Annotation of src/usr.bin/openssl/ts.c, Revision 1.6
1.6 ! bcook 1: /* $OpenBSD: ts.c,v 1.5 2015/08/22 16:36:05 jsing 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;
151:
152: for (argc--, argv++; argc > 0; argc--, argv++) {
153: if (strcmp(*argv, "-config") == 0) {
154: if (argc-- < 1)
155: goto usage;
156: configfile = *++argv;
157: } else if (strcmp(*argv, "-section") == 0) {
158: if (argc-- < 1)
159: goto usage;
160: section = *++argv;
161: } else if (strcmp(*argv, "-query") == 0) {
162: if (mode != CMD_NONE)
163: goto usage;
164: mode = CMD_QUERY;
165: } else if (strcmp(*argv, "-data") == 0) {
166: if (argc-- < 1)
167: goto usage;
168: data = *++argv;
169: } else if (strcmp(*argv, "-digest") == 0) {
170: if (argc-- < 1)
171: goto usage;
172: digest = *++argv;
173: } else if (strcmp(*argv, "-policy") == 0) {
174: if (argc-- < 1)
175: goto usage;
176: policy = *++argv;
177: } else if (strcmp(*argv, "-no_nonce") == 0) {
178: no_nonce = 1;
179: } else if (strcmp(*argv, "-cert") == 0) {
180: cert = 1;
181: } else if (strcmp(*argv, "-in") == 0) {
182: if (argc-- < 1)
183: goto usage;
184: in = *++argv;
185: } else if (strcmp(*argv, "-token_in") == 0) {
186: token_in = 1;
187: } else if (strcmp(*argv, "-out") == 0) {
188: if (argc-- < 1)
189: goto usage;
190: out = *++argv;
191: } else if (strcmp(*argv, "-token_out") == 0) {
192: token_out = 1;
193: } else if (strcmp(*argv, "-text") == 0) {
194: text = 1;
195: } else if (strcmp(*argv, "-reply") == 0) {
196: if (mode != CMD_NONE)
197: goto usage;
198: mode = CMD_REPLY;
199: } else if (strcmp(*argv, "-queryfile") == 0) {
200: if (argc-- < 1)
201: goto usage;
202: queryfile = *++argv;
203: } else if (strcmp(*argv, "-passin") == 0) {
204: if (argc-- < 1)
205: goto usage;
206: passin = *++argv;
207: } else if (strcmp(*argv, "-inkey") == 0) {
208: if (argc-- < 1)
209: goto usage;
210: inkey = *++argv;
211: } else if (strcmp(*argv, "-signer") == 0) {
212: if (argc-- < 1)
213: goto usage;
214: signer = *++argv;
215: } else if (strcmp(*argv, "-chain") == 0) {
216: if (argc-- < 1)
217: goto usage;
218: chain = *++argv;
219: } else if (strcmp(*argv, "-verify") == 0) {
220: if (mode != CMD_NONE)
221: goto usage;
222: mode = CMD_VERIFY;
223: } else if (strcmp(*argv, "-CApath") == 0) {
224: if (argc-- < 1)
225: goto usage;
226: ca_path = *++argv;
227: } else if (strcmp(*argv, "-CAfile") == 0) {
228: if (argc-- < 1)
229: goto usage;
230: ca_file = *++argv;
231: } else if (strcmp(*argv, "-untrusted") == 0) {
232: if (argc-- < 1)
233: goto usage;
234: untrusted = *++argv;
235: } else if ((md = EVP_get_digestbyname(*argv + 1)) != NULL) {
236: /* empty. */
237: } else
238: goto usage;
239: }
240:
241: /* Get the password if required. */
242: if (mode == CMD_REPLY && passin &&
243: !app_passwd(bio_err, passin, NULL, &password, NULL)) {
244: BIO_printf(bio_err, "Error getting password.\n");
245: goto cleanup;
246: }
247: /*
248: * Check consistency of parameters and execute the appropriate
249: * function.
