1 /* crypto/ts/ts_resp_verify.c */
3 * Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/objects.h>
63 #include <openssl/ts.h>
64 #include <openssl/pkcs7.h>
66 /* Private function declarations. */
68 static int TS_verify_cert(X509_STORE
*store
, STACK_OF(X509
) *untrusted
,
69 X509
*signer
, STACK_OF(X509
) **chain
);
70 static int TS_check_signing_certs(PKCS7_SIGNER_INFO
*si
,
71 STACK_OF(X509
) *chain
);
72 static ESS_SIGNING_CERT
*ESS_get_signing_cert(PKCS7_SIGNER_INFO
*si
);
73 static int TS_find_cert(STACK_OF(ESS_CERT_ID
) *cert_ids
, X509
*cert
);
74 static int TS_issuer_serial_cmp(ESS_ISSUER_SERIAL
*is
, X509_CINF
*cinfo
);
75 static int int_TS_RESP_verify_token(TS_VERIFY_CTX
*ctx
,
76 PKCS7
*token
, TS_TST_INFO
*tst_info
);
77 static int TS_check_status_info(TS_RESP
*response
);
78 static char *TS_get_status_text(STACK_OF(ASN1_UTF8STRING
) *text
);
79 static int TS_check_policy(ASN1_OBJECT
*req_oid
, TS_TST_INFO
*tst_info
);
80 static int TS_compute_imprint(BIO
*data
, TS_TST_INFO
*tst_info
,
82 unsigned char **imprint
, unsigned *imprint_len
);
83 static int TS_check_imprints(X509_ALGOR
*algor_a
,
84 unsigned char *imprint_a
, unsigned len_a
,
85 TS_TST_INFO
*tst_info
);
86 static int TS_check_nonces(const ASN1_INTEGER
*a
, TS_TST_INFO
*tst_info
);
87 static int TS_check_signer_name(GENERAL_NAME
*tsa_name
, X509
*signer
);
88 static int TS_find_name(STACK_OF(GENERAL_NAME
) *gen_names
,
92 * Local mapping between response codes and descriptions.
93 * Don't forget to change TS_STATUS_BUF_SIZE when modifying
94 * the elements of this array.
96 static const char *TS_status_text
[] = { "granted",
101 "revocationNotification"
104 #define TS_STATUS_TEXT_SIZE (sizeof(TS_status_text)/sizeof(*TS_status_text))
107 * This must be greater or equal to the sum of the strings in TS_status_text
108 * plus the number of its elements.
110 #define TS_STATUS_BUF_SIZE 256
115 } TS_failure_info
[] = {
117 TS_INFO_BAD_ALG
, "badAlg"
120 TS_INFO_BAD_REQUEST
, "badRequest"
123 TS_INFO_BAD_DATA_FORMAT
, "badDataFormat"
126 TS_INFO_TIME_NOT_AVAILABLE
, "timeNotAvailable"
129 TS_INFO_UNACCEPTED_POLICY
, "unacceptedPolicy"
132 TS_INFO_UNACCEPTED_EXTENSION
, "unacceptedExtension"
135 TS_INFO_ADD_INFO_NOT_AVAILABLE
, "addInfoNotAvailable"
138 TS_INFO_SYSTEM_FAILURE
, "systemFailure"
142 #define TS_FAILURE_INFO_SIZE (sizeof(TS_failure_info) / \
143 sizeof(*TS_failure_info))
145 /* Functions for verifying a signed TS_TST_INFO structure. */
148 * This function carries out the following tasks:
149 * - Checks if there is one and only one signer.
150 * - Search for the signing certificate in 'certs' and in the response.
151 * - Check the extended key usage and key usage fields of the signer
152 * certificate (done by the path validation).
153 * - Build and validate the certificate path.
154 * - Check if the certificate path meets the requirements of the
155 * SigningCertificate ESS signed attribute.
156 * - Verify the signature value.
157 * - Returns the signer certificate in 'signer', if 'signer' is not NULL.
159 int TS_RESP_verify_signature(PKCS7
*token
, STACK_OF(X509
) *certs
,
160 X509_STORE
*store
, X509
**signer_out
)
162 STACK_OF(PKCS7_SIGNER_INFO
) *sinfos
= NULL
;
163 PKCS7_SIGNER_INFO
*si
;
164 STACK_OF(X509
) *signers
= NULL
;
166 STACK_OF(X509
) *chain
= NULL
;
168 int i
, j
= 0, ret
= 0;
171 /* Some sanity checks first. */
173 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE
, TS_R_INVALID_NULL_POINTER
);
177 /* Check for the correct content type */
178 if (!PKCS7_type_is_signed(token
)) {
179 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE
, TS_R_WRONG_CONTENT_TYPE
);
183 /* Check if there is one and only one signer. */
184 sinfos
= PKCS7_get_signer_info(token
);
185 if (!sinfos
|| sk_PKCS7_SIGNER_INFO_num(sinfos
) != 1) {
186 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE
, TS_R_THERE_MUST_BE_ONE_SIGNER
);
189 si
= sk_PKCS7_SIGNER_INFO_value(sinfos
, 0);
191 /* Check for no content: no data to verify signature. */
192 if (PKCS7_get_detached(token
)) {
193 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE
, TS_R_NO_CONTENT
);
198 * Get hold of the signer certificate, search only internal certificates
199 * if it was requested.
201 signers
= PKCS7_get0_signers(token
, certs
, 0);
202 if (!signers
|| sk_X509_num(signers
) != 1)
204 signer
= sk_X509_value(signers
, 0);
206 /* Now verify the certificate. */
207 if (!TS_verify_cert(store
, certs
, signer
, &chain
))
211 * Check if the signer certificate is consistent with the ESS extension.
213 if (!TS_check_signing_certs(si
, chain
))
216 /* Creating the message digest. */
217 p7bio
= PKCS7_dataInit(token
, NULL
);
219 /* We now have to 'read' from p7bio to calculate digests etc. */
220 while ((i
= BIO_read(p7bio
, buf
, sizeof(buf
))) > 0) ;
222 /* Verifying the signature. */
223 j
= PKCS7_signatureVerify(p7bio
, token
, si
, signer
);
225 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE
, TS_R_SIGNATURE_FAILURE
);
229 /* Return the signer certificate if needed. */
231 *signer_out
= signer
;
232 CRYPTO_add(&signer
->references
, 1, CRYPTO_LOCK_X509
);
239 sk_X509_pop_free(chain
, X509_free
);
240 sk_X509_free(signers
);
246 * The certificate chain is returned in chain. Caller is responsible for
247 * freeing the vector.
249 static int TS_verify_cert(X509_STORE
*store
, STACK_OF(X509
) *untrusted
,
250 X509
*signer
, STACK_OF(X509
) **chain
)
252 X509_STORE_CTX cert_ctx
;
256 /* chain is an out argument. */
258 if (!X509_STORE_CTX_init(&cert_ctx
, store
, signer
, untrusted
))
260 X509_STORE_CTX_set_purpose(&cert_ctx
, X509_PURPOSE_TIMESTAMP_SIGN
);
261 i
= X509_verify_cert(&cert_ctx
);
263 int j
= X509_STORE_CTX_get_error(&cert_ctx
);
264 TSerr(TS_F_TS_VERIFY_CERT
, TS_R_CERTIFICATE_VERIFY_ERROR
);
265 ERR_add_error_data(2, "Verify error:",
266 X509_verify_cert_error_string(j
));
269 /* Get a copy of the certificate chain. */
270 *chain
= X509_STORE_CTX_get1_chain(&cert_ctx
);
273 X509_STORE_CTX_cleanup(&cert_ctx
);
278 static int TS_check_signing_certs(PKCS7_SIGNER_INFO
*si
,
279 STACK_OF(X509
) *chain
)
281 ESS_SIGNING_CERT
*ss
= ESS_get_signing_cert(si
);
282 STACK_OF(ESS_CERT_ID
) *cert_ids
= NULL
;
289 cert_ids
= ss
->cert_ids
;
290 /* The signer certificate must be the first in cert_ids. */
291 cert
= sk_X509_value(chain
, 0);
292 if (TS_find_cert(cert_ids
, cert
) != 0)
296 * Check the other certificates of the chain if there are more than one
297 * certificate ids in cert_ids.
299 if (sk_ESS_CERT_ID_num(cert_ids
) > 1) {
300 /* All the certificates of the chain must be in cert_ids. */
301 for (i
= 1; i
< sk_X509_num(chain
); ++i
) {
302 cert
= sk_X509_value(chain
, i
);
303 if (TS_find_cert(cert_ids
, cert
) < 0)
310 TSerr(TS_F_TS_CHECK_SIGNING_CERTS
,
311 TS_R_ESS_SIGNING_CERTIFICATE_ERROR
);
312 ESS_SIGNING_CERT_free(ss
);
316 static ESS_SIGNING_CERT
*ESS_get_signing_cert(PKCS7_SIGNER_INFO
*si
)
319 const unsigned char *p
;
320 attr
= PKCS7_get_signed_attribute(si
, NID_id_smime_aa_signingCertificate
);
323 p
= attr
->value
.sequence
->data
;
324 return d2i_ESS_SIGNING_CERT(NULL
, &p
, attr
->value
.sequence
->length
);
327 /* Returns < 0 if certificate is not found, certificate index otherwise. */
328 static int TS_find_cert(STACK_OF(ESS_CERT_ID
) *cert_ids
, X509
*cert
)
332 if (!cert_ids
|| !cert
)
335 /* Recompute SHA1 hash of certificate if necessary (side effect). */
336 X509_check_purpose(cert
, -1, 0);
338 /* Look for cert in the cert_ids vector. */
339 for (i
= 0; i
< sk_ESS_CERT_ID_num(cert_ids
); ++i
) {
340 ESS_CERT_ID
*cid
= sk_ESS_CERT_ID_value(cert_ids
, i
);
342 /* Check the SHA-1 hash first. */
343 if (cid
->hash
->length
== sizeof(cert
->sha1_hash
)
344 && !memcmp(cid
->hash
->data
, cert
->sha1_hash
,
345 sizeof(cert
->sha1_hash
))) {
346 /* Check the issuer/serial as well if specified. */
347 ESS_ISSUER_SERIAL
*is
= cid
->issuer_serial
;
348 if (!is
|| !TS_issuer_serial_cmp(is
, cert
->cert_info
))
356 static int TS_issuer_serial_cmp(ESS_ISSUER_SERIAL
*is
, X509_CINF
*cinfo
)
358 GENERAL_NAME
*issuer
;
360 if (!is
|| !cinfo
|| sk_GENERAL_NAME_num(is
->issuer
) != 1)
363 /* Check the issuer first. It must be a directory name. */
364 issuer
= sk_GENERAL_NAME_value(is
->issuer
, 0);
365 if (issuer
->type
!= GEN_DIRNAME
366 || X509_NAME_cmp(issuer
->d
.dirn
, cinfo
->issuer
))
369 /* Check the serial number, too. */
370 if (ASN1_INTEGER_cmp(is
->serial
, cinfo
->serialNumber
))
377 * Verifies whether 'response' contains a valid response with regards
378 * to the settings of the context:
379 * - Gives an error message if the TS_TST_INFO is not present.
380 * - Calls _TS_RESP_verify_token to verify the token content.
382 int TS_RESP_verify_response(TS_VERIFY_CTX
*ctx
, TS_RESP
*response
)
384 PKCS7
*token
= TS_RESP_get_token(response
);
385 TS_TST_INFO
*tst_info
= TS_RESP_get_tst_info(response
);
388 /* Check if we have a successful TS_TST_INFO object in place. */
389 if (!TS_check_status_info(response
))
392 /* Check the contents of the time stamp token. */
393 if (!int_TS_RESP_verify_token(ctx
, token
, tst_info
))
402 * Tries to extract a TS_TST_INFO structure from the PKCS7 token and
403 * calls the internal int_TS_RESP_verify_token function for verifying it.
