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c7235be6 | 1 | /* crypto/ts/ts_resp_sign.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL project | |
4 | * 2002. | |
c7235be6 UM |
5 | */ |
6 | /* ==================================================================== | |
7 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * | |
13 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
c7235be6 UM |
15 | * |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in | |
18 | * the documentation and/or other materials provided with the | |
19 | * distribution. | |
20 | * | |
21 | * 3. All advertising materials mentioning features or use of this | |
22 | * software must display the following acknowledgment: | |
23 | * "This product includes software developed by the OpenSSL Project | |
24 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
25 | * | |
26 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
27 | * endorse or promote products derived from this software without | |
28 | * prior written permission. For written permission, please contact | |
29 | * licensing@OpenSSL.org. | |
30 | * | |
31 | * 5. Products derived from this software may not be called "OpenSSL" | |
32 | * nor may "OpenSSL" appear in their names without prior written | |
33 | * permission of the OpenSSL Project. | |
34 | * | |
35 | * 6. Redistributions of any form whatsoever must retain the following | |
36 | * acknowledgment: | |
37 | * "This product includes software developed by the OpenSSL Project | |
38 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
39 | * | |
40 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
41 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
43 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
44 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
45 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
47 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
49 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
50 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
51 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
52 | * ==================================================================== | |
53 | * | |
54 | * This product includes cryptographic software written by Eric Young | |
55 | * (eay@cryptsoft.com). This product includes software written by Tim | |
56 | * Hudson (tjh@cryptsoft.com). | |
57 | * | |
58 | */ | |
59 | ||
60 | #include "cryptlib.h" | |
61 | ||
62 | #if defined(OPENSSL_SYS_UNIX) | |
0f113f3e | 63 | # include <sys/time.h> |
c7235be6 UM |
64 | #endif |
65 | ||
66 | #include <openssl/objects.h> | |
67 | #include <openssl/ts.h> | |
68 | #include <openssl/pkcs7.h> | |
69 | ||
70 | /* Private function declarations. */ | |
71 | ||
72 | static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *, void *); | |
73 | static int def_time_cb(struct TS_resp_ctx *, void *, long *sec, long *usec); | |
74 | static int def_extension_cb(struct TS_resp_ctx *, X509_EXTENSION *, void *); | |
75 | ||
76 | static void TS_RESP_CTX_init(TS_RESP_CTX *ctx); | |
77 | static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx); | |
78 | static int TS_RESP_check_request(TS_RESP_CTX *ctx); | |
79 | static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx); | |
0f113f3e MC |
80 | static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx, |
81 | ASN1_OBJECT *policy); | |
c7235be6 UM |
82 | static int TS_RESP_process_extensions(TS_RESP_CTX *ctx); |
83 | static int TS_RESP_sign(TS_RESP_CTX *ctx); | |
84 | ||
0f113f3e MC |
85 | static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert, |
86 | STACK_OF(X509) *certs); | |
c7235be6 UM |
87 | static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed); |
88 | static int TS_TST_INFO_content_new(PKCS7 *p7); | |
89 | static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc); | |
90 | ||
0f113f3e MC |
91 | static ASN1_GENERALIZEDTIME |
92 | *TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *, long, long, | |
93 | unsigned); | |
c7235be6 UM |
94 | |
95 | /* Default callbacks for response generation. */ | |
96 | ||
97 | static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *ctx, void *data) | |
0f113f3e MC |
98 | { |
99 | ASN1_INTEGER *serial = ASN1_INTEGER_new(); | |
100 | if (!serial) | |
101 | goto err; | |
102 | if (!ASN1_INTEGER_set(serial, 1)) | |
103 | goto err; | |
104 | return serial; | |
c7235be6 | 105 | err: |
0f113f3e MC |
106 | TSerr(TS_F_DEF_SERIAL_CB, ERR_R_MALLOC_FAILURE); |
107 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, | |
108 | "Error during serial number generation."); | |
109 | return NULL; | |
110 | } | |
c7235be6 UM |
111 | |
112 | #if defined(OPENSSL_SYS_UNIX) | |
113 | ||
114 | /* Use the gettimeofday function call. */ | |
0f113f3e MC |
115 | static int def_time_cb(struct TS_resp_ctx *ctx, void *data, |
116 | long *sec, long *usec) | |
117 | { | |
118 | struct timeval tv; | |
119 | if (gettimeofday(&tv, NULL) != 0) { | |
120 | TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR); | |
121 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, | |
122 | "Time is not available."); | |
123 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE); | |
124 | return 0; | |
125 | } | |
126 | /* Return time to caller. */ | |
127 | *sec = tv.tv_sec; | |
128 | *usec = tv.tv_usec; | |
129 | ||
130 | return 1; | |
131 | } | |
c7235be6 UM |
132 | |
133 | #else | |
134 | ||
135 | /* Use the time function call that provides only seconds precision. */ | |
0f113f3e MC |
136 | static int def_time_cb(struct TS_resp_ctx *ctx, void *data, |
137 | long *sec, long *usec) | |
138 | { | |
139 | time_t t; | |
140 | if (time(&t) == (time_t)-1) { | |
141 | TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR); | |
142 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, | |
143 | "Time is not available."); | |
144 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE); | |
145 | return 0; | |
146 | } | |
147 | /* Return time to caller, only second precision. */ | |
148 | *sec = (long)t; | |
149 | *usec = 0; | |
150 | ||
151 | return 1; | |
152 | } | |
c7235be6 UM |
153 | |
154 | #endif | |
155 | ||
156 | static int def_extension_cb(struct TS_resp_ctx *ctx, X509_EXTENSION *ext, | |
0f113f3e MC |
157 | void *data) |
158 | { | |
159 | /* No extensions are processed here. */ | |
160 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, | |
161 | "Unsupported extension."); | |
162 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_EXTENSION); | |
163 | return 0; | |
164 | } | |
c7235be6 UM |
165 | |
166 | /* TS_RESP_CTX management functions. */ | |
167 | ||
168 | TS_RESP_CTX *TS_RESP_CTX_new() | |
0f113f3e MC |
169 | { |
170 | TS_RESP_CTX *ctx; | |
c7235be6 | 171 | |
b196e7d9 | 172 | if (!(ctx = OPENSSL_malloc(sizeof(TS_RESP_CTX)))) { |
0f113f3e MC |
173 | TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE); |
174 | return NULL; | |
175 | } | |
176 | memset(ctx, 0, sizeof(TS_RESP_CTX)); | |
c7235be6 | 177 | |
0f113f3e MC |
178 | /* Setting default callbacks. */ |
179 | ctx->serial_cb = def_serial_cb; | |
180 | ctx->time_cb = def_time_cb; | |
181 | ctx->extension_cb = def_extension_cb; | |
c7235be6 | 182 | |
0f113f3e MC |
183 | return ctx; |
184 | } | |
c7235be6 UM |
185 | |
186 | void TS_RESP_CTX_free(TS_RESP_CTX *ctx) | |
0f113f3e MC |
187 | { |
188 | if (!ctx) | |
189 | return; | |
190 | ||
191 | X509_free(ctx->signer_cert); | |
192 | EVP_PKEY_free(ctx->signer_key); | |
193 | sk_X509_pop_free(ctx->certs, X509_free); | |
194 | sk_ASN1_OBJECT_pop_free(ctx->policies, ASN1_OBJECT_free); | |
195 | ASN1_OBJECT_free(ctx->default_policy); | |
196 | sk_EVP_MD_free(ctx->mds); /* No EVP_MD_free method exists. */ | |
197 | ASN1_INTEGER_free(ctx->seconds); | |
198 | ASN1_INTEGER_free(ctx->millis); | |
199 | ASN1_INTEGER_free(ctx->micros); | |
200 | OPENSSL_free(ctx); | |
201 | } | |
c7235be6 UM |
202 | |
203 | int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX *ctx, X509 *signer) | |
0f113f3e MC |
204 | { |
205 | if (X509_check_purpose(signer, X509_PURPOSE_TIMESTAMP_SIGN, 0) != 1) { | |
206 | TSerr(TS_F_TS_RESP_CTX_SET_SIGNER_CERT, | |
207 | TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE); | |
208 | return 0; | |
209 | } | |
210 | if (ctx->signer_cert) | |
211 | X509_free(ctx->signer_cert); | |
212 | ctx->signer_cert = signer; | |
213 | CRYPTO_add(&ctx->signer_cert->references, +1, CRYPTO_LOCK_X509); | |
214 | return 1; | |
215 | } | |
c7235be6 UM |
216 | |
217 | int TS_RESP_CTX_set_signer_key(TS_RESP_CTX *ctx, EVP_PKEY *key) | |
0f113f3e | 218 | { |
c5ba2d99 | 219 | EVP_PKEY_free(ctx->signer_key); |
0f113f3e MC |
220 | ctx->signer_key = key; |
221 | CRYPTO_add(&ctx->signer_key->references, +1, CRYPTO_LOCK_EVP_PKEY); | |
c7235be6 | 222 | |
0f113f3e MC |
223 | return 1; |
224 | } | |
c7235be6 UM |
225 | |
226 | int TS_RESP_CTX_set_def_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *def_policy) | |
0f113f3e | 227 | { |
2ace7450 | 228 | ASN1_OBJECT_free(ctx->default_policy); |
0f113f3e MC |
229 | if (!(ctx->default_policy = OBJ_dup(def_policy))) |
230 | goto err; | |
231 | return 1; | |
c7235be6 | 232 | err: |
0f113f3e MC |
233 | TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE); |
234 | return 0; | |
235 | } | |
c7235be6 UM |
236 | |
237 | int TS_RESP_CTX_set_certs(TS_RESP_CTX *ctx, STACK_OF(X509) *certs) | |
0f113f3e MC |
238 | { |
239 | ||
240 | if (ctx->certs) { | |
241 | sk_X509_pop_free(ctx->certs, X509_free); | |
242 | ctx->certs = NULL; | |
243 | } | |
244 | if (!certs) | |
245 | return 1; | |
246 | if (!(ctx->certs = X509_chain_up_ref(certs))) { | |
247 | TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE); | |
248 | return 0; | |
249 | } | |
250 | ||
251 | return 1; | |
252 | } | |
c7235be6 UM |
253 | |
254 | int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *policy) | |
0f113f3e MC |
255 | { |
256 | ASN1_OBJECT *copy = NULL; | |
257 | ||
258 | /* Create new policy stack if necessary. */ | |
259 | if (!ctx->policies && !(ctx->policies = sk_ASN1_OBJECT_new_null())) | |
260 | goto err; | |
261 | if (!(copy = OBJ_dup(policy))) | |
262 | goto err; | |
263 | if (!sk_ASN1_OBJECT_push(ctx->policies, copy)) | |
264 | goto err; | |
265 | ||
266 | return 1; | |
c7235be6 | 267 | err: |
0f113f3e MC |
268 | TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE); |
269 | ASN1_OBJECT_free(copy); | |
270 | return 0; | |
271 | } | |
c7235be6 UM |
272 | |
273 | int TS_RESP_CTX_add_md(TS_RESP_CTX *ctx, const EVP_MD *md) | |
0f113f3e MC |
274 | { |
275 | /* Create new md stack if necessary. */ | |
276 | if (!ctx->mds && !(ctx->mds = sk_EVP_MD_new_null())) | |
277 | goto err; | |
278 | /* Add the shared md, no copy needed. */ | |
279 | if (!sk_EVP_MD_push(ctx->mds, (EVP_MD *)md)) | |
280 | goto err; | |
281 | ||
282 | return 1; | |
c7235be6 | 283 | err: |
0f113f3e MC |
284 | TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE); |
285 | return 0; | |
286 | } | |
287 | ||
288 | #define TS_RESP_CTX_accuracy_free(ctx) \ | |
289 | ASN1_INTEGER_free(ctx->seconds); \ | |
290 | ctx->seconds = NULL; \ | |
291 | ASN1_INTEGER_free(ctx->millis); \ | |
292 | ctx->millis = NULL; \ | |
293 | ASN1_INTEGER_free(ctx->micros); \ | |
294 | ctx->micros = NULL; | |
295 | ||
296 | int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx, | |
297 | int secs, int millis, int micros) | |
298 | { | |
299 | ||
300 | TS_RESP_CTX_accuracy_free(ctx); | |
301 | if (secs && (!(ctx->seconds = ASN1_INTEGER_new()) | |
302 | || !ASN1_INTEGER_set(ctx->seconds, secs))) | |
303 | goto err; | |
304 | if (millis && (!(ctx->millis = ASN1_INTEGER_new()) | |
305 | || !ASN1_INTEGER_set(ctx->millis, millis))) | |
306 | goto err; | |
307 | if (micros && (!(ctx->micros = ASN1_INTEGER_new()) | |
308 | || !ASN1_INTEGER_set(ctx->micros, micros))) | |
309 | goto err; | |
310 | ||
311 | return 1; | |
c7235be6 | 312 | err: |
0f113f3e MC |
313 | TS_RESP_CTX_accuracy_free(ctx); |
314 | TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE); | |
315 | return 0; | |
316 | } | |
c7235be6 UM |
317 | |
318 | void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags) | |
0f113f3e MC |
319 | { |
320 | ctx->flags |= flags; | |
321 | } | |
c7235be6 UM |
322 | |
323 | void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data) | |
0f113f3e MC |
324 | { |
325 | ctx->serial_cb = cb; | |
326 | ctx->serial_cb_data = data; | |
327 | } | |
c7235be6 UM |
328 | |
329 | void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data) | |
0f113f3e MC |
330 | { |
331 | ctx->time_cb = cb; | |
332 | ctx->time_cb_data = data; | |
333 | } | |
334 | ||
335 | void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx, | |
336 | TS_extension_cb cb, void *data) | |
337 | { | |
338 | ctx->extension_cb = cb; | |
339 | ctx->extension_cb_data = data; | |
340 | } | |
341 | ||
342 | int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx, | |
343 | int status, const char *text) | |
344 | { | |
345 | TS_STATUS_INFO *si = NULL; | |
346 | ASN1_UTF8STRING *utf8_text = NULL; | |
347 | int ret = 0; | |
348 | ||
349 | if (!(si = TS_STATUS_INFO_new())) | |
350 | goto err; | |
351 | if (!ASN1_INTEGER_set(si->status, status)) | |
352 | goto err; | |
353 | if (text) { | |
354 | if (!(utf8_text = ASN1_UTF8STRING_new()) | |
355 | || !ASN1_STRING_set(utf8_text, text, strlen(text))) | |
356 | goto err; | |
357 | if (!si->text && !(si->text = sk_ASN1_UTF8STRING_new_null())) | |
358 | goto err; | |
359 | if (!sk_ASN1_UTF8STRING_push(si->text, utf8_text)) | |
360 | goto err; | |
361 | utf8_text = NULL; /* Ownership is lost. */ | |
362 | } | |
363 | if (!TS_RESP_set_status_info(ctx->response, si)) | |
364 | goto err; | |
365 | ret = 1; | |
c7235be6 | 366 | err: |
0f113f3e MC |
367 | if (!ret) |
368 | TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE); | |
369 | TS_STATUS_INFO_free(si); | |
370 | ASN1_UTF8STRING_free(utf8_text); | |
371 | return ret; | |
372 | } | |
373 | ||
374 | int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx, | |
375 | int status, const char *text) | |
376 | { | |
377 | int ret = 1; | |
378 | TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response); | |
379 | ||
380 | if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED) { | |
381 | /* Status has not been set, set it now. */ | |
382 | ret = TS_RESP_CTX_set_status_info(ctx, status, text); | |
383 | } | |
384 | return ret; | |
385 | } | |
c7235be6 UM |
386 | |
387 | int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure) | |
0f113f3e MC |
388 | { |
389 | TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response); | |
390 | if (!si->failure_info && !(si->failure_info = ASN1_BIT_STRING_new())) | |
391 | goto err; | |
392 | if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1)) | |
393 | goto err; | |
394 | return 1; | |
c7235be6 | 395 | err: |
0f113f3e MC |
396 | TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE); |
397 | return 0; | |
398 | } | |
c7235be6 UM |
399 | |
400 | TS_REQ *TS_RESP_CTX_get_request(TS_RESP_CTX *ctx) | |
0f113f3e MC |
401 | { |
402 | return ctx->request; | |
403 | } | |
c7235be6 UM |
404 | |
405 | TS_TST_INFO *TS_RESP_CTX_get_tst_info(TS_RESP_CTX *ctx) | |
0f113f3e MC |
406 | { |
407 | return ctx->tst_info; | |
408 | } | |
409 | ||
410 | int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx, | |
411 | unsigned precision) | |
412 | { | |
413 | if (precision > TS_MAX_CLOCK_PRECISION_DIGITS) | |
414 | return 0; | |
415 | ctx->clock_precision_digits = precision; | |
416 | return 1; | |
417 | } | |
c7235be6 UM |
418 | |
419 | /* Main entry method of the response generation. */ | |
420 | TS_RESP *TS_RESP_create_response(TS_RESP_CTX *ctx, BIO *req_bio) | |
0f113f3e MC |
421 | { |
422 | ASN1_OBJECT *policy; | |
423 | TS_RESP *response; | |
424 | int result = 0; | |
425 | ||
426 | TS_RESP_CTX_init(ctx); | |
427 | ||
428 | /* Creating the response object. */ | |
429 | if (!(ctx->response = TS_RESP_new())) { | |
430 | TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE); | |
431 | goto end; | |
432 | } | |
433 | ||
434 | /* Parsing DER request. */ | |
435 | 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 " "system error."); | |
438 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT); | |
439 | goto end; | |
440 | } | |
441 | ||
442 | /* Setting default status info. */ | |
443 | if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL)) | |
444 | goto end; | |
445 | ||
446 | /* Checking the request format. */ | |
447 | if (!TS_RESP_check_request(ctx)) | |
448 | goto end; | |
449 | ||
450 | /* Checking acceptable policies. */ | |
451 | if (!(policy = TS_RESP_get_policy(ctx))) | |
452 | goto end; | |
453 | ||
454 | /* Creating the TS_TST_INFO object. */ | |
455 | if (!(ctx->tst_info = TS_RESP_create_tst_info(ctx, policy))) | |
456 | goto end; | |
457 | ||
458 | /* Processing extensions. */ | |
459 | if (!TS_RESP_process_extensions(ctx)) | |
460 | goto end; | |
461 | ||
462 | /* Generating the signature. */ | |
463 | if (!TS_RESP_sign(ctx)) | |
464 | goto end; | |
465 | ||
466 | /* Everything was successful. */ | |
467 | result = 1; | |
c7235be6 | 468 | end: |
0f113f3e MC |
469 | if (!result) { |
470 | TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR); | |
471 | if (ctx->response != NULL) { | |
472 | if (TS_RESP_CTX_set_status_info_cond(ctx, | |
473 | TS_STATUS_REJECTION, | |
474 | "Error during response " | |
475 | "generation.") == 0) { | |
476 | TS_RESP_free(ctx->response); | |
477 | ctx->response = NULL; | |
478 | } | |
479 | } | |
480 | } | |
481 | response = ctx->response; | |
482 | ctx->response = NULL; /* Ownership will be returned to caller. */ | |
483 | TS_RESP_CTX_cleanup(ctx); | |
484 | return response; | |
485 | } | |
c7235be6 UM |
486 | |
487 | /* Initializes the variable part of the context. */ | |
488 | static void TS_RESP_CTX_init(TS_RESP_CTX *ctx) | |
0f113f3e MC |
489 | { |
490 | ctx->request = NULL; | |
491 | ctx->response = NULL; | |
492 | ctx->tst_info = NULL; | |
493 | } | |
c7235be6 UM |
494 | |
495 | /* Cleans up the variable part of the context. */ | |
496 | static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx) | |
0f113f3e MC |
497 | { |
498 | TS_REQ_free(ctx->request); | |
499 | ctx->request = NULL; | |
500 | TS_RESP_free(ctx->response); | |
501 | ctx->response = NULL; | |
502 | TS_TST_INFO_free(ctx->tst_info); | |
503 | ctx->tst_info = NULL; | |
504 | } | |
c7235be6 UM |
505 | |
506 | /* Checks the format and content of the request. */ | |
507 | static int TS_RESP_check_request(TS_RESP_CTX *ctx) | |
0f113f3e MC |
508 | { |
509 | TS_REQ *request = ctx->request; | |
510 | TS_MSG_IMPRINT *msg_imprint; | |
511 | X509_ALGOR *md_alg; | |
512 | int md_alg_id; | |
513 | const ASN1_OCTET_STRING *digest; | |
514 | EVP_MD *md = NULL; | |
515 | int i; | |
516 | ||
517 | /* Checking request version. */ | |
518 | 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); | |
522 | return 0; | |
523 | } | |
524 | ||
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) { | |
530 | EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i); | |
531 | if (md_alg_id == EVP_MD_type(current_md)) | |
532 | md = current_md; | |
533 | } | |
534 | if (!md) { | |
535 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, | |
536 | "Message digest algorithm is " | |
537 | "not supported."); | |
538 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG); | |
539 | return 0; | |
540 | } | |
541 | ||
542 | /* No message digest takes parameter. */ | |
543 | if (md_alg->parameter && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL) { | |
544 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, | |
545 | "Superfluous message digest " | |
546 | "parameter."); | |
547 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG); | |
548 | return 0; | |
549 | } | |
550 | /* Checking message digest size. */ | |
551 | digest = TS_MSG_IMPRINT_get_msg(msg_imprint); | |
552 | if (digest->length != EVP_MD_size(md)) { | |
553 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, | |
554 | "Bad message digest."); | |
555 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT); | |
556 | return 0; | |
557 | } | |
558 | ||
559 | return 1; | |
560 | } | |
c7235be6 | 561 | |
b4e88ccb | 562 | /* Returns the TSA policy based on the requested and acceptable policies. */ |
c7235be6 | 563 | static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx) |
0f113f3e MC |
564 | { |
565 | ASN1_OBJECT *requested = TS_REQ_get_policy_id(ctx->request); | |
566 | ASN1_OBJECT *policy = NULL; | |
567 | int i; | |
568 | ||
569 | if (ctx->default_policy == NULL) { | |
570 | TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER); | |
571 | return NULL; | |
572 | } | |
573 | /* | |
574 | * Return the default policy if none is requested or the default is | |
575 | * requested. | |
576 | */ | |
577 | if (!requested || !OBJ_cmp(requested, ctx->default_policy)) | |
578 | policy = ctx->default_policy; | |
579 | ||
580 | /* Check if the policy is acceptable. */ | |
581 | for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i) { | |
582 | ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i); | |
583 | if (!OBJ_cmp(requested, current)) | |
584 | policy = current; | |
585 | } | |
586 | if (!policy) { | |
587 | TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY); | |
588 | TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, | |
589 | "Requested policy is not " "supported."); | |
590 | TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY); | |
591 | } | |
592 | return policy; | |
593 | } | |
c7235be6 UM |
594 | |
595 | /* Creates the TS_TST_INFO object based on the settings of the context. */ | |
596 | static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx, | |
0f113f3e MC |
597 | ASN1_OBJECT *policy) |
598 | { | |
599 | int result = 0; | |
600 | TS_TST_INFO *tst_info = NULL; | |
601 | ASN1_INTEGER *serial = NULL; | |
602 | ASN1_GENERALIZEDTIME *asn1_time = NULL; | |
603 | long sec, usec; | |
604 | TS_ACCURACY *accuracy = NULL; | |
605 | const ASN1_INTEGER *nonce; | |
606 | GENERAL_NAME *tsa_name = NULL; | |
607 | ||
608 | if (!(tst_info = TS_TST_INFO_new())) | |
609 | goto end; | |
610 | if (!TS_TST_INFO_set_version(tst_info, 1)) | |
611 | goto end; | |
612 | if (!TS_TST_INFO_set_policy_id(tst_info, policy)) | |
613 | goto end; | |
614 | if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint)) | |
615 | goto end; | |
616 | if (!(serial = (*ctx->serial_cb) (ctx, ctx->serial_cb_data)) | |
617 | || !TS_TST_INFO_set_serial(tst_info, serial)) | |
618 | goto end; | |
619 | if (!(*ctx->time_cb) (ctx, ctx->time_cb_data, &sec, &usec) | |
620 | || !(asn1_time = TS_RESP_set_genTime_with_precision(NULL, | |
621 | sec, usec, | |
622 | ctx->clock_precision_digits)) | |
623 | || !TS_TST_INFO_set_time(tst_info, asn1_time)) | |
624 | goto end; | |
625 | ||
626 | /* Setting accuracy if needed. */ | |
627 | if ((ctx->seconds || ctx->millis || ctx->micros) | |
628 | && !(accuracy = TS_ACCURACY_new())) | |
629 | goto end; | |
630 | ||
631 | if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds)) | |
632 | goto end; | |
633 | if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis)) | |
634 | goto end; | |
635 | if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros)) | |
636 | goto end; | |
637 | if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy)) | |
638 | goto end; | |
639 | ||
640 | /* Setting ordering. */ | |
641 | if ((ctx->flags & TS_ORDERING) | |
642 | && !TS_TST_INFO_set_ordering(tst_info, 1)) | |
643 | goto end; | |
644 | ||
645 | /* Setting nonce if needed. */ | |
646 | if ((nonce = TS_REQ_get_nonce(ctx->request)) != NULL | |
647 | && !TS_TST_INFO_set_nonce(tst_info, nonce)) | |
648 | goto end; | |
649 | ||
650 | /* Setting TSA name to subject of signer certificate. */ | |
651 | if (ctx->flags & TS_TSA_NAME) { | |
652 | if (!(tsa_name = GENERAL_NAME_new())) | |
653 | goto end; | |
654 | tsa_name->type = GEN_DIRNAME; | |
655 | tsa_name->d.dirn = | |
656 | X509_NAME_dup(ctx->signer_cert->cert_info->subject); | |
657 | if (!tsa_name->d.dirn) | |
658 | goto end; | |
659 | if (!TS_TST_INFO_set_tsa(tst_info, tsa_name)) | |
660 | goto end; | |
661 | } | |
662 | ||
663 | result = 1; | |
c7235be6 | 664 | end: |
0f113f3e MC |
665 | if (!result) { |
666 | TS_TST_INFO_free(tst_info); | |
667 | tst_info = NULL; | |
668 | TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR); | |
669 | TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION, | |
670 | "Error during TSTInfo " | |
671 | "generation."); | |
672 | } | |
673 | GENERAL_NAME_free(tsa_name); | |
674 | TS_ACCURACY_free(accuracy); | |
675 | ASN1_GENERALIZEDTIME_free(asn1_time); | |
676 | ASN1_INTEGER_free(serial); | |
677 | ||
678 | return tst_info; | |
679 | } | |
c7235be6 UM |
680 | |
681 | /* Processing the extensions of the request. */ | |
682 | static int TS_RESP_process_extensions(TS_RESP_CTX *ctx) | |
0f113f3e MC |
683 | { |
684 | STACK_OF(X509_EXTENSION) *exts = TS_REQ_get_exts(ctx->request); | |
685 | int i; | |
686 | int ok = 1; | |
687 | ||
688 | for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i) { | |
689 | X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i); | |
690 | /* | |
691 | * XXXXX The last argument was previously (void *)ctx->extension_cb, | |
692 | * but ISO C doesn't permit converting a function pointer to void *. | |
693 | * For lack of better information, I'm placing a NULL there instead. | |
694 | * The callback can pick its own address out from the ctx anyway... | |
695 | */ | |
696 | ok = (*ctx->extension_cb) (ctx, ext, NULL); | |
697 | } | |
698 | ||
699 | return ok; | |
700 | } | |
c7235be6 UM |
701 | |
702 | /* Functions for signing the TS_TST_INFO structure of the context. */ | |
703 | static int TS_RESP_sign(TS_RESP_CTX *ctx) | |
0f113f3e MC |
704 | { |
705 | int ret = 0; | |
706 | PKCS7 *p7 = NULL; | |
707 | PKCS7_SIGNER_INFO *si; | |
708 | STACK_OF(X509) *certs; /* Certificates to include in sc. */ | |
709 | ESS_SIGNING_CERT *sc = NULL; | |
710 | ASN1_OBJECT *oid; | |
711 | BIO *p7bio = NULL; | |
712 | int i; | |
713 | ||
714 | /* Check if signcert and pkey match. */ | |
715 | if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) { | |
716 | TSerr(TS_F_TS_RESP_SIGN, TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); | |
717 | goto err; | |
718 | } | |
719 | ||
720 | /* Create a new PKCS7 signed object. */ | |
721 | if (!(p7 = PKCS7_new())) { | |
722 | TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE); | |
723 | goto err; | |
724 | } | |
725 | if (!PKCS7_set_type(p7, NID_pkcs7_signed)) | |
726 | goto err; | |
727 | ||
728 | /* Force SignedData version to be 3 instead of the default 1. */ | |
729 | if (!ASN1_INTEGER_set(p7->d.sign->version, 3)) | |
730 | goto err; | |
731 | ||
732 | /* Add signer certificate and optional certificate chain. */ | |
733 | if (TS_REQ_get_cert_req(ctx->request)) { | |
734 | PKCS7_add_certificate(p7, ctx->signer_cert); | |
735 | if (ctx->certs) { | |
736 | for (i = 0; i < sk_X509_num(ctx->certs); ++i) { | |
737 | X509 *cert = sk_X509_value(ctx->certs, i); | |
738 | PKCS7_add_certificate(p7, cert); | |
739 | } | |
740 | } | |
741 | } | |
742 | ||
743 | /* Add a new signer info. */ | |
744 | if (!(si = PKCS7_add_signature(p7, ctx->signer_cert, | |
745 | ctx->signer_key, EVP_sha1()))) { | |
746 | TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR); | |
747 | goto err; | |
748 | } | |
749 | ||
750 | /* Add content type signed attribute to the signer info. */ | |
751 | oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo); | |
752 | if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType, | |
753 | V_ASN1_OBJECT, oid)) { | |
754 | TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR); | |
755 | goto err; | |
756 | } | |
757 | ||
758 | /* | |
759 | * Create the ESS SigningCertificate attribute which contains the signer | |
760 | * certificate id and optionally the certificate chain. | |
761 | */ | |
762 | certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL; | |
763 | if (!(sc = ESS_SIGNING_CERT_new_init(ctx->signer_cert, certs))) | |
764 | goto err; | |
765 | ||
766 | /* Add SigningCertificate signed attribute to the signer info. */ | |
767 | if (!ESS_add_signing_cert(si, sc)) { | |
768 | TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR); | |
769 | goto err; | |
770 | } | |
771 | ||
772 | /* Add a new empty NID_id_smime_ct_TSTInfo encapsulated content. */ | |
773 | if (!TS_TST_INFO_content_new(p7)) | |
774 | goto err; | |
775 | ||
776 | /* Add the DER encoded tst_info to the PKCS7 structure. */ | |
777 | if (!(p7bio = PKCS7_dataInit(p7, NULL))) { | |
778 | TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE); | |
779 | goto err; | |
780 | } | |
781 | ||
782 | /* Convert tst_info to DER. */ | |
783 | if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info)) { | |
784 | TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN); | |
785 | goto err; | |
786 | } | |
787 | ||
788 | /* Create the signature and add it to the signer info. */ | |
789 | if (!PKCS7_dataFinal(p7, p7bio)) { | |
790 | TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN); | |
791 | goto err; | |
792 | } | |
793 | ||
794 | /* Set new PKCS7 and TST_INFO objects. */ | |
795 | TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info); | |
796 | p7 = NULL; /* Ownership is lost. */ | |
797 | ctx->tst_info = NULL; /* Ownership is lost. */ | |
798 | ||
799 | ret = 1; | |
c7235be6 | 800 | err: |
0f113f3e MC |
801 | if (!ret) |
802 | TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION, | |
803 | "Error during signature " | |
804 | "generation."); | |
805 | BIO_free_all(p7bio); | |
806 | ESS_SIGNING_CERT_free(sc); | |
807 | PKCS7_free(p7); | |
808 | return ret; | |
809 | } | |
810 | ||
811 | static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert, | |
812 | STACK_OF(X509) *certs) | |
813 | { | |
814 | ESS_CERT_ID *cid; | |
815 | ESS_SIGNING_CERT *sc = NULL; | |
816 | int i; | |
817 | ||
818 | /* Creating the ESS_CERT_ID stack. */ | |
819 | if (!(sc = ESS_SIGNING_CERT_new())) | |
820 | goto err; | |
821 | if (!sc->cert_ids && !(sc->cert_ids = sk_ESS_CERT_ID_new_null())) | |
822 | goto err; | |
823 | ||
824 | /* Adding the signing certificate id. */ | |
825 | if (!(cid = ESS_CERT_ID_new_init(signcert, 0)) | |
826 | || !sk_ESS_CERT_ID_push(sc->cert_ids, cid)) | |
827 | goto err; | |
828 | /* Adding the certificate chain ids. */ | |
829 | for (i = 0; i < sk_X509_num(certs); ++i) { | |
830 | X509 *cert = sk_X509_value(certs, i); | |
831 | if (!(cid = ESS_CERT_ID_new_init(cert, 1)) | |
832 | || !sk_ESS_CERT_ID_push(sc->cert_ids, cid)) | |
833 | goto err; | |
834 | } | |
835 | ||
836 | return sc; | |
837 | err: | |
838 | ESS_SIGNING_CERT_free(sc); | |
839 | TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE); | |
840 | return NULL; | |
841 | } | |
c7235be6 UM |
842 | |
843 | static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed) | |
0f113f3e MC |
844 | { |
845 | ESS_CERT_ID *cid = NULL; | |
846 | GENERAL_NAME *name = NULL; | |
847 | ||
848 | /* Recompute SHA1 hash of certificate if necessary (side effect). */ | |
849 | X509_check_purpose(cert, -1, 0); | |
850 | ||
851 | if (!(cid = ESS_CERT_ID_new())) | |
852 | goto err; | |
853 | if (!ASN1_OCTET_STRING_set(cid->hash, cert->sha1_hash, | |
854 | sizeof(cert->sha1_hash))) | |
855 | goto err; | |
856 | ||
857 | /* Setting the issuer/serial if requested. */ | |
858 | if (issuer_needed) { | |
859 | /* Creating issuer/serial structure. */ | |
860 | if (!cid->issuer_serial | |
861 | && !(cid->issuer_serial = ESS_ISSUER_SERIAL_new())) | |
862 | goto err; | |
863 | /* Creating general name from the certificate issuer. */ | |
864 | if (!(name = GENERAL_NAME_new())) | |
865 | goto err; | |
866 | name->type = GEN_DIRNAME; | |
867 | if (!(name->d.dirn = X509_NAME_dup(cert->cert_info->issuer))) | |
868 | goto err; | |
869 | if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name)) | |
870 | goto err; | |
871 | name = NULL; /* Ownership is lost. */ | |
872 | /* Setting the serial number. */ | |
873 | ASN1_INTEGER_free(cid->issuer_serial->serial); | |
874 | if (!(cid->issuer_serial->serial = | |
875 | ASN1_INTEGER_dup(cert->cert_info->serialNumber))) | |
876 | goto err; | |
877 | } | |
878 | ||
879 | return cid; | |
880 | err: | |
881 | GENERAL_NAME_free(name); | |
882 | ESS_CERT_ID_free(cid); | |
883 | TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE); | |
884 | return NULL; | |
885 | } | |
c7235be6 UM |
886 | |
887 | static int TS_TST_INFO_content_new(PKCS7 *p7) | |
0f113f3e MC |
888 | { |
889 | PKCS7 *ret = NULL; | |
890 | ASN1_OCTET_STRING *octet_string = NULL; | |
891 | ||
892 | /* Create new encapsulated NID_id_smime_ct_TSTInfo content. */ | |
893 | if (!(ret = PKCS7_new())) | |
894 | goto err; | |
895 | if (!(ret->d.other = ASN1_TYPE_new())) | |
896 | goto err; | |
897 | ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo); | |
898 | if (!(octet_string = ASN1_OCTET_STRING_new())) | |
899 | goto err; | |
900 | ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string); | |
901 | octet_string = NULL; | |
902 | ||
903 | /* Add encapsulated content to signed PKCS7 structure. */ | |
904 | if (!PKCS7_set_content(p7, ret)) | |
905 | goto err; | |
906 | ||
907 | return 1; | |
c7235be6 | 908 | err: |
0f113f3e MC |
909 | ASN1_OCTET_STRING_free(octet_string); |
910 | PKCS7_free(ret); | |
911 | return 0; | |
912 | } | |
c7235be6 UM |
913 | |
914 | static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc) | |
0f113f3e MC |
915 | { |
916 | ASN1_STRING *seq = NULL; | |
917 | unsigned char *p, *pp = NULL; | |
918 | int len; | |
919 | ||
920 | len = i2d_ESS_SIGNING_CERT(sc, NULL); | |
b196e7d9 | 921 | if (!(pp = OPENSSL_malloc(len))) { |
0f113f3e MC |
922 | TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE); |
923 | goto err; | |
924 | } | |
925 | p = pp; | |
926 | i2d_ESS_SIGNING_CERT(sc, &p); | |
927 | if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len)) { | |
928 | TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE); | |
929 | goto err; | |
930 | } | |
931 | OPENSSL_free(pp); | |
932 | pp = NULL; | |
933 | return PKCS7_add_signed_attribute(si, | |
934 | NID_id_smime_aa_signingCertificate, | |
935 | V_ASN1_SEQUENCE, seq); | |
c7235be6 | 936 | err: |
0f113f3e MC |
937 | ASN1_STRING_free(seq); |
938 | OPENSSL_free(pp); | |
939 | ||
940 | return 0; | |
941 | } | |
942 | ||
943 | static ASN1_GENERALIZEDTIME | |
944 | *TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *asn1_time, | |
945 | long sec, long usec, unsigned precision) | |
946 | { | |
947 | time_t time_sec = (time_t)sec; | |
948 | struct tm *tm = NULL; | |
949 | char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS]; | |
950 | char *p = genTime_str; | |
951 | char *p_end = genTime_str + sizeof(genTime_str); | |
952 | ||
953 | if (precision > TS_MAX_CLOCK_PRECISION_DIGITS) | |
954 | goto err; | |
955 | ||
956 | if (!(tm = gmtime(&time_sec))) | |
957 | goto err; | |
958 | ||
959 | /* | |
960 | * Put "genTime_str" in GeneralizedTime format. We work around the | |
961 | * restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST | |
962 | * NOT include fractional seconds") and OpenSSL related functions to | |
963 | * meet the rfc3161 requirement: "GeneralizedTime syntax can include | |
964 | * fraction-of-second details". | |
965 | */ | |
966 | p += BIO_snprintf(p, p_end - p, | |
967 | "%04d%02d%02d%02d%02d%02d", | |
968 | tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, | |
969 | tm->tm_hour, tm->tm_min, tm->tm_sec); | |
970 | if (precision > 0) { | |
971 | /* Add fraction of seconds (leave space for dot and null). */ | |
972 | BIO_snprintf(p, 2 + precision, ".%06ld", usec); | |
973 | /* | |
974 | * We cannot use the snprintf return value, because it might have | |
975 | * been truncated. | |
976 | */ | |
977 | p += strlen(p); | |
978 | ||
979 | /* | |
980 | * To make things a bit harder, X.690 | ISO/IEC 8825-1 provides the | |
981 | * following restrictions for a DER-encoding, which OpenSSL | |
982 | * (specifically ASN1_GENERALIZEDTIME_check() function) doesn't | |
983 | * support: "The encoding MUST terminate with a "Z" (which means | |
984 | * "Zulu" time). The decimal point element, if present, MUST be the | |
985 | * point option ".". The fractional-seconds elements, if present, | |
986 | * MUST omit all trailing 0's; if the elements correspond to 0, they | |
987 | * MUST be wholly omitted, and the decimal point element also MUST be | |
988 | * omitted." | |
989 | */ | |
990 | /* | |
991 | * Remove trailing zeros. The dot guarantees the exit condition of | |
992 | * this loop even if all the digits are zero. | |
993 | */ | |
994 | while (*--p == '0') | |
995 | /* | |
996 | * empty | |
997 | */ ; | |
998 | /* p points to either the dot or the last non-zero digit. */ | |
999 | if (*p != '.') | |
1000 | ++p; | |
1001 | } | |
1002 | /* Add the trailing Z and the terminating null. */ | |
1003 | *p++ = 'Z'; | |
1004 | *p++ = '\0'; | |
1005 | ||
1006 | /* Now call OpenSSL to check and set our genTime value */ | |
f422a514 | 1007 | if (!asn1_time && !(asn1_time = ASN1_GENERALIZEDTIME_new())) |
0f113f3e MC |
1008 | goto err; |
1009 | if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str)) { | |
1010 | ASN1_GENERALIZEDTIME_free(asn1_time); | |
1011 | goto err; | |
1012 | } | |
1013 | ||
1014 | return asn1_time; | |
c7235be6 | 1015 | err: |
0f113f3e MC |
1016 | TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME); |
1017 | return NULL; | |
1018 | } |