Annotation of src/usr.bin/openssl/ts.c, Revision 1.12
1.12 ! semarie 1: /* $OpenBSD: ts.c,v 1.11 2015/10/10 22:28:51 doug Exp $ */
1.1 jsing 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/ts.h>
70:
71: /* Length of the nonce of the request in bits (must be a multiple of 8). */
72: #define NONCE_LENGTH 64
73:
74: /* Macro definitions for the configuration file. */
75: #define ENV_OID_FILE "oid_file"
76:
77: /* Local function declarations. */
78:
79: static ASN1_OBJECT *txt2obj(const char *oid);
80: static CONF *load_config_file(const char *configfile);
81:
82: /* Query related functions. */
83: static int query_command(const char *data, char *digest,
84: const EVP_MD * md, const char *policy, int no_nonce,
85: int cert, const char *in, const char *out, int text);
86: static BIO *BIO_open_with_default(const char *file, const char *mode,
87: FILE * default_fp);
88: static TS_REQ *create_query(BIO * data_bio, char *digest, const EVP_MD * md,
89: const char *policy, int no_nonce, int cert);
90: static int create_digest(BIO * input, char *digest,
91: const EVP_MD * md, unsigned char **md_value);
92: static ASN1_INTEGER *create_nonce(int bits);
93:
94: /* Reply related functions. */
1.6 bcook 95: static int reply_command(CONF * conf, char *section,
1.1 jsing 96: char *queryfile, char *passin, char *inkey,
97: char *signer, char *chain, const char *policy,
98: char *in, int token_in, char *out, int token_out,
99: int text);
100: static TS_RESP *read_PKCS7(BIO * in_bio);
1.6 bcook 101: static TS_RESP *create_response(CONF * conf, const char *section,
1.1 jsing 102: char *queryfile, char *passin, char *inkey,
103: char *signer, char *chain, const char *policy);
104: static ASN1_INTEGER *serial_cb(TS_RESP_CTX * ctx, void *data);
105: static ASN1_INTEGER *next_serial(const char *serialfile);
106: static int save_ts_serial(const char *serialfile, ASN1_INTEGER * serial);
107:
108: /* Verify related functions. */
109: static int verify_command(char *data, char *digest, char *queryfile,
110: char *in, int token_in,
111: char *ca_path, char *ca_file, char *untrusted);
112: static TS_VERIFY_CTX *create_verify_ctx(char *data, char *digest,
113: char *queryfile,
114: char *ca_path, char *ca_file,
115: char *untrusted);
116: static X509_STORE *create_cert_store(char *ca_path, char *ca_file);
117: static int verify_cb(int ok, X509_STORE_CTX * ctx);
118:
119: int
120: ts_main(int argc, char **argv)
121: {
122: int ret = 1;
123: char *configfile = NULL;
124: char *section = NULL;
125: CONF *conf = NULL;
126: enum mode {
127: CMD_NONE, CMD_QUERY, CMD_REPLY, CMD_VERIFY
128: } mode = CMD_NONE;
129: char *data = NULL;
130: char *digest = NULL;
131: const EVP_MD *md = NULL;
132: char *policy = NULL;
133: int no_nonce = 0;
134: int cert = 0;
135: char *in = NULL;
136: char *out = NULL;
137: int text = 0;
138: char *queryfile = NULL;
139: char *passin = NULL; /* Password source. */
140: char *password = NULL; /* Password itself. */
141: char *inkey = NULL;
142: char *signer = NULL;
143: char *chain = NULL;
144: char *ca_path = NULL;
145: char *ca_file = NULL;
146: char *untrusted = NULL;
147: /* Input is ContentInfo instead of TimeStampResp. */
148: int token_in = 0;
