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1/* $OpenBSD: ts.c,v 1.1 2014/08/26 17:47:25 jsing Exp $ */
2/* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL
3 * project 2002.
4 */
5/* ====================================================================
6 * Copyright (c) 2001 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62
63#include "apps.h"
64
65#include <openssl/bio.h>
66#include <openssl/bn.h>
67#include <openssl/err.h>
68#include <openssl/pem.h>
69#include <openssl/rand.h>
70#include <openssl/ts.h>
71
72/* Length of the nonce of the request in bits (must be a multiple of 8). */
73#define NONCE_LENGTH 64
74
75/* Macro definitions for the configuration file. */
76#define ENV_OID_FILE "oid_file"
77
78/* Local function declarations. */
79
80static ASN1_OBJECT *txt2obj(const char *oid);
81static CONF *load_config_file(const char *configfile);
82
83/* Query related functions. */
84static int query_command(const char *data, char *digest,
85 const EVP_MD * md, const char *policy, int no_nonce,
86 int cert, const char *in, const char *out, int text);
87static BIO *BIO_open_with_default(const char *file, const char *mode,
88 FILE * default_fp);
89static TS_REQ *create_query(BIO * data_bio, char *digest, const EVP_MD * md,
90 const char *policy, int no_nonce, int cert);
91static int create_digest(BIO * input, char *digest,
92 const EVP_MD * md, unsigned char **md_value);
93static ASN1_INTEGER *create_nonce(int bits);
94
95/* Reply related functions. */
96static int reply_command(CONF * conf, char *section, char *engine,
97 char *queryfile, char *passin, char *inkey,
98 char *signer, char *chain, const char *policy,
99 char *in, int token_in, char *out, int token_out,
100 int text);
101static TS_RESP *read_PKCS7(BIO * in_bio);
102static TS_RESP *create_response(CONF * conf, const char *section, char *engine,
103 char *queryfile, char *passin, char *inkey,
104 char *signer, char *chain, const char *policy);
105static ASN1_INTEGER *serial_cb(TS_RESP_CTX * ctx, void *data);
106static ASN1_INTEGER *next_serial(const char *serialfile);
107static int save_ts_serial(const char *serialfile, ASN1_INTEGER * serial);
108
109/* Verify related functions. */
110static int verify_command(char *data, char *digest, char *queryfile,
111 char *in, int token_in,
112 char *ca_path, char *ca_file, char *untrusted);
113static TS_VERIFY_CTX *create_verify_ctx(char *data, char *digest,
114 char *queryfile,
115 char *ca_path, char *ca_file,
116 char *untrusted);
117static X509_STORE *create_cert_store(char *ca_path, char *ca_file);
118static int verify_cb(int ok, X509_STORE_CTX * ctx);
119
120/* Main function definition. */
121int ts_main(int, char **);
122
123int
124ts_main(int argc, char **argv)
125{
126 int ret = 1;
127 char *configfile = NULL;
128 char *section = NULL;
129 CONF *conf = NULL;
130 enum mode {
131 CMD_NONE, CMD_QUERY, CMD_REPLY, CMD_VERIFY
132 } mode = CMD_NONE;
133 char *data = NULL;
134 char *digest = NULL;
135 const EVP_MD *md = NULL;
136 char *policy = NULL;
137 int no_nonce = 0;
138 int cert = 0;
139 char *in = NULL;
140 char *out = NULL;
141 int text = 0;
142 char *queryfile = NULL;
143 char *passin = NULL; /* Password source. */
144 char *password = NULL; /* Password itself. */
145 char *inkey = NULL;
146 char *signer = NULL;
