Annotation of src/usr.bin/openssl/ts.c, Revision 1.16
1.16 ! tb 1: /* $OpenBSD: ts.c,v 1.15 2018/02/07 05:47:55 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;
1.11 doug 151:
152: if (single_execution) {
1.14 deraadt 153: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
1.11 doug 154: perror("pledge");
1.13 doug 155: exit(1);
156: }
1.11 doug 157: }
1.1 jsing 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 ((md = EVP_get_digestbyname(*argv + 1)) != NULL) {
243: /* empty. */
244: } else
245: goto usage;
246: }
247:
248: /* Get the password if required. */
249: if (mode == CMD_REPLY && passin &&
250: !app_passwd(bio_err, passin, NULL, &password, NULL)) {
251: BIO_printf(bio_err, "Error getting password.\n");
252: goto cleanup;
253: }
254: /*
255: * Check consistency of parameters and execute the appropriate
256: * function.
257: */
258: switch (mode) {
259: case CMD_NONE:
260: goto usage;
261: case CMD_QUERY:
262: /*
263: * Data file and message imprint cannot be specified at the
264: * same time.
265: */
266: ret = data != NULL && digest != NULL;
267: if (ret)
268: goto usage;
269: /* Load the config file for possible policy OIDs. */
270: conf = load_config_file(configfile);
271: ret = !query_command(data, digest, md, policy, no_nonce, cert,
272: in, out, text);
273: break;
274: case CMD_REPLY:
275: conf = load_config_file(configfile);
276: if (in == NULL) {
277: ret = !(queryfile != NULL && conf != NULL && !token_in);
278: if (ret)
279: goto usage;
280: } else {
281: /* 'in' and 'queryfile' are exclusive. */
282: ret = !(queryfile == NULL);
283: if (ret)
284: goto usage;
285: }
286:
1.6 bcook 287: ret = !reply_command(conf, section, queryfile,
1.1 jsing 288: password, inkey, signer, chain, policy,
289: in, token_in, out, token_out, text);
290: break;
291: case CMD_VERIFY:
292: ret = !(((queryfile && !data && !digest) ||
293: (!queryfile && data && !digest) ||
294: (!queryfile && !data && digest)) && in != NULL);
295: if (ret)
296: goto usage;
297:
298: ret = !verify_command(data, digest, queryfile, in, token_in,
299: ca_path, ca_file, untrusted);
300: }
301:
302: goto cleanup;
303:
1.15 jsing 304: usage:
1.1 jsing 305: BIO_printf(bio_err, "usage:\n"
306: "ts -query [-config configfile] "
307: "[-data file_to_hash] [-digest digest_bytes]"
1.10 bcook 308: "[-md4|-md5|-sha1|-ripemd160] "
1.1 jsing 309: "[-policy object_id] [-no_nonce] [-cert] "
310: "[-in request.tsq] [-out request.tsq] [-text]\n");
311: BIO_printf(bio_err, "or\n"
312: "ts -reply [-config configfile] [-section tsa_section] "
313: "[-queryfile request.tsq] [-passin password] "
314: "[-signer tsa_cert.pem] [-inkey private_key.pem] "
315: "[-chain certs_file.pem] [-policy object_id] "
316: "[-in response.tsr] [-token_in] "
1.6 bcook 317: "[-out response.tsr] [-token_out] [-text]\n");
1.1 jsing 318: BIO_printf(bio_err, "or\n"
319: "ts -verify [-data file_to_hash] [-digest digest_bytes] "
320: "[-queryfile request.tsq] "
321: "-in response.tsr [-token_in] "
322: "-CApath ca_path -CAfile ca_file.pem "
323: "-untrusted cert_file.pem\n");
324:
1.15 jsing 325: cleanup:
1.1 jsing 326: /* Clean up. */
327: NCONF_free(conf);
328: free(password);
329: OBJ_cleanup();
330:
331: return (ret);
332: }
333:
334: /*
335: * Configuration file-related function definitions.
336: */
337:
338: static ASN1_OBJECT *
339: txt2obj(const char *oid)
340: {
341: ASN1_OBJECT *oid_obj = NULL;
342:
343: if (!(oid_obj = OBJ_txt2obj(oid, 0)))
344: BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
345:
346: return oid_obj;
347: }
348:
349: static CONF *
350: load_config_file(const char *configfile)
351: {
352: CONF *conf = NULL;
353: long errorline = -1;
354:
355: if (!configfile)
356: configfile = getenv("OPENSSL_CONF");
357:
358: if (configfile &&
359: (!(conf = NCONF_new(NULL)) ||
360: NCONF_load(conf, configfile, &errorline) <= 0)) {
361: if (errorline <= 0)
362: BIO_printf(bio_err, "error loading the config file "
363: "'%s'\n", configfile);
364: else
365: BIO_printf(bio_err, "error on line %ld of config file "
366: "'%s'\n", errorline, configfile);
367: }
368: if (conf != NULL) {
369: const char *p;
370:
371: BIO_printf(bio_err, "Using configuration from %s\n",
372: configfile);
373: p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
374: if (p != NULL) {
375: BIO *oid_bio = BIO_new_file(p, "r");
376: if (!oid_bio)
377: ERR_print_errors(bio_err);
378: else {
379: OBJ_create_objects(oid_bio);
380: BIO_free_all(oid_bio);
381: }
382: } else
383: ERR_clear_error();
384: if (!add_oid_section(bio_err, conf))
385: ERR_print_errors(bio_err);
386: }
387: return conf;
388: }
389:
390: /*
391: * Query-related method definitions.
392: */
393:
394: static int
395: query_command(const char *data, char *digest, const EVP_MD * md,
396: const char *policy, int no_nonce, int cert, const char *in,
397: const char *out, int text)
398: {
399: int ret = 0;
400: TS_REQ *query = NULL;
401: BIO *in_bio = NULL;
402: BIO *data_bio = NULL;
403: BIO *out_bio = NULL;
404:
405: /* Build query object either from file or from scratch. */
406: if (in != NULL) {
407: if ((in_bio = BIO_new_file(in, "rb")) == NULL)
408: goto end;
409: query = d2i_TS_REQ_bio(in_bio, NULL);
410: } else {
411: /* Open the file if no explicit digest bytes were specified. */
412: if (!digest &&
413: !(data_bio = BIO_open_with_default(data, "rb", stdin)))
414: goto end;
415: /* Creating the query object. */
416: query = create_query(data_bio, digest, md,
417: policy, no_nonce, cert);
418: /* Saving the random number generator state. */
419: }
420: if (query == NULL)
421: goto end;
422:
423: /* Write query either in ASN.1 or in text format. */
424: if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
425: goto end;
426: if (text) {
427: /* Text output. */
428: if (!TS_REQ_print_bio(out_bio, query))
429: goto end;
430: } else {
431: /* ASN.1 output. */
432: if (!i2d_TS_REQ_bio(out_bio, query))
433: goto end;
434: }
435:
436: ret = 1;
437:
1.15 jsing 438: end:
1.1 jsing 439: ERR_print_errors(bio_err);
440:
441: /* Clean up. */
442: BIO_free_all(in_bio);
443: BIO_free_all(data_bio);
444: BIO_free_all(out_bio);
445: TS_REQ_free(query);
446:
447: return ret;
448: }
449:
450: static BIO *
451: BIO_open_with_default(const char *file, const char *mode, FILE * default_fp)
452: {
453: return file == NULL ? BIO_new_fp(default_fp, BIO_NOCLOSE) :
454: BIO_new_file(file, mode);
455: }
456:
457: static TS_REQ *
458: create_query(BIO * data_bio, char *digest, const EVP_MD * md,
459: const char *policy, int no_nonce, int cert)
460: {
461: int ret = 0;
462: TS_REQ *ts_req = NULL;
463: int len;
464: TS_MSG_IMPRINT *msg_imprint = NULL;
465: X509_ALGOR *algo = NULL;
466: unsigned char *data = NULL;
467: ASN1_OBJECT *policy_obj = NULL;
468: ASN1_INTEGER *nonce_asn1 = NULL;
469:
470: /* Setting default message digest. */
471: if (!md && !(md = EVP_get_digestbyname("sha1")))
472: goto err;
473:
474: /* Creating request object. */
475: if (!(ts_req = TS_REQ_new()))
476: goto err;
477:
478: /* Setting version. */
479: if (!TS_REQ_set_version(ts_req, 1))
480: goto err;
481:
482: /* Creating and adding MSG_IMPRINT object. */