405 int TS_RESP_verify_token(TS_VERIFY_CTX
*ctx
, PKCS7
*token
)
407 TS_TST_INFO
*tst_info
= PKCS7_to_TS_TST_INFO(token
);
410 ret
= int_TS_RESP_verify_token(ctx
, token
, tst_info
);
411 TS_TST_INFO_free(tst_info
);
417 * Verifies whether the 'token' contains a valid time stamp token
418 * with regards to the settings of the context. Only those checks are
419 * carried out that are specified in the context:
420 * - Verifies the signature of the TS_TST_INFO.
421 * - Checks the version number of the response.
422 * - Check if the requested and returned policies math.
423 * - Check if the message imprints are the same.
424 * - Check if the nonces are the same.
425 * - Check if the TSA name matches the signer.
426 * - Check if the TSA name is the expected TSA.
428 static int int_TS_RESP_verify_token(TS_VERIFY_CTX
*ctx
,
429 PKCS7
*token
, TS_TST_INFO
*tst_info
)
432 GENERAL_NAME
*tsa_name
= TS_TST_INFO_get_tsa(tst_info
);
433 X509_ALGOR
*md_alg
= NULL
;
434 unsigned char *imprint
= NULL
;
435 unsigned imprint_len
= 0;
438 /* Verify the signature. */
439 if ((ctx
->flags
& TS_VFY_SIGNATURE
)
440 && !TS_RESP_verify_signature(token
, ctx
->certs
, ctx
->store
, &signer
))
443 /* Check version number of response. */
444 if ((ctx
->flags
& TS_VFY_VERSION
)
445 && TS_TST_INFO_get_version(tst_info
) != 1) {
446 TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN
, TS_R_UNSUPPORTED_VERSION
);
450 /* Check policies. */
451 if ((ctx
->flags
& TS_VFY_POLICY
)
452 && !TS_check_policy(ctx
->policy
, tst_info
))
455 /* Check message imprints. */
456 if ((ctx
->flags
& TS_VFY_IMPRINT
)
457 && !TS_check_imprints(ctx
->md_alg
, ctx
->imprint
, ctx
->imprint_len
,
461 /* Compute and check message imprints. */
462 if ((ctx
->flags
& TS_VFY_DATA
)
463 && (!TS_compute_imprint(ctx
->data
, tst_info
,
464 &md_alg
, &imprint
, &imprint_len
)
465 || !TS_check_imprints(md_alg
, imprint
, imprint_len
, tst_info
)))
469 if ((ctx
->flags
& TS_VFY_NONCE
)
470 && !TS_check_nonces(ctx
->nonce
, tst_info
))
473 /* Check whether TSA name and signer certificate match. */
474 if ((ctx
->flags
& TS_VFY_SIGNER
)
475 && tsa_name
&& !TS_check_signer_name(tsa_name
, signer
)) {
476 TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN
, TS_R_TSA_NAME_MISMATCH
);
480 /* Check whether the TSA is the expected one. */
481 if ((ctx
->flags
& TS_VFY_TSA_NAME
)
482 && !TS_check_signer_name(ctx
->tsa_name
, signer
)) {
483 TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN
, TS_R_TSA_UNTRUSTED
);
490 X509_ALGOR_free(md_alg
);
491 OPENSSL_free(imprint
);
495 static int TS_check_status_info(TS_RESP
*response
)
497 TS_STATUS_INFO
*info
= TS_RESP_get_status_info(response
);
498 long status
= ASN1_INTEGER_get(info
->status
);
499 const char *status_text
= NULL
;
500 char *embedded_status_text
= NULL
;
501 char failure_text
[TS_STATUS_BUF_SIZE
] = "";
503 /* Check if everything went fine. */
504 if (status
== 0 || status
== 1)
507 /* There was an error, get the description in status_text. */
508 if (0 <= status
&& status
< (long)TS_STATUS_TEXT_SIZE
)
509 status_text
= TS_status_text
[status
];
511 status_text
= "unknown code";
513 /* Set the embedded_status_text to the returned description. */
514 if (sk_ASN1_UTF8STRING_num(info
->text
) > 0
515 && !(embedded_status_text
= TS_get_status_text(info
->text
)))
518 /* Filling in failure_text with the failure information. */
519 if (info
->failure_info
) {
522 for (i
= 0; i
< (int)TS_FAILURE_INFO_SIZE
; ++i
) {
523 if (ASN1_BIT_STRING_get_bit(info
->failure_info
,
524 TS_failure_info
[i
].code
)) {
526 strcat(failure_text
, ",");
529 strcat(failure_text
, TS_failure_info
[i
].text
);
533 if (failure_text
[0] == '\0')
534 strcpy(failure_text
, "unspecified");
536 /* Making up the error string. */
537 TSerr(TS_F_TS_CHECK_STATUS_INFO
, TS_R_NO_TIME_STAMP_TOKEN
);
538 ERR_add_error_data(6,
539 "status code: ", status_text
,
540 ", status text: ", embedded_status_text
?
541 embedded_status_text
: "unspecified",
542 ", failure codes: ", failure_text
);
543 OPENSSL_free(embedded_status_text
);
548 static char *TS_get_status_text(STACK_OF(ASN1_UTF8STRING
) *text
)
551 unsigned int length
= 0;
555 /* Determine length first. */
556 for (i
= 0; i
< sk_ASN1_UTF8STRING_num(text
); ++i
) {
557 ASN1_UTF8STRING
*current
= sk_ASN1_UTF8STRING_value(text
, i
);
558 length
+= ASN1_STRING_length(current
);
559 length
+= 1; /* separator character */
561 /* Allocate memory (closing '\0' included). */
562 if (!(result
= OPENSSL_malloc(length
))) {
563 TSerr(TS_F_TS_GET_STATUS_TEXT
, ERR_R_MALLOC_FAILURE
);
566 /* Concatenate the descriptions. */
567 for (i
= 0, p
= result
; i
< sk_ASN1_UTF8STRING_num(text
); ++i
) {
568 ASN1_UTF8STRING
*current
= sk_ASN1_UTF8STRING_value(text
, i
);
569 length
= ASN1_STRING_length(current
);
572 strncpy(p
, (const char *)ASN1_STRING_data(current
), length
);
575 /* We do have space for this, too. */
581 static int TS_check_policy(ASN1_OBJECT
*req_oid
, TS_TST_INFO
*tst_info
)
583 ASN1_OBJECT
*resp_oid
= TS_TST_INFO_get_policy_id(tst_info
);
585 if (OBJ_cmp(req_oid
, resp_oid
) != 0) {
586 TSerr(TS_F_TS_CHECK_POLICY
, TS_R_POLICY_MISMATCH
);
593 static int TS_compute_imprint(BIO
*data
, TS_TST_INFO
*tst_info
,
595 unsigned char **imprint
, unsigned *imprint_len
)
597 TS_MSG_IMPRINT
*msg_imprint
= TS_TST_INFO_get_msg_imprint(tst_info
);
598 X509_ALGOR
*md_alg_resp
= TS_MSG_IMPRINT_get_algo(msg_imprint
);
601 unsigned char buffer
[4096];
607 /* Return the MD algorithm of the response. */
608 if (!(*md_alg
= X509_ALGOR_dup(md_alg_resp
)))
611 /* Getting the MD object. */
612 if (!(md
= EVP_get_digestbyobj((*md_alg
)->algorithm
))) {
613 TSerr(TS_F_TS_COMPUTE_IMPRINT
, TS_R_UNSUPPORTED_MD_ALGORITHM
);
617 /* Compute message digest. */
618 length
= EVP_MD_size(md
);
621 *imprint_len
= length
;
622 if (!(*imprint
= OPENSSL_malloc(*imprint_len
))) {
623 TSerr(TS_F_TS_COMPUTE_IMPRINT
, ERR_R_MALLOC_FAILURE
);
627 if (!EVP_DigestInit(&md_ctx
, md
))
629 while ((length
= BIO_read(data
, buffer
, sizeof(buffer
))) > 0) {
630 if (!EVP_DigestUpdate(&md_ctx
, buffer
, length
))
633 if (!EVP_DigestFinal(&md_ctx
, *imprint
, NULL
))
638 X509_ALGOR_free(*md_alg
);
639 OPENSSL_free(*imprint
);
645 static int TS_check_imprints(X509_ALGOR
*algor_a
,
646 unsigned char *imprint_a
, unsigned len_a
