1 /* crypto/ts/ts_resp_sign.c */
2 /* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
61 #if defined(OPENSSL_SYS_UNIX)
65 #include <openssl/objects.h>
66 #include <openssl/ts.h>
67 #include <openssl/pkcs7.h>
69 /* Private function declarations. */
71 static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *, void *);
72 static int def_time_cb(struct TS_resp_ctx *, void *, long *sec, long *usec);
73 static int def_extension_cb(struct TS_resp_ctx *, X509_EXTENSION *, void *);
75 static void TS_RESP_CTX_init(TS_RESP_CTX *ctx);
76 static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx);
77 static int TS_RESP_check_request(TS_RESP_CTX *ctx);
78 static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx);
79 static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx,
81 static int TS_RESP_process_extensions(TS_RESP_CTX *ctx);
82 static int TS_RESP_sign(TS_RESP_CTX *ctx);
84 static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert,
85 STACK_OF(X509) *certs);
86 static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed);
87 static int TS_TST_INFO_content_new(PKCS7 *p7);
88 static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc);
90 static ASN1_GENERALIZEDTIME *TS_RESP_set_genTime_with_precision(
91 ASN1_GENERALIZEDTIME *, long, long, unsigned);
93 /* Default callbacks for response generation. */
95 static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *ctx, void *data)
97 ASN1_INTEGER *serial = ASN1_INTEGER_new();
98 if (!serial) goto err;
99 if (!ASN1_INTEGER_set(serial, 1)) goto err;
102 TSerr(TS_F_DEF_SERIAL_CB, ERR_R_MALLOC_FAILURE);
103 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
104 "Error during serial number generation.");
108 #if defined(OPENSSL_SYS_UNIX)
110 /* Use the gettimeofday function call. */
111 static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
112 long *sec, long *usec)
115 if (gettimeofday(&tv, NULL) != 0)
117 TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
118 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
119 "Time is not available.");
120 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
123 /* Return time to caller. */
132 /* Use the time function call that provides only seconds precision. */
133 static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
134 long *sec, long *usec)
137 if (time(&t) == (time_t) -1)
139 TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
140 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
141 "Time is not available.");
142 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
145 /* Return time to caller, only second precision. */
154 static int def_extension_cb(struct TS_resp_ctx *ctx, X509_EXTENSION *ext,
157 /* No extensions are processed here. */
158 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
159 "Unsupported extension.");
160 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_EXTENSION);
164 /* TS_RESP_CTX management functions. */
166 TS_RESP_CTX *TS_RESP_CTX_new()
170 if (!(ctx = (TS_RESP_CTX *) OPENSSL_malloc(sizeof(TS_RESP_CTX))))
172 TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE);
175 memset(ctx, 0, sizeof(TS_RESP_CTX));
177 /* Setting default callbacks. */
178 ctx->serial_cb = def_serial_cb;
179 ctx->time_cb = def_time_cb;
180 ctx->extension_cb = def_extension_cb;
185 void TS_RESP_CTX_free(TS_RESP_CTX *ctx)
189 X509_free(ctx->signer_cert);
190 EVP_PKEY_free(ctx->signer_key);
191 sk_X509_pop_free(ctx->certs, X509_free);
192 sk_ASN1_OBJECT_pop_free(ctx->policies, ASN1_OBJECT_free);
193 ASN1_OBJECT_free(ctx->default_policy);
194 sk_EVP_MD_free(ctx->mds); /* No EVP_MD_free method exists. */
195 ASN1_INTEGER_free(ctx->seconds);
196 ASN1_INTEGER_free(ctx->millis);
197 ASN1_INTEGER_free(ctx->micros);
201 int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX *ctx, X509 *signer)
203 if (X509_check_purpose(signer, X509_PURPOSE_TIMESTAMP_SIGN, 0) != 1)
205 TSerr(TS_F_TS_RESP_CTX_SET_SIGNER_CERT,
206 TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE);
209 if (ctx->signer_cert) X509_free(ctx->signer_cert);
210 ctx->signer_cert = signer;
211 CRYPTO_add(&ctx->signer_cert->references, +1, CRYPTO_LOCK_X509);
215 int TS_RESP_CTX_set_signer_key(TS_RESP_CTX *ctx, EVP_PKEY *key)
217 if (ctx->signer_key) EVP_PKEY_free(ctx->signer_key);
218 ctx->signer_key = key;
219 CRYPTO_add(&ctx->signer_key->references, +1, CRYPTO_LOCK_EVP_PKEY);
224 int TS_RESP_CTX_set_def_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *def_policy)
226 if (ctx->default_policy) ASN1_OBJECT_free(ctx->default_policy);
227 if (!(ctx->default_policy = OBJ_dup(def_policy))) goto err;
230 TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE);
234 int TS_RESP_CTX_set_certs(TS_RESP_CTX *ctx, STACK_OF(X509) *certs)
240 sk_X509_pop_free(ctx->certs, X509_free);
243 if (!certs) return 1;
244 if (!(ctx->certs = sk_X509_dup(certs)))
246 TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE);
249 for (i = 0; i < sk_X509_num(ctx->certs); ++i)
251 X509 *cert = sk_X509_value(ctx->certs, i);
252 CRYPTO_add(&cert->references, +1, CRYPTO_LOCK_X509);
258 int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *policy)
260 ASN1_OBJECT *copy = NULL;
262 /* Create new policy stack if necessary. */
263 if (!ctx->policies && !(ctx->policies = sk_ASN1_OBJECT_new_null()))
265 if (!(copy = OBJ_dup(policy))) goto err;
266 if (!sk_ASN1_OBJECT_push(ctx->policies, copy)) goto err;
270 TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE);
271 ASN1_OBJECT_free(copy);
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()))
280 /* Add the shared md, no copy needed. */
281 if (!sk_EVP_MD_push(ctx->mds, (EVP_MD *)md)) goto err;
285 TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE);
289 #define TS_RESP_CTX_accuracy_free(ctx) \
290 ASN1_INTEGER_free(ctx->seconds); \
291 ctx->seconds = NULL; \
292 ASN1_INTEGER_free(ctx->millis); \
293 ctx->millis = NULL; \
294 ASN1_INTEGER_free(ctx->micros); \
297 int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx,
298 int secs, int millis, int micros)
301 TS_RESP_CTX_accuracy_free(ctx);
302 if (secs && (!(ctx->seconds = ASN1_INTEGER_new())
303 || !ASN1_INTEGER_set(ctx->seconds, secs)))
305 if (millis && (!(ctx->millis = ASN1_INTEGER_new())
306 || !ASN1_INTEGER_set(ctx->millis, millis)))
308 if (micros && (!(ctx->micros = ASN1_INTEGER_new())
309 || !ASN1_INTEGER_set(ctx->micros, micros)))
314 TS_RESP_CTX_accuracy_free(ctx);
315 TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE);
319 void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags)
324 void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data)
327 ctx->serial_cb_data = data;
330 void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data)
333 ctx->time_cb_data = data;
336 void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx,
337 TS_extension_cb cb, void *data)
339 ctx->extension_cb = cb;
340 ctx->extension_cb_data = data;
343 int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx,
344 int status, const char *text)
346 TS_STATUS_INFO *si = NULL;
347 ASN1_UTF8STRING *utf8_text = NULL;
350 if (!(si = TS_STATUS_INFO_new())) goto err;
351 if (!ASN1_INTEGER_set(si->status, status)) goto err;
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)) goto err;
360 utf8_text = NULL; /* Ownership is lost. */
362 if (!TS_RESP_set_status_info(ctx->response, si)) goto err;
366 TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE);
367 TS_STATUS_INFO_free(si);
368 ASN1_UTF8STRING_free(utf8_text);
372 int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx,
373 int status, const char *text)
376 TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response);
378 if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED)
380 /* Status has not been set, set it now. */
381 ret = TS_RESP_CTX_set_status_info(ctx, status, text);
386 int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure)
388 TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response);
389 if (!si->failure_info && !(si->failure_info = ASN1_BIT_STRING_new()))
391 if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1))
395 TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE);
399 TS_REQ *TS_RESP_CTX_get_request(TS_RESP_CTX *ctx)
404 TS_TST_INFO *TS_RESP_CTX_get_tst_info(TS_RESP_CTX *ctx)
406 return ctx->tst_info;
409 int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx, unsigned precision)
411 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
413 ctx->clock_precision_digits = precision;
417 /* Main entry method of the response generation. */
418 TS_RESP *TS_RESP_create_response(TS_RESP_CTX *ctx, BIO *req_bio)
424 TS_RESP_CTX_init(ctx);
426 /* Creating the response object. */
427 if (!(ctx->response = TS_RESP_new()))
429 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE);
433 /* Parsing DER request. */
434 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 "
439 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
443 /* Setting default status info. */
444 if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL))
447 /* Checking the request format. */
448 if (!TS_RESP_check_request(ctx)) goto end;
450 /* Checking acceptable policies. */
451 if (!(policy = TS_RESP_get_policy(ctx))) goto end;
453 /* Creating the TS_TST_INFO object. */
454 if (!(ctx->tst_info = TS_RESP_create_tst_info(ctx, policy)))
457 /* Processing extensions. */
458 if (!TS_RESP_process_extensions(ctx)) goto end;
460 /* Generating the signature. */
461 if (!TS_RESP_sign(ctx)) goto end;
463 /* Everything was successful. */
468 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR);
469 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
470 "Error during response "
472 /* Check if the status info was set. */
475 TS_RESP_get_status_info(ctx->response)->status)
476 == TS_STATUS_GRANTED)
478 /* Status info wasn't set, don't return a response. */
479 TS_RESP_free(ctx->response);
480 ctx->response = NULL;
483 response = ctx->response;
484 ctx->response = NULL; /* Ownership will be returned to caller. */