149: /* Output is ContentInfo instead of TimeStampResp. */
150: int token_out = 0;
1.11 doug 151:
152: if (single_execution) {
1.12 ! semarie 153: if (pledge("stdio rpath wpath cpath tty", NULL) == -1)
1.11 doug 154: perror("pledge");
155: }
1.1 jsing 156:
157: for (argc--, argv++; argc > 0; argc--, argv++) {
158: if (strcmp(*argv, "-config") == 0) {
159: if (argc-- < 1)
160: goto usage;
161: configfile = *++argv;
162: } else if (strcmp(*argv, "-section") == 0) {
163: if (argc-- < 1)
164: goto usage;
165: section = *++argv;
166: } else if (strcmp(*argv, "-query") == 0) {
167: if (mode != CMD_NONE)
168: goto usage;
169: mode = CMD_QUERY;
170: } else if (strcmp(*argv, "-data") == 0) {
171: if (argc-- < 1)
172: goto usage;
173: data = *++argv;
174: } else if (strcmp(*argv, "-digest") == 0) {
175: if (argc-- < 1)
176: goto usage;
177: digest = *++argv;
178: } else if (strcmp(*argv, "-policy") == 0) {
179: if (argc-- < 1)
180: goto usage;
181: policy = *++argv;
182: } else if (strcmp(*argv, "-no_nonce") == 0) {
183: no_nonce = 1;
184: } else if (strcmp(*argv, "-cert") == 0) {
185: cert = 1;
186: } else if (strcmp(*argv, "-in") == 0) {
187: if (argc-- < 1)
188: goto usage;
189: in = *++argv;
190: } else if (strcmp(*argv, "-token_in") == 0) {
191: token_in = 1;
192: } else if (strcmp(*argv, "-out") == 0) {
193: if (argc-- < 1)
194: goto usage;
195: out = *++argv;
196: } else if (strcmp(*argv, "-token_out") == 0) {
197: token_out = 1;
198: } else if (strcmp(*argv, "-text") == 0) {
199: text = 1;
200: } else if (strcmp(*argv, "-reply") == 0) {
201: if (mode != CMD_NONE)
202: goto usage;
203: mode = CMD_REPLY;
204: } else if (strcmp(*argv, "-queryfile") == 0) {
205: if (argc-- < 1)
206: goto usage;
207: queryfile = *++argv;
208: } else if (strcmp(*argv, "-passin") == 0) {
209: if (argc-- < 1)
210: goto usage;
211: passin = *++argv;
212: } else if (strcmp(*argv, "-inkey") == 0) {
213: if (argc-- < 1)
214: goto usage;
215: inkey = *++argv;
216: } else if (strcmp(*argv, "-signer") == 0) {
217: if (argc-- < 1)
218: goto usage;
219: signer = *++argv;
220: } else if (strcmp(*argv, "-chain") == 0) {
221: if (argc-- < 1)
222: goto usage;
223: chain = *++argv;
224: } else if (strcmp(*argv, "-verify") == 0) {
225: if (mode != CMD_NONE)
226: goto usage;
227: mode = CMD_VERIFY;
228: } else if (strcmp(*argv, "-CApath") == 0) {
229: if (argc-- < 1)
230: goto usage;
231: ca_path = *++argv;
232: } else if (strcmp(*argv, "-CAfile") == 0) {
233: if (argc-- < 1)
234: goto usage;
235: ca_file = *++argv;
236: } else if (strcmp(*argv, "-untrusted") == 0) {
237: if (argc-- < 1)
238: goto usage;
239: untrusted = *++argv;
240: } else if ((md = EVP_get_digestbyname(*argv + 1)) != NULL) {
241: /* empty. */
242: } else
243: goto usage;
244: }
245:
246: /* Get the password if required. */
247: if (mode == CMD_REPLY && passin &&
248: !app_passwd(bio_err, passin, NULL, &password, NULL)) {
249: BIO_printf(bio_err, "Error getting password.\n");
250: goto cleanup;
251: }
252: /*
253: * Check consistency of parameters and execute the appropriate
254: * function.
255: */
256: switch (mode) {
257: case CMD_NONE:
258: goto usage;
259: case CMD_QUERY:
260: /*
261: * Data file and message imprint cannot be specified at the
262: * same time.
