1 /**
2 * \file x509.h
3 *
4 * \brief X.509 generic defines and structures
5 */
6 /*
7 * Copyright The Mbed TLS Contributors
8 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
9 */
10 #ifndef MBEDTLS_X509_H
11 #define MBEDTLS_X509_H
12 #include "mbedtls/private_access.h"
13
14 #include "mbedtls/build_info.h"
15
16 #include "mbedtls/asn1.h"
17 #include "mbedtls/pk.h"
18
19 #if defined(MBEDTLS_RSA_C)
20 #include "mbedtls/rsa.h"
21 #endif
22
23 /**
24 * \addtogroup x509_module
25 * \{
26 */
27
28 #if !defined(MBEDTLS_X509_MAX_INTERMEDIATE_CA)
29 /**
30 * Maximum number of intermediate CAs in a verification chain.
31 * That is, maximum length of the chain, excluding the end-entity certificate
32 * and the trusted root certificate.
33 *
34 * Set this to a low value to prevent an adversary from making you waste
35 * resources verifying an overlong certificate chain.
36 */
37 #define MBEDTLS_X509_MAX_INTERMEDIATE_CA 8
38 #endif
39
40 /**
41 * \name X509 Error codes
42 * \{
43 */
44 /** Unavailable feature, e.g. RSA hashing/encryption combination. */
45 #define MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE -0x2080
46 /** Requested OID is unknown. */
47 #define MBEDTLS_ERR_X509_UNKNOWN_OID -0x2100
48 /** The CRT/CRL/CSR format is invalid, e.g. different type expected. */
49 #define MBEDTLS_ERR_X509_INVALID_FORMAT -0x2180
50 /** The CRT/CRL/CSR version element is invalid. */
51 #define MBEDTLS_ERR_X509_INVALID_VERSION -0x2200
52 /** The serial tag or value is invalid. */
53 #define MBEDTLS_ERR_X509_INVALID_SERIAL -0x2280
54 /** The algorithm tag or value is invalid. */
55 #define MBEDTLS_ERR_X509_INVALID_ALG -0x2300
56 /** The name tag or value is invalid. */
57 #define MBEDTLS_ERR_X509_INVALID_NAME -0x2380
58 /** The date tag or value is invalid. */
59 #define MBEDTLS_ERR_X509_INVALID_DATE -0x2400
60 /** The signature tag or value invalid. */
61 #define MBEDTLS_ERR_X509_INVALID_SIGNATURE -0x2480
62 /** The extension tag or value is invalid. */
63 #define MBEDTLS_ERR_X509_INVALID_EXTENSIONS -0x2500
64 /** CRT/CRL/CSR has an unsupported version number. */
65 #define MBEDTLS_ERR_X509_UNKNOWN_VERSION -0x2580
66 /** Signature algorithm (oid) is unsupported. */
67 #define MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG -0x2600
68 /** Signature algorithms do not match. (see \c ::mbedtls_x509_crt sig_oid) */
69 #define MBEDTLS_ERR_X509_SIG_MISMATCH -0x2680
70 /** Certificate verification failed, e.g. CRL, CA or signature check failed. */
71 #define MBEDTLS_ERR_X509_CERT_VERIFY_FAILED -0x2700
72 /** Format not recognized as DER or PEM. */
73 #define MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT -0x2780
74 /** Input invalid. */
75 #define MBEDTLS_ERR_X509_BAD_INPUT_DATA -0x2800
76 /** Allocation of memory failed. */
77 #define MBEDTLS_ERR_X509_ALLOC_FAILED -0x2880
78 /** Read/write of file failed. */
79 #define MBEDTLS_ERR_X509_FILE_IO_ERROR -0x2900
80 /** Destination buffer is too small. */
81 #define MBEDTLS_ERR_X509_BUFFER_TOO_SMALL -0x2980
82 /** A fatal error occurred, eg the chain is too long or the vrfy callback failed. */
83 #define MBEDTLS_ERR_X509_FATAL_ERROR -0x3000
84 /** \} name X509 Error codes */
85
86 /**
