1 /* crypto/ts/ts_resp_sign.c */
3 * Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
62 #if defined(OPENSSL_SYS_UNIX)
63 # include <sys/time.h>
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,
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,
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();
102 if (!ASN1_INTEGER_set(serial, 1))
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.");
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)
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);
126 /* Return time to caller. */
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)
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);
147 /* Return time to caller, only second precision. */
156 static int def_extension_cb(struct TS_resp_ctx *ctx, X509_EXTENSION *ext,
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);
166 /* TS_RESP_CTX management functions. */
168 TS_RESP_CTX *TS_RESP_CTX_new()
172 if (!(ctx = OPENSSL_malloc(sizeof(TS_RESP_CTX)))) {
173 TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE);
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;
186 void TS_RESP_CTX_free(TS_RESP_CTX *ctx)
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);
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);
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);
217 int TS_RESP_CTX_set_signer_key(TS_RESP_CTX *ctx, EVP_PKEY *key)
219 EVP_PKEY_free(ctx->signer_key);
220 ctx->signer_key = key;
221 CRYPTO_add(&ctx->signer_key->references, +1, CRYPTO_LOCK_EVP_PKEY);
226 int TS_RESP_CTX_set_def_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *def_policy)
228 ASN1_OBJECT_free(ctx->default_policy);
229 if (!(ctx->default_policy = OBJ_dup(def_policy)))
233 TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE);
237 int TS_RESP_CTX_set_certs(TS_RESP_CTX *ctx, STACK_OF(X509) *certs)
241 sk_X509_pop_free(ctx->certs, X509_free);
246 if (!(ctx->certs = X509_chain_up_ref(certs))) {
247 TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE);
254 int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *policy)
256 ASN1_OBJECT *copy = NULL;
258 /* Create new policy stack if necessary. */
259 if (!ctx->policies && !(ctx->policies = sk_ASN1_OBJECT_new_null()))
261 if (!(copy = OBJ_dup(policy)))
263 if (!sk_ASN1_OBJECT_push(ctx->policies, copy))
268 TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE);
269 ASN1_OBJECT_free(copy);
273 int TS_RESP_CTX_add_md(TS_RESP_CTX *ctx, const EVP_MD *md)
275 /* Create new md stack if necessary. */
276 if (!ctx->mds && !(ctx->mds = sk_EVP_MD_new_null()))
278 /* Add the shared md, no copy needed. */
279 if (!sk_EVP_MD_push(ctx->mds, (EVP_MD *)md))
284 TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE);
288 #define TS_RESP_CTX_accuracy_free(ctx) \
289 ASN1_INTEGER_free(ctx->seconds); \
290 ctx->seconds = NULL; \
291 ASN1_INTEGER_free(ctx->millis); \
292 ctx->millis = NULL; \
293 ASN1_INTEGER_free(ctx->micros); \
296 int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx,
297 int secs, int millis, int micros)
300 TS_RESP_CTX_accuracy_free(ctx);
301 if (secs && (!(ctx->seconds = ASN1_INTEGER_new())
302 || !ASN1_INTEGER_set(ctx->seconds, secs)))
304 if (millis && (!(ctx->millis = ASN1_INTEGER_new())
305 || !ASN1_INTEGER_set(ctx->millis, millis)))
307 if (micros && (!(ctx->micros = ASN1_INTEGER_new())
308 || !ASN1_INTEGER_set(ctx->micros, micros)))
313 TS_RESP_CTX_accuracy_free(ctx);
314 TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE);
318 void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags)
323 void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data)
326 ctx->serial_cb_data = data;
329 void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data)
332 ctx->time_cb_data = data;
335 void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx,
336 TS_extension_cb cb, void *data)
338 ctx->extension_cb = cb;
339 ctx->extension_cb_data = data;
342 int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx,
343 int status, const char *text)
345 TS_STATUS_INFO *si = NULL;
346 ASN1_UTF8STRING *utf8_text = NULL;
349 if (!(si = TS_STATUS_INFO_new()))
351 if (!ASN1_INTEGER_set(si->status, status))
354 if (!(utf8_text = ASN1_UTF8STRING_new())