250: */
251: switch (mode) {
252: case CMD_NONE:
253: goto usage;
254: case CMD_QUERY:
255: /*
256: * Data file and message imprint cannot be specified at the
257: * same time.
258: */
259: ret = data != NULL && digest != NULL;
260: if (ret)
261: goto usage;
262: /* Load the config file for possible policy OIDs. */
263: conf = load_config_file(configfile);
264: ret = !query_command(data, digest, md, policy, no_nonce, cert,
265: in, out, text);
266: break;
267: case CMD_REPLY:
268: conf = load_config_file(configfile);
269: if (in == NULL) {
270: ret = !(queryfile != NULL && conf != NULL && !token_in);
271: if (ret)
272: goto usage;
273: } else {
274: /* 'in' and 'queryfile' are exclusive. */
275: ret = !(queryfile == NULL);
276: if (ret)
277: goto usage;
278: }
279:
1.6 ! bcook 280: ret = !reply_command(conf, section, queryfile,
1.1 jsing 281: password, inkey, signer, chain, policy,
282: in, token_in, out, token_out, text);
283: break;
284: case CMD_VERIFY:
285: ret = !(((queryfile && !data && !digest) ||
286: (!queryfile && data && !digest) ||
287: (!queryfile && !data && digest)) && in != NULL);
288: if (ret)
289: goto usage;
290:
291: ret = !verify_command(data, digest, queryfile, in, token_in,
292: ca_path, ca_file, untrusted);
293: }
294:
295: goto cleanup;
296:
297: usage:
298: BIO_printf(bio_err, "usage:\n"
299: "ts -query [-config configfile] "
300: "[-data file_to_hash] [-digest digest_bytes]"
1.4 doug 301: "[-md2|-md4|-md5|-sha|-sha1|-ripemd160] "
1.1 jsing 302: "[-policy object_id] [-no_nonce] [-cert] "
303: "[-in request.tsq] [-out request.tsq] [-text]\n");
304: BIO_printf(bio_err, "or\n"
305: "ts -reply [-config configfile] [-section tsa_section] "
306: "[-queryfile request.tsq] [-passin password] "
307: "[-signer tsa_cert.pem] [-inkey private_key.pem] "
308: "[-chain certs_file.pem] [-policy object_id] "
309: "[-in response.tsr] [-token_in] "
1.6 ! bcook 310: "[-out response.tsr] [-token_out] [-text]\n");
1.1 jsing 311: BIO_printf(bio_err, "or\n"
312: "ts -verify [-data file_to_hash] [-digest digest_bytes] "
313: "[-queryfile request.tsq] "
314: "-in response.tsr [-token_in] "
315: "-CApath ca_path -CAfile ca_file.pem "
316: "-untrusted cert_file.pem\n");
317:
318: cleanup:
319: /* Clean up. */
320: NCONF_free(conf);
321: free(password);
322: OBJ_cleanup();
323:
324: return (ret);
325: }
326:
327: /*
328: * Configuration file-related function definitions.
