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ts_rsp_verify.c

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1/*-
2 * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.-
3 *-
4 * Licensed under the OpenSSL license (the "License"). You may not use-
5 * this file except in compliance with the License. You can obtain a copy-
6 * in the file LICENSE in the source distribution or at-
7 * https://www.openssl.org/source/license.html-
8 */-
9-
10#include <stdio.h>-
11#include "internal/cryptlib.h"-
12#include <openssl/objects.h>-
13#include <openssl/ts.h>-
14#include <openssl/pkcs7.h>-
15#include "ts_lcl.h"-
16-
17static int ts_verify_cert(X509_STORE *store, STACK_OF(X509) *untrusted,-
18 X509 *signer, STACK_OF(X509) **chain);-
19static int ts_check_signing_certs(PKCS7_SIGNER_INFO *si,-
20 STACK_OF(X509) *chain);-
21static ESS_SIGNING_CERT *ess_get_signing_cert(PKCS7_SIGNER_INFO *si);-
22static int ts_find_cert(STACK_OF(ESS_CERT_ID) *cert_ids, X509 *cert);-
23static int ts_issuer_serial_cmp(ESS_ISSUER_SERIAL *is, X509 *cert);-
24static int int_ts_RESP_verify_token(TS_VERIFY_CTX *ctx,-
25 PKCS7 *token, TS_TST_INFO *tst_info);-
26static int ts_check_status_info(TS_RESP *response);-
27static char *ts_get_status_text(STACK_OF(ASN1_UTF8STRING) *text);-
28static int ts_check_policy(const ASN1_OBJECT *req_oid,-
29 const TS_TST_INFO *tst_info);-
30static int ts_compute_imprint(BIO *data, TS_TST_INFO *tst_info,-
31 X509_ALGOR **md_alg,-
32 unsigned char **imprint, unsigned *imprint_len);-
33static int ts_check_imprints(X509_ALGOR *algor_a,-
34 const unsigned char *imprint_a, unsigned len_a,-
35 TS_TST_INFO *tst_info);-
36static int ts_check_nonces(const ASN1_INTEGER *a, TS_TST_INFO *tst_info);-
37static int ts_check_signer_name(GENERAL_NAME *tsa_name, X509 *signer);-
38static int ts_find_name(STACK_OF(GENERAL_NAME) *gen_names,-
39 GENERAL_NAME *name);-
40static int ts_find_cert_v2(STACK_OF(ESS_CERT_ID_V2) *cert_ids, X509 *cert);-
41static ESS_SIGNING_CERT_V2 *ess_get_signing_cert_v2(PKCS7_SIGNER_INFO *si);-
42-
43/*-
44 * This must be large enough to hold all values in ts_status_text (with-
45 * comma separator) or all text fields in ts_failure_info (also with comma).-
46 */-
47#define TS_STATUS_BUF_SIZE 256-
48-
49/*-
50 * Local mapping between response codes and descriptions.-
51 */-
52static const char *ts_status_text[] = {-
53 "granted",-
54 "grantedWithMods",-
55 "rejection",-
56 "waiting",-
57 "revocationWarning",-
58 "revocationNotification"-
59};-
60-
61#define TS_STATUS_TEXT_SIZE OSSL_NELEM(ts_status_text)-
62-
63static struct {-
64 int code;-
65 const char *text;-
66} ts_failure_info[] = {-
67 {TS_INFO_BAD_ALG, "badAlg"},-
68 {TS_INFO_BAD_REQUEST, "badRequest"},-
69 {TS_INFO_BAD_DATA_FORMAT, "badDataFormat"},-
70 {TS_INFO_TIME_NOT_AVAILABLE, "timeNotAvailable"},-
71 {TS_INFO_UNACCEPTED_POLICY, "unacceptedPolicy"},-
72 {TS_INFO_UNACCEPTED_EXTENSION, "unacceptedExtension"},-
73 {TS_INFO_ADD_INFO_NOT_AVAILABLE, "addInfoNotAvailable"},-
74 {TS_INFO_SYSTEM_FAILURE, "systemFailure"}-
75};-
76-
77-
78/*--
79 * This function carries out the following tasks:-
80 * - Checks if there is one and only one signer.-
81 * - Search for the signing certificate in 'certs' and in the response.-
82 * - Check the extended key usage and key usage fields of the signer-
83 * certificate (done by the path validation).-
84 * - Build and validate the certificate path.-
85 * - Check if the certificate path meets the requirements of the-
86 * SigningCertificate ESS signed attribute.-
87 * - Verify the signature value.-
88 * - Returns the signer certificate in 'signer', if 'signer' is not NULL.-
89 */-
90int TS_RESP_verify_signature(PKCS7 *token, STACK_OF(X509) *certs,-
91 X509_STORE *store, X509 **signer_out)-
92{-
93 STACK_OF(PKCS7_SIGNER_INFO) *sinfos = NULL;-
94 PKCS7_SIGNER_INFO *si;-
95 STACK_OF(X509) *signers = NULL;-
96 X509 *signer;-
97 STACK_OF(X509) *chain = NULL;-
98 char buf[4096];-
99 int i, j = 0, ret = 0;-
100 BIO *p7bio = NULL;-
101-
102 /* Some sanity checks first. */-
103 if (!token) {
!tokenDescription
TRUEnever evaluated
FALSEnever evaluated
0
104 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, TS_R_INVALID_NULL_POINTER);-
105 goto err;
never executed: goto err;
0
106 }-
107 if (!PKCS7_type_is_signed(token)) {
!(OBJ_obj2nid(...->type) == 22)Description
TRUEnever evaluated
FALSEnever evaluated
0
108 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, TS_R_WRONG_CONTENT_TYPE);-
109 goto err;
never executed: goto err;
0
110 }-
111 sinfos = PKCS7_get_signer_info(token);-
112 if (!sinfos || sk_PKCS7_SIGNER_INFO_num(sinfos) != 1) {
!sinfosDescription
TRUEnever evaluated
FALSEnever evaluated
sk_PKCS7_SIGNE...m(sinfos) != 1Description
TRUEnever evaluated
FALSEnever evaluated
0
113 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, TS_R_THERE_MUST_BE_ONE_SIGNER);-
114 goto err;
never executed: goto err;
0
115 }-
116 si = sk_PKCS7_SIGNER_INFO_value(sinfos, 0);-
117 if (PKCS7_get_detached(token)) {
PKCS7_ctrl(tok... ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
0
118 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, TS_R_NO_CONTENT);-
119 goto err;
never executed: goto err;
0
120 }-
121-
122 /*-
123 * Get hold of the signer certificate, search only internal certificates-
124 * if it was requested.-
125 */-
126 signers = PKCS7_get0_signers(token, certs, 0);-
127 if (!signers || sk_X509_num(signers) != 1)
!signersDescription
TRUEnever evaluated
FALSEnever evaluated
sk_X509_num(signers) != 1Description
TRUEnever evaluated
FALSEnever evaluated
0
128 goto err;
never executed: goto err;
0
129 signer = sk_X509_value(signers, 0);-
130-
131 if (!ts_verify_cert(store, certs, signer, &chain))
!ts_verify_cer...igner, &chain)Description
TRUEnever evaluated
FALSEnever evaluated
0
132 goto err;
never executed: goto err;
0
133 if (!ts_check_signing_certs(si, chain))
!ts_check_sign...rts(si, chain)Description
TRUEnever evaluated
FALSEnever evaluated
0
134 goto err;
never executed: goto err;
0
135 p7bio = PKCS7_dataInit(token, NULL);-
136-
137 /* We now have to 'read' from p7bio to calculate digests etc. */-
138 while ((i = BIO_read(p7bio, buf, sizeof(buf))) > 0)
(i = BIO_read(...eof(buf))) > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
139 continue;
never executed: continue;
0
140-
141 j = PKCS7_signatureVerify(p7bio, token, si, signer);-
142 if (j <= 0) {
j <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
143 TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, TS_R_SIGNATURE_FAILURE);-
144 goto err;
never executed: goto err;
0
145 }-
146-
147 if (signer_out) {
signer_outDescription
TRUEnever evaluated
FALSEnever evaluated
0
148 *signer_out = signer;-
149 X509_up_ref(signer);-
150 }
never executed: end of block
0
151 ret = 1;-
152-
153 err:
code before this statement never executed: err:
0
154 BIO_free_all(p7bio);-
155 sk_X509_pop_free(chain, X509_free);-
156 sk_X509_free(signers);-
157-
158 return ret;
never executed: return ret;
0
159}-
160-
161/*-
162 * The certificate chain is returned in chain. Caller is responsible for-
163 * freeing the vector.-
164 */-
165static int ts_verify_cert(X509_STORE *store, STACK_OF(X509) *untrusted,-
166 X509 *signer, STACK_OF(X509) **chain)-
167{-
168 X509_STORE_CTX *cert_ctx = NULL;-
169 int i;-
170 int ret = 0;-
171-
172 *chain = NULL;-
173 cert_ctx = X509_STORE_CTX_new();-
174 if (cert_ctx == NULL) {
cert_ctx == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
175 TSerr(TS_F_TS_VERIFY_CERT, ERR_R_MALLOC_FAILURE);-
176 goto err;
never executed: goto err;
0
177 }-
178 if (!X509_STORE_CTX_init(cert_ctx, store, signer, untrusted))
!X509_STORE_CT...er, untrusted)Description
TRUEnever evaluated
FALSEnever evaluated
0
179 goto end;
never executed: goto end;
0
180 X509_STORE_CTX_set_purpose(cert_ctx, X509_PURPOSE_TIMESTAMP_SIGN);-
181 i = X509_verify_cert(cert_ctx);-
182 if (i <= 0) {
i <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
183 int j = X509_STORE_CTX_get_error(cert_ctx);-
184 TSerr(TS_F_TS_VERIFY_CERT, TS_R_CERTIFICATE_VERIFY_ERROR);-
185 ERR_add_error_data(2, "Verify error:",-
186 X509_verify_cert_error_string(j));-
187 goto err;
never executed: goto err;
0
188 }-
189 *chain = X509_STORE_CTX_get1_chain(cert_ctx);-
190 ret = 1;-
191 goto end;
never executed: goto end;
0
192-
193err:-
194 ret = 0;-
195-
196end:
code before this statement never executed: end:
0
197 X509_STORE_CTX_free(cert_ctx);-
198 return ret;
never executed: return ret;
0
199}-
200-
201static int ts_check_signing_certs(PKCS7_SIGNER_INFO *si,-
202 STACK_OF(X509) *chain)-
203{-
204 ESS_SIGNING_CERT *ss = ess_get_signing_cert(si);-
205 STACK_OF(ESS_CERT_ID) *cert_ids = NULL;-
206 ESS_SIGNING_CERT_V2 *ssv2 = ess_get_signing_cert_v2(si);-
207 STACK_OF(ESS_CERT_ID_V2) *cert_ids_v2 = NULL;-
208 X509 *cert;-
209 int i = 0;-
210 int ret = 0;-
211-
212 if (ss != NULL) {
ss != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
213 cert_ids = ss->cert_ids;-
214 cert = sk_X509_value(chain, 0);-
215 if (ts_find_cert(cert_ids, cert) != 0)
ts_find_cert(c...ds, cert) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
216 goto err;
never executed: goto err;
0
217-
218 /*-
219 * Check the other certificates of the chain if there are more than one-
220 * certificate ids in cert_ids.-
221 */-
222 if (sk_ESS_CERT_ID_num(cert_ids) > 1) {
sk_ESS_CERT_ID...(cert_ids) > 1Description
TRUEnever evaluated
FALSEnever evaluated
0
223 for (i = 1; i < sk_X509_num(chain); ++i) {
i < sk_X509_num(chain)Description
TRUEnever evaluated
FALSEnever evaluated
0
224 cert = sk_X509_value(chain, i);-
225 if (ts_find_cert(cert_ids, cert) < 0)
ts_find_cert(c...ids, cert) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
226 goto err;
never executed: goto err;
0
227 }
never executed: end of block
0
228 }
never executed: end of block
0
229 } else if (ssv2 != NULL) {
never executed: end of block
ssv2 != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
230 cert_ids_v2 = ssv2->cert_ids;-
231 cert = sk_X509_value(chain, 0);-
232 if (ts_find_cert_v2(cert_ids_v2, cert) != 0)
ts_find_cert_v...v2, cert) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
233 goto err;
never executed: goto err;
0
234-
235 /*-
236 * Check the other certificates of the chain if there are more than one-
237 * certificate ids in cert_ids.-
238 */-
239 if (sk_ESS_CERT_ID_V2_num(cert_ids_v2) > 1) {
sk_ESS_CERT_ID...rt_ids_v2) > 1Description
TRUEnever evaluated
FALSEnever evaluated
0
240 for (i = 1; i < sk_X509_num(chain); ++i) {
i < sk_X509_num(chain)Description
TRUEnever evaluated
FALSEnever evaluated
0
241 cert = sk_X509_value(chain, i);-
242 if (ts_find_cert_v2(cert_ids_v2, cert) < 0)
ts_find_cert_v..._v2, cert) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
243 goto err;
never executed: goto err;
0
244 }
never executed: end of block
0
245 }
never executed: end of block
0
246 } else {
never executed: end of block
0
247 goto err;
never executed: goto err;
0
248 }-
249-
250 ret = 1;-
251 err:
code before this statement never executed: err:
0
252 if (!ret)
!retDescription
TRUEnever evaluated
FALSEnever evaluated
0
253 TSerr(TS_F_TS_CHECK_SIGNING_CERTS,
never executed: ERR_put_error(47,(103),(101),__FILE__,254) ;
0
254 TS_R_ESS_SIGNING_CERTIFICATE_ERROR);
never executed: ERR_put_error(47,(103),(101),__FILE__,254) ;
0
255 ESS_SIGNING_CERT_free(ss);-
256 ESS_SIGNING_CERT_V2_free(ssv2);-
257 return ret;
never executed: return ret;
0
258}-
259-
260static ESS_SIGNING_CERT *ess_get_signing_cert(PKCS7_SIGNER_INFO *si)-
261{-
262 ASN1_TYPE *attr;-
263 const unsigned char *p;-
264 attr = PKCS7_get_signed_attribute(si, NID_id_smime_aa_signingCertificate);-
265 if (!attr)
!attrDescription
TRUEnever evaluated
FALSEnever evaluated
0
266 return NULL;
never executed: return ((void *)0) ;
0
267 p = attr->value.sequence->data;-
268 return d2i_ESS_SIGNING_CERT(NULL, &p, attr->value.sequence->length);
never executed: return d2i_ESS_SIGNING_CERT( ((void *)0) , &p, attr->value.sequence->length);
0
269}-
270-
271static ESS_SIGNING_CERT_V2 *ess_get_signing_cert_v2(PKCS7_SIGNER_INFO *si)-
272{-
273 ASN1_TYPE *attr;-
274 const unsigned char *p;-
275-
276 attr = PKCS7_get_signed_attribute(si, NID_id_smime_aa_signingCertificateV2);-
277 if (attr == NULL)
attr == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
278 return NULL;
never executed: return ((void *)0) ;
0
279 p = attr->value.sequence->data;-
280 return d2i_ESS_SIGNING_CERT_V2(NULL, &p, attr->value.sequence->length);
never executed: return d2i_ESS_SIGNING_CERT_V2( ((void *)0) , &p, attr->value.sequence->length);
0
281}-
282-
283/* Returns < 0 if certificate is not found, certificate index otherwise. */-
284static int ts_find_cert(STACK_OF(ESS_CERT_ID) *cert_ids, X509 *cert)-
285{-
286 int i;-
287 unsigned char cert_sha1[SHA_DIGEST_LENGTH];-
288-
289 if (!cert_ids || !cert)
!cert_idsDescription
TRUEnever evaluated
FALSEnever evaluated
!certDescription
TRUEnever evaluated
FALSEnever evaluated
0
290 return -1;
never executed: return -1;
0
291-