483: if (!(msg_imprint = TS_MSG_IMPRINT_new()))
484: goto err;
485:
486: /* Adding algorithm. */
487: if (!(algo = X509_ALGOR_new()))
488: goto err;
489: if (!(algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))))
490: goto err;
491: if (!(algo->parameter = ASN1_TYPE_new()))
492: goto err;
493: algo->parameter->type = V_ASN1_NULL;
494: if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
495: goto err;
496:
497: /* Adding message digest. */
498: if ((len = create_digest(data_bio, digest, md, &data)) == 0)
499: goto err;
500: if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
501: goto err;
502:
503: if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
504: goto err;
505:
506: /* Setting policy if requested. */
507: if (policy && !(policy_obj = txt2obj(policy)))
508: goto err;
509: if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
510: goto err;
511:
512: /* Setting nonce if requested. */
513: if (!no_nonce && !(nonce_asn1 = create_nonce(NONCE_LENGTH)))
514: goto err;
515: if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
516: goto err;
517:
518: /* Setting certificate request flag if requested. */
519: if (!TS_REQ_set_cert_req(ts_req, cert))
520: goto err;
521:
522: ret = 1;
523:
1.15 jsing 524: err:
1.1 jsing 525: if (!ret) {
526: TS_REQ_free(ts_req);
527: ts_req = NULL;
528: BIO_printf(bio_err, "could not create query\n");
529: }
530: TS_MSG_IMPRINT_free(msg_imprint);
531: X509_ALGOR_free(algo);
532: free(data);
533: ASN1_OBJECT_free(policy_obj);
534: ASN1_INTEGER_free(nonce_asn1);
535:
536: return ts_req;
537: }
538:
539: static int
540: create_digest(BIO * input, char *digest, const EVP_MD * md,
541: unsigned char **md_value)
542: {
543: int md_value_len;
544:
545: md_value_len = EVP_MD_size(md);
546: if (md_value_len < 0)
547: goto err;
548: if (input) {
549: /* Digest must be computed from an input file. */
1.16 ! tb 550: EVP_MD_CTX *md_ctx;
1.1 jsing 551: unsigned char buffer[4096];
552: int length;
553:
554: *md_value = malloc(md_value_len);
555: if (*md_value == 0)
556: goto err;
557:
1.16 ! tb 558: if ((md_ctx = EVP_MD_CTX_new()) == NULL)
! 559: goto err;
! 560:
! 561: EVP_DigestInit(md_ctx, md);
1.1 jsing 562: while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
1.16 ! tb 563: EVP_DigestUpdate(md_ctx, buffer, length);
1.1 jsing 564: }
1.16 ! tb 565: EVP_DigestFinal(md_ctx, *md_value, NULL);
! 566:
! 567: EVP_MD_CTX_free(md_ctx);
1.1 jsing 568: } else {
569: /* Digest bytes are specified with digest. */
570: long digest_len;
571: *md_value = string_to_hex(digest, &digest_len);
572: if (!*md_value || md_value_len != digest_len) {
573: free(*md_value);
574: *md_value = NULL;
575: BIO_printf(bio_err, "bad digest, %d bytes "
576: "must be specified\n", md_value_len);
577: goto err;
578: }
579: }
580:
581: return md_value_len;
1.15 jsing 582: err:
1.1 jsing 583: return 0;
584: }
585:
586: static ASN1_INTEGER *
587: create_nonce(int bits)
588: {
589: unsigned char buf[20];
590: ASN1_INTEGER *nonce = NULL;
591: int len = (bits - 1) / 8 + 1;
592: int i;
593:
594: /* Generating random byte sequence. */
595: if (len > (int) sizeof(buf))
596: goto err;
1.3 jsing 597: arc4random_buf(buf, len);
1.1 jsing 598:
599: /* Find the first non-zero byte and creating ASN1_INTEGER object. */
600: for (i = 0; i < len && !buf[i]; ++i)
601: ;
602: if (!(nonce = ASN1_INTEGER_new()))
603: goto err;
604: free(nonce->data);
605: /* Allocate at least one byte. */
606: nonce->length = len - i;
607: if (!(nonce->data = malloc(nonce->length + 1)))
608: goto err;
609: memcpy(nonce->data, buf + i, nonce->length);
610:
611: return nonce;
612:
1.15 jsing 613: err:
1.1 jsing 614: BIO_printf(bio_err, "could not create nonce\n");
615: ASN1_INTEGER_free(nonce);
616: return NULL;
617: }
618: /*
619: * Reply-related method definitions.
