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)
239 sk_X509_pop_free(ctx->certs, X509_free);
242 if (!certs) return 1;
243 if (!(ctx->certs = X509_chain_up_ref(certs)))
245 TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE);
252 int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *policy)
254 ASN1_OBJECT *copy = NULL;
256 /* Create new policy stack if necessary. */
257 if (!ctx->policies && !(ctx->policies = sk_ASN1_OBJECT_new_null()))
259 if (!(copy = OBJ_dup(policy))) goto err;
260 if (!sk_ASN1_OBJECT_push(ctx->policies, copy)) goto err;
264 TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE);
265 ASN1_OBJECT_free(copy);
269 int TS_RESP_CTX_add_md(TS_RESP_CTX *ctx, const EVP_MD *md)
271 /* Create new md stack if necessary. */
272 if (!ctx->mds && !(ctx->mds = sk_EVP_MD_new_null()))
274 /* Add the shared md, no copy needed. */
275 if (!sk_EVP_MD_push(ctx->mds, (EVP_MD *)md)) goto err;
279 TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE);
283 #define TS_RESP_CTX_accuracy_free(ctx) \
284 ASN1_INTEGER_free(ctx->seconds); \
285 ctx->seconds = NULL; \
286 ASN1_INTEGER_free(ctx->millis); \
287 ctx->millis = NULL; \
288 ASN1_INTEGER_free(ctx->micros); \
291 int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx,
292 int secs, int millis, int micros)
295 TS_RESP_CTX_accuracy_free(ctx);
296 if (secs && (!(ctx->seconds = ASN1_INTEGER_new())
297 || !ASN1_INTEGER_set(ctx->seconds, secs)))
299 if (millis && (!(ctx->millis = ASN1_INTEGER_new())
300 || !ASN1_INTEGER_set(ctx->millis, millis)))
302 if (micros && (!(ctx->micros = ASN1_INTEGER_new())
303 || !ASN1_INTEGER_set(ctx->micros, micros)))
308 TS_RESP_CTX_accuracy_free(ctx);
309 TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE);
313 void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags)
318 void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data)
321 ctx->serial_cb_data = data;
324 void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data)
327 ctx->time_cb_data = data;
330 void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx,
331 TS_extension_cb cb, void *data)
333 ctx->extension_cb = cb;
334 ctx->extension_cb_data = data;
337 int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx,
338 int status, const char *text)
340 TS_STATUS_INFO *si = NULL;
341 ASN1_UTF8STRING *utf8_text = NULL;
344 if (!(si = TS_STATUS_INFO_new())) goto err;
345 if (!ASN1_INTEGER_set(si->status, status)) goto err;
348 if (!(utf8_text = ASN1_UTF8STRING_new())
349 || !ASN1_STRING_set(utf8_text, text, strlen(text)))
351 if (!si->text && !(si->text = sk_ASN1_UTF8STRING_new_null()))
353 if (!sk_ASN1_UTF8STRING_push(si->text, utf8_text)) goto err;
354 utf8_text = NULL; /* Ownership is lost. */
356 if (!TS_RESP_set_status_info(ctx->response, si)) goto err;
360 TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE);
361 TS_STATUS_INFO_free(si);
362 ASN1_UTF8STRING_free(utf8_text);
366 int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx,
367 int status, const char *text)
370 TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response);
372 if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED)
374 /* Status has not been set, set it now. */
375 ret = TS_RESP_CTX_set_status_info(ctx, status, text);
380 int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure)
382 TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response);
383 if (!si->failure_info && !(si->failure_info = ASN1_BIT_STRING_new()))
385 if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1))
389 TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE);
393 TS_REQ *TS_RESP_CTX_get_request(TS_RESP_CTX *ctx)
398 TS_TST_INFO *TS_RESP_CTX_get_tst_info(TS_RESP_CTX *ctx)
400 return ctx->tst_info;
403 int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx, unsigned precision)
405 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
407 ctx->clock_precision_digits = precision;
411 /* Main entry method of the response generation. */
412 TS_RESP *TS_RESP_create_response(TS_RESP_CTX *ctx, BIO *req_bio)
418 TS_RESP_CTX_init(ctx);
420 /* Creating the response object. */
421 if (!(ctx->response = TS_RESP_new()))
423 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE);
427 /* Parsing DER request. */
428 if (!(ctx->request = d2i_TS_REQ_bio(req_bio, NULL)))
430 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
431 "Bad request format or "
433 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
437 /* Setting default status info. */
438 if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL))
441 /* Checking the request format. */
442 if (!TS_RESP_check_request(ctx)) goto end;
444 /* Checking acceptable policies. */
445 if (!(policy = TS_RESP_get_policy(ctx))) goto end;
447 /* Creating the TS_TST_INFO object. */
448 if (!(ctx->tst_info = TS_RESP_create_tst_info(ctx, policy)))
451 /* Processing extensions. */
452 if (!TS_RESP_process_extensions(ctx)) goto end;
454 /* Generating the signature. */
455 if (!TS_RESP_sign(ctx)) goto end;
457 /* Everything was successful. */
462 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR);
463 if (ctx->response != NULL)
465 if (TS_RESP_CTX_set_status_info_cond(ctx,
466 TS_STATUS_REJECTION, "Error during response "
469 TS_RESP_free(ctx->response);
470 ctx->response = NULL;
474 response = ctx->response;
475 ctx->response = NULL; /* Ownership will be returned to caller. */
476 TS_RESP_CTX_cleanup(ctx);
480 /* Initializes the variable part of the context. */
481 static void TS_RESP_CTX_init(TS_RESP_CTX *ctx)
484 ctx->response = NULL;
485 ctx->tst_info = NULL;
488 /* Cleans up the variable part of the context. */
489 static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx)
491 TS_REQ_free(ctx->request);
493 TS_RESP_free(ctx->response);
494 ctx->response = NULL;
495 TS_TST_INFO_free(ctx->tst_info);
496 ctx->tst_info = NULL;
499 /* Checks the format and content of the request. */
500 static int TS_RESP_check_request(TS_RESP_CTX *ctx)
502 TS_REQ *request = ctx->request;
503 TS_MSG_IMPRINT *msg_imprint;
506 const ASN1_OCTET_STRING *digest;
510 /* Checking request version. */
511 if (TS_REQ_get_version(request) != 1)
513 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
514 "Bad request version.");
515 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_REQUEST);
519 /* Checking message digest algorithm. */
520 msg_imprint = TS_REQ_get_msg_imprint(request);
521 md_alg = TS_MSG_IMPRINT_get_algo(msg_imprint);
522 md_alg_id = OBJ_obj2nid(md_alg->algorithm);
523 for (i = 0; !md && i < sk_EVP_MD_num(ctx->mds); ++i)
525 EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i);
526 if (md_alg_id == EVP_MD_type(current_md))
531 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
532 "Message digest algorithm is "
534 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
538 /* No message digest takes parameter. */
539 if (md_alg->parameter
540 && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL)
542 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
543 "Superfluous message digest "
545 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
548 /* Checking message digest size. */
549 digest = TS_MSG_IMPRINT_get_msg(msg_imprint);
550 if (digest->length != EVP_MD_size(md))
552 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
553 "Bad message digest.");
554 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
561 /* Returns the TSA policy based on the requested and acceptable policies. */
562 static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx)
564 ASN1_OBJECT *requested = TS_REQ_get_policy_id(ctx->request);
565 ASN1_OBJECT *policy = NULL;
568 if (ctx->default_policy == NULL)
570 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER);
573 /* Return the default policy if none is requested or the default is
575 if (!requested || !OBJ_cmp(requested, ctx->default_policy))
576 policy = ctx->default_policy;
578 /* Check if the policy is acceptable. */
579 for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i)
581 ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i);
582 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 "
591 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY);
596 /* Creates the TS_TST_INFO object based on the settings of the context. */
597 static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx,
601 TS_TST_INFO *tst_info = NULL;
602 ASN1_INTEGER *serial = NULL;
603 ASN1_GENERALIZEDTIME *asn1_time = NULL;
605 TS_ACCURACY *accuracy = NULL;
606 const ASN1_INTEGER *nonce;
607 GENERAL_NAME *tsa_name = NULL;
609 if (!(tst_info = TS_TST_INFO_new())) goto end;
610 if (!TS_TST_INFO_set_version(tst_info, 1)) goto end;
611 if (!TS_TST_INFO_set_policy_id(tst_info, policy)) goto end;
612 if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint))
614 if (!(serial = (*ctx->serial_cb)(ctx, ctx->serial_cb_data))
615 || !TS_TST_INFO_set_serial(tst_info, serial))
617 if (!(*ctx->time_cb)(ctx, ctx->time_cb_data, &sec, &usec)
618 || !(asn1_time = TS_RESP_set_genTime_with_precision(NULL,
620 ctx->clock_precision_digits))
621 || !TS_TST_INFO_set_time(tst_info, asn1_time))
624 /* Setting accuracy if needed. */
625 if ((ctx->seconds || ctx->millis || ctx->micros)
626 && !(accuracy = TS_ACCURACY_new()))
629 if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds))
631 if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis))
633 if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros))
635 if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy))
638 /* Setting ordering. */
639 if ((ctx->flags & TS_ORDERING)
640 && !TS_TST_INFO_set_ordering(tst_info, 1))
643 /* Setting nonce if needed. */
644 if ((nonce = TS_REQ_get_nonce(ctx->request)) != NULL
645 && !TS_TST_INFO_set_nonce(tst_info, nonce))
648 /* Setting TSA name to subject of signer certificate. */
649 if (ctx->flags & TS_TSA_NAME)
651 if (!(tsa_name = GENERAL_NAME_new())) goto end;
652 tsa_name->type = GEN_DIRNAME;
654 X509_NAME_dup(ctx->signer_cert->cert_info->subject);
655 if (!tsa_name->d.dirn) goto end;
656 if (!TS_TST_INFO_set_tsa(tst_info, tsa_name)) goto end;
663 TS_TST_INFO_free(tst_info);
665 TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR);
666 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
667 "Error during TSTInfo "
670 GENERAL_NAME_free(tsa_name);
671 TS_ACCURACY_free(accuracy);
672 ASN1_GENERALIZEDTIME_free(asn1_time);
673 ASN1_INTEGER_free(serial);
678 /* Processing the extensions of the request. */
679 static int TS_RESP_process_extensions(TS_RESP_CTX *ctx)
681 STACK_OF(X509_EXTENSION) *exts = TS_REQ_get_exts(ctx->request);
685 for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i)
687 X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
688 /* XXXXX The last argument was previously
689 (void *)ctx->extension_cb, but ISO C doesn't permit
690 converting a function pointer to void *. For lack of
691 better information, I'm placing a NULL there instead.
692 The callback can pick its own address out from the ctx
695 ok = (*ctx->extension_cb)(ctx, ext, NULL);
701 /* Functions for signing the TS_TST_INFO structure of the context. */
702 static int TS_RESP_sign(TS_RESP_CTX *ctx)
706 PKCS7_SIGNER_INFO *si;
707 STACK_OF(X509) *certs; /* Certificates to include in sc. */
708 ESS_SIGNING_CERT *sc = NULL;
713 /* Check if signcert and pkey match. */
714 if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) {
715 TSerr(TS_F_TS_RESP_SIGN,
716 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)) goto err;
727 /* Force SignedData version to be 3 instead of the default 1. */
728 if (!ASN1_INTEGER_set(p7->d.sign->version, 3)) goto err;
730 /* Add signer certificate and optional certificate chain. */
731 if (TS_REQ_get_cert_req(ctx->request))
733 PKCS7_add_certificate(p7, ctx->signer_cert);
736 for(i = 0; i < sk_X509_num(ctx->certs); ++i)
738 X509 *cert = sk_X509_value(ctx->certs, i);
739 PKCS7_add_certificate(p7, cert);
744 /* Add a new signer info. */
745 if (!(si = PKCS7_add_signature(p7, ctx->signer_cert,
746 ctx->signer_key, EVP_sha1())))
748 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR);
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,
757 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR);
761 /* Create the ESS SigningCertificate attribute which contains
762 the signer certificate id and optionally the certificate chain. */
763 certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL;
764 if (!(sc = ESS_SIGNING_CERT_new_init(ctx->signer_cert, certs)))
767 /* Add SigningCertificate signed attribute to the signer info. */
768 if (!ESS_add_signing_cert(si, sc))
770 TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR);
774 /* Add a new empty NID_id_smime_ct_TSTInfo encapsulated content. */
775 if (!TS_TST_INFO_content_new(p7)) goto err;
777 /* Add the DER encoded tst_info to the PKCS7 structure. */
778 if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
779 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
783 /* Convert tst_info to DER. */
784 if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info))
786 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
790 /* Create the signature and add it to the signer info. */
791 if (!PKCS7_dataFinal(p7, p7bio))
793 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
797 /* Set new PKCS7 and TST_INFO objects. */
798 TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info);
799 p7 = NULL; /* Ownership is lost. */
800 ctx->tst_info = NULL; /* Ownership is lost. */
805 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
806 "Error during signature "
809 ESS_SIGNING_CERT_free(sc);
814 static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert,
815 STACK_OF(X509) *certs)
818 ESS_SIGNING_CERT *sc = NULL;
821 /* Creating the ESS_CERT_ID stack. */
822 if (!(sc = ESS_SIGNING_CERT_new())) goto err;
823 if (!sc->cert_ids && !(sc->cert_ids = sk_ESS_CERT_ID_new_null()))
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))
830 /* Adding the certificate chain ids. */
831 for (i = 0; i < sk_X509_num(certs); ++i)
833 X509 *cert = sk_X509_value(certs, i);
834 if (!(cid = ESS_CERT_ID_new_init(cert, 1))
835 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
841 ESS_SIGNING_CERT_free(sc);
842 TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE);
846 static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed)
848 ESS_CERT_ID *cid = NULL;
849 GENERAL_NAME *name = NULL;
851 /* Recompute SHA1 hash of certificate if necessary (side effect). */
852 X509_check_purpose(cert, -1, 0);
854 if (!(cid = ESS_CERT_ID_new())) goto err;
855 if (!ASN1_OCTET_STRING_set(cid->hash, cert->sha1_hash,
856 sizeof(cert->sha1_hash)))
859 /* Setting the issuer/serial if requested. */
862 /* Creating issuer/serial structure. */
863 if (!cid->issuer_serial
864 && !(cid->issuer_serial = ESS_ISSUER_SERIAL_new()))
866 /* Creating general name from the certificate issuer. */
867 if (!(name = GENERAL_NAME_new())) goto err;
868 name->type = GEN_DIRNAME;
869 if (!(name->d.dirn = X509_NAME_dup(cert->cert_info->issuer)))
871 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
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)))
883 GENERAL_NAME_free(name);
884 ESS_CERT_ID_free(cid);
885 TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE);
889 static int TS_TST_INFO_content_new(PKCS7 *p7)
892 ASN1_OCTET_STRING *octet_string = NULL;
894 /* Create new encapsulated NID_id_smime_ct_TSTInfo content. */
895 if (!(ret = PKCS7_new())) goto err;
896 if (!(ret->d.other = ASN1_TYPE_new())) goto err;
897 ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
898 if (!(octet_string = ASN1_OCTET_STRING_new())) goto err;
899 ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string);
902 /* Add encapsulated content to signed PKCS7 structure. */
903 if (!PKCS7_set_content(p7, ret)) goto err;
907 ASN1_OCTET_STRING_free(octet_string);
912 static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc)
914 ASN1_STRING *seq = NULL;
915 unsigned char *p, *pp = NULL;
918 len = i2d_ESS_SIGNING_CERT(sc, NULL);
919 if (!(pp = (unsigned char *) OPENSSL_malloc(len)))
921 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
925 i2d_ESS_SIGNING_CERT(sc, &p);
926 if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len))
928 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
931 OPENSSL_free(pp); pp = NULL;
932 return PKCS7_add_signed_attribute(si,
933 NID_id_smime_aa_signingCertificate,
934 V_ASN1_SEQUENCE, seq);
936 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)
957 if (!(tm = gmtime(&time_sec)))
961 * Put "genTime_str" in GeneralizedTime format. We work around the
962 * restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST
963 * NOT include fractional seconds") and OpenSSL related functions to
964 * meet the rfc3161 requirement: "GeneralizedTime syntax can include
965 * fraction-of-second details".
967 p += BIO_snprintf(p, p_end - p,
968 "%04d%02d%02d%02d%02d%02d",
969 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
970 tm->tm_hour, tm->tm_min, tm->tm_sec);
973 /* Add fraction of seconds (leave space for dot and null). */
974 BIO_snprintf(p, 2 + precision, ".%ld", usec);
975 /* We cannot use the snprintf return value,
976 because it might have been truncated. */
979 /* To make things a bit harder, X.690 | ISO/IEC 8825-1 provides
980 the following restrictions for a DER-encoding, which OpenSSL
981 (specifically ASN1_GENERALIZEDTIME_check() function) doesn't
983 "The encoding MUST terminate with a "Z" (which means "Zulu"
984 time). The decimal point element, if present, MUST be the
985 point option ".". The fractional-seconds elements,
986 if present, MUST omit all trailing 0's;
987 if the elements correspond to 0, they MUST be wholly
988 omitted, and the decimal point element also MUST be
990 /* Remove trailing zeros. The dot guarantees the exit
991 condition of this loop even if all the digits are zero. */
994 /* p points to either the dot or the last non-zero digit. */
997 /* Add the trailing Z and the terminating null. */
1001 /* Now call OpenSSL to check and set our genTime value */
1002 if (!asn1_time && !(asn1_time = M_ASN1_GENERALIZEDTIME_new()))
1004 if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str))
1006 ASN1_GENERALIZEDTIME_free(asn1_time);
1012 TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME);