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ts_rsp_verify.c

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1/* $OpenBSD: ts_rsp_verify.c,v 1.18 2017/01/29 17:49:23 beck Exp $ */-
2/* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL-
3 * project 2002.-
4 */-
5/* ====================================================================-
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.-
7 *-
8 * Redistribution and use in source and binary forms, with or without-
9 * modification, are permitted provided that the following conditions-
10 * are met:-
11 *-
12 * 1. Redistributions of source code must retain the above copyright-
13 * notice, this list of conditions and the following disclaimer.-
14 *-
15 * 2. Redistributions in binary form must reproduce the above copyright-
16 * notice, this list of conditions and the following disclaimer in-
17 * the documentation and/or other materials provided with the-
18 * distribution.-
19 *-
20 * 3. All advertising materials mentioning features or use of this-
21 * software must display the following acknowledgment:-
22 * "This product includes software developed by the OpenSSL Project-
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"-
24 *-
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to-
26 * endorse or promote products derived from this software without-
27 * prior written permission. For written permission, please contact-
28 * licensing@OpenSSL.org.-
29 *-
30 * 5. Products derived from this software may not be called "OpenSSL"-
31 * nor may "OpenSSL" appear in their names without prior written-
32 * permission of the OpenSSL Project.-
33 *-
34 * 6. Redistributions of any form whatsoever must retain the following-
35 * acknowledgment:-
36 * "This product includes software developed by the OpenSSL Project-
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"-
38 *-
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY-
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE-
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR-
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR-
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,-
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;-
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)-
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,-
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)-
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED-
50 * OF THE POSSIBILITY OF SUCH DAMAGE.-
51 * ====================================================================-
52 *-
53 * This product includes cryptographic software written by Eric Young-
54 * (eay@cryptsoft.com). This product includes software written by Tim-
55 * Hudson (tjh@cryptsoft.com).-
56 *-
57 */-
58-
59#include <stdio.h>-
60#include <string.h>-
61-
62#include <openssl/err.h>-
63#include <openssl/objects.h>-
64#include <openssl/pkcs7.h>-
65#include <openssl/ts.h>-
66-
67/* Private function declarations. */-
68-
69static int TS_verify_cert(X509_STORE *store, STACK_OF(X509) *untrusted,-
70 X509 *signer, STACK_OF(X509) **chain);-
71static int TS_check_signing_certs(PKCS7_SIGNER_INFO *si, STACK_OF(X509) *chain);-
72static ESS_SIGNING_CERT *ESS_get_signing_cert(PKCS7_SIGNER_INFO *si);-
73static int TS_find_cert(STACK_OF(ESS_CERT_ID) *cert_ids, X509 *cert);-
74static int TS_issuer_serial_cmp(ESS_ISSUER_SERIAL *is, X509_CINF *cinfo);-
75static int int_TS_RESP_verify_token(TS_VERIFY_CTX *ctx,-
76 PKCS7 *token, TS_TST_INFO *tst_info);-
77static int TS_check_status_info(TS_RESP *response);-
78static char *TS_get_status_text(STACK_OF(ASN1_UTF8STRING) *text);-
79static int TS_check_policy(ASN1_OBJECT *req_oid, TS_TST_INFO *tst_info);-
80static int TS_compute_imprint(BIO *data, TS_TST_INFO *tst_info,-
81 X509_ALGOR **md_alg,-
82 unsigned char **imprint, unsigned *imprint_len);-
83static int TS_check_imprints(X509_ALGOR *algor_a,-
84 unsigned char *imprint_a, unsigned len_a,-
85 TS_TST_INFO *tst_info);-
86static int TS_check_nonces(const ASN1_INTEGER *a, TS_TST_INFO *tst_info);-
87static int TS_check_signer_name(GENERAL_NAME *tsa_name, X509 *signer);-
88static int TS_find_name(STACK_OF(GENERAL_NAME) *gen_names, GENERAL_NAME *name);-
89-
90/*-
91 * Local mapping between response codes and descriptions.-
92 * Don't forget to change TS_STATUS_BUF_SIZE when modifying-
93 * the elements of this array.-
94 */-
95static const char *TS_status_text[] = {-
96 "granted",-
97 "grantedWithMods",-
98 "rejection",-
99 "waiting",-
100 "revocationWarning",-
101 "revocationNotification"-
102};-
103-
104#define TS_STATUS_TEXT_SIZE (sizeof(TS_status_text)/sizeof(*TS_status_text))-
105-
106/*-
107 * This must be greater or equal to the sum of the strings in TS_status_text-
108 * plus the number of its elements.-
109 */-
110#define TS_STATUS_BUF_SIZE 256-
111-
112static struct {-
113 int code;-
114 const char *text;-
115} TS_failure_info[] = {-
116 { TS_INFO_BAD_ALG, "badAlg" },-
117 { TS_INFO_BAD_REQUEST, "badRequest" },-
118 { TS_INFO_BAD_DATA_FORMAT, "badDataFormat" },-
119 { TS_INFO_TIME_NOT_AVAILABLE, "timeNotAvailable" },-
120 { TS_INFO_UNACCEPTED_POLICY, "unacceptedPolicy" },-
121 { TS_INFO_UNACCEPTED_EXTENSION, "unacceptedExtension" },-
122 { TS_INFO_ADD_INFO_NOT_AVAILABLE, "addInfoNotAvailable" },-
123 { TS_INFO_SYSTEM_FAILURE, "systemFailure" }-
124};-
125-
126#define TS_FAILURE_INFO_SIZE (sizeof(TS_failure_info) / \-
127 sizeof(*TS_failure_info))-
128-
129/* Functions for verifying a signed TS_TST_INFO structure. */-
130-
131/*-
132 * This function carries out the following tasks:-
133 * - Checks if there is one and only one signer.-
134 * - Search for the signing certificate in 'certs' and in the response.-
135 * - Check the extended key usage and key usage fields of the signer-
136 * certificate (done by the path validation).-
137 * - Build and validate the certificate path.-
138 * - Check if the certificate path meets the requirements of the-
139 * SigningCertificate ESS signed attribute.-
140 * - Verify the signature value.-
141 * - Returns the signer certificate in 'signer', if 'signer' is not NULL.-
142 */-
143int-
144TS_RESP_verify_signature(PKCS7 *token, STACK_OF(X509) *certs,-
145 X509_STORE *store, X509 **signer_out)-
146{-
147 STACK_OF(PKCS7_SIGNER_INFO) *sinfos = NULL;-
148 PKCS7_SIGNER_INFO *si;-
149 STACK_OF(X509) *signers = NULL;-
150 X509 *signer;-
151 STACK_OF(X509) *chain = NULL;-
152 char buf[4096];-
153 int i, j = 0, ret = 0;-
154 BIO *p7bio = NULL;-
155-
156 /* Some sanity checks first. */-
157 if (!token) {
!tokenDescription
TRUEnever evaluated
FALSEnever evaluated
0
158 TSerror(TS_R_INVALID_NULL_POINTER);-
159 goto err;
never executed: goto err;
0
160 }-
161-
162 /* Check for the correct content type */-
163 if (!PKCS7_type_is_signed(token)) {
!(OBJ_obj2nid(...->type) == 22)Description
TRUEnever evaluated
FALSEnever evaluated
0
164 TSerror(TS_R_WRONG_CONTENT_TYPE);-
165 goto err;
never executed: goto err;
0
166 }-
167-
168 /* Check if there is one and only one signer. */-
169 sinfos = PKCS7_get_signer_info(token);-
170 if (!sinfos || sk_PKCS7_SIGNER_INFO_num(sinfos) != 1) {
!sinfosDescription
TRUEnever evaluated
FALSEnever evaluated
sk_num(((_STAC...NFO*)0))) != 1Description
TRUEnever evaluated
FALSEnever evaluated
0
171 TSerror(TS_R_THERE_MUST_BE_ONE_SIGNER);-
172 goto err;
never executed: goto err;
0
173 }-
174 si = sk_PKCS7_SIGNER_INFO_value(sinfos, 0);-
175-
176 /* Check for no content: no data to verify signature. */-
177 if (PKCS7_get_detached(token)) {
PKCS7_ctrl(tok... ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
0
178 TSerror(TS_R_NO_CONTENT);-
179 goto err;
never executed: goto err;
0
180 }-
181-
182 /* Get hold of the signer certificate, search only internal-
183 certificates if it was requested. */-
184 signers = PKCS7_get0_signers(token, certs, 0);-
185 if (!signers || sk_X509_num(signers) != 1)
!signersDescription
TRUEnever evaluated
FALSEnever evaluated
sk_num(((_STAC...509*)0))) != 1Description
TRUEnever evaluated
FALSEnever evaluated
0
186 goto err;
never executed: goto err;
0
187 signer = sk_X509_value(signers, 0);-
188-
189 /* Now verify the certificate. */-
190 if (!TS_verify_cert(store, certs, signer, &chain))
!TS_verify_cer...igner, &chain)Description
TRUEnever evaluated
FALSEnever evaluated
0
191 goto err;
never executed: goto err;
0
192-
193 /* Check if the signer certificate is consistent with the-
194 ESS extension. */-
195 if (!TS_check_signing_certs(si, chain))
!TS_check_sign...rts(si, chain)Description