329: */
330:
331: static ASN1_OBJECT *
332: txt2obj(const char *oid)
333: {
334: ASN1_OBJECT *oid_obj = NULL;
335:
336: if (!(oid_obj = OBJ_txt2obj(oid, 0)))
337: BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
338:
339: return oid_obj;
340: }
341:
342: static CONF *
343: load_config_file(const char *configfile)
344: {
345: CONF *conf = NULL;
346: long errorline = -1;
347:
348: if (!configfile)
349: configfile = getenv("OPENSSL_CONF");
350: if (!configfile)
351: configfile = getenv("SSLEAY_CONF");
352:
353: if (configfile &&
354: (!(conf = NCONF_new(NULL)) ||
355: NCONF_load(conf, configfile, &errorline) <= 0)) {
356: if (errorline <= 0)
357: BIO_printf(bio_err, "error loading the config file "
358: "'%s'\n", configfile);
359: else
360: BIO_printf(bio_err, "error on line %ld of config file "
361: "'%s'\n", errorline, configfile);
362: }
363: if (conf != NULL) {
364: const char *p;
365:
366: BIO_printf(bio_err, "Using configuration from %s\n",
367: configfile);
368: p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
369: if (p != NULL) {
370: BIO *oid_bio = BIO_new_file(p, "r");
371: if (!oid_bio)
372: ERR_print_errors(bio_err);
373: else {
374: OBJ_create_objects(oid_bio);
375: BIO_free_all(oid_bio);
376: }
377: } else
378: ERR_clear_error();
379: if (!add_oid_section(bio_err, conf))
380: ERR_print_errors(bio_err);
381: }
382: return conf;
383: }
384:
385: /*
386: * Query-related method definitions.
387: */
388:
389: static int
390: query_command(const char *data, char *digest, const EVP_MD * md,
391: const char *policy, int no_nonce, int cert, const char *in,
392: const char *out, int text)
393: {
394: int ret = 0;
395: TS_REQ *query = NULL;
396: BIO *in_bio = NULL;
397: BIO *data_bio = NULL;
398: BIO *out_bio = NULL;
399:
400: /* Build query object either from file or from scratch. */
401: if (in != NULL) {
402: if ((in_bio = BIO_new_file(in, "rb")) == NULL)
403: goto end;
404: query = d2i_TS_REQ_bio(in_bio, NULL);
405: } else {
406: /* Open the file if no explicit digest bytes were specified. */
407: if (!digest &&
408: !(data_bio = BIO_open_with_default(data, "rb", stdin)))
409: goto end;
410: /* Creating the query object. */
411: query = create_query(data_bio, digest, md,
412: policy, no_nonce, cert);
413: /* Saving the random number generator state. */
414: }
415: if (query == NULL)
416: goto end;
417:
418: /* Write query either in ASN.1 or in text format. */
419: if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
420: goto end;
421: if (text) {
422: /* Text output. */
423: if (!TS_REQ_print_bio(out_bio, query))
424: goto end;
425: } else {
426: /* ASN.1 output. */
427: if (!i2d_TS_REQ_bio(out_bio, query))
428: goto end;
429: }
430:
431: ret = 1;
432:
433: end:
434: ERR_print_errors(bio_err);
435:
436: /* Clean up. */
437: BIO_free_all(in_bio);
438: BIO_free_all(data_bio);
439: BIO_free_all(out_bio);
440: TS_REQ_free(query);
441:
442: return ret;
443: }
444:
445: static BIO *
446: BIO_open_with_default(const char *file, const char *mode, FILE * default_fp)
447: {
448: return file == NULL ? BIO_new_fp(default_fp, BIO_NOCLOSE) :
449: BIO_new_file(file, mode);
450: }
451:
452: static TS_REQ *
453: create_query(BIO * data_bio, char *digest, const EVP_MD * md,
454: const char *policy, int no_nonce, int cert)
455: {
456: int ret = 0;
457: TS_REQ *ts_req = NULL;
458: int len;
459: TS_MSG_IMPRINT *msg_imprint = NULL;
460: X509_ALGOR *algo = NULL;
461: unsigned char *data = NULL;
462: ASN1_OBJECT *policy_obj = NULL;
463: ASN1_INTEGER *nonce_asn1 = NULL;
464:
465: /* Setting default message digest. */
466: if (!md && !(md = EVP_get_digestbyname("sha1")))
467: goto err;
468:
469: /* Creating request object. */
470: if (!(ts_req = TS_REQ_new()))
