OpenSSL: update to 1.0.2a
[tomato.git] / release / src / router / openssl / crypto / ts / ts_rsp_sign.c
blobdb6ce3241f73d0769d754e8a4c9d965d7d973e68
1 /* crypto/ts/ts_resp_sign.c */
2 /*
3 * Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL project
4 * 2002.
5 */
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
11 * are met:
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
19 * distribution.
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
36 * acknowledgment:
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).
60 #include "cryptlib.h"
62 #if defined(OPENSSL_SYS_UNIX)
63 # include <sys/time.h>
64 #endif
66 #include <openssl/objects.h>
67 #include <openssl/ts.h>
68 #include <openssl/pkcs7.h>
70 /* Private function declarations. */
72 static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *, void *);
73 static int def_time_cb(struct TS_resp_ctx *, void *, long *sec, long *usec);
74 static int def_extension_cb(struct TS_resp_ctx *, X509_EXTENSION *, void *);
76 static void TS_RESP_CTX_init(TS_RESP_CTX *ctx);
77 static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx);
78 static int TS_RESP_check_request(TS_RESP_CTX *ctx);
79 static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx);
80 static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx,
81 ASN1_OBJECT *policy);
82 static int TS_RESP_process_extensions(TS_RESP_CTX *ctx);
83 static int TS_RESP_sign(TS_RESP_CTX *ctx);
85 static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert,
86 STACK_OF(X509) *certs);
87 static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed);
88 static int TS_TST_INFO_content_new(PKCS7 *p7);
89 static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc);
91 static ASN1_GENERALIZEDTIME
92 *TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *, long, long,
93 unsigned);
95 /* Default callbacks for response generation. */
97 static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *ctx, void *data)
99 ASN1_INTEGER *serial = ASN1_INTEGER_new();
100 if (!serial)
101 goto err;
102 if (!ASN1_INTEGER_set(serial, 1))
103 goto err;
104 return serial;
105 err:
106 TSerr(TS_F_DEF_SERIAL_CB, ERR_R_MALLOC_FAILURE);
107 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
108 "Error during serial number generation.");
109 return NULL;
112 #if defined(OPENSSL_SYS_UNIX)
114 /* Use the gettimeofday function call. */
115 static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
116 long *sec, long *usec)
118 struct timeval tv;
119 if (gettimeofday(&tv, NULL) != 0) {
120 TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
121 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
122 "Time is not available.");
123 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
124 return 0;
126 /* Return time to caller. */
127 *sec = tv.tv_sec;
128 *usec = tv.tv_usec;
130 return 1;
133 #else
135 /* Use the time function call that provides only seconds precision. */
136 static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
137 long *sec, long *usec)
139 time_t t;
140 if (time(&t) == (time_t)-1) {
141 TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
142 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
143 "Time is not available.");
144 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
145 return 0;
147 /* Return time to caller, only second precision. */
148 *sec = (long)t;
149 *usec = 0;
151 return 1;
154 #endif
156 static int def_extension_cb(struct TS_resp_ctx *ctx, X509_EXTENSION *ext,
157 void *data)
159 /* No extensions are processed here. */
160 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
161 "Unsupported extension.");
162 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_EXTENSION);
163 return 0;
166 /* TS_RESP_CTX management functions. */
168 TS_RESP_CTX *TS_RESP_CTX_new()
170 TS_RESP_CTX *ctx;
172 if (!(ctx = (TS_RESP_CTX *)OPENSSL_malloc(sizeof(TS_RESP_CTX)))) {
173 TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE);
174 return NULL;
176 memset(ctx, 0, sizeof(TS_RESP_CTX));
178 /* Setting default callbacks. */
179 ctx->serial_cb = def_serial_cb;
180 ctx->time_cb = def_time_cb;
181 ctx->extension_cb = def_extension_cb;
183 return ctx;
186 void TS_RESP_CTX_free(TS_RESP_CTX *ctx)
188 if (!ctx)
189 return;
191 X509_free(ctx->signer_cert);
192 EVP_PKEY_free(ctx->signer_key);
193 sk_X509_pop_free(ctx->certs, X509_free);
194 sk_ASN1_OBJECT_pop_free(ctx->policies, ASN1_OBJECT_free);
195 ASN1_OBJECT_free(ctx->default_policy);
196 sk_EVP_MD_free(ctx->mds); /* No EVP_MD_free method exists. */
197 ASN1_INTEGER_free(ctx->seconds);
198 ASN1_INTEGER_free(ctx->millis);
199 ASN1_INTEGER_free(ctx->micros);
200 OPENSSL_free(ctx);
203 int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX *ctx, X509 *signer)
205 if (X509_check_purpose(signer, X509_PURPOSE_TIMESTAMP_SIGN, 0) != 1) {
206 TSerr(TS_F_TS_RESP_CTX_SET_SIGNER_CERT,
207 TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE);
208 return 0;
210 if (ctx->signer_cert)
211 X509_free(ctx->signer_cert);
212 ctx->signer_cert = signer;
213 CRYPTO_add(&ctx->signer_cert->references, +1, CRYPTO_LOCK_X509);
214 return 1;
217 int TS_RESP_CTX_set_signer_key(TS_RESP_CTX *ctx, EVP_PKEY *key)
219 if (ctx->signer_key)
220 EVP_PKEY_free(ctx->signer_key);
221 ctx->signer_key = key;
222 CRYPTO_add(&ctx->signer_key->references, +1, CRYPTO_LOCK_EVP_PKEY);
224 return 1;
227 int TS_RESP_CTX_set_def_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *def_policy)
229 if (ctx->default_policy)
230 ASN1_OBJECT_free(ctx->default_policy);
231 if (!(ctx->default_policy = OBJ_dup(def_policy)))
232 goto err;
233 return 1;
234 err:
235 TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE);
236 return 0;
239 int TS_RESP_CTX_set_certs(TS_RESP_CTX *ctx, STACK_OF(X509) *certs)
242 if (ctx->certs) {
243 sk_X509_pop_free(ctx->certs, X509_free);
244 ctx->certs = NULL;
246 if (!certs)
247 return 1;
248 if (!(ctx->certs = X509_chain_up_ref(certs))) {
249 TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE);
250 return 0;
253 return 1;
256 int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *policy)
258 ASN1_OBJECT *copy = NULL;
260 /* Create new policy stack if necessary. */
261 if (!ctx->policies && !(ctx->policies = sk_ASN1_OBJECT_new_null()))
262 goto err;
263 if (!(copy = OBJ_dup(policy)))
264 goto err;
265 if (!sk_ASN1_OBJECT_push(ctx->policies, copy))
266 goto err;
268 return 1;
269 err:
270 TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE);
271 ASN1_OBJECT_free(copy);
272 return 0;
275 int TS_RESP_CTX_add_md(TS_RESP_CTX *ctx, const EVP_MD *md)
277 /* Create new md stack if necessary. */
278 if (!ctx->mds && !(ctx->mds = sk_EVP_MD_new_null()))
279 goto err;
280 /* Add the shared md, no copy needed. */
281 if (!sk_EVP_MD_push(ctx->mds, (EVP_MD *)md))
282 goto err;
284 return 1;
285 err:
286 TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE);
287 return 0;
290 #define TS_RESP_CTX_accuracy_free(ctx) \
291 ASN1_INTEGER_free(ctx->seconds); \
292 ctx->seconds = NULL; \
293 ASN1_INTEGER_free(ctx->millis); \
294 ctx->millis = NULL; \
295 ASN1_INTEGER_free(ctx->micros); \
296 ctx->micros = NULL;
298 int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx,
299 int secs, int millis, int micros)
302 TS_RESP_CTX_accuracy_free(ctx);
303 if (secs && (!(ctx->seconds = ASN1_INTEGER_new())
304 || !ASN1_INTEGER_set(ctx->seconds, secs)))
305 goto err;
306 if (millis && (!(ctx->millis = ASN1_INTEGER_new())
307 || !ASN1_INTEGER_set(ctx->millis, millis)))
308 goto err;
309 if (micros && (!(ctx->micros = ASN1_INTEGER_new())
310 || !ASN1_INTEGER_set(ctx->micros, micros)))
311 goto err;
313 return 1;
314 err:
315 TS_RESP_CTX_accuracy_free(ctx);
316 TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE);
317 return 0;
320 void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags)
322 ctx->flags |= flags;
325 void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data)
327 ctx->serial_cb = cb;
328 ctx->serial_cb_data = data;
331 void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data)
333 ctx->time_cb = cb;
334 ctx->time_cb_data = data;
337 void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx,
338 TS_extension_cb cb, void *data)