TRUEnever evaluated
FALSEnever evaluated
0
196 goto err;
never executed: goto err;
0
197-
198 /* Creating the message digest. */-
199 p7bio = PKCS7_dataInit(token, NULL);-
200-
201 /* We now have to 'read' from p7bio to calculate digests etc. */-
202 while ((i = BIO_read(p7bio, buf, sizeof(buf))) > 0)
(i = BIO_read(...eof(buf))) > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
203 ;
never executed: ;
0
204-
205 /* Verifying the signature. */-
206 j = PKCS7_signatureVerify(p7bio, token, si, signer);-
207 if (j <= 0) {
j <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
208 TSerror(TS_R_SIGNATURE_FAILURE);-
209 goto err;
never executed: goto err;
0
210 }-
211-
212 /* Return the signer certificate if needed. */-
213 if (signer_out) {
signer_outDescription
TRUEnever evaluated
FALSEnever evaluated
0
214 *signer_out = signer;-
215 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);-
216 }
never executed: end of block
0
217-
218 ret = 1;-
219-
220err:
code before this statement never executed: err:
0
221 BIO_free_all(p7bio);-
222 sk_X509_pop_free(chain, X509_free);-
223 sk_X509_free(signers);-
224-
225 return ret;
never executed: return ret;
0
226}-
227-
228/*-
229 * The certificate chain is returned in chain. Caller is responsible for-
230 * freeing the vector.-
231 */-
232static int-
233TS_verify_cert(X509_STORE *store, STACK_OF(X509) *untrusted, X509 *signer,-
234 STACK_OF(X509) **chain)-
235{-
236 X509_STORE_CTX cert_ctx;-
237 int i;-
238 int ret = 0;-
239-
240 /* chain is an out argument. */-
241 *chain = NULL;-
242 if (X509_STORE_CTX_init(&cert_ctx, store, signer, untrusted) == 0) {
X509_STORE_CTX...ntrusted) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
243 TSerror(ERR_R_X509_LIB);-
244 goto err;
never executed: goto err;
0
245 }-
246 if (X509_STORE_CTX_set_purpose(&cert_ctx,
X509_STORE_CTX...t_ctx, 9) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
247 X509_PURPOSE_TIMESTAMP_SIGN) == 0)
X509_STORE_CTX...t_ctx, 9) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
248 goto err;
never executed: goto err;
0
249 i = X509_verify_cert(&cert_ctx);-
250 if (i <= 0) {
i <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
251 int j = X509_STORE_CTX_get_error(&cert_ctx);-
252-
253 TSerror(TS_R_CERTIFICATE_VERIFY_ERROR);-
254 ERR_asprintf_error_data("Verify error:%s",-
255 X509_verify_cert_error_string(j));-
256 goto err;
never executed: goto err;
0
257 } else {-
258 /* Get a copy of the certificate chain. */-
259 *chain = X509_STORE_CTX_get1_chain(&cert_ctx);-
260 ret = 1;-
261 }
never executed: end of block
0
262-
263err:
code before this statement never executed: err:
0
264 X509_STORE_CTX_cleanup(&cert_ctx);-
265-
266 return ret;
never executed: return ret;
0
267}-
268-
269static int-
270TS_check_signing_certs(PKCS7_SIGNER_INFO *si, STACK_OF(X509) *chain)-
271{-
272 ESS_SIGNING_CERT *ss = ESS_get_signing_cert(si);-
273 STACK_OF(ESS_CERT_ID) *cert_ids = NULL;-
274 X509 *cert;-
275 int i = 0;-
276 int ret = 0;-
277-
278 if (!ss)
!ssDescription
TRUEnever evaluated
FALSEnever evaluated
0
279 goto err;
never executed: goto err;
0
280 cert_ids = ss->cert_ids;-
281 /* The signer certificate must be the first in cert_ids. */-
282 cert = sk_X509_value(chain, 0);-
283 if (TS_find_cert(cert_ids, cert) != 0)
TS_find_cert(c...ds, cert) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
284 goto err;
never executed: goto err;
0
285-
286 /* Check the other certificates of the chain if there are more-
287 than one certificate ids in cert_ids. */-
288 if (sk_ESS_CERT_ID_num(cert_ids) > 1) {
sk_num(((_STAC...T_ID*)0))) > 1Description
TRUEnever evaluated
FALSEnever evaluated
0
289 /* All the certificates of the chain must be in cert_ids. */-
290 for (i = 1; i < sk_X509_num(chain); ++i) {
i < sk_num(((_..._st_X509*)0)))Description
TRUEnever evaluated
FALSEnever evaluated
0
291 cert = sk_X509_value(chain, i);-
292 if (TS_find_cert(cert_ids, cert) < 0)
TS_find_cert(c...ids, cert) < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
293 goto err;
never executed: goto err;
0
294 }
never executed: end of block
0
295 }
never executed: end of block
0
296 ret = 1;-
297-
298err:
code before this statement never executed: err:
0
299 if (!ret)
!retDescription
TRUEnever evaluated