87 * \name X509 Verify codes
88 * \{
89 */
90 /* Reminder: update x509_crt_verify_strings[] in library/x509_crt.c */
91 #define MBEDTLS_X509_BADCERT_EXPIRED 0x01 /**< The certificate validity has expired. */
92 #define MBEDTLS_X509_BADCERT_REVOKED 0x02 /**< The certificate has been revoked (is on a CRL). */
93 #define MBEDTLS_X509_BADCERT_CN_MISMATCH 0x04 /**< The certificate Common Name (CN) does not match with the expected CN. */
94 #define MBEDTLS_X509_BADCERT_NOT_TRUSTED 0x08 /**< The certificate is not correctly signed by the trusted CA. */
95 #define MBEDTLS_X509_BADCRL_NOT_TRUSTED 0x10 /**< The CRL is not correctly signed by the trusted CA. */
96 #define MBEDTLS_X509_BADCRL_EXPIRED 0x20 /**< The CRL is expired. */
97 #define MBEDTLS_X509_BADCERT_MISSING 0x40 /**< Certificate was missing. */
98 #define MBEDTLS_X509_BADCERT_SKIP_VERIFY 0x80 /**< Certificate verification was skipped. */
99 #define MBEDTLS_X509_BADCERT_OTHER 0x0100 /**< Other reason (can be used by verify callback) */
100 #define MBEDTLS_X509_BADCERT_FUTURE 0x0200 /**< The certificate validity starts in the future. */
101 #define MBEDTLS_X509_BADCRL_FUTURE 0x0400 /**< The CRL is from the future */
102 #define MBEDTLS_X509_BADCERT_KEY_USAGE 0x0800 /**< Usage does not match the keyUsage extension. */
103 #define MBEDTLS_X509_BADCERT_EXT_KEY_USAGE 0x1000 /**< Usage does not match the extendedKeyUsage extension. */
104 #define MBEDTLS_X509_BADCERT_NS_CERT_TYPE 0x2000 /**< Usage does not match the nsCertType extension. */
105 #define MBEDTLS_X509_BADCERT_BAD_MD 0x4000 /**< The certificate is signed with an unacceptable hash. */
106 #define MBEDTLS_X509_BADCERT_BAD_PK 0x8000 /**< The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
107 #define MBEDTLS_X509_BADCERT_BAD_KEY 0x010000 /**< The certificate is signed with an unacceptable key (eg bad curve, RSA too short). */
108 #define MBEDTLS_X509_BADCRL_BAD_MD 0x020000 /**< The CRL is signed with an unacceptable hash. */
109 #define MBEDTLS_X509_BADCRL_BAD_PK 0x040000 /**< The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
110 #define MBEDTLS_X509_BADCRL_BAD_KEY 0x080000 /**< The CRL is signed with an unacceptable key (eg bad curve, RSA too short). */
111
112 /** \} name X509 Verify codes */
113 /** \} addtogroup x509_module */
114
115 /*
116 * X.509 v3 Subject Alternative Name types.
117 * otherName [0] OtherName,
118 * rfc822Name [1] IA5String,
119 * dNSName [2] IA5String,
120 * x400Address [3] ORAddress,
121 * directoryName [4] Name,
122 * ediPartyName [5] EDIPartyName,
123 * uniformResourceIdentifier [6] IA5String,
124 * iPAddress [7] OCTET STRING,
125 * registeredID [8] OBJECT IDENTIFIER
126 */
127 #define MBEDTLS_X509_SAN_OTHER_NAME 0
128 #define MBEDTLS_X509_SAN_RFC822_NAME 1
129 #define MBEDTLS_X509_SAN_DNS_NAME 2
130 #define MBEDTLS_X509_SAN_X400_ADDRESS_NAME 3
131 #define MBEDTLS_X509_SAN_DIRECTORY_NAME 4
132 #define MBEDTLS_X509_SAN_EDI_PARTY_NAME 5
133 #define MBEDTLS_X509_SAN_UNIFORM_RESOURCE_IDENTIFIER 6
134 #define MBEDTLS_X509_SAN_IP_ADDRESS 7
135 #define MBEDTLS_X509_SAN_REGISTERED_ID 8
136
137 /*
138 * X.509 v3 Key Usage Extension flags
139 * Reminder: update mbedtls_x509_info_key_usage() when adding new flags.