147 char *chain = NULL;
148 char *ca_path = NULL;
149 char *ca_file = NULL;
150 char *untrusted = NULL;
151 char *engine = NULL;
152 /* Input is ContentInfo instead of TimeStampResp. */
153 int token_in = 0;
154 /* Output is ContentInfo instead of TimeStampResp. */
155 int token_out = 0;
156
157 ERR_load_crypto_strings();
158
159 for (argc--, argv++; argc > 0; argc--, argv++) {
160 if (strcmp(*argv, "-config") == 0) {
161 if (argc-- < 1)
162 goto usage;
163 configfile = *++argv;
164 } else if (strcmp(*argv, "-section") == 0) {
165 if (argc-- < 1)
166 goto usage;
167 section = *++argv;
168 } else if (strcmp(*argv, "-query") == 0) {
169 if (mode != CMD_NONE)
170 goto usage;
171 mode = CMD_QUERY;
172 } else if (strcmp(*argv, "-data") == 0) {
173 if (argc-- < 1)
174 goto usage;
175 data = *++argv;
176 } else if (strcmp(*argv, "-digest") == 0) {
177 if (argc-- < 1)
178 goto usage;
179 digest = *++argv;
180 } else if (strcmp(*argv, "-policy") == 0) {
181 if (argc-- < 1)
182 goto usage;
183 policy = *++argv;
184 } else if (strcmp(*argv, "-no_nonce") == 0) {
185 no_nonce = 1;
186 } else if (strcmp(*argv, "-cert") == 0) {
187 cert = 1;
188 } else if (strcmp(*argv, "-in") == 0) {
189 if (argc-- < 1)
190 goto usage;
191 in = *++argv;
192 } else if (strcmp(*argv, "-token_in") == 0) {
193 token_in = 1;
194 } else if (strcmp(*argv, "-out") == 0) {
195 if (argc-- < 1)
196 goto usage;
197 out = *++argv;
198 } else if (strcmp(*argv, "-token_out") == 0) {
199 token_out = 1;
200 } else if (strcmp(*argv, "-text") == 0) {
201 text = 1;
202 } else if (strcmp(*argv, "-reply") == 0) {
203 if (mode != CMD_NONE)
204 goto usage;
205 mode = CMD_REPLY;
206 } else if (strcmp(*argv, "-queryfile") == 0) {
207 if (argc-- < 1)
208 goto usage;
209 queryfile = *++argv;
210 } else if (strcmp(*argv, "-passin") == 0) {
211 if (argc-- < 1)
212 goto usage;
213 passin = *++argv;
214 } else if (strcmp(*argv, "-inkey") == 0) {
215 if (argc-- < 1)
216 goto usage;
217 inkey = *++argv;
218 } else if (strcmp(*argv, "-signer") == 0) {
219 if (argc-- < 1)
220 goto usage;
221 signer = *++argv;
222 } else if (strcmp(*argv, "-chain") == 0) {
223 if (argc-- < 1)
224 goto usage;
225 chain = *++argv;
226 } else if (strcmp(*argv, "-verify") == 0) {
227 if (mode != CMD_NONE)
228 goto usage;
229 mode = CMD_VERIFY;
230 } else if (strcmp(*argv, "-CApath") == 0) {
231 if (argc-- < 1)
232 goto usage;
233 ca_path = *++argv;
234 } else if (strcmp(*argv, "-CAfile") == 0) {
235 if (argc-- < 1)
236 goto usage;
237 ca_file = *++argv;
238 } else if (strcmp(*argv, "-untrusted") == 0) {
239 if (argc-- < 1)
240 goto usage;
241 untrusted = *++argv;
242 } else if (strcmp(*argv, "-engine") == 0) {
243 if (argc-- < 1)
244 goto usage;
245 engine = *++argv;
246 } else if ((md = EVP_get_digestbyname(*argv + 1)) != NULL) {
247 /* empty. */
248 } else
249 goto usage;
250 }
251
252 /* Get the password if required. */
253 if (mode == CMD_REPLY && passin &&
254 !app_passwd(bio_err, passin, NULL, &password, NULL)) {
255 BIO_printf(bio_err, "Error getting password.\n");
256 goto cleanup;
257 }
258 /*
259 * Check consistency of parameters and execute the appropriate
260 * function.
261 */
262 switch (mode) {
263 case CMD_NONE:
264 goto usage;
265 case CMD_QUERY:
266 /*
267 * Data file and message imprint cannot be specified at the
268 * same time.
269 */
270 ret = data != NULL && digest != NULL;
271 if (ret)
272 goto usage;
273 /* Load the config file for possible policy OIDs. */
274 conf = load_config_file(configfile);
275 ret = !query_command(data, digest, md, policy, no_nonce, cert,
276 in, out, text);
277 break;
278 case CMD_REPLY:
279 conf = load_config_file(configfile);
280 if (in == NULL) {
281 ret = !(queryfile != NULL && conf != NULL && !token_in);
282 if (ret)
283 goto usage;
284 } else {
285 /* 'in' and 'queryfile' are exclusive. */
286 ret = !(queryfile == NULL);
287 if (ret)
288 goto usage;
289 }
290
291 ret = !reply_command(conf, section, engine, queryfile,
292 password, inkey, signer, chain, policy,
293 in, token_in, out, token_out, text);
294 break;
295 case CMD_VERIFY:
296 ret = !(((queryfile && !data && !digest) ||
297 (!queryfile && data && !digest) ||
298 (!queryfile && !data && digest)) && in != NULL);
299 if (ret)
300 goto usage;
301
302 ret = !verify_command(data, digest, queryfile, in, token_in,
303 ca_path, ca_file, untrusted);
304 }
305
306 goto cleanup;
307
308usage:
309 BIO_printf(bio_err, "usage:\n"
310 "ts -query [-config configfile] "
311 "[-data file_to_hash] [-digest digest_bytes]"
312 "[-md2|-md4|-md5|-sha|-sha1|-mdc2|-ripemd160] "
313 "[-policy object_id] [-no_nonce] [-cert] "
314 "[-in request.tsq] [-out request.tsq] [-text]\n");
315 BIO_printf(bio_err, "or\n"
316 "ts -reply [-config configfile] [-section tsa_section] "
317 "[-queryfile request.tsq] [-passin password] "
318 "[-signer tsa_cert.pem] [-inkey private_key.pem] "
319 "[-chain certs_file.pem] [-policy object_id] "
320 "[-in response.tsr] [-token_in] "
321 "[-out response.tsr] [-token_out] [-text] [-engine id]\n");
322 BIO_printf(bio_err, "or\n"
323 "ts -verify [-data file_to_hash] [-digest digest_bytes] "
324 "[-queryfile request.tsq] "
325 "-in response.tsr [-token_in] "
326 "-CApath ca_path -CAfile ca_file.pem "
327 "-untrusted cert_file.pem\n");
328
329cleanup:
330 /* Clean up. */
331 NCONF_free(conf);
332 free(password);
333 OBJ_cleanup();
334
335 return (ret);
336}
337
338/*
339 * Configuration file-related function definitions.
340 */
341
342static ASN1_OBJECT *
343txt2obj(const char *oid)
344{
345 ASN1_OBJECT *oid_obj = NULL;
346
347 if (!(oid_obj = OBJ_txt2obj(oid, 0)))
348 BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
349
350 return oid_obj;
351}
352
353static CONF *
354load_config_file(const char *configfile)
355{
356 CONF *conf = NULL;
357 long errorline = -1;
358
359 if (!configfile)
360 configfile = getenv("OPENSSL_CONF");
361 if (!configfile)
362 configfile = getenv("SSLEAY_CONF");
363
364 if (configfile &&
365 (!(conf = NCONF_new(NULL)) ||
366 NCONF_load(conf, configfile, &errorline) <= 0)) {
367 if (errorline <= 0)
368 BIO_printf(bio_err, "error loading the config file "
369 "'%s'\n", configfile);
370 else
371 BIO_printf(bio_err, "error on line %ld of config file "
372 "'%s'\n", errorline, configfile);
373 }
374 if (conf != NULL) {
375 const char *p;
376
377 BIO_printf(bio_err, "Using configuration from %s\n",
378 configfile);
379 p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
380 if (p != NULL) {
381 BIO *oid_bio = BIO_new_file(p, "r");
382 if (!oid_bio)
383 ERR_print_errors(bio_err);
384 else {
385 OBJ_create_objects(oid_bio);
386 BIO_free_all(oid_bio);
387 }
388 } else
389 ERR_clear_error();
390 if (!add_oid_section(bio_err, conf))
391 ERR_print_errors(bio_err);
392 }
393 return conf;
394}
395
396/*
397 * Query-related method definitions.
398 */
399
400static int
401query_command(const char *data, char *digest, const EVP_MD * md,
402 const char *policy, int no_nonce, int cert, const char *in,
403 const char *out, int text)
404{
405 int ret = 0;
406 TS_REQ *query = NULL;
407 BIO *in_bio = NULL;
408 BIO *data_bio = NULL;
409 BIO *out_bio = NULL;
410
411 /* Build query object either from file or from scratch. */
412 if (in != NULL) {
413 if ((in_bio = BIO_new_file(in, "rb")) == NULL)
414 goto end;
415 query = d2i_TS_REQ_bio(in_bio, NULL);
416 } else {
417 /* Open the file if no explicit digest bytes were specified. */
418 if (!digest &&
419 !(data_bio = BIO_open_with_default(data, "rb", stdin)))
420 goto end;
421 /* Creating the query object. */
422 query = create_query(data_bio, digest, md,
423 policy, no_nonce, cert);
424 /* Saving the random number generator state. */
425 }
426 if (query == NULL)
427 goto end;
428
429 /* Write query either in ASN.1 or in text format. */
430 if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
431 goto end;
432 if (text) {
433 /* Text output. */
434 if (!TS_REQ_print_bio(out_bio, query))
435 goto end;
436 } else {
437 /* ASN.1 output. */
438 if (!i2d_TS_REQ_bio(out_bio, query))
439 goto end;
440 }
441
442 ret = 1;
443
444end:
445 ERR_print_errors(bio_err);
446
447 /* Clean up. */
448 BIO_free_all(in_bio);
449 BIO_free_all(data_bio);
450 BIO_free_all(out_bio);
451 TS_REQ_free(query);
452
453 return ret;
454}
455
456static BIO *
457BIO_open_with_default(const char *file, const char *mode, FILE * default_fp)
458{
459 return file == NULL ? BIO_new_fp(default_fp, BIO_NOCLOSE) :
460 BIO_new_file(file, mode);
461}
462
463static TS_REQ *
464create_query(BIO * data_bio, char *digest, const EVP_MD * md,
465 const char *policy, int no_nonce, int cert)
466{
467 int ret = 0;
468 TS_REQ *ts_req = NULL;
469 int len;
470 TS_MSG_IMPRINT *msg_imprint = NULL;
471 X509_ALGOR *algo = NULL;
472 unsigned char *data = NULL;
473 ASN1_OBJECT *policy_obj = NULL;
474 ASN1_INTEGER *nonce_asn1 = NULL;
475
476 /* Setting default message digest. */
477 if (!md && !(md = EVP_get_digestbyname("sha1")))
478 goto err;
479
480 /* Creating request object. */
481 if (!(ts_req = TS_REQ_new()))
482 goto err;
483
484 /* Setting version. */
485 if (!TS_REQ_set_version(ts_req, 1))
486 goto err;
487
488 /* Creating and adding MSG_IMPRINT object. */
489 if (!(msg_imprint = TS_MSG_IMPRINT_new()))
490 goto err;
491
492 /* Adding algorithm. */
493 if (!(algo = X509_ALGOR_new()))
494 goto err;
495 if (!(algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))))
496 goto err;
497 if (!(algo->parameter = ASN1_TYPE_new()))
498 goto err;
499 algo->parameter->type = V_ASN1_NULL;
500 if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
501 goto err;
502
503 /* Adding message digest. */
504 if ((len = create_digest(data_bio, digest, md, &data)) == 0)
505 goto err;
506 if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
507 goto err;
508
509 if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
510 goto err;
511
512 /* Setting policy if requested. */
513 if (policy && !(policy_obj = txt2obj(policy)))
514 goto err;
515 if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
516 goto err;
517
518 /* Setting nonce if requested. */
519 if (!no_nonce && !(nonce_asn1 = create_nonce(NONCE_LENGTH)))
520 goto err;
521 if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
522 goto err;
523
524 /* Setting certificate request flag if requested. */
525 if (!TS_REQ_set_cert_req(ts_req, cert))
526 goto err;
527
528 ret = 1;
529
530err:
531 if (!ret) {
532 TS_REQ_free(ts_req);
533 ts_req = NULL;
534 BIO_printf(bio_err, "could not create query\n");
535 }
536 TS_MSG_IMPRINT_free(msg_imprint);
537 X509_ALGOR_free(algo);
538 free(data);
539 ASN1_OBJECT_free(policy_obj);
540 ASN1_INTEGER_free(nonce_asn1);
541
542 return ts_req;
543}
544
545static int
546create_digest(BIO * input, char *digest, const EVP_MD * md,
547 unsigned char **md_value)
548{
549 int md_value_len;
550
551 md_value_len = EVP_MD_size(md);
552 if (md_value_len < 0)
553 goto err;
554 if (input) {
555 /* Digest must be computed from an input file. */
556 EVP_MD_CTX md_ctx;
557 unsigned char buffer[4096];
558 int length;
559
560 *md_value = malloc(md_value_len);
561 if (*md_value == 0)
562 goto err;
563
564 EVP_DigestInit(&md_ctx, md);
565 while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
566 EVP_DigestUpdate(&md_ctx, buffer, length);
567 }
568 EVP_DigestFinal(&md_ctx, *md_value, NULL);
569 } else {
570 /* Digest bytes are specified with digest. */
571 long digest_len;
572 *md_value = string_to_hex(digest, &digest_len);
573 if (!*md_value || md_value_len != digest_len) {
574 free(*md_value);
575 *md_value = NULL;
576 BIO_printf(bio_err, "bad digest, %d bytes "
577 "must be specified\n", md_value_len);
578 goto err;
579 }
580 }
581
582 return md_value_len;
583err:
584 return 0;
585}
586
587static ASN1_INTEGER *
588create_nonce(int bits)
589{
590 unsigned char buf[20];
591 ASN1_INTEGER *nonce = NULL;
592 int len = (bits - 1) / 8 + 1;
593 int i;
594
595 /* Generating random byte sequence. */
596 if (len > (int) sizeof(buf))
597 goto err;
598 if (RAND_bytes(buf, len) <= 0)
599 goto err;
600
601 /* Find the first non-zero byte and creating ASN1_INTEGER object. */
602 for (i = 0; i < len && !buf[i]; ++i)
603 ;
604 if (!(nonce = ASN1_INTEGER_new()))
605 goto err;
606 free(nonce->data);
607 /* Allocate at least one byte. */
608 nonce->length = len - i;
609 if (!(nonce->data = malloc(nonce->length + 1)))
610 goto err;
611 memcpy(nonce->data, buf + i, nonce->length);
612
613 return nonce;
614
615err:
616 BIO_printf(bio_err, "could not create nonce\n");
617 ASN1_INTEGER_free(nonce);
618 return NULL;
619}
620/*
621 * Reply-related method definitions.
622 */
623
624static int
625reply_command(CONF * conf, char *section, char *engine, char *queryfile,
626 char *passin, char *inkey, char *signer, char *chain, const char *policy,
627 char *in, int token_in, char *out, int token_out, int text)
628{
629 int ret = 0;
630 TS_RESP *response = NULL;
631 BIO *in_bio = NULL;
632 BIO *query_bio = NULL;
633 BIO *inkey_bio = NULL;
634 BIO *signer_bio = NULL;
635 BIO *out_bio = NULL;
636
637 /* Build response object either from response or query. */
638 if (in != NULL) {
639 if ((in_bio = BIO_new_file(in, "rb")) == NULL)
640 goto end;
641 if (token_in) {
642 /*
643 * We have a ContentInfo (PKCS7) object, add
644 * 'granted' status info around it.
645 */
646 response = read_PKCS7(in_bio);
647 } else {
648 /* We have a ready-made TS_RESP object. */
649 response = d2i_TS_RESP_bio(in_bio, NULL);
650 }
651 } else {
652 response = create_response(conf, section, engine, queryfile,
653 passin, inkey, signer, chain,
654 policy);
655 if (response)
656 BIO_printf(bio_err, "Response has been generated.\n");
657 else
658 BIO_printf(bio_err, "Response is not generated.\n");
659 }
660 if (response == NULL)
661 goto end;
662
663 /* Write response either in ASN.1 or text format. */
664 if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
665 goto end;
666 if (text) {
667 /* Text output. */
668 if (token_out) {
669 TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
670 if (!TS_TST_INFO_print_bio(out_bio, tst_info))
671 goto end;
672 } else {
673 if (!TS_RESP_print_bio(out_bio, response))
674 goto end;
675 }
676 } else {
677 /* ASN.1 DER output. */
678 if (token_out) {
679 PKCS7 *token = TS_RESP_get_token(response);
680 if (!i2d_PKCS7_bio(out_bio, token))
681 goto end;
682 } else {
683 if (!i2d_TS_RESP_bio(out_bio, response))
684 goto end;
685 }
686 }
687
688 ret = 1;
689
690end:
691 ERR_print_errors(bio_err);
692
693 /* Clean up. */
694 BIO_free_all(in_bio);
695 BIO_free_all(query_bio);
696 BIO_free_all(inkey_bio);
697 BIO_free_all(signer_bio);
698 BIO_free_all(out_bio);
699 TS_RESP_free(response);
700
701 return ret;
702}
703
704/* Reads a PKCS7 token and adds default 'granted' status info to it. */
705static TS_RESP *
706read_PKCS7(BIO * in_bio)
707{
708 int ret = 0;
709 PKCS7 *token = NULL;
710 TS_TST_INFO *tst_info = NULL;
711 TS_RESP *resp = NULL;
712 TS_STATUS_INFO *si = NULL;
713
714 /* Read PKCS7 object and extract the signed time stamp info. */
715 if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
716 goto end;
717 if (!(tst_info = PKCS7_to_TS_TST_INFO(token)))
718 goto end;
719
720 /* Creating response object. */
721 if (!(resp = TS_RESP_new()))
722 goto end;
723
724 /* Create granted status info. */
725 if (!(si = TS_STATUS_INFO_new()))
726 goto end;
727 if (!(ASN1_INTEGER_set(si->status, TS_STATUS_GRANTED)))
728 goto end;
729 if (!TS_RESP_set_status_info(resp, si))
730 goto end;
731
732 /* Setting encapsulated token. */
733 TS_RESP_set_tst_info(resp, token, tst_info);
734 token = NULL; /* Ownership is lost. */
735 tst_info = NULL; /* Ownership is lost. */
736
737 ret = 1;
738end:
739 PKCS7_free(token);
740 TS_TST_INFO_free(tst_info);
741 if (!ret) {
742 TS_RESP_free(resp);
743 resp = NULL;
744 }
745 TS_STATUS_INFO_free(si);
746 return resp;
747}
748
749static TS_RESP *
750create_response(CONF * conf, const char *section, char *engine,
751 char *queryfile, char *passin, char *inkey,
752 char *signer, char *chain, const char *policy)
753{
754 int ret = 0;
755 TS_RESP *response = NULL;
756 BIO *query_bio = NULL;
757 TS_RESP_CTX *resp_ctx = NULL;
758
759 if (!(query_bio = BIO_new_file(queryfile, "rb")))
760 goto end;
761
762 /* Getting TSA configuration section. */
763 if (!(section = TS_CONF_get_tsa_section(conf, section)))
764 goto end;
765
766 /* Setting up response generation context. */
767 if (!(resp_ctx = TS_RESP_CTX_new()))
768 goto end;
769
770 /* Setting serial number provider callback. */
771 if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
772 goto end;
773#ifndef OPENSSL_NO_ENGINE
774 /* Setting default OpenSSL engine. */
775 if (!TS_CONF_set_crypto_device(conf, section, engine))
776 goto end;
777#endif
778
779 /* Setting TSA signer certificate. */
780 if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
781 goto end;
782
783 /* Setting TSA signer certificate chain. */
784 if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
785 goto end;
786
787 /* Setting TSA signer private key. */
788 if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
789 goto end;
790
791 /* Setting default policy OID. */
792 if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
793 goto end;
794
795 /* Setting acceptable policy OIDs. */
796 if (!TS_CONF_set_policies(conf, section, resp_ctx))
797 goto end;
798
799 /* Setting the acceptable one-way hash algorithms. */
800 if (!TS_CONF_set_digests(conf, section, resp_ctx))
801 goto end;
802
803 /* Setting guaranteed time stamp accuracy. */
804 if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
805 goto end;
806
807 /* Setting the precision of the time. */
808 if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
809 goto end;
810
811 /* Setting the ordering flaf if requested. */
812 if (!TS_CONF_set_ordering(conf, section, resp_ctx))
813 goto end;
814
815 /* Setting the TSA name required flag if requested. */
816 if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
817 goto end;
818
819 /* Setting the ESS cert id chain flag if requested. */
820 if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
821 goto end;
822
823 /* Creating the response. */
824 if (!(response = TS_RESP_create_response(resp_ctx, query_bio)))
825 goto end;
826
827 ret = 1;
828end:
829 if (!ret) {
830 TS_RESP_free(response);
831 response = NULL;
832 }
833 TS_RESP_CTX_free(resp_ctx);
834 BIO_free_all(query_bio);
835
836 return response;
837}
838
839static ASN1_INTEGER *
840serial_cb(TS_RESP_CTX * ctx, void *data)
841{
842 const char *serial_file = (const char *) data;
843 ASN1_INTEGER *serial = next_serial(serial_file);
844
845 if (!serial) {
846 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
847 "Error during serial number "
848 "generation.");
849 TS_RESP_CTX_add_failure_info(ctx,
850 TS_INFO_ADD_INFO_NOT_AVAILABLE);
851 } else
852 save_ts_serial(serial_file, serial);
853
854 return serial;
855}
856
857static ASN1_INTEGER *
858next_serial(const char *serialfile)
859{
860 int ret = 0;
861 BIO *in = NULL;
862 ASN1_INTEGER *serial = NULL;
863 BIGNUM *bn = NULL;
864
865 if (!(serial = ASN1_INTEGER_new()))
866 goto err;
867
868 if (!(in = BIO_new_file(serialfile, "r"))) {
869 ERR_clear_error();
870 BIO_printf(bio_err, "Warning: could not open file %s for "
871 "reading, using serial number: 1\n", serialfile);
872 if (!ASN1_INTEGER_set(serial, 1))
873 goto err;
874 } else {
875 char buf[1024];
876 if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
877 BIO_printf(bio_err, "unable to load number from %s\n",
878 serialfile);
879 goto err;
880 }
881 if (!(bn = ASN1_INTEGER_to_BN(serial, NULL)))
882 goto err;
883 ASN1_INTEGER_free(serial);
884 serial = NULL;
885 if (!BN_add_word(bn, 1))
886 goto err;
887 if (!(serial = BN_to_ASN1_INTEGER(bn, NULL)))
888 goto err;
889 }
890 ret = 1;
891err:
892 if (!ret) {
893 ASN1_INTEGER_free(serial);
894 serial = NULL;
895 }
896 BIO_free_all(in);
897 BN_free(bn);
898 return serial;
899}
900
901static int
902save_ts_serial(const char *serialfile, ASN1_INTEGER * serial)
903{
904 int ret = 0;
905 BIO *out = NULL;
906
907 if (!(out = BIO_new_file(serialfile, "w")))
908 goto err;
909 if (i2a_ASN1_INTEGER(out, serial) <= 0)
910 goto err;
911 if (BIO_puts(out, "\n") <= 0)
912 goto err;
913 ret = 1;
914err:
915 if (!ret)
916 BIO_printf(bio_err, "could not save serial number to %s\n",
917 serialfile);
918 BIO_free_all(out);
919 return ret;
920}
921
922/*
923 * Verify-related method definitions.
924 */
925
926static int
927verify_command(char *data, char *digest, char *queryfile, char *in,
928 int token_in, char *ca_path, char *ca_file, char *untrusted)
929{
930 BIO *in_bio = NULL;
931 PKCS7 *token = NULL;
932 TS_RESP *response = NULL;
933 TS_VERIFY_CTX *verify_ctx = NULL;
934 int ret = 0;
935
936 /* Decode the token (PKCS7) or response (TS_RESP) files. */
937 if (!(in_bio = BIO_new_file(in, "rb")))
938 goto end;
939 if (token_in) {
940 if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
941 goto end;
942 } else {
943 if (!(response = d2i_TS_RESP_bio(in_bio, NULL)))
944 goto end;
945 }
946
947 if (!(verify_ctx = create_verify_ctx(data, digest, queryfile,
948 ca_path, ca_file, untrusted)))
949 goto end;
950
951 /* Checking the token or response against the request. */
952 ret = token_in ?
953 TS_RESP_verify_token(verify_ctx, token) :
954 TS_RESP_verify_response(verify_ctx, response);
955
956end:
957 printf("Verification: ");
958 if (ret)
959 printf("OK\n");
960 else {
961 printf("FAILED\n");
962 /* Print errors, if there are any. */
963 ERR_print_errors(bio_err);
964 }
965
966 /* Clean up. */
967 BIO_free_all(in_bio);
968 PKCS7_free(token);
969 TS_RESP_free(response);
970 TS_VERIFY_CTX_free(verify_ctx);
971 return ret;
972}
973
974static TS_VERIFY_CTX *
975create_verify_ctx(char *data, char *digest, char *queryfile, char *ca_path,
976 char *ca_file, char *untrusted)
977{
978 TS_VERIFY_CTX *ctx = NULL;
979 BIO *input = NULL;
980 TS_REQ *request = NULL;
981 int ret = 0;
982
983 if (data != NULL || digest != NULL) {
984 if (!(ctx = TS_VERIFY_CTX_new()))
985 goto err;
986 ctx->flags = TS_VFY_VERSION | TS_VFY_SIGNER;
987 if (data != NULL) {
988 ctx->flags |= TS_VFY_DATA;
989 if (!(ctx->data = BIO_new_file(data, "rb")))
990 goto err;
991 } else if (digest != NULL) {
992 long imprint_len;
993 ctx->flags |= TS_VFY_IMPRINT;
994 if (!(ctx->imprint = string_to_hex(digest,
995 &imprint_len))) {
996 BIO_printf(bio_err, "invalid digest string\n");
997 goto err;
998 }
999 ctx->imprint_len = imprint_len;
1000 }
1001 } else if (queryfile != NULL) {
1002 /*
1003 * The request has just to be read, decoded and converted to
1004 * a verify context object.
1005 */
1006 if (!(input = BIO_new_file(queryfile, "rb")))
1007 goto err;
1008 if (!(request = d2i_TS_REQ_bio(input, NULL)))
1009 goto err;
1010 if (!(ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)))
1011 goto err;
1012 } else
1013 return NULL;
1014
1015 /* Add the signature verification flag and arguments. */
1016 ctx->flags |= TS_VFY_SIGNATURE;
1017
1018 /* Initialising the X509_STORE object. */
1019 if (!(ctx->store = create_cert_store(ca_path, ca_file)))
1020 goto err;
1021
1022 /* Loading untrusted certificates. */
1023 if (untrusted && !(ctx->certs = TS_CONF_load_certs(untrusted)))
1024 goto err;
1025
1026 ret = 1;
1027err:
1028 if (!ret) {
1029 TS_VERIFY_CTX_free(ctx);
1030 ctx = NULL;
1031 }
1032 BIO_free_all(input);
1033 TS_REQ_free(request);
1034 return ctx;
1035}
1036
1037static X509_STORE *
1038create_cert_store(char *ca_path, char *ca_file)
1039{
1040 X509_STORE *cert_ctx = NULL;
1041 X509_LOOKUP *lookup = NULL;
1042 int i;
1043
1044 /* Creating the X509_STORE object. */
1045 cert_ctx = X509_STORE_new();
1046
1047 /* Setting the callback for certificate chain verification. */
1048 X509_STORE_set_verify_cb(cert_ctx, verify_cb);
1049
1050 /* Adding a trusted certificate directory source. */
1051 if (ca_path) {
1052 lookup = X509_STORE_add_lookup(cert_ctx,
1053 X509_LOOKUP_hash_dir());
1054 if (lookup == NULL) {
1055 BIO_printf(bio_err, "memory allocation failure\n");
1056 goto err;
1057 }
1058 i = X509_LOOKUP_add_dir(lookup, ca_path, X509_FILETYPE_PEM);
1059 if (!i) {
1060 BIO_printf(bio_err, "Error loading directory %s\n",
1061 ca_path);
1062 goto err;
1063 }
1064 }
1065 /* Adding a trusted certificate file source. */
1066 if (ca_file) {
1067 lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
1068 if (lookup == NULL) {
1069 BIO_printf(bio_err, "memory allocation failure\n");
1070 goto err;
1071 }
1072 i = X509_LOOKUP_load_file(lookup, ca_file, X509_FILETYPE_PEM);
1073 if (!i) {
1074 BIO_printf(bio_err, "Error loading file %s\n", ca_file);
1075 goto err;
1076 }
1077 }
1078 return cert_ctx;
1079err:
1080 X509_STORE_free(cert_ctx);
1081 return NULL;
1082}
1083
1084static int
1085verify_cb(int ok, X509_STORE_CTX * ctx)
1086{
1087 /*
1088 char buf[256];
1089
1090 if (!ok)
1091 {
1092 X509_NAME_oneline(X509_get_subject_name(ctx->current_cert),
1093 buf, sizeof(buf));
1094 printf("%s\n", buf);
1095 printf("error %d at %d depth lookup: %s\n",
1096 ctx->error, ctx->error_depth,
1097 X509_verify_cert_error_string(ctx->error));
1098 }
1099 */
1100
1101 return ok;
1102}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-26 06:23:55 +0000