FALSEnever evaluated
0
300 TSerror(TS_R_ESS_SIGNING_CERTIFICATE_ERROR);
never executed: ERR_put_error(47,(0xfff),(101),__FILE__,300);
0
301 ESS_SIGNING_CERT_free(ss);-
302 return ret;
never executed: return ret;
0
303}-
304-
305static ESS_SIGNING_CERT *-
306ESS_get_signing_cert(PKCS7_SIGNER_INFO *si)-
307{-
308 ASN1_TYPE *attr;-
309 const unsigned char *p;-
310-
311 attr = PKCS7_get_signed_attribute(si,-
312 NID_id_smime_aa_signingCertificate);-
313 if (!attr)
!attrDescription
TRUEnever evaluated
FALSEnever evaluated
0
314 return NULL;
never executed: return ((void *)0) ;
0
315 if (attr->type != V_ASN1_SEQUENCE)
attr->type != 16Description
TRUEnever evaluated
FALSEnever evaluated
0
316 return NULL;
never executed: return ((void *)0) ;
0
317 p = attr->value.sequence->data;-
318 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
319}-
320-
321/* Returns < 0 if certificate is not found, certificate index otherwise. */-
322static int-
323TS_find_cert(STACK_OF(ESS_CERT_ID) *cert_ids, X509 *cert)-
324{-
325 int i;-
326-
327 if (!cert_ids || !cert)
!cert_idsDescription
TRUEnever evaluated
FALSEnever evaluated
!certDescription
TRUEnever evaluated
FALSEnever evaluated
0
328 return -1;
never executed: return -1;
0
329-
330 /* Recompute SHA1 hash of certificate if necessary (side effect). */-
331 X509_check_purpose(cert, -1, 0);-
332-
333 /* Look for cert in the cert_ids vector. */-
334 for (i = 0; i < sk_ESS_CERT_ID_num(cert_ids); ++i) {
i < sk_num(((_..._CERT_ID*)0)))Description
TRUEnever evaluated
FALSEnever evaluated
0
335 ESS_CERT_ID *cid = sk_ESS_CERT_ID_value(cert_ids, i);-
336-
337 /* Check the SHA-1 hash first. */-
338 if (cid->hash->length == sizeof(cert->sha1_hash) &&
cid->hash->len...rt->sha1_hash)Description
TRUEnever evaluated
FALSEnever evaluated
0
339 !memcmp(cid->hash->data, cert->sha1_hash,
!memcmp(cid->h...t->sha1_hash))Description
TRUEnever evaluated
FALSEnever evaluated
0
340 sizeof(cert->sha1_hash))) {
!memcmp(cid->h...t->sha1_hash))Description
TRUEnever evaluated
FALSEnever evaluated
0
341 /* Check the issuer/serial as well if specified. */-
342 ESS_ISSUER_SERIAL *is = cid->issuer_serial;-
343 if (!is || !TS_issuer_serial_cmp(is, cert->cert_info))
!isDescription
TRUEnever evaluated
FALSEnever evaluated
!TS_issuer_ser...rt->cert_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
344 return i;
never executed: return i;
0
345 }
never executed: end of block
0
346 }
never executed: end of block
0
347-
348 return -1;
never executed: return -1;
0
349}-
350-
351static int-
352TS_issuer_serial_cmp(ESS_ISSUER_SERIAL *is, X509_CINF *cinfo)-
353{-
354 GENERAL_NAME *issuer;-
355-
356 if (!is || !cinfo || sk_GENERAL_NAME_num(is->issuer) != 1)
!isDescription
TRUEnever evaluated
FALSEnever evaluated
!cinfoDescription
TRUEnever evaluated
FALSEnever evaluated
sk_num(((_STAC...AME*)0))) != 1Description
TRUEnever evaluated
FALSEnever evaluated
0
357 return -1;
never executed: return -1;
0
358-
359 /* Check the issuer first. It must be a directory name. */-
360 issuer = sk_GENERAL_NAME_value(is->issuer, 0);-
361 if (issuer->type != GEN_DIRNAME ||
issuer->type != 4Description
TRUEnever evaluated
FALSEnever evaluated
0
362 X509_NAME_cmp(issuer->d.dirn, cinfo->issuer))
X509_NAME_cmp(...cinfo->issuer)Description
TRUEnever evaluated
FALSEnever evaluated
0
363 return -1;
never executed: return -1;
0
364-
365 /* Check the serial number, too. */-
366 if (ASN1_INTEGER_cmp(is->serial, cinfo->serialNumber))
ASN1_INTEGER_c...>serialNumber)Description
TRUEnever evaluated
FALSEnever evaluated
0
367 return -1;
never executed: return -1;
0
368-
369 return 0;
never executed: return 0;
0
370}-
371-
372/*-
373 * Verifies whether 'response' contains a valid response with regards-
374 * to the settings of the context:-
375 * - Gives an error message if the TS_TST_INFO is not present.-
376 * - Calls _TS_RESP_verify_token to verify the token content.-
377 */-
378int-
379TS_RESP_verify_response(TS_VERIFY_CTX *ctx, TS_RESP *response)-
380{-
381 PKCS7 *token = TS_RESP_get_token(response);-
382 TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);-
383 int ret = 0;-
384-
385 /* Check if we have a successful TS_TST_INFO object in place. */-
386 if (!TS_check_status_info(response))
!TS_check_stat...info(response)Description
TRUEnever evaluated
FALSEnever evaluated
0
387 goto err;
never executed: goto err;
0
388-
389 /* Check the contents of the time stamp token. */-
390 if (!int_TS_RESP_verify_token(ctx, token, tst_info))
!int_TS_RESP_v...ken, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
391 goto err;
never executed: goto err;
0
392-
393 ret = 1;-
394-
395err:
code before this statement never executed: err:
0
396 return ret;
never executed: return ret;
0
397}-
398-
399/*-
400 * Tries to extract a TS_TST_INFO structure from the PKCS7 token and-
401 * calls the internal int_TS_RESP_verify_token function for verifying it.-
402 */-
403int-
404TS_RESP_verify_token(TS_VERIFY_CTX *ctx, PKCS7 *token)-
405{-
406 TS_TST_INFO *tst_info = PKCS7_to_TS_TST_INFO(token);-
407 int ret = 0;-
408-
409 if (tst_info) {
tst_infoDescription
TRUEnever evaluated
FALSEnever evaluated
0
410 ret = int_TS_RESP_verify_token(ctx, token, tst_info);-
411 TS_TST_INFO_free(tst_info);-
412 }
never executed: end of block
0
413 return ret;
never executed: return ret;
0
414}-
415-
416/*-
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.-
427 */-
428static int-
429int_TS_RESP_verify_token(TS_VERIFY_CTX *ctx, PKCS7 *token,-
430 TS_TST_INFO *tst_info)-
431{-
432 X509 *signer = NULL;-
433 GENERAL_NAME *tsa_name = TS_TST_INFO_get_tsa(tst_info);-
434 X509_ALGOR *md_alg = NULL;-
435 unsigned char *imprint = NULL;-
436 unsigned imprint_len = 0;-
437 int ret = 0;-
438-
439 /* Verify the signature. */-
440 if ((ctx->flags & TS_VFY_SIGNATURE) &&
(ctx->flags & (1u << 0))Description
TRUEnever evaluated
FALSEnever evaluated
0
441 !TS_RESP_verify_signature(token, ctx->certs, ctx->store, &signer))
!TS_RESP_verif...tore, &signer)Description
TRUEnever evaluated
FALSEnever evaluated
0
442 goto err;
never executed: goto err;
0
443-
444 /* Check version number of response. */-
445 if ((ctx->flags & TS_VFY_VERSION) &&
(ctx->flags & (1u << 1))Description
TRUEnever evaluated
FALSEnever evaluated
0
446 TS_TST_INFO_get_version(tst_info) != 1) {
TS_TST_INFO_ge...tst_info) != 1Description
TRUEnever evaluated
FALSEnever evaluated
0
447 TSerror(TS_R_UNSUPPORTED_VERSION);-
448 goto err;
never executed: goto err;
0
449 }-
450-
451 /* Check policies. */-
452 if ((ctx->flags & TS_VFY_POLICY) &&
(ctx->flags & (1u << 2))Description
TRUEnever evaluated
FALSEnever evaluated
0
453 !TS_check_policy(ctx->policy, tst_info))
!TS_check_poli...icy, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
454 goto err;
never executed: goto err;
0
455-
456 /* Check message imprints. */-
457 if ((ctx->flags & TS_VFY_IMPRINT) &&
(ctx->flags & (1u << 3))Description
TRUEnever evaluated
FALSEnever evaluated
0
458 !TS_check_imprints(ctx->md_alg, ctx->imprint, ctx->imprint_len,
!TS_check_impr...len, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
459 tst_info))
!TS_check_impr...len, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
460 goto err;
never executed: goto err;
0
461-
462 /* Compute and check message imprints. */-
463 if ((ctx->flags & TS_VFY_DATA) &&
(ctx->flags & (1u << 4))Description
TRUEnever evaluated
FALSEnever evaluated
0
464 (!TS_compute_imprint(ctx->data, tst_info,
!TS_compute_im... &imprint_len)Description
TRUEnever evaluated
FALSEnever evaluated
0
465 &md_alg, &imprint, &imprint_len) ||
!TS_compute_im... &imprint_len)Description
TRUEnever evaluated
FALSEnever evaluated
0
466 !TS_check_imprints(md_alg, imprint, imprint_len, tst_info)))
!TS_check_impr...len, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
467 goto err;
never executed: goto err;
0
468-
469 /* Check nonces. */-
470 if ((ctx->flags & TS_VFY_NONCE) &&
(ctx->flags & (1u << 5))Description
TRUEnever evaluated
FALSEnever evaluated
0
471 !TS_check_nonces(ctx->nonce, tst_info))
!TS_check_nonc...nce, tst_info)Description
TRUEnever evaluated
FALSEnever evaluated
0
472 goto err;
never executed: goto err;
0
473-
474 /* Check whether TSA name and signer certificate match. */-
475 if ((ctx->flags & TS_VFY_SIGNER) &&
(ctx->flags & (1u << 6))Description
TRUEnever evaluated
FALSEnever evaluated
0
476 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
477 TSerror(TS_R_TSA_NAME_MISMATCH);-
478 goto err;
never executed: goto err;
0
479 }-
480-
481 /* Check whether the TSA is the expected one. */-
482 if ((ctx->flags & TS_VFY_TSA_NAME) &&
(ctx->flags & (1u << 7))Description
TRUEnever evaluated
FALSEnever evaluated
0
483 !TS_check_signer_name(ctx->tsa_name, signer)) {
!TS_check_sign..._name, signer)Description
TRUEnever evaluated
FALSEnever evaluated
0
484 TSerror(TS_R_TSA_UNTRUSTED);-
485 goto err;
never executed: goto err;
0
486 }-
487-
488 ret = 1;-
489-
490err:
code before this statement never executed: err:
0
491 X509_free(signer);-
492 X509_ALGOR_free(md_alg);-
493 free(imprint);-
494 return ret;
never executed: return ret;
0
495}-
496-
497static int-
498TS_check_status_info(TS_RESP *response)-
499{-
500 TS_STATUS_INFO *info = TS_RESP_get_status_info(response);-
501 long status = ASN1_INTEGER_get(info->status);-
502 const char *status_text = NULL;-
503 char *embedded_status_text = NULL;-
504 char failure_text[TS_STATUS_BUF_SIZE] = "";-
505-
506 /* Check if everything went fine. */-
507 if (status == 0 || status == 1)
status == 0Description
TRUEnever evaluated
FALSEnever evaluated
status == 1Description
TRUEnever evaluated
FALSEnever evaluated
0
508 return 1;
never executed: return 1;
0
509-
510 /* There was an error, get the description in status_text. */-
511 if (0 <= status && status < (long)TS_STATUS_TEXT_SIZE)
0 <= statusDescription
TRUEnever evaluated
FALSEnever evaluated
status < (long..._status_text))Description
TRUEnever evaluated
FALSEnever evaluated
0
512 status_text = TS_status_text[status];
never executed: status_text = TS_status_text[status];
0
513 else-
514 status_text = "unknown code";
never executed: status_text = "unknown code";
0
515-
516 /* Set the embedded_status_text to the returned description. */-
517 if (sk_ASN1_UTF8STRING_num(info->text) > 0 &&
sk_num(((_STAC...RING*)0))) > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
518 !(embedded_status_text = TS_get_status_text(info->text)))
!(embedded_sta...t(info->text))Description
TRUEnever evaluated
FALSEnever evaluated
0
519 return 0;
never executed: return 0;
0
520-
521 /* Filling in failure_text with the failure information. */-
522 if (info->failure_info) {
info->failure_infoDescription
TRUEnever evaluated
FALSEnever evaluated
0
523 int i;-
524 int first = 1;-
525 for (i = 0; i < (int)TS_FAILURE_INFO_SIZE; ++i) {
i < (int)(size...failure_info))Description
TRUEnever evaluated
FALSEnever evaluated
0
526 if (ASN1_BIT_STRING_get_bit(info->failure_info,
ASN1_BIT_STRIN..._info[i].code)Description
TRUEnever evaluated
FALSEnever evaluated
0
527 TS_failure_info[i].code)) {
ASN1_BIT_STRIN..._info[i].code)Description
TRUEnever evaluated
FALSEnever evaluated
0
528 if (!first)
!firstDescription
TRUEnever evaluated
FALSEnever evaluated
0
529 strlcat(failure_text, ",",
never executed: strlcat(failure_text, ",", 256);
0
530 TS_STATUS_BUF_SIZE);
never executed: strlcat(failure_text, ",", 256);
0
531 else-
532 first = 0;
never executed: first = 0;
0
533 strlcat(failure_text, TS_failure_info[i].text,-
534 TS_STATUS_BUF_SIZE);-
535 }
never executed: end of block
0
536 }
never executed: end of block
0
537 }
never executed: end of block
0
538 if (failure_text[0] == '\0')
failure_text[0] == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
539 strlcpy(failure_text, "unspecified", TS_STATUS_BUF_SIZE);
never executed: strlcpy(failure_text, "unspecified", 256);
0
540-
541 /* Making up the error string. */-
542 TSerror(TS_R_NO_TIME_STAMP_TOKEN);-
543 ERR_asprintf_error_data-
544 ("status code: %s, status text: %s, failure codes: %s",-
545 status_text,-
546 embedded_status_text ? embedded_status_text : "unspecified",-
547 failure_text);-
548 free(embedded_status_text);-
549-
550 return 0;
never executed: return 0;
0
551}-
552-
553static char *-
554TS_get_status_text(STACK_OF(ASN1_UTF8STRING) *text)-
555{-
556 int i;-
557 unsigned int length = 0;-
558 char *result = NULL;-
559-
560 /* Determine length first. */-
561 for (i = 0; i < sk_ASN1_UTF8STRING_num(text); ++i) {
i < sk_num(((_...F8STRING*)0)))Description
TRUEnever evaluated
FALSEnever evaluated
0
562 ASN1_UTF8STRING *current = sk_ASN1_UTF8STRING_value(text, i);-
563 length += ASN1_STRING_length(current);-
564 length += 1; /* separator character */-
565 }
never executed: end of block
0
566 /* Allocate memory (closing '\0' included). */-