292 X509_digest(cert, EVP_sha1(), cert_sha1, NULL);-
293-
294 /* Recompute SHA1 hash of certificate if necessary (side effect). */-
295 X509_check_purpose(cert, -1, 0);-
296-
297 /* Look for cert in the cert_ids vector. */-
298 for (i = 0; i < sk_ESS_CERT_ID_num(cert_ids); ++i) {
i < sk_ESS_CER..._num(cert_ids)Description
TRUEnever evaluated
FALSEnever evaluated
0
299 ESS_CERT_ID *cid = sk_ESS_CERT_ID_value(cert_ids, i);-
300-
301 if (cid->hash->length == SHA_DIGEST_LENGTH
cid->hash->length == 20Description
TRUEnever evaluated
FALSEnever evaluated
0
302 && memcmp(cid->hash->data, cert_sha1, SHA_DIGEST_LENGTH) == 0) {
memcmp(cid->ha...sha1, 20) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
303 ESS_ISSUER_SERIAL *is = cid->issuer_serial;-
304 if (!is || !ts_issuer_serial_cmp(is, cert))
!isDescription
TRUEnever evaluated
FALSEnever evaluated
!ts_issuer_ser..._cmp(is, cert)Description
TRUEnever evaluated
FALSEnever evaluated
0
305 return i;
never executed: return i;
0
306 }
never executed: end of block
0
307 }
never executed: end of block
0
308-
309 return -1;
never executed: return -1;
0
310}-
311-
312/* Returns < 0 if certificate is not found, certificate index otherwise. */-
313static int ts_find_cert_v2(STACK_OF(ESS_CERT_ID_V2) *cert_ids, X509 *cert)-
314{-
315 int i;-
316 unsigned char cert_digest[EVP_MAX_MD_SIZE];-
317 unsigned int len;-
318-
319 /* Look for cert in the cert_ids vector. */-
320 for (i = 0; i < sk_ESS_CERT_ID_V2_num(cert_ids); ++i) {
i < sk_ESS_CER..._num(cert_ids)Description
TRUEnever evaluated
FALSEnever evaluated
0
321 ESS_CERT_ID_V2 *cid = sk_ESS_CERT_ID_V2_value(cert_ids, i);-
322 const EVP_MD *md;-
323-
324 if (cid->hash_alg != NULL)
cid->hash_alg != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
325 md = EVP_get_digestbyobj(cid->hash_alg->algorithm);
never executed: md = EVP_get_digestbyname(OBJ_nid2sn(OBJ_obj2nid(cid->hash_alg->algorithm)));
0
326 else-
327 md = EVP_sha256();
never executed: md = EVP_sha256();
0
328-
329 X509_digest(cert, md, cert_digest, &len);-
330 if (cid->hash->length != (int)len)
cid->hash->length != (int)lenDescription
TRUEnever evaluated
FALSEnever evaluated
0
331 return -1;
never executed: return -1;
0
332-
333 if (memcmp(cid->hash->data, cert_digest, cid->hash->length) == 0) {
memcmp(cid->ha...->length) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
334 ESS_ISSUER_SERIAL *is = cid->issuer_serial;-
335-
336 if (is == NULL || !ts_issuer_serial_cmp(is, cert))
is == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
!ts_issuer_ser..._cmp(is, cert)Description
TRUEnever evaluated
FALSEnever evaluated
0
337 return i;
never executed: return i;
0
338 }
never executed: end of block
0
339 }
never executed: end of block
0
340-
341 return -1;
never executed: return -1;
0
342}-
343-
344static int ts_issuer_serial_cmp(ESS_ISSUER_SERIAL *is, X509 *cert)-
345{-
346 GENERAL_NAME *issuer;-
347-
348 if (!is || !cert || sk_GENERAL_NAME_num(is->issuer) != 1)
!isDescription
TRUEnever evaluated
FALSEnever evaluated
!certDescription
TRUEnever evaluated
FALSEnever evaluated
sk_GENERAL_NAM...->issuer) != 1Description
TRUEnever evaluated
FALSEnever evaluated
0
349 return -1;
never executed: return -1;
0
350-
351 issuer = sk_GENERAL_NAME_value(is->issuer, 0);-
352 if (issuer->type != GEN_DIRNAME
issuer->type != 4Description
TRUEnever evaluated
FALSEnever evaluated
0
353 || X509_NAME_cmp(issuer->d.dirn, X509_get_issuer_name(cert)))
X509_NAME_cmp(...er_name(cert))Description
TRUEnever evaluated
FALSEnever evaluated
0
354 return -1;
never executed: return -1;
0
355-
356 if (ASN1_INTEGER_cmp(is->serial, X509_get_serialNumber(cert)))
ASN1_INTEGER_c...lNumber(cert))Description
TRUEnever evaluated
FALSEnever evaluated
0
357 return -1;
never executed: return -1;
0
358-
359 return 0;
never executed: return 0;
0
360}-
361-
362/*--
363 * Verifies whether 'response' contains a valid response with regards-
364 * to the settings of the context:-
365 * - Gives an error message if the TS_TST_INFO is not present.-
366 * - Calls _TS_RESP_verify_token to verify the token content.-
367 */-
368int TS_RESP_verify_response(TS_VERIFY_CTX *ctx, TS_RESP *response)-
369{-
370 PKCS7 *token = response->token;-
371 TS_TST_INFO *tst_info = response->tst_info;-
372 int ret = 0;-
373-
374 if (!ts_check_status_info(response))
!ts_check_stat...info(response)Description
TRUEnever evaluated
FALSEnever evaluated
0
375 goto err;
never executed: goto err;
0
376 if (!int_ts_RESP_verify_token(ctx, token, tst_info))
!int_ts_RESP_v...ken, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
377 goto err;
never executed: goto err;
0
378 ret = 1;-
379-
380 err:
code before this statement never executed: err:
0
381 return ret;
never executed: return ret;
0
382}-
383-
384/*-
385 * Tries to extract a TS_TST_INFO structure from the PKCS7 token and-
386 * calls the internal int_TS_RESP_verify_token function for verifying it.-
387 */-
388int TS_RESP_verify_token(TS_VERIFY_CTX *ctx, PKCS7 *token)-
389{-
390 TS_TST_INFO *tst_info = PKCS7_to_TS_TST_INFO(token);-
391 int ret = 0;-
392 if (tst_info) {
tst_infoDescription
TRUEnever evaluated
FALSEnever evaluated
0
393 ret = int_ts_RESP_verify_token(ctx, token, tst_info);-
394 TS_TST_INFO_free(tst_info);-
395 }
never executed: end of block
0
396 return ret;
never executed: return ret;
0
397}-
398-
399/*--
400 * Verifies whether the 'token' contains a valid time stamp token-
401 * with regards to the settings of the context. Only those checks are-
402 * carried out that are specified in the context:-
403 * - Verifies the signature of the TS_TST_INFO.-
404 * - Checks the version number of the response.-
405 * - Check if the requested and returned policies math.-
406 * - Check if the message imprints are the same.-
407 * - Check if the nonces are the same.-
408 * - Check if the TSA name matches the signer.-
409 * - Check if the TSA name is the expected TSA.-
410 */-
411static int int_ts_RESP_verify_token(TS_VERIFY_CTX *ctx,-
412 PKCS7 *token, TS_TST_INFO *tst_info)-
413{-
414 X509 *signer = NULL;-
415 GENERAL_NAME *tsa_name = tst_info->tsa;-
416 X509_ALGOR *md_alg = NULL;-
417 unsigned char *imprint = NULL;-
418 unsigned imprint_len = 0;-
419 int ret = 0;-
420 int flags = ctx->flags;-
421-
422 /* Some options require us to also check the signature */-
423 if (((flags & TS_VFY_SIGNER) && tsa_name != NULL)
(flags & (1u << 6))Description
TRUEnever evaluated
FALSEnever evaluated
tsa_name != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
424 || (flags & TS_VFY_TSA_NAME)) {
(flags & (1u << 7))Description
TRUEnever evaluated
FALSEnever evaluated
0
425 flags |= TS_VFY_SIGNATURE;-
426 }
never executed: end of block
0
427-
428 if ((flags & TS_VFY_SIGNATURE)
(flags & (1u << 0))Description
TRUEnever evaluated
FALSEnever evaluated
0
429 && !TS_RESP_verify_signature(token, ctx->certs, ctx->store, &signer))
!TS_RESP_verif...tore, &signer)Description
TRUEnever evaluated
FALSEnever evaluated
0
430 goto err;
never executed: goto err;
0
431 if ((flags & TS_VFY_VERSION)
(flags & (1u << 1))Description
TRUEnever evaluated
FALSEnever evaluated
0
432 && TS_TST_INFO_get_version(tst_info) != 1) {
TS_TST_INFO_ge...tst_info) != 1Description
TRUEnever evaluated
FALSEnever evaluated
0
433 TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN, TS_R_UNSUPPORTED_VERSION);-
434 goto err;
never executed: goto err;
0
435 }-
436 if ((flags & TS_VFY_POLICY)
(flags & (1u << 2))Description
TRUEnever evaluated
FALSEnever evaluated
0
437 && !ts_check_policy(ctx->policy, tst_info))
!ts_check_poli...icy, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
438 goto err;
never executed: goto err;
0
439 if ((flags & TS_VFY_IMPRINT)
(flags & (1u << 3))Description
TRUEnever evaluated
FALSEnever evaluated
0
440 && !ts_check_imprints(ctx->md_alg, ctx->imprint, ctx->imprint_len,
!ts_check_impr...len, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
441 tst_info))
!ts_check_impr...len, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
442 goto err;
never executed: goto err;
0
443 if ((flags & TS_VFY_DATA)
(flags & (1u << 4))Description
TRUEnever evaluated
FALSEnever evaluated
0
444 && (!ts_compute_imprint(ctx->data, tst_info,
!ts_compute_im... &imprint_len)Description
TRUEnever evaluated
FALSEnever evaluated
0
445 &md_alg, &imprint, &imprint_len)
!ts_compute_im... &imprint_len)Description
TRUEnever evaluated
FALSEnever evaluated
0
446 || !ts_check_imprints(md_alg, imprint, imprint_len, tst_info)))
!ts_check_impr...len, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
447 goto err;
never executed: goto err;
0
448 if ((flags & TS_VFY_NONCE)
(flags & (1u << 5))Description
TRUEnever evaluated
FALSEnever evaluated
0
449 && !ts_check_nonces(ctx->nonce, tst_info))
!ts_check_nonc...nce, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
450 goto err;
never executed: goto err;
0
451 if ((flags & TS_VFY_SIGNER)
(flags & (1u << 6))Description
TRUEnever evaluated
FALSEnever evaluated
0
452 && tsa_name && !ts_check_signer_name(tsa_name, signer)) {
tsa_nameDescription
TRUEnever evaluated
FALSEnever evaluated
!ts_check_sign..._name, signer)Description
TRUEnever evaluated
FALSEnever evaluated
0
453 TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN, TS_R_TSA_NAME_MISMATCH);-
454 goto err;
never executed: goto err;
0
455 }-
456 if ((flags & TS_VFY_TSA_NAME)
(flags & (1u << 7))Description
TRUEnever evaluated
FALSEnever evaluated
0
457 && !ts_check_signer_name(ctx->tsa_name, signer)) {
!ts_check_sign..._name, signer)Description
TRUEnever evaluated
FALSEnever evaluated
0
458 TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN, TS_R_TSA_UNTRUSTED);-
459 goto err;
never executed: goto err;
0
460 }-
461 ret = 1;-
462-
463 err:
code before this statement never executed: err:
0
464 X509_free(signer);-
465 X509_ALGOR_free(md_alg);-
466 OPENSSL_free(imprint);-
467 return ret;
never executed: return ret;
0
468}-
469-
470static int ts_check_status_info(TS_RESP *response)-
471{-
472 TS_STATUS_INFO *info = response->status_info;-
473 long status = ASN1_INTEGER_get(info->status);-
474 const char *status_text = NULL;-
475 char *embedded_status_text = NULL;-
476 char failure_text[TS_STATUS_BUF_SIZE] = "";-
477-
478 if (status == 0 || status == 1)
status == 0Description
TRUEnever evaluated
FALSEnever evaluated
status == 1Description
TRUEnever evaluated
FALSEnever evaluated
0
479 return 1;
never executed: return 1;
0
480-
481 /* There was an error, get the description in status_text. */-
482 if (0 <= status && status < (long) OSSL_NELEM(ts_status_text))
0 <= statusDescription
TRUEnever evaluated
FALSEnever evaluated
status < (long...tus_text)[0]))Description
TRUEnever evaluated
FALSEnever evaluated
0
483 status_text = ts_status_text[status];
never executed: status_text = ts_status_text[status];
0
484 else-
485 status_text = "unknown code";
never executed: status_text = "unknown code";
0
486-
487 if (sk_ASN1_UTF8STRING_num(info->text) > 0
sk_ASN1_UTF8ST...nfo->text) > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
488 && (embedded_status_text = ts_get_status_text(info->text)) == NULL)
(embedded_stat...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
489 return 0;
never executed: return 0;
0
490-
491 /* Fill in failure_text with the failure information. */-
492 if (info->failure_info) {
info->failure_infoDescription
TRUEnever evaluated
FALSEnever evaluated
0
493 int i;-
494 int first = 1;-
495 for (i = 0; i < (int)OSSL_NELEM(ts_failure_info); ++i) {
i < (int)(size...ure_info)[0]))Description
TRUEnever evaluated
FALSEnever evaluated
0
496 if (ASN1_BIT_STRING_get_bit(info->failure_info,
ASN1_BIT_STRIN..._info[i].code)Description
TRUEnever evaluated
FALSEnever evaluated
0
497 ts_failure_info[i].code)) {
ASN1_BIT_STRIN..._info[i].code)Description
TRUEnever evaluated
FALSEnever evaluated
0
498 if (!first)
!firstDescription
TRUEnever evaluated
FALSEnever evaluated
0
499 strcat(failure_text, ",");
never executed: strcat(failure_text, ",");
0
500 else-
501 first = 0;
never executed: first = 0;
0
502 strcat(failure_text, ts_failure_info[i].text);-
503 }
never executed: end of block
0
504 }
never executed: end of block
0
505 }
never executed: end of block
0
506 if (failure_text[0] == '\0')
failure_text[0] == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
507 strcpy(failure_text, "unspecified");
never executed: strcpy(failure_text, "unspecified");
0
508-
509 TSerr(TS_F_TS_CHECK_STATUS_INFO, TS_R_NO_TIME_STAMP_TOKEN);-
510 ERR_add_error_data(6,-
511 "status code: ", status_text,-
512 ", status text: ", embedded_status_text ?-
513 embedded_status_text : "unspecified",-
514 ", failure codes: ", failure_text);-
515 OPENSSL_free(embedded_status_text);-
516-
517 return 0;
never executed: return 0;
0
518}-
519-
520static char *ts_get_status_text(STACK_OF(ASN1_UTF8STRING) *text)-
521{-
522 int i;-
523 int length = 0;-
524 char *result = NULL;-
525 char *p;-
526-
527 for (i = 0; i < sk_ASN1_UTF8STRING_num(text); ++i) {
i < sk_ASN1_UT...RING_num(text)Description
TRUEnever evaluated
FALSEnever evaluated
0
