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[thirdparty/openssl.git] / crypto / ts / ts_rsp_sign.c
1 /*
2 * Copyright 2006-2017 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 "e_os.h"
11 #include "internal/cryptlib.h"
12
13 #include <openssl/objects.h>
14 #include <openssl/ts.h>
15 #include <openssl/pkcs7.h>
16 #include "ts_lcl.h"
17
18 static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *, void *);
19 static int def_time_cb(struct TS_resp_ctx *, void *, long *sec, long *usec);
20 static int def_extension_cb(struct TS_resp_ctx *, X509_EXTENSION *, void *);
21
22 static void ts_RESP_CTX_init(TS_RESP_CTX *ctx);
23 static void ts_RESP_CTX_cleanup(TS_RESP_CTX *ctx);
24 static int ts_RESP_check_request(TS_RESP_CTX *ctx);
25 static ASN1_OBJECT *ts_RESP_get_policy(TS_RESP_CTX *ctx);
26 static TS_TST_INFO *ts_RESP_create_tst_info(TS_RESP_CTX *ctx,
27 ASN1_OBJECT *policy);
28 static int ts_RESP_process_extensions(TS_RESP_CTX *ctx);
29 static int ts_RESP_sign(TS_RESP_CTX *ctx);
30
31 static ESS_SIGNING_CERT *ess_SIGNING_CERT_new_init(X509 *signcert,
32 STACK_OF(X509) *certs);
33 static ESS_CERT_ID *ess_CERT_ID_new_init(X509 *cert, int issuer_needed);
34 static int ts_TST_INFO_content_new(PKCS7 *p7);
35 static int ess_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc);
36
37 static ESS_SIGNING_CERT_V2 *ess_signing_cert_v2_new_init(const EVP_MD *hash_alg,
38 X509 *signcert,
39 STACK_OF(X509)
40 *certs);
41 static ESS_CERT_ID_V2 *ess_cert_id_v2_new_init(const EVP_MD *hash_alg,
42 X509 *cert, int issuer_needed);
43 static int ess_add_signing_cert_v2(PKCS7_SIGNER_INFO *si,
44 ESS_SIGNING_CERT_V2 *sc);
45
46 static ASN1_GENERALIZEDTIME
47 *TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *, long, long,
48 unsigned);
49
50 /* Default callback for response generation. */
51 static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *ctx, void *data)
52 {
53 ASN1_INTEGER *serial = ASN1_INTEGER_new();
54
55 if (serial == NULL)
56 goto err;
57 if (!ASN1_INTEGER_set(serial, 1))
58 goto err;
59 return serial;
60
61 err:
62 TSerr(TS_F_DEF_SERIAL_CB, ERR_R_MALLOC_FAILURE);
63 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
64 "Error during serial number generation.");
65 return NULL;
66 }
67
68 #if defined(OPENSSL_SYS_UNIX)
69
70 static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
71 long *sec, long *usec)
72 {
73 struct timeval tv;
74 if (gettimeofday(&tv, NULL) != 0) {
75 TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
76 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
77 "Time is not available.");
78 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
79 return 0;
80 }
81 *sec = tv.tv_sec;
82 *usec = tv.tv_usec;
83
84 return 1;
85 }
86
87 #else
88
89 static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
90 long *sec, long *usec)
91 {
92 time_t t;
93 if (time(&t) == (time_t)-1) {
94 TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
95 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
96 "Time is not available.");
97 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
98 return 0;
99 }
100 *sec = (long)t;
101 *usec = 0;
102
103 return 1;
104 }
105
106 #endif
107
108 static int def_extension_cb(struct TS_resp_ctx *ctx, X509_EXTENSION *ext,
109 void *data)
110 {
111 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
112 "Unsupported extension.");
113 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_EXTENSION);
114 return 0;
115 }
116
117 /* TS_RESP_CTX management functions. */
118
119 TS_RESP_CTX *TS_RESP_CTX_new()
120 {
121 TS_RESP_CTX *ctx;
122
123 if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) {
124 TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE);
125 return NULL;
126 }
127
128 ctx->signer_md = EVP_sha256();
129
130 ctx->serial_cb = def_serial_cb;
131 ctx->time_cb = def_time_cb;