567 if (!(result = malloc(length))) {
!(result = malloc(length))Description
TRUEnever evaluated
FALSEnever evaluated
0
568 TSerror(ERR_R_MALLOC_FAILURE);-
569 return NULL;
never executed: return ((void *)0) ;
0
570 }-
571 /* Concatenate the descriptions. */-
572 result[0] = '\0';-
573 for (i = 0; i < sk_ASN1_UTF8STRING_num(text); ++i) {
i < sk_num(((_...F8STRING*)0)))Description
TRUEnever evaluated
FALSEnever evaluated
0
574 ASN1_UTF8STRING *current = sk_ASN1_UTF8STRING_value(text, i);-
575 if (i > 0)
i > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
576 strlcat(result, "/", length);
never executed: strlcat(result, "/", length);
0
577 strlcat(result, (const char *)ASN1_STRING_data(current), length);-
578 }
never executed: end of block
0
579 return result;
never executed: return result;
0
580}-
581-
582static int-
583TS_check_policy(ASN1_OBJECT *req_oid, TS_TST_INFO *tst_info)-
584{-
585 ASN1_OBJECT *resp_oid = TS_TST_INFO_get_policy_id(tst_info);-
586-
587 if (OBJ_cmp(req_oid, resp_oid) != 0) {
OBJ_cmp(req_oi...resp_oid) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
588 TSerror(TS_R_POLICY_MISMATCH);-
589 return 0;
never executed: return 0;
0
590 }-
591-
592 return 1;
never executed: return 1;
0
593}-
594-
595static int-
596TS_compute_imprint(BIO *data, TS_TST_INFO *tst_info, X509_ALGOR **md_alg,-
597 unsigned char **imprint, unsigned *imprint_len)-
598{-
599 TS_MSG_IMPRINT *msg_imprint = TS_TST_INFO_get_msg_imprint(tst_info);-
600 X509_ALGOR *md_alg_resp = TS_MSG_IMPRINT_get_algo(msg_imprint);-
601 const EVP_MD *md;-
602 EVP_MD_CTX md_ctx;-
603 unsigned char buffer[4096];-
604 int length;-
605-
606 *md_alg = NULL;-
607 *imprint = NULL;-
608-
609 /* Return the MD algorithm of the response. */-
610 if (!(*md_alg = X509_ALGOR_dup(md_alg_resp)))
!(*md_alg = X5...(md_alg_resp))Description
TRUEnever evaluated
FALSEnever evaluated
0
611 goto err;
never executed: goto err;
0
612-
613 /* Getting the MD object. */-
614 if (!(md = EVP_get_digestbyobj((*md_alg)->algorithm))) {
!(md = EVP_get...>algorithm))))Description
TRUEnever evaluated
FALSEnever evaluated
0
615 TSerror(TS_R_UNSUPPORTED_MD_ALGORITHM);-
616 goto err;
never executed: goto err;
0
617 }-
618-
619 /* Compute message digest. */-
620 length = EVP_MD_size(md);-
621 if (length < 0)
length < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
622 goto err;
never executed: goto err;
0
623 *imprint_len = length;-
624 if (!(*imprint = malloc(*imprint_len))) {
!(*imprint = m...*imprint_len))Description
TRUEnever evaluated
FALSEnever evaluated
0
625 TSerror(ERR_R_MALLOC_FAILURE);-
626 goto err;
never executed: goto err;
0
627 }-
628-
629 if (!EVP_DigestInit(&md_ctx, md))
!EVP_DigestInit(&md_ctx, md)Description
TRUEnever evaluated
FALSEnever evaluated
0
630 goto err;
never executed: goto err;
0
631 while ((length = BIO_read(data, buffer, sizeof(buffer))) > 0) {
(length = BIO_...(buffer))) > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
632 if (!EVP_DigestUpdate(&md_ctx, buffer, length))
!EVP_DigestUpd...uffer, length)Description
TRUEnever evaluated
FALSEnever evaluated
0
633 goto err;
never executed: goto err;
0
634 }
never executed: end of block
0
635 if (!EVP_DigestFinal(&md_ctx, *imprint, NULL))
!EVP_DigestFin... ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
0
636 goto err;
never executed: goto err;
0
637-
638 return 1;
never executed: return 1;
0
639-
640err:-
641 X509_ALGOR_free(*md_alg);-
642 free(*imprint);-
643 *imprint = NULL;-
644 *imprint_len = 0;-
645 return 0;
never executed: return 0;
0
646}-
647-
648static int-
649TS_check_imprints(X509_ALGOR *algor_a, unsigned char *imprint_a, unsigned len_a,-
650 TS_TST_INFO *tst_info)-
651{-
652 TS_MSG_IMPRINT *b = TS_TST_INFO_get_msg_imprint(tst_info);-
653 X509_ALGOR *algor_b = TS_MSG_IMPRINT_get_algo(b);-
654 int ret = 0;-
655-
656 /* algor_a is optional. */-
657 if (algor_a) {
algor_aDescription
TRUEnever evaluated
FALSEnever evaluated
0
658 /* Compare algorithm OIDs. */-
659 if (OBJ_cmp(algor_a->algorithm, algor_b->algorithm))
OBJ_cmp(algor_..._b->algorithm)Description
TRUEnever evaluated
FALSEnever evaluated
0
660 goto err;
never executed: goto err;
0
661-
662 /* The parameter must be NULL in both. */-
663 if ((algor_a->parameter &&
algor_a->parameterDescription
TRUEnever evaluated
FALSEnever evaluated
0
664 ASN1_TYPE_get(algor_a->parameter) != V_ASN1_NULL) ||
ASN1_TYPE_get(...arameter) != 5Description
TRUEnever evaluated
FALSEnever evaluated
0
665 (algor_b->parameter &&
algor_b->parameterDescription
TRUEnever evaluated
FALSEnever evaluated
0
666 ASN1_TYPE_get(algor_b->parameter) != V_ASN1_NULL))
ASN1_TYPE_get(...arameter) != 5Description
TRUEnever evaluated
FALSEnever evaluated
0
667 goto err;
never executed: goto err;
0
668 }
never executed: end of block
0
669-
670 /* Compare octet strings. */-
671 ret = len_a == (unsigned) ASN1_STRING_length(b->hashed_msg) &&
len_a == (unsi...b->hashed_msg)Description
TRUEnever evaluated
FALSEnever evaluated
0
672 memcmp(imprint_a, ASN1_STRING_data(b->hashed_msg), len_a) == 0;
memcmp(imprint...), len_a) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
673-
674err:
code before this statement never executed: err:
0
675 if (!ret)
!retDescription
TRUEnever evaluated
FALSEnever evaluated
0
676 TSerror(TS_R_MESSAGE_IMPRINT_MISMATCH);
never executed: ERR_put_error(47,(0xfff),(103),__FILE__,676);
0
677 return ret;
never executed: return ret;
0
678}-
679-
680static int-
681TS_check_nonces(const ASN1_INTEGER *a, TS_TST_INFO *tst_info)-
682{-
683 const ASN1_INTEGER *b = TS_TST_INFO_get_nonce(tst_info);-
684-
685 /* Error if nonce is missing. */-
686 if (!b) {
!bDescription
TRUEnever evaluated
FALSEnever evaluated
0
687 TSerror(TS_R_NONCE_NOT_RETURNED);-
688 return 0;
never executed: return 0;
0
689 }-
690-
691 /* No error if a nonce is returned without being requested. */-
692 if (ASN1_INTEGER_cmp(a, b) != 0) {
ASN1_INTEGER_cmp(a, b) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
693 TSerror(TS_R_NONCE_MISMATCH);-
694 return 0;
never executed: return 0;
0
695 }-
696-
697 return 1;
never executed: return 1;
0
698}-
699-
700/* Check if the specified TSA name matches either the subject-
701 or one of the subject alternative names of the TSA certificate. */-
702static int-
703TS_check_signer_name(GENERAL_NAME *tsa_name, X509 *signer)-
704{-
705 STACK_OF(GENERAL_NAME) *gen_names = NULL;-
706 int idx = -1;-
707 int found = 0;-
708-
709 if (signer == NULL)
signer == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
710 return 0;
never executed: return 0;
0
711-
712 /* Check the subject name first. */-
713 if (tsa_name->type == GEN_DIRNAME &&
tsa_name->type == 4Description
TRUEnever evaluated
FALSEnever evaluated
0
714 X509_name_cmp(tsa_name->d.dirn, signer->cert_info->subject) == 0)
X509_NAME_cmp(...subject)) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
715 return 1;
never executed: return 1;
0
716-
717 /* Check all the alternative names. */-
718 gen_names = X509_get_ext_d2i(signer, NID_subject_alt_name,-
719 NULL, &idx);-
720 while (gen_names != NULL &&
gen_names != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
721 !(found = (TS_find_name(gen_names, tsa_name) >= 0))) {
!(found = (TS_...a_name) >= 0))Description
TRUEnever evaluated
FALSEnever evaluated
0
722 /* Get the next subject alternative name,-
723 although there should be no more than one. */-
724 GENERAL_NAMES_free(gen_names);-
725 gen_names = X509_get_ext_d2i(signer, NID_subject_alt_name,-
726 NULL, &idx);-
727 }
never executed: end of block
0
728 if (gen_names)
gen_namesDescription
TRUEnever evaluated
FALSEnever evaluated
0
729 GENERAL_NAMES_free(gen_names);
never executed: GENERAL_NAMES_free(gen_names);
0
730-
731 return found;
never executed: return found;
0
732}-
733-
734/* Returns 1 if name is in gen_names, 0 otherwise. */-
735static int-
736TS_find_name(STACK_OF(GENERAL_NAME) *gen_names, GENERAL_NAME *name)-
737{-
738 int i, found;-
739 for (i = 0, found = 0; !found && i < sk_GENERAL_NAME_num(gen_names);
!foundDescription
TRUEnever evaluated
FALSEnever evaluated
i < sk_num(((_...RAL_NAME*)0)))Description
TRUEnever evaluated
FALSEnever evaluated
0
740 ++i) {-
741 GENERAL_NAME *current = sk_GENERAL_NAME_value(gen_names, i);-
742 found = GENERAL_NAME_cmp(current, name) == 0;-
743 }
never executed: end of block
0
744 return found ? i - 1 : -1;
never executed: return found ? i - 1 : -1;
foundDescription
TRUEnever evaluated
FALSEnever evaluated
0
745}-
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