263: */
264: ret = data != NULL && digest != NULL;
265: if (ret)
266: goto usage;
267: /* Load the config file for possible policy OIDs. */
268: conf = load_config_file(configfile);
269: ret = !query_command(data, digest, md, policy, no_nonce, cert,
270: in, out, text);
271: break;
272: case CMD_REPLY:
273: conf = load_config_file(configfile);
274: if (in == NULL) {
275: ret = !(queryfile != NULL && conf != NULL && !token_in);
276: if (ret)
277: goto usage;
278: } else {
279: /* 'in' and 'queryfile' are exclusive. */
280: ret = !(queryfile == NULL);
281: if (ret)
282: goto usage;
283: }
284:
1.6 bcook 285: ret = !reply_command(conf, section, queryfile,
1.1 jsing 286: password, inkey, signer, chain, policy,
287: in, token_in, out, token_out, text);
288: break;
289: case CMD_VERIFY:
290: ret = !(((queryfile && !data && !digest) ||
291: (!queryfile && data && !digest) ||
292: (!queryfile && !data && digest)) && in != NULL);
293: if (ret)
294: goto usage;
295:
296: ret = !verify_command(data, digest, queryfile, in, token_in,
297: ca_path, ca_file, untrusted);
298: }
299:
300: goto cleanup;
301:
302: usage:
303: BIO_printf(bio_err, "usage:\n"
304: "ts -query [-config configfile] "
305: "[-data file_to_hash] [-digest digest_bytes]"
1.10 bcook 306: "[-md4|-md5|-sha1|-ripemd160] "
1.1 jsing 307: "[-policy object_id] [-no_nonce] [-cert] "
308: "[-in request.tsq] [-out request.tsq] [-text]\n");
309: BIO_printf(bio_err, "or\n"
310: "ts -reply [-config configfile] [-section tsa_section] "
311: "[-queryfile request.tsq] [-passin password] "
312: "[-signer tsa_cert.pem] [-inkey private_key.pem] "
313: "[-chain certs_file.pem] [-policy object_id] "
314: "[-in response.tsr] [-token_in] "
1.6 bcook 315: "[-out response.tsr] [-token_out] [-text]\n");
1.1 jsing 316: BIO_printf(bio_err, "or\n"
317: "ts -verify [-data file_to_hash] [-digest digest_bytes] "
318: "[-queryfile request.tsq] "
319: "-in response.tsr [-token_in] "
320: "-CApath ca_path -CAfile ca_file.pem "
321: "-untrusted cert_file.pem\n");
322:
323: cleanup:
324: /* Clean up. */
325: NCONF_free(conf);
326: free(password);
327: OBJ_cleanup();
328:
329: return (ret);
330: }
331:
332: /*
333: * Configuration file-related function definitions.
334: */
335:
336: static ASN1_OBJECT *
337: txt2obj(const char *oid)
338: {
339: ASN1_OBJECT *oid_obj = NULL;
340:
341: if (!(oid_obj = OBJ_txt2obj(oid, 0)))
342: BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
343:
344: return oid_obj;
345: }
346:
347: static CONF *
348: load_config_file(const char *configfile)
349: {
350: CONF *conf = NULL;
351: long errorline = -1;
352:
353: if (!configfile)
354: configfile = getenv("OPENSSL_CONF");
355:
356: if (configfile &&
357: (!(conf = NCONF_new(NULL)) ||
358: NCONF_load(conf, configfile, &errorline) <= 0)) {
359: if (errorline <= 0)
360: BIO_printf(bio_err, "error loading the config file "
361: "'%s'\n", configfile);
362: else
363: BIO_printf(bio_err, "error on line %ld of config file "
364: "'%s'\n", errorline, configfile);
365: }
366: if (conf != NULL) {
367: const char *p;
368:
369: BIO_printf(bio_err, "Using configuration from %s\n",
370: configfile);
371: p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
372: if (p != NULL) {
373: BIO *oid_bio = BIO_new_file(p, "r");
374: if (!oid_bio)
375: ERR_print_errors(bio_err);
376: else {
377: OBJ_create_objects(oid_bio);
378: BIO_free_all(oid_bio);
379: }
380: } else
381: ERR_clear_error();
382: if (!add_oid_section(bio_err, conf))
383: ERR_print_errors(bio_err);
384: }
385: return conf;
386: }
387:
388: /*
389: * Query-related method definitions.
390: */
391:
392: static int
393: query_command(const char *data, char *digest, const EVP_MD * md,
394: const char *policy, int no_nonce, int cert, const char *in,
395: const char *out, int text)
396: {
397: int ret = 0;
398: TS_REQ *query = NULL;
399: BIO *in_bio = NULL;
400: BIO *data_bio = NULL;
401: BIO *out_bio = NULL;
402:
403: /* Build query object either from file or from scratch. */
404: if (in != NULL) {
405: if ((in_bio = BIO_new_file(in, "rb")) == NULL)
406: goto end;
407: query = d2i_TS_REQ_bio(in_bio, NULL);
408: } else {
409: /* Open the file if no explicit digest bytes were specified. */
410: if (!digest &&
411: !(data_bio = BIO_open_with_default(data, "rb", stdin)))
412: goto end;
413: /* Creating the query object. */
414: query = create_query(data_bio, digest, md,
415: policy, no_nonce, cert);
416: /* Saving the random number generator state. */
417: }
418: if (query == NULL)
419: goto end;
420:
421: /* Write query either in ASN.1 or in text format. */
422: if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
423: goto end;
424: if (text) {
425: /* Text output. */
426: if (!TS_REQ_print_bio(out_bio, query))
427: goto end;
428: } else {
429: /* ASN.1 output. */
430: if (!i2d_TS_REQ_bio(out_bio, query))
431: goto end;
432: }
433:
434: ret = 1;
435:
436: end:
437: ERR_print_errors(bio_err);
438:
439: /* Clean up. */
440: BIO_free_all(in_bio);
441: BIO_free_all(data_bio);
442: BIO_free_all(out_bio);
443: TS_REQ_free(query);
444:
445: return ret;
446: }
447:
448: static BIO *
449: BIO_open_with_default(const char *file, const char *mode, FILE * default_fp)
450: {
451: return file == NULL ? BIO_new_fp(default_fp, BIO_NOCLOSE) :
452: BIO_new_file(file, mode);
453: }
454:
455: static TS_REQ *
456: create_query(BIO * data_bio, char *digest, const EVP_MD * md,
457: const char *policy, int no_nonce, int cert)
458: {
459: int ret = 0;
460: TS_REQ *ts_req = NULL;
461: int len;
462: TS_MSG_IMPRINT *msg_imprint = NULL;
463: X509_ALGOR *algo = NULL;
464: unsigned char *data = NULL;
465: ASN1_OBJECT *policy_obj = NULL;
466: ASN1_INTEGER *nonce_asn1 = NULL;
467:
468: /* Setting default message digest. */
469: if (!md && !(md = EVP_get_digestbyname("sha1")))
470: goto err;
471:
472: /* Creating request object. */
473: if (!(ts_req = TS_REQ_new()))
474: goto err;
475:
476: /* Setting version. */
477: if (!TS_REQ_set_version(ts_req, 1))
478: goto err;
479:
480: /* Creating and adding MSG_IMPRINT object. */
481: if (!(msg_imprint = TS_MSG_IMPRINT_new()))
482: goto err;
483:
484: /* Adding algorithm. */
485: if (!(algo = X509_ALGOR_new()))
486: goto err;
487: if (!(algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))))
488: goto err;
489: if (!(algo->parameter = ASN1_TYPE_new()))
490: goto err;
491: algo->parameter->type = V_ASN1_NULL;
492: if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
493: goto err;
494:
495: /* Adding message digest. */
496: if ((len = create_digest(data_bio, digest, md, &data)) == 0)
497: goto err;
498: if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
499: goto err;
500:
501: if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
502: goto err;
503:
504: /* Setting policy if requested. */
505: if (policy && !(policy_obj = txt2obj(policy)))
506: goto err;
507: if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
508: goto err;
509:
510: /* Setting nonce if requested. */
511: if (!no_nonce && !(nonce_asn1 = create_nonce(NONCE_LENGTH)))
512: goto err;
513: if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
514: goto err;
515:
516: /* Setting certificate request flag if requested. */
517: if (!TS_REQ_set_cert_req(ts_req, cert))
518: goto err;
519:
520: ret = 1;
521:
522: err:
523: if (!ret) {
524: TS_REQ_free(ts_req);
525: ts_req = NULL;
526: BIO_printf(bio_err, "could not create query\n");
527: }
528: TS_MSG_IMPRINT_free(msg_imprint);
529: X509_ALGOR_free(algo);
530: free(data);
531: ASN1_OBJECT_free(policy_obj);
532: ASN1_INTEGER_free(nonce_asn1);
533:
534: return ts_req;
535: }
536:
537: static int
538: create_digest(BIO * input, char *digest, const EVP_MD * md,
539: unsigned char **md_value)
540: {
541: int md_value_len;
542:
543: md_value_len = EVP_MD_size(md);
544: if (md_value_len < 0)
545: goto err;
546: if (input) {
547: /* Digest must be computed from an input file. */
548: EVP_MD_CTX md_ctx;
549: unsigned char buffer[4096];
550: int length;
551:
552: *md_value = malloc(md_value_len);
553: if (*md_value == 0)
554: goto err;
555:
556: EVP_DigestInit(&md_ctx, md);
557: while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
558: EVP_DigestUpdate(&md_ctx, buffer, length);
559: }
560: EVP_DigestFinal(&md_ctx, *md_value, NULL);
561: } else {
562: /* Digest bytes are specified with digest. */
563: long digest_len;
564: *md_value = string_to_hex(digest, &digest_len);
565: if (!*md_value || md_value_len != digest_len) {
566: free(*md_value);
567: *md_value = NULL;
568: BIO_printf(bio_err, "bad digest, %d bytes "
569: "must be specified\n", md_value_len);
570: goto err;
571: }
572: }
573:
574: return md_value_len;
575: err:
576: return 0;
577: }
578:
579: static ASN1_INTEGER *
580: create_nonce(int bits)
581: {
582: unsigned char buf[20];
583: ASN1_INTEGER *nonce = NULL;
584: int len = (bits - 1) / 8 + 1;
585: int i;
586:
587: /* Generating random byte sequence. */
588: if (len > (int) sizeof(buf))
589: goto err;
1.3 jsing 590: arc4random_buf(buf, len);
1.1 jsing 591:
592: /* Find the first non-zero byte and creating ASN1_INTEGER object. */
593: for (i = 0; i < len && !buf[i]; ++i)
594: ;
595: if (!(nonce = ASN1_INTEGER_new()))
596: goto err;
597: free(nonce->data);
598: /* Allocate at least one byte. */
599: nonce->length = len - i;
600: if (!(nonce->data = malloc(nonce->length + 1)))
601: goto err;
602: memcpy(nonce->data, buf + i, nonce->length);
603:
604: return nonce;
605:
606: err:
607: BIO_printf(bio_err, "could not create nonce\n");
608: ASN1_INTEGER_free(nonce);
609: return NULL;
610: }
611: /*
612: * Reply-related method definitions.
613: */
614:
615: static int
1.6 bcook 616: reply_command(CONF * conf, char *section, char *queryfile,
1.1 jsing 617: char *passin, char *inkey, char *signer, char *chain, const char *policy,
618: char *in, int token_in, char *out, int token_out, int text)
619: {
620: int ret = 0;
621: TS_RESP *response = NULL;
622: BIO *in_bio = NULL;
623: BIO *query_bio = NULL;
624: BIO *inkey_bio = NULL;
625: BIO *signer_bio = NULL;
626: BIO *out_bio = NULL;
627:
628: /* Build response object either from response or query. */
629: if (in != NULL) {
630: if ((in_bio = BIO_new_file(in, "rb")) == NULL)
631: goto end;
632: if (token_in) {
633: /*
634: * We have a ContentInfo (PKCS7) object, add
635: * 'granted' status info around it.
636: */
637: response = read_PKCS7(in_bio);
638: } else {
639: /* We have a ready-made TS_RESP object. */
640: response = d2i_TS_RESP_bio(in_bio, NULL);
641: }
642: } else {
1.6 bcook 643: response = create_response(conf, section, queryfile,
1.1 jsing 644: passin, inkey, signer, chain,
645: policy);
646: if (response)
647: BIO_printf(bio_err, "Response has been generated.\n");
648: else
649: BIO_printf(bio_err, "Response is not generated.\n");
650: }
651: if (response == NULL)
652: goto end;
653:
654: /* Write response either in ASN.1 or text format. */
655: if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
656: goto end;
657: if (text) {
658: /* Text output. */
659: if (token_out) {
660: TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
661: if (!TS_TST_INFO_print_bio(out_bio, tst_info))
662: goto end;
663: } else {
664: if (!TS_RESP_print_bio(out_bio, response))
665: goto end;
666: }
667: } else {
668: /* ASN.1 DER output. */
669: if (token_out) {
670: PKCS7 *token = TS_RESP_get_token(response);
671: if (!i2d_PKCS7_bio(out_bio, token))
672: goto end;
673: } else {
674: if (!i2d_TS_RESP_bio(out_bio, response))
675: goto end;
676: }
677: }
678:
679: ret = 1;
680:
681: end:
682: ERR_print_errors(bio_err);
683:
684: /* Clean up. */
685: BIO_free_all(in_bio);
686: BIO_free_all(query_bio);
687: BIO_free_all(inkey_bio);
688: BIO_free_all(signer_bio);
689: BIO_free_all(out_bio);
690: TS_RESP_free(response);
691:
692: return ret;
693: }
694:
695: /* Reads a PKCS7 token and adds default 'granted' status info to it. */
696: static TS_RESP *
697: read_PKCS7(BIO * in_bio)
698: {
699: int ret = 0;
700: PKCS7 *token = NULL;
701: TS_TST_INFO *tst_info = NULL;
702: TS_RESP *resp = NULL;
703: TS_STATUS_INFO *si = NULL;
704:
705: /* Read PKCS7 object and extract the signed time stamp info. */
706: if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
707: goto end;
708: if (!(tst_info = PKCS7_to_TS_TST_INFO(token)))
709: goto end;
710:
711: /* Creating response object. */
712: if (!(resp = TS_RESP_new()))
713: goto end;
714:
715: /* Create granted status info. */
716: if (!(si = TS_STATUS_INFO_new()))
717: goto end;
718: if (!(ASN1_INTEGER_set(si->status, TS_STATUS_GRANTED)))
719: goto end;
720: if (!TS_RESP_set_status_info(resp, si))
721: goto end;
722:
723: /* Setting encapsulated token. */
724: TS_RESP_set_tst_info(resp, token, tst_info);
725: token = NULL; /* Ownership is lost. */
726: tst_info = NULL; /* Ownership is lost. */
727:
728: ret = 1;
729: end:
730: PKCS7_free(token);
731: TS_TST_INFO_free(tst_info);
732: if (!ret) {
733: TS_RESP_free(resp);
734: resp = NULL;
735: }
736: TS_STATUS_INFO_free(si);
737: return resp;
738: }
739:
740: static TS_RESP *
1.6 bcook 741: create_response(CONF * conf, const char *section,
1.1 jsing 742: char *queryfile, char *passin, char *inkey,
743: char *signer, char *chain, const char *policy)
744: {
745: int ret = 0;
746: TS_RESP *response = NULL;
747: BIO *query_bio = NULL;
748: TS_RESP_CTX *resp_ctx = NULL;
749:
750: if (!(query_bio = BIO_new_file(queryfile, "rb")))
751: goto end;
752:
753: /* Getting TSA configuration section. */
754: if (!(section = TS_CONF_get_tsa_section(conf, section)))
755: goto end;
756:
757: /* Setting up response generation context. */
758: if (!(resp_ctx = TS_RESP_CTX_new()))
759: goto end;
760:
761: /* Setting serial number provider callback. */
762: if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
763: goto end;
764:
765: /* Setting TSA signer certificate. */
766: if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
767: goto end;
768:
769: /* Setting TSA signer certificate chain. */
770: if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
771: goto end;
772:
773: /* Setting TSA signer private key. */
774: if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
775: goto end;
776:
777: /* Setting default policy OID. */
778: if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
779: goto end;
780:
781: /* Setting acceptable policy OIDs. */
782: if (!TS_CONF_set_policies(conf, section, resp_ctx))
783: goto end;
784:
785: /* Setting the acceptable one-way hash algorithms. */
786: if (!TS_CONF_set_digests(conf, section, resp_ctx))
787: goto end;
788:
789: /* Setting guaranteed time stamp accuracy. */
790: if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
791: goto end;
792:
793: /* Setting the precision of the time. */
794: if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
795: goto end;
796:
797: /* Setting the ordering flaf if requested. */
798: if (!TS_CONF_set_ordering(conf, section, resp_ctx))
799: goto end;
800:
801: /* Setting the TSA name required flag if requested. */
802: if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
803: goto end;
804:
805: /* Setting the ESS cert id chain flag if requested. */
806: if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
807: goto end;
808:
809: /* Creating the response. */
810: if (!(response = TS_RESP_create_response(resp_ctx, query_bio)))
811: goto end;
812:
813: ret = 1;
814: end:
815: if (!ret) {
816: TS_RESP_free(response);
817: response = NULL;
818: }
819: TS_RESP_CTX_free(resp_ctx);
820: BIO_free_all(query_bio);
821:
822: return response;
823: }
824:
825: static ASN1_INTEGER *
826: serial_cb(TS_RESP_CTX * ctx, void *data)
827: {
828: const char *serial_file = (const char *) data;
829: ASN1_INTEGER *serial = next_serial(serial_file);
830:
831: if (!serial) {
832: TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
833: "Error during serial number "
834: "generation.");
835: TS_RESP_CTX_add_failure_info(ctx,
836: TS_INFO_ADD_INFO_NOT_AVAILABLE);
837: } else
838: save_ts_serial(serial_file, serial);
839:
840: return serial;
841: }
842:
843: static ASN1_INTEGER *
844: next_serial(const char *serialfile)
845: {
846: int ret = 0;
847: BIO *in = NULL;
848: ASN1_INTEGER *serial = NULL;
849: BIGNUM *bn = NULL;
850:
851: if (!(serial = ASN1_INTEGER_new()))
852: goto err;
853:
854: if (!(in = BIO_new_file(serialfile, "r"))) {
855: ERR_clear_error();
856: BIO_printf(bio_err, "Warning: could not open file %s for "
857: "reading, using serial number: 1\n", serialfile);
858: if (!ASN1_INTEGER_set(serial, 1))
859: goto err;
860: } else {
861: char buf[1024];
862: if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
863: BIO_printf(bio_err, "unable to load number from %s\n",
864: serialfile);
865: goto err;
866: }
867: if (!(bn = ASN1_INTEGER_to_BN(serial, NULL)))
868: goto err;
869: ASN1_INTEGER_free(serial);
870: serial = NULL;
871: if (!BN_add_word(bn, 1))
872: goto err;
873: if (!(serial = BN_to_ASN1_INTEGER(bn, NULL)))
874: goto err;
875: }
876: ret = 1;
877: err:
878: if (!ret) {
879: ASN1_INTEGER_free(serial);
880: serial = NULL;
881: }
882: BIO_free_all(in);
883: BN_free(bn);
884: return serial;
885: }
886:
887: static int
888: save_ts_serial(const char *serialfile, ASN1_INTEGER * serial)
889: {
890: int ret = 0;
891: BIO *out = NULL;
892:
893: if (!(out = BIO_new_file(serialfile, "w")))
894: goto err;
895: if (i2a_ASN1_INTEGER(out, serial) <= 0)
896: goto err;
897: if (BIO_puts(out, "\n") <= 0)
898: goto err;
899: ret = 1;
900: err:
901: if (!ret)
902: BIO_printf(bio_err, "could not save serial number to %s\n",
903: serialfile);
904: BIO_free_all(out);
905: return ret;
906: }
907:
908: /*
909: * Verify-related method definitions.
910: */
911:
912: static int
913: verify_command(char *data, char *digest, char *queryfile, char *in,
914: int token_in, char *ca_path, char *ca_file, char *untrusted)
915: {
916: BIO *in_bio = NULL;
917: PKCS7 *token = NULL;
918: TS_RESP *response = NULL;
919: TS_VERIFY_CTX *verify_ctx = NULL;
920: int ret = 0;
921:
922: /* Decode the token (PKCS7) or response (TS_RESP) files. */
923: if (!(in_bio = BIO_new_file(in, "rb")))
924: goto end;
925: if (token_in) {
926: if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
927: goto end;
928: } else {
929: if (!(response = d2i_TS_RESP_bio(in_bio, NULL)))
930: goto end;
931: }
932:
933: if (!(verify_ctx = create_verify_ctx(data, digest, queryfile,
934: ca_path, ca_file, untrusted)))
935: goto end;
936:
937: /* Checking the token or response against the request. */
938: ret = token_in ?
939: TS_RESP_verify_token(verify_ctx, token) :
940: TS_RESP_verify_response(verify_ctx, response);
941:
942: end:
943: printf("Verification: ");
944: if (ret)
945: printf("OK\n");
946: else {
947: printf("FAILED\n");
948: /* Print errors, if there are any. */
949: ERR_print_errors(bio_err);
950: }
951:
952: /* Clean up. */
953: BIO_free_all(in_bio);
954: PKCS7_free(token);
955: TS_RESP_free(response);
956: TS_VERIFY_CTX_free(verify_ctx);
957: return ret;
958: }
959:
960: static TS_VERIFY_CTX *
961: create_verify_ctx(char *data, char *digest, char *queryfile, char *ca_path,
962: char *ca_file, char *untrusted)
963: {
964: TS_VERIFY_CTX *ctx = NULL;
965: BIO *input = NULL;
966: TS_REQ *request = NULL;
967: int ret = 0;
968:
969: if (data != NULL || digest != NULL) {
970: if (!(ctx = TS_VERIFY_CTX_new()))
971: goto err;
972: ctx->flags = TS_VFY_VERSION | TS_VFY_SIGNER;
973: if (data != NULL) {
974: ctx->flags |= TS_VFY_DATA;
975: if (!(ctx->data = BIO_new_file(data, "rb")))
976: goto err;
977: } else if (digest != NULL) {
978: long imprint_len;
979: ctx->flags |= TS_VFY_IMPRINT;
980: if (!(ctx->imprint = string_to_hex(digest,
981: &imprint_len))) {
982: BIO_printf(bio_err, "invalid digest string\n");
983: goto err;
984: }
985: ctx->imprint_len = imprint_len;
986: }
987: } else if (queryfile != NULL) {
988: /*
989: * The request has just to be read, decoded and converted to
990: * a verify context object.
991: */
992: if (!(input = BIO_new_file(queryfile, "rb")))
993: goto err;
994: if (!(request = d2i_TS_REQ_bio(input, NULL)))
995: goto err;
996: if (!(ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)))
997: goto err;
998: } else
999: return NULL;
1000:
1001: /* Add the signature verification flag and arguments. */
1002: ctx->flags |= TS_VFY_SIGNATURE;
1003:
1004: /* Initialising the X509_STORE object. */
1005: if (!(ctx->store = create_cert_store(ca_path, ca_file)))
1006: goto err;
1007:
1008: /* Loading untrusted certificates. */
1009: if (untrusted && !(ctx->certs = TS_CONF_load_certs(untrusted)))
1010: goto err;
1011:
1012: ret = 1;
1013: err:
1014: if (!ret) {
1015: TS_VERIFY_CTX_free(ctx);
1016: ctx = NULL;
1017: }
1018: BIO_free_all(input);
1019: TS_REQ_free(request);
1020: return ctx;
1021: }
1022:
1023: static X509_STORE *
1024: create_cert_store(char *ca_path, char *ca_file)
1025: {
1026: X509_STORE *cert_ctx = NULL;
1027: X509_LOOKUP *lookup = NULL;
1028: int i;
1029:
1030: /* Creating the X509_STORE object. */
1031: cert_ctx = X509_STORE_new();
1032:
1033: /* Setting the callback for certificate chain verification. */
1034: X509_STORE_set_verify_cb(cert_ctx, verify_cb);
1035:
1036: /* Adding a trusted certificate directory source. */
1037: if (ca_path) {
1038: lookup = X509_STORE_add_lookup(cert_ctx,
1039: X509_LOOKUP_hash_dir());
1040: if (lookup == NULL) {
1041: BIO_printf(bio_err, "memory allocation failure\n");
1042: goto err;
1043: }
1044: i = X509_LOOKUP_add_dir(lookup, ca_path, X509_FILETYPE_PEM);
1045: if (!i) {
1046: BIO_printf(bio_err, "Error loading directory %s\n",
1047: ca_path);
1048: goto err;
1049: }
1050: }
1051: /* Adding a trusted certificate file source. */
1052: if (ca_file) {
1053: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
1054: if (lookup == NULL) {
1055: BIO_printf(bio_err, "memory allocation failure\n");
1056: goto err;
1057: }
1058: i = X509_LOOKUP_load_file(lookup, ca_file, X509_FILETYPE_PEM);
1059: if (!i) {
1060: BIO_printf(bio_err, "Error loading file %s\n", ca_file);
1061: goto err;
1062: }
1063: }
1064: return cert_ctx;
1065: err:
1066: X509_STORE_free(cert_ctx);
1067: return NULL;
1068: }
1069:
1070: static int
1071: verify_cb(int ok, X509_STORE_CTX * ctx)
1072: {
1073: /*
1074: char buf[256];
1075:
1076: if (!ok)
1077: {
1078: X509_NAME_oneline(X509_get_subject_name(ctx->current_cert),
1079: buf, sizeof(buf));
1080: printf("%s\n", buf);
1081: printf("error %d at %d depth lookup: %s\n",
1082: ctx->error, ctx->error_depth,
1083: X509_verify_cert_error_string(ctx->error));
1084: }
1085: */
1086:
1087: return ok;
1088: }
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