485 TS_RESP_CTX_cleanup(ctx);
489 /* Initializes the variable part of the context. */
490 static void TS_RESP_CTX_init(TS_RESP_CTX *ctx)
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);
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;
515 ASN1_OCTET_STRING *digest;
519 /* Checking request version. */
520 if (TS_REQ_get_version(request) != 1)
522 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
523 "Bad request version.");
524 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_REQUEST);
528 /* Checking message digest algorithm. */
529 msg_imprint = TS_REQ_get_msg_imprint(request);
530 md_alg = TS_MSG_IMPRINT_get_algo(msg_imprint);
531 md_alg_id = OBJ_obj2nid(md_alg->algorithm);
532 for (i = 0; !md && i < sk_EVP_MD_num(ctx->mds); ++i)
534 EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i);
535 if (md_alg_id == EVP_MD_type(current_md))
540 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
541 "Message digest algorithm is "
543 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
547 /* No message digest takes parameter. */
548 if (md_alg->parameter
549 && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL)
551 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
552 "Superfluous message digest "
554 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
557 /* Checking message digest size. */
558 digest = TS_MSG_IMPRINT_get_msg(msg_imprint);
559 if (digest->length != EVP_MD_size(md))
561 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
562 "Bad message digest.");
563 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
570 /* Returns the TSA policy based on the rqeuested and acceptable policies. */
571 static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx)
573 ASN1_OBJECT *requested = TS_REQ_get_policy_id(ctx->request);
574 ASN1_OBJECT *policy = NULL;
577 /* Return the default policy if none is requested or the default is
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)
585 ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i);
586 if (!OBJ_cmp(requested, current))
591 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY);
592 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
593 "Requested policy is not "
595 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY);
600 /* Creates the TS_TST_INFO object based on the settings of the context. */
601 static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx,
605 TS_TST_INFO *tst_info = NULL;
606 ASN1_INTEGER *serial = NULL;
607 ASN1_GENERALIZEDTIME *asn1_time = NULL;
609 TS_ACCURACY *accuracy = NULL;
611 GENERAL_NAME *tsa_name = NULL;
613 if (!(tst_info = TS_TST_INFO_new())) goto end;
614 if (!TS_TST_INFO_set_version(tst_info, 1)) goto end;
615 if (!TS_TST_INFO_set_policy_id(tst_info, policy)) goto end;
616 if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint))
618 if (!(serial = (*ctx->serial_cb)(ctx, ctx->serial_cb_data))
619 || !TS_TST_INFO_set_serial(tst_info, serial))
621 if (!(*ctx->time_cb)(ctx, ctx->time_cb_data, &sec, &usec)
622 || !(asn1_time = TS_RESP_set_genTime_with_precision(NULL,
624 ctx->clock_precision_digits))
625 || !TS_TST_INFO_set_time(tst_info, asn1_time))
628 /* Setting accuracy if needed. */
629 if ((ctx->seconds || ctx->millis || ctx->micros)
630 && !(accuracy = TS_ACCURACY_new()))
633 if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds))
635 if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis))
637 if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros))
639 if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy))
642 /* Setting ordering. */
643 if ((ctx->flags & TS_ORDERING)
644 && !TS_TST_INFO_set_ordering(tst_info, 1))
647 /* Setting nonce if needed. */
648 if ((nonce = TS_REQ_get_nonce(ctx->request)) != NULL
649 && !TS_TST_INFO_set_nonce(tst_info, nonce))
652 /* Setting TSA name to subject of signer certificate. */
653 if (ctx->flags & TS_TSA_NAME)
655 if (!(tsa_name = GENERAL_NAME_new())) goto end;
656 tsa_name->type = GEN_DIRNAME;
658 X509_NAME_dup(ctx->signer_cert->cert_info->subject);
659 if (!tsa_name->d.dirn) goto end;
660 if (!TS_TST_INFO_set_tsa(tst_info, tsa_name)) goto end;
667 TS_TST_INFO_free(tst_info);
669 TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR);
670 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
671 "Error during TSTInfo "
674 GENERAL_NAME_free(tsa_name);
675 TS_ACCURACY_free(accuracy);
676 ASN1_GENERALIZEDTIME_free(asn1_time);
677 ASN1_INTEGER_free(serial);
682 /* Processing the extensions of the request. */
683 static int TS_RESP_process_extensions(TS_RESP_CTX *ctx)
685 STACK_OF(X509_EXTENSION) *exts = TS_REQ_get_exts(ctx->request);
689 for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i)
691 X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
692 /* XXXXX The last argument was previously
693 (void *)ctx->extension_cb, but ISO C doesn't permit
694 converting a function pointer to void *. For lack of
695 better information, I'm placing a NULL there instead.
696 The callback can pick its own address out from the ctx
699 ok = (*ctx->extension_cb)(ctx, ext, NULL);
705 /* Functions for signing the TS_TST_INFO structure of the context. */
706 static int TS_RESP_sign(TS_RESP_CTX *ctx)
710 PKCS7_SIGNER_INFO *si;
711 STACK_OF(X509) *certs; /* Certificates to include in sc. */
712 ESS_SIGNING_CERT *sc = NULL;
717 /* Check if signcert and pkey match. */
718 if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) {
719 TSerr(TS_F_TS_RESP_SIGN,
720 TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
724 /* Create a new PKCS7 signed object. */
725 if (!(p7 = PKCS7_new())) {
726 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
729 if (!PKCS7_set_type(p7, NID_pkcs7_signed)) goto err;
731 /* Force SignedData version to be 3 instead of the default 1. */
732 if (!ASN1_INTEGER_set(p7->d.sign->version, 3)) goto err;
734 /* Add signer certificate and optional certificate chain. */
735 if (TS_REQ_get_cert_req(ctx->request))
737 PKCS7_add_certificate(p7, ctx->signer_cert);
740 for(i = 0; i < sk_X509_num(ctx->certs); ++i)
742 X509 *cert = sk_X509_value(ctx->certs, i);
743 PKCS7_add_certificate(p7, cert);
748 /* Add a new signer info. */
749 if (!(si = PKCS7_add_signature(p7, ctx->signer_cert,
750 ctx->signer_key, EVP_sha1())))
752 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR);
756 /* Add content type signed attribute to the signer info. */
757 oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
758 if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
761 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR);
765 /* Create the ESS SigningCertificate attribute which contains
766 the signer certificate id and optionally the certificate chain. */
767 certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL;
768 if (!(sc = ESS_SIGNING_CERT_new_init(ctx->signer_cert, certs)))
771 /* Add SigningCertificate signed attribute to the signer info. */
772 if (!ESS_add_signing_cert(si, sc))
774 TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR);
778 /* Add a new empty NID_id_smime_ct_TSTInfo encapsulated content. */
779 if (!TS_TST_INFO_content_new(p7)) goto err;
781 /* Add the DER encoded tst_info to the PKCS7 structure. */
782 if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
783 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
787 /* Convert tst_info to DER. */
788 if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info))
790 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
794 /* Create the signature and add it to the signer info. */
795 if (!PKCS7_dataFinal(p7, p7bio))
797 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
801 /* Set new PKCS7 and TST_INFO objects. */
802 TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info);
803 p7 = NULL; /* Ownership is lost. */
804 ctx->tst_info = NULL; /* Ownership is lost. */
809 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
810 "Error during signature "
813 ESS_SIGNING_CERT_free(sc);
818 static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert,
819 STACK_OF(X509) *certs)
822 ESS_SIGNING_CERT *sc = NULL;
825 /* Creating the ESS_CERT_ID stack. */
826 if (!(sc = ESS_SIGNING_CERT_new())) goto err;
827 if (!sc->cert_ids && !(sc->cert_ids = sk_ESS_CERT_ID_new_null()))
830 /* Adding the signing certificate id. */
831 if (!(cid = ESS_CERT_ID_new_init(signcert, 0))
832 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
834 /* Adding the certificate chain ids. */
835 for (i = 0; i < sk_X509_num(certs); ++i)
837 X509 *cert = sk_X509_value(certs, i);
838 if (!(cid = ESS_CERT_ID_new_init(cert, 1))
839 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
845 ESS_SIGNING_CERT_free(sc);
846 TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE);
850 static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed)
852 ESS_CERT_ID *cid = NULL;
853 GENERAL_NAME *name = NULL;
855 /* Recompute SHA1 hash of certificate if necessary (side effect). */
856 X509_check_purpose(cert, -1, 0);
858 if (!(cid = ESS_CERT_ID_new())) goto err;
859 if (!ASN1_OCTET_STRING_set(cid->hash, cert->sha1_hash,
860 sizeof(cert->sha1_hash)))
863 /* Setting the issuer/serial if requested. */
866 /* Creating issuer/serial structure. */
867 if (!cid->issuer_serial
868 && !(cid->issuer_serial = ESS_ISSUER_SERIAL_new()))
870 /* Creating general name from the certificate issuer. */
871 if (!(name = GENERAL_NAME_new())) goto err;
872 name->type = GEN_DIRNAME;
873 if (!(name->d.dirn = X509_NAME_dup(cert->cert_info->issuer)))
875 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
877 name = NULL; /* Ownership is lost. */
878 /* Setting the serial number. */
879 ASN1_INTEGER_free(cid->issuer_serial->serial);
880 if (!(cid->issuer_serial->serial =
881 ASN1_INTEGER_dup(cert->cert_info->serialNumber)))
887 GENERAL_NAME_free(name);
888 ESS_CERT_ID_free(cid);
889 TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE);
893 static int TS_TST_INFO_content_new(PKCS7 *p7)
896 ASN1_OCTET_STRING *octet_string = NULL;
898 /* Create new encapsulated NID_id_smime_ct_TSTInfo content. */
899 if (!(ret = PKCS7_new())) goto err;
900 if (!(ret->d.other = ASN1_TYPE_new())) goto err;
901 ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
902 if (!(octet_string = ASN1_OCTET_STRING_new())) goto err;
903 ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string);
906 /* Add encapsulated content to signed PKCS7 structure. */
907 if (!PKCS7_set_content(p7, ret)) goto err;
911 ASN1_OCTET_STRING_free(octet_string);
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;
922 len = i2d_ESS_SIGNING_CERT(sc, NULL);
923 if (!(pp = (unsigned char *) OPENSSL_malloc(len)))
925 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
929 i2d_ESS_SIGNING_CERT(sc, &p);
930 if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len))
932 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
935 OPENSSL_free(pp); pp = NULL;
936 return PKCS7_add_signed_attribute(si,
937 NID_id_smime_aa_signingCertificate,
938 V_ASN1_SEQUENCE, seq);
940 ASN1_STRING_free(seq);
947 static ASN1_GENERALIZEDTIME *
948 TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *asn1_time,
949 long sec, long usec, unsigned precision)
951 time_t time_sec = (time_t) sec;
952 struct tm *tm = NULL;
953 char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS];
954 char *p = genTime_str;
955 char *p_end = genTime_str + sizeof(genTime_str);
957 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
961 if (!(tm = gmtime(&time_sec)))
965 * Put "genTime_str" in GeneralizedTime format. We work around the
966 * restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST
967 * NOT include fractional seconds") and OpenSSL related functions to
968 * meet the rfc3161 requirement: "GeneralizedTime syntax can include
969 * fraction-of-second details".
971 p += BIO_snprintf(p, p_end - p,
972 "%04d%02d%02d%02d%02d%02d",
973 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
974 tm->tm_hour, tm->tm_min, tm->tm_sec);
977 /* Add fraction of seconds (leave space for dot and null). */
978 BIO_snprintf(p, 2 + precision, ".%ld", usec);
979 /* We cannot use the snprintf return value,
980 because it might have been truncated. */
983 /* To make things a bit harder, X.690 | ISO/IEC 8825-1 provides
984 the following restrictions for a DER-encoding, which OpenSSL
985 (specifically ASN1_GENERALIZEDTIME_check() function) doesn't
987 "The encoding MUST terminate with a "Z" (which means "Zulu"
988 time). The decimal point element, if present, MUST be the
989 point option ".". The fractional-seconds elements,
990 if present, MUST omit all trailing 0's;
991 if the elements correspond to 0, they MUST be wholly
992 omitted, and the decimal point element also MUST be
994 /* Remove trailing zeros. The dot guarantees the exit
995 condition of this loop even if all the digits are zero. */
998 /* p points to either the dot or the last non-zero digit. */
1001 /* Add the trailing Z and the terminating null. */
1005 /* Now call OpenSSL to check and set our genTime value */
1006 if (!asn1_time && !(asn1_time = M_ASN1_GENERALIZEDTIME_new()))
1008 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);