140 */
141 #define MBEDTLS_X509_KU_DIGITAL_SIGNATURE (0x80) /* bit 0 */
142 #define MBEDTLS_X509_KU_NON_REPUDIATION (0x40) /* bit 1 */
143 #define MBEDTLS_X509_KU_KEY_ENCIPHERMENT (0x20) /* bit 2 */
144 #define MBEDTLS_X509_KU_DATA_ENCIPHERMENT (0x10) /* bit 3 */
145 #define MBEDTLS_X509_KU_KEY_AGREEMENT (0x08) /* bit 4 */
146 #define MBEDTLS_X509_KU_KEY_CERT_SIGN (0x04) /* bit 5 */
147 #define MBEDTLS_X509_KU_CRL_SIGN (0x02) /* bit 6 */
148 #define MBEDTLS_X509_KU_ENCIPHER_ONLY (0x01) /* bit 7 */
149 #define MBEDTLS_X509_KU_DECIPHER_ONLY (0x8000) /* bit 8 */
150
151 /*
152 * Netscape certificate types
153 * (http://www.mozilla.org/projects/security/pki/nss/tech-notes/tn3.html)
154 */
155
156 #define MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT (0x80) /* bit 0 */
157 #define MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER (0x40) /* bit 1 */
158 #define MBEDTLS_X509_NS_CERT_TYPE_EMAIL (0x20) /* bit 2 */
159 #define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING (0x10) /* bit 3 */
160 #define MBEDTLS_X509_NS_CERT_TYPE_RESERVED (0x08) /* bit 4 */
161 #define MBEDTLS_X509_NS_CERT_TYPE_SSL_CA (0x04) /* bit 5 */
162 #define MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA (0x02) /* bit 6 */
163 #define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA (0x01) /* bit 7 */
164
165 /*
166 * X.509 extension types
167 *
168 * Comments refer to the status for using certificates. Status can be
169 * different for writing certificates or reading CRLs or CSRs.
170 *
171 * Those are defined in oid.h as oid.c needs them in a data structure. Since
172 * these were previously defined here, let's have aliases for compatibility.
173 */
174 #define MBEDTLS_X509_EXT_AUTHORITY_KEY_IDENTIFIER MBEDTLS_OID_X509_EXT_AUTHORITY_KEY_IDENTIFIER
175 #define MBEDTLS_X509_EXT_SUBJECT_KEY_IDENTIFIER MBEDTLS_OID_X509_EXT_SUBJECT_KEY_IDENTIFIER
176 #define MBEDTLS_X509_EXT_KEY_USAGE MBEDTLS_OID_X509_EXT_KEY_USAGE
177 #define MBEDTLS_X509_EXT_CERTIFICATE_POLICIES MBEDTLS_OID_X509_EXT_CERTIFICATE_POLICIES
178 #define MBEDTLS_X509_EXT_POLICY_MAPPINGS MBEDTLS_OID_X509_EXT_POLICY_MAPPINGS
179 #define MBEDTLS_X509_EXT_SUBJECT_ALT_NAME MBEDTLS_OID_X509_EXT_SUBJECT_ALT_NAME /* Supported (DNS) */
180 #define MBEDTLS_X509_EXT_ISSUER_ALT_NAME MBEDTLS_OID_X509_EXT_ISSUER_ALT_NAME
181 #define MBEDTLS_X509_EXT_SUBJECT_DIRECTORY_ATTRS MBEDTLS_OID_X509_EXT_SUBJECT_DIRECTORY_ATTRS
182 #define MBEDTLS_X509_EXT_BASIC_CONSTRAINTS MBEDTLS_OID_X509_EXT_BASIC_CONSTRAINTS /* Supported */
183 #define MBEDTLS_X509_EXT_NAME_CONSTRAINTS MBEDTLS_OID_X509_EXT_NAME_CONSTRAINTS