620: */
621:
622: static int
1.6 bcook 623: reply_command(CONF * conf, char *section, char *queryfile,
1.1 jsing 624: char *passin, char *inkey, char *signer, char *chain, const char *policy,
625: char *in, int token_in, char *out, int token_out, int text)
626: {
627: int ret = 0;
628: TS_RESP *response = NULL;
629: BIO *in_bio = NULL;
630: BIO *query_bio = NULL;
631: BIO *inkey_bio = NULL;
632: BIO *signer_bio = NULL;
633: BIO *out_bio = NULL;
634:
635: /* Build response object either from response or query. */
636: if (in != NULL) {
637: if ((in_bio = BIO_new_file(in, "rb")) == NULL)
638: goto end;
639: if (token_in) {
640: /*
641: * We have a ContentInfo (PKCS7) object, add
642: * 'granted' status info around it.
643: */
644: response = read_PKCS7(in_bio);
645: } else {
646: /* We have a ready-made TS_RESP object. */
647: response = d2i_TS_RESP_bio(in_bio, NULL);
648: }
649: } else {
1.6 bcook 650: response = create_response(conf, section, queryfile,
1.1 jsing 651: passin, inkey, signer, chain,
652: policy);
653: if (response)
654: BIO_printf(bio_err, "Response has been generated.\n");
655: else
656: BIO_printf(bio_err, "Response is not generated.\n");
657: }
658: if (response == NULL)
659: goto end;
660:
661: /* Write response either in ASN.1 or text format. */
662: if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
663: goto end;
664: if (text) {
665: /* Text output. */
666: if (token_out) {
667: TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
668: if (!TS_TST_INFO_print_bio(out_bio, tst_info))
669: goto end;
670: } else {
671: if (!TS_RESP_print_bio(out_bio, response))
672: goto end;
673: }
674: } else {
675: /* ASN.1 DER output. */
676: if (token_out) {
677: PKCS7 *token = TS_RESP_get_token(response);
678: if (!i2d_PKCS7_bio(out_bio, token))
679: goto end;
680: } else {
681: if (!i2d_TS_RESP_bio(out_bio, response))
682: goto end;
683: }
684: }
685:
686: ret = 1;
687:
1.15 jsing 688: end:
1.1 jsing 689: ERR_print_errors(bio_err);
690:
691: /* Clean up. */
692: BIO_free_all(in_bio);
693: BIO_free_all(query_bio);
694: BIO_free_all(inkey_bio);
695: BIO_free_all(signer_bio);
696: BIO_free_all(out_bio);
697: TS_RESP_free(response);
698:
699: return ret;
700: }
701:
702: /* Reads a PKCS7 token and adds default 'granted' status info to it. */
703: static TS_RESP *
704: read_PKCS7(BIO * in_bio)
705: {
706: int ret = 0;
707: PKCS7 *token = NULL;
708: TS_TST_INFO *tst_info = NULL;
709: TS_RESP *resp = NULL;
710: TS_STATUS_INFO *si = NULL;
711:
712: /* Read PKCS7 object and extract the signed time stamp info. */
713: if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
714: goto end;
715: if (!(tst_info = PKCS7_to_TS_TST_INFO(token)))
716: goto end;
717:
718: /* Creating response object. */
719: if (!(resp = TS_RESP_new()))
720: goto end;
721:
722: /* Create granted status info. */
723: if (!(si = TS_STATUS_INFO_new()))
724: goto end;
725: if (!(ASN1_INTEGER_set(si->status, TS_STATUS_GRANTED)))
726: goto end;
727: if (!TS_RESP_set_status_info(resp, si))
728: goto end;
729:
730: /* Setting encapsulated token. */
731: TS_RESP_set_tst_info(resp, token, tst_info);
732: token = NULL; /* Ownership is lost. */
733: tst_info = NULL; /* Ownership is lost. */
734:
735: ret = 1;
1.15 jsing 736: end:
1.1 jsing 737: PKCS7_free(token);
738: TS_TST_INFO_free(tst_info);
739: if (!ret) {
740: TS_RESP_free(resp);
741: resp = NULL;
742: }
743: TS_STATUS_INFO_free(si);
744: return resp;
745: }
746:
747: static TS_RESP *