355 || !ASN1_STRING_set(utf8_text, text, strlen(text)))
357 if (!si->text && !(si->text = sk_ASN1_UTF8STRING_new_null()))
359 if (!sk_ASN1_UTF8STRING_push(si->text, utf8_text))
361 utf8_text = NULL; /* Ownership is lost. */
363 if (!TS_RESP_set_status_info(ctx->response, si))
368 TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE);
369 TS_STATUS_INFO_free(si);
370 ASN1_UTF8STRING_free(utf8_text);
374 int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx,
375 int status, const char *text)
378 TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response);
380 if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED) {
381 /* Status has not been set, set it now. */
382 ret = TS_RESP_CTX_set_status_info(ctx, status, text);
387 int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure)
389 TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response);
390 if (!si->failure_info && !(si->failure_info = ASN1_BIT_STRING_new()))
392 if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1))
396 TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE);
400 TS_REQ *TS_RESP_CTX_get_request(TS_RESP_CTX *ctx)
405 TS_TST_INFO *TS_RESP_CTX_get_tst_info(TS_RESP_CTX *ctx)
407 return ctx->tst_info;
410 int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx,
413 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
415 ctx->clock_precision_digits = precision;
419 /* Main entry method of the response generation. */
420 TS_RESP *TS_RESP_create_response(TS_RESP_CTX *ctx, BIO *req_bio)
426 TS_RESP_CTX_init(ctx);
428 /* Creating the response object. */
429 if (!(ctx->response = TS_RESP_new())) {
430 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE);
434 /* Parsing DER request. */
435 if (!(ctx->request = d2i_TS_REQ_bio(req_bio, NULL))) {
436 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
437 "Bad request format or " "system error.");
438 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
442 /* Setting default status info. */
443 if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL))
446 /* Checking the request format. */
447 if (!TS_RESP_check_request(ctx))
450 /* Checking acceptable policies. */
451 if (!(policy = TS_RESP_get_policy(ctx)))
454 /* Creating the TS_TST_INFO object. */
455 if (!(ctx->tst_info = TS_RESP_create_tst_info(ctx, policy)))
458 /* Processing extensions. */
459 if (!TS_RESP_process_extensions(ctx))
462 /* Generating the signature. */
463 if (!TS_RESP_sign(ctx))
466 /* Everything was successful. */
470 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR);
471 if (ctx->response != NULL) {
472 if (TS_RESP_CTX_set_status_info_cond(ctx,
474 "Error during response "
475 "generation.") == 0) {
476 TS_RESP_free(ctx->response);
477 ctx->response = NULL;
481 response = ctx->response;
482 ctx->response = NULL; /* Ownership will be returned to caller. */
483 TS_RESP_CTX_cleanup(ctx);
487 /* Initializes the variable part of the context. */
488 static void TS_RESP_CTX_init(TS_RESP_CTX *ctx)
491 ctx->response = NULL;
492 ctx->tst_info = NULL;
495 /* Cleans up the variable part of the context. */
496 static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx)
498 TS_REQ_free(ctx->request);
500 TS_RESP_free(ctx->response);
501 ctx->response = NULL;
502 TS_TST_INFO_free(ctx->tst_info);
503 ctx->tst_info = NULL;
506 /* Checks the format and content of the request. */
507 static int TS_RESP_check_request(TS_RESP_CTX *ctx)
509 TS_REQ *request = ctx->request;
510 TS_MSG_IMPRINT *msg_imprint;
513 const ASN1_OCTET_STRING *digest;
517 /* Checking request version. */
518 if (TS_REQ_get_version(request) != 1) {
519 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
520 "Bad request version.");
521 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_REQUEST);
525 /* Checking message digest algorithm. */
526 msg_imprint = TS_REQ_get_msg_imprint(request);
527 md_alg = TS_MSG_IMPRINT_get_algo(msg_imprint);
528 md_alg_id = OBJ_obj2nid(md_alg->algorithm);
529 for (i = 0; !md && i < sk_EVP_MD_num(ctx->mds); ++i) {
530 EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i);
531 if (md_alg_id == EVP_MD_type(current_md))
535 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
536 "Message digest algorithm is "