184 #define MBEDTLS_X509_EXT_POLICY_CONSTRAINTS MBEDTLS_OID_X509_EXT_POLICY_CONSTRAINTS
185 #define MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE MBEDTLS_OID_X509_EXT_EXTENDED_KEY_USAGE
186 #define MBEDTLS_X509_EXT_CRL_DISTRIBUTION_POINTS MBEDTLS_OID_X509_EXT_CRL_DISTRIBUTION_POINTS
187 #define MBEDTLS_X509_EXT_INIHIBIT_ANYPOLICY MBEDTLS_OID_X509_EXT_INIHIBIT_ANYPOLICY
188 #define MBEDTLS_X509_EXT_FRESHEST_CRL MBEDTLS_OID_X509_EXT_FRESHEST_CRL
189 #define MBEDTLS_X509_EXT_NS_CERT_TYPE MBEDTLS_OID_X509_EXT_NS_CERT_TYPE
190
191 /*
192 * Storage format identifiers
193 * Recognized formats: PEM and DER
194 */
195 #define MBEDTLS_X509_FORMAT_DER 1
196 #define MBEDTLS_X509_FORMAT_PEM 2
197
198 #define MBEDTLS_X509_MAX_DN_NAME_SIZE 256 /**< Maximum value size of a DN entry */
199
200 #ifdef __cplusplus
201 extern "C" {
202 #endif
203
204 /**
205 * \addtogroup x509_module
206 * \{ */
207
208 /**
209 * \name Structures for parsing X.509 certificates, CRLs and CSRs
210 * \{
211 */
212
213 /**
214 * Type-length-value structure that allows for ASN1 using DER.
215 */
216 typedef mbedtls_asn1_buf mbedtls_x509_buf;
217
218 /**
219 * Container for ASN1 bit strings.
220 */
221 typedef mbedtls_asn1_bitstring mbedtls_x509_bitstring;
222
223 /**
224 * Container for ASN1 named information objects.
225 * It allows for Relative Distinguished Names (e.g. cn=localhost,ou=code,etc.).
226 */
227 typedef mbedtls_asn1_named_data mbedtls_x509_name;
228
229 /**
230 * Container for a sequence of ASN.1 items
231 */
232 typedef mbedtls_asn1_sequence mbedtls_x509_sequence;
233
234 /*
235 * Container for the fields of the Authority Key Identifier object
236 */
237 typedef struct mbedtls_x509_authority {
238 mbedtls_x509_buf keyIdentifier;
239 mbedtls_x509_sequence authorityCertIssuer;
240 mbedtls_x509_buf authorityCertSerialNumber;
241 mbedtls_x509_buf raw;
242 }
243 mbedtls_x509_authority;
244
245 /** Container for date and time (precision in seconds). */
246 typedef struct mbedtls_x509_time {
247 int year, mon, day; /**< Date. */
248 int hour, min, sec; /**< Time. */
249 }
250 mbedtls_x509_time;
251
252 /**
253 * From RFC 5280 section 4.2.1.6:
254 * OtherName ::= SEQUENCE {
255 * type-id OBJECT IDENTIFIER,
256 * value [0] EXPLICIT ANY DEFINED BY type-id }
257 *
258 * Future versions of the library may add new fields to this structure or
259 * to its embedded union and structure.
260 */
261 typedef struct mbedtls_x509_san_other_name {
262 /**
263 * The type_id is an OID as defined in RFC 5280.
264 * To check the value of the type id, you should use
265 * \p MBEDTLS_OID_CMP with a known OID mbedtls_x509_buf.
266 */
267 mbedtls_x509_buf type_id; /**< The type id. */
268 union {
269 /**
270 * From RFC 4108 section 5:
271 * HardwareModuleName ::= SEQUENCE {
272 * hwType OBJECT IDENTIFIER,
273 * hwSerialNum OCTET STRING }
274 */
275 struct {
276 mbedtls_x509_buf oid; /**< The object identifier. */
277 mbedtls_x509_buf val; /**< The named value. */
278 }
279 hardware_module_name;
280 }
281 value;
282 }
283 mbedtls_x509_san_other_name;
284
285 /**
286 * A structure for holding the parsed Subject Alternative Name,
287 * according to type.
288 *
289 * Future versions of the library may add new fields to this structure or
290 * to its embedded union and structure.
291 */
292 typedef struct mbedtls_x509_subject_alternative_name {
293 int type; /**< The SAN type, value of MBEDTLS_X509_SAN_XXX. */
294 union {
295 mbedtls_x509_san_other_name other_name;
296 mbedtls_x509_name directory_name;
297 mbedtls_x509_buf unstructured_name; /**< The buffer for the unstructured types. rfc822Name, dnsName and uniformResourceIdentifier are currently supported. */
298 }
299 san; /**< A union of the supported SAN types */
300 }
301 mbedtls_x509_subject_alternative_name;
302
303 typedef struct mbedtls_x509_san_list {
304 mbedtls_x509_subject_alternative_name node;
305 struct mbedtls_x509_san_list *next;
306 }
307 mbedtls_x509_san_list;
308
309 /** \} name Structures for parsing X.509 certificates, CRLs and CSRs */
310
311 /**
312 * \brief Store the certificate DN in printable form into buf;
313 * no more than size characters will be written.
314 *
315 * \param buf Buffer to write to
316 * \param size Maximum size of buffer
317 * \param dn The X509 name to represent
318 *
319 * \return The length of the string written (not including the
320 * terminated nul byte), or a negative error code.
321 */
322 int mbedtls_x509_dn_gets(char *buf, size_t size, const mbedtls_x509_name *dn);
323
324 /**
325 * \brief Return the next relative DN in an X509 name.
326 *
327 * \note Intended use is to compare function result to dn->next
328 * in order to detect boundaries of multi-valued RDNs.
329 *
330 * \param dn Current node in the X509 name
331 *
332 * \return Pointer to the first attribute-value pair of the
333 * next RDN in sequence, or NULL if end is reached.
334 */
mbedtls_x509_dn_get_next(mbedtls_x509_name * dn)335 static inline mbedtls_x509_name *mbedtls_x509_dn_get_next(
336 mbedtls_x509_name *dn)
337 {
338 while (dn->MBEDTLS_PRIVATE(next_merged) && dn->next != NULL) {
339 dn = dn->next;
340 }
341 return dn->next;
342 }
343
344 /**
345 * \brief Store the certificate serial in printable form into buf;
346 * no more than size characters will be written.
347 *
348 * \param buf Buffer to write to
349 * \param size Maximum size of buffer
350 * \param serial The X509 serial to represent
351 *
352 * \return The length of the string written (not including the
353 * terminated nul byte), or a negative error code.
354 */
355 int mbedtls_x509_serial_gets(char *buf, size_t size, const mbedtls_x509_buf *serial);
356
357 /**
358 * \brief Compare pair of mbedtls_x509_time.
359 *
360 * \param t1 mbedtls_x509_time to compare
361 * \param t2 mbedtls_x509_time to compare
362 *
363 * \return < 0 if t1 is before t2
364 * 0 if t1 equals t2
365 * > 0 if t1 is after t2
366 */
367 int mbedtls_x509_time_cmp(const mbedtls_x509_time *t1, const mbedtls_x509_time *t2);
368
369 #if defined(MBEDTLS_HAVE_TIME_DATE)
370 /**
371 * \brief Fill mbedtls_x509_time with provided mbedtls_time_t.
372 *
373 * \param tt mbedtls_time_t to convert
374 * \param now mbedtls_x509_time to fill with converted mbedtls_time_t
375 *
376 * \return \c 0 on success
377 * \return A non-zero return value on failure.
378 */
379 int mbedtls_x509_time_gmtime(mbedtls_time_t tt, mbedtls_x509_time *now);
380 #endif /* MBEDTLS_HAVE_TIME_DATE */
381
382 /**
383 * \brief Check a given mbedtls_x509_time against the system time
384 * and tell if it's in the past.
385 *
386 * \note Intended usage is "if( is_past( valid_to ) ) ERROR".
387 * Hence the return value of 1 if on internal errors.
388 *
389 * \param to mbedtls_x509_time to check
390 *
391 * \return 1 if the given time is in the past or an error occurred,
392 * 0 otherwise.
393 */
394 int mbedtls_x509_time_is_past(const mbedtls_x509_time *to);
395
396 /**
397 * \brief Check a given mbedtls_x509_time against the system time
398 * and tell if it's in the future.
399 *
400 * \note Intended usage is "if( is_future( valid_from ) ) ERROR".
401 * Hence the return value of 1 if on internal errors.
402 *
403 * \param from mbedtls_x509_time to check
404 *
405 * \return 1 if the given time is in the future or an error occurred,
406 * 0 otherwise.
407 */
408 int mbedtls_x509_time_is_future(const mbedtls_x509_time *from);
409
410 /**
411 * \brief This function parses an item in the SubjectAlternativeNames
412 * extension. Please note that this function might allocate
413 * additional memory for a subject alternative name, thus
414 * mbedtls_x509_free_subject_alt_name has to be called
415 * to dispose of this additional memory afterwards.
416 *
417 * \param san_buf The buffer holding the raw data item of the subject
418 * alternative name.
419 * \param san The target structure to populate with the parsed presentation
420 * of the subject alternative name encoded in \p san_buf.
421 *
422 * \note Supported GeneralName types, as defined in RFC 5280:
423 * "rfc822Name", "dnsName", "directoryName",
424 * "uniformResourceIdentifier" and "hardware_module_name"
425 * of type "otherName", as defined in RFC 4108.
426 *
427 * \note This function should be called on a single raw data of
428 * subject alternative name. For example, after successful
429 * certificate parsing, one must iterate on every item in the
430 * \c crt->subject_alt_names sequence, and pass it to
431 * this function.
432 *
433 * \warning The target structure contains pointers to the raw data of the
434 * parsed certificate, and its lifetime is restricted by the
435 * lifetime of the certificate.
436 *
437 * \return \c 0 on success
438 * \return #MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE for an unsupported
439 * SAN type.
440 * \return Another negative value for any other failure.
441 */
442 int mbedtls_x509_parse_subject_alt_name(const mbedtls_x509_buf *san_buf,
443 mbedtls_x509_subject_alternative_name *san);
444 /**
445 * \brief Unallocate all data related to subject alternative name
446 *
447 * \param san SAN structure - extra memory owned by this structure will be freed
448 */
449 void mbedtls_x509_free_subject_alt_name(mbedtls_x509_subject_alternative_name *san);
450
451 /** \} addtogroup x509_module */
452
453 /*
454 * Internal module functions. You probably do not want to use these unless you
455 * know you do.
