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[thirdparty/openssl.git] / crypto / ts / ts_rsp_sign.c
1 /*
2 * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include "internal/cryptlib.h"
11
12 #if defined(OPENSSL_SYS_UNIX)
13 # include <sys/time.h>
14 #endif
15
16 #include <openssl/objects.h>
17 #include <openssl/ts.h>
18 #include <openssl/pkcs7.h>
19 #include "ts_lcl.h"
20
21 static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *, void *);
22 static int def_time_cb(struct TS_resp_ctx *, void *, long *sec, long *usec);
23 static int def_extension_cb(struct TS_resp_ctx *, X509_EXTENSION *, void *);
24
25 static void ts_RESP_CTX_init(TS_RESP_CTX *ctx);
26 static void ts_RESP_CTX_cleanup(TS_RESP_CTX *ctx);
27 static int ts_RESP_check_request(TS_RESP_CTX *ctx);
28 static ASN1_OBJECT *ts_RESP_get_policy(TS_RESP_CTX *ctx);
29 static TS_TST_INFO *ts_RESP_create_tst_info(TS_RESP_CTX *ctx,
30 ASN1_OBJECT *policy);
31 static int ts_RESP_process_extensions(TS_RESP_CTX *ctx);
32 static int ts_RESP_sign(TS_RESP_CTX *ctx);
33
34 static ESS_SIGNING_CERT *ess_SIGNING_CERT_new_init(X509 *signcert,
35 STACK_OF(X509) *certs);
36 static ESS_CERT_ID *ess_CERT_ID_new_init(X509 *cert, int issuer_needed);
37 static int ts_TST_INFO_content_new(PKCS7 *p7);
38 static int ess_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc);
39
40 static ESS_SIGNING_CERT_V2 *ess_signing_cert_v2_new_init(const EVP_MD *hash_alg,
41 X509 *signcert,
42 STACK_OF(X509)
43 *certs);
44 static ESS_CERT_ID_V2 *ess_cert_id_v2_new_init(const EVP_MD *hash_alg,
45 X509 *cert, int issuer_needed);
46 static int ess_add_signing_cert_v2(PKCS7_SIGNER_INFO *si,
47 ESS_SIGNING_CERT_V2 *sc);
48
49 static ASN1_GENERALIZEDTIME
50 *TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *, long, long,
51 unsigned);
52
53 /* Default callback for response generation. */
54 static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *ctx, void *data)
55 {
56 ASN1_INTEGER *serial = ASN1_INTEGER_new();
57
58 if (serial == NULL)
59 goto err;
60 if (!ASN1_INTEGER_set(serial, 1))
61 goto err;
62 return serial;
63
64 err:
65 TSerr(TS_F_DEF_SERIAL_CB, ERR_R_MALLOC_FAILURE);
66 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
67 "Error during serial number generation.");
68 return NULL;
69 }
70
71 #if defined(OPENSSL_SYS_UNIX)
72
73 static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
74 long *sec, long *usec)
75 {
76 struct timeval tv;
77 if (gettimeofday(&tv, NULL) != 0) {
78 TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
79 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
80 "Time is not available.");
81 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
82 return 0;
83 }
84 *sec = tv.tv_sec;
85 *usec = tv.tv_usec;
86
87 return 1;
88 }
89
90 #else
91
92 static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
93 long *sec, long *usec)
94 {
95 time_t t;
96 if (time(&t) == (time_t)-1) {
97 TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
98 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
99 "Time is not available.");
100 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
101 return 0;
102 }
103 *sec = (long)t;
104 *usec = 0;
105
106 return 1;
107 }
108
109 #endif
110
111 static int def_extension_cb(struct TS_resp_ctx *ctx, X509_EXTENSION *ext,
112 void *data)
113 {
114 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
115 "Unsupported extension.");
116 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_EXTENSION);
117 return 0;
118 }
119
120 /* TS_RESP_CTX management functions. */
121
122 TS_RESP_CTX *TS_RESP_CTX_new()
123 {
124 TS_RESP_CTX *ctx;
125
126 if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) {
127 TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE);
128 return NULL;
129 }
130
131 ctx->signer_md = EVP_sha256();
132
133 ctx->serial_cb = def_serial_cb;
134 ctx->time_cb = def_time_cb;
135 ctx->extension_cb = def_extension_cb;
136
137 return ctx;
138 }
139
140 void TS_RESP_CTX_free(TS_RESP_CTX *ctx)
141 {
142 if (!ctx)
143 return;
144
145 X509_free(ctx->signer_cert);
146 EVP_PKEY_free(ctx->signer_key);
147 sk_X509_pop_free(ctx->certs, X509_free);
148 sk_ASN1_OBJECT_pop_free(ctx->policies, ASN1_OBJECT_free);
149 ASN1_OBJECT_free(ctx->default_policy);
150 sk_EVP_MD_free(ctx->mds); /* No EVP_MD_free method exists. */
151 ASN1_INTEGER_free(ctx->seconds);
152 ASN1_INTEGER_free(ctx->millis);
153 ASN1_INTEGER_free(ctx->micros);
154 OPENSSL_free(ctx);
155 }
156
157 int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX *ctx, X509 *signer)
158 {
159 if (X509_check_purpose(signer, X509_PURPOSE_TIMESTAMP_SIGN, 0) != 1) {
160 TSerr(TS_F_TS_RESP_CTX_SET_SIGNER_CERT,
161 TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE);
162 return 0;
163 }
164 X509_free(ctx->signer_cert);
165 ctx->signer_cert = signer;
166 X509_up_ref(ctx->signer_cert);
167 return 1;
168 }
169
170 int TS_RESP_CTX_set_signer_key(TS_RESP_CTX *ctx, EVP_PKEY *key)
171 {
172 EVP_PKEY_free(ctx->signer_key);
173 ctx->signer_key = key;
174 EVP_PKEY_up_ref(ctx->signer_key);
175
176 return 1;
177 }
178
179 int TS_RESP_CTX_set_signer_digest(TS_RESP_CTX *ctx, const EVP_MD *md)
180 {
181 ctx->signer_md = md;
182 return 1;
183 }
184
185 int TS_RESP_CTX_set_def_policy(TS_RESP_CTX *ctx, const ASN1_OBJECT *def_policy)
186 {
187 ASN1_OBJECT_free(ctx->default_policy);
188 if ((ctx->default_policy = OBJ_dup(def_policy)) == NULL)
189 goto err;
190 return 1;
191 err:
192 TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE);
193 return 0;
194 }
195
196 int TS_RESP_CTX_set_certs(TS_RESP_CTX *ctx, STACK_OF(X509) *certs)
197 {
198
199 sk_X509_pop_free(ctx->certs, X509_free);
200 ctx->certs = NULL;
201 if (!certs)
202 return 1;
203 if ((ctx->certs = X509_chain_up_ref(certs)) == NULL) {
204 TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE);
205 return 0;
206 }
207
208 return 1;
209 }
210
211 int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, const ASN1_OBJECT *policy)
212 {
213 ASN1_OBJECT *copy = NULL;
214
215 if (ctx->policies == NULL
216 && (ctx->policies = sk_ASN1_OBJECT_new_null()) == NULL)
217 goto err;
218 if ((copy = OBJ_dup(policy)) == NULL)
219 goto err;
220 if (!sk_ASN1_OBJECT_push(ctx->policies, copy))
221 goto err;
222
223 return 1;
224 err:
225 TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE);
226 ASN1_OBJECT_free(copy);
227 return 0;
228 }
229
230 int TS_RESP_CTX_add_md(TS_RESP_CTX *ctx, const EVP_MD *md)
231 {
232 if (ctx->mds == NULL
233 && (ctx->mds = sk_EVP_MD_new_null()) == NULL)
234 goto err;
235 if (!sk_EVP_MD_push(ctx->mds, md))
236 goto err;
237
238 return 1;
239 err:
240 TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE);
241 return 0;
242 }
243
244 #define TS_RESP_CTX_accuracy_free(ctx) \
245 ASN1_INTEGER_free(ctx->seconds); \
246 ctx->seconds = NULL; \
247 ASN1_INTEGER_free(ctx->millis); \
248 ctx->millis = NULL; \
249 ASN1_INTEGER_free(ctx->micros); \
250 ctx->micros = NULL;
251
252 int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx,
253 int secs, int millis, int micros)
254 {
255
256 TS_RESP_CTX_accuracy_free(ctx);
257 if (secs
258 && ((ctx->seconds = ASN1_INTEGER_new()) == NULL
259 || !ASN1_INTEGER_set(ctx->seconds, secs)))
260 goto err;
261 if (millis
262 && ((ctx->millis = ASN1_INTEGER_new()) == NULL
263 || !ASN1_INTEGER_set(ctx->millis, millis)))
264 goto err;
265 if (micros
266 && ((ctx->micros = ASN1_INTEGER_new()) == NULL
267 || !ASN1_INTEGER_set(ctx->micros, micros)))
268 goto err;
269
270 return 1;
271 err:
272 TS_RESP_CTX_accuracy_free(ctx);
273 TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE);
274 return 0;
275 }
276
277 void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags)
278 {
279 ctx->flags |= flags;
280 }
281
282 void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data)
283 {
284 ctx->serial_cb = cb;
285 ctx->serial_cb_data = data;
286 }
287
288 void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data)
289 {
290 ctx->time_cb = cb;
291 ctx->time_cb_data = data;
292 }
293
294 void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx,
295 TS_extension_cb cb, void *data)
296 {
297 ctx->extension_cb = cb;
298 ctx->extension_cb_data = data;
299 }
300
301 int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx,
302 int status, const char *text)
303 {
304 TS_STATUS_INFO *si = NULL;
305 ASN1_UTF8STRING *utf8_text = NULL;
306 int ret = 0;
307
308 if ((si = TS_STATUS_INFO_new()) == NULL)
309 goto err;
310 if (!ASN1_INTEGER_set(si->status, status))
311 goto err;
312 if (text) {
313 if ((utf8_text = ASN1_UTF8STRING_new()) == NULL
314 || !ASN1_STRING_set(utf8_text, text, strlen(text)))
315 goto err;
316 if (si->text == NULL
317 && (si->text = sk_ASN1_UTF8STRING_new_null()) == NULL)
318 goto err;
319 if (!sk_ASN1_UTF8STRING_push(si->text, utf8_text))
320 goto err;
321 utf8_text = NULL; /* Ownership is lost. */
322 }
323 if (!TS_RESP_set_status_info(ctx->response, si))
324 goto err;
325 ret = 1;
326 err:
327 if (!ret)
328 TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE);
329 TS_STATUS_INFO_free(si);
330 ASN1_UTF8STRING_free(utf8_text);
331 return ret;
332 }
333
334 int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx,
335 int status, const char *text)
336 {
337 int ret = 1;
338 TS_STATUS_INFO *si = ctx->response->status_info;
339
340 if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED) {
341 ret = TS_RESP_CTX_set_status_info(ctx, status, text);
342 }
343 return ret;
344 }
345
346 int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure)
347 {
348 TS_STATUS_INFO *si = ctx->response->status_info;
349 if (si->failure_info == NULL
350 && (si->failure_info = ASN1_BIT_STRING_new()) == NULL)
351 goto err;
352 if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1))
353 goto err;
354 return 1;
355 err:
356 TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE);
357 return 0;
358 }
359
360 TS_REQ *TS_RESP_CTX_get_request(TS_RESP_CTX *ctx)
361 {
362 return ctx->request;
363 }
364
365 TS_TST_INFO *TS_RESP_CTX_get_tst_info(TS_RESP_CTX *ctx)
366 {
367 return ctx->tst_info;
368 }
369
370 int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx,
371 unsigned precision)
372 {
373 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
374 return 0;
375 ctx->clock_precision_digits = precision;
376 return 1;
377 }
378
379 /* Main entry method of the response generation. */
380 TS_RESP *TS_RESP_create_response(TS_RESP_CTX *ctx, BIO *req_bio)
381 {
382 ASN1_OBJECT *policy;
383 TS_RESP *response;
384 int result = 0;
385
386 ts_RESP_CTX_init(ctx);
387
388 if ((ctx->response = TS_RESP_new()) == NULL) {
389 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE);
390 goto end;
391 }
392 if ((ctx->request = d2i_TS_REQ_bio(req_bio, NULL)) == NULL) {
393 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
394 "Bad request format or system error.");
395 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
396 goto end;
397 }
398 if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL))
399 goto end;
400 if (!ts_RESP_check_request(ctx))
401 goto end;
402 if ((policy = ts_RESP_get_policy(ctx)) == NULL)
403 goto end;
404 if ((ctx->tst_info = ts_RESP_create_tst_info(ctx, policy)) == NULL)
405 goto end;
406 if (!ts_RESP_process_extensions(ctx))
407 goto end;
408 if (!ts_RESP_sign(ctx))
409 goto end;
410 result = 1;
411
412 end:
413 if (!result) {
414 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR);
415 if (ctx->response != NULL) {
416 if (TS_RESP_CTX_set_status_info_cond(ctx,
417 TS_STATUS_REJECTION,
418 "Error during response "
419 "generation.") == 0) {
420 TS_RESP_free(ctx->response);
421 ctx->response = NULL;
422 }
423 }
424 }
425 response = ctx->response;
426 ctx->response = NULL; /* Ownership will be returned to caller. */
427 ts_RESP_CTX_cleanup(ctx);
428 return response;
429 }
430
431 /* Initializes the variable part of the context. */
432 static void ts_RESP_CTX_init(TS_RESP_CTX *ctx)
433 {
434 ctx->request = NULL;
435 ctx->response = NULL;
436 ctx->tst_info = NULL;
437 }
438
439 /* Cleans up the variable part of the context. */
440 static void ts_RESP_CTX_cleanup(TS_RESP_CTX *ctx)
441 {
442 TS_REQ_free(ctx->request);
443 ctx->request = NULL;
444 TS_RESP_free(ctx->response);
445 ctx->response = NULL;
446 TS_TST_INFO_free(ctx->tst_info);
447 ctx->tst_info = NULL;
448 }
449
450 /* Checks the format and content of the request. */
451 static int ts_RESP_check_request(TS_RESP_CTX *ctx)
452 {
453 TS_REQ *request = ctx->request;
454 TS_MSG_IMPRINT *msg_imprint;
455 X509_ALGOR *md_alg;
456 int md_alg_id;
457 const ASN1_OCTET_STRING *digest;
458 const EVP_MD *md = NULL;
459 int i;
460
461 if (TS_REQ_get_version(request) != 1) {
462 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
463 "Bad request version.");
464 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_REQUEST);
465 return 0;
466 }
467
468 msg_imprint = request->msg_imprint;
469 md_alg = msg_imprint->hash_algo;
470 md_alg_id = OBJ_obj2nid(md_alg->algorithm);
471 for (i = 0; !md && i < sk_EVP_MD_num(ctx->mds); ++i) {
472 const EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i);
473 if (md_alg_id == EVP_MD_type(current_md))
474 md = current_md;
475 }
476 if (!md) {
477 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
478 "Message digest algorithm is "
479 "not supported.");
480 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
481 return 0;
482 }
483
484 if (md_alg->parameter && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL) {
485 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
486 "Superfluous message digest "
487 "parameter.");
488 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
489 return 0;
490 }
491 digest = msg_imprint->hashed_msg;
492 if (digest->length != EVP_MD_size(md)) {
493 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
494 "Bad message digest.");
495 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
496 return 0;
497 }
498
499 return 1;
500 }
501
502 /* Returns the TSA policy based on the requested and acceptable policies. */
503 static ASN1_OBJECT *ts_RESP_get_policy(TS_RESP_CTX *ctx)
504 {
505 ASN1_OBJECT *requested = ctx->request->policy_id;
506 ASN1_OBJECT *policy = NULL;
507 int i;
508
509 if (ctx->default_policy == NULL) {
510 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER);
511 return NULL;
512 }
513 if (!requested || !OBJ_cmp(requested, ctx->default_policy))
514 policy = ctx->default_policy;
515
516 /* Check if the policy is acceptable. */
517 for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i) {
518 ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i);
519 if (!OBJ_cmp(requested, current))
520 policy = current;
521 }
522 if (!policy) {
523 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY);
524 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
525 "Requested policy is not " "supported.");
526 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY);
527 }
528 return policy;
529 }
530
531 /* Creates the TS_TST_INFO object based on the settings of the context. */
532 static TS_TST_INFO *ts_RESP_create_tst_info(TS_RESP_CTX *ctx,
533 ASN1_OBJECT *policy)
534 {
535 int result = 0;
536 TS_TST_INFO *tst_info = NULL;
537 ASN1_INTEGER *serial = NULL;
538 ASN1_GENERALIZEDTIME *asn1_time = NULL;
539 long sec, usec;
540 TS_ACCURACY *accuracy = NULL;
541 const ASN1_INTEGER *nonce;
542 GENERAL_NAME *tsa_name = NULL;
543
544 if ((tst_info = TS_TST_INFO_new()) == NULL)
545 goto end;
546 if (!TS_TST_INFO_set_version(tst_info, 1))
547 goto end;
548 if (!TS_TST_INFO_set_policy_id(tst_info, policy))
549 goto end;
550 if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint))
551 goto end;
552 if ((serial = ctx->serial_cb(ctx, ctx->serial_cb_data)) == NULL
553 || !TS_TST_INFO_set_serial(tst_info, serial))
554 goto end;
555 if (!ctx->time_cb(ctx, ctx->time_cb_data, &sec, &usec)
556 || (asn1_time =
557 TS_RESP_set_genTime_with_precision(NULL, sec, usec,
558 ctx->clock_precision_digits)) == NULL
559 || !TS_TST_INFO_set_time(tst_info, asn1_time))
560 goto end;
561
562 if ((ctx->seconds || ctx->millis || ctx->micros)
563 && (accuracy = TS_ACCURACY_new()) == NULL)
564 goto end;
565 if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds))
566 goto end;
567 if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis))
568 goto end;
569 if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros))
570 goto end;
571 if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy))
572 goto end;
573
574 if ((ctx->flags & TS_ORDERING)
575 && !TS_TST_INFO_set_ordering(tst_info, 1))
576 goto end;
577
578 if ((nonce = ctx->request->nonce) != NULL
579 && !TS_TST_INFO_set_nonce(tst_info, nonce))
580 goto end;
581
582 if (ctx->flags & TS_TSA_NAME) {
583 if ((tsa_name = GENERAL_NAME_new()) == NULL)
584 goto end;
585 tsa_name->type = GEN_DIRNAME;
586 tsa_name->d.dirn =
587 X509_NAME_dup(X509_get_subject_name(ctx->signer_cert));
588 if (!tsa_name->d.dirn)
589 goto end;
590 if (!TS_TST_INFO_set_tsa(tst_info, tsa_name))
591 goto end;
592 }
593
594 result = 1;
595 end:
596 if (!result) {
597 TS_TST_INFO_free(tst_info);
598 tst_info = NULL;
599 TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR);
600 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
601 "Error during TSTInfo "
602 "generation.");
603 }
604 GENERAL_NAME_free(tsa_name);
605 TS_ACCURACY_free(accuracy);
606 ASN1_GENERALIZEDTIME_free(asn1_time);
607 ASN1_INTEGER_free(serial);
608
609 return tst_info;
610 }
611
612 /* Processing the extensions of the request. */
613 static int ts_RESP_process_extensions(TS_RESP_CTX *ctx)
614 {
615 STACK_OF(X509_EXTENSION) *exts = ctx->request->extensions;
616 int i;
617 int ok = 1;
618
619 for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i) {
620 X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
621 /*
622 * The last argument was previously (void *)ctx->extension_cb,
623 * but ISO C doesn't permit converting a function pointer to void *.
624 * For lack of better information, I'm placing a NULL there instead.
625 * The callback can pick its own address out from the ctx anyway...
626 */
627 ok = (*ctx->extension_cb) (ctx, ext, NULL);
628 }
629
630 return ok;
631 }
632
633 /* Functions for signing the TS_TST_INFO structure of the context. */
634 static int ts_RESP_sign(TS_RESP_CTX *ctx)
635 {
636 int ret = 0;
637 PKCS7 *p7 = NULL;
638 PKCS7_SIGNER_INFO *si;
639 STACK_OF(X509) *certs; /* Certificates to include in sc. */
640 ESS_SIGNING_CERT_V2 *sc2 = NULL;
641 ESS_SIGNING_CERT *sc = NULL;
642 ASN1_OBJECT *oid;
643 BIO *p7bio = NULL;
644 int i;
645
646 if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) {
647 TSerr(TS_F_TS_RESP_SIGN, TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
648 goto err;
649 }
650
651 if ((p7 = PKCS7_new()) == NULL) {
652 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
653 goto err;
654 }
655 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
656 goto err;
657 if (!ASN1_INTEGER_set(p7->d.sign->version, 3))
658 goto err;
659
660 if (ctx->request->cert_req) {
661 PKCS7_add_certificate(p7, ctx->signer_cert);
662 if (ctx->certs) {
663 for (i = 0; i < sk_X509_num(ctx->certs); ++i) {
664 X509 *cert = sk_X509_value(ctx->certs, i);
665 PKCS7_add_certificate(p7, cert);
666 }
667 }
668 }
669
670 if ((si = PKCS7_add_signature(p7, ctx->signer_cert,
671 ctx->signer_key, ctx->signer_md)) == NULL) {
672 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR);
673 goto err;
674 }
675
676 oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
677 if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
678 V_ASN1_OBJECT, oid)) {
679 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR);
680 goto err;
681 }
682
683 certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL;
684 if (ctx->ess_cert_id_digest == EVP_sha1()) {
685 if ((sc = ess_SIGNING_CERT_new_init(ctx->signer_cert, certs)) == NULL)
686 goto err;
687
688 if (!ess_add_signing_cert(si, sc)) {
689 TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR);
690 goto err;
691 }
692 } else {
693 sc2 = ess_signing_cert_v2_new_init(ctx->ess_cert_id_digest,
694 ctx->signer_cert, certs);
695 if (sc2 == NULL)
696 goto err;
697
698 if (!ess_add_signing_cert_v2(si, sc2)) {
699 TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_V2_ERROR);
700 goto err;
701 }
702 }
703
704 if (!ts_TST_INFO_content_new(p7))
705 goto err;
706 if ((p7bio = PKCS7_dataInit(p7, NULL)) == NULL) {
707 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
708 goto err;
709 }
710 if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info)) {
711 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
712 goto err;
713 }
714 if (!PKCS7_dataFinal(p7, p7bio)) {
715 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
716 goto err;
717 }
718 TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info);
719 p7 = NULL; /* Ownership is lost. */
720 ctx->tst_info = NULL; /* Ownership is lost. */
721
722 ret = 1;
723 err:
724 if (!ret)
725 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
726 "Error during signature "
727 "generation.");
728 BIO_free_all(p7bio);
729 ESS_SIGNING_CERT_V2_free(sc2);
730 ESS_SIGNING_CERT_free(sc);
731 PKCS7_free(p7);
732 return ret;
733 }
734
735 static ESS_SIGNING_CERT *ess_SIGNING_CERT_new_init(X509 *signcert,
736 STACK_OF(X509) *certs)
737 {
738 ESS_CERT_ID *cid;
739 ESS_SIGNING_CERT *sc = NULL;
740 int i;
741
742 if ((sc = ESS_SIGNING_CERT_new()) == NULL)
743 goto err;
744 if (sc->cert_ids == NULL
745 && (sc->cert_ids = sk_ESS_CERT_ID_new_null()) == NULL)
746 goto err;
747
748 if ((cid = ess_CERT_ID_new_init(signcert, 0)) == NULL
749 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
750 goto err;
751 for (i = 0; i < sk_X509_num(certs); ++i) {
752 X509 *cert = sk_X509_value(certs, i);
753 if ((cid = ess_CERT_ID_new_init(cert, 1)) == NULL
754 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
755 goto err;
756 }
757
758 return sc;
759 err:
760 ESS_SIGNING_CERT_free(sc);
761 TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE);
762 return NULL;
763 }
764
765 static ESS_CERT_ID *ess_CERT_ID_new_init(X509 *cert, int issuer_needed)
766 {
767 ESS_CERT_ID *cid = NULL;
768 GENERAL_NAME *name = NULL;
769 unsigned char cert_sha1[SHA_DIGEST_LENGTH];
770
771 /* Call for side-effect of computing hash and caching extensions */
772 X509_check_purpose(cert, -1, 0);
773 if ((cid = ESS_CERT_ID_new()) == NULL)
774 goto err;
775 X509_digest(cert, EVP_sha1(), cert_sha1, NULL);
776 if (!ASN1_OCTET_STRING_set(cid->hash, cert_sha1, SHA_DIGEST_LENGTH))
777 goto err;
778
779 /* Setting the issuer/serial if requested. */
780 if (issuer_needed) {
781 if (cid->issuer_serial == NULL
782 && (cid->issuer_serial = ESS_ISSUER_SERIAL_new()) == NULL)
783 goto err;
784 if ((name = GENERAL_NAME_new()) == NULL)
785 goto err;
786 name->type = GEN_DIRNAME;
787 if ((name->d.dirn = X509_NAME_dup(X509_get_issuer_name(cert))) == NULL)
788 goto err;
789 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
790 goto err;
791 name = NULL; /* Ownership is lost. */
792 ASN1_INTEGER_free(cid->issuer_serial->serial);
793 if (!(cid->issuer_serial->serial =
794 ASN1_INTEGER_dup(X509_get_serialNumber(cert))))
795 goto err;
796 }
797
798 return cid;
799 err:
800 GENERAL_NAME_free(name);
801 ESS_CERT_ID_free(cid);
802 TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE);
803 return NULL;
804 }
805
806 static int ts_TST_INFO_content_new(PKCS7 *p7)
807 {
808 PKCS7 *ret = NULL;
809 ASN1_OCTET_STRING *octet_string = NULL;
810
811 /* Create new encapsulated NID_id_smime_ct_TSTInfo content. */
812 if ((ret = PKCS7_new()) == NULL)
813 goto err;
814 if ((ret->d.other = ASN1_TYPE_new()) == NULL)
815 goto err;
816 ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
817 if ((octet_string = ASN1_OCTET_STRING_new()) == NULL)
818 goto err;
819 ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string);
820 octet_string = NULL;
821
822 /* Add encapsulated content to signed PKCS7 structure. */
823 if (!PKCS7_set_content(p7, ret))
824 goto err;
825
826 return 1;
827 err:
828 ASN1_OCTET_STRING_free(octet_string);
829 PKCS7_free(ret);
830 return 0;
831 }
832
833 static int ess_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc)
834 {
835 ASN1_STRING *seq = NULL;
836 unsigned char *p, *pp = NULL;
837 int len;
838
839 len = i2d_ESS_SIGNING_CERT(sc, NULL);
840 if ((pp = OPENSSL_malloc(len)) == NULL) {
841 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
842 goto err;
843 }
844 p = pp;
845 i2d_ESS_SIGNING_CERT(sc, &p);
846 if ((seq = ASN1_STRING_new()) == NULL || !ASN1_STRING_set(seq, pp, len)) {
847 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
848 goto err;
849 }
850 OPENSSL_free(pp);
851 pp = NULL;
852 return PKCS7_add_signed_attribute(si,
853 NID_id_smime_aa_signingCertificate,
854 V_ASN1_SEQUENCE, seq);
855 err:
856 ASN1_STRING_free(seq);
857 OPENSSL_free(pp);
858
859 return 0;
860 }
861
862 static ESS_SIGNING_CERT_V2 *ess_signing_cert_v2_new_init(const EVP_MD *hash_alg,
863 X509 *signcert,
864 STACK_OF(X509) *certs)
865 {
866 ESS_CERT_ID_V2 *cid = NULL;
867 ESS_SIGNING_CERT_V2 *sc = NULL;
868 int i;
869
870 if ((sc = ESS_SIGNING_CERT_V2_new()) == NULL)
871 goto err;
872 if ((cid = ess_cert_id_v2_new_init(hash_alg, signcert, 0)) == NULL)
873 goto err;
874 if (!sk_ESS_CERT_ID_V2_push(sc->cert_ids, cid))
875 goto err;
876 cid = NULL;
877
878 for (i = 0; i < sk_X509_num(certs); ++i) {
879 X509 *cert = sk_X509_value(certs, i);
880
881 if ((cid = ess_cert_id_v2_new_init(hash_alg, cert, 1)) == NULL)
882 goto err;
883 if (!sk_ESS_CERT_ID_V2_push(sc->cert_ids, cid))
884 goto err;
885 cid = NULL;
886 }
887
888 return sc;
889 err:
890 ESS_SIGNING_CERT_V2_free(sc);
891 ESS_CERT_ID_V2_free(cid);
892 TSerr(TS_F_ESS_SIGNING_CERT_V2_NEW_INIT, ERR_R_MALLOC_FAILURE);
893 return NULL;
894 }
895
896 static ESS_CERT_ID_V2 *ess_cert_id_v2_new_init(const EVP_MD *hash_alg,
897 X509 *cert, int issuer_needed)
898 {
899 ESS_CERT_ID_V2 *cid = NULL;
900 GENERAL_NAME *name = NULL;
901 unsigned char hash[EVP_MAX_MD_SIZE];
902 unsigned int hash_len = sizeof(hash);
903 X509_ALGOR *alg = NULL;
904
905 memset(hash, 0, sizeof(hash));
906
907 if ((cid = ESS_CERT_ID_V2_new()) == NULL)
908 goto err;
909
910 if (hash_alg != EVP_sha256()) {
911 alg = X509_ALGOR_new();
912 if (alg == NULL)
913 goto err;
914 X509_ALGOR_set_md(alg, hash_alg);
915 if (alg->algorithm == NULL)
916 goto err;
917 cid->hash_alg = alg;
918 alg = NULL;
919 } else {
920 cid->hash_alg = NULL;
921 }
922
923 if (!X509_digest(cert, hash_alg, hash, &hash_len))
924 goto err;
925
926 if (!ASN1_OCTET_STRING_set(cid->hash, hash, hash_len))
927 goto err;
928
929 if (issuer_needed) {
930 if ((cid->issuer_serial = ESS_ISSUER_SERIAL_new()) == NULL)
931 goto err;
932 if ((name = GENERAL_NAME_new()) == NULL)
933 goto err;
934 name->type = GEN_DIRNAME;
935 if ((name->d.dirn = X509_NAME_dup(X509_get_issuer_name(cert))) == NULL)
936 goto err;
937 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
938 goto err;
939 name = NULL; /* Ownership is lost. */
940 ASN1_INTEGER_free(cid->issuer_serial->serial);
941 cid->issuer_serial->serial =
942 ASN1_INTEGER_dup(X509_get_serialNumber(cert));
943 if (cid->issuer_serial->serial == NULL)
944 goto err;
945 }
946
947 return cid;
948 err:
949 X509_ALGOR_free(alg);
950 GENERAL_NAME_free(name);
951 ESS_CERT_ID_V2_free(cid);
952 TSerr(TS_F_ESS_CERT_ID_V2_NEW_INIT, ERR_R_MALLOC_FAILURE);
953 return NULL;
954 }
955
956 static int ess_add_signing_cert_v2(PKCS7_SIGNER_INFO *si,
957 ESS_SIGNING_CERT_V2 *sc)
958 {
959 ASN1_STRING *seq = NULL;
960 unsigned char *p, *pp = NULL;
961 int len = i2d_ESS_SIGNING_CERT_V2(sc, NULL);
962
963 if ((pp = OPENSSL_malloc(len)) == NULL) {
964 TSerr(TS_F_ESS_ADD_SIGNING_CERT_V2, ERR_R_MALLOC_FAILURE);
965 goto err;
966 }
967
968 p = pp;
969 i2d_ESS_SIGNING_CERT_V2(sc, &p);
970 if ((seq = ASN1_STRING_new()) == NULL || !ASN1_STRING_set(seq, pp, len)) {
971 TSerr(TS_F_ESS_ADD_SIGNING_CERT_V2, ERR_R_MALLOC_FAILURE);
972 goto err;
973 }
974
975 OPENSSL_free(pp);
976 pp = NULL;
977 return PKCS7_add_signed_attribute(si,
978 NID_id_smime_aa_signingCertificateV2,
979 V_ASN1_SEQUENCE, seq);
980 err:
981 ASN1_STRING_free(seq);
982 OPENSSL_free(pp);
983 return 0;
984 }
985
986 static ASN1_GENERALIZEDTIME *TS_RESP_set_genTime_with_precision(
987 ASN1_GENERALIZEDTIME *asn1_time, long sec, long usec,
988 unsigned precision)
989 {
990 time_t time_sec = (time_t)sec;
991 struct tm *tm = NULL;
992 char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS];
993 char *p = genTime_str;
994 char *p_end = genTime_str + sizeof(genTime_str);
995
996 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
997 goto err;
998
999 if ((tm = gmtime(&time_sec)) == NULL)
1000 goto err;
1001
1002 /*
1003 * Put "genTime_str" in GeneralizedTime format. We work around the
1004 * restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST
1005 * NOT include fractional seconds") and OpenSSL related functions to
1006 * meet the rfc3161 requirement: "GeneralizedTime syntax can include
1007 * fraction-of-second details".
1008 */
1009 p += BIO_snprintf(p, p_end - p,
1010 "%04d%02d%02d%02d%02d%02d",
1011 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
1012 tm->tm_hour, tm->tm_min, tm->tm_sec);
1013 if (precision > 0) {
1014 BIO_snprintf(p, 2 + precision, ".%06ld", usec);
1015 p += strlen(p);
1016
1017 /*
1018 * To make things a bit harder, X.690 | ISO/IEC 8825-1 provides the
1019 * following restrictions for a DER-encoding, which OpenSSL
1020 * (specifically ASN1_GENERALIZEDTIME_check() function) doesn't
1021 * support: "The encoding MUST terminate with a "Z" (which means
1022 * "Zulu" time). The decimal point element, if present, MUST be the
1023 * point option ".". The fractional-seconds elements, if present,
1024 * MUST omit all trailing 0's; if the elements correspond to 0, they
1025 * MUST be wholly omitted, and the decimal point element also MUST be
1026 * omitted."
1027 */
1028 /*
1029 * Remove trailing zeros. The dot guarantees the exit condition of
1030 * this loop even if all the digits are zero.
1031 */
1032 while (*--p == '0')
1033 continue;
1034 if (*p != '.')
1035 ++p;
1036 }
1037 *p++ = 'Z';
1038 *p++ = '\0';
1039
1040 if (asn1_time == NULL
1041 && (asn1_time = ASN1_GENERALIZEDTIME_new()) == NULL)
1042 goto err;
1043 if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str)) {
1044 ASN1_GENERALIZEDTIME_free(asn1_time);
1045 goto err;
1046 }
1047 return asn1_time;
1048
1049 err:
1050 TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME);
1051 return NULL;
1052 }
1053
1054 int TS_RESP_CTX_set_ess_cert_id_digest(TS_RESP_CTX *ctx, const EVP_MD *md)
1055 {
1056 ctx->ess_cert_id_digest = md;
1057 return 1;
1058 }
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