Annotation of src/usr.bin/openssl/verify.c, Revision 1.17
1.17 ! tb 1: /* $OpenBSD: verify.c,v 1.16 2023/03/06 14:32:06 tb Exp $ */
1.1 jsing 2: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3: * All rights reserved.
4: *
5: * This package is an SSL implementation written
6: * by Eric Young (eay@cryptsoft.com).
7: * The implementation was written so as to conform with Netscapes SSL.
8: *
9: * This library is free for commercial and non-commercial use as long as
10: * the following conditions are aheared to. The following conditions
11: * apply to all code found in this distribution, be it the RC4, RSA,
12: * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13: * included with this distribution is covered by the same copyright terms
14: * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15: *
16: * Copyright remains Eric Young's, and as such any Copyright notices in
17: * the code are not to be removed.
18: * If this package is used in a product, Eric Young should be given attribution
19: * as the author of the parts of the library used.
20: * This can be in the form of a textual message at program startup or
21: * in documentation (online or textual) provided with the package.
22: *
23: * Redistribution and use in source and binary forms, with or without
24: * modification, are permitted provided that the following conditions
25: * are met:
26: * 1. Redistributions of source code must retain the copyright
27: * notice, this list of conditions and the following disclaimer.
28: * 2. Redistributions in binary form must reproduce the above copyright
29: * notice, this list of conditions and the following disclaimer in the
30: * documentation and/or other materials provided with the distribution.
31: * 3. All advertising materials mentioning features or use of this software
32: * must display the following acknowledgement:
33: * "This product includes cryptographic software written by
34: * Eric Young (eay@cryptsoft.com)"
35: * The word 'cryptographic' can be left out if the rouines from the library
36: * being used are not cryptographic related :-).
37: * 4. If you include any Windows specific code (or a derivative thereof) from
38: * the apps directory (application code) you must include an acknowledgement:
39: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40: *
41: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51: * SUCH DAMAGE.
52: *
53: * The licence and distribution terms for any publically available version or
54: * derivative of this code cannot be changed. i.e. this code cannot simply be
55: * copied and put under another distribution licence
56: * [including the GNU Public Licence.]
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/err.h>
67: #include <openssl/pem.h>
68: #include <openssl/x509.h>
69: #include <openssl/x509v3.h>
70:
1.11 tb 71: static int cb(int ok, X509_STORE_CTX *ctx);
72: static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain,
73: STACK_OF(X509) *tchain, STACK_OF(X509_CRL) *crls);
1.8 jsing 74: static int vflags = 0;
75:
76: static struct {
77: char *CAfile;
78: char *CApath;
79: char *crlfile;
80: char *trustfile;
81: char *untfile;
82: int verbose;
83: X509_VERIFY_PARAM *vpm;
1.16 tb 84: } cfg;
1.8 jsing 85:
86: static int
87: verify_opt_args(int argc, char **argv, int *argsused)
88: {
89: int oargc = argc;
90: int badarg = 0;
91:
1.16 tb 92: if (!args_verify(&argv, &argc, &badarg, bio_err, &cfg.vpm))
1.8 jsing 93: return (1);
94: if (badarg)
95: return (1);
96:
97: *argsused = oargc - argc;
98:
99: return (0);
100: }
101:
102: static const struct option verify_options[] = {
103: {
104: .name = "CAfile",
105: .argname = "file",
106: .desc = "Certificate Authority file",
107: .type = OPTION_ARG,
1.16 tb 108: .opt.arg = &cfg.CAfile,
1.8 jsing 109: },
110: {
111: .name = "CApath",
112: .argname = "path",
113: .desc = "Certificate Authority path",
114: .type = OPTION_ARG,
1.16 tb 115: .opt.arg = &cfg.CApath,
1.8 jsing 116: },
117: {
118: .name = "CRLfile",
119: .argname = "file",
120: .desc = "Certificate Revocation List file",
121: .type = OPTION_ARG,
1.16 tb 122: .opt.arg = &cfg.crlfile,
1.8 jsing 123: },
124: {
125: .name = "trusted",
126: .argname = "file",
127: .desc = "Trusted certificates file",
128: .type = OPTION_ARG,
1.16 tb 129: .opt.arg = &cfg.trustfile,
1.8 jsing 130: },
131: {
132: .name = "untrusted",
133: .argname = "file",
134: .desc = "Untrusted certificates file",
135: .type = OPTION_ARG,
1.16 tb 136: .opt.arg = &cfg.untfile,
1.8 jsing 137: },
138: {
139: .name = "verbose",
140: .desc = "Verbose",
141: .type = OPTION_FLAG,
1.16 tb 142: .opt.flag = &cfg.verbose,
1.8 jsing 143: },
144: {
145: .name = NULL,
146: .desc = "",
147: .type = OPTION_ARGV_FUNC,
148: .opt.argvfunc = verify_opt_args,
149: },
150: { NULL },
151: };
152:
153: static const struct option verify_shared_options[] = {
154: {
155: .name = "attime",
156: .argname = "epoch",
157: .desc = "Use epoch as the verification time",