132 ctx->extension_cb = def_extension_cb;
133
134 return ctx;
135 }
136
137 void TS_RESP_CTX_free(TS_RESP_CTX *ctx)
138 {
139 if (!ctx)
140 return;
141
142 X509_free(ctx->signer_cert);
143 EVP_PKEY_free(ctx->signer_key);
144 sk_X509_pop_free(ctx->certs, X509_free);
145 sk_ASN1_OBJECT_pop_free(ctx->policies, ASN1_OBJECT_free);
146 ASN1_OBJECT_free(ctx->default_policy);
147 sk_EVP_MD_free(ctx->mds); /* No EVP_MD_free method exists. */
148 ASN1_INTEGER_free(ctx->seconds);
149 ASN1_INTEGER_free(ctx->millis);
150 ASN1_INTEGER_free(ctx->micros);
151 OPENSSL_free(ctx);
152 }
153
154 int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX *ctx, X509 *signer)
155 {
156 if (X509_check_purpose(signer, X509_PURPOSE_TIMESTAMP_SIGN, 0) != 1) {
157 TSerr(TS_F_TS_RESP_CTX_SET_SIGNER_CERT,
158 TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE);
159 return 0;
160 }
161 X509_free(ctx->signer_cert);
162 ctx->signer_cert = signer;
163 X509_up_ref(ctx->signer_cert);
164 return 1;
165 }
166
167 int TS_RESP_CTX_set_signer_key(TS_RESP_CTX *ctx, EVP_PKEY *key)
168 {
169 EVP_PKEY_free(ctx->signer_key);
170 ctx->signer_key = key;
171 EVP_PKEY_up_ref(ctx->signer_key);
172
173 return 1;
174 }
175
176 int TS_RESP_CTX_set_signer_digest(TS_RESP_CTX *ctx, const EVP_MD *md)
177 {
178 ctx->signer_md = md;
179 return 1;
180 }
181
182 int TS_RESP_CTX_set_def_policy(TS_RESP_CTX *ctx, const ASN1_OBJECT *def_policy)
183 {
184 ASN1_OBJECT_free(ctx->default_policy);
185 if ((ctx->default_policy = OBJ_dup(def_policy)) == NULL)
186 goto err;
187 return 1;
188 err:
189 TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE);
190 return 0;
191 }
192
193 int TS_RESP_CTX_set_certs(TS_RESP_CTX *ctx, STACK_OF(X509) *certs)
194 {
195
196 sk_X509_pop_free(ctx->certs, X509_free);
197 ctx->certs = NULL;
198 if (!certs)
199 return 1;
200 if ((ctx->certs = X509_chain_up_ref(certs)) == NULL) {
201 TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE);
202 return 0;
203 }
204
205 return 1;
206 }
207
208 int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, const ASN1_OBJECT *policy)
209 {
210 ASN1_OBJECT *copy = NULL;
211
212 if (ctx->policies == NULL
213 && (ctx->policies = sk_ASN1_OBJECT_new_null()) == NULL)
214 goto err;
215 if ((copy = OBJ_dup(policy)) == NULL)
216 goto err;
217 if (!sk_ASN1_OBJECT_push(ctx->policies, copy))
218 goto err;
219
220 return 1;
221 err:
222 TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE);
223 ASN1_OBJECT_free(copy);
224 return 0;
225 }
226
227 int TS_RESP_CTX_add_md(TS_RESP_CTX *ctx, const EVP_MD *md)
228 {
229 if (ctx->mds == NULL
230 && (ctx->mds = sk_EVP_MD_new_null()) == NULL)
231 goto err;
232 if (!sk_EVP_MD_push(ctx->mds, md))
233 goto err;
234
235 return 1;
236 err:
237 TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE);
238 return 0;
239 }
240
241 #define TS_RESP_CTX_accuracy_free(ctx) \
242 ASN1_INTEGER_free(ctx->seconds); \
243 ctx->seconds = NULL; \
244 ASN1_INTEGER_free(ctx->millis); \
245 ctx->millis = NULL; \
246 ASN1_INTEGER_free(ctx->micros); \
247 ctx->micros = NULL;
248
249 int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx,
250 int secs, int millis, int micros)
251 {
252
253 TS_RESP_CTX_accuracy_free(ctx);
254 if (secs
255 && ((ctx->seconds = ASN1_INTEGER_new()) == NULL
256 || !ASN1_INTEGER_set(ctx->seconds, secs)))
257 goto err;
258 if (millis
259 && ((ctx->millis = ASN1_INTEGER_new()) == NULL
260 || !ASN1_INTEGER_set(ctx->millis, millis)))
261 goto err;
262 if (micros
263 && ((ctx->micros = ASN1_INTEGER_new()) == NULL
264 || !ASN1_INTEGER_set(ctx->micros, micros)))
265 goto err;
266
267 return 1;
268 err:
269 TS_RESP_CTX_accuracy_free(ctx);
270 TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE);
271 return 0;
272 }
273
274 void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags)
275 {
276 ctx->flags |= flags;
277 }
278
279 void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data)
280 {
281 ctx->serial_cb = cb;
282 ctx->serial_cb_data = data;
283 }
284
285 void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data)
286 {
287 ctx->time_cb = cb;
288 ctx->time_cb_data = data;
289 }
290
291 void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx,
292 TS_extension_cb cb, void *data)
293 {
294 ctx->extension_cb = cb;
295 ctx->extension_cb_data = data;
296 }
297
298 int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx,
299 int status, const char *text)
300 {
301 TS_STATUS_INFO *si = NULL;
302 ASN1_UTF8STRING *utf8_text = NULL;
303 int ret = 0;
304
305 if ((si = TS_STATUS_INFO_new()) == NULL)
306 goto err;
307 if (!ASN1_INTEGER_set(si->status, status))
308 goto err;
309 if (text) {
310 if ((utf8_text = ASN1_UTF8STRING_new()) == NULL
311 || !ASN1_STRING_set(utf8_text, text, strlen(text)))
312 goto err;
313 if (si->text == NULL
314 && (si->text = sk_ASN1_UTF8STRING_new_null()) == NULL)
315 goto err;
316 if (!sk_ASN1_UTF8STRING_push(si->text, utf8_text))
317 goto err;
318 utf8_text = NULL; /* Ownership is lost. */
319 }
320 if (!TS_RESP_set_status_info(ctx->response, si))
321 goto err;
322 ret = 1;
323 err:
324 if (!ret)
325 TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE);
326 TS_STATUS_INFO_free(si);
327 ASN1_UTF8STRING_free(utf8_text);
328 return ret;
329 }
330
331 int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx,
332 int status, const char *text)
333 {
334 int ret = 1;
335 TS_STATUS_INFO *si = ctx->response->status_info;
336
337 if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED) {
338 ret = TS_RESP_CTX_set_status_info(ctx, status, text);
339 }
340 return ret;
341 }
342
343 int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure)
344 {
345 TS_STATUS_INFO *si = ctx->response->status_info;
346 if (si->failure_info == NULL
347 && (si->failure_info = ASN1_BIT_STRING_new()) == NULL)
348 goto err;
349 if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1))
350 goto err;
351 return 1;
352 err:
353 TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE);
354 return 0;
355 }
356
357 TS_REQ *TS_RESP_CTX_get_request(TS_RESP_CTX *ctx)
358 {
359 return ctx->request;
360 }
361
362 TS_TST_INFO *TS_RESP_CTX_get_tst_info(TS_RESP_CTX *ctx)
363 {
364 return ctx->tst_info;
365 }
366
367 int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx,
368 unsigned precision)
369 {
370 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
371 return 0;
372 ctx->clock_precision_digits = precision;
373 return 1;
374 }
375
376 /* Main entry method of the response generation. */
377 TS_RESP *TS_RESP_create_response(TS_RESP_CTX *ctx, BIO *req_bio)
378 {
379 ASN1_OBJECT *policy;
380 TS_RESP *response;
381 int result = 0;
382
383 ts_RESP_CTX_init(ctx);
384
385 if ((ctx->response = TS_RESP_new()) == NULL) {
386 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE);
387 goto end;
388 }
389 if ((ctx->request = d2i_TS_REQ_bio(req_bio, NULL)) == NULL) {
390 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
391 "Bad request format or system error.");
392 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
393 goto end;
394 }
395 if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL))
396 goto end;
397 if (!ts_RESP_check_request(ctx))
398 goto end;
399 if ((policy = ts_RESP_get_policy(ctx)) == NULL)
400 goto end;
401 if ((ctx->tst_info = ts_RESP_create_tst_info(ctx, policy)) == NULL)
402 goto end;
403 if (!ts_RESP_process_extensions(ctx))
404 goto end;
405 if (!ts_RESP_sign(ctx))
406 goto end;
407 result = 1;
408
409 end:
410 if (!result) {
411 TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR);
412 if (ctx->response != NULL) {
413 if (TS_RESP_CTX_set_status_info_cond(ctx,
414 TS_STATUS_REJECTION,
415 "Error during response "
416 "generation.") == 0) {
417 TS_RESP_free(ctx->response);
418 ctx->response = NULL;
419 }
420 }
421 }
422 response = ctx->response;
423 ctx->response = NULL; /* Ownership will be returned to caller. */
424 ts_RESP_CTX_cleanup(ctx);
425 return response;
426 }
427
428 /* Initializes the variable part of the context. */
429 static void ts_RESP_CTX_init(TS_RESP_CTX *ctx)
430 {
431 ctx->request = NULL;
432 ctx->response = NULL;
433 ctx->tst_info = NULL;
434 }
435
436 /* Cleans up the variable part of the context. */
437 static void ts_RESP_CTX_cleanup(TS_RESP_CTX *ctx)
438 {
439 TS_REQ_free(ctx->request);
440 ctx->request = NULL;
441 TS_RESP_free(ctx->response);
442 ctx->response = NULL;
443 TS_TST_INFO_free(ctx->tst_info);
444 ctx->tst_info = NULL;
445 }
446
447 /* Checks the format and content of the request. */
448 static int ts_RESP_check_request(TS_RESP_CTX *ctx)
449 {
450 TS_REQ *request = ctx->request;
451 TS_MSG_IMPRINT *msg_imprint;
452 X509_ALGOR *md_alg;
453 int md_alg_id;
454 const ASN1_OCTET_STRING *digest;
455 const EVP_MD *md = NULL;
456 int i;
457
458 if (TS_REQ_get_version(request) != 1) {
459 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
460 "Bad request version.");
461 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_REQUEST);
462 return 0;
463 }
464
465 msg_imprint = request->msg_imprint;
466 md_alg = msg_imprint->hash_algo;
467 md_alg_id = OBJ_obj2nid(md_alg->algorithm);
468 for (i = 0; !md && i < sk_EVP_MD_num(ctx->mds); ++i) {
469 const EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i);
470 if (md_alg_id == EVP_MD_type(current_md))
471 md = current_md;
472 }
473 if (!md) {
474 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
475 "Message digest algorithm is "
476 "not supported.");
477 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
478 return 0;
479 }
480
481 if (md_alg->parameter && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL) {
482 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
483 "Superfluous message digest "
484 "parameter.");
485 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG);
486 return 0;
487 }
488 digest = msg_imprint->hashed_msg;
489 if (digest->length != EVP_MD_size(md)) {
490 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
491 "Bad message digest.");
492 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT);
493 return 0;
494 }
495
496 return 1;
497 }
498
499 /* Returns the TSA policy based on the requested and acceptable policies. */
500 static ASN1_OBJECT *ts_RESP_get_policy(TS_RESP_CTX *ctx)
501 {
502 ASN1_OBJECT *requested = ctx->request->policy_id;
503 ASN1_OBJECT *policy = NULL;
504 int i;
505
506 if (ctx->default_policy == NULL) {
507 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER);
508 return NULL;
509 }
510 if (!requested || !OBJ_cmp(requested, ctx->default_policy))
511 policy = ctx->default_policy;
512
513 /* Check if the policy is acceptable. */
514 for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i) {
515 ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i);
516 if (!OBJ_cmp(requested, current))
517 policy = current;
518 }
519 if (!policy) {
520 TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY);
521 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
522 "Requested policy is not " "supported.");
523 TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY);
524 }
525 return policy;
526 }
527
528 /* Creates the TS_TST_INFO object based on the settings of the context. */
529 static TS_TST_INFO *ts_RESP_create_tst_info(TS_RESP_CTX *ctx,
530 ASN1_OBJECT *policy)
531 {
532 int result = 0;
533 TS_TST_INFO *tst_info = NULL;
534 ASN1_INTEGER *serial = NULL;
535 ASN1_GENERALIZEDTIME *asn1_time = NULL;
536 long sec, usec;
537 TS_ACCURACY *accuracy = NULL;
538 const ASN1_INTEGER *nonce;
539 GENERAL_NAME *tsa_name = NULL;
540
541 if ((tst_info = TS_TST_INFO_new()) == NULL)
542 goto end;
543 if (!TS_TST_INFO_set_version(tst_info, 1))
544 goto end;
545 if (!TS_TST_INFO_set_policy_id(tst_info, policy))
546 goto end;
547 if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint))
548 goto end;
549 if ((serial = ctx->serial_cb(ctx, ctx->serial_cb_data)) == NULL
550 || !TS_TST_INFO_set_serial(tst_info, serial))
551 goto end;
552 if (!ctx->time_cb(ctx, ctx->time_cb_data, &sec, &usec)
553 || (asn1_time =
554 TS_RESP_set_genTime_with_precision(NULL, sec, usec,
555 ctx->clock_precision_digits)) == NULL
556 || !TS_TST_INFO_set_time(tst_info, asn1_time))
557 goto end;
558
559 if ((ctx->seconds || ctx->millis || ctx->micros)
560 && (accuracy = TS_ACCURACY_new()) == NULL)
561 goto end;
562 if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds))
563 goto end;
564 if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis))
565 goto end;
566 if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros))
567 goto end;
568 if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy))
569 goto end;
570
571 if ((ctx->flags & TS_ORDERING)
572 && !TS_TST_INFO_set_ordering(tst_info, 1))
573 goto end;
574
575 if ((nonce = ctx->request->nonce) != NULL
576 && !TS_TST_INFO_set_nonce(tst_info, nonce))
577 goto end;
578
579 if (ctx->flags & TS_TSA_NAME) {
580 if ((tsa_name = GENERAL_NAME_new()) == NULL)
581 goto end;
582 tsa_name->type = GEN_DIRNAME;
583 tsa_name->d.dirn =
584 X509_NAME_dup(X509_get_subject_name(ctx->signer_cert));
585 if (!tsa_name->d.dirn)
586 goto end;
587 if (!TS_TST_INFO_set_tsa(tst_info, tsa_name))
588 goto end;
589 }
590
591 result = 1;
592 end:
593 if (!result) {
594 TS_TST_INFO_free(tst_info);
595 tst_info = NULL;
596 TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR);
597 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
598 "Error during TSTInfo "
599 "generation.");
600 }
601 GENERAL_NAME_free(tsa_name);
602 TS_ACCURACY_free(accuracy);
603 ASN1_GENERALIZEDTIME_free(asn1_time);
604 ASN1_INTEGER_free(serial);
605
606 return tst_info;
607 }
608
609 /* Processing the extensions of the request. */
610 static int ts_RESP_process_extensions(TS_RESP_CTX *ctx)
611 {
612 STACK_OF(X509_EXTENSION) *exts = ctx->request->extensions;
613 int i;
614 int ok = 1;
615
616 for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i) {
617 X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
618 /*
619 * The last argument was previously (void *)ctx->extension_cb,
620 * but ISO C doesn't permit converting a function pointer to void *.
621 * For lack of better information, I'm placing a NULL there instead.
622 * The callback can pick its own address out from the ctx anyway...
623 */
624 ok = (*ctx->extension_cb) (ctx, ext, NULL);
625 }
626
627 return ok;
628 }
629
630 /* Functions for signing the TS_TST_INFO structure of the context. */
631 static int ts_RESP_sign(TS_RESP_CTX *ctx)
632 {
633 int ret = 0;
634 PKCS7 *p7 = NULL;
635 PKCS7_SIGNER_INFO *si;
636 STACK_OF(X509) *certs; /* Certificates to include in sc. */
637 ESS_SIGNING_CERT_V2 *sc2 = NULL;
638 ESS_SIGNING_CERT *sc = NULL;
639 ASN1_OBJECT *oid;
640 BIO *p7bio = NULL;
641 int i;
642
643 if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) {
644 TSerr(TS_F_TS_RESP_SIGN, TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
645 goto err;
646 }
647
648 if ((p7 = PKCS7_new()) == NULL) {
649 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
650 goto err;
651 }
652 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
653 goto err;
654 if (!ASN1_INTEGER_set(p7->d.sign->version, 3))
655 goto err;
656
657 if (ctx->request->cert_req) {
658 PKCS7_add_certificate(p7, ctx->signer_cert);
659 if (ctx->certs) {
660 for (i = 0; i < sk_X509_num(ctx->certs); ++i) {
661 X509 *cert = sk_X509_value(ctx->certs, i);
662 PKCS7_add_certificate(p7, cert);
663 }
664 }
665 }
666
667 if ((si = PKCS7_add_signature(p7, ctx->signer_cert,
668 ctx->signer_key, ctx->signer_md)) == NULL) {
669 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR);
670 goto err;
671 }
672
673 oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
674 if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
675 V_ASN1_OBJECT, oid)) {
676 TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR);
677 goto err;
678 }
679
680 certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL;
681 if (ctx->ess_cert_id_digest == NULL
682 || ctx->ess_cert_id_digest == EVP_sha1()) {
683 if ((sc = ess_SIGNING_CERT_new_init(ctx->signer_cert, certs)) == NULL)
684 goto err;
685
686 if (!ess_add_signing_cert(si, sc)) {
687 TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR);
688 goto err;
689 }
690 } else {
691 sc2 = ess_signing_cert_v2_new_init(ctx->ess_cert_id_digest,
692 ctx->signer_cert, certs);
693 if (sc2 == NULL)
694 goto err;
695
696 if (!ess_add_signing_cert_v2(si, sc2)) {
697 TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_V2_ERROR);
698 goto err;
699 }
700 }
701
702 if (!ts_TST_INFO_content_new(p7))
703 goto err;
704 if ((p7bio = PKCS7_dataInit(p7, NULL)) == NULL) {
705 TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE);
706 goto err;
707 }
708 if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info)) {
709 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
710 goto err;
711 }
712 if (!PKCS7_dataFinal(p7, p7bio)) {
713 TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN);
714 goto err;
715 }
716 TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info);
717 p7 = NULL; /* Ownership is lost. */
718 ctx->tst_info = NULL; /* Ownership is lost. */
719
720 ret = 1;
721 err:
722 if (!ret)
723 TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION,
724 "Error during signature "
725 "generation.");
726 BIO_free_all(p7bio);
727 ESS_SIGNING_CERT_V2_free(sc2);
728 ESS_SIGNING_CERT_free(sc);
729 PKCS7_free(p7);
730 return ret;
731 }
732
733 static ESS_SIGNING_CERT *ess_SIGNING_CERT_new_init(X509 *signcert,
734 STACK_OF(X509) *certs)
735 {
736 ESS_CERT_ID *cid;
737 ESS_SIGNING_CERT *sc = NULL;
738 int i;
739
740 if ((sc = ESS_SIGNING_CERT_new()) == NULL)
741 goto err;
742 if (sc->cert_ids == NULL
743 && (sc->cert_ids = sk_ESS_CERT_ID_new_null()) == NULL)
744 goto err;
745
746 if ((cid = ess_CERT_ID_new_init(signcert, 0)) == NULL
747 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
748 goto err;
749 for (i = 0; i < sk_X509_num(certs); ++i) {
750 X509 *cert = sk_X509_value(certs, i);
751 if ((cid = ess_CERT_ID_new_init(cert, 1)) == NULL
752 || !sk_ESS_CERT_ID_push(sc->cert_ids, cid))
753 goto err;
754 }
755
756 return sc;
757 err:
758 ESS_SIGNING_CERT_free(sc);
759 TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE);
760 return NULL;
761 }
762
763 static ESS_CERT_ID *ess_CERT_ID_new_init(X509 *cert, int issuer_needed)
764 {
765 ESS_CERT_ID *cid = NULL;
766 GENERAL_NAME *name = NULL;
767 unsigned char cert_sha1[SHA_DIGEST_LENGTH];
768
769 /* Call for side-effect of computing hash and caching extensions */
770 X509_check_purpose(cert, -1, 0);
771 if ((cid = ESS_CERT_ID_new()) == NULL)
772 goto err;
773 X509_digest(cert, EVP_sha1(), cert_sha1, NULL);
774 if (!ASN1_OCTET_STRING_set(cid->hash, cert_sha1, SHA_DIGEST_LENGTH))
775 goto err;
776
777 /* Setting the issuer/serial if requested. */
778 if (issuer_needed) {
779 if (cid->issuer_serial == NULL
780 && (cid->issuer_serial = ESS_ISSUER_SERIAL_new()) == NULL)
781 goto err;
782 if ((name = GENERAL_NAME_new()) == NULL)
783 goto err;
784 name->type = GEN_DIRNAME;
785 if ((name->d.dirn = X509_NAME_dup(X509_get_issuer_name(cert))) == NULL)
786 goto err;
787 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
788 goto err;
789 name = NULL; /* Ownership is lost. */
790 ASN1_INTEGER_free(cid->issuer_serial->serial);
791 if (!(cid->issuer_serial->serial =
792 ASN1_INTEGER_dup(X509_get_serialNumber(cert))))
793 goto err;
794 }
795
796 return cid;
797 err:
798 GENERAL_NAME_free(name);
799 ESS_CERT_ID_free(cid);
800 TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE);
801 return NULL;
802 }
803
804 static int ts_TST_INFO_content_new(PKCS7 *p7)
805 {
806 PKCS7 *ret = NULL;
807 ASN1_OCTET_STRING *octet_string = NULL;
808
809 /* Create new encapsulated NID_id_smime_ct_TSTInfo content. */
810 if ((ret = PKCS7_new()) == NULL)
811 goto err;
812 if ((ret->d.other = ASN1_TYPE_new()) == NULL)
813 goto err;
814 ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
815 if ((octet_string = ASN1_OCTET_STRING_new()) == NULL)
816 goto err;
817 ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string);
818 octet_string = NULL;
819
820 /* Add encapsulated content to signed PKCS7 structure. */
821 if (!PKCS7_set_content(p7, ret))
822 goto err;
823
824 return 1;
825 err:
826 ASN1_OCTET_STRING_free(octet_string);
827 PKCS7_free(ret);
828 return 0;
829 }
830
831 static int ess_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc)
832 {
833 ASN1_STRING *seq = NULL;
834 unsigned char *p, *pp = NULL;
835 int len;
836
837 len = i2d_ESS_SIGNING_CERT(sc, NULL);
838 if ((pp = OPENSSL_malloc(len)) == NULL) {
839 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
840 goto err;
841 }
842 p = pp;
843 i2d_ESS_SIGNING_CERT(sc, &p);
844 if ((seq = ASN1_STRING_new()) == NULL || !ASN1_STRING_set(seq, pp, len)) {
845 TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE);
846 goto err;
847 }
848 OPENSSL_free(pp);
849 pp = NULL;
850 return PKCS7_add_signed_attribute(si,
851 NID_id_smime_aa_signingCertificate,
852 V_ASN1_SEQUENCE, seq);
853 err:
854 ASN1_STRING_free(seq);
855 OPENSSL_free(pp);
856
857 return 0;
858 }
859
860 static ESS_SIGNING_CERT_V2 *ess_signing_cert_v2_new_init(const EVP_MD *hash_alg,
861 X509 *signcert,
862 STACK_OF(X509) *certs)
863 {
864 ESS_CERT_ID_V2 *cid = NULL;
865 ESS_SIGNING_CERT_V2 *sc = NULL;
866 int i;
867
868 if ((sc = ESS_SIGNING_CERT_V2_new()) == NULL)
869 goto err;
870 if ((cid = ess_cert_id_v2_new_init(hash_alg, signcert, 0)) == NULL)
871 goto err;
872 if (!sk_ESS_CERT_ID_V2_push(sc->cert_ids, cid))
873 goto err;
874 cid = NULL;
875
876 for (i = 0; i < sk_X509_num(certs); ++i) {
877 X509 *cert = sk_X509_value(certs, i);
878
879 if ((cid = ess_cert_id_v2_new_init(hash_alg, cert, 1)) == NULL)
880 goto err;
881 if (!sk_ESS_CERT_ID_V2_push(sc->cert_ids, cid))
882 goto err;
883 cid = NULL;
884 }
885
886 return sc;
887 err:
888 ESS_SIGNING_CERT_V2_free(sc);
889 ESS_CERT_ID_V2_free(cid);
890 TSerr(TS_F_ESS_SIGNING_CERT_V2_NEW_INIT, ERR_R_MALLOC_FAILURE);
891 return NULL;
892 }
893
894 static ESS_CERT_ID_V2 *ess_cert_id_v2_new_init(const EVP_MD *hash_alg,
895 X509 *cert, int issuer_needed)
896 {
897 ESS_CERT_ID_V2 *cid = NULL;
898 GENERAL_NAME *name = NULL;
899 unsigned char hash[EVP_MAX_MD_SIZE];
900 unsigned int hash_len = sizeof(hash);
901 X509_ALGOR *alg = NULL;
902
903 memset(hash, 0, sizeof(hash));
904
905 if ((cid = ESS_CERT_ID_V2_new()) == NULL)
906 goto err;
907
908 if (hash_alg != EVP_sha256()) {
909 alg = X509_ALGOR_new();
910 if (alg == NULL)
911 goto err;
912 X509_ALGOR_set_md(alg, hash_alg);
913 if (alg->algorithm == NULL)
914 goto err;
915 cid->hash_alg = alg;
916 alg = NULL;
917 } else {
918 cid->hash_alg = NULL;
919 }
920
921 if (!X509_digest(cert, hash_alg, hash, &hash_len))
922 goto err;
923
924 if (!ASN1_OCTET_STRING_set(cid->hash, hash, hash_len))
925 goto err;
926
927 if (issuer_needed) {
928 if ((cid->issuer_serial = ESS_ISSUER_SERIAL_new()) == NULL)
929 goto err;
930 if ((name = GENERAL_NAME_new()) == NULL)
931 goto err;
932 name->type = GEN_DIRNAME;
933 if ((name->d.dirn = X509_NAME_dup(X509_get_issuer_name(cert))) == NULL)
934 goto err;
935 if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name))
936 goto err;
937 name = NULL; /* Ownership is lost. */
938 ASN1_INTEGER_free(cid->issuer_serial->serial);
939 cid->issuer_serial->serial =
940 ASN1_INTEGER_dup(X509_get_serialNumber(cert));
941 if (cid->issuer_serial->serial == NULL)
942 goto err;
943 }
944
945 return cid;
946 err:
947 X509_ALGOR_free(alg);
948 GENERAL_NAME_free(name);
949 ESS_CERT_ID_V2_free(cid);
950 TSerr(TS_F_ESS_CERT_ID_V2_NEW_INIT, ERR_R_MALLOC_FAILURE);
951 return NULL;
952 }
953
954 static int ess_add_signing_cert_v2(PKCS7_SIGNER_INFO *si,
955 ESS_SIGNING_CERT_V2 *sc)
956 {
957 ASN1_STRING *seq = NULL;
958 unsigned char *p, *pp = NULL;
959 int len = i2d_ESS_SIGNING_CERT_V2(sc, NULL);
960
961 if ((pp = OPENSSL_malloc(len)) == NULL) {
962 TSerr(TS_F_ESS_ADD_SIGNING_CERT_V2, ERR_R_MALLOC_FAILURE);
963 goto err;
964 }
965
966 p = pp;
967 i2d_ESS_SIGNING_CERT_V2(sc, &p);
968 if ((seq = ASN1_STRING_new()) == NULL || !ASN1_STRING_set(seq, pp, len)) {
969 TSerr(TS_F_ESS_ADD_SIGNING_CERT_V2, ERR_R_MALLOC_FAILURE);
970 goto err;
971 }
972
973 OPENSSL_free(pp);
974 pp = NULL;
975 return PKCS7_add_signed_attribute(si,
976 NID_id_smime_aa_signingCertificateV2,
977 V_ASN1_SEQUENCE, seq);
978 err:
979 ASN1_STRING_free(seq);
980 OPENSSL_free(pp);
981 return 0;
982 }
983
984 static ASN1_GENERALIZEDTIME *TS_RESP_set_genTime_with_precision(
985 ASN1_GENERALIZEDTIME *asn1_time, long sec, long usec,
986 unsigned precision)
987 {
988 time_t time_sec = (time_t)sec;
989 struct tm *tm = NULL;
990 char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS];
991 char *p = genTime_str;
992 char *p_end = genTime_str + sizeof(genTime_str);
993
994 if (precision > TS_MAX_CLOCK_PRECISION_DIGITS)
995 goto err;
996
997 if ((tm = gmtime(&time_sec)) == NULL)
998 goto err;
999
1000 /*
1001 * Put "genTime_str" in GeneralizedTime format. We work around the
1002 * restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST
1003 * NOT include fractional seconds") and OpenSSL related functions to
1004 * meet the rfc3161 requirement: "GeneralizedTime syntax can include
1005 * fraction-of-second details".
1006 */
1007 p += BIO_snprintf(p, p_end - p,
1008 "%04d%02d%02d%02d%02d%02d",
1009 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
1010 tm->tm_hour, tm->tm_min, tm->tm_sec);
1011 if (precision > 0) {
1012 BIO_snprintf(p, 2 + precision, ".%06ld", usec);
1013 p += strlen(p);
1014
1015 /*
1016 * To make things a bit harder, X.690 | ISO/IEC 8825-1 provides the
1017 * following restrictions for a DER-encoding, which OpenSSL
1018 * (specifically ASN1_GENERALIZEDTIME_check() function) doesn't
1019 * support: "The encoding MUST terminate with a "Z" (which means
1020 * "Zulu" time). The decimal point element, if present, MUST be the
1021 * point option ".". The fractional-seconds elements, if present,
1022 * MUST omit all trailing 0's; if the elements correspond to 0, they
1023 * MUST be wholly omitted, and the decimal point element also MUST be
1024 * omitted."
1025 */
1026 /*
1027 * Remove trailing zeros. The dot guarantees the exit condition of
1028 * this loop even if all the digits are zero.
1029 */
1030 while (*--p == '0')
1031 continue;
1032 if (*p != '.')
1033 ++p;
1034 }
1035 *p++ = 'Z';
1036 *p++ = '\0';
1037
1038 if (asn1_time == NULL
1039 && (asn1_time = ASN1_GENERALIZEDTIME_new()) == NULL)
1040 goto err;
1041 if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str)) {
1042 ASN1_GENERALIZEDTIME_free(asn1_time);
1043 goto err;
1044 }
1045 return asn1_time;
1046
1047 err:
1048 TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME);
1049 return NULL;
1050 }
1051
1052 int TS_RESP_CTX_set_ess_cert_id_digest(TS_RESP_CTX *ctx, const EVP_MD *md)
1053 {
1054 ctx->ess_cert_id_digest = md;
1055 return 1;
1056 }
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