HARDWARE_ALT
501 
502 /**
503  * \def MBEDTLS_AES_ROM_TABLES
504  *
505  * Use precomputed AES tables stored in ROM.
506  *
507  * Uncomment this macro to use precomputed AES tables stored in ROM.
508  * Comment this macro to generate AES tables in RAM at runtime.
509  *
510  * Tradeoff: Using precomputed ROM tables reduces RAM usage by ~8kb
511  * (or ~2kb if \c MBEDTLS_AES_FEWER_TABLES is used) and reduces the
512  * initialization time before the first AES operation can be performed.
513  * It comes at the cost of additional ~8kb ROM use (resp. ~2kb if \c
514  * MBEDTLS_AES_FEWER_TABLES below is used), and potentially degraded
515  * performance if ROM access is slower than RAM access.
516  *
517  * This option is independent of \c MBEDTLS_AES_FEWER_TABLES.
518  *
519  */
520 //#define MBEDTLS_AES_ROM_TABLES
521 
522 /**
523  * \def MBEDTLS_AES_FEWER_TABLES
524  *
525  * Use less ROM/RAM for AES tables.
526  *
527  * Uncommenting this macro omits 75% of the AES tables from
528  * ROM / RAM (depending on the value of \c MBEDTLS_AES_ROM_TABLES)
529  * by computing their values on the fly during operations
530  * (the tables are entry-wise rotations of one another).
531  *
532  * Tradeoff: Uncommenting this reduces the RAM / ROM footprint
533  * by ~6kb but at the cost of more arithmetic operations during
534  * runtime. Specifically, one has to compare 4 accesses within
535  * different tables to 4 accesses with additional arithmetic
536  * operations within the same table. The performance gain/loss
537  * depends on the system and memory details.
538  *
539  * This option is independent of \c MBEDTLS_AES_ROM_TABLES.
540  *
541  */
542 //#define MBEDTLS_AES_FEWER_TABLES
543 
544 /**
545  * \def MBEDTLS_CAMELLIA_SMALL_MEMORY
546  *
547  * Use less ROM for the Camellia implementation (saves about 768 bytes).
548  *
549  * Uncomment this macro to use less memory for Camellia.
550  */
551 //#define MBEDTLS_CAMELLIA_SMALL_MEMORY
552 
553 /**
554  * \def MBEDTLS_CIPHER_MODE_CBC
555  *
556  * Enable Cipher Block Chaining mode (CBC) for symmetric ciphers.
557  */
558 #define MBEDTLS_CIPHER_MODE_CBC
559 
560 /**
561  * \def MBEDTLS_CIPHER_MODE_CFB
562  *
563  * Enable Cipher Feedback mode (CFB) for symmetric ciphers.
564  */
565 //#define MBEDTLS_CIPHER_MODE_CFB
566 
567 /**
568  * \def MBEDTLS_CIPHER_MODE_CTR
569  *
570  * Enable Counter Block Cipher mode (CTR) for symmetric ciphers.
571  */
572 #define MBEDTLS_CIPHER_MODE_CTR
573 
574 /**
575  * \def MBEDTLS_CIPHER_MODE_OFB
576  *
577  * Enable Output Feedback mode (OFB) for symmetric ciphers.
578  */
579 #define MBEDTLS_CIPHER_MODE_OFB
580 
581 /**
582  * \def MBEDTLS_CIPHER_MODE_XTS
583  *
584  * Enable Xor-encrypt-xor with ciphertext stealing mode (XTS) for AES.
585  */
586 //#define MBEDTLS_CIPHER_MODE_XTS
587 
588 /**
589  * \def MBEDTLS_CIPHER_NULL_CIPHER
590  *
591  * Enable NULL cipher.
592  * Warning: Only do so when you know what you are doing. This allows for
593  * encryption or channels without any security!
594  *
595  * Requires MBEDTLS_ENABLE_WEAK_CIPHERSUITES as well to enable
596  * the following ciphersuites:
597  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_NULL_SHA
598  *      MBEDTLS_TLS_ECDH_RSA_WITH_NULL_SHA
599  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_NULL_SHA
600  *      MBEDTLS_TLS_ECDHE_RSA_WITH_NULL_SHA
601  *      MBEDTLS_TLS_ECDHE_PSK_WITH_NULL_SHA384
602  *      MBEDTLS_TLS_ECDHE_PSK_WITH_NULL_SHA256
603  *      MBEDTLS_TLS_ECDHE_PSK_WITH_NULL_SHA
604  *      MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA384
605  *      MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA256
606  *      MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA
607  *      MBEDTLS_TLS_RSA_WITH_NULL_SHA256
608  *      MBEDTLS_TLS_RSA_WITH_NULL_SHA
609  *      MBEDTLS_TLS_RSA_WITH_NULL_MD5
610  *      MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA384
611  *      MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA256
612  *      MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA
613  *      MBEDTLS_TLS_PSK_WITH_NULL_SHA384
614  *      MBEDTLS_TLS_PSK_WITH_NULL_SHA256
615  *      MBEDTLS_TLS_PSK_WITH_NULL_SHA
616  *
617  * Uncomment this macro to enable the NULL cipher and ciphersuites
618  */
619 //#define MBEDTLS_CIPHER_NULL_CIPHER
620 
621 /**
622  * \def MBEDTLS_CIPHER_PADDING_PKCS7
623  *
624  * MBEDTLS_CIPHER_PADDING_XXX: Uncomment or comment macros to add support for
625  * specific padding modes in the cipher layer with cipher modes that support
626  * padding (e.g. CBC)
627  *
628  * If you disable all padding modes, only full blocks can be used with CBC.
629  *
630  * Enable padding modes in the cipher layer.
631  */
632 //#define MBEDTLS_CIPHER_PADDING_PKCS7
633 //#define MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS
634 //#define MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN
635 //#define MBEDTLS_CIPHER_PADDING_ZEROS
636 
637 /**
638  * \def MBEDTLS_ENABLE_WEAK_CIPHERSUITES
639  *
640  * Enable weak ciphersuites in SSL / TLS.
641  * Warning: Only do so when you know what you are doing. This allows for
642  * channels with virtually no security at all!
643  *
644  * This enables the following ciphersuites:
645  *      MBEDTLS_TLS_RSA_WITH_DES_CBC_SHA
646  *      MBEDTLS_TLS_DHE_RSA_WITH_DES_CBC_SHA
647  *
648  * Uncomment this macro to enable weak ciphersuites
649  *
650  * \warning   DES is considered a weak cipher and its use constitutes a
651  *            security risk. We recommend considering stronger ciphers instead.
652  */
653 //#define MBEDTLS_ENABLE_WEAK_CIPHERSUITES
654 
655 /**
656  * \def MBEDTLS_REMOVE_ARC4_CIPHERSUITES
657  *
658  * Remove RC4 ciphersuites by default in SSL / TLS.
659  * This flag removes the ciphersuites based on RC4 from the default list as
660  * returned by mbedtls_ssl_list_ciphersuites(). However, it is still possible to
661  * enable (some of) them with mbedtls_ssl_conf_ciphersuites() by including them
662  * explicitly.
663  *
664  * Uncomment this macro to remove RC4 ciphersuites by default.
665  */
666 //#define MBEDTLS_REMOVE_ARC4_CIPHERSUITES
667 
668 /**
669  * \def MBEDTLS_ECP_DP_SECP192R1_ENABLED
670  *
671  * MBEDTLS_ECP_XXXX_ENABLED: Enables specific curves within the Elliptic Curve
672  * module.  By default all supported curves are enabled.
673  *
674  * Comment macros to disable the curve and functions for it
675  */
676 #define MBEDTLS_ECP_DP_SECP192R1_ENABLED
677 #define MBEDTLS_ECP_DP_SECP224R1_ENABLED
678 #define MBEDTLS_ECP_DP_SECP256R1_ENABLED
679 #define MBEDTLS_ECP_DP_SECP384R1_ENABLED
680 #define MBEDTLS_ECP_DP_SECP521R1_ENABLED
681 #define MBEDTLS_ECP_DP_SECP192K1_ENABLED
682 #define MBEDTLS_ECP_DP_SECP224K1_ENABLED
683 #define MBEDTLS_ECP_DP_SECP256K1_ENABLED
684 /* CryptoCell only supports BP256R1 at this stage */
685 #define MBEDTLS_ECP_DP_BP256R1_ENABLED
686 //#define MBEDTLS_ECP_DP_BP384R1_ENABLED
687 //#define MBEDTLS_ECP_DP_BP512R1_ENABLED
688 #define MBEDTLS_ECP_DP_CURVE25519_ENABLED
689 //#define MBEDTLS_ECP_DP_CURVE448_ENABLED
690 
691 /**
692  * \def MBEDTLS_ECP_NIST_OPTIM
693  *
694  * Enable specific 'modulo p' routines for each NIST prime.
695  * Depending on the prime and architecture, makes operations 4 to 8 times
696  * faster on the corresponding curve.
697  *
698  * Comment this macro to disable NIST curves optimisation.
699  */
700 #define MBEDTLS_ECP_NIST_OPTIM
701 
702 /**
703  * \def MBEDTLS_ECP_RESTARTABLE
704  *
705  * Enable "non-blocking" ECC operations that can return early and be resumed.
706  *
707  * This allows various functions to pause by returning
708  * #MBEDTLS_ERR_ECP_IN_PROGRESS (or, for functions in the SSL module,
709  * #MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) and then be called later again in
710  * order to further progress and eventually complete their operation. This is
711  * controlled through mbedtls_ecp_set_max_ops() which limits the maximum
712  * number of ECC operations a function may perform before pausing; see
713  * mbedtls_ecp_set_max_ops() for more information.
714  *
715  * This is useful in non-threaded environments if you want to avoid blocking
716  * for too long on ECC (and, hence, X.509 or SSL/TLS) operations.
717  *
718  * Uncomment this macro to enable restartable ECC computations.
719  *
720  * \note  This option only works with the default software implementation of
721  *        elliptic curve functionality. It is incompatible with
722  *        MBEDTLS_ECP_ALT, MBEDTLS_ECDH_XXX_ALT and MBEDTLS_ECDSA_XXX_ALT.
723  */
724 //#define MBEDTLS_ECP_RESTARTABLE
725 
726 /**
727  * \def MBEDTLS_ECDSA_DETERMINISTIC
728  *
729  * Enable deterministic ECDSA (RFC 6979).
730  * Standard ECDSA is "fragile" in the sense that lack of entropy when signing
731  * may result in a compromise of the long-term signing key. This is avoided by
732  * the deterministic variant.
733  *
734  * Requires: MBEDTLS_HMAC_DRBG_C
735  *
736  * Comment this macro to disable deterministic ECDSA.
737  */
738 #define MBEDTLS_ECDSA_DETERMINISTIC
739 
740 
741 /**
742  * \def MBEDTLS_KEY_EXCHANGE_PSK_ENABLED
743  *
744  * Enable the PSK based ciphersuite modes in SSL / TLS.
745  *
746  * This enables the following ciphersuites (if other requisites are
747  * enabled as well):
748  *      MBEDTLS_TLS_PSK_WITH_AES_256_GCM_SHA384
749  *      MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA384
750  *      MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA
751  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384
752  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384
753  *      MBEDTLS_TLS_PSK_WITH_AES_128_GCM_SHA256
754  *      MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA256
755  *      MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA
756  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256
757  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256
758  *      MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA
759  *      MBEDTLS_TLS_PSK_WITH_RC4_128_SHA
760  */
761 //#define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED
762 
763 /**
764  * \def MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED
765  *
766  * Enable the DHE-PSK based ciphersuite modes in SSL / TLS.
767  *
768  * Requires: MBEDTLS_DHM_C
769  *
770  * This enables the following ciphersuites (if other requisites are
771  * enabled as well):
772  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384
773  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384
774  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA
775  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384
776  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384
777  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256
778  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256
779  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA
780  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256
781  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
782  *      MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA
783  *      MBEDTLS_TLS_DHE_PSK_WITH_RC4_128_SHA
784  *
785  * \warning    Using DHE constitutes a security risk as it
786  *             is not possible to validate custom DH parameters.
787  *             If possible, it is recommended users should consider
788  *             preferring other methods of key exchange.
789  *             See dhm.h for more details.
790  *
791  */
792 //#define MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED
793 
794 /**
795  * \def MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED
796  *
797  * Enable the ECDHE-PSK based ciphersuite modes in SSL / TLS.
798  *
799  * Requires: MBEDTLS_ECDH_C
800  *
801  * This enables the following ciphersuites (if other requisites are
802  * enabled as well):
803  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384
804  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA
805  *      MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384
806  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256
807  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA
808  *      MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
809  *      MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA
810  *      MBEDTLS_TLS_ECDHE_PSK_WITH_RC4_128_SHA
811  */
812 //#define MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED
813 
814 /**
815  * \def MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED
816  *
817  * Enable the RSA-PSK based ciphersuite modes in SSL / TLS.
818  *
819  * Requires: MBEDTLS_RSA_C, MBEDTLS_PKCS1_V15,
820  *           MBEDTLS_X509_CRT_PARSE_C
821  *
822  * This enables the following ciphersuites (if other requisites are
823  * enabled as well):
824  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384
825  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384
826  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA
827  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384
828  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384
829  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256
830  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256
831  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA
832  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256
833  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256
834  *      MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA
835  *      MBEDTLS_TLS_RSA_PSK_WITH_RC4_128_SHA
836  */
837 //#define MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED
838 
839 /**
840  * \def MBEDTLS_KEY_EXCHANGE_RSA_ENABLED
841  *
842  * Enable the RSA-only based ciphersuite modes in SSL / TLS.