340 ctx->extension_cb = cb;
341 ctx->extension_cb_data = data;
344 int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx,
345 int status, const char *text)
347 TS_STATUS_INFO *si = NULL;
348 ASN1_UTF8STRING *utf8_text = NULL;
349 int ret = 0;
351 if (!(si = TS_STATUS_INFO_new()))
352 goto err;
353 if (!ASN1_INTEGER_set(si->status, status))
354 goto err;
355 if (text) {
356 if (!(utf8_text = ASN1_UTF8STRING_new())
357 || !ASN1_STRING_set(utf8_text, text, strlen(text)))
358 goto err;
359 if (!si->text && !(si->text = sk_ASN1_UTF8STRING_new_null()))
360 goto err;
361 if (!sk_ASN1_UTF8STRING_push(si->text, utf8_text))
362 goto err;
363 utf8_text = NULL; /* Ownership is lost. */
365 if (!TS_RESP_set_status_info(ctx->response, si))
366 goto err;
367 ret = 1;
368 err:
369 if (!ret)
370 TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE);
371 TS_STATUS_INFO_free(si);
372 ASN1_UTF8STRING_free(utf8_text);
373 return ret;
376 int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx,
377 int status, const char *text)
379 int ret = 1;
380 TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response);
382 if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED) {
383 /* Status has not been set, set it now. */
384 ret = TS_RESP_CTX_set_status_info(ctx, status, text);
386 return ret;
389 int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure)
391 TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response);
392 if (!si->failure_info && !(si->failure_info = ASN1_BIT_STRING_new()))
393 goto err;
394 if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1))
395 goto err;
396 return 1;
397 err:
398 TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE);
399 return 0;
402 TS_REQ *TS_RESP_CTX_get_request(TS_RESP_CTX *ctx)
404 return ctx->request;
407 TS_TST_INFO *TS_RESP_CTX_get_tst_info(TS_RESP_CTX *ctx)
409 return ctx->tst_info;
412 int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx,
413 unsigned precision)
415 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
416 return 0;
417 ctx->clock_precision_digits = precision;
418 return 1;
421 /* Main entry method of the response generation. */
422 TS_RESP *TS_RESP_create_response(TS_RESP_CTX *ctx, BIO *req_bio)
424 ASN1_OBJECT *policy;
425 TS_RESP *response;
426 int result = 0;
428 TS_RESP_CTX_init(ctx);
430 /* Creating the response object. */
431 if (!(ctx->response = TS_RESP_new())) {
432 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE);
433 goto end;
436 /* Parsing DER request. */
437 if (!(ctx->request = d2i_TS_REQ_bio(req_bio, NULL))) {
438 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
439 "Bad request format or " "system error.");
440 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
441 goto end;
444 /* Setting default status info. */
445 if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL))
446 goto end;
448 /* Checking the request format. */
449 if (!TS_RESP_check_request(ctx))
450 goto end;
452 /* Checking acceptable policies. */
453 if (!(policy = TS_RESP_get_policy(ctx)))
454 goto end;
456 /* Creating the TS_TST_INFO object. */
457 if (!(ctx->tst_info = TS_RESP_create_tst_info(ctx, policy)))
458 goto end;
460 /* Processing extensions. */
461 if (!TS_RESP_process_extensions(ctx))
462 goto end;
464 /* Generating the signature. */
465 if (!TS_RESP_sign(ctx))
466 goto end;
468 /* Everything was successful. */
469 result = 1;
470 end:
471 if (!result) {
472 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR);
473 if (ctx->response != NULL) {
474 if (TS_RESP_CTX_set_status_info_cond(ctx,
475 TS_STATUS_REJECTION,
476 "Error during response "
477 "generation.") == 0) {
478 TS_RESP_free(ctx->response);
479 ctx->response = NULL;
483 response = ctx->response;
484 ctx->response = NULL; /* Ownership will be returned to caller. */
485 TS_RESP_CTX_cleanup(ctx);
486 return response;
489 /* Initializes the variable part of the context. */
490 static void TS_RESP_CTX_init(TS_RESP_CTX *ctx)
492 ctx->request = NULL;
493 ctx->response = NULL;
494 ctx->tst_info = NULL;
497 /* Cleans up the variable part of the context. */
498 static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx)
500 TS_REQ_free(ctx->request);
501 ctx->request = NULL;
502 TS_RESP_free(ctx->response);
503 ctx->response = NULL;
504 TS_TST_INFO_free(ctx->tst_info);
505 ctx->tst_info = NULL;
508 /* Checks the format and content of the request. */
509 static int TS_RESP_check_request(TS_RESP_CTX *ctx)
511 TS_REQ *request = ctx->request;
512 TS_MSG_IMPRINT *msg_imprint;
513 X509_ALGOR *md_alg;
514 int md_alg_id;
515 const ASN1_OCTET_STRING *digest;
516 EVP_MD *md = NULL;
517 int i;
519 /* Checking request version. */
520 if (TS_REQ_get_version(request) != 1) {
521 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
522 "Bad request version.");
523 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_REQUEST);
524 return 0;
527 /* Checking message digest algorithm. */
528 msg_imprint = TS_REQ_get_msg_imprint(request);
529 md_alg = TS_MSG_IMPRINT_get_algo(msg_imprint);
530 md_alg_id = OBJ_obj2nid(md_alg->algorithm);
531 for (i = 0; !md && i < sk_EVP_MD_num(ctx->mds); ++i) {
532 EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i);
533 if (md_alg_id == EVP_MD_type(current_md))
534 md = current_md;
536 if (!md) {
537 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
538 "Message digest algorithm is "
539 "not supported.");
540 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
541 return 0;
544 /* No message digest takes parameter. */
545 if (md_alg->parameter && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL) {
546 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
547 "Superfluous message digest "
548 "parameter.");
549 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
550 return 0;
552 /* Checking message digest size. */
553 digest = TS_MSG_IMPRINT_get_msg(msg_imprint);
554 if (digest->length != EVP_MD_size(md)) {
555 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
556 "Bad message digest.");
557 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
558 return 0;
561 return 1;
564 /* Returns the TSA policy based on the requested and acceptable policies. */
565 static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx)
567 ASN1_OBJECT *requested = TS_REQ_get_policy_id(ctx->request);
568 ASN1_OBJECT *policy = NULL;
569 int i;
571 if (ctx->default_policy == NULL) {
572 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER);
573 return NULL;
576 * Return the default policy if none is requested or the default is
577 * requested.
579 if (!requested || !OBJ_cmp(requested, ctx->default_policy))
580 policy = ctx->default_policy;
582 /* Check if the policy is acceptable. */
583 for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i) {
584 ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i);
585 if (!OBJ_cmp(requested, current))
586 policy = current;
588 if (!policy) {
589 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY);
590 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
591 "Requested policy is not " "supported.");
592 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY);
594 return policy;
597 /* Creates the TS_TST_INFO object based on the settings of the context. */
598 static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx,
599 ASN1_OBJECT *policy)
601 int result = 0;
602 TS_TST_INFO *tst_info = NULL;
603 ASN1_INTEGER *serial = NULL;
604 ASN1_GENERALIZEDTIME *asn1_time = NULL;
605 long sec, usec;
606 TS_ACCURACY *accuracy = NULL;
607 const ASN1_INTEGER *nonce;
608 GENERAL_NAME *tsa_name = NULL;
610 if (!(tst_info = TS_TST_INFO_new()))
611 goto end;
612 if (!TS_TST_INFO_set_version(tst_info, 1))
613 goto end;
614 if (!TS_TST_INFO_set_policy_id(tst_info, policy))
615 goto end;
616 if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint))
617 goto end;
618 if (!(serial = (*ctx->serial_cb) (ctx, ctx->serial_cb_data))
619 || !TS_TST_INFO_set_serial(tst_info, serial))
620 goto end;
621 if (!(*ctx->time_cb) (ctx, ctx->time_cb_data, &sec, &usec)
622 || !(asn1_time = TS_RESP_set_genTime_with_precision(NULL,
623 sec, usec,
624 ctx->clock_precision_digits))
625 || !TS_TST_INFO_set_time(tst_info, asn1_time))
626 goto end;
628 /* Setting accuracy if needed. */
629 if ((ctx->seconds || ctx->millis || ctx->micros)
630 && !(accuracy = TS_ACCURACY_new()))
631 goto end;
633 if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds))
634 goto end;
635 if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis))
636 goto end;
637 if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros))
638 goto end;
639 if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy))
640 goto end;
642 /* Setting ordering. */
643 if ((ctx->flags & TS_ORDERING)
644 && !TS_TST_INFO_set_ordering(tst_info, 1))
645 goto end;
647 /* Setting nonce if needed. */
648 if ((nonce = TS_REQ_get_nonce(ctx->request)) != NULL
649 && !TS_TST_INFO_set_nonce(tst_info, nonce))
650 goto end;
652 /* Setting TSA name to subject of signer certificate. */
653 if (ctx->flags & TS_TSA_NAME) {
654 if (!(tsa_name = GENERAL_NAME_new()))
655 goto end;
656 tsa_name->type = GEN_DIRNAME;
657 tsa_name->d.dirn =
658 X509_NAME_dup(ctx->signer_cert->cert_info->subject);
659 if (!tsa_name->d.dirn)
660 goto end;
661 if (!TS_TST_INFO_set_tsa(tst_info, tsa_name))
662 goto end;
665 result = 1;
666 end:
667 if (!result) {
668 TS_TST_INFO_free(tst_info);
669 tst_info = NULL;
670 TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR);
671 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
672 "Error during TSTInfo "
673 "generation.");
675 GENERAL_NAME_free(tsa_name);
676 TS_ACCURACY_free(accuracy);
677 ASN1_GENERALIZEDTIME_free(asn1_time);
678 ASN1_INTEGER_free(serial);
680 return tst_info;
683 /* Processing the extensions of the request. */
684 static int TS_RESP_process_extensions(TS_RESP_CTX *ctx)
686 STACK_OF(X509_EXTENSION) *exts = TS_REQ_get_exts(ctx->request);
687 int i;
688 int ok = 1;
690 for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i) {
691 X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
693 * XXXXX The last argument was previously (void *)ctx->extension_cb,
694 * but ISO C doesn't permit converting a function pointer to void *.
695 * For lack of better information, I'm placing a NULL there instead.
696 * The callback can pick its own address out from the ctx anyway...
698 ok = (*ctx->extension_cb) (ctx, ext, NULL);
701 return ok;
704 /* Functions for signing the TS_TST_INFO structure of the context. */
705 static int TS_RESP_sign(TS_RESP_CTX *ctx)
707 int ret = 0;
708 PKCS7 *p7 = NULL;
709 PKCS7_SIGNER_INFO *si;
710 STACK_OF(X509) *certs; /* Certificates to include in sc. */
711 ESS_SIGNING_CERT *sc = NULL;
712 ASN1_OBJECT *oid;
713 BIO *p7bio = NULL;
714 int i;
716 /* Check if signcert and pkey match. */
717 if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) {
718 TSerr(TS_F_TS_RESP_SIGN, TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
719 goto err;
722 /* Create a new PKCS7 signed object. */
723 if (!(p7 = PKCS7_new())) {
724 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
725 goto err;
727 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
728 goto err;
730 /* Force SignedData version to be 3 instead of the default 1. */
731 if (!ASN1_INTEGER_set(p7->d.sign->version, 3))
732 goto err;
734 /* Add signer certificate and optional certificate chain. */
735 if (TS_REQ_get_cert_req(ctx->request)) {
736 PKCS7_add_certificate(p7, ctx->signer_cert);
737 if (ctx->certs) {
738 for (i = 0; i < sk_X509_num(ctx->certs); ++i) {
739 X509 *cert = sk_X509_value(ctx->certs, i);
740 PKCS7_add_certificate(p7, cert);
745 /* Add a new signer info. */
746 if (!(si = PKCS7_add_signature(p7, ctx->signer_cert,
747 ctx->signer_key, EVP_sha1()))) {
748 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR);
749 goto err;
752 /* Add content type signed attribute to the signer info. */
753 oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
754 if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
755 V_ASN1_OBJECT, oid)) {
756 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR);
757 goto err;
761 * Create the ESS SigningCertificate attribute which contains the signer
762 * certificate id and optionally the certificate chain.
764 certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL;
765 if (!(sc = ESS_SIGNING_CERT_new_init(ctx->signer_cert, certs)))
766 goto err;
768 /* Add SigningCertificate signed attribute to the signer info. */
769 if (!ESS_add_signing_cert(si, sc)) {
770 TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR);
771 goto err;
774 /* Add a new empty NID_id_smime_ct_TSTInfo encapsulated content. */
775 if (!TS_TST_INFO_content_new(p7))
776 goto err;
778 /* Add the DER encoded tst_info to the PKCS7 structure. */
779 if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
780 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
781 goto err;
784 /* Convert tst_info to DER. */
785 if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info)) {
786 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
787 goto err;
790 /* Create the signature and add it to the signer info. */
791 if (!PKCS7_dataFinal(p7, p7bio)) {
792 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
793 goto err;
796 /* Set new PKCS7 and TST_INFO objects. */
797 TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info);
798 p7 = NULL; /* Ownership is lost. */
799 ctx->tst_info = NULL; /* Ownership is lost. */
801 ret = 1;
802 err:
803 if (!ret)
804 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
805 "Error during signature "
806 "generation.");
807 BIO_free_all(p7bio);
808 ESS_SIGNING_CERT_free(sc);
809 PKCS7_free(p7);
810 return ret;
813 static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert,
814 STACK_OF(X509) *certs)
816 ESS_CERT_ID *cid;
817 ESS_SIGNING_CERT *sc = NULL;
818 int i;
820 /* Creating the ESS_CERT_ID stack. */
821 if (!(sc = ESS_SIGNING_CERT_new()))
822 goto err;
823 if (!sc->cert_ids && !(sc->cert_ids = sk_ESS_CERT_ID_new_null()))
824 goto err;
826 /* Adding the signing certificate id. */
827 if (!(cid = ESS_CERT_ID_new_init(signcert, 0))
828 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
829 goto err;
830 /* Adding the certificate chain ids. */
831 for (i = 0; i < sk_X509_num(certs); ++i) {
832 X509 *cert = sk_X509_value(certs, i);
833 if (!(cid = ESS_CERT_ID_new_init(cert, 1))
834 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
835 goto err;
838 return sc;
839 err:
840 ESS_SIGNING_CERT_free(sc);
841 TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE);
842 return NULL;
845 static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed)
847 ESS_CERT_ID *cid = NULL;
848 GENERAL_NAME *name = NULL;
850 /* Recompute SHA1 hash of certificate if necessary (side effect). */
851 X509_check_purpose(cert, -1, 0);
853 if (!(cid = ESS_CERT_ID_new()))
854 goto err;
855 if (!ASN1_OCTET_STRING_set(cid->hash, cert->sha1_hash,
856 sizeof(cert->sha1_hash)))
857 goto err;
859 /* Setting the issuer/serial if requested. */
860 if (issuer_needed) {
861 /* Creating issuer/serial structure. */
862 if (!cid->issuer_serial
863 && !(cid->issuer_serial = ESS_ISSUER_SERIAL_new()))
864 goto err;
865 /* Creating general name from the certificate issuer. */
866 if (!(name = GENERAL_NAME_new()))
867 goto err;
868 name->type = GEN_DIRNAME;
869 if (!(name->d.dirn = X509_NAME_dup(cert->cert_info->issuer)))
870 goto err;
871 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
872 goto err;
873 name = NULL; /* Ownership is lost. */
874 /* Setting the serial number. */
875 ASN1_INTEGER_free(cid->issuer_serial->serial);
876 if (!(cid->issuer_serial->serial =
877 ASN1_INTEGER_dup(cert->cert_info->serialNumber)))
878 goto err;
881 return cid;
882 err:
883 GENERAL_NAME_free(name);
884 ESS_CERT_ID_free(cid);
885 TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE);
886 return NULL;
889 static int TS_TST_INFO_content_new(PKCS7 *p7)
891 PKCS7 *ret = NULL;
892 ASN1_OCTET_STRING *octet_string = NULL;
894 /* Create new encapsulated NID_id_smime_ct_TSTInfo content. */
895 if (!(ret = PKCS7_new()))
896 goto err;
897 if (!(ret->d.other = ASN1_TYPE_new()))
898 goto err;
899 ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
900 if (!(octet_string = ASN1_OCTET_STRING_new()))
901 goto err;
902 ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string);
903 octet_string = NULL;
905 /* Add encapsulated content to signed PKCS7 structure. */
906 if (!PKCS7_set_content(p7, ret))
907 goto err;
909 return 1;
910 err:
911 ASN1_OCTET_STRING_free(octet_string);
912 PKCS7_free(ret);
913 return 0;
916 static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc)
918 ASN1_STRING *seq = NULL;
919 unsigned char *p, *pp = NULL;
920 int len;
922 len = i2d_ESS_SIGNING_CERT(sc, NULL);
923 if (!(pp = (unsigned char *)OPENSSL_malloc(len))) {
924 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
925 goto err;
927 p = pp;
928 i2d_ESS_SIGNING_CERT(sc, &p);
929 if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len)) {
930 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
931 goto err;
933 OPENSSL_free(pp);
934 pp = NULL;
935 return PKCS7_add_signed_attribute(si,
936 NID_id_smime_aa_signingCertificate,
937 V_ASN1_SEQUENCE, seq);
938 err:
939 ASN1_STRING_free(seq);
940 OPENSSL_free(pp);
942 return 0;
945 static ASN1_GENERALIZEDTIME
946 *TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *asn1_time,
947 long sec, long usec, unsigned precision)
949 time_t time_sec = (time_t)sec;
950 struct tm *tm = NULL;
951 char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS];
952 char *p = genTime_str;
953 char *p_end = genTime_str + sizeof(genTime_str);
955 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
956 goto err;
958 if (!(tm = gmtime(&time_sec)))
959 goto err;
962 * Put "genTime_str" in GeneralizedTime format. We work around the
963 * restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST
964 * NOT include fractional seconds") and OpenSSL related functions to
965 * meet the rfc3161 requirement: "GeneralizedTime syntax can include
966 * fraction-of-second details".
968 p += BIO_snprintf(p, p_end - p,
969 "%04d%02d%02d%02d%02d%02d",
970 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
971 tm->tm_hour, tm->tm_min, tm->tm_sec);
972 if (precision > 0) {
973 /* Add fraction of seconds (leave space for dot and null). */
974 BIO_snprintf(p, 2 + precision, ".%06ld", usec);
976 * We cannot use the snprintf return value, because it might have
977 * been truncated.
979 p += strlen(p);
982 * To make things a bit harder, X.690 | ISO/IEC 8825-1 provides the
983 * following restrictions for a DER-encoding, which OpenSSL
984 * (specifically ASN1_GENERALIZEDTIME_check() function) doesn't
985 * support: "The encoding MUST terminate with a "Z" (which means
986 * "Zulu" time). The decimal point element, if present, MUST be the
987 * point option ".". The fractional-seconds elements, if present,
988 * MUST omit all trailing 0's; if the elements correspond to 0, they
989 * MUST be wholly omitted, and the decimal point element also MUST be
990 * omitted."
993 * Remove trailing zeros. The dot guarantees the exit condition of
994 * this loop even if all the digits are zero.
996 while (*--p == '0')
998 * empty
999 */ ;
1000 /* p points to either the dot or the last non-zero digit. */
1001 if (*p != '.')
1002 ++p;
1004 /* Add the trailing Z and the terminating null. */
1005 *p++ = 'Z';
1006 *p++ = '\0';
1008 /* Now call OpenSSL to check and set our genTime value */
1009 if (!asn1_time && !(asn1_time = M_ASN1_GENERALIZEDTIME_new()))
1010 goto err;
1011 if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str)) {
1012 ASN1_GENERALIZEDTIME_free(asn1_time);
1013 goto err;
1016 return asn1_time;
1017 err:
1018 TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME);
1019 return NULL;