1.6 bcook 748: create_response(CONF * conf, const char *section,
1.1 jsing 749: char *queryfile, char *passin, char *inkey,
750: char *signer, char *chain, const char *policy)
751: {
752: int ret = 0;
753: TS_RESP *response = NULL;
754: BIO *query_bio = NULL;
755: TS_RESP_CTX *resp_ctx = NULL;
756:
757: if (!(query_bio = BIO_new_file(queryfile, "rb")))
758: goto end;
759:
760: /* Getting TSA configuration section. */
761: if (!(section = TS_CONF_get_tsa_section(conf, section)))
762: goto end;
763:
764: /* Setting up response generation context. */
765: if (!(resp_ctx = TS_RESP_CTX_new()))
766: goto end;
767:
768: /* Setting serial number provider callback. */
769: if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
770: goto end;
771:
772: /* Setting TSA signer certificate. */
773: if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
774: goto end;
775:
776: /* Setting TSA signer certificate chain. */
777: if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
778: goto end;
779:
780: /* Setting TSA signer private key. */
781: if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
782: goto end;
783:
784: /* Setting default policy OID. */
785: if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
786: goto end;
787:
788: /* Setting acceptable policy OIDs. */
789: if (!TS_CONF_set_policies(conf, section, resp_ctx))
790: goto end;
791:
792: /* Setting the acceptable one-way hash algorithms. */
793: if (!TS_CONF_set_digests(conf, section, resp_ctx))
794: goto end;
795:
796: /* Setting guaranteed time stamp accuracy. */
797: if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
798: goto end;
799:
800: /* Setting the precision of the time. */
801: if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
802: goto end;
803:
804: /* Setting the ordering flaf if requested. */
805: if (!TS_CONF_set_ordering(conf, section, resp_ctx))
806: goto end;
807:
808: /* Setting the TSA name required flag if requested. */
809: if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
810: goto end;
811:
812: /* Setting the ESS cert id chain flag if requested. */
813: if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
814: goto end;
815:
816: /* Creating the response. */
817: if (!(response = TS_RESP_create_response(resp_ctx, query_bio)))
818: goto end;
819:
820: ret = 1;
1.15 jsing 821: end:
1.1 jsing 822: if (!ret) {
823: TS_RESP_free(response);
824: response = NULL;
825: }
826: TS_RESP_CTX_free(resp_ctx);
827: BIO_free_all(query_bio);
828:
829: return response;
830: }
831:
832: static ASN1_INTEGER *
833: serial_cb(TS_RESP_CTX * ctx, void *data)
834: {
835: const char *serial_file = (const char *) data;
836: ASN1_INTEGER *serial = next_serial(serial_file);
837:
838: if (!serial) {
839: TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
840: "Error during serial number "
841: "generation.");
842: TS_RESP_CTX_add_failure_info(ctx,
843: TS_INFO_ADD_INFO_NOT_AVAILABLE);
844: } else
845: save_ts_serial(serial_file, serial);
846:
847: return serial;
848: }
849:
850: static ASN1_INTEGER *
851: next_serial(const char *serialfile)
852: {
853: int ret = 0;
854: BIO *in = NULL;
855: ASN1_INTEGER *serial = NULL;
856: BIGNUM *bn = NULL;
857:
858: if (!(serial = ASN1_INTEGER_new()))
859: goto err;
860:
861: if (!(in = BIO_new_file(serialfile, "r"))) {
862: ERR_clear_error();
863: BIO_printf(bio_err, "Warning: could not open file %s for "
864: "reading, using serial number: 1\n", serialfile);
865: if (!ASN1_INTEGER_set(serial, 1))