843  *
844  * Requires: MBEDTLS_RSA_C, MBEDTLS_PKCS1_V15,
845  *           MBEDTLS_X509_CRT_PARSE_C
846  *
847  * This enables the following ciphersuites (if other requisites are
848  * enabled as well):
849  *      MBEDTLS_TLS_RSA_WITH_AES_256_GCM_SHA384
850  *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA256
851  *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA
852  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384
853  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
854  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
855  *      MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256
856  *      MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256
857  *      MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA
858  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256
859  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
860  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
861  *      MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA
862  *      MBEDTLS_TLS_RSA_WITH_RC4_128_SHA
863  *      MBEDTLS_TLS_RSA_WITH_RC4_128_MD5
864  */
865 //#define MBEDTLS_KEY_EXCHANGE_RSA_ENABLED
866 
867 /**
868  * \def MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED
869  *
870  * Enable the DHE-RSA based ciphersuite modes in SSL / TLS.
871  *
872  * Requires: MBEDTLS_DHM_C, MBEDTLS_RSA_C, MBEDTLS_PKCS1_V15,
873  *           MBEDTLS_X509_CRT_PARSE_C
874  *
875  * This enables the following ciphersuites (if other requisites are
876  * enabled as well):
877  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
878  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
879  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA
880  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384
881  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256
882  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
883  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
884  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
885  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA
886  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
887  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
888  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
889  *      MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
890  *
891  * \warning    Using DHE constitutes a security risk as it
892  *             is not possible to validate custom DH parameters.
893  *             If possible, it is recommended users should consider
894  *             preferring other methods of key exchange.
895  *             See dhm.h for more details.
896  *
897  */
898 //#define MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED
899 
900 /**
901  * \def MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
902  *
903  * Enable the ECDHE-RSA based ciphersuite modes in SSL / TLS.
904  *
905  * Requires: MBEDTLS_ECDH_C, MBEDTLS_RSA_C, MBEDTLS_PKCS1_V15,
906  *           MBEDTLS_X509_CRT_PARSE_C
907  *
908  * This enables the following ciphersuites (if other requisites are
909  * enabled as well):
910  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
911  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
912  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
913  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384
914  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384
915  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
916  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
917  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
918  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
919  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
920  *      MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
921  *      MBEDTLS_TLS_ECDHE_RSA_WITH_RC4_128_SHA
922  */
923 //#define MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
924 
925 /**
926  * \def MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
927  *
928  * Enable the ECDHE-ECDSA based ciphersuite modes in SSL / TLS.
929  *
930  * Requires: MBEDTLS_ECDH_C, MBEDTLS_ECDSA_C, MBEDTLS_X509_CRT_PARSE_C,
931  *
932  * This enables the following ciphersuites (if other requisites are
933  * enabled as well):
934  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
935  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
936  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
937  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384
938  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384
939  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
940  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
941  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
942  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
943  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
944  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
945  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
946  */
947 //#define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
948 
949 /**
950  * \def MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED
951  *
952  * Enable the ECDH-ECDSA based ciphersuite modes in SSL / TLS.
953  *
954  * Requires: MBEDTLS_ECDH_C, MBEDTLS_X509_CRT_PARSE_C
955  *
956  * This enables the following ciphersuites (if other requisites are
957  * enabled as well):
958  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_RC4_128_SHA
959  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
960  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
961  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
962  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
963  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
964  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
965  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
966  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
967  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384
968  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
969  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384
970  */
971 //#define MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED
972 
973 /**
974  * \def MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED
975  *
976  * Enable the ECDH-RSA based ciphersuite modes in SSL / TLS.
977  *
978  * Requires: MBEDTLS_ECDH_C, MBEDTLS_X509_CRT_PARSE_C
979  *
980  * This enables the following ciphersuites (if other requisites are
981  * enabled as well):
982  *      MBEDTLS_TLS_ECDH_RSA_WITH_RC4_128_SHA
983  *      MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
984  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
985  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
986  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
987  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
988  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
989  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
990  *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256
991  *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384
992  *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256
993  *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384
994  */
995 //#define MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED
996 
997 /**
998  * \def MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED
999  *
1000  * Enable the ECJPAKE based ciphersuite modes in SSL / TLS.
1001  *
1002  * \warning This is currently experimental. EC J-PAKE support is based on the
1003  * Thread v1.0.0 specification; incompatible changes to the specification
1004  * might still happen. For this reason, this is disabled by default.
1005  *
1006  * Requires: MBEDTLS_ECJPAKE_C
1007  *           MBEDTLS_SHA256_C
1008  *           MBEDTLS_ECP_DP_SECP256R1_ENABLED
1009  *
1010  * This enables the following ciphersuites (if other requisites are
1011  * enabled as well):
1012  *      MBEDTLS_TLS_ECJPAKE_WITH_AES_128_CCM_8
1013  */
1014 //#define MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED
1015 
1016 /**
1017  * \def MBEDTLS_PK_PARSE_EC_EXTENDED
1018  *
1019  * Enhance support for reading EC keys using variants of SEC1 not allowed by
1020  * RFC 5915 and RFC 5480.
1021  *
1022  * Currently this means parsing the SpecifiedECDomain choice of EC
1023  * parameters (only known groups are supported, not arbitrary domains, to
1024  * avoid validation issues).
1025  *
1026  * Disable if you only need to support RFC 5915 + 5480 key formats.
1027  */
1028 //#define MBEDTLS_PK_PARSE_EC_EXTENDED
1029 
1030 /**
1031  * \def MBEDTLS_ERROR_STRERROR_DUMMY
1032  *
1033  * Enable a dummy error function to make use of mbedtls_strerror() in
1034  * third party libraries easier when MBEDTLS_ERROR_C is disabled
1035  * (no effect when MBEDTLS_ERROR_C is enabled).
1036  *
1037  * You can safely disable this if MBEDTLS_ERROR_C is enabled, or if you're
1038  * not using mbedtls_strerror() or error_strerror() in your application.
1039  *
1040  * Disable if you run into name conflicts and want to really remove the
1041  * mbedtls_strerror()
1042  */
1043 #define MBEDTLS_ERROR_STRERROR_DUMMY
1044 
1045 /**
1046  * \def MBEDTLS_GENPRIME
1047  *
1048  * Enable the prime-number generation code.
1049  *
1050  * Requires: MBEDTLS_BIGNUM_C
1051  */
1052 #define MBEDTLS_GENPRIME
1053 
1054 /**
1055  * \def MBEDTLS_FS_IO
1056  *
1057  * Enable functions that use the filesystem.
1058  */
1059 //#define MBEDTLS_FS_IO
1060 
1061 /**
1062  * \def MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
1063  *
1064  * Do not add default entropy sources. These are the platform specific,
1065  * mbedtls_timing_hardclock and HAVEGE based poll functions.
1066  *
1067  * This is useful to have more control over the added entropy sources in an
1068  * application.
1069  *
1070  * Uncomment this macro to prevent loading of default entropy functions.
1071  */
1072 //#define MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
1073 
1074 /**
1075  * \def MBEDTLS_NO_PLATFORM_ENTROPY
1076  *
1077  * Do not use built-in platform entropy functions.
1078  * This is useful if your platform does not support
1079  * standards like the /dev/urandom or Windows CryptoAPI.
1080  *
1081  * Uncomment this macro to disable the built-in platform entropy functions.
1082  */
1083 #define MBEDTLS_NO_PLATFORM_ENTROPY
1084 
1085 /**
1086  * \def MBEDTLS_ENTROPY_FORCE_SHA256
1087  *
1088  * Force the entropy accumulator to use a SHA-256 accumulator instead of the
1089  * default SHA-512 based one (if both are available).
1090  *
1091  * Requires: MBEDTLS_SHA256_C
1092  *
1093  * On 32-bit systems SHA-256 can be much faster than SHA-512. Use this option
1094  * if you have performance concerns.
1095  *
1096  * This option is only useful if both MBEDTLS_SHA256_C and
1097  * MBEDTLS_SHA512_C are defined. Otherwise the available hash module is used.
1098  */
1099 //#define MBEDTLS_ENTROPY_FORCE_SHA256
1100 
1101 /**
1102  * \def MBEDTLS_ENTROPY_NV_SEED
1103  *
1104  * Enable the non-volatile (NV) seed file-based entropy source.
1105  * (Also enables the NV seed read/write functions in the platform layer)
1106  *
1107  * This is crucial (if not required) on systems that do not have a
1108  * cryptographic entropy source (in hardware or kernel) available.
1109  *
1110  * Requires: MBEDTLS_ENTROPY_C, MBEDTLS_PLATFORM_C
1111  *
1112  * \note The read/write functions that are used by the entropy source are
1113  *       determined in the platform layer, and can be modified at runtime and/or
1114  *       compile-time depending on the flags (MBEDTLS_PLATFORM_NV_SEED_*) used.
1115  *
1116  * \note If you use the default implementation functions that read a seedfile
1117  *       with regular fopen(), please make sure you make a seedfile with the
1118  *       proper name (defined in MBEDTLS_PLATFORM_STD_NV_SEED_FILE) and at
1119  *       least MBEDTLS_ENTROPY_BLOCK_SIZE bytes in size that can be read from
1120  *       and written to or you will get an entropy source error! The default
1121  *       implementation will only use the first MBEDTLS_ENTROPY_BLOCK_SIZE
1122  *       bytes from the file.
1123  *
1124  * \note The entropy collector will write to the seed file before entropy is
1125  *       given to an external source, to update it.
1126  */
1127 //#define MBEDTLS_ENTROPY_NV_SEED
1128 
1129 /**
1130  * \def MBEDTLS_MEMORY_DEBUG
1131  *
1132  * Enable debugging of buffer allocator memory issues. Automatically prints
1133  * (to stderr) all (fatal) messages on memory allocation issues. Enables
1134  * function for 'debug output' of allocated memory.
1135  *
1136  * Requires: MBEDTLS_MEMORY_BUFFER_ALLOC_C
1137  *
1138  * Uncomment this macro to let the buffer allocator print out error messages.
1139  */
1140 //#define MBEDTLS_MEMORY_DEBUG
1141 
1142 /**
1143  * \def MBEDTLS_MEMORY_BACKTRACE
1144  *
1145  * Include backtrace information with each allocated block.
1146  *
1147  * Requires: MBEDTLS_MEMORY_BUFFER_ALLOC_C
1148  *           GLIBC-compatible backtrace() an backtrace_symbols() support
1149  *
1150  * Uncomment this macro to include backtrace information
1151  */
1152 //#define MBEDTLS_MEMORY_BACKTRACE
1153 
1154 /**
1155  * \def MBEDTLS_PK_RSA_ALT_SUPPORT
1156  *
1157  * Support external private RSA keys (eg from a HSM) in the PK layer.
1158  *
1159  * Comment this macro to disable support for external private RSA keys.
1160  */
1161 //#define MBEDTLS_PK_RSA_ALT_SUPPORT
1162 
1163 /**
1164  * \def MBEDTLS_PKCS1_V15
1165  *
1166  * Enable support for PKCS#1 v1.5 encoding.
1167  *
1168  * Requires: MBEDTLS_RSA_C
1169  *
1170  * This enables support for PKCS#1 v1.5 operations.
1171  */
1172 #define MBEDTLS_PKCS1_V15
1173 
1174 /**
1175  * \def MBEDTLS_PKCS1_V21
1176  *
1177  * Enable support for PKCS#1 v2.1 encoding.
1178  *
1179  * Requires: MBEDTLS_MD_C, MBEDTLS_RSA_C
1180  *
1181  * This enables support for RSAES-OAEP and RSASSA-PSS operations.
1182  */
1183 #define MBEDTLS_PKCS1_V21
1184 
1185 /**
1186  * \def MBEDTLS_RSA_NO_CRT
1187  *
1188  * Do not use the Chinese Remainder Theorem for the RSA private operation.
1189  *
1190  * Uncomment this macro to disable the use of CRT in RSA.
1191  *
1192  */
1193 //#define MBEDTLS_RSA_NO_CRT
1194 
1195 /**
1196  * \def MBEDTLS_SELF_TEST
1197  *
1198  * Enable the checkup functions (*_self_test).
1199  */
1200 #define MBEDTLS_SELF_TEST
1201 
1202 /**
1203  * \def MBEDTLS_SHA256_SMALLER
1204  *
1205  * Enable an implementation of SHA-256 that has lower ROM footprint but also
1206  * lower performance.
1207  *
1208  * The default implementation is meant to be a reasonnable compromise between
1209  * performance and size. This version optimizes more aggressively for size at
1210  * the expense of performance. Eg on Cortex-M4 it reduces the size of
1211  * mbedtls_sha256_process() from ~2KB to ~0.5KB for a performance hit of about
1212  * 30%.
1213  *
1214  * Uncomment to enable the smaller implementation of SHA256.
1215  */
1216 //#define MBEDTLS_SHA256_SMALLER
1217 
1218 /**
1219  * \def MBEDTLS_SSL_ALL_ALERT_MESSAGES
1220  *
1221  * Enable sending of alert messages in case of encountered errors as per RFC.
1222  * If you choose not to send the alert messages, mbed TLS can still communicate
1223  * with other servers, only debugging of failures is harder.
1224  *
1225  * The advantage of not sending alert messages, is that no information is given
1226  * about reasons for failures thus preventing adversaries of gaining intel.
1227  *
1228  * Enable sending of all alert messages
1229  */
1230 //#define MBEDTLS_SSL_ALL_ALERT_MESSAGES
1231 /**
1232  * \def MBEDTLS_SSL_ASYNC_PRIVATE
1233  *
1234  * Enable asynchronous external private key operations in SSL. This allows
1235  * you to configure an SSL connection to call an external cryptographic
1236  * module to perform private key operations instead of performing the
1237  * operation inside the library.
1238  *
1239  */
1240 //#define MBEDTLS_SSL_ASYNC_PRIVATE
1241 
1242 /**
1243  * \def MBEDTLS_SSL_DEBUG_ALL
1244  *
1245  * Enable the debug messages in SSL module for all issues.
1246  * Debug messages have been disabled in some places to prevent timing
1247  * attacks due to (unbalanced) debugging function calls.
1248  *
1249  * If you need all error reporting you should enable this during debugging,
1250  * but remove this for production servers that should log as well.
1251  *
1252  * Uncomment this macro to report all debug messages on errors introducing
1253  * a timing side-channel.
1254  *
1255  */
1256 //#define MBEDTLS_SSL_DEBUG_ALL
1257 
1258 /** \def MBEDTLS_SSL_ENCRYPT_THEN_MAC
1259  *
1260  * Enable support for Encrypt-then-MAC, RFC 7366.
1261  *
1262  * This allows peers that both support it to use a more robust protection for
1263  * ciphersuites using CBC, providing deep resistance against timing attacks
1264  * on the padding or underlying cipher.
1265  *
1266  * This only affects CBC ciphersuites, and is useless if none is defined.
1267  *
1268  * Requires: MBEDTLS_SSL_PROTO_TLS1    or
1269  *           MBEDTLS_SSL_PROTO_TLS1_1  or
1270  *           MBEDTLS_SSL_PROTO_TLS1_2
1271  *
1272  * Comment this macro to disable support for Encrypt-then-MAC
1273  */
1274 //#define MBEDTLS_SSL_ENCRYPT_THEN_MAC
1275 
1276 /** \def MBEDTLS_SSL_EXTENDED_MASTER_SECRET
1277  *
1278  * Enable support for Extended Master Secret, aka Session Hash
1279  * (draft-ietf-tls-session-hash-02).
1280  *
1281  * This was introduced as "the proper fix" to the Triple Handshake familiy of
1282  * attacks, but it is recommended to always use it (even if you disable
1283  * renegotiation), since it actually fixes a more fundamental issue in the
1284  * original SSL/TLS design, and has implications beyond Triple Handshake.
1285  *
1286  * Requires: MBEDTLS_SSL_PROTO_TLS1    or
1287  *           MBEDTLS_SSL_PROTO_TLS1_1  or
1288  *           MBEDTLS_SSL_PROTO_TLS1_2
1289  *
1290  * Comment this macro to disable support for Extended Master Secret.
1291  */
1292 //#define MBEDTLS_SSL_EXTENDED_MASTER_SECRET
1293 
1294 /**
1295  * \def MBEDTLS_SSL_FALLBACK_SCSV
1296  *
1297  * Enable support for FALLBACK_SCSV (draft-ietf-tls-downgrade-scsv-00).
1298  *
1299  * For servers, it is recommended to always enable this, unless you support
1300  * only one version of TLS, or know for sure that none of your clients
1301  * implements a fallback strategy.
1302  *
1303  * For clients, you only need this if you're using a fallback strategy, which
1304  * is not recommended in the first place, unless you absolutely need it to
1305  * interoperate with buggy (version-intolerant) servers.
1306  *
1307  * Comment this macro to disable support for FALLBACK_SCSV
1308  */
1309 //#define MBEDTLS_SSL_FALLBACK_SCSV
1310 
1311 /**
1312  * \def MBEDTLS_SSL_HW_RECORD_ACCEL
1313  *
1314  * Enable hooking functions in SSL module for hardware acceleration of
1315  * individual records.
1316  *
1317  * Uncomment this macro to enable hooking functions.
1318  */
1319 //#define MBEDTLS_SSL_HW_RECORD_ACCEL
1320 
1321 /**
1322  * \def MBEDTLS_SSL_CBC_RECORD_SPLITTING
1323  *
1324  * Enable 1/n-1 record splitting for CBC mode in SSLv3 and TLS 1.0.
1325  *
1326  * This is a countermeasure to the BEAST attack, which also minimizes the risk
1327  * of interoperability issues compared to sending 0-length records.
1328  *
1329  * Comment this macro to disable 1/n-1 record splitting.
1330  */
1331 //#define MBEDTLS_SSL_CBC_RECORD_SPLITTING
1332 
1333 /**
1334  * \def MBEDTLS_SSL_RENEGOTIATION
1335  *
1336  * Enable support for TLS renegotiation.
1337  *
1338  * The two main uses of renegotiation are (1) refresh keys on long-lived
1339  * connections and (2) client authentication after the initial handshake.
1340  * If you don't need renegotiation, it's probably better to disable it, since
1341  * it has been associated with security issues in the past and is easy to
1342  * misuse/misunderstand.
1343  *
1344  * Comment this to disable support for renegotiation.
1345  *
1346  * \note   Even if this option is disabled, both client and server are aware
1347  *         of the Renegotiation Indication Extension (RFC 5746) used to
1348  *         prevent the SSL renegotiation attack (see RFC 5746 Sect. 1).
1349  *         (See \c mbedtls_ssl_conf_legacy_renegotiation for the
1350  *          configuration of this extension).
1351  *
1352  */
1353 //#define MBEDTLS_SSL_RENEGOTIATION
1354 
1355 /**
1356  * \def MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO
1357  *
1358  * Enable support for receiving and parsing SSLv2 Client Hello messages for the
1359  * SSL Server module (MBEDTLS_SSL_SRV_C).
1360  *
1361  * Uncomment this macro to enable support for SSLv2 Client Hello messages.
1362  */
1363 //#define MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO
1364 
1365 /**
1366  * \def MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE
1367  *
1368  * Pick the ciphersuite according to the client's preferences rather than ours
1369  * in the SSL Server module (MBEDTLS_SSL_SRV_C).
1370  *
1371  * Uncomment this macro to respect client's ciphersuite order
1372  */
1373 //#define MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE
1374 
1375 /**
1376  * \def MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
1377  *
1378  * Enable support for RFC 6066 max_fragment_length extension in SSL.
1379  *
1380  * Comment this macro to disable support for the max_fragment_length extension
1381  */
1382 //#define MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
1383 
1384 /**
1385  * \def MBEDTLS_SSL_PROTO_SSL3
1386  *
1387  * Enable support for SSL 3.0.
1388  *
1389  * Requires: MBEDTLS_MD5_C
1390  *           MBEDTLS_SHA1_C
1391  *
1392  * Comment this macro to disable support for SSL 3.0
1393  */
1394 //#define MBEDTLS_SSL_PROTO_SSL3
1395 
1396 /**
1397  * \def MBEDTLS_SSL_PROTO_TLS1
1398  *
1399  * Enable support for TLS 1.0.
1400  *
1401  * Requires: MBEDTLS_MD5_C
1402  *           MBEDTLS_SHA1_C
1403  *
1404  * Comment this macro to disable support for TLS 1.0
1405  */
1406 //#define MBEDTLS_SSL_PROTO_TLS1
1407 
1408 /**
1409  * \def MBEDTLS_SSL_PROTO_TLS1_1
1410  *
1411  * Enable support for TLS 1.1 (and DTLS 1.0 if DTLS is enabled).
1412  *
1413  * Requires: MBEDTLS_MD5_C
1414  *           MBEDTLS_SHA1_C
1415  *
1416  * Comment this macro to disable support for TLS 1.1 / DTLS 1.0
1417  */
1418 //#define MBEDTLS_SSL_PROTO_TLS1_1
1419 
1420 /**
1421  * \def MBEDTLS_SSL_PROTO_TLS1_2
1422  *
1423  * Enable support for TLS 1.2 (and DTLS 1.2 if DTLS is enabled).
1424  *
1425  * Requires: MBEDTLS_SHA1_C or MBEDTLS_SHA256_C or MBEDTLS_SHA512_C
1426  *           (Depends on ciphersuites)
1427  *
1428  * Comment this macro to disable support for TLS 1.2 / DTLS 1.2
1429  */
1430 //#define MBEDTLS_SSL_PROTO_TLS1_2
1431 
1432 /**
1433  * \def MBEDTLS_SSL_PROTO_DTLS
1434  *
1435  * Enable support for DTLS (all available versions).
1436  *
1437  * Enable this and MBEDTLS_SSL_PROTO_TLS1_1 to enable DTLS 1.0,
1438  * and/or this and MBEDTLS_SSL_PROTO_TLS1_2 to enable DTLS 1.2.
1439  *
1440  * Requires: MBEDTLS_SSL_PROTO_TLS1_1
1441  *        or MBEDTLS_SSL_PROTO_TLS1_2
1442  *
1443  * Comment this macro to disable support for DTLS
1444  */
1445 //#define MBEDTLS_SSL_PROTO_DTLS
1446 
1447 /**
1448  * \def MBEDTLS_SSL_ALPN
1449  *
1450  * Enable support for RFC 7301 Application Layer Protocol Negotiation.
1451  *
1452  * Comment this macro to disable support for ALPN.
1453  */
1454 //#define MBEDTLS_SSL_ALPN
1455 
1456 /**
1457  * \def MBEDTLS_SSL_DTLS_ANTI_REPLAY
1458  *
1459  * Enable support for the anti-replay mechanism in DTLS.
1460  *
1461  * Requires: MBEDTLS_SSL_TLS_C
1462  *           MBEDTLS_SSL_PROTO_DTLS
1463  *
1464  * \warning Disabling this is often a security risk!
1465  * See mbedtls_ssl_conf_dtls_anti_replay() for details.
1466  *
1467  * Comment this to disable anti-replay in DTLS.
1468  */
1469 //#define MBEDTLS_SSL_DTLS_ANTI_REPLAY
1470 
1471 /**
1472  * \def MBEDTLS_SSL_DTLS_HELLO_VERIFY
1473  *
1474  * Enable support for HelloVerifyRequest on DTLS servers.
1475  *
1476  * This feature is highly recommended to prevent DTLS servers being used as
1477  * amplifiers in DoS attacks against other hosts. It should always be enabled
1478  * unless you know for sure amplification cannot be a problem in the
1479  * environment in which your server operates.
1480  *
1481  * \warning Disabling this can ba a security risk! (see above)
1482  *
1483  * Requires: MBEDTLS_SSL_PROTO_DTLS
1484  *
1485  * Comment this to disable support for HelloVerifyRequest.
1486  */
1487 //#define MBEDTLS_SSL_DTLS_HELLO_VERIFY
1488 
1489 /**
1490  * \def MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE
1491  *
1492  * Enable server-side support for clients that reconnect from the same port.
1493  *
1494  * Some clients unexpectedly close the connection and try to reconnect using the
1495  * same source port. This needs special support from the server to handle the
1496  * new connection securely, as described in section 4.2.8 of RFC 6347. This
1497  * flag enables that support.
1498  *
1499  * Requires: MBEDTLS_SSL_DTLS_HELLO_VERIFY
1500  *
1501  * Comment this to disable support for clients reusing the source port.
1502  */
1503 //#define MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE
1504 
1505 /**
1506  * \def MBEDTLS_SSL_DTLS_BADMAC_LIMIT
1507  *
1508  * Enable support for a limit of records with bad MAC.
1509  *
1510  * See mbedtls_ssl_conf_dtls_badmac_limit().
1511  *
1512  * Requires: MBEDTLS_SSL_PROTO_DTLS
1513  */
1514 //#define MBEDTLS_SSL_DTLS_BADMAC_LIMIT
1515 
1516 /**
1517  * \def MBEDTLS_SSL_SESSION_TICKETS
1518  *
1519  * Enable support for RFC 5077 session tickets in SSL.
1520  * Client-side, provides full support for session tickets (maintainance of a
1521  * session store remains the responsibility of the application, though).
1522  * Server-side, you also need to provide callbacks for writing and parsing
1523  * tickets, including authenticated encryption and key management. Example
1524  * callbacks are provided by MBEDTLS_SSL_TICKET_C.
1525  *
1526  * Comment this macro to disable support for SSL session tickets
1527  */
1528 //#define MBEDTLS_SSL_SESSION_TICKETS
1529 
1530 /**
1531  * \def MBEDTLS_SSL_EXPORT_KEYS
1532  *
1533  * Enable support for exporting key block and master secret.
1534  * This is required for certain users of TLS, e.g. EAP-TLS.
1535  *
1536  * Comment this macro to disable support for key export
1537  */
1538 //#define MBEDTLS_SSL_EXPORT_KEYS
1539 
1540 /**
1541  * \def MBEDTLS_SSL_SERVER_NAME_INDICATION
1542  *
1543  * Enable support for RFC 6066 server name indication (SNI) in SSL.
1544  *
1545  * Requires: MBEDTLS_X509_CRT_PARSE_C
1546  *
1547  * Comment this macro to disable support for server name indication in SSL
1548  */
1549 //#define MBEDTLS_SSL_SERVER_NAME_INDICATION
1550 
1551 /**
1552  * \def MBEDTLS_SSL_TRUNCATED_HMAC
1553  *
1554  * Enable support for RFC 6066 truncated HMAC in SSL.
1555  *
1556  * Comment this macro to disable support for truncated HMAC in SSL
1557  */
1558 //#define MBEDTLS_SSL_TRUNCATED_HMAC
1559 
1560 /**
1561  * \def MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT
1562  *
1563  * Fallback to old (pre-2.7), non-conforming implementation of the truncated
1564  * HMAC extension which also truncates the HMAC key. Note that this option is
1565  * only meant for a transitory upgrade period and is likely to be removed in
1566  * a future version of the library.
1567  *
1568  * \warning The old implementation is non-compliant and has a security weakness
1569  *          (2^80 brute force attack on the HMAC key used for a single,
1570  *          uninterrupted connection). This should only be enabled temporarily
1571  *          when (1) the use of truncated HMAC is essential in order to save
1572  *          bandwidth, and (2) the peer is an Mbed TLS stack that doesn't use
1573  *          the fixed implementation yet (pre-2.7).
1574  *
1575  * \deprecated This option is deprecated and will likely be removed in a
1576  *             future version of Mbed TLS.
1577  *
1578  * Uncomment to fallback to old, non-compliant truncated HMAC implementation.
1579  *
1580  * Requires: MBEDTLS_SSL_TRUNCATED_HMAC
1581  */
1582 //#define MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT
1583 
1584 /**
1585  * \def MBEDTLS_THREADING_ALT
1586  *
1587  * Provide your own alternate threading implementation.
1588  *
1589  * Requires: MBEDTLS_THREADING_C
1590  *
1591  * Uncomment this to allow your own alternate threading implementation.
1592  */
1593 //#define MBEDTLS_THREADING_ALT
1594 
1595 /**
1596  * \def MBEDTLS_THREADING_PTHREAD
1597  *
1598  * Enable the pthread wrapper layer for the threading layer.
1599  *
1600  * Requires: MBEDTLS_THREADING_C
1601  *
1602  * Uncomment this to enable pthread mutexes.
1603  */
1604 //#define MBEDTLS_THREADING_PTHREAD
1605 
1606 /**
1607  * \def MBEDTLS_VERSION_FEATURES
1608  *
1609  * Allow run-time checking of compile-time enabled features. Thus allowing users
1610  * to check at run-time if the library is for instance compiled with threading
1611  * support via mbedtls_version_check_feature().
1612  *
1613  * Requires: MBEDTLS_VERSION_C
1614  *
1615  * Comment this to disable run-time checking and save ROM space
1616  */
1617 #define MBEDTLS_VERSION_FEATURES
1618 
1619 /**
1620  * \def MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3
1621  *
1622  * If set, the X509 parser will not break-off when parsing an X509 certificate
1623  * and encountering an extension in a v1 or v2 certificate.
1624  *
1625  * Uncomment to prevent an error.
1626  */
1627 //#define MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3
1628 
1629 /**
1630  * \def MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
1631  *
1632  * If set, the X509 parser will not break-off when parsing an X509 certificate
1633  * and encountering an unknown critical extension.
1634  *
1635  * \warning Depending on your PKI use, enabling this can be a security risk!
1636  *
1637  * Uncomment to prevent an error.
1638  */
1639 //#define MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
1640 
1641 /**
1642  * \def MBEDTLS_X509_CHECK_KEY_USAGE
1643  *
1644  * Enable verification of the keyUsage extension (CA and leaf certificates).
1645  *
1646  * Disabling this avoids problems with mis-issued and/or misused
1647  * (intermediate) CA and leaf certificates.
1648  *
1649  * \warning Depending on your PKI use, disabling this can be a security risk!
1650  *
1651  * Comment to skip keyUsage checking for both CA and leaf certificates.
1652  */
1653 //#define MBEDTLS_X509_CHECK_KEY_USAGE
1654 
1655 /**
1656  * \def MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
1657  *
1658  * Enable verification of the extendedKeyUsage extension (leaf certificates).
1659  *
1660  * Disabling this avoids problems with mis-issued and/or misused certificates.
1661  *
1662  * \warning Depending on your PKI use, disabling this can be a security risk!
1663  *
1664  * Comment to skip extendedKeyUsage checking for certificates.
1665  */
1666 //#define MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
1667 
1668 /**
1669  * \def MBEDTLS_X509_RSASSA_PSS_SUPPORT
1670  *
1671  * Enable parsing and verification of X.509 certificates, CRLs and CSRS
1672  * signed with RSASSA-PSS (aka PKCS#1 v2.1).
1673  *
1674  * Comment this macro to disallow using RSASSA-PSS in certificates.
1675  */
1676 //#define MBEDTLS_X509_RSASSA_PSS_SUPPORT
1677 
1678 /**
1679  * \def MBEDTLS_ZLIB_SUPPORT
1680  *
1681  * If set, the SSL/TLS module uses ZLIB to support compression and
1682  * decompression of packet data.
1683  *
1684  * \warning TLS-level compression MAY REDUCE SECURITY! See for example the
1685  * CRIME attack. Before enabling this option, you should examine with care if
1686  * CRIME or similar exploits may be a applicable to your use case.
1687  *
1688  * \note Currently compression can't be used with DTLS.
1689  *
1690  * \deprecated This feature is deprecated and will be removed
1691  *             in the next major revision of the library.
1692  *
1693  * Used in: library/ssl_tls.c
1694  *          library/ssl_cli.c
1695  *          library/ssl_srv.c
1696  *
1697  * This feature requires zlib library and headers to be present.
1698  *
1699  * Uncomment to enable use of ZLIB
1700  */
1701 //#define MBEDTLS_ZLIB_SUPPORT
1702 /* \} name SECTION: mbed TLS feature support */
1703 
1704 /**
1705  * \name SECTION: mbed TLS modules
1706  *
1707  * This section enables or disables entire modules in mbed TLS
1708  * \{
1709  */
1710 
1711 /**
1712  * \def MBEDTLS_AESNI_C
1713  *
1714  * Enable AES-NI support on x86-64.
1715  *
1716  * Module:  library/aesni.c
1717  * Caller:  library/aes.c
1718  *
1719  * Requires: MBEDTLS_HAVE_ASM
1720  *
1721  * This modules adds support for the AES-NI instructions on x86-64
1722  */
1723 //#define MBEDTLS_AESNI_C
1724 
1725 /**
1726  * \def MBEDTLS_AES_C
1727  *
1728  * Enable the AES block cipher.
1729  *
1730  * Module:  library/aes.c
1731  * Caller:  library/cipher.c
1732  *          library/pem.c
1733  *          library/ctr_drbg.c
1734  *
1735  * This module enables the following ciphersuites (if other requisites are
1736  * enabled as well):
1737  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
1738  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
1739  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
1740  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
1741  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
1742  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
1743  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
1744  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
1745  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
1746  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
1747  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
1748  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
1749  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
1750  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
1751  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
1752  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
1753  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
1754  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
1755  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
1756  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
1757  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA
1758  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
1759  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
1760  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
1761  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
1762  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
1763  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
1764  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
1765  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
1766  *      MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA
1767  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384
1768  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384
1769  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384
1770  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA
1771  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA
1772  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256
1773  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256
1774  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256
1775  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA
1776  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA
1777  *      MBEDTLS_TLS_RSA_WITH_AES_256_GCM_SHA384
1778  *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA256
1779  *      MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA
1780  *      MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256
1781  *      MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256
1782  *      MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA
1783  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384
1784  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384
1785  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA
1786  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256
1787  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256
1788  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA
1789  *      MBEDTLS_TLS_PSK_WITH_AES_256_GCM_SHA384
1790  *      MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA384
1791  *      MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA
1792  *      MBEDTLS_TLS_PSK_WITH_AES_128_GCM_SHA256
1793  *      MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA256
1794  *      MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA
1795  *
1796  * PEM_PARSE uses AES for decrypting encrypted keys.
1797  */
1798 #define MBEDTLS_AES_C
1799 
1800 /**
1801  * \def MBEDTLS_ARC4_C
1802  *
1803  * Enable the ARCFOUR stream cipher.
1804  *
1805  * Module:  library/arc4.c
1806  * Caller:  library/cipher.c
1807  *
1808  * This module enables the following ciphersuites (if other requisites are
1809  * enabled as well):
1810  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_RC4_128_SHA
1811  *      MBEDTLS_TLS_ECDH_RSA_WITH_RC4_128_SHA
1812  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
1813  *      MBEDTLS_TLS_ECDHE_RSA_WITH_RC4_128_SHA
1814  *      MBEDTLS_TLS_ECDHE_PSK_WITH_RC4_128_SHA
1815  *      MBEDTLS_TLS_DHE_PSK_WITH_RC4_128_SHA
1816  *      MBEDTLS_TLS_RSA_WITH_RC4_128_SHA
1817  *      MBEDTLS_TLS_RSA_WITH_RC4_128_MD5
1818  *      MBEDTLS_TLS_RSA_PSK_WITH_RC4_128_SHA
1819  *      MBEDTLS_TLS_PSK_WITH_RC4_128_SHA
1820  *
1821  * \warning   ARC4 is considered a weak cipher and its use constitutes a
1822  *            security risk. If possible, we recommend avoidng dependencies on
1823  *            it, and considering stronger ciphers instead.
1824  *
1825  */
1826 //#define MBEDTLS_ARC4_C
1827 
1828 /**
1829  * \def MBEDTLS_ASN1_PARSE_C
1830  *
1831  * Enable the generic ASN1 parser.
1832  *
1833  * Module:  library/asn1.c
1834  * Caller:  library/x509.c
1835  *          library/dhm.c
1836  *          library/pkcs12.c
1837  *          library/pkcs5.c
1838  *          library/pkparse.c
1839  */
1840 #define MBEDTLS_ASN1_PARSE_C
1841 
1842 /**
1843  * \def MBEDTLS_ASN1_WRITE_C
1844  *
1845  * Enable the generic ASN1 writer.
1846  *
1847  * Module:  library/asn1write.c
1848  * Caller:  library/ecdsa.c
1849  *          library/pkwrite.c
1850  *          library/x509_create.c
1851  *          library/x509write_crt.c
1852  *          library/x509write_csr.c
1853  */
1854 #define MBEDTLS_ASN1_WRITE_C
1855 
1856 /**
1857  * \def MBEDTLS_BASE64_C
1858  *
1859  * Enable the Base64 module.
1860  *
1861  * Module:  library/base64.c
1862  * Caller:  library/pem.c
1863  *
1864  * This module is required for PEM support (required by X.509).
1865  */
1866 #define MBEDTLS_BASE64_C
1867 
1868 /**
1869  * \def MBEDTLS_BIGNUM_C
1870  *
1871  * Enable the multi-precision integer library.
1872  *
1873  * Module:  library/bignum.c
1874  * Caller:  library/dhm.c
1875  *          library/ecp.c
1876  *          library/ecdsa.c
1877  *          library/rsa.c
1878  *          library/rsa_internal.c
1879  *          library/ssl_tls.c
1880  *
1881  * This module is required for RSA, DHM and ECC (ECDH, ECDSA) support.
1882  */
1883 #define MBEDTLS_BIGNUM_C
1884 
1885 /**
1886  * \def MBEDTLS_BLOWFISH_C
1887  *
1888  * Enable the Blowfish block cipher.
1889  *
1890  * Module:  library/blowfish.c
1891  */
1892 //#define MBEDTLS_BLOWFISH_C
1893 
1894 /**
1895  * \def MBEDTLS_CAMELLIA_C
1896  *
1897  * Enable the Camellia block cipher.
1898  *
1899  * Module:  library/camellia.c
1900  * Caller:  library/cipher.c
1901  *
1902  * This module enables the following ciphersuites (if other requisites are
1903  * enabled as well):
1904  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
1905  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384
1906  *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256
1907  *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384
1908  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
1909  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384
1910  *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256
1911  *      MBEDTLS_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384
1912  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384
1913  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384
1914  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384
1915  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384
1916  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384
1917  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256
1918  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
1919  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
1920  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
1921  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
1922  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
1923  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
1924  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
1925  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
1926  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384
1927  *      MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384
1928  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384
1929  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256
1930  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
1931  *      MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
1932  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384
1933  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
1934  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
1935  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256
1936  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
1937  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
1938  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384
1939  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384
1940  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256
1941  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256
1942  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384
1943  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384
1944  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256
1945  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256
1946  */
1947 //#define MBEDTLS_CAMELLIA_C
1948 
1949 /**
1950  * \def MBEDTLS_ARIA_C
1951  *
1952  * Enable the ARIA block cipher.
1953  *
1954  * Module:  library/aria.c
1955  * Caller:  library/cipher.c
1956  *
1957  * This module enables the following ciphersuites (if other requisites are
1958  * enabled as well):
1959  *
1960  *      MBEDTLS_TLS_RSA_WITH_ARIA_128_CBC_SHA256
1961  *      MBEDTLS_TLS_RSA_WITH_ARIA_256_CBC_SHA384
1962  *      MBEDTLS_TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256
1963  *      MBEDTLS_TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384
1964  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256
1965  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384
1966  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256
1967  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384
1968  *      MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256
1969  *      MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384
1970  *      MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256
1971  *      MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384
1972  *      MBEDTLS_TLS_RSA_WITH_ARIA_128_GCM_SHA256
1973  *      MBEDTLS_TLS_RSA_WITH_ARIA_256_GCM_SHA384
1974  *      MBEDTLS_TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256
1975  *      MBEDTLS_TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384
1976  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256
1977  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384
1978  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256
1979  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384
1980  *      MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256
1981  *      MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384
1982  *      MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256
1983  *      MBEDTLS_TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384
1984  *      MBEDTLS_TLS_PSK_WITH_ARIA_128_CBC_SHA256
1985  *      MBEDTLS_TLS_PSK_WITH_ARIA_256_CBC_SHA384
1986  *      MBEDTLS_TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256
1987  *      MBEDTLS_TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384
1988  *      MBEDTLS_TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256
1989  *      MBEDTLS_TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384
1990  *      MBEDTLS_TLS_PSK_WITH_ARIA_128_GCM_SHA256
1991  *      MBEDTLS_TLS_PSK_WITH_ARIA_256_GCM_SHA384
1992  *      MBEDTLS_TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256
1993  *      MBEDTLS_TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384
1994  *      MBEDTLS_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256
1995  *      MBEDTLS_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384
1996  *      MBEDTLS_TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256
1997  *      MBEDTLS_TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384
1998  */
1999 //#define MBEDTLS_ARIA_C
2000 
2001 /**
2002  * \def MBEDTLS_CCM_C
2003  *
2004  * Enable the Counter with CBC-MAC (CCM) mode for 128-bit block cipher.
2005  *
2006  * Module:  library/ccm.c
2007  *
2008  * Requires: MBEDTLS_AES_C or MBEDTLS_CAMELLIA_C
2009  *
2010  * This module enables the AES-CCM ciphersuites, if other requisites are
2011  * enabled as well.
2012  */
2013 #define MBEDTLS_CCM_C
2014 
2015 /**
2016  * \def MBEDTLS_CERTS_C
2017  *
2018  * Enable the test certificates.
2019  *
2020  * Module:  library/certs.c
2021  * Caller:
2022  *
2023  * This module is used for testing (ssl_client/server).
2024  */
2025 //#define MBEDTLS_CERTS_C
2026 
2027 /**
2028  * \def MBEDTLS_CHACHA20_C
2029  *
2030  * Enable the ChaCha20 stream cipher.
2031  *
2032  * Module:  library/chacha20.c
2033  */
2034 #define MBEDTLS_CHACHA20_C
2035 
2036 /**
2037  * \def MBEDTLS_CHACHAPOLY_C
2038  *
2039  * Enable the ChaCha20-Poly1305 AEAD algorithm.
2040  *
2041  * Module:  library/chachapoly.c
2042  *
2043  * This module requires: MBEDTLS_CHACHA20_C, MBEDTLS_POLY1305_C
2044  */
2045 #define MBEDTLS_CHACHAPOLY_C
2046 
2047 /**
2048  * \def MBEDTLS_CIPHER_C
2049  *
2050  * Enable the generic cipher layer.
2051  *
2052  * Module:  library/cipher.c
2053  * Caller:  library/ssl_tls.c
2054  *
2055  * Uncomment to enable generic cipher wrappers.
2056  */
2057 #define MBEDTLS_CIPHER_C
2058 
2059 /**
2060  * \def MBEDTLS_CMAC_C
2061  *
2062  * Enable the CMAC (Cipher-based Message Authentication Code) mode for block
2063  * ciphers.
2064  *
2065  * Module:  library/cmac.c
2066  *
2067  * Requires: MBEDTLS_AES_C or MBEDTLS_DES_C
2068  *
2069  */
2070 #define MBEDTLS_CMAC_C
2071 
2072 /**
2073  * \def MBEDTLS_CTR_DRBG_C
2074  *
2075  * Enable the CTR_DRBG AES-based random generator.
2076  * The CTR_DRBG generator uses AES-256 by default.
2077  * To use AES-128 instead, enable MBEDTLS_CTR_DRBG_USE_128_BIT_KEY below.
2078  *
2079  * Module:  library/ctr_drbg.c
2080  * Caller:
2081  *
2082  * Requires: MBEDTLS_AES_C
2083  *
2084  * This module provides the CTR_DRBG AES random number generator.
2085  */
2086 #define MBEDTLS_CTR_DRBG_C
2087 
2088 /**
2089  * \def MBEDTLS_DEBUG_C
2090  *
2091  * Enable the debug functions.
2092  *
2093  * Module:  library/debug.c
2094  * Caller:  library/ssl_cli.c
2095  *          library/ssl_srv.c
2096  *          library/ssl_tls.c
2097  *
2098  * This module provides debugging functions.
2099  */
2100 //#define MBEDTLS_DEBUG_C
2101 
2102 /**
2103  * \def MBEDTLS_DES_C
2104  *
2105  * Enable the DES block cipher.
2106  *
2107  * Module:  library/des.c
2108  * Caller:  library/pem.c
2109  *          library/cipher.c
2110  *
2111  * This module enables the following ciphersuites (if other requisites are
2112  * enabled as well):
2113  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
2114  *      MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
2115  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
2116  *      MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
2117  *      MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
2118  *      MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA
2119  *      MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA
2120  *      MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA
2121  *      MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA
2122  *      MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA
2123  *
2124  * PEM_PARSE uses DES/3DES for decrypting encrypted keys.
2125  *
2126  * \warning   DES is considered a weak cipher and its use constitutes a
2127  *            security risk. We recommend considering stronger ciphers instead.
2128  */
2129 //#define MBEDTLS_DES_C
2130 
2131 /**
2132  * \def MBEDTLS_DHM_C
2133  *
2134  * Enable the Diffie-Hellman-Merkle module.
2135  *
2136  * Module:  library/dhm.c
2137  * Caller:  library/ssl_cli.c
2138  *          library/ssl_srv.c
2139  *
2140  * This module is used by the following key exchanges:
2141  *      DHE-RSA, DHE-PSK
2142  *
2143  * \warning    Using DHE constitutes a security risk as it
2144  *             is not possible to validate custom DH parameters.
2145  *             If possible, it is recommended users should consider
2146  *             preferring other methods of key exchange.
2147  *             See dhm.h for more details.
2148  *
2149  */
2150 #define MBEDTLS_DHM_C
2151 
2152 /**
2153  * \def MBEDTLS_ECDH_C
2154  *
2155  * Enable the elliptic curve Diffie-Hellman library.
2156  *
2157  * Module:  library/ecdh.c
2158  * Caller:  library/ssl_cli.c
2159  *          library/ssl_srv.c
2160  *
2161  * This module is used by the following key exchanges:
2162  *      ECDHE-ECDSA, ECDHE-RSA, DHE-PSK
2163  *
2164  * Requires: MBEDTLS_ECP_C
2165  */
2166 #define MBEDTLS_ECDH_C
2167 
2168 /**
2169  * \def MBEDTLS_ECDSA_C
2170  *
2171  * Enable the elliptic curve DSA library.
2172  *
2173  * Module:  library/ecdsa.c
2174  * Caller:
2175  *
2176  * This module is used by the following key exchanges:
2177  *      ECDHE-ECDSA
2178  *
2179  * Requires: MBEDTLS_ECP_C, MBEDTLS_ASN1_WRITE_C, MBEDTLS_ASN1_PARSE_C
2180  */
2181 #define MBEDTLS_ECDSA_C
2182 
2183 /**
2184  * \def MBEDTLS_ECJPAKE_C
2185  *
2186  * Enable the elliptic curve J-PAKE library.
2187  *
2188  * \warning This is currently experimental. EC J-PAKE support is based on the
2189  * Thread v1.0.0 specification; incompatible changes to the specification
2190  * might still happen. For this reason, this is disabled by default.
2191  *
2192  * Module:  library/ecjpake.c
2193  * Caller:
2194  *
2195  * This module is used by the following key exchanges:
2196  *      ECJPAKE
2197  *
2198  * Requires: MBEDTLS_ECP_C, MBEDTLS_MD_C
2199  */
2200 //#define MBEDTLS_ECJPAKE_C
2201 
2202 /**
2203  * \def MBEDTLS_ECP_C
2204  *
2205  * Enable the elliptic curve over GF(p) library.
2206  *
2207  * Module:  library/ecp.c
2208  * Caller:  library/ecdh.c
2209  *          library/ecdsa.c
2210  *          library/ecjpake.c
2211  *
2212  * Requires: MBEDTLS_BIGNUM_C and at least one MBEDTLS_ECP_DP_XXX_ENABLED
2213  */
2214 #define MBEDTLS_ECP_C
2215 
2216 /**
2217  * \def MBEDTLS_ENTROPY_C
2218  *
2219  * Enable the platform-specific entropy code.
2220  *
2221  * Module:  library/entropy.c
2222  * Caller:
2223  *
2224  * Requires: MBEDTLS_SHA512_C or MBEDTLS_SHA256_C
2225  *
2226  * This module provides a generic entropy pool
2227  */
2228 #define MBEDTLS_ENTROPY_C
2229 
2230 /**
2231  * \def MBEDTLS_ERROR_C
2232  *
2233  * Enable error code to error string conversion.
2234  *
2235  * Module:  library/error.c
2236  * Caller:
2237  *
2238  * This module enables mbedtls_strerror().
2239  */
2240 //#define MBEDTLS_ERROR_C
2241 
2242 /**
2243  * \def MBEDTLS_GCM_C
2244  *
2245  * Enable the Galois/Counter Mode (GCM) for AES.
2246  *
2247  * Module:  library/gcm.c
2248  *
2249  * Requires: MBEDTLS_AES_C or MBEDTLS_CAMELLIA_C
2250  *
2251  * This module enables the AES-GCM and CAMELLIA-GCM ciphersuites, if other
2252  * requisites are enabled as well.
2253  */
2254 #define MBEDTLS_GCM_C
2255 
2256 /**
2257  * \def MBEDTLS_HAVEGE_C
2258  *
2259  * Enable the HAVEGE random generator.
2260  *
2261  * Warning: the HAVEGE random generator is not suitable for virtualized
2262  *          environments
2263  *
2264  * Warning: the HAVEGE random generator is dependent on timing and specific
2265  *          processor traits. It is therefore not advised to use HAVEGE as
2266  *          your applications primary random generator or primary entropy pool
2267  *          input. As a secondary input to your entropy pool, it IS able add
2268  *          the (limited) extra entropy it provides.
2269  *
2270  * Module:  library/havege.c
2271  * Caller:
2272  *
2273  * Requires: MBEDTLS_TIMING_C
2274  *
2275  * Uncomment to enable the HAVEGE random generator.
2276  */
2277 //#define MBEDTLS_HAVEGE_C
2278 
2279 /**
2280  * \def MBEDTLS_HKDF_C
2281  *
2282  * Enable the HKDF algorithm (RFC 5869).
2283  *
2284  * Module:  library/hkdf.c
2285  * Caller:
2286  *
2287  * Requires: MBEDTLS_MD_C
2288  *
2289  * This module adds support for the Hashed Message Authentication Code
2290  * (HMAC)-based key derivation function (HKDF).
2291  */
2292 #define MBEDTLS_HKDF_C
2293 
2294 /**
2295  * \def MBEDTLS_HMAC_DRBG_C
2296  *
2297  * Enable the HMAC_DRBG random generator.
2298  *
2299  * Module:  library/hmac_drbg.c
2300  * Caller:
2301  *
2302  * Requires: MBEDTLS_MD_C
2303  *
2304  * Uncomment to enable the HMAC_DRBG random number geerator.
2305  */
2306 #define MBEDTLS_HMAC_DRBG_C
2307 
2308 /**
2309  * \def MBEDTLS_NIST_KW_C
2310  *
2311  * Enable the Key Wrapping mode for 128-bit block ciphers,
2312  * as defined in NIST SP 800-38F. Only KW and KWP modes
2313  * are supported. At the moment, only AES is approved by NIST.
2314  *
2315  * Module:  library/nist_kw.c
2316  *
2317  * Requires: MBEDTLS_AES_C and MBEDTLS_CIPHER_C
2318  */
2319 #define MBEDTLS_NIST_KW_C
2320 
2321 /**
2322  * \def MBEDTLS_MD_C
2323  *
2324  * Enable the generic message digest layer.
2325  *
2326  * Module:  library/md.c
2327  * Caller:
2328  *
2329  * Uncomment to enable generic message digest wrappers.
2330  */
2331 #define MBEDTLS_MD_C
2332 
2333 /**
2334  * \def MBEDTLS_MD2_C
2335  *
2336  * Enable the MD2 hash algorithm.
2337  *
2338  * Module:  library/md2.c
2339  * Caller:
2340  *
2341  * Uncomment to enable support for (rare) MD2-signed X.509 certs.
2342  *
2343  * \warning   MD2 is considered a weak message digest and its use constitutes a
2344  *            security risk. If possible, we recommend avoiding dependencies on
2345  *            it, and considering stronger message digests instead.
2346  *
2347  */
2348 //#define MBEDTLS_MD2_C
2349 
2350 /**
2351  * \def MBEDTLS_MD4_C
2352  *
2353  * Enable the MD4 hash algorithm.
2354  *
2355  * Module:  library/md4.c
2356  * Caller:
2357  *
2358  * Uncomment to enable support for (rare) MD4-signed X.509 certs.
2359  *
2360  * \warning   MD4 is considered a weak message digest and its use constitutes a
2361  *            security risk. If possible, we recommend avoiding dependencies on
2362  *            it, and considering stronger message digests instead.
2363  *
2364  */
2365 //#define MBEDTLS_MD4_C
2366 
2367 /**
2368  * \def MBEDTLS_MD5_C
2369  *
2370  * Enable the MD5 hash algorithm.
2371  *
2372  * Module:  library/md5.c
2373  * Caller:  library/md.c
2374  *          library/pem.c
2375  *          library/ssl_tls.c
2376  *
2377  * This module is required for SSL/TLS up to version 1.1, and for TLS 1.2
2378  * depending on the handshake parameters. Further, it is used for checking
2379  * MD5-signed certificates, and for PBKDF1 when decrypting PEM-encoded
2380  * encrypted keys.
2381  *
2382  * \warning   MD5 is considered a weak message digest and its use constitutes a
2383  *            security risk. If possible, we recommend avoiding dependencies on
2384  *            it, and considering stronger message digests instead.
2385  *
2386  */
2387 //#define MBEDTLS_MD5_C
2388 
2389 /**
2390  * \def MBEDTLS_MEMORY_BUFFER_ALLOC_C
2391  *
2392  * Enable the buffer allocator implementation that makes use of a (stack)
2393  * based buffer to 'allocate' dynamic memory. (replaces calloc() and free()
2394  * calls)
2395  *
2396  * Module:  library/memory_buffer_alloc.c
2397  *
2398  * Requires: MBEDTLS_PLATFORM_C
2399  *           MBEDTLS_PLATFORM_MEMORY (to use it within mbed TLS)
2400  *
2401  * Enable this module to enable the buffer memory allocator.
2402  */
2403 #define MBEDTLS_MEMORY_BUFFER_ALLOC_C
2404 
2405 /**
2406  * \def MBEDTLS_NET_C
2407  *
2408  * Enable the TCP and UDP over IPv6/IPv4 networking routines.
2409  *
2410  * \note This module only works on POSIX/Unix (including Linux, BSD and OS X)
2411  * and Windows. For other platforms, you'll want to disable it, and write your
2412  * own networking callbacks to be passed to \c mbedtls_ssl_set_bio().
2413  *
2414  * \note See also our Knowledge Base article about porting to a new
2415  * environment:
2416  * https://tls.mbed.org/kb/how-to/how-do-i-port-mbed-tls-to-a-new-environment-OS
2417  *
2418  * Module:  library/net_sockets.c
2419  *
2420  * This module provides networking routines.
2421  */
2422 //#define MBEDTLS_NET_C
2423 
2424 /**
2425  * \def MBEDTLS_OID_C
2426  *
2427  * Enable the OID database.
2428  *
2429  * Module:  library/oid.c
2430  * Caller:  library/asn1write.c
2431  *          library/pkcs5.c
2432  *          library/pkparse.c
2433  *          library/pkwrite.c
2434  *          library/rsa.c
2435  *          library/x509.c
2436  *          library/x509_create.c
2437  *          library/x509_crl.c
2438  *          library/x509_crt.c
2439  *          library/x509_csr.c
2440  *          library/x509write_crt.c
2441  *          library/x509write_csr.c
2442  *
2443  * This modules translates between OIDs and internal values.
2444  */
2445 #define MBEDTLS_OID_C
2446 
2447 /**
2448  * \def MBEDTLS_PADLOCK_C
2449  *
2450  * Enable VIA Padlock support on x86.
2451  *
2452  * Module:  library/padlock.c
2453  * Caller:  library/aes.c
2454  *
2455  * Requires: MBEDTLS_HAVE_ASM
2456  *
2457  * This modules adds support for the VIA PadLock on x86.
2458  */
2459 //#define MBEDTLS_PADLOCK_C
2460 
2461 /**
2462  * \def MBEDTLS_PEM_PARSE_C
2463  *
2464  * Enable PEM decoding / parsing.
2465  *
2466  * Module:  library/pem.c
2467  * Caller:  library/dhm.c
2468  *          library/pkparse.c
2469  *          library/x509_crl.c
2470  *          library/x509_crt.c
2471  *          library/x509_csr.c
2472  *
2473  * Requires: MBEDTLS_BASE64_C
2474  *
2475  * This modules adds support for decoding / parsing PEM files.
2476  */
2477 #define MBEDTLS_PEM_PARSE_C
2478 
2479 /**
2480  * \def MBEDTLS_PEM_WRITE_C
2481  *
2482  * Enable PEM encoding / writing.
2483  *
2484  * Module:  library/pem.c
2485  * Caller:  library/pkwrite.c
2486  *          library/x509write_crt.c
2487  *          library/x509write_csr.c
2488  *
2489  * Requires: MBEDTLS_BASE64_C
2490  *
2491  * This modules adds support for encoding / writing PEM files.
2492  */
2493 #define MBEDTLS_PEM_WRITE_C
2494 
2495 /**
2496  * \def MBEDTLS_PK_C
2497  *
2498  * Enable the generic public (asymetric) key layer.
2499  *
2500  * Module:  library/pk.c
2501  * Caller:  library/ssl_tls.c
2502  *          library/ssl_cli.c
2503  *          library/ssl_srv.c
2504  *
2505  * Requires: MBEDTLS_RSA_C or MBEDTLS_ECP_C
2506  *
2507  * Uncomment to enable generic public key wrappers.
2508  */
2509 #define MBEDTLS_PK_C
2510 
2511 /**
2512  * \def MBEDTLS_PK_PARSE_C
2513  *
2514  * Enable the generic public (asymetric) key parser.
2515  *
2516  * Module:  library/pkparse.c
2517  * Caller:  library/x509_crt.c
2518  *          library/x509_csr.c
2519  *
2520  * Requires: MBEDTLS_PK_C
2521  *
2522  * Uncomment to enable generic public key parse functions.
2523  */
2524 #define MBEDTLS_PK_PARSE_C
2525 
2526 /**
2527  * \def MBEDTLS_PK_WRITE_C
2528  *
2529  * Enable the generic public (asymetric) key writer.
2530  *
2531  * Module:  library/pkwrite.c
2532  * Caller:  library/x509write.c
2533  *
2534  * Requires: MBEDTLS_PK_C
2535  *
2536  * Uncomment to enable generic public key write functions.
2537  */
2538 #define MBEDTLS_PK_WRITE_C
2539 
2540 /**
2541  * \def MBEDTLS_PKCS5_C
2542  *
2543  * Enable PKCS#5 functions.
2544  *
2545  * Module:  library/pkcs5.c
2546  *
2547  * Requires: MBEDTLS_MD_C
2548  *
2549  * This module adds support for the PKCS#5 functions.
2550  */
2551 #define MBEDTLS_PKCS5_C
2552 
2553 /**
2554  * \def MBEDTLS_PKCS11_C
2555  *
2556  * Enable wrapper for PKCS#11 smartcard support.
2557  *
2558  * Module:  library/pkcs11.c
2559  * Caller:  library/pk.c
2560  *
2561  * Requires: MBEDTLS_PK_C
2562  *
2563  * This module enables SSL/TLS PKCS #11 smartcard support.
2564  * Requires the presence of the PKCS#11 helper library (libpkcs11-helper)
2565  */
2566 //#define MBEDTLS_PKCS11_C
2567 
2568 /**
2569  * \def MBEDTLS_PKCS12_C
2570  *
2571  * Enable PKCS#12 PBE functions.
2572  * Adds algorithms for parsing PKCS#8 encrypted private keys
2573  *
2574  * Module:  library/pkcs12.c
2575  * Caller:  library/pkparse.c
2576  *
2577  * Requires: MBEDTLS_ASN1_PARSE_C, MBEDTLS_CIPHER_C, MBEDTLS_MD_C
2578  * Can use:  MBEDTLS_ARC4_C
2579  *
2580  * This module enables PKCS#12 functions.
2581  */
2582 //#define MBEDTLS_PKCS12_C
2583 
2584 /**
2585  * \def MBEDTLS_PLATFORM_C
2586  *
2587  * Enable the platform abstraction layer that allows you to re-assign
2588  * functions like calloc(), free(), snprintf(), printf(), fprintf(), exit().
2589  *
2590  * Enabling MBEDTLS_PLATFORM_C enables to use of MBEDTLS_PLATFORM_XXX_ALT
2591  * or MBEDTLS_PLATFORM_XXX_MACRO directives, allowing the functions mentioned
2592  * above to be specified at runtime or compile time respectively.
2593  *
2594  * \note This abstraction layer must be enabled on Windows (including MSYS2)
2595  * as other module rely on it for a fixed snprintf implementation.
2596  *
2597  * Module:  library/platform.c
2598  * Caller:  Most other .c files
2599  *
2600  * This module enables abstraction of common (libc) functions.
2601  */
2602 #define MBEDTLS_PLATFORM_C
2603 
2604 /**
2605  * \def MBEDTLS_POLY1305_C
2606  *
2607  * Enable the Poly1305 MAC algorithm.
2608  *
2609  * Module:  library/poly1305.c
2610  * Caller:  library/chachapoly.c
2611  */
2612 #define MBEDTLS_POLY1305_C
2613 
2614 /**
2615  * \def MBEDTLS_RIPEMD160_C
2616  *
2617  * Enable the RIPEMD-160 hash algorithm.
2618  *
2619  * Module:  library/ripemd160.c
2620  * Caller:  library/md.c
2621  *
2622  */
2623 //#define MBEDTLS_RIPEMD160_C
2624 
2625 /**
2626  * \def MBEDTLS_RSA_C
2627  *
2628  * Enable the RSA public-key cryptosystem.
2629  *
2630  * Module:  library/rsa.c
2631  *          library/rsa_internal.c
2632  * Caller:  library/ssl_cli.c
2633  *          library/ssl_srv.c
2634  *          library/ssl_tls.c
2635  *          library/x509.c
2636  *
2637  * This module is used by the following key exchanges:
2638  *      RSA, DHE-RSA, ECDHE-RSA, RSA-PSK
2639  *
2640  * Requires: MBEDTLS_BIGNUM_C, MBEDTLS_OID_C
2641  */
2642 #define MBEDTLS_RSA_C
2643 
2644 /**
2645  * \def MBEDTLS_SHA1_C
2646  *
2647  * Enable the SHA1 cryptographic hash algorithm.
2648  *
2649  * Module:  library/sha1.c
2650  * Caller:  library/md.c
2651  *          library/ssl_cli.c
2652  *          library/ssl_srv.c
2653  *          library/ssl_tls.c
2654  *          library/x509write_crt.c
2655  *
2656  * This module is required for SSL/TLS up to version 1.1, for TLS 1.2
2657  * depending on the handshake parameters, and for SHA1-signed certificates.
2658  *
2659  * \warning   SHA-1 is considered a weak message digest and its use constitutes
2660  *            a security risk. If possible, we recommend avoiding dependencies
2661  *            on it, and considering stronger message digests instead.
2662  *
2663  */
2664 #define MBEDTLS_SHA1_C
2665 
2666 /**
2667  * \def MBEDTLS_SHA256_C
2668  *
2669  * Enable the SHA-224 and SHA-256 cryptographic hash algorithms.
2670  *
2671  * Module:  library/sha256.c
2672  * Caller:  library/entropy.c
2673  *          library/md.c
2674  *          library/ssl_cli.c
2675  *          library/ssl_srv.c
2676  *          library/ssl_tls.c
2677  *
2678  * This module adds support for SHA-224 and SHA-256.
2679  * This module is required for the SSL/TLS 1.2 PRF function.
2680  */
2681 #define MBEDTLS_SHA256_C
2682 
2683 /**
2684  * \def MBEDTLS_SHA512_C
2685  *
2686  * Enable the SHA-384 and SHA-512 cryptographic hash algorithms.
2687  *
2688  * Module:  library/sha512.c
2689  * Caller:  library/entropy.c
2690  *          library/md.c
2691  *          library/ssl_cli.c
2692  *          library/ssl_srv.c
2693  *
2694  * This module adds support for SHA-384 and SHA-512.
2695  */
2696 #define MBEDTLS_SHA512_C
2697 
2698 /**
2699  * \def MBEDTLS_SSL_CACHE_C
2700  *
2701  * Enable simple SSL cache implementation.
2702  *
2703  * Module:  library/ssl_cache.c
2704  * Caller:
2705  *
2706  * Requires: MBEDTLS_SSL_CACHE_C
2707  */
2708 //#define MBEDTLS_SSL_CACHE_C
2709 
2710 /**
2711  * \def MBEDTLS_SSL_COOKIE_C
2712  *
2713  * Enable basic implementation of DTLS cookies for hello verification.
2714  *
2715  * Module:  library/ssl_cookie.c
2716  * Caller:
2717  */
2718 //#define MBEDTLS_SSL_COOKIE_C
2719 
2720 /**
2721  * \def MBEDTLS_SSL_TICKET_C
2722  *
2723  * Enable an implementation of TLS server-side callbacks for session tickets.
2724  *
2725  * Module:  library/ssl_ticket.c
2726  * Caller:
2727  *
2728  * Requires: MBEDTLS_CIPHER_C
2729  */
2730 //#define MBEDTLS_SSL_TICKET_C
2731 
2732 /**
2733  * \def MBEDTLS_SSL_CLI_C
2734  *
2735  * Enable the SSL/TLS client code.
2736  *
2737  * Module:  library/ssl_cli.c
2738  * Caller:
2739  *
2740  * Requires: MBEDTLS_SSL_TLS_C
2741  *
2742  * This module is required for SSL/TLS client support.
2743  */
2744 //#define MBEDTLS_SSL_CLI_C
2745 
2746 /**
2747  * \def MBEDTLS_SSL_SRV_C
2748  *
2749  * Enable the SSL/TLS server code.
2750  *
2751  * Module:  library/ssl_srv.c
2752  * Caller:
2753  *
2754  * Requires: MBEDTLS_SSL_TLS_C
2755  *
2756  * This module is required for SSL/TLS server support.
2757  */
2758 //#define MBEDTLS_SSL_SRV_C
2759 
2760 /**
2761  * \def MBEDTLS_SSL_TLS_C
2762  *
2763  * Enable the generic SSL/TLS code.
2764  *
2765  * Module:  library/ssl_tls.c
2766  * Caller:  library/ssl_cli.c
2767  *          library/ssl_srv.c
2768  *
2769  * Requires: MBEDTLS_CIPHER_C, MBEDTLS_MD_C
2770  *           and at least one of the MBEDTLS_SSL_PROTO_XXX defines
2771  *
2772  * This module is required for SSL/TLS.
2773  */
2774 //#define MBEDTLS_SSL_TLS_C
2775 
2776 /**
2777  * \def MBEDTLS_THREADING_C
2778  *
2779  * Enable the threading abstraction layer.
2780  * By default mbed TLS assumes it is used in a non-threaded environment or that
2781  * contexts are not shared between threads. If you do intend to use contexts
2782  * between threads, you will need to enable this layer to prevent race
2783  * conditions. See also our Knowledge Base article about threading:
2784  * https://tls.mbed.org/kb/development/thread-safety-and-multi-threading
2785  *
2786  * Module:  library/threading.c
2787  *
2788  * This allows different threading implementations (self-implemented or
2789  * provided).
2790  *
2791  * You will have to enable either MBEDTLS_THREADING_ALT or
2792  * MBEDTLS_THREADING_PTHREAD.
2793  *
2794  * Enable this layer to allow use of mutexes within mbed TLS
2795  */
2796 //#define MBEDTLS_THREADING_C
2797 
2798 /**
2799  * \def MBEDTLS_TIMING_C
2800  *
2801  * Enable the semi-portable timing interface.
2802  *
2803  * \note The provided implementation only works on POSIX/Unix (including Linux,
2804  * BSD and OS X) and Windows. On other platforms, you can either disable that
2805  * module and provide your own implementations of the callbacks needed by
2806  * \c mbedtls_ssl_set_timer_cb() for DTLS, or leave it enabled and provide
2807  * your own implementation of the whole module by setting
2808  * \c MBEDTLS_TIMING_ALT in the current file.
2809  *
2810  * \note See also our Knowledge Base article about porting to a new
2811  * environment:
2812  * https://tls.mbed.org/kb/how-to/how-do-i-port-mbed-tls-to-a-new-environment-OS
2813  *
2814  * Module:  library/timing.c
2815  * Caller:  library/havege.c
2816  *
2817  * This module is used by the HAVEGE random number generator.
2818  */
2819 //#define MBEDTLS_TIMING_C
2820 
2821 /**
2822  * \def MBEDTLS_VERSION_C
2823  *
2824  * Enable run-time version information.
2825  *
2826  * Module:  library/version.c
2827  *
2828  * This module provides run-time version information.
2829  */
2830 #define MBEDTLS_VERSION_C
2831 
2832 /**
2833  * \def MBEDTLS_X509_USE_C
2834  *
2835  * Enable X.509 core for using certificates.
2836  *
2837  * Module:  library/x509.c
2838  * Caller:  library/x509_crl.c
2839  *          library/x509_crt.c
2840  *          library/x509_csr.c
2841  *
2842  * Requires: MBEDTLS_ASN1_PARSE_C, MBEDTLS_BIGNUM_C, MBEDTLS_OID_C,
2843  *           MBEDTLS_PK_PARSE_C
2844  *
2845  * This module is required for the X.509 parsing modules.
2846  */
2847 //#define MBEDTLS_X509_USE_C
2848 
2849 /**
2850  * \def MBEDTLS_X509_CRT_PARSE_C
2851  *
2852  * Enable X.509 certificate parsing.
2853  *
2854  * Module:  library/x509_crt.c
2855  * Caller:  library/ssl_cli.c
2856  *          library/ssl_srv.c
2857  *          library/ssl_tls.c
2858  *
2859  * Requires: MBEDTLS_X509_USE_C
2860  *
2861  * This module is required for X.509 certificate parsing.
2862  */
2863 //#define MBEDTLS_X509_CRT_PARSE_C
2864 
2865 /**
2866  * \def MBEDTLS_X509_CRL_PARSE_C
2867  *
2868  * Enable X.509 CRL parsing.
2869  *
2870  * Module:  library/x509_crl.c
2871  * Caller:  library/x509_crt.c
2872  *
2873  * Requires: MBEDTLS_X509_USE_C
2874  *
2875  * This module is required for X.509 CRL parsing.
2876  */
2877 //#define MBEDTLS_X509_CRL_PARSE_C
2878 
2879 /**
2880  * \def MBEDTLS_X509_CSR_PARSE_C
2881  *
2882  * Enable X.509 Certificate Signing Request (CSR) parsing.
2883  *
2884  * Module:  library/x509_csr.c
2885  * Caller:  library/x509_crt_write.c
2886  *
2887  * Requires: MBEDTLS_X509_USE_C
2888  *
2889  * This module is used for reading X.509 certificate request.
2890  */
2891 //#define MBEDTLS_X509_CSR_PARSE_C
2892 
2893 /**
2894  * \def MBEDTLS_X509_CREATE_C
2895  *
2896  * Enable X.509 core for creating certificates.
2897  *
2898  * Module:  library/x509_create.c
2899  *
2900  * Requires: MBEDTLS_BIGNUM_C, MBEDTLS_OID_C, MBEDTLS_PK_WRITE_C
2901  *
2902  * This module is the basis for creating X.509 certificates and CSRs.
2903  */
2904 //#define MBEDTLS_X509_CREATE_C
2905 
2906 /**
2907  * \def MBEDTLS_X509_CRT_WRITE_C
2908  *
2909  * Enable creating X.509 certificates.
2910  *
2911  * Module:  library/x509_crt_write.c
2912  *
2913  * Requires: MBEDTLS_X509_CREATE_C
2914  *
2915  * This module is required for X.509 certificate creation.
2916  */
2917 //#define MBEDTLS_X509_CRT_WRITE_C
2918 
2919 /**
2920  * \def MBEDTLS_X509_CSR_WRITE_C
2921  *
2922  * Enable creating X.509 Certificate Signing Requests (CSR).
2923  *
2924  * Module:  library/x509_csr_write.c
2925  *
2926  * Requires: MBEDTLS_X509_CREATE_C
2927  *
2928  * This module is required for X.509 certificate request writing.
2929  */
2930 //#define MBEDTLS_X509_CSR_WRITE_C
2931 
2932 /**
2933  * \def MBEDTLS_XTEA_C
2934  *
2935  * Enable the XTEA block cipher.
2936  *
2937  * Module:  library/xtea.c
2938  * Caller:
2939  */
2940 //#define MBEDTLS_XTEA_C
2941 
2942 /* \} name SECTION: mbed TLS modules */
2943 
2944 /**
2945  * \name SECTION: Module configuration options
2946  *
2947  * This section allows for the setting of module specific sizes and
2948  * configuration options. The default values are already present in the
2949  * relevant header files and should suffice for the regular use cases.
2950  *
2951  * Our advice is to enable options and change their values here
2952  * only if you have a good reason and know the consequences.
2953  *
2954  * Please check the respective header file for documentation on these
2955  * parameters (to prevent duplicate documentation).
2956  * \{
2957  */
2958 
2959 /* MPI / BIGNUM options */
2960 //#define MBEDTLS_MPI_WINDOW_SIZE            6 /**< Maximum windows size used. */
2961 //#define MBEDTLS_MPI_MAX_SIZE            1024 /**< Maximum number of bytes for usable MPIs. */
2962 
2963 /* CTR_DRBG options */
2964 //#define MBEDTLS_CTR_DRBG_ENTROPY_LEN               48 /**< Amount of entropy used per seed by default (48 with SHA-512, 32 with SHA-256) */
2965 /*!  Maximal reseed counter - indicates maximal number of
2966 requests allowed between reseeds; according to NIST 800-90
2967 it is (2^48 - 1), our restriction is :  (int - 0xFFFF - 0xF ).*/
2968 #define MBEDTLS_CTR_DRBG_RESEED_INTERVAL            0xFFF0 /**< Interval before reseed is performed by default */
2969 //#define MBEDTLS_CTR_DRBG_MAX_INPUT                256 /**< Maximum number of additional input bytes */
2970 //#define MBEDTLS_CTR_DRBG_MAX_REQUEST             1024 /**< Maximum number of requested bytes per call */
2971 //#define MBEDTLS_CTR_DRBG_MAX_SEED_INPUT           384 /**< Maximum size of (re)seed buffer */
2972 //#define MBEDTLS_CTR_DRBG_USE_128_BIT_KEY              /**< Use 128-bit key for CTR_DRBG - may reduce security (see ctr_drbg.h) */
2973 
2974 /* HMAC_DRBG options */
2975 //#define MBEDTLS_HMAC_DRBG_RESEED_INTERVAL   10000 /**< Interval before reseed is performed by default */
2976 //#define MBEDTLS_HMAC_DRBG_MAX_INPUT           256 /**< Maximum number of additional input bytes */
2977 //#define MBEDTLS_HMAC_DRBG_MAX_REQUEST        1024 /**< Maximum number of requested bytes per call */
2978 //#define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT      384 /**< Maximum size of (re)seed buffer */
2979 
2980 /* ECP options */
2981 //#define MBEDTLS_ECP_MAX_BITS             521 /**< Maximum bit size of groups */
2982 //#define MBEDTLS_ECP_WINDOW_SIZE            6 /**< Maximum window size used */
2983 //#define MBEDTLS_ECP_FIXED_POINT_OPTIM      1 /**< Enable fixed-point speed-up */
2984 
2985 /* Entropy options */
2986 //#define MBEDTLS_ENTROPY_MAX_SOURCES                20 /**< Maximum number of sources supported */
2987 #define MBEDTLS_ENTROPY_MAX_GATHER                   144 /**< Maximum amount requested from entropy sources */
2988 //#define MBEDTLS_ENTROPY_MIN_HARDWARE               32 /**< Default minimum number of bytes required for the hardware entropy source mbedtls_hardware_poll() before entropy is released */
2989 
2990 /* Memory buffer allocator options */
2991 //#define MBEDTLS_MEMORY_ALIGN_MULTIPLE      4 /**< Align on multiples of this value */
2992 
2993 /* Platform options */
2994 //#define MBEDTLS_PLATFORM_STD_MEM_HDR   <stdlib.h> /**< Header to include if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS is defined. Don't define if no header is needed. */
2995 //#define MBEDTLS_PLATFORM_STD_CALLOC        calloc /**< Default allocator to use, can be undefined */
2996 //#define MBEDTLS_PLATFORM_STD_FREE            free /**< Default free to use, can be undefined */
2997 
2998 //#define MBEDTLS_PLATFORM_STD_EXIT            exit /**< Default exit to use, can be undefined */
2999 //#define MBEDTLS_PLATFORM_STD_TIME            time /**< Default time to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
3000 //#define MBEDTLS_PLATFORM_STD_FPRINTF      fprintf /**< Default fprintf to use, can be undefined */
3001 //#define MBEDTLS_PLATFORM_STD_PRINTF        printf /**< Default printf to use, can be undefined */
3002 /* Note: your snprintf must correclty zero-terminate the buffer! */
3003 //#define MBEDTLS_PLATFORM_STD_SNPRINTF    snprintf /**< Default snprintf to use, can be undefined */
3004 //#define MBEDTLS_PLATFORM_STD_EXIT_SUCCESS       0 /**< Default exit value to use, can be undefined */
3005 //#define MBEDTLS_PLATFORM_STD_EXIT_FAILURE       1 /**< Default exit value to use, can be undefined */
3006 //#define MBEDTLS_PLATFORM_STD_NV_SEED_READ   mbedtls_platform_std_nv_seed_read /**< Default nv_seed_read function to use, can be undefined */
3007 //#define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE  mbedtls_platform_std_nv_seed_write /**< Default nv_seed_write function to use, can be undefined */
3008 //#define MBEDTLS_PLATFORM_STD_NV_SEED_FILE  "seedfile" /**< Seed file to read/write with default implementation */
3009 
3010 /* To Use Function Macros MBEDTLS_PLATFORM_C must be enabled */
3011 /* MBEDTLS_PLATFORM_XXX_MACRO and MBEDTLS_PLATFORM_XXX_ALT cannot both be defined */
3012 //#define MBEDTLS_PLATFORM_CALLOC_MACRO          calloc /**< Default allocator macro to use, can be undefined */
3013 //#define MBEDTLS_PLATFORM_FREE_MACRO            free /**< Default free macro to use, can be undefined */
3014 #define MBEDTLS_PLATFORM_EXIT_MACRO            exit /**< Default exit macro to use, can be undefined */
3015 //#define MBEDTLS_PLATFORM_TIME_MACRO            time /**< Default time macro to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
3016 //#define MBEDTLS_PLATFORM_TIME_TYPE_MACRO       time_t /**< Default time macro to use, can be undefined. MBEDTLS_HAVE_TIME must be enabled */
3017 #define MBEDTLS_PLATFORM_FPRINTF_MACRO      fprintf /**< Default fprintf macro to use, can be undefined */
3018 #define MBEDTLS_PLATFORM_PRINTF_MACRO        printf /**< Default printf macro to use, can be undefined */
3019 /* Note: your snprintf must correclty zero-terminate the buffer! */
3020 //#define MBEDTLS_PLATFORM_SNPRINTF_MACRO    snprintf /**< Default snprintf macro to use, can be undefined */
3021 //#define MBEDTLS_PLATFORM_NV_SEED_READ_MACRO   mbedtls_platform_std_nv_seed_read /**< Default nv_seed_read function to use, can be undefined */
3022 //#define MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO  mbedtls_platform_std_nv_seed_write /**< Default nv_seed_write function to use, can be undefined */
3023 
3024 /**
3025  * \brief       This macro is invoked by the library when an invalid parameter
3026  *              is detected that is only checked with MBEDTLS_CHECK_PARAMS
3027  *              (see the documentation of that option for context).
3028  *
3029  *              When you leave this undefined here, a default definition is
3030  *              provided that invokes the function mbedtls_param_failed(),
3031  *              which is declared in platform_util.h for the benefit of the
3032  *              library, but that you need to define in your application.
3033  *
3034  *              When you define this here, this replaces the default
3035  *              definition in platform_util.h (which no longer declares the
3036  *              function mbedtls_param_failed()) and it is your responsibility
3037  *              to make sure this macro expands to something suitable (in
3038  *              particular, that all the necessary declarations are visible
3039  *              from within the library - you can ensure that by providing
3040  *              them in this file next to the macro definition).
3041  *
3042  *              Note that you may define this macro to expand to nothing, in
3043  *              which case you don't have to worry about declarations or
3044  *              definitions. However, you will then be notified about invalid
3045  *              parameters only in non-void functions, and void function will
3046  *              just silently return early on invalid parameters, which
3047  *              partially negates the benefits of enabling
3048  *              #MBEDTLS_CHECK_PARAMS in the first place, so is discouraged.
3049  *
3050  * \param cond  The expression that should evaluate to true, but doesn't.
3051  */
3052 //#define MBEDTLS_PARAM_FAILED( cond )               assert( cond )
3053 
3054 /* SSL Cache options */
3055 //#define MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT       86400 /**< 1 day  */
3056 //#define MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES      50 /**< Maximum entries in cache */
3057 
3058 /* SSL options */
3059 
3060 /** \def MBEDTLS_SSL_MAX_CONTENT_LEN
3061  *
3062  * Maximum length (in bytes) of incoming and outgoing plaintext fragments.
3063  *
3064  * This determines the size of both the incoming and outgoing TLS I/O buffers
3065  * in such a way that both are capable of holding the specified amount of
3066  * plaintext data, regardless of the protection mechanism used.
3067  *
3068  * To configure incoming and outgoing I/O buffers separately, use
3069  * #MBEDTLS_SSL_IN_CONTENT_LEN and #MBEDTLS_SSL_OUT_CONTENT_LEN,
3070  * which overwrite the value set by this option.
3071  *
3072  * \note When using a value less than the default of 16KB on the client, it is
3073  *       recommended to use the Maximum Fragment Length (MFL) extension to
3074  *       inform the server about this limitation. On the server, there
3075  *       is no supported, standardized way of informing the client about
3076  *       restriction on the maximum size of incoming messages, and unless
3077  *       the limitation has been communicated by other means, it is recommended
3078  *       to only change the outgoing buffer size #MBEDTLS_SSL_OUT_CONTENT_LEN
3079  *       while keeping the default value of 16KB for the incoming buffer.
3080  *
3081  * Uncomment to set the maximum plaintext size of both
3082  * incoming and outgoing I/O buffers.
3083  */
3084 //#define MBEDTLS_SSL_MAX_CONTENT_LEN             16384
3085 
3086 /** \def MBEDTLS_SSL_IN_CONTENT_LEN
3087  *
3088  * Maximum length (in bytes) of incoming plaintext fragments.
3089  *
3090  * This determines the size of the incoming TLS I/O buffer in such a way
3091  * that it is capable of holding the specified amount of plaintext data,
3092  * regardless of the protection mechanism used.
3093  *
3094  * If this option is undefined, it inherits its value from
3095  * #MBEDTLS_SSL_MAX_CONTENT_LEN.
3096  *
3097  * \note When using a value less than the default of 16KB on the client, it is
3098  *       recommended to use the Maximum Fragment Length (MFL) extension to
3099  *       inform the server about this limitation. On the server, there
3100  *       is no supported, standardized way of informing the client about
3101  *       restriction on the maximum size of incoming messages, and unless
3102  *       the limitation has been communicated by other means, it is recommended
3103  *       to only change the outgoing buffer size #MBEDTLS_SSL_OUT_CONTENT_LEN
3104  *       while keeping the default value of 16KB for the incoming buffer.
3105  *
3106  * Uncomment to set the maximum plaintext size of the incoming I/O buffer
3107  * independently of the outgoing I/O buffer.
3108  */
3109 //#define MBEDTLS_SSL_IN_CONTENT_LEN              16384
3110 
3111 /** \def MBEDTLS_SSL_OUT_CONTENT_LEN
3112  *
3113  * Maximum length (in bytes) of outgoing plaintext fragments.
3114  *
3115  * This determines the size of the outgoing TLS I/O buffer in such a way
3116  * that it is capable of holding the specified amount of plaintext data,
3117  * regardless of the protection mechanism used.
3118  *
3119  * If this option undefined, it inherits its value from
3120  * #MBEDTLS_SSL_MAX_CONTENT_LEN.
3121  *
3122  * It is possible to save RAM by setting a smaller outward buffer, while keeping
3123  * the default inward 16384 byte buffer to conform to the TLS specification.
3124  *
3125  * The minimum required outward buffer size is determined by the handshake
3126  * protocol's usage. Handshaking will fail if the outward buffer is too small.
3127  * The specific size requirement depends on the configured ciphers and any
3128  * certificate data which is sent during the handshake.
3129  *
3130  * Uncomment to set the maximum plaintext size of the outgoing I/O buffer
3131  * independently of the incoming I/O buffer.
3132  */
3133 //#define MBEDTLS_SSL_OUT_CONTENT_LEN             16384
3134 
3135 /** \def MBEDTLS_SSL_DTLS_MAX_BUFFERING
3136  *
3137  * Maximum number of heap-allocated bytes for the purpose of
3138  * DTLS handshake message reassembly and future message buffering.
3139  *
3140  * This should be at least 9/8 * MBEDTLSSL_IN_CONTENT_LEN
3141  * to account for a reassembled handshake message of maximum size,
3142  * together with its reassembly bitmap.
3143  *
3144  * A value of 2 * MBEDTLS_SSL_IN_CONTENT_LEN (32768 by default)
3145  * should be sufficient for all practical situations as it allows
3146  * to reassembly a large handshake message (such as a certificate)
3147  * while buffering multiple smaller handshake messages.
3148  *
3149  */
3150 //#define MBEDTLS_SSL_DTLS_MAX_BUFFERING             32768
3151 
3152 //#define MBEDTLS_SSL_DEFAULT_TICKET_LIFETIME     86400 /**< Lifetime of session tickets (if enabled) */
3153 //#define MBEDTLS_PSK_MAX_LEN               32 /**< Max size of TLS pre-shared keys, in bytes (default 256 bits) */
3154 //#define MBEDTLS_SSL_COOKIE_TIMEOUT        60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */
3155 
3156 /**
3157  * Complete list of ciphersuites to use, in order of preference.
3158  *
3159  * \warning No dependency checking is done on that field! This option can only
3160  * be used to restrict the set of available ciphersuites. It is your
3161  * responsibility to make sure the needed modules are active.
3162  *
3163  * Use this to save a few hundred bytes of ROM (default ordering of all
3164  * available ciphersuites) and a few to a few hundred bytes of RAM.
3165  *
3166  * The value below is only an example, not the default.
3167  */
3168 //#define MBEDTLS_SSL_CIPHERSUITES MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
3169 
3170 /* X509 options */
3171 //#define MBEDTLS_X509_MAX_INTERMEDIATE_CA   8   /**< Maximum number of intermediate CAs in a verification chain. */
3172 //#define MBEDTLS_X509_MAX_FILE_PATH_LEN     512 /**< Maximum length of a path/filename string in bytes including the null terminator character ('\0'). */
3173 
3174 /**
3175  * Allow SHA-1 in the default TLS configuration for certificate signing.
3176  * Without this build-time option, SHA-1 support must be activated explicitly
3177  * through mbedtls_ssl_conf_cert_profile. Turning on this option is not
3178  * recommended because of it is possible to generate SHA-1 collisions, however
3179  * this may be safe for legacy infrastructure where additional controls apply.
3180  *
3181  * \warning   SHA-1 is considered a weak message digest and its use constitutes
3182  *            a security risk. If possible, we recommend avoiding dependencies
3183  *            on it, and considering stronger message digests instead.
3184  *
3185  */
3186 // #define MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
3187 
3188 /**
3189  * Allow SHA-1 in the default TLS configuration for TLS 1.2 handshake
3190  * signature and ciphersuite selection. Without this build-time option, SHA-1
3191  * support must be activated explicitly through mbedtls_ssl_conf_sig_hashes.
3192  * The use of SHA-1 in TLS <= 1.1 and in HMAC-SHA-1 is always allowed by
3193  * default. At the time of writing, there is no practical attack on the use
3194  * of SHA-1 in handshake signatures, hence this option is turned on by default
3195  * to preserve compatibility with existing peers, but the general
3196  * warning applies nonetheless:
3197  *
3198  * \warning   SHA-1 is considered a weak message digest and its use constitutes
3199  *            a security risk. If possible, we recommend avoiding dependencies
3200  *            on it, and considering stronger message digests instead.
3201  *
3202  */
3203 //#define MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE
3204 
3205 /**
3206  * Uncomment the macro to let mbed TLS use your alternate implementation of
3207  * mbedtls_platform_zeroize(). This replaces the default implementation in
3208  * platform_util.c.
3209  *
3210  * mbedtls_platform_zeroize() is a widely used function across the library to
3211  * zero a block of memory. The implementation is expected to be secure in the
3212  * sense that it has been written to prevent the compiler from removing calls
3213  * to mbedtls_platform_zeroize() as part of redundant code elimination
3214  * optimizations. However, it is difficult to guarantee that calls to
3215  * mbedtls_platform_zeroize() will not be optimized by the compiler as older
3216  * versions of the C language standards do not provide a secure implementation
3217  * of memset(). Therefore, MBEDTLS_PLATFORM_ZEROIZE_ALT enables users to
3218  * configure their own implementation of mbedtls_platform_zeroize(), for
3219  * example by using directives specific to their compiler, features from newer
3220  * C standards (e.g using memset_s() in C11) or calling a secure memset() from
3221  * their system (e.g explicit_bzero() in BSD).
3222  */
3223 //#define MBEDTLS_PLATFORM_ZEROIZE_ALT
3224 
3225 /**
3226  * Uncomment the macro to let Mbed TLS use your alternate implementation of
3227  * mbedtls_platform_gmtime_r(). This replaces the default implementation in
3228  * platform_util.c.
3229  *
3230  * gmtime() is not a thread-safe function as defined in the C standard. The
3231  * library will try to use safer implementations of this function, such as
3232  * gmtime_r() when available. However, if Mbed TLS cannot identify the target
3233  * system, the implementation of mbedtls_platform_gmtime_r() will default to
3234  * using the standard gmtime(). In this case, calls from the library to
3235  * gmtime() will be guarded by the global mutex mbedtls_threading_gmtime_mutex
3236  * if MBEDTLS_THREADING_C is enabled. We recommend that calls from outside the
3237  * library are also guarded with this mutex to avoid race conditions. However,
3238  * if the macro MBEDTLS_PLATFORM_GMTIME_R_ALT is defined, Mbed TLS will
3239  * unconditionally use the implementation for mbedtls_platform_gmtime_r()
3240  * supplied at compile time.
3241  */
3242 //#define MBEDTLS_PLATFORM_GMTIME_R_ALT
3243 
3244 /* \} name SECTION: Customisation configuration options */
3245 
3246 /*
3247  * Allow user to override any previous default.
3248  *
3249  * Use two macro names for that, as:
3250  * - with yotta the prefix YOTTA_CFG_ is forced
3251  * - without yotta is looks weird to have a YOTTA prefix.
3252  */
3253 #if defined(YOTTA_CFG_MBEDTLS_USER_CONFIG_FILE)
3254 #include YOTTA_CFG_MBEDTLS_USER_CONFIG_FILE
3255 #elif defined(MBEDTLS_USER_CONFIG_FILE)
3256 #include MBEDTLS_USER_CONFIG_FILE
3257 #endif
3258 
3259 #include "mbedtls/check_config.h"
3260 
3261 /* define memory related functions */
3262 #if !defined(DX_PLAT_MPS2_PLUS)
3263 //#include "no_os.h"
3264 #endif
3265 
3266 #endif /* MBEDTLS_CONFIG_H */
3267