538 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
542 /* No message digest takes parameter. */
543 if (md_alg->parameter && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL) {
544 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
545 "Superfluous message digest "
547 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
550 /* Checking message digest size. */
551 digest = TS_MSG_IMPRINT_get_msg(msg_imprint);
552 if (digest->length != EVP_MD_size(md)) {
553 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
554 "Bad message digest.");
555 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
562 /* Returns the TSA policy based on the requested and acceptable policies. */
563 static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx)
565 ASN1_OBJECT *requested = TS_REQ_get_policy_id(ctx->request);
566 ASN1_OBJECT *policy = NULL;
569 if (ctx->default_policy == NULL) {
570 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER);
574 * Return the default policy if none is requested or the default is
577 if (!requested || !OBJ_cmp(requested, ctx->default_policy))
578 policy = ctx->default_policy;
580 /* Check if the policy is acceptable. */
581 for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i) {
582 ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i);
583 if (!OBJ_cmp(requested, current))
587 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY);
588 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
589 "Requested policy is not " "supported.");
590 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY);
595 /* Creates the TS_TST_INFO object based on the settings of the context. */
596 static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx,
600 TS_TST_INFO *tst_info = NULL;
601 ASN1_INTEGER *serial = NULL;
602 ASN1_GENERALIZEDTIME *asn1_time = NULL;
604 TS_ACCURACY *accuracy = NULL;
605 const ASN1_INTEGER *nonce;
606 GENERAL_NAME *tsa_name = NULL;
608 if (!(tst_info = TS_TST_INFO_new()))
610 if (!TS_TST_INFO_set_version(tst_info, 1))
612 if (!TS_TST_INFO_set_policy_id(tst_info, policy))
614 if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint))
616 if (!(serial = (*ctx->serial_cb) (ctx, ctx->serial_cb_data))
617 || !TS_TST_INFO_set_serial(tst_info, serial))
619 if (!(*ctx->time_cb) (ctx, ctx->time_cb_data, &sec, &usec)
620 || !(asn1_time = TS_RESP_set_genTime_with_precision(NULL,
622 ctx->clock_precision_digits))
623 || !TS_TST_INFO_set_time(tst_info, asn1_time))
626 /* Setting accuracy if needed. */
627 if ((ctx->seconds || ctx->millis || ctx->micros)
628 && !(accuracy = TS_ACCURACY_new()))
631 if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds))
633 if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis))
635 if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros))
637 if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy))
640 /* Setting ordering. */
641 if ((ctx->flags & TS_ORDERING)
642 && !TS_TST_INFO_set_ordering(tst_info, 1))
645 /* Setting nonce if needed. */
646 if ((nonce = TS_REQ_get_nonce(ctx->request)) != NULL
647 && !TS_TST_INFO_set_nonce(tst_info, nonce))
650 /* Setting TSA name to subject of signer certificate. */
651 if (ctx->flags & TS_TSA_NAME) {
652 if (!(tsa_name = GENERAL_NAME_new()))
654 tsa_name->type = GEN_DIRNAME;
656 X509_NAME_dup(ctx->signer_cert->cert_info->subject);
657 if (!tsa_name->d.dirn)
659 if (!TS_TST_INFO_set_tsa(tst_info, tsa_name))
666 TS_TST_INFO_free(tst_info);
668 TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR);
669 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
670 "Error during TSTInfo "
673 GENERAL_NAME_free(tsa_name);
674 TS_ACCURACY_free(accuracy);
675 ASN1_GENERALIZEDTIME_free(asn1_time);
676 ASN1_INTEGER_free(serial);
681 /* Processing the extensions of the request. */
682 static int TS_RESP_process_extensions(TS_RESP_CTX *ctx)
684 STACK_OF(X509_EXTENSION) *exts = TS_REQ_get_exts(ctx->request);
688 for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i) {
689 X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
691 * XXXXX The last argument was previously (void *)ctx->extension_cb,
692 * but ISO C doesn't permit converting a function pointer to void *.
693 * For lack of better information, I'm placing a NULL there instead.
694 * The callback can pick its own address out from the ctx anyway...
696 ok = (*ctx->extension_cb) (ctx, ext, NULL);
702 /* Functions for signing the TS_TST_INFO structure of the context. */
703 static int TS_RESP_sign(TS_RESP_CTX *ctx)
707 PKCS7_SIGNER_INFO *si;
708 STACK_OF(X509) *certs; /* Certificates to include in sc. */
709 ESS_SIGNING_CERT *sc = NULL;
714 /* Check if signcert and pkey match. */
715 if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) {
716 TSerr(TS_F_TS_RESP_SIGN, TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
720 /* Create a new PKCS7 signed object. */
721 if (!(p7 = PKCS7_new())) {
722 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
725 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
728 /* Force SignedData version to be 3 instead of the default 1. */
729 if (!ASN1_INTEGER_set(p7->d.sign->version, 3))
732 /* Add signer certificate and optional certificate chain. */
733 if (TS_REQ_get_cert_req(ctx->request)) {
734 PKCS7_add_certificate(p7, ctx->signer_cert);
736 for (i = 0; i < sk_X509_num(ctx->certs); ++i) {
737 X509 *cert = sk_X509_value(ctx->certs, i);
738 PKCS7_add_certificate(p7, cert);
743 /* Add a new signer info. */
744 if (!(si = PKCS7_add_signature(p7, ctx->signer_cert,
745 ctx->signer_key, EVP_sha1()))) {
746 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR);
750 /* Add content type signed attribute to the signer info. */
751 oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
752 if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
753 V_ASN1_OBJECT, oid)) {
754 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR);
759 * Create the ESS SigningCertificate attribute which contains the signer
760 * certificate id and optionally the certificate chain.
762 certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL;
763 if (!(sc = ESS_SIGNING_CERT_new_init(ctx->signer_cert, certs)))
766 /* Add SigningCertificate signed attribute to the signer info. */
767 if (!ESS_add_signing_cert(si, sc)) {
768 TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR);
772 /* Add a new empty NID_id_smime_ct_TSTInfo encapsulated content. */
773 if (!TS_TST_INFO_content_new(p7))
776 /* Add the DER encoded tst_info to the PKCS7 structure. */
777 if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
778 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
782 /* Convert tst_info to DER. */
783 if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info)) {
784 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
788 /* Create the signature and add it to the signer info. */
789 if (!PKCS7_dataFinal(p7, p7bio)) {
790 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
794 /* Set new PKCS7 and TST_INFO objects. */
795 TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info);
796 p7 = NULL; /* Ownership is lost. */
797 ctx->tst_info = NULL; /* Ownership is lost. */
802 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
803 "Error during signature "
806 ESS_SIGNING_CERT_free(sc);
811 static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert,
812 STACK_OF(X509) *certs)
815 ESS_SIGNING_CERT *sc = NULL;
818 /* Creating the ESS_CERT_ID stack. */
819 if (!(sc = ESS_SIGNING_CERT_new()))
821 if (!sc->cert_ids && !(sc->cert_ids = sk_ESS_CERT_ID_new_null()))
824 /* Adding the signing certificate id. */
825 if (!(cid = ESS_CERT_ID_new_init(signcert, 0))
826 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
828 /* Adding the certificate chain ids. */
829 for (i = 0; i < sk_X509_num(certs); ++i) {
830 X509 *cert = sk_X509_value(certs, i);
831 if (!(cid = ESS_CERT_ID_new_init(cert, 1))
832 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
838 ESS_SIGNING_CERT_free(sc);
839 TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE);
843 static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed)
845 ESS_CERT_ID *cid = NULL;
846 GENERAL_NAME *name = NULL;
848 /* Recompute SHA1 hash of certificate if necessary (side effect). */
849 X509_check_purpose(cert, -1, 0);
851 if (!(cid = ESS_CERT_ID_new()))
853 if (!ASN1_OCTET_STRING_set(cid->hash, cert->sha1_hash,
854 sizeof(cert->sha1_hash)))
857 /* Setting the issuer/serial if requested. */
859 /* Creating issuer/serial structure. */
860 if (!cid->issuer_serial
861 && !(cid->issuer_serial = ESS_ISSUER_SERIAL_new()))
863 /* Creating general name from the certificate issuer. */
864 if (!(name = GENERAL_NAME_new()))
866 name->type = GEN_DIRNAME;
867 if (!(name->d.dirn = X509_NAME_dup(cert->cert_info->issuer)))
869 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
871 name = NULL; /* Ownership is lost. */
872 /* Setting the serial number. */
873 ASN1_INTEGER_free(cid->issuer_serial->serial);
874 if (!(cid->issuer_serial->serial =
875 ASN1_INTEGER_dup(cert->cert_info->serialNumber)))
881 GENERAL_NAME_free(name);
882 ESS_CERT_ID_free(cid);
883 TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE);
887 static int TS_TST_INFO_content_new(PKCS7 *p7)
890 ASN1_OCTET_STRING *octet_string = NULL;
892 /* Create new encapsulated NID_id_smime_ct_TSTInfo content. */
893 if (!(ret = PKCS7_new()))
895 if (!(ret->d.other = ASN1_TYPE_new()))
897 ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
898 if (!(octet_string = ASN1_OCTET_STRING_new()))
900 ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string);
903 /* Add encapsulated content to signed PKCS7 structure. */
904 if (!PKCS7_set_content(p7, ret))
909 ASN1_OCTET_STRING_free(octet_string);
914 static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc)
916 ASN1_STRING *seq = NULL;
917 unsigned char *p, *pp = NULL;
920 len = i2d_ESS_SIGNING_CERT(sc, NULL);
921 if (!(pp = OPENSSL_malloc(len))) {
922 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
926 i2d_ESS_SIGNING_CERT(sc, &p);
927 if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len)) {
928 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
933 return PKCS7_add_signed_attribute(si,
934 NID_id_smime_aa_signingCertificate,
935 V_ASN1_SEQUENCE, seq);
937 ASN1_STRING_free(seq);
943 static ASN1_GENERALIZEDTIME
944 *TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *asn1_time,
945 long sec, long usec, unsigned precision)
947 time_t time_sec = (time_t)sec;
948 struct tm *tm = NULL;
949 char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS];
950 char *p = genTime_str;
951 char *p_end = genTime_str + sizeof(genTime_str);
953 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
956 if (!(tm = gmtime(&time_sec)))
960 * Put "genTime_str" in GeneralizedTime format. We work around the
961 * restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST
962 * NOT include fractional seconds") and OpenSSL related functions to
963 * meet the rfc3161 requirement: "GeneralizedTime syntax can include
964 * fraction-of-second details".
966 p += BIO_snprintf(p, p_end - p,
967 "%04d%02d%02d%02d%02d%02d",
968 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
969 tm->tm_hour, tm->tm_min, tm->tm_sec);
971 /* Add fraction of seconds (leave space for dot and null). */
972 BIO_snprintf(p, 2 + precision, ".%06ld", usec);
974 * We cannot use the snprintf return value, because it might have
980 * To make things a bit harder, X.690 | ISO/IEC 8825-1 provides the
981 * following restrictions for a DER-encoding, which OpenSSL
982 * (specifically ASN1_GENERALIZEDTIME_check() function) doesn't
983 * support: "The encoding MUST terminate with a "Z" (which means
984 * "Zulu" time). The decimal point element, if present, MUST be the
985 * point option ".". The fractional-seconds elements, if present,
986 * MUST omit all trailing 0's; if the elements correspond to 0, they
987 * MUST be wholly omitted, and the decimal point element also MUST be
991 * Remove trailing zeros. The dot guarantees the exit condition of
992 * this loop even if all the digits are zero.
998 /* p points to either the dot or the last non-zero digit. */
1002 /* Add the trailing Z and the terminating null. */
1006 /* Now call OpenSSL to check and set our genTime value */
1007 if (!asn1_time && !(asn1_time = ASN1_GENERALIZEDTIME_new()))
1009 if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str)) {
1010 ASN1_GENERALIZEDTIME_free(asn1_time);
1016 TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME);