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
if (ctx->response != NULL)
471
if (TS_RESP_CTX_set_status_info_cond(ctx,
472
TS_STATUS_REJECTION, "Error during response "
475
TS_RESP_free(ctx->response);
476
ctx->response = NULL;
480
response = ctx->response;
481
ctx->response = NULL; /* Ownership will be returned to caller. */
482
TS_RESP_CTX_cleanup(ctx);
486
/* Initializes the variable part of the context. */
487
static void TS_RESP_CTX_init(TS_RESP_CTX *ctx)
490
ctx->response = NULL;
491
ctx->tst_info = NULL;
494
/* Cleans up the variable part of the context. */
495
static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx)
497
TS_REQ_free(ctx->request);
499
TS_RESP_free(ctx->response);
500
ctx->response = NULL;
501
TS_TST_INFO_free(ctx->tst_info);
502
ctx->tst_info = NULL;
505
/* Checks the format and content of the request. */
506
static int TS_RESP_check_request(TS_RESP_CTX *ctx)
508
TS_REQ *request = ctx->request;
509
TS_MSG_IMPRINT *msg_imprint;
512
const ASN1_OCTET_STRING *digest;
516
/* Checking request version. */
517
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)
531
EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i);
532
if (md_alg_id == EVP_MD_type(current_md))
537
TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
538
"Message digest algorithm is "
540
TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
544
/* No message digest takes parameter. */
545
if (md_alg->parameter
546
&& ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL)
548
TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
549
"Superfluous message digest "
551
TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
554
/* Checking message digest size. */
555
digest = TS_MSG_IMPRINT_get_msg(msg_imprint);
556
if (digest->length != EVP_MD_size(md))
558
TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
559
"Bad message digest.");
560
TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
567
/* Returns the TSA policy based on the requested and acceptable policies. */
568
static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx)
570
ASN1_OBJECT *requested = TS_REQ_get_policy_id(ctx->request);
571
ASN1_OBJECT *policy = NULL;
574
if (ctx->default_policy == NULL)
576
TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER);
579
/* Return the default policy if none is requested or the default is
581
if (!requested || !OBJ_cmp(requested, ctx->default_policy))
582
policy = ctx->default_policy;
584
/* Check if the policy is acceptable. */
585
for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i)
587
ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i);
588
if (!OBJ_cmp(requested, current))
593
TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY);
594
TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
595
"Requested policy is not "
597
TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY);
602
/* Creates the TS_TST_INFO object based on the settings of the context. */
603
static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx,
607
TS_TST_INFO *tst_info = NULL;
608
ASN1_INTEGER *serial = NULL;
609
ASN1_GENERALIZEDTIME *asn1_time = NULL;
611
TS_ACCURACY *accuracy = NULL;
612
const ASN1_INTEGER *nonce;
613
GENERAL_NAME *tsa_name = NULL;
615
if (!(tst_info = TS_TST_INFO_new())) goto end;
616
if (!TS_TST_INFO_set_version(tst_info, 1)) goto end;
617
if (!TS_TST_INFO_set_policy_id(tst_info, policy)) goto end;
618
if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint))
620
if (!(serial = (*ctx->serial_cb)(ctx, ctx->serial_cb_data))
621
|| !TS_TST_INFO_set_serial(tst_info, serial))
623
if (!(*ctx->time_cb)(ctx, ctx->time_cb_data, &sec, &usec)
624
|| !(asn1_time = TS_RESP_set_genTime_with_precision(NULL,
626
ctx->clock_precision_digits))
627
|| !TS_TST_INFO_set_time(tst_info, asn1_time))
630
/* Setting accuracy if needed. */
631
if ((ctx->seconds || ctx->millis || ctx->micros)
632
&& !(accuracy = TS_ACCURACY_new()))
635
if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds))
637
if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis))
639
if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros))
641
if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy))
644
/* Setting ordering. */
645
if ((ctx->flags & TS_ORDERING)
646
&& !TS_TST_INFO_set_ordering(tst_info, 1))
649
/* Setting nonce if needed. */
650
if ((nonce = TS_REQ_get_nonce(ctx->request)) != NULL
651
&& !TS_TST_INFO_set_nonce(tst_info, nonce))
654
/* Setting TSA name to subject of signer certificate. */
655
if (ctx->flags & TS_TSA_NAME)
657
if (!(tsa_name = GENERAL_NAME_new())) goto end;
658
tsa_name->type = GEN_DIRNAME;
660
X509_NAME_dup(ctx->signer_cert->cert_info->subject);
661
if (!tsa_name->d.dirn) goto end;
662
if (!TS_TST_INFO_set_tsa(tst_info, tsa_name)) goto end;
669
TS_TST_INFO_free(tst_info);
671
TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR);
672
TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
673
"Error during TSTInfo "
676
GENERAL_NAME_free(tsa_name);
677
TS_ACCURACY_free(accuracy);
678
ASN1_GENERALIZEDTIME_free(asn1_time);
679
ASN1_INTEGER_free(serial);
684
/* Processing the extensions of the request. */
685
static int TS_RESP_process_extensions(TS_RESP_CTX *ctx)
687
STACK_OF(X509_EXTENSION) *exts = TS_REQ_get_exts(ctx->request);
691
for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i)
693
X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
694
/* XXXXX The last argument was previously
695
(void *)ctx->extension_cb, but ISO C doesn't permit
696
converting a function pointer to void *. For lack of
697
better information, I'm placing a NULL there instead.
698
The callback can pick its own address out from the ctx
701
ok = (*ctx->extension_cb)(ctx, ext, NULL);
707
/* Functions for signing the TS_TST_INFO structure of the context. */
708
static int TS_RESP_sign(TS_RESP_CTX *ctx)
712
PKCS7_SIGNER_INFO *si;
713
STACK_OF(X509) *certs; /* Certificates to include in sc. */
714
ESS_SIGNING_CERT *sc = NULL;
719
/* Check if signcert and pkey match. */
720
if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) {
721
TSerr(TS_F_TS_RESP_SIGN,
722
TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
726
/* Create a new PKCS7 signed object. */
727
if (!(p7 = PKCS7_new())) {
728
TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
731
if (!PKCS7_set_type(p7, NID_pkcs7_signed)) goto err;
733
/* Force SignedData version to be 3 instead of the default 1. */
734
if (!ASN1_INTEGER_set(p7->d.sign->version, 3)) goto err;
736
/* Add signer certificate and optional certificate chain. */
737
if (TS_REQ_get_cert_req(ctx->request))
739
PKCS7_add_certificate(p7, ctx->signer_cert);
742
for(i = 0; i < sk_X509_num(ctx->certs); ++i)
744
X509 *cert = sk_X509_value(ctx->certs, i);
745
PKCS7_add_certificate(p7, cert);
750
/* Add a new signer info. */
751
if (!(si = PKCS7_add_signature(p7, ctx->signer_cert,
752
ctx->signer_key, EVP_sha1())))
754
TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR);
758
/* Add content type signed attribute to the signer info. */
759
oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
760
if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
763
TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR);
767
/* Create the ESS SigningCertificate attribute which contains
768
the signer certificate id and optionally the certificate chain. */
769
certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL;
770
if (!(sc = ESS_SIGNING_CERT_new_init(ctx->signer_cert, certs)))
773
/* Add SigningCertificate signed attribute to the signer info. */
774
if (!ESS_add_signing_cert(si, sc))
776
TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR);
780
/* Add a new empty NID_id_smime_ct_TSTInfo encapsulated content. */
781
if (!TS_TST_INFO_content_new(p7)) goto err;
783
/* Add the DER encoded tst_info to the PKCS7 structure. */
784
if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
785
TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
789
/* Convert tst_info to DER. */
790
if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info))
792
TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
796
/* Create the signature and add it to the signer info. */
797
if (!PKCS7_dataFinal(p7, p7bio))
799
TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
803
/* Set new PKCS7 and TST_INFO objects. */
804
TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info);
805
p7 = NULL; /* Ownership is lost. */
806
ctx->tst_info = NULL; /* Ownership is lost. */
811
TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
812
"Error during signature "
815
ESS_SIGNING_CERT_free(sc);
820
static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert,
821
STACK_OF(X509) *certs)
824
ESS_SIGNING_CERT *sc = NULL;
827
/* Creating the ESS_CERT_ID stack. */
828
if (!(sc = ESS_SIGNING_CERT_new())) goto err;
829
if (!sc->cert_ids && !(sc->cert_ids = sk_ESS_CERT_ID_new_null()))
832
/* Adding the signing certificate id. */
833
if (!(cid = ESS_CERT_ID_new_init(signcert, 0))
834
|| !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
836
/* Adding the certificate chain ids. */
837
for (i = 0; i < sk_X509_num(certs); ++i)
839
X509 *cert = sk_X509_value(certs, i);
840
if (!(cid = ESS_CERT_ID_new_init(cert, 1))
841
|| !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
847
ESS_SIGNING_CERT_free(sc);
848
TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE);
852
static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed)
854
ESS_CERT_ID *cid = NULL;
855
GENERAL_NAME *name = NULL;
857
/* Recompute SHA1 hash of certificate if necessary (side effect). */
858
X509_check_purpose(cert, -1, 0);
860
if (!(cid = ESS_CERT_ID_new())) goto err;
861
if (!ASN1_OCTET_STRING_set(cid->hash, cert->sha1_hash,
862
sizeof(cert->sha1_hash)))
865
/* Setting the issuer/serial if requested. */
868
/* Creating issuer/serial structure. */
869
if (!cid->issuer_serial
870
&& !(cid->issuer_serial = ESS_ISSUER_SERIAL_new()))
872
/* Creating general name from the certificate issuer. */
873
if (!(name = GENERAL_NAME_new())) goto err;
874
name->type = GEN_DIRNAME;
875
if (!(name->d.dirn = X509_NAME_dup(cert->cert_info->issuer)))
877
if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
879
name = NULL; /* Ownership is lost. */
880
/* Setting the serial number. */
881
ASN1_INTEGER_free(cid->issuer_serial->serial);
882
if (!(cid->issuer_serial->serial =
883
ASN1_INTEGER_dup(cert->cert_info->serialNumber)))
889
GENERAL_NAME_free(name);
890
ESS_CERT_ID_free(cid);
891
TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE);
895
static int TS_TST_INFO_content_new(PKCS7 *p7)
898
ASN1_OCTET_STRING *octet_string = NULL;
900
/* Create new encapsulated NID_id_smime_ct_TSTInfo content. */
901
if (!(ret = PKCS7_new())) goto err;
902
if (!(ret->d.other = ASN1_TYPE_new())) goto err;
903
ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
904
if (!(octet_string = ASN1_OCTET_STRING_new())) goto err;
905
ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string);
908
/* Add encapsulated content to signed PKCS7 structure. */
909
if (!PKCS7_set_content(p7, ret)) goto err;
913
ASN1_OCTET_STRING_free(octet_string);
918
static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc)
920
ASN1_STRING *seq = NULL;
921
unsigned char *p, *pp = NULL;
924
len = i2d_ESS_SIGNING_CERT(sc, NULL);
925
if (!(pp = (unsigned char *) OPENSSL_malloc(len)))
927
TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
931
i2d_ESS_SIGNING_CERT(sc, &p);
932
if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len))
934
TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
937
OPENSSL_free(pp); pp = NULL;
938
return PKCS7_add_signed_attribute(si,
939
NID_id_smime_aa_signingCertificate,
940
V_ASN1_SEQUENCE, seq);
942
ASN1_STRING_free(seq);
949
static ASN1_GENERALIZEDTIME *
950
TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *asn1_time,
951
long sec, long usec, unsigned precision)
953
time_t time_sec = (time_t) sec;
954
struct tm *tm = NULL;
955
char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS];
956
char *p = genTime_str;
957
char *p_end = genTime_str + sizeof(genTime_str);
959
if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
963
if (!(tm = gmtime(&time_sec)))
967
* Put "genTime_str" in GeneralizedTime format. We work around the
968
* restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST
969
* NOT include fractional seconds") and OpenSSL related functions to
970
* meet the rfc3161 requirement: "GeneralizedTime syntax can include
971
* fraction-of-second details".
973
p += BIO_snprintf(p, p_end - p,
974
"%04d%02d%02d%02d%02d%02d",
975
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
976
tm->tm_hour, tm->tm_min, tm->tm_sec);
979
/* Add fraction of seconds (leave space for dot and null). */
980
BIO_snprintf(p, 2 + precision, ".%ld", usec);
981
/* We cannot use the snprintf return value,
982
because it might have been truncated. */
985
/* To make things a bit harder, X.690 | ISO/IEC 8825-1 provides
986
the following restrictions for a DER-encoding, which OpenSSL
987
(specifically ASN1_GENERALIZEDTIME_check() function) doesn't
989
"The encoding MUST terminate with a "Z" (which means "Zulu"
990
time). The decimal point element, if present, MUST be the
991
point option ".". The fractional-seconds elements,
992
if present, MUST omit all trailing 0's;
993
if the elements correspond to 0, they MUST be wholly
994
omitted, and the decimal point element also MUST be
996
/* Remove trailing zeros. The dot guarantees the exit
997
condition of this loop even if all the digits are zero. */
1000
/* p points to either the dot or the last non-zero digit. */
1003
/* Add the trailing Z and the terminating null. */
1007
/* Now call OpenSSL to check and set our genTime value */
1008
if (!asn1_time && !(asn1_time = M_ASN1_GENERALIZEDTIME_new()))
1010
if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str))
1012
ASN1_GENERALIZEDTIME_free(asn1_time);
1018
TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME);