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[proxmark3-svn] / common / mbedtls / x509_crl.c
1 /*
2 * X.509 Certidicate Revocation List (CRL) parsing
3 *
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: GPL-2.0
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * This file is part of mbed TLS (https://tls.mbed.org)
22 */
23 /*
24 * The ITU-T X.509 standard defines a certificate format for PKI.
25 *
26 * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
27 * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
28 * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
29 *
30 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
31 * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
32 */
33
34 #if !defined(MBEDTLS_CONFIG_FILE)
35 #include "mbedtls/config.h"
36 #else
37 #include MBEDTLS_CONFIG_FILE
38 #endif
39
40 #if defined(MBEDTLS_X509_CRL_PARSE_C)
41
42 #include "mbedtls/x509_crl.h"
43 #include "mbedtls/oid.h"
44 #include "mbedtls/platform_util.h"
45
46 #include <string.h>
47
48 #if defined(MBEDTLS_PEM_PARSE_C)
49 #include "mbedtls/pem.h"
50 #endif
51
52 #if defined(MBEDTLS_PLATFORM_C)
53 #include "mbedtls/platform.h"
54 #else
55 #include <stdlib.h>
56 #include <stdio.h>
57 #define mbedtls_free free
58 #define mbedtls_calloc calloc
59 #define mbedtls_snprintf snprintf
60 #endif
61
62 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
63 #include <windows.h>
64 #else
65 #include <time.h>
66 #endif
67
68 #if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
69 #include <stdio.h>
70 #endif
71
72 /*
73 * Version ::= INTEGER { v1(0), v2(1) }
74 */
75 static int x509_crl_get_version( unsigned char **p,
76 const unsigned char *end,
77 int *ver )
78 {
79 int ret;
80
81 if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
82 {
83 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
84 {
85 *ver = 0;
86 return( 0 );
87 }
88
89 return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
90 }
91
92 return( 0 );
93 }
94
95 /*
96 * X.509 CRL v2 extensions
97 *
98 * We currently don't parse any extension's content, but we do check that the
99 * list of extensions is well-formed and abort on critical extensions (that
100 * are unsupported as we don't support any extension so far)
101 */
102 static int x509_get_crl_ext( unsigned char **p,
103 const unsigned char *end,
104 mbedtls_x509_buf *ext )
105 {
106 int ret;
107
108 /*
109 * crlExtensions [0] EXPLICIT Extensions OPTIONAL
110 * -- if present, version MUST be v2
111 */
112 if( ( ret = mbedtls_x509_get_ext( p, end, ext, 0 ) ) != 0 )
113 {
114 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
115 return( 0 );
116
117 return( ret );
118 }
119
120 while( *p < end )
121 {
122 /*
123 * Extension ::= SEQUENCE {
124 * extnID OBJECT IDENTIFIER,
125 * critical BOOLEAN DEFAULT FALSE,
126 * extnValue OCTET STRING }
127 */
128 int is_critical = 0;
129 const unsigned char *end_ext_data;
130 size_t len;
131
132 /* Get enclosing sequence tag */
133 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
134 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
135 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
136
137 end_ext_data = *p + len;
138
139 /* Get OID (currently ignored) */
140 if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
141 MBEDTLS_ASN1_OID ) ) != 0 )
142 {
143 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
144 }
145 *p += len;
146
147 /* Get optional critical */
148 if( ( ret = mbedtls_asn1_get_bool( p, end_ext_data,
149 &is_critical ) ) != 0 &&
150 ( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) )
151 {
152 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
153 }
154
155 /* Data should be octet string type */
156 if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
157 MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
158 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
159
160 /* Ignore data so far and just check its length */
161 *p += len;
162 if( *p != end_ext_data )
163 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
164 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
165
166 /* Abort on (unsupported) critical extensions */
167 if( is_critical )
168 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
169 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
170 }
171
172 if( *p != end )
173 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
174 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
175
176 return( 0 );
177 }
178
179 /*
180 * X.509 CRL v2 entry extensions (no extensions parsed yet.)
181 */
182 static int x509_get_crl_entry_ext( unsigned char **p,
183 const unsigned char *end,
184 mbedtls_x509_buf *ext )
185 {
186 int ret;
187 size_t len = 0;
188
189 /* OPTIONAL */
190 if( end <= *p )
191 return( 0 );
192
193 ext->tag = **p;
194 ext->p = *p;
195
196 /*
197 * Get CRL-entry extension sequence header
198 * crlEntryExtensions Extensions OPTIONAL -- if present, MUST be v2
199 */
200 if( ( ret = mbedtls_asn1_get_tag( p, end, &ext->len,
201 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
202 {
203 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
204 {
205 ext->p = NULL;
206 return( 0 );
207 }
208 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
209 }
210
211 end = *p + ext->len;
212
213 if( end != *p + ext->len )
214 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
215 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
216
217 while( *p < end )
218 {
219 if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
220 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
221 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
222
223 *p += len;
224 }
225
226 if( *p != end )
227 return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
228 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
229
230 return( 0 );
231 }
232
233 /*
234 * X.509 CRL Entries
235 */
236 static int x509_get_entries( unsigned char **p,
237 const unsigned char *end,
238 mbedtls_x509_crl_entry *entry )
239 {
240 int ret;
241 size_t entry_len;
242 mbedtls_x509_crl_entry *cur_entry = entry;
243
244 if( *p == end )
245 return( 0 );
246
247 if( ( ret = mbedtls_asn1_get_tag( p, end, &entry_len,
248 MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 )
249 {
250 if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
251 return( 0 );
252
253 return( ret );
254 }
255
256 end = *p + entry_len;
257
258 while( *p < end )
259 {
260 size_t len2;
261 const unsigned char *end2;
262
263 if( ( ret = mbedtls_asn1_get_tag( p, end, &len2,
264 MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 )
265 {
266 return( ret );
267 }
268
269 cur_entry->raw.tag = **p;
270 cur_entry->raw.p = *p;
271 cur_entry->raw.len = len2;
272 end2 = *p + len2;
273
274 if( ( ret = mbedtls_x509_get_serial( p, end2, &cur_entry->serial ) ) != 0 )
275 return( ret );
276
277 if( ( ret = mbedtls_x509_get_time( p, end2,
278 &cur_entry->revocation_date ) ) != 0 )
279 return( ret );
280
281 if( ( ret = x509_get_crl_entry_ext( p, end2,
282 &cur_entry->entry_ext ) ) != 0 )
283 return( ret );
284
285 if( *p < end )
286 {
287 cur_entry->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl_entry ) );
288
289 if( cur_entry->next == NULL )
290 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
291
292 cur_entry = cur_entry->next;
293 }
294 }
295
296 return( 0 );
297 }
298
299 /*
300 * Parse one CRLs in DER format and append it to the chained list
301 */
302 int mbedtls_x509_crl_parse_der( mbedtls_x509_crl *chain,
303 const unsigned char *buf, size_t buflen )
304 {
305 int ret;
306 size_t len;
307 unsigned char *p = NULL, *end = NULL;
308 mbedtls_x509_buf sig_params1, sig_params2, sig_oid2;
309 mbedtls_x509_crl *crl = chain;
310
311 /*
312 * Check for valid input
313 */
314 if( crl == NULL || buf == NULL )
315 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
316
317 memset( &sig_params1, 0, sizeof( mbedtls_x509_buf ) );
318 memset( &sig_params2, 0, sizeof( mbedtls_x509_buf ) );
319 memset( &sig_oid2, 0, sizeof( mbedtls_x509_buf ) );
320
321 /*
322 * Add new CRL on the end of the chain if needed.
323 */
324 while( crl->version != 0 && crl->next != NULL )
325 crl = crl->next;
326
327 if( crl->version != 0 && crl->next == NULL )
328 {
329 crl->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl ) );
330
331 if( crl->next == NULL )
332 {
333 mbedtls_x509_crl_free( crl );
334 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
335 }
336
337 mbedtls_x509_crl_init( crl->next );
338 crl = crl->next;
339 }
340
341 /*
342 * Copy raw DER-encoded CRL
343 */
344 if( buflen == 0 )
345 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
346
347 p = mbedtls_calloc( 1, buflen );
348 if( p == NULL )
349 return( MBEDTLS_ERR_X509_ALLOC_FAILED );
350
351 memcpy( p, buf, buflen );
352
353 crl->raw.p = p;
354 crl->raw.len = buflen;
355
356 end = p + buflen;
357
358 /*
359 * CertificateList ::= SEQUENCE {
360 * tbsCertList TBSCertList,
361 * signatureAlgorithm AlgorithmIdentifier,
362 * signatureValue BIT STRING }
363 */
364 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
365 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
366 {
367 mbedtls_x509_crl_free( crl );
368 return( MBEDTLS_ERR_X509_INVALID_FORMAT );
369 }
370
371 if( len != (size_t) ( end - p ) )
372 {
373 mbedtls_x509_crl_free( crl );
374 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
375 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
376 }
377
378 /*
379 * TBSCertList ::= SEQUENCE {
380 */
381 crl->tbs.p = p;
382
383 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
384 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
385 {
386 mbedtls_x509_crl_free( crl );
387 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
388 }
389
390 end = p + len;
391 crl->tbs.len = end - crl->tbs.p;
392
393 /*
394 * Version ::= INTEGER OPTIONAL { v1(0), v2(1) }
395 * -- if present, MUST be v2
396 *
397 * signature AlgorithmIdentifier
398 */
399 if( ( ret = x509_crl_get_version( &p, end, &crl->version ) ) != 0 ||
400 ( ret = mbedtls_x509_get_alg( &p, end, &crl->sig_oid, &sig_params1 ) ) != 0 )
401 {
402 mbedtls_x509_crl_free( crl );
403 return( ret );
404 }
405
406 if( crl->version < 0 || crl->version > 1 )
407 {
408 mbedtls_x509_crl_free( crl );
409 return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
410 }
411
412 crl->version++;
413
414 if( ( ret = mbedtls_x509_get_sig_alg( &crl->sig_oid, &sig_params1,
415 &crl->sig_md, &crl->sig_pk,
416 &crl->sig_opts ) ) != 0 )
417 {
418 mbedtls_x509_crl_free( crl );
419 return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
420 }
421
422 /*
423 * issuer Name
424 */
425 crl->issuer_raw.p = p;
426
427 if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
428 MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
429 {
430 mbedtls_x509_crl_free( crl );
431 return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
432 }
433
434 if( ( ret = mbedtls_x509_get_name( &p, p + len, &crl->issuer ) ) != 0 )
435 {
436 mbedtls_x509_crl_free( crl );
437 return( ret );
438 }
439
440 crl->issuer_raw.len = p - crl->issuer_raw.p;
441
442 /*
443 * thisUpdate Time
444 * nextUpdate Time OPTIONAL
445 */
446 if( ( ret = mbedtls_x509_get_time( &p, end, &crl->this_update ) ) != 0 )
447 {
448 mbedtls_x509_crl_free( crl );
449 return( ret );
450 }
451
452 if( ( ret = mbedtls_x509_get_time( &p, end, &crl->next_update ) ) != 0 )
453 {
454 if( ret != ( MBEDTLS_ERR_X509_INVALID_DATE +
455 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) &&
456 ret != ( MBEDTLS_ERR_X509_INVALID_DATE +
457 MBEDTLS_ERR_ASN1_OUT_OF_DATA ) )
458 {
459 mbedtls_x509_crl_free( crl );
460 return( ret );
461 }
462 }
463
464 /*
465 * revokedCertificates SEQUENCE OF SEQUENCE {
466 * userCertificate CertificateSerialNumber,
467 * revocationDate Time,
468 * crlEntryExtensions Extensions OPTIONAL
469 * -- if present, MUST be v2
470 * } OPTIONAL
471 */
472 if( ( ret = x509_get_entries( &p, end, &crl->entry ) ) != 0 )
473 {
474 mbedtls_x509_crl_free( crl );
475 return( ret );
476 }
477
478 /*
479 * crlExtensions EXPLICIT Extensions OPTIONAL
480 * -- if present, MUST be v2
481 */
482 if( crl->version == 2 )
483 {
484 ret = x509_get_crl_ext( &p, end, &crl->crl_ext );
485
486 if( ret != 0 )
487 {
488 mbedtls_x509_crl_free( crl );
489 return( ret );
490 }
491 }
492
493 if( p != end )
494 {
495 mbedtls_x509_crl_free( crl );
496 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
497 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
498 }
499
500 end = crl->raw.p + crl->raw.len;
501
502 /*
503 * signatureAlgorithm AlgorithmIdentifier,
504 * signatureValue BIT STRING
505 */
506 if( ( ret = mbedtls_x509_get_alg( &p, end, &sig_oid2, &sig_params2 ) ) != 0 )
507 {
508 mbedtls_x509_crl_free( crl );
509 return( ret );
510 }
511
512 if( crl->sig_oid.len != sig_oid2.len ||
513 memcmp( crl->sig_oid.p, sig_oid2.p, crl->sig_oid.len ) != 0 ||
514 sig_params1.len != sig_params2.len ||
515 ( sig_params1.len != 0 &&
516 memcmp( sig_params1.p, sig_params2.p, sig_params1.len ) != 0 ) )
517 {
518 mbedtls_x509_crl_free( crl );
519 return( MBEDTLS_ERR_X509_SIG_MISMATCH );
520 }
521
522 if( ( ret = mbedtls_x509_get_sig( &p, end, &crl->sig ) ) != 0 )
523 {
524 mbedtls_x509_crl_free( crl );
525 return( ret );
526 }
527
528 if( p != end )
529 {
530 mbedtls_x509_crl_free( crl );
531 return( MBEDTLS_ERR_X509_INVALID_FORMAT +
532 MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
533 }
534
535 return( 0 );
536 }
537
538 /*
539 * Parse one or more CRLs and add them to the chained list
540 */
541 int mbedtls_x509_crl_parse( mbedtls_x509_crl *chain, const unsigned char *buf, size_t buflen )
542 {
543 #if defined(MBEDTLS_PEM_PARSE_C)
544 int ret;
545 size_t use_len;
546 mbedtls_pem_context pem;
547 int is_pem = 0;
548
549 if( chain == NULL || buf == NULL )
550 return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
551
552 do
553 {
554 mbedtls_pem_init( &pem );
555
556 // Avoid calling mbedtls_pem_read_buffer() on non-null-terminated
557 // string
558 if( buflen == 0 || buf[buflen - 1] != '\0' )
559 ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
560 else
561 ret = mbedtls_pem_read_buffer( &pem,
562 "-----BEGIN X509 CRL-----",
563 "-----END X509 CRL-----",
564 buf, NULL, 0, &use_len );
565
566 if( ret == 0 )
567 {
568 /*
569 * Was PEM encoded
570 */
571 is_pem = 1;
572
573 buflen -= use_len;
574 buf += use_len;
575
576 if( ( ret = mbedtls_x509_crl_parse_der( chain,
577 pem.buf, pem.buflen ) ) != 0 )
578 {
579 mbedtls_pem_free( &pem );
580 return( ret );
581 }
582 }
583 else if( is_pem )
584 {
585 mbedtls_pem_free( &pem );
586 return( ret );
587 }
588
589 mbedtls_pem_free( &pem );
590 }
591 /* In the PEM case, buflen is 1 at the end, for the terminated NULL byte.
592 * And a valid CRL cannot be less than 1 byte anyway. */
593 while( is_pem && buflen > 1 );
594
595 if( is_pem )
596 return( 0 );
597 else
598 #endif /* MBEDTLS_PEM_PARSE_C */
599 return( mbedtls_x509_crl_parse_der( chain, buf, buflen ) );
600 }
601
602 #if defined(MBEDTLS_FS_IO)
603 /*
604 * Load one or more CRLs and add them to the chained list
605 */
606 int mbedtls_x509_crl_parse_file( mbedtls_x509_crl *chain, const char *path )
607 {
608 int ret;
609 size_t n;
610 unsigned char *buf;
611
612 if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
613 return( ret );
614
615 ret = mbedtls_x509_crl_parse( chain, buf, n );
616
617 mbedtls_platform_zeroize( buf, n );
618 mbedtls_free( buf );
619
620 return( ret );
621 }
622 #endif /* MBEDTLS_FS_IO */
623
624 /*
625 * Return an informational string about the certificate.
626 */
627 #define BEFORE_COLON 14
628 #define BC "14"
629 /*
630 * Return an informational string about the CRL.