471: goto err;
472:
473: /* Setting version. */
474: if (!TS_REQ_set_version(ts_req, 1))
475: goto err;
476:
477: /* Creating and adding MSG_IMPRINT object. */
478: if (!(msg_imprint = TS_MSG_IMPRINT_new()))
479: goto err;
480:
481: /* Adding algorithm. */
482: if (!(algo = X509_ALGOR_new()))
483: goto err;
484: if (!(algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))))
485: goto err;
486: if (!(algo->parameter = ASN1_TYPE_new()))
487: goto err;
488: algo->parameter->type = V_ASN1_NULL;
489: if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
490: goto err;
491:
492: /* Adding message digest. */
493: if ((len = create_digest(data_bio, digest, md, &data)) == 0)
494: goto err;
495: if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
496: goto err;
497:
498: if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
499: goto err;
500:
501: /* Setting policy if requested. */
502: if (policy && !(policy_obj = txt2obj(policy)))
503: goto err;
504: if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
505: goto err;
506:
507: /* Setting nonce if requested. */
508: if (!no_nonce && !(nonce_asn1 = create_nonce(NONCE_LENGTH)))
509: goto err;
510: if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
511: goto err;
512:
513: /* Setting certificate request flag if requested. */
514: if (!TS_REQ_set_cert_req(ts_req, cert))
515: goto err;
516:
517: ret = 1;
518:
519: err:
520: if (!ret) {
521: TS_REQ_free(ts_req);
522: ts_req = NULL;
523: BIO_printf(bio_err, "could not create query\n");
524: }
525: TS_MSG_IMPRINT_free(msg_imprint);
526: X509_ALGOR_free(algo);
527: free(data);
528: ASN1_OBJECT_free(policy_obj);
529: ASN1_INTEGER_free(nonce_asn1);
530:
531: return ts_req;
532: }
533:
534: static int
535: create_digest(BIO * input, char *digest, const EVP_MD * md,
536: unsigned char **md_value)
537: {
538: int md_value_len;
539:
540: md_value_len = EVP_MD_size(md);
541: if (md_value_len < 0)
542: goto err;
543: if (input) {
544: /* Digest must be computed from an input file. */
545: EVP_MD_CTX md_ctx;
546: unsigned char buffer[4096];
547: int length;
548:
549: *md_value = malloc(md_value_len);
550: if (*md_value == 0)
551: goto err;
552:
553: EVP_DigestInit(&md_ctx, md);
554: while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
555: EVP_DigestUpdate(&md_ctx, buffer, length);
556: }
557: EVP_DigestFinal(&md_ctx, *md_value, NULL);
558: } else {
559: /* Digest bytes are specified with digest. */
560: long digest_len;
561: *md_value = string_to_hex(digest, &digest_len);
562: if (!*md_value || md_value_len != digest_len) {
563: free(*md_value);
564: *md_value = NULL;
565: BIO_printf(bio_err, "bad digest, %d bytes "
566: "must be specified\n", md_value_len);
567: goto err;
568: }
569: }
570:
571: return md_value_len;
572: err:
573: return 0;
574: }
575:
576: static ASN1_INTEGER *
577: create_nonce(int bits)
578: {
579: unsigned char buf[20];
580: ASN1_INTEGER *nonce = NULL;
581: int len = (bits - 1) / 8 + 1;
582: int i;
583:
584: /* Generating random byte sequence. */
585: if (len > (int) sizeof(buf))
586: goto err;
1.3 jsing 587: arc4random_buf(buf, len);
1.1 jsing 588:
589: /* Find the first non-zero byte and creating ASN1_INTEGER object. */
590: for (i = 0; i < len && !buf[i]; ++i)
591: ;
592: if (!(nonce = ASN1_INTEGER_new()))
593: goto err;
594: free(nonce->data);
595: /* Allocate at least one byte. */
596: nonce->length = len - i;
597: if (!(nonce->data = malloc(nonce->length + 1)))
598: goto err;
599: memcpy(nonce->data, buf + i, nonce->length);
600:
601: return nonce;
602:
603: err:
604: BIO_printf(bio_err, "could not create nonce\n");
605: ASN1_INTEGER_free(nonce);
606: return NULL;
607: }
608: /*
609: * Reply-related method definitions.
610: */
611:
612: static int
1.6 ! bcook 613: reply_command(CONF * conf, char *section, char *queryfile,
1.1 jsing 614: char *passin, char *inkey, char *signer, char *chain, const char *policy,
615: char *in, int token_in, char *out, int token_out, int text)
616: {
617: int ret = 0;
618: TS_RESP *response = NULL;
619: BIO *in_bio = NULL;
620: BIO *query_bio = NULL;
621: BIO *inkey_bio = NULL;
622: BIO *signer_bio = NULL;
623: BIO *out_bio = NULL;
624:
625: /* Build response object either from response or query. */
626: if (in != NULL) {
627: if ((in_bio = BIO_new_file(in, "rb")) == NULL)
628: goto end;
629: if (token_in) {
630: /*
631: * We have a ContentInfo (PKCS7) object, add
632: * 'granted' status info around it.
633: */
634: response = read_PKCS7(in_bio);
635: } else {
636: /* We have a ready-made TS_RESP object. */
637: response = d2i_TS_RESP_bio(in_bio, NULL);
638: }
639: } else {
1.6 ! bcook 640: response = create_response(conf, section, queryfile,
1.1 jsing 641: passin, inkey, signer, chain,
642: policy);
643: if (response)
644: BIO_printf(bio_err, "Response has been generated.\n");
645: else
646: BIO_printf(bio_err, "Response is not generated.\n");
647: }
648: if (response == NULL)
649: goto end;
650:
651: /* Write response either in ASN.1 or text format. */
652: if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
653: goto end;
654: if (text) {
655: /* Text output. */
656: if (token_out) {
657: TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
658: if (!TS_TST_INFO_print_bio(out_bio, tst_info))
659: goto end;
660: } else {
661: if (!TS_RESP_print_bio(out_bio, response))
662: goto end;
663: }
664: } else {
665: /* ASN.1 DER output. */
666: if (token_out) {
667: PKCS7 *token = TS_RESP_get_token(response);
668: if (!i2d_PKCS7_bio(out_bio, token))
669: goto end;
670: } else {
671: if (!i2d_TS_RESP_bio(out_bio, response))
672: goto end;
673: }
674: }
675:
676: ret = 1;
677:
678: end:
679: ERR_print_errors(bio_err);
680:
681: /* Clean up. */
682: BIO_free_all(in_bio);
683: BIO_free_all(query_bio);
684: BIO_free_all(inkey_bio);
685: BIO_free_all(signer_bio);
686: BIO_free_all(out_bio);
687: TS_RESP_free(response);
688:
689: return ret;
690: }
691:
692: /* Reads a PKCS7 token and adds default 'granted' status info to it. */
693: static TS_RESP *
694: read_PKCS7(BIO * in_bio)
695: {
696: int ret = 0;
697: PKCS7 *token = NULL;
698: TS_TST_INFO *tst_info = NULL;
699: TS_RESP *resp = NULL;
700: TS_STATUS_INFO *si = NULL;
701:
702: /* Read PKCS7 object and extract the signed time stamp info. */
703: if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
704: goto end;
705: if (!(tst_info = PKCS7_to_TS_TST_INFO(token)))
706: goto end;
707:
708: /* Creating response object. */
709: if (!(resp = TS_RESP_new()))
710: goto end;
711:
712: /* Create granted status info. */
713: if (!(si = TS_STATUS_INFO_new()))
714: goto end;
715: if (!(ASN1_INTEGER_set(si->status, TS_STATUS_GRANTED)))
716: goto end;
717: if (!TS_RESP_set_status_info(resp, si))
718: goto end;
719:
720: /* Setting encapsulated token. */
721: TS_RESP_set_tst_info(resp, token, tst_info);
722: token = NULL; /* Ownership is lost. */
723: tst_info = NULL; /* Ownership is lost. */
724:
725: ret = 1;
726: end:
727: PKCS7_free(token);
728: TS_TST_INFO_free(tst_info);
729: if (!ret) {
730: TS_RESP_free(resp);
731: resp = NULL;
732: }
733: TS_STATUS_INFO_free(si);
734: return resp;
735: }
736:
737: static TS_RESP *
1.6 ! bcook 738: create_response(CONF * conf, const char *section,
1.1 jsing 739: char *queryfile, char *passin, char *inkey,
740: char *signer, char *chain, const char *policy)
741: {
742: int ret = 0;
743: TS_RESP *response = NULL;
744: BIO *query_bio = NULL;
745: TS_RESP_CTX *resp_ctx = NULL;
746:
747: if (!(query_bio = BIO_new_file(queryfile, "rb")))
748: goto end;
749:
750: /* Getting TSA configuration section. */
751: if (!(section = TS_CONF_get_tsa_section(conf, section)))
752: goto end;
753:
754: /* Setting up response generation context. */
755: if (!(resp_ctx = TS_RESP_CTX_new()))
756: goto end;
757:
758: /* Setting serial number provider callback. */
759: if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
760: goto end;
761:
762: /* Setting TSA signer certificate. */
763: if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
764: goto end;
765:
766: /* Setting TSA signer certificate chain. */
767: if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
768: goto end;
769:
770: /* Setting TSA signer private key. */
771: if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
772: goto end;
773:
774: /* Setting default policy OID. */
775: if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
776: goto end;
777:
778: /* Setting acceptable policy OIDs. */
779: if (!TS_CONF_set_policies(conf, section, resp_ctx))
780: goto end;
781:
782: /* Setting the acceptable one-way hash algorithms. */
783: if (!TS_CONF_set_digests(conf, section, resp_ctx))
784: goto end;
785:
786: /* Setting guaranteed time stamp accuracy. */
787: if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
788: goto end;
789:
790: /* Setting the precision of the time. */
791: if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
792: goto end;
793:
794: /* Setting the ordering flaf if requested. */
795: if (!TS_CONF_set_ordering(conf, section, resp_ctx))
796: goto end;
797:
798: /* Setting the TSA name required flag if requested. */
799: if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
800: goto end;
801:
802: /* Setting the ESS cert id chain flag if requested. */
803: if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
804: goto end;
805:
806: /* Creating the response. */
807: if (!(response = TS_RESP_create_response(resp_ctx, query_bio)))
808: goto end;
809:
810: ret = 1;
811: end:
812: if (!ret) {
813: TS_RESP_free(response);
814: response = NULL;
815: }
816: TS_RESP_CTX_free(resp_ctx);
817: BIO_free_all(query_bio);
818:
819: return response;
820: }
821:
822: static ASN1_INTEGER *
823: serial_cb(TS_RESP_CTX * ctx, void *data)
824: {
825: const char *serial_file = (const char *) data;
826: ASN1_INTEGER *serial = next_serial(serial_file);
827:
828: if (!serial) {
829: TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
830: "Error during serial number "
831: "generation.");
832: TS_RESP_CTX_add_failure_info(ctx,
833: TS_INFO_ADD_INFO_NOT_AVAILABLE);
834: } else
835: save_ts_serial(serial_file, serial);
836:
837: return serial;
838: }
839:
840: static ASN1_INTEGER *
841: next_serial(const char *serialfile)
842: {
843: int ret = 0;
844: BIO *in = NULL;
845: ASN1_INTEGER *serial = NULL;
846: BIGNUM *bn = NULL;
847:
848: if (!(serial = ASN1_INTEGER_new()))
849: goto err;
850:
851: if (!(in = BIO_new_file(serialfile, "r"))) {
852: ERR_clear_error();
853: BIO_printf(bio_err, "Warning: could not open file %s for "
854: "reading, using serial number: 1\n", serialfile);
855: if (!ASN1_INTEGER_set(serial, 1))