456 */
457 int mbedtls_x509_get_name(unsigned char **p, const unsigned char *end,
458 mbedtls_x509_name *cur);
459 int mbedtls_x509_get_alg_null(unsigned char **p, const unsigned char *end,
460 mbedtls_x509_buf *alg);
461 int mbedtls_x509_get_alg(unsigned char **p, const unsigned char *end,
462 mbedtls_x509_buf *alg, mbedtls_x509_buf *params);
463 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
464 int mbedtls_x509_get_rsassa_pss_params(const mbedtls_x509_buf *params,
465 mbedtls_md_type_t *md_alg, mbedtls_md_type_t *mgf_md,
466 int *salt_len);
467 #endif
468 int mbedtls_x509_get_sig(unsigned char **p, const unsigned char *end, mbedtls_x509_buf *sig);
469 int mbedtls_x509_get_sig_alg(const mbedtls_x509_buf *sig_oid, const mbedtls_x509_buf *sig_params,
470 mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg,
471 void **sig_opts);
472 int mbedtls_x509_get_time(unsigned char **p, const unsigned char *end,
473 mbedtls_x509_time *t);
474 int mbedtls_x509_get_serial(unsigned char **p, const unsigned char *end,
475 mbedtls_x509_buf *serial);
476 int mbedtls_x509_get_ext(unsigned char **p, const unsigned char *end,
477 mbedtls_x509_buf *ext, int tag);
478 #if !defined(MBEDTLS_X509_REMOVE_INFO)
479 int mbedtls_x509_sig_alg_gets(char *buf, size_t size, const mbedtls_x509_buf *sig_oid,
480 mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg,
481 const void *sig_opts);
482 #endif
483 int mbedtls_x509_key_size_helper(char *buf, size_t buf_size, const char *name);
484 int mbedtls_x509_string_to_names(mbedtls_asn1_named_data **head, const char *name);
485 int mbedtls_x509_set_extension(mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
486 int critical, const unsigned char *val,
487 size_t val_len);
488 int mbedtls_x509_write_extensions(unsigned char **p, unsigned char *start,
489 mbedtls_asn1_named_data *first);
490 int mbedtls_x509_write_names(unsigned char **p, unsigned char *start,
491 mbedtls_asn1_named_data *first);
492 int mbedtls_x509_write_sig(unsigned char **p, unsigned char *start,
493 const char *oid, size_t oid_len,
494 unsigned char *sig, size_t size,
495 mbedtls_pk_type_t pk_alg);
496 int mbedtls_x509_get_ns_cert_type(unsigned char **p,
497 const unsigned char *end,
498 unsigned char *ns_cert_type);
499 int mbedtls_x509_get_key_usage(unsigned char **p,
500 const unsigned char *end,
501 unsigned int *key_usage);
502 int mbedtls_x509_get_subject_alt_name(unsigned char **p,
503 const unsigned char *end,
504 mbedtls_x509_sequence *subject_alt_name);
505 int mbedtls_x509_get_subject_alt_name_ext(unsigned char **p,
506 const unsigned char *end,
507 mbedtls_x509_sequence *subject_alt_name);
508 int mbedtls_x509_info_subject_alt_name(char **buf, size_t *size,
509 const mbedtls_x509_sequence
510 *subject_alt_name,
511 const char *prefix);
512 int mbedtls_x509_info_cert_type(char **buf, size_t *size,
513 unsigned char ns_cert_type);
514 int mbedtls_x509_info_key_usage(char **buf, size_t *size,
515 unsigned int key_usage);
516
517 int mbedtls_x509_write_set_san_common(mbedtls_asn1_named_data **extensions,
518 const mbedtls_x509_san_list *san_list);
519
520 /**
521 * \brief This function parses a CN string as an IP address.
522 *
523 * \param cn The CN string to parse. CN string MUST be null-terminated.
524 * \param dst The target buffer to populate with the binary IP address.
525 * The buffer MUST be 16 bytes to save IPv6, and should be
526 * 4-byte aligned if the result will be used as struct in_addr.
527 * e.g. uint32_t dst[4]
528 *
529 * \note \p cn is parsed as an IPv6 address if string contains ':',
530 * else \p cn is parsed as an IPv4 address.
531 *
532 * \return Length of binary IP address; num bytes written to target.
533 * \return \c 0 on failure to parse CN string as an IP address.
534 */
535 size_t mbedtls_x509_crt_parse_cn_inet_pton(const char *cn, void *dst);
536
537 #define MBEDTLS_X509_SAFE_SNPRINTF \
538 do { \
539 if (ret < 0 || (size_t) ret >= n) \
540 return MBEDTLS_ERR_X509_BUFFER_TOO_SMALL; \
541 \
542 n -= (size_t) ret; \
543 p += (size_t) ret; \
544 } while (0)
545
546 #ifdef __cplusplus
547 }
548 #endif
549
550 #endif /* x509.h */
551