528 ASN1_UTF8STRING *current = sk_ASN1_UTF8STRING_value(text, i);-
529 if (ASN1_STRING_length(current) > TS_MAX_STATUS_LENGTH - length - 1)
ASN1_STRING_le...) - length - 1Description
TRUEnever evaluated
FALSEnever evaluated
0
530 return NULL;
never executed: return ((void *)0) ;
0
531 length += ASN1_STRING_length(current);-
532 length += 1; /* separator character */-
533 }
never executed: end of block
0
534 if ((result = OPENSSL_malloc(length)) == NULL) {
(result = CRYP...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
535 TSerr(TS_F_TS_GET_STATUS_TEXT, ERR_R_MALLOC_FAILURE);-
536 return NULL;
never executed: return ((void *)0) ;
0
537 }-
538-
539 for (i = 0, p = result; i < sk_ASN1_UTF8STRING_num(text); ++i) {
i < sk_ASN1_UT...RING_num(text)Description
TRUEnever evaluated
FALSEnever evaluated
0
540 ASN1_UTF8STRING *current = sk_ASN1_UTF8STRING_value(text, i);-
541 length = ASN1_STRING_length(current);-
542 if (i > 0)
i > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
543 *p++ = '/';
never executed: *p++ = '/';
0
544 strncpy(p, (const char *)ASN1_STRING_get0_data(current), length);-
545 p += length;-
546 }
never executed: end of block
0
547 *p = '\0';-
548-
549 return result;
never executed: return result;
0
550}-
551-
552static int ts_check_policy(const ASN1_OBJECT *req_oid,-
553 const TS_TST_INFO *tst_info)-
554{-
555 const ASN1_OBJECT *resp_oid = tst_info->policy_id;-
556-
557 if (OBJ_cmp(req_oid, resp_oid) != 0) {
OBJ_cmp(req_oi...resp_oid) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
558 TSerr(TS_F_TS_CHECK_POLICY, TS_R_POLICY_MISMATCH);-
559 return 0;
never executed: return 0;
0
560 }-
561-
562 return 1;
never executed: return 1;
0
563}-
564-
565static int ts_compute_imprint(BIO *data, TS_TST_INFO *tst_info,-
566 X509_ALGOR **md_alg,-
567 unsigned char **imprint, unsigned *imprint_len)-
568{-
569 TS_MSG_IMPRINT *msg_imprint = tst_info->msg_imprint;-
570 X509_ALGOR *md_alg_resp = msg_imprint->hash_algo;-
571 const EVP_MD *md;-
572 EVP_MD_CTX *md_ctx = NULL;-
573 unsigned char buffer[4096];-
574 int length;-
575-
576 *md_alg = NULL;-
577 *imprint = NULL;-
578-
579 if ((*md_alg = X509_ALGOR_dup(md_alg_resp)) == NULL)
(*md_alg = X50...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
580 goto err;
never executed: goto err;
0
581 if ((md = EVP_get_digestbyobj((*md_alg)->algorithm)) == NULL) {
(md = EVP_get_...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
582 TSerr(TS_F_TS_COMPUTE_IMPRINT, TS_R_UNSUPPORTED_MD_ALGORITHM);-
583 goto err;
never executed: goto err;
0
584 }-
585 length = EVP_MD_size(md);-
586 if (length < 0)
length < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
587 goto err;
never executed: goto err;
0
588 *imprint_len = length;-
589 if ((*imprint = OPENSSL_malloc(*imprint_len)) == NULL) {
(*imprint = CR...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
590 TSerr(TS_F_TS_COMPUTE_IMPRINT, ERR_R_MALLOC_FAILURE);-
591 goto err;
never executed: goto err;
0
592 }-
593-
594 md_ctx = EVP_MD_CTX_new();-
595 if (md_ctx == NULL) {
md_ctx == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
596 TSerr(TS_F_TS_COMPUTE_IMPRINT, ERR_R_MALLOC_FAILURE);-
597 goto err;
never executed: goto err;
0
598 }-
599 if (!EVP_DigestInit(md_ctx, md))
!EVP_DigestInit(md_ctx, md)Description
TRUEnever evaluated
FALSEnever evaluated
0
600 goto err;
never executed: goto err;
0
601 while ((length = BIO_read(data, buffer, sizeof(buffer))) > 0) {
(length = BIO_...(buffer))) > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
602 if (!EVP_DigestUpdate(md_ctx, buffer, length))
!EVP_DigestUpd...uffer, length)Description
TRUEnever evaluated
FALSEnever evaluated
0
603 goto err;
never executed: goto err;
0
604 }
never executed: end of block
0
605 if (!EVP_DigestFinal(md_ctx, *imprint, NULL))
!EVP_DigestFin... ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
0
606 goto err;
never executed: goto err;
0
607 EVP_MD_CTX_free(md_ctx);-
608-
609 return 1;
never executed: return 1;
0
610 err:-
611 EVP_MD_CTX_free(md_ctx);-
612 X509_ALGOR_free(*md_alg);-
613 OPENSSL_free(*imprint);-
614 *imprint_len = 0;-
615 *imprint = 0;-
616 return 0;
never executed: return 0;
0
617}-
618-
619static int ts_check_imprints(X509_ALGOR *algor_a,-
620 const unsigned char *imprint_a, unsigned len_a,-
621 TS_TST_INFO *tst_info)-
622{-
623 TS_MSG_IMPRINT *b = tst_info->msg_imprint;-
624 X509_ALGOR *algor_b = b->hash_algo;-
625 int ret = 0;-
626-
627 if (algor_a) {
algor_aDescription
TRUEnever evaluated
FALSEnever evaluated
0
628 if (OBJ_cmp(algor_a->algorithm, algor_b->algorithm))
OBJ_cmp(algor_..._b->algorithm)Description
TRUEnever evaluated
FALSEnever evaluated
0
629 goto err;
never executed: goto err;
0
630-
631 /* The parameter must be NULL in both. */-
632 if ((algor_a->parameter
algor_a->parameterDescription
TRUEnever evaluated
FALSEnever evaluated
0
633 && ASN1_TYPE_get(algor_a->parameter) != V_ASN1_NULL)
ASN1_TYPE_get(...arameter) != 5Description
TRUEnever evaluated
FALSEnever evaluated
0
634 || (algor_b->parameter
algor_b->parameterDescription
TRUEnever evaluated
FALSEnever evaluated
0
635 && ASN1_TYPE_get(algor_b->parameter) != V_ASN1_NULL))
ASN1_TYPE_get(...arameter) != 5Description
TRUEnever evaluated
FALSEnever evaluated
0
636 goto err;
never executed: goto err;
0
637 }
never executed: end of block
0
638-
639 ret = len_a == (unsigned)ASN1_STRING_length(b->hashed_msg) &&
len_a == (unsi...b->hashed_msg)Description
TRUEnever evaluated
FALSEnever evaluated
0
640 memcmp(imprint_a, ASN1_STRING_get0_data(b->hashed_msg), len_a) == 0;
memcmp(imprint...), len_a) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
641 err:
code before this statement never executed: err:
0
642 if (!ret)
!retDescription
TRUEnever evaluated
FALSEnever evaluated
0
643 TSerr(TS_F_TS_CHECK_IMPRINTS, TS_R_MESSAGE_IMPRINT_MISMATCH);
never executed: ERR_put_error(47,(100),(103),__FILE__,643);
0
644 return ret;
never executed: return ret;
0
645}-
646-
647static int ts_check_nonces(const ASN1_INTEGER *a, TS_TST_INFO *tst_info)-
648{-
649 const ASN1_INTEGER *b = tst_info->nonce;-
650-
651 if (!b) {
!bDescription
TRUEnever evaluated
FALSEnever evaluated
0
652 TSerr(TS_F_TS_CHECK_NONCES, TS_R_NONCE_NOT_RETURNED);-
653 return 0;
never executed: return 0;
0
654 }-
655-
656 /* No error if a nonce is returned without being requested. */-
657 if (ASN1_INTEGER_cmp(a, b) != 0) {
ASN1_INTEGER_cmp(a, b) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
658 TSerr(TS_F_TS_CHECK_NONCES, TS_R_NONCE_MISMATCH);-
659 return 0;
never executed: return 0;
0
660 }-
661-
662 return 1;
never executed: return 1;
0
663}-
664-
665/*-
666 * Check if the specified TSA name matches either the subject or one of the-
667 * subject alternative names of the TSA certificate.-
668 */-
669static int ts_check_signer_name(GENERAL_NAME *tsa_name, X509 *signer)-
670{-
671 STACK_OF(GENERAL_NAME) *gen_names = NULL;-
672 int idx = -1;-
673 int found = 0;-
674-
675 if (tsa_name->type == GEN_DIRNAME
tsa_name->type == 4Description
TRUEnever evaluated
FALSEnever evaluated
0
676 && X509_name_cmp(tsa_name->d.dirn, X509_get_subject_name(signer)) == 0)
X509_NAME_cmp(...signer))) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
677 return 1;
never executed: return 1;
0
678 gen_names = X509_get_ext_d2i(signer, NID_subject_alt_name, NULL, &idx);-
679 while (gen_names != NULL) {
gen_names != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
680 found = ts_find_name(gen_names, tsa_name) >= 0;-
681 if (found)
foundDescription
TRUEnever evaluated
FALSEnever evaluated
0
682 break;
never executed: break;
0
683 /*-
684 * Get the next subject alternative name, although there should be no-
685 * more than one.-
686 */-
687 GENERAL_NAMES_free(gen_names);-
688 gen_names = X509_get_ext_d2i(signer, NID_subject_alt_name, NULL, &idx);-
689 }
never executed: end of block
0
690 GENERAL_NAMES_free(gen_names);-
691-
692 return found;
never executed: return found;
0
693}-
694-
695/* Returns 1 if name is in gen_names, 0 otherwise. */-
696static int ts_find_name(STACK_OF(GENERAL_NAME) *gen_names, GENERAL_NAME *name)-
697{-
698 int i, found;-
699 for (i = 0, found = 0; !found && i < sk_GENERAL_NAME_num(gen_names); ++i) {
!foundDescription
TRUEnever evaluated
FALSEnever evaluated
i < sk_GENERAL...num(gen_names)Description
TRUEnever evaluated
FALSEnever evaluated
0
700 GENERAL_NAME *current = sk_GENERAL_NAME_value(gen_names, i);-
701 found = GENERAL_NAME_cmp(current, name) == 0;-
702 }
never executed: end of block
0
703 return found ? i - 1 : -1;
never executed: return found ? i - 1 : -1;
foundDescription
TRUEnever evaluated
FALSEnever evaluated
0
704}-
Source codeSwitch to Preprocessed file
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