866: goto err;
867: } else {
868: char buf[1024];
869: if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
870: BIO_printf(bio_err, "unable to load number from %s\n",
871: serialfile);
872: goto err;
873: }
874: if (!(bn = ASN1_INTEGER_to_BN(serial, NULL)))
875: goto err;
876: ASN1_INTEGER_free(serial);
877: serial = NULL;
878: if (!BN_add_word(bn, 1))
879: goto err;
880: if (!(serial = BN_to_ASN1_INTEGER(bn, NULL)))
881: goto err;
882: }
883: ret = 1;
1.15 jsing 884: err:
1.1 jsing 885: if (!ret) {
886: ASN1_INTEGER_free(serial);
887: serial = NULL;
888: }
889: BIO_free_all(in);
890: BN_free(bn);
891: return serial;
892: }
893:
894: static int
895: save_ts_serial(const char *serialfile, ASN1_INTEGER * serial)
896: {
897: int ret = 0;
898: BIO *out = NULL;
899:
900: if (!(out = BIO_new_file(serialfile, "w")))
901: goto err;
902: if (i2a_ASN1_INTEGER(out, serial) <= 0)
903: goto err;
904: if (BIO_puts(out, "\n") <= 0)
905: goto err;
906: ret = 1;
1.15 jsing 907: err:
1.1 jsing 908: if (!ret)
909: BIO_printf(bio_err, "could not save serial number to %s\n",
910: serialfile);
911: BIO_free_all(out);
912: return ret;
913: }
914:
915: /*
916: * Verify-related method definitions.
917: */
918:
919: static int
920: verify_command(char *data, char *digest, char *queryfile, char *in,
921: int token_in, char *ca_path, char *ca_file, char *untrusted)
922: {
923: BIO *in_bio = NULL;
924: PKCS7 *token = NULL;
925: TS_RESP *response = NULL;
926: TS_VERIFY_CTX *verify_ctx = NULL;
927: int ret = 0;
928:
929: /* Decode the token (PKCS7) or response (TS_RESP) files. */
930: if (!(in_bio = BIO_new_file(in, "rb")))
931: goto end;
932: if (token_in) {
933: if (!(token = d2i_PKCS7_bio(in_bio, NULL)))
934: goto end;
935: } else {
936: if (!(response = d2i_TS_RESP_bio(in_bio, NULL)))
937: goto end;
938: }
939:
940: if (!(verify_ctx = create_verify_ctx(data, digest, queryfile,
941: ca_path, ca_file, untrusted)))
942: goto end;
943:
944: /* Checking the token or response against the request. */
945: ret = token_in ?
946: TS_RESP_verify_token(verify_ctx, token) :
947: TS_RESP_verify_response(verify_ctx, response);
948:
1.15 jsing 949: end:
1.1 jsing 950: printf("Verification: ");
951: if (ret)
952: printf("OK\n");
953: else {
954: printf("FAILED\n");
955: /* Print errors, if there are any. */
956: ERR_print_errors(bio_err);
957: }
958:
959: /* Clean up. */
960: BIO_free_all(in_bio);
961: PKCS7_free(token);
962: TS_RESP_free(response);
963: TS_VERIFY_CTX_free(verify_ctx);
964: return ret;
965: }
966:
967: static TS_VERIFY_CTX *
968: create_verify_ctx(char *data, char *digest, char *queryfile, char *ca_path,
969: char *ca_file, char *untrusted)
970: {
971: TS_VERIFY_CTX *ctx = NULL;
972: BIO *input = NULL;
973: TS_REQ *request = NULL;
974: int ret = 0;
975:
976: if (data != NULL || digest != NULL) {
977: if (!(ctx = TS_VERIFY_CTX_new()))
978: goto err;
979: ctx->flags = TS_VFY_VERSION | TS_VFY_SIGNER;
980: if (data != NULL) {
981: ctx->flags |= TS_VFY_DATA;
982: if (!(ctx->data = BIO_new_file(data, "rb")))
983: goto err;
984: } else if (digest != NULL) {
985: long imprint_len;
986: ctx->flags |= TS_VFY_IMPRINT;
987: if (!(ctx->imprint = string_to_hex(digest,
988: &imprint_len))) {
989: BIO_printf(bio_err, "invalid digest string\n");
990: goto err;
991: }
992: ctx->imprint_len = imprint_len;
993: }
994: } else if (queryfile != NULL) {
995: /*
996: * The request has just to be read, decoded and converted to
997: * a verify context object.
998: */
999: if (!(input = BIO_new_file(queryfile, "rb")))
1000: goto err;
1001: if (!(request = d2i_TS_REQ_bio(input, NULL)))
1002: goto err;
1003: if (!(ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)))
1004: goto err;
1005: } else
1006: return NULL;
1007:
1008: /* Add the signature verification flag and arguments. */
1009: ctx->flags |= TS_VFY_SIGNATURE;
1010:
1011: /* Initialising the X509_STORE object. */
1012: if (!(ctx->store = create_cert_store(ca_path, ca_file)))
1013: goto err;
1014:
1015: /* Loading untrusted certificates. */
1016: if (untrusted && !(ctx->certs = TS_CONF_load_certs(untrusted)))
1017: goto err;
1018:
1019: ret = 1;
1.15 jsing 1020: err:
1.1 jsing 1021: if (!ret) {
1022: TS_VERIFY_CTX_free(ctx);
1023: ctx = NULL;
1024: }
1025: BIO_free_all(input);
1026: TS_REQ_free(request);
1027: return ctx;
1028: }
1029:
1030: static X509_STORE *
1031: create_cert_store(char *ca_path, char *ca_file)
1032: {
1033: X509_STORE *cert_ctx = NULL;
1034: X509_LOOKUP *lookup = NULL;
1035: int i;
1036:
1037: /* Creating the X509_STORE object. */
1038: cert_ctx = X509_STORE_new();
1039:
1040: /* Setting the callback for certificate chain verification. */
1041: X509_STORE_set_verify_cb(cert_ctx, verify_cb);
1042:
1043: /* Adding a trusted certificate directory source. */
1044: if (ca_path) {
1045: lookup = X509_STORE_add_lookup(cert_ctx,
1046: X509_LOOKUP_hash_dir());
1047: if (lookup == NULL) {
1048: BIO_printf(bio_err, "memory allocation failure\n");
1049: goto err;
1050: }
1051: i = X509_LOOKUP_add_dir(lookup, ca_path, X509_FILETYPE_PEM);
1052: if (!i) {
1053: BIO_printf(bio_err, "Error loading directory %s\n",
1054: ca_path);
1055: goto err;
1056: }
1057: }
1058: /* Adding a trusted certificate file source. */
1059: if (ca_file) {
1060: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
1061: if (lookup == NULL) {
1062: BIO_printf(bio_err, "memory allocation failure\n");
1063: goto err;
1064: }
1065: i = X509_LOOKUP_load_file(lookup, ca_file, X509_FILETYPE_PEM);
1066: if (!i) {
1067: BIO_printf(bio_err, "Error loading file %s\n", ca_file);
1068: goto err;
1069: }
1070: }
1071: return cert_ctx;
1.15 jsing 1072: err:
1.1 jsing 1073: X509_STORE_free(cert_ctx);
1074: return NULL;
1075: }
1076:
1077: static int
1078: verify_cb(int ok, X509_STORE_CTX * ctx)
1079: {
1080: /*
1081: char buf[256];
1082:
1083: if (!ok)
1084: {
1085: X509_NAME_oneline(X509_get_subject_name(ctx->current_cert),
1086: buf, sizeof(buf));
1087: printf("%s\n", buf);
1088: printf("error %d at %d depth lookup: %s\n",
1089: ctx->error, ctx->error_depth,
1090: X509_verify_cert_error_string(ctx->error));
1091: }
1092: */
1093:
1094: return ok;
1095: }
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