1 | /* |
2 | * Copyright 2006-2019 The OpenSSL Project Authors. All Rights Reserved. |
3 | * |
4 | * Licensed under the Apache License 2.0 (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 <openssl/crypto.h> |
17 | #include "ts_local.h" |
18 | #include "crypto/ess.h" |
19 | |
20 | static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *, void *); |
21 | static int def_time_cb(struct TS_resp_ctx *, void *, long *sec, long *usec); |
22 | static int def_extension_cb(struct TS_resp_ctx *, X509_EXTENSION *, void *); |
23 | |
24 | static void ts_RESP_CTX_init(TS_RESP_CTX *ctx); |
25 | static void ts_RESP_CTX_cleanup(TS_RESP_CTX *ctx); |
26 | static int ts_RESP_check_request(TS_RESP_CTX *ctx); |
27 | static ASN1_OBJECT *ts_RESP_get_policy(TS_RESP_CTX *ctx); |
28 | static TS_TST_INFO *ts_RESP_create_tst_info(TS_RESP_CTX *ctx, |
29 | ASN1_OBJECT *policy); |
30 | static int ts_RESP_process_extensions(TS_RESP_CTX *ctx); |
31 | static int ts_RESP_sign(TS_RESP_CTX *ctx); |
32 | |
33 | static int ts_TST_INFO_content_new(PKCS7 *p7); |
34 | |
35 | static ASN1_GENERALIZEDTIME |
36 | *TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *, long, long, |
37 | unsigned); |
38 | |
39 | /* Default callback for response generation. */ |
40 | static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *ctx, void *data) |
41 | { |
42 | ASN1_INTEGER *serial = ASN1_INTEGER_new(); |
43 | |
44 | if (serial == NULL) |
45 | goto err; |
46 | if (!ASN1_INTEGER_set(serial, 1)) |
47 | goto err; |
48 | return serial; |
49 | |
50 | err: |
51 | TSerr(TS_F_DEF_SERIAL_CB, ERR_R_MALLOC_FAILURE); |
52 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
53 | "Error during serial number generation." ); |
54 | return NULL; |
55 | } |
56 | |
57 | #if defined(OPENSSL_SYS_UNIX) |
58 | |
59 | static int def_time_cb(struct TS_resp_ctx *ctx, void *data, |
60 | long *sec, long *usec) |
61 | { |
62 | struct timeval tv; |
63 | if (gettimeofday(&tv, NULL) != 0) { |
64 | TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR); |
65 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
66 | "Time is not available." ); |
67 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE); |
68 | return 0; |
69 | } |
70 | *sec = tv.tv_sec; |
71 | *usec = tv.tv_usec; |
72 | |
73 | return 1; |
74 | } |
75 | |
76 | #else |
77 | |
78 | static int def_time_cb(struct TS_resp_ctx *ctx, void *data, |
79 | long *sec, long *usec) |
80 | { |
81 | time_t t; |
82 | if (time(&t) == (time_t)-1) { |
83 | TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR); |
84 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
85 | "Time is not available." ); |
86 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE); |
87 | return 0; |
88 | } |
89 | *sec = (long)t; |
90 | *usec = 0; |
91 | |
92 | return 1; |
93 | } |
94 | |
95 | #endif |
96 | |
97 | static int def_extension_cb(struct TS_resp_ctx *ctx, X509_EXTENSION *ext, |
98 | void *data) |
99 | { |
100 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
101 | "Unsupported extension." ); |
102 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_EXTENSION); |
103 | return 0; |
104 | } |
105 | |
106 | /* TS_RESP_CTX management functions. */ |
107 | |
108 | TS_RESP_CTX *TS_RESP_CTX_new(void) |
109 | { |
110 | TS_RESP_CTX *ctx; |
111 | |
112 | if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) { |
113 | TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE); |
114 | return NULL; |
115 | } |
116 | |
117 | ctx->signer_md = EVP_sha256(); |
118 | |
119 | ctx->serial_cb = def_serial_cb; |
120 | ctx->time_cb = def_time_cb; |
121 | ctx->extension_cb = def_extension_cb; |
122 | |
123 | return ctx; |
124 | } |
125 | |
126 | void TS_RESP_CTX_free(TS_RESP_CTX *ctx) |
127 | { |
128 | if (!ctx) |
129 | return; |
130 | |
131 | X509_free(ctx->signer_cert); |
132 | EVP_PKEY_free(ctx->signer_key); |
133 | sk_X509_pop_free(ctx->certs, X509_free); |
134 | sk_ASN1_OBJECT_pop_free(ctx->policies, ASN1_OBJECT_free); |
135 | ASN1_OBJECT_free(ctx->default_policy); |
136 | sk_EVP_MD_free(ctx->mds); /* No EVP_MD_free method exists. */ |
137 | ASN1_INTEGER_free(ctx->seconds); |
138 | ASN1_INTEGER_free(ctx->millis); |
139 | ASN1_INTEGER_free(ctx->micros); |
140 | OPENSSL_free(ctx); |
141 | } |
142 | |
143 | int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX *ctx, X509 *signer) |
144 | { |
145 | if (X509_check_purpose(signer, X509_PURPOSE_TIMESTAMP_SIGN, 0) != 1) { |
146 | TSerr(TS_F_TS_RESP_CTX_SET_SIGNER_CERT, |
147 | TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE); |
148 | return 0; |
149 | } |
150 | X509_free(ctx->signer_cert); |
151 | ctx->signer_cert = signer; |
152 | X509_up_ref(ctx->signer_cert); |
153 | return 1; |
154 | } |
155 | |
156 | int TS_RESP_CTX_set_signer_key(TS_RESP_CTX *ctx, EVP_PKEY *key) |
157 | { |
158 | EVP_PKEY_free(ctx->signer_key); |
159 | ctx->signer_key = key; |
160 | EVP_PKEY_up_ref(ctx->signer_key); |
161 | |
162 | return 1; |
163 | } |
164 | |
165 | int TS_RESP_CTX_set_signer_digest(TS_RESP_CTX *ctx, const EVP_MD *md) |
166 | { |
167 | ctx->signer_md = md; |
168 | return 1; |
169 | } |
170 | |
171 | int TS_RESP_CTX_set_def_policy(TS_RESP_CTX *ctx, const ASN1_OBJECT *def_policy) |
172 | { |
173 | ASN1_OBJECT_free(ctx->default_policy); |
174 | if ((ctx->default_policy = OBJ_dup(def_policy)) == NULL) |
175 | goto err; |
176 | return 1; |
177 | err: |
178 | TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE); |
179 | return 0; |
180 | } |
181 | |
182 | int TS_RESP_CTX_set_certs(TS_RESP_CTX *ctx, STACK_OF(X509) *certs) |
183 | { |
184 | |
185 | sk_X509_pop_free(ctx->certs, X509_free); |
186 | ctx->certs = NULL; |
187 | if (!certs) |
188 | return 1; |
189 | if ((ctx->certs = X509_chain_up_ref(certs)) == NULL) { |
190 | TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE); |
191 | return 0; |
192 | } |
193 | |
194 | return 1; |
195 | } |
196 | |
197 | int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, const ASN1_OBJECT *policy) |
198 | { |
199 | ASN1_OBJECT *copy = NULL; |
200 | |
201 | if (ctx->policies == NULL |
202 | && (ctx->policies = sk_ASN1_OBJECT_new_null()) == NULL) |
203 | goto err; |
204 | if ((copy = OBJ_dup(policy)) == NULL) |
205 | goto err; |
206 | if (!sk_ASN1_OBJECT_push(ctx->policies, copy)) |
207 | goto err; |
208 | |
209 | return 1; |
210 | err: |
211 | TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE); |
212 | ASN1_OBJECT_free(copy); |
213 | return 0; |
214 | } |
215 | |
216 | int TS_RESP_CTX_add_md(TS_RESP_CTX *ctx, const EVP_MD *md) |
217 | { |
218 | if (ctx->mds == NULL |
219 | && (ctx->mds = sk_EVP_MD_new_null()) == NULL) |
220 | goto err; |
221 | if (!sk_EVP_MD_push(ctx->mds, md)) |
222 | goto err; |
223 | |
224 | return 1; |
225 | err: |
226 | TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE); |
227 | return 0; |
228 | } |
229 | |
230 | #define TS_RESP_CTX_accuracy_free(ctx) \ |
231 | ASN1_INTEGER_free(ctx->seconds); \ |
232 | ctx->seconds = NULL; \ |
233 | ASN1_INTEGER_free(ctx->millis); \ |
234 | ctx->millis = NULL; \ |
235 | ASN1_INTEGER_free(ctx->micros); \ |
236 | ctx->micros = NULL; |
237 | |
238 | int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx, |
239 | int secs, int millis, int micros) |
240 | { |
241 | |
242 | TS_RESP_CTX_accuracy_free(ctx); |
243 | if (secs |
244 | && ((ctx->seconds = ASN1_INTEGER_new()) == NULL |
245 | || !ASN1_INTEGER_set(ctx->seconds, secs))) |
246 | goto err; |
247 | if (millis |
248 | && ((ctx->millis = ASN1_INTEGER_new()) == NULL |
249 | || !ASN1_INTEGER_set(ctx->millis, millis))) |
250 | goto err; |
251 | if (micros |
252 | && ((ctx->micros = ASN1_INTEGER_new()) == NULL |
253 | || !ASN1_INTEGER_set(ctx->micros, micros))) |
254 | goto err; |
255 | |
256 | return 1; |
257 | err: |
258 | TS_RESP_CTX_accuracy_free(ctx); |
259 | TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE); |
260 | return 0; |
261 | } |
262 | |
263 | void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags) |
264 | { |
265 | ctx->flags |= flags; |
266 | } |
267 | |
268 | void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data) |
269 | { |
270 | ctx->serial_cb = cb; |
271 | ctx->serial_cb_data = data; |
272 | } |
273 | |
274 | void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data) |
275 | { |
276 | ctx->time_cb = cb; |
277 | ctx->time_cb_data = data; |
278 | } |
279 | |
280 | void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx, |
281 | TS_extension_cb cb, void *data) |
282 | { |
283 | ctx->extension_cb = cb; |
284 | ctx->extension_cb_data = data; |
285 | } |
286 | |
287 | int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx, |
288 | int status, const char *text) |
289 | { |
290 | TS_STATUS_INFO *si = NULL; |
291 | ASN1_UTF8STRING *utf8_text = NULL; |
292 | int ret = 0; |
293 | |
294 | if ((si = TS_STATUS_INFO_new()) == NULL) |
295 | goto err; |
296 | if (!ASN1_INTEGER_set(si->status, status)) |
297 | goto err; |
298 | if (text) { |
299 | if ((utf8_text = ASN1_UTF8STRING_new()) == NULL |
300 | || !ASN1_STRING_set(utf8_text, text, strlen(text))) |
301 | goto err; |
302 | if (si->text == NULL |
303 | && (si->text = sk_ASN1_UTF8STRING_new_null()) == NULL) |
304 | goto err; |
305 | if (!sk_ASN1_UTF8STRING_push(si->text, utf8_text)) |
306 | goto err; |
307 | utf8_text = NULL; /* Ownership is lost. */ |
308 | } |
309 | if (!TS_RESP_set_status_info(ctx->response, si)) |
310 | goto err; |
311 | ret = 1; |
312 | err: |
313 | if (!ret) |
314 | TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE); |
315 | TS_STATUS_INFO_free(si); |
316 | ASN1_UTF8STRING_free(utf8_text); |
317 | return ret; |
318 | } |
319 | |
320 | int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx, |
321 | int status, const char *text) |
322 | { |
323 | int ret = 1; |
324 | TS_STATUS_INFO *si = ctx->response->status_info; |
325 | |
326 | if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED) { |
327 | ret = TS_RESP_CTX_set_status_info(ctx, status, text); |
328 | } |
329 | return ret; |
330 | } |
331 | |
332 | int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure) |
333 | { |
334 | TS_STATUS_INFO *si = ctx->response->status_info; |
335 | if (si->failure_info == NULL |
336 | && (si->failure_info = ASN1_BIT_STRING_new()) == NULL) |
337 | goto err; |
338 | if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1)) |
339 | goto err; |
340 | return 1; |
341 | err: |
342 | TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE); |
343 | return 0; |
344 | } |
345 | |
346 | TS_REQ *TS_RESP_CTX_get_request(TS_RESP_CTX *ctx) |
347 | { |
348 | return ctx->request; |
349 | } |
350 | |
351 | TS_TST_INFO *TS_RESP_CTX_get_tst_info(TS_RESP_CTX *ctx) |
352 | { |
353 | return ctx->tst_info; |
354 | } |
355 | |
356 | int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx, |
357 | unsigned precision) |
358 | { |
359 | if (precision > TS_MAX_CLOCK_PRECISION_DIGITS) |
360 | return 0; |
361 | ctx->clock_precision_digits = precision; |
362 | return 1; |
363 | } |
364 | |
365 | /* Main entry method of the response generation. */ |
366 | TS_RESP *TS_RESP_create_response(TS_RESP_CTX *ctx, BIO *req_bio) |
367 | { |
368 | ASN1_OBJECT *policy; |
369 | TS_RESP *response; |
370 | int result = 0; |
371 | |
372 | ts_RESP_CTX_init(ctx); |
373 | |
374 | if ((ctx->response = TS_RESP_new()) == NULL) { |
375 | TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE); |
376 | goto end; |
377 | } |
378 | if ((ctx->request = d2i_TS_REQ_bio(req_bio, NULL)) == NULL) { |
379 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
380 | "Bad request format or system error." ); |
381 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT); |
382 | goto end; |
383 | } |
384 | if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL)) |
385 | goto end; |
386 | if (!ts_RESP_check_request(ctx)) |
387 | goto end; |
388 | if ((policy = ts_RESP_get_policy(ctx)) == NULL) |
389 | goto end; |
390 | if ((ctx->tst_info = ts_RESP_create_tst_info(ctx, policy)) == NULL) |
391 | goto end; |
392 | if (!ts_RESP_process_extensions(ctx)) |
393 | goto end; |
394 | if (!ts_RESP_sign(ctx)) |
395 | goto end; |
396 | result = 1; |
397 | |
398 | end: |
399 | if (!result) { |
400 | TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR); |
401 | if (ctx->response != NULL) { |
402 | if (TS_RESP_CTX_set_status_info_cond(ctx, |
403 | TS_STATUS_REJECTION, |
404 | "Error during response " |
405 | "generation." ) == 0) { |
406 | TS_RESP_free(ctx->response); |
407 | ctx->response = NULL; |
408 | } |
409 | } |
410 | } |
411 | response = ctx->response; |
412 | ctx->response = NULL; /* Ownership will be returned to caller. */ |
413 | ts_RESP_CTX_cleanup(ctx); |
414 | return response; |
415 | } |
416 | |
417 | /* Initializes the variable part of the context. */ |
418 | static void ts_RESP_CTX_init(TS_RESP_CTX *ctx) |
419 | { |
420 | ctx->request = NULL; |
421 | ctx->response = NULL; |
422 | ctx->tst_info = NULL; |
423 | } |
424 | |
425 | /* Cleans up the variable part of the context. */ |
426 | static void ts_RESP_CTX_cleanup(TS_RESP_CTX *ctx) |
427 | { |
428 | TS_REQ_free(ctx->request); |
429 | ctx->request = NULL; |
430 | TS_RESP_free(ctx->response); |
431 | ctx->response = NULL; |
432 | TS_TST_INFO_free(ctx->tst_info); |
433 | ctx->tst_info = NULL; |
434 | } |
435 | |
436 | /* Checks the format and content of the request. */ |
437 | static int ts_RESP_check_request(TS_RESP_CTX *ctx) |
438 | { |
439 | TS_REQ *request = ctx->request; |
440 | TS_MSG_IMPRINT *msg_imprint; |
441 | X509_ALGOR *md_alg; |
442 | int md_alg_id; |
443 | const ASN1_OCTET_STRING *digest; |
444 | const EVP_MD *md = NULL; |
445 | int i; |
446 | |
447 | if (TS_REQ_get_version(request) != 1) { |
448 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
449 | "Bad request version." ); |
450 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_REQUEST); |
451 | return 0; |
452 | } |
453 | |
454 | msg_imprint = request->msg_imprint; |
455 | md_alg = msg_imprint->hash_algo; |
456 | md_alg_id = OBJ_obj2nid(md_alg->algorithm); |
457 | for (i = 0; !md && i < sk_EVP_MD_num(ctx->mds); ++i) { |
458 | const EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i); |
459 | if (md_alg_id == EVP_MD_type(current_md)) |
460 | md = current_md; |
461 | } |
462 | if (!md) { |
463 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
464 | "Message digest algorithm is " |
465 | "not supported." ); |
466 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG); |
467 | return 0; |
468 | } |
469 | |
470 | if (md_alg->parameter && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL) { |
471 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
472 | "Superfluous message digest " |
473 | "parameter." ); |
474 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG); |
475 | return 0; |
476 | } |
477 | digest = msg_imprint->hashed_msg; |
478 | if (digest->length != EVP_MD_size(md)) { |
479 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
480 | "Bad message digest." ); |
481 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT); |
482 | return 0; |
483 | } |
484 | |
485 | return 1; |
486 | } |
487 | |
488 | /* Returns the TSA policy based on the requested and acceptable policies. */ |
489 | static ASN1_OBJECT *ts_RESP_get_policy(TS_RESP_CTX *ctx) |
490 | { |
491 | ASN1_OBJECT *requested = ctx->request->policy_id; |
492 | ASN1_OBJECT *policy = NULL; |
493 | int i; |
494 | |
495 | if (ctx->default_policy == NULL) { |
496 | TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER); |
497 | return NULL; |
498 | } |
499 | if (!requested || !OBJ_cmp(requested, ctx->default_policy)) |
500 | policy = ctx->default_policy; |
501 | |
502 | /* Check if the policy is acceptable. */ |
503 | for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i) { |
504 | ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i); |
505 | if (!OBJ_cmp(requested, current)) |
506 | policy = current; |
507 | } |
508 | if (policy == NULL) { |
509 | TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY); |
510 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, |
511 | "Requested policy is not " "supported." ); |
512 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY); |
513 | } |
514 | return policy; |
515 | } |
516 | |
517 | /* Creates the TS_TST_INFO object based on the settings of the context. */ |
518 | static TS_TST_INFO *ts_RESP_create_tst_info(TS_RESP_CTX *ctx, |
519 | ASN1_OBJECT *policy) |
520 | { |
521 | int result = 0; |
522 | TS_TST_INFO *tst_info = NULL; |
523 | ASN1_INTEGER *serial = NULL; |
524 | ASN1_GENERALIZEDTIME *asn1_time = NULL; |
525 | long sec, usec; |
526 | TS_ACCURACY *accuracy = NULL; |
527 | const ASN1_INTEGER *nonce; |
528 | GENERAL_NAME *tsa_name = NULL; |
529 | |
530 | if ((tst_info = TS_TST_INFO_new()) == NULL) |
531 | goto end; |
532 | if (!TS_TST_INFO_set_version(tst_info, 1)) |
533 | goto end; |
534 | if (!TS_TST_INFO_set_policy_id(tst_info, policy)) |
535 | goto end; |
536 | if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint)) |
537 | goto end; |
538 | if ((serial = ctx->serial_cb(ctx, ctx->serial_cb_data)) == NULL |
539 | || !TS_TST_INFO_set_serial(tst_info, serial)) |
540 | goto end; |
541 | if (!ctx->time_cb(ctx, ctx->time_cb_data, &sec, &usec) |
542 | || (asn1_time = |
543 | TS_RESP_set_genTime_with_precision(NULL, sec, usec, |
544 | ctx->clock_precision_digits)) == NULL |
545 | || !TS_TST_INFO_set_time(tst_info, asn1_time)) |
546 | goto end; |
547 | |
548 | if ((ctx->seconds || ctx->millis || ctx->micros) |
549 | && (accuracy = TS_ACCURACY_new()) == NULL) |
550 | goto end; |
551 | if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds)) |
552 | goto end; |
553 | if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis)) |
554 | goto end; |
555 | if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros)) |
556 | goto end; |
557 | if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy)) |
558 | goto end; |
559 | |
560 | if ((ctx->flags & TS_ORDERING) |
561 | && !TS_TST_INFO_set_ordering(tst_info, 1)) |
562 | goto end; |
563 | |
564 | if ((nonce = ctx->request->nonce) != NULL |
565 | && !TS_TST_INFO_set_nonce(tst_info, nonce)) |
566 | goto end; |
567 | |
568 | if (ctx->flags & TS_TSA_NAME) { |
569 | if ((tsa_name = GENERAL_NAME_new()) == NULL) |
570 | goto end; |
571 | tsa_name->type = GEN_DIRNAME; |
572 | tsa_name->d.dirn = |
573 | X509_NAME_dup(X509_get_subject_name(ctx->signer_cert)); |
574 | if (!tsa_name->d.dirn) |
575 | goto end; |
576 | if (!TS_TST_INFO_set_tsa(tst_info, tsa_name)) |
577 | goto end; |
578 | } |
579 | |
580 | result = 1; |
581 | end: |
582 | if (!result) { |
583 | TS_TST_INFO_free(tst_info); |
584 | tst_info = NULL; |
585 | TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR); |
586 | TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION, |
587 | "Error during TSTInfo " |
588 | "generation." ); |
589 | } |
590 | GENERAL_NAME_free(tsa_name); |
591 | TS_ACCURACY_free(accuracy); |
592 | ASN1_GENERALIZEDTIME_free(asn1_time); |
593 | ASN1_INTEGER_free(serial); |
594 | |
595 | return tst_info; |
596 | } |
597 | |
598 | /* Processing the extensions of the request. */ |
599 | static int ts_RESP_process_extensions(TS_RESP_CTX *ctx) |
600 | { |
601 | STACK_OF(X509_EXTENSION) *exts = ctx->request->extensions; |
602 | int i; |
603 | int ok = 1; |
604 | |
605 | for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i) { |
606 | X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i); |
607 | /* |
608 | * The last argument was previously (void *)ctx->extension_cb, |
609 | * but ISO C doesn't permit converting a function pointer to void *. |
610 | * For lack of better information, I'm placing a NULL there instead. |
611 | * The callback can pick its own address out from the ctx anyway... |
612 | */ |
613 | ok = (*ctx->extension_cb) (ctx, ext, NULL); |
614 | } |
615 | |
616 | return ok; |
617 | } |
618 | |
619 | /* Functions for signing the TS_TST_INFO structure of the context. */ |
620 | static int ts_RESP_sign(TS_RESP_CTX *ctx) |
621 | { |
622 | int ret = 0; |
623 | PKCS7 *p7 = NULL; |
624 | PKCS7_SIGNER_INFO *si; |
625 | STACK_OF(X509) *certs; /* Certificates to include in sc. */ |
626 | ESS_SIGNING_CERT_V2 *sc2 = NULL; |
627 | ESS_SIGNING_CERT *sc = NULL; |
628 | ASN1_OBJECT *oid; |
629 | BIO *p7bio = NULL; |
630 | int i; |
631 | |
632 | if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) { |
633 | TSerr(TS_F_TS_RESP_SIGN, TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); |
634 | goto err; |
635 | } |
636 | |
637 | if ((p7 = PKCS7_new()) == NULL) { |
638 | TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE); |
639 | goto err; |
640 | } |
641 | if (!PKCS7_set_type(p7, NID_pkcs7_signed)) |
642 | goto err; |
643 | if (!ASN1_INTEGER_set(p7->d.sign->version, 3)) |
644 | goto err; |
645 | |
646 | if (ctx->request->cert_req) { |
647 | PKCS7_add_certificate(p7, ctx->signer_cert); |
648 | if (ctx->certs) { |
649 | for (i = 0; i < sk_X509_num(ctx->certs); ++i) { |
650 | X509 *cert = sk_X509_value(ctx->certs, i); |
651 | PKCS7_add_certificate(p7, cert); |
652 | } |
653 | } |
654 | } |
655 | |
656 | if ((si = PKCS7_add_signature(p7, ctx->signer_cert, |
657 | ctx->signer_key, ctx->signer_md)) == NULL) { |
658 | TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR); |
659 | goto err; |
660 | } |
661 | |
662 | oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo); |
663 | if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType, |
664 | V_ASN1_OBJECT, oid)) { |
665 | TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR); |
666 | goto err; |
667 | } |
668 | |
669 | certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL; |
670 | if (ctx->ess_cert_id_digest == NULL |
671 | || ctx->ess_cert_id_digest == EVP_sha1()) { |
672 | if ((sc = ESS_SIGNING_CERT_new_init(ctx->signer_cert, certs, 0)) == NULL) |
673 | goto err; |
674 | |
675 | if (!ESS_SIGNING_CERT_add(si, sc)) { |
676 | TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR); |
677 | goto err; |
678 | } |
679 | } else { |
680 | sc2 = ESS_SIGNING_CERT_V2_new_init(ctx->ess_cert_id_digest, |
681 | ctx->signer_cert, certs, 0); |
682 | if (sc2 == NULL) |
683 | goto err; |
684 | |
685 | if (!ESS_SIGNING_CERT_V2_add(si, sc2)) { |
686 | TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_V2_ERROR); |
687 | goto err; |
688 | } |
689 | } |
690 | |
691 | if (!ts_TST_INFO_content_new(p7)) |
692 | goto err; |
693 | if ((p7bio = PKCS7_dataInit(p7, NULL)) == NULL) { |
694 | TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE); |
695 | goto err; |
696 | } |
697 | if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info)) { |
698 | TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN); |
699 | goto err; |
700 | } |
701 | if (!PKCS7_dataFinal(p7, p7bio)) { |
702 | TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN); |
703 | goto err; |
704 | } |
705 | TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info); |
706 | p7 = NULL; /* Ownership is lost. */ |
707 | ctx->tst_info = NULL; /* Ownership is lost. */ |
708 | |
709 | ret = 1; |
710 | err: |
711 | if (!ret) |
712 | TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION, |
713 | "Error during signature " |
714 | "generation." ); |
715 | BIO_free_all(p7bio); |
716 | ESS_SIGNING_CERT_V2_free(sc2); |
717 | ESS_SIGNING_CERT_free(sc); |
718 | PKCS7_free(p7); |
719 | return ret; |
720 | } |
721 | |
722 | static int ts_TST_INFO_content_new(PKCS7 *p7) |
723 | { |
724 | PKCS7 *ret = NULL; |
725 | ASN1_OCTET_STRING *octet_string = NULL; |
726 | |
727 | /* Create new encapsulated NID_id_smime_ct_TSTInfo content. */ |
728 | if ((ret = PKCS7_new()) == NULL) |
729 | goto err; |
730 | if ((ret->d.other = ASN1_TYPE_new()) == NULL) |
731 | goto err; |
732 | ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo); |
733 | if ((octet_string = ASN1_OCTET_STRING_new()) == NULL) |
734 | goto err; |
735 | ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string); |
736 | octet_string = NULL; |
737 | |
738 | /* Add encapsulated content to signed PKCS7 structure. */ |
739 | if (!PKCS7_set_content(p7, ret)) |
740 | goto err; |
741 | |
742 | return 1; |
743 | err: |
744 | ASN1_OCTET_STRING_free(octet_string); |
745 | PKCS7_free(ret); |
746 | return 0; |
747 | } |
748 | |
749 | static ASN1_GENERALIZEDTIME *TS_RESP_set_genTime_with_precision( |
750 | ASN1_GENERALIZEDTIME *asn1_time, long sec, long usec, |
751 | unsigned precision) |
752 | { |
753 | time_t time_sec = (time_t)sec; |
754 | struct tm *tm = NULL, tm_result; |
755 | char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS]; |
756 | char *p = genTime_str; |
757 | char *p_end = genTime_str + sizeof(genTime_str); |
758 | |
759 | if (precision > TS_MAX_CLOCK_PRECISION_DIGITS) |
760 | goto err; |
761 | |
762 | if ((tm = OPENSSL_gmtime(&time_sec, &tm_result)) == NULL) |
763 | goto err; |
764 | |
765 | /* |
766 | * Put "genTime_str" in GeneralizedTime format. We work around the |
767 | * restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST |
768 | * NOT include fractional seconds") and OpenSSL related functions to |
769 | * meet the rfc3161 requirement: "GeneralizedTime syntax can include |
770 | * fraction-of-second details". |
771 | */ |
772 | p += BIO_snprintf(p, p_end - p, |
773 | "%04d%02d%02d%02d%02d%02d" , |
774 | tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, |
775 | tm->tm_hour, tm->tm_min, tm->tm_sec); |
776 | if (precision > 0) { |
777 | BIO_snprintf(p, 2 + precision, ".%06ld" , usec); |
778 | p += strlen(p); |
779 | |
780 | /* |
781 | * To make things a bit harder, X.690 | ISO/IEC 8825-1 provides the |
782 | * following restrictions for a DER-encoding, which OpenSSL |
783 | * (specifically ASN1_GENERALIZEDTIME_check() function) doesn't |
784 | * support: "The encoding MUST terminate with a "Z" (which means |
785 | * "Zulu" time). The decimal point element, if present, MUST be the |
786 | * point option ".". The fractional-seconds elements, if present, |
787 | * MUST omit all trailing 0's; if the elements correspond to 0, they |
788 | * MUST be wholly omitted, and the decimal point element also MUST be |
789 | * omitted." |
790 | */ |
791 | /* |
792 | * Remove trailing zeros. The dot guarantees the exit condition of |
793 | * this loop even if all the digits are zero. |
794 | */ |
795 | while (*--p == '0') |
796 | continue; |
797 | if (*p != '.') |
798 | ++p; |
799 | } |
800 | *p++ = 'Z'; |
801 | *p++ = '\0'; |
802 | |
803 | if (asn1_time == NULL |
804 | && (asn1_time = ASN1_GENERALIZEDTIME_new()) == NULL) |
805 | goto err; |
806 | if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str)) { |
807 | ASN1_GENERALIZEDTIME_free(asn1_time); |
808 | goto err; |
809 | } |
810 | return asn1_time; |
811 | |
812 | err: |
813 | TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME); |
814 | return NULL; |
815 | } |
816 | |
817 | int TS_RESP_CTX_set_ess_cert_id_digest(TS_RESP_CTX *ctx, const EVP_MD *md) |
818 | { |
819 | ctx->ess_cert_id_digest = md; |
820 | return 1; |
821 | } |
822 | |