856: goto err;
857: } else {
858: char buf[1024];
859: if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
860: BIO_printf(bio_err, "unable to load number from %s\n",
861: serialfile);
862: goto err;
863: }
864: if (!(bn = ASN1_INTEGER_to_BN(serial, NULL)))
865: goto err;
866: ASN1_INTEGER_free(serial);
867: serial = NULL;
868: if (!BN_add_word(bn, 1))
869: goto err;
870: if (!(serial = BN_to_ASN1_INTEGER(bn, NULL)))
871: goto err;
872: }
873: ret = 1;
874: err:
875: if (!ret) {
876: ASN1_INTEGER_free(serial);
877: serial = NULL;
878: }
879: BIO_free_all(in);
880: BN_free(bn);
881: return serial;
882: }
883:
884: static int
885: save_ts_serial(const char *serialfile, ASN1_INTEGER * serial)
886: {
887: int ret = 0;
888: BIO *out = NULL;
889:
890: if (!(out = BIO_new_file(serialfile, "w")))
891: goto err;
892: if (i2a_ASN1_INTEGER(out, serial) <= 0)
893: goto err;
894: if (BIO_puts(out, "\n") <= 0)
895: goto err;
896: ret = 1;
897: err:
898: if (!ret)
899: BIO_printf(bio_err, "could not save serial number to %s\n",
900: serialfile);
901: BIO_free_all(out);
902: return ret;
903: }
904:
905: /*
906: * Verify-related method definitions.
907: */
908:
909: static int
910: verify_command(char *data, char *digest, char *queryfile, char *in,
911: int token_in, char *ca_path, char *ca_file, char *untrusted)
912: {
913: BIO *in_bio = NULL;
914: PKCS7 *token = NULL;
915: TS_RESP *response = NULL;
916: TS_VERIFY_CTX *verify_ctx = NULL;
917: int ret = 0;
918:
919: /* Decode the token (PKCS7) or response (TS_RESP) files. */
920: if (!(in_bio = BIO_new_file(in, "rb")))
921: goto end;
922: if (token_in) {
923: if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
924: goto end;
925: } else {
926: if (!(response = d2i_TS_RESP_bio(in_bio, NULL)))
927: goto end;
928: }
929:
930: if (!(verify_ctx = create_verify_ctx(data, digest, queryfile,
931: ca_path, ca_file, untrusted)))
932: goto end;
933:
934: /* Checking the token or response against the request. */
935: ret = token_in ?
936: TS_RESP_verify_token(verify_ctx, token) :
937: TS_RESP_verify_response(verify_ctx, response);
938:
939: end:
940: printf("Verification: ");
941: if (ret)
942: printf("OK\n");
943: else {
944: printf("FAILED\n");
945: /* Print errors, if there are any. */
946: ERR_print_errors(bio_err);
947: }
948:
949: /* Clean up. */
950: BIO_free_all(in_bio);
951: PKCS7_free(token);
952: TS_RESP_free(response);
953: TS_VERIFY_CTX_free(verify_ctx);
954: return ret;
955: }
956:
957: static TS_VERIFY_CTX *
958: create_verify_ctx(char *data, char *digest, char *queryfile, char *ca_path,
959: char *ca_file, char *untrusted)
960: {
961: TS_VERIFY_CTX *ctx = NULL;
962: BIO *input = NULL;
963: TS_REQ *request = NULL;
964: int ret = 0;
965:
966: if (data != NULL || digest != NULL) {
967: if (!(ctx = TS_VERIFY_CTX_new()))
968: goto err;
969: ctx->flags = TS_VFY_VERSION | TS_VFY_SIGNER;
970: if (data != NULL) {
971: ctx->flags |= TS_VFY_DATA;
972: if (!(ctx->data = BIO_new_file(data, "rb")))
973: goto err;
974: } else if (digest != NULL) {
975: long imprint_len;
976: ctx->flags |= TS_VFY_IMPRINT;
977: if (!(ctx->imprint = string_to_hex(digest,
978: &imprint_len))) {
979: BIO_printf(bio_err, "invalid digest string\n");
980: goto err;
981: }
982: ctx->imprint_len = imprint_len;
983: }
984: } else if (queryfile != NULL) {
985: /*
986: * The request has just to be read, decoded and converted to
987: * a verify context object.
988: */
989: if (!(input = BIO_new_file(queryfile, "rb")))
990: goto err;
991: if (!(request = d2i_TS_REQ_bio(input, NULL)))
992: goto err;
993: if (!(ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)))
994: goto err;
995: } else
996: return NULL;
997:
998: /* Add the signature verification flag and arguments. */
999: ctx->flags |= TS_VFY_SIGNATURE;
1000:
1001: /* Initialising the X509_STORE object. */
1002: if (!(ctx->store = create_cert_store(ca_path, ca_file)))
1003: goto err;
1004:
1005: /* Loading untrusted certificates. */
1006: if (untrusted && !(ctx->certs = TS_CONF_load_certs(untrusted)))
1007: goto err;
1008:
1009: ret = 1;
1010: err:
1011: if (!ret) {
1012: TS_VERIFY_CTX_free(ctx);
1013: ctx = NULL;
1014: }
1015: BIO_free_all(input);
1016: TS_REQ_free(request);
1017: return ctx;
1018: }
1019:
1020: static X509_STORE *
1021: create_cert_store(char *ca_path, char *ca_file)
1022: {
1023: X509_STORE *cert_ctx = NULL;
1024: X509_LOOKUP *lookup = NULL;
1025: int i;
1026:
1027: /* Creating the X509_STORE object. */
1028: cert_ctx = X509_STORE_new();
1029:
1030: /* Setting the callback for certificate chain verification. */
1031: X509_STORE_set_verify_cb(cert_ctx, verify_cb);
1032:
1033: /* Adding a trusted certificate directory source. */
1034: if (ca_path) {
1035: lookup = X509_STORE_add_lookup(cert_ctx,
1036: X509_LOOKUP_hash_dir());
1037: if (lookup == NULL) {
1038: BIO_printf(bio_err, "memory allocation failure\n");
1039: goto err;
1040: }
1041: i = X509_LOOKUP_add_dir(lookup, ca_path, X509_FILETYPE_PEM);
1042: if (!i) {
1043: BIO_printf(bio_err, "Error loading directory %s\n",
1044: ca_path);
1045: goto err;
1046: }
1047: }
1048: /* Adding a trusted certificate file source. */
1049: if (ca_file) {
1050: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
1051: if (lookup == NULL) {
1052: BIO_printf(bio_err, "memory allocation failure\n");
1053: goto err;
1054: }
1055: i = X509_LOOKUP_load_file(lookup, ca_file, X509_FILETYPE_PEM);
1056: if (!i) {
1057: BIO_printf(bio_err, "Error loading file %s\n", ca_file);
1058: goto err;
1059: }
1060: }
1061: return cert_ctx;
1062: err:
1063: X509_STORE_free(cert_ctx);
1064: return NULL;
1065: }
1066:
1067: static int
1068: verify_cb(int ok, X509_STORE_CTX * ctx)
1069: {
1070: /*
1071: char buf[256];
1072:
1073: if (!ok)
1074: {
1075: X509_NAME_oneline(X509_get_subject_name(ctx->current_cert),
1076: buf, sizeof(buf));
1077: printf("%s\n", buf);
1078: printf("error %d at %d depth lookup: %s\n",
1079: ctx->error, ctx->error_depth,
1080: X509_verify_cert_error_string(ctx->error));
1081: }
1082: */
1083:
1084: return ok;
1085: }
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