631 */
632 int mbedtls_x509_crl_info( char *buf, size_t size, const char *prefix,
633 const mbedtls_x509_crl *crl )
634 {
635 int ret;
636 size_t n;
637 char *p;
638 const mbedtls_x509_crl_entry *entry;
639
640 p = buf;
641 n = size;
642
643 ret = mbedtls_snprintf( p, n, "%sCRL version : %d",
644 prefix, crl->version );
645 MBEDTLS_X509_SAFE_SNPRINTF;
646
647 ret = mbedtls_snprintf( p, n, "\n%sissuer name : ", prefix );
648 MBEDTLS_X509_SAFE_SNPRINTF;
649 ret = mbedtls_x509_dn_gets( p, n, &crl->issuer );
650 MBEDTLS_X509_SAFE_SNPRINTF;
651
652 ret = mbedtls_snprintf( p, n, "\n%sthis update : " \
653 "%04d-%02d-%02d %02d:%02d:%02d", prefix,
654 crl->this_update.year, crl->this_update.mon,
655 crl->this_update.day, crl->this_update.hour,
656 crl->this_update.min, crl->this_update.sec );
657 MBEDTLS_X509_SAFE_SNPRINTF;
658
659 ret = mbedtls_snprintf( p, n, "\n%snext update : " \
660 "%04d-%02d-%02d %02d:%02d:%02d", prefix,
661 crl->next_update.year, crl->next_update.mon,
662 crl->next_update.day, crl->next_update.hour,
663 crl->next_update.min, crl->next_update.sec );
664 MBEDTLS_X509_SAFE_SNPRINTF;
665
666 entry = &crl->entry;
667
668 ret = mbedtls_snprintf( p, n, "\n%sRevoked certificates:",
669 prefix );
670 MBEDTLS_X509_SAFE_SNPRINTF;
671
672 while( entry != NULL && entry->raw.len != 0 )
673 {
674 ret = mbedtls_snprintf( p, n, "\n%sserial number: ",
675 prefix );
676 MBEDTLS_X509_SAFE_SNPRINTF;
677
678 ret = mbedtls_x509_serial_gets( p, n, &entry->serial );
679 MBEDTLS_X509_SAFE_SNPRINTF;
680
681 ret = mbedtls_snprintf( p, n, " revocation date: " \
682 "%04d-%02d-%02d %02d:%02d:%02d",
683 entry->revocation_date.year, entry->revocation_date.mon,
684 entry->revocation_date.day, entry->revocation_date.hour,
685 entry->revocation_date.min, entry->revocation_date.sec );
686 MBEDTLS_X509_SAFE_SNPRINTF;
687
688 entry = entry->next;
689 }
690
691 ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
692 MBEDTLS_X509_SAFE_SNPRINTF;
693
694 ret = mbedtls_x509_sig_alg_gets( p, n, &crl->sig_oid, crl->sig_pk, crl->sig_md,
695 crl->sig_opts );
696 MBEDTLS_X509_SAFE_SNPRINTF;
697
698 ret = mbedtls_snprintf( p, n, "\n" );
699 MBEDTLS_X509_SAFE_SNPRINTF;
700
701 return( (int) ( size - n ) );
702 }
703
704 /*
705 * Initialize a CRL chain
706 */
707 void mbedtls_x509_crl_init( mbedtls_x509_crl *crl )
708 {
709 memset( crl, 0, sizeof(mbedtls_x509_crl) );
710 }
711
712 /*
713 * Unallocate all CRL data
714 */
715 void mbedtls_x509_crl_free( mbedtls_x509_crl *crl )
716 {
717 mbedtls_x509_crl *crl_cur = crl;
718 mbedtls_x509_crl *crl_prv;
719 mbedtls_x509_name *name_cur;
720 mbedtls_x509_name *name_prv;
721 mbedtls_x509_crl_entry *entry_cur;
722 mbedtls_x509_crl_entry *entry_prv;
723
724 if( crl == NULL )
725 return;
726
727 do
728 {
729 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
730 mbedtls_free( crl_cur->sig_opts );
731 #endif
732
733 name_cur = crl_cur->issuer.next;
734 while( name_cur != NULL )
735 {
736 name_prv = name_cur;
737 name_cur = name_cur->next;
738 mbedtls_platform_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
739 mbedtls_free( name_prv );
740 }
741
742 entry_cur = crl_cur->entry.next;
743 while( entry_cur != NULL )
744 {
745 entry_prv = entry_cur;
746 entry_cur = entry_cur->next;
747 mbedtls_platform_zeroize( entry_prv,
748 sizeof( mbedtls_x509_crl_entry ) );
749 mbedtls_free( entry_prv );
750 }
751
752 if( crl_cur->raw.p != NULL )
753 {
754 mbedtls_platform_zeroize( crl_cur->raw.p, crl_cur->raw.len );
755 mbedtls_free( crl_cur->raw.p );
756 }
757
758 crl_cur = crl_cur->next;
759 }
760 while( crl_cur != NULL );
761
762 crl_cur = crl;
763 do
764 {
765 crl_prv = crl_cur;
766 crl_cur = crl_cur->next;
767
768 mbedtls_platform_zeroize( crl_prv, sizeof( mbedtls_x509_crl ) );
769 if( crl_prv != crl )
770 mbedtls_free( crl_prv );
771 }
772 while( crl_cur != NULL );
773 }
774
775 #endif /* MBEDTLS_X509_CRL_PARSE_C */
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