,
647 TS_TST_INFO
*tst_info
)
649 TS_MSG_IMPRINT
*b
= TS_TST_INFO_get_msg_imprint(tst_info
);
650 X509_ALGOR
*algor_b
= TS_MSG_IMPRINT_get_algo(b
);
653 /* algor_a is optional. */
655 /* Compare algorithm OIDs. */
656 if (OBJ_cmp(algor_a
->algorithm
, algor_b
->algorithm
))
659 /* The parameter must be NULL in both. */
660 if ((algor_a
->parameter
661 && ASN1_TYPE_get(algor_a
->parameter
) != V_ASN1_NULL
)
662 || (algor_b
->parameter
663 && ASN1_TYPE_get(algor_b
->parameter
) != V_ASN1_NULL
))
667 /* Compare octet strings. */
668 ret
= len_a
== (unsigned)ASN1_STRING_length(b
->hashed_msg
) &&
669 memcmp(imprint_a
, ASN1_STRING_data(b
->hashed_msg
), len_a
) == 0;
672 TSerr(TS_F_TS_CHECK_IMPRINTS
, TS_R_MESSAGE_IMPRINT_MISMATCH
);
676 static int TS_check_nonces(const ASN1_INTEGER
*a
, TS_TST_INFO
*tst_info
)
678 const ASN1_INTEGER
*b
= TS_TST_INFO_get_nonce(tst_info
);
680 /* Error if nonce is missing. */
682 TSerr(TS_F_TS_CHECK_NONCES
, TS_R_NONCE_NOT_RETURNED
);
686 /* No error if a nonce is returned without being requested. */
687 if (ASN1_INTEGER_cmp(a
, b
) != 0) {
688 TSerr(TS_F_TS_CHECK_NONCES
, TS_R_NONCE_MISMATCH
);
696 * Check if the specified TSA name matches either the subject or one of the
697 * subject alternative names of the TSA certificate.
699 static int TS_check_signer_name(GENERAL_NAME
*tsa_name
, X509
*signer
)
701 STACK_OF(GENERAL_NAME
) *gen_names
= NULL
;
705 /* Check the subject name first. */
706 if (tsa_name
->type
== GEN_DIRNAME
707 && X509_name_cmp(tsa_name
->d
.dirn
, signer
->cert_info
->subject
) == 0)
710 /* Check all the alternative names. */
711 gen_names
= X509_get_ext_d2i(signer
, NID_subject_alt_name
, NULL
, &idx
);
712 while (gen_names
!= NULL
713 && !(found
= TS_find_name(gen_names
, tsa_name
) >= 0)) {
715 * Get the next subject alternative name, although there should be no
718 GENERAL_NAMES_free(gen_names
);
719 gen_names
= X509_get_ext_d2i(signer
, NID_subject_alt_name
,
723 GENERAL_NAMES_free(gen_names
);
728 /* Returns 1 if name is in gen_names, 0 otherwise. */
729 static int TS_find_name(STACK_OF(GENERAL_NAME
) *gen_names
, GENERAL_NAME
*name
)
732 for (i
= 0, found
= 0; !found
&& i
< sk_GENERAL_NAME_num(gen_names
); ++i
) {
733 GENERAL_NAME
*current
= sk_GENERAL_NAME_value(gen_names
, i
);
734 found
= GENERAL_NAME_cmp(current
, name
) == 0;
736 return found
? i
- 1 : -1;