158: },
159: {
160: .name = "check_ss_sig",
161: .desc = "Check the root CA self-signed certificate signature",
162: },
163: {
164: .name = "crl_check",
165: .desc = "Enable CRL checking for the leaf certificate",
166: },
167: {
168: .name = "crl_check_all",
169: .desc = "Enable CRL checking for the entire certificate chain",
170: },
171: {
172: .name = "explicit_policy",
173: .desc = "Require explicit policy (per RFC 3280)",
174: },
175: {
176: .name = "extended_crl",
177: .desc = "Enable extended CRL support",
178: },
179: {
180: .name = "ignore_critical",
181: .desc = "Disable critical extension checking",
182: },
183: {
184: .name = "inhibit_any",
185: .desc = "Inhibit any policy (per RFC 3280)",
186: },
187: {
188: .name = "inhibit_map",
189: .desc = "Inhibit policy mapping (per RFC 3280)",
190: },
191: {
192: .name = "issuer_checks",
193: .desc = "Enable debugging of certificate issuer checks",
1.9 tb 194: },
195: {
196: .name = "legacy_verify",
197: .desc = "Use legacy certificate chain verification",
1.8 jsing 198: },
199: {
200: .name = "policy",
201: .argname = "name",
202: .desc = "Add given policy to the acceptable set",
203: },
204: {
205: .name = "policy_check",
206: .desc = "Enable certificate policy checking",
207: },
208: {
209: .name = "policy_print",
210: .desc = "Print policy",
211: },
212: {
213: .name = "purpose",
214: .argname = "name",
215: .desc = "Verify for the given purpose",
216: },
217: {
218: .name = "use_deltas",
219: .desc = "Use delta CRLS (if present)",
220: },
221: {
222: .name = "verify_depth",
223: .argname = "num",
224: .desc = "Limit verification to the given depth",
225: },
226: {
227: .name = "x509_strict",
228: .desc = "Use strict X.509 rules (disables workarounds)",
229: },
230: { NULL },
231: };
232:
233: static void
234: verify_usage(void)
235: {
236: int i;
237:
238: fprintf(stderr,
239: "usage: verify [-CAfile file] [-CApath directory] [-check_ss_sig]\n"
240: " [-CRLfile file] [-crl_check] [-crl_check_all]\n"
241: " [-explicit_policy] [-extended_crl]\n"
242: " [-ignore_critical] [-inhibit_any] [-inhibit_map]\n"
243: " [-issuer_checks] [-policy_check] [-purpose purpose]\n"
244: " [-trusted file] [-untrusted file] [-verbose]\n"
245: " [-x509_strict] [certificates]\n\n");
246:
247: options_usage(verify_options);
248:
249: fprintf(stderr, "\nVerification options:\n\n");
250: options_usage(verify_shared_options);
251:
252: fprintf(stderr, "\nValid purposes:\n\n");
253: for (i = 0; i < X509_PURPOSE_get_count(); i++) {
254: X509_PURPOSE *ptmp = X509_PURPOSE_get0(i);
255: fprintf(stderr, " %-18s%s\n", X509_PURPOSE_get0_sname(ptmp),
256: X509_PURPOSE_get0_name(ptmp));
257: }
258: }
1.1 jsing 259:
260: int
261: verify_main(int argc, char **argv)
262: {
1.8 jsing 263: STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
264: STACK_OF(X509_CRL) *crls = NULL;
1.1 jsing 265: X509_STORE *cert_ctx = NULL;
266: X509_LOOKUP *lookup = NULL;
1.8 jsing 267: char **cert_files = NULL;
268: int argsused;
1.12 tb 269: int ret = 1;
1.5 doug 270:
1.15 joshua 271: if (pledge("stdio rpath", NULL) == -1) {
272: perror("pledge");
273: exit(1);
1.5 doug 274: }
1.1 jsing 275:
1.16 tb 276: memset(&cfg, 0, sizeof(cfg));
1.8 jsing 277:
278: if (options_parse(argc, argv, verify_options, NULL, &argsused) != 0) {
279: verify_usage();
280: goto end;
281: }
282:
283: if (argsused < argc)
284: cert_files = &argv[argsused];
285:
1.1 jsing 286: cert_ctx = X509_STORE_new();
287: if (cert_ctx == NULL)
288: goto end;
289: X509_STORE_set_verify_cb(cert_ctx, cb);
290:
1.16 tb 291: if (cfg.vpm)
292: X509_STORE_set1_param(cert_ctx, cfg.vpm);
1.1 jsing 293:
294: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
295: if (lookup == NULL)
1.8 jsing 296: abort(); /* XXX */
1.16 tb 297: if (cfg.CAfile) {
298: if (!X509_LOOKUP_load_file(lookup, cfg.CAfile,
1.12 tb 299: X509_FILETYPE_PEM)) {
300: BIO_printf(bio_err, "Error loading file %s\n",
1.16 tb 301: cfg.CAfile);
1.1 jsing 302: ERR_print_errors(bio_err);
303: goto end;
304: }
305: } else
306: X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
307:
308: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
309: if (lookup == NULL)
1.8 jsing 310: abort(); /* XXX */
1.16 tb 311: if (cfg.CApath) {
312: if (!X509_LOOKUP_add_dir(lookup, cfg.CApath,
1.12 tb 313: X509_FILETYPE_PEM)) {
314: BIO_printf(bio_err, "Error loading directory %s\n",
1.16 tb 315: cfg.CApath);
1.1 jsing 316: ERR_print_errors(bio_err);
317: goto end;
318: }
319: } else
320: X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
321:
322: ERR_clear_error();
323:
1.16 tb 324: if (cfg.untfile) {
325: untrusted = load_certs(bio_err, cfg.untfile,
1.13 tb 326: FORMAT_PEM, NULL, "untrusted certificates");
1.1 jsing 327: if (!untrusted)
328: goto end;
329: }
1.16 tb 330: if (cfg.trustfile) {
331: trusted = load_certs(bio_err, cfg.trustfile,
1.13 tb 332: FORMAT_PEM, NULL, "trusted certificates");
1.1 jsing 333: if (!trusted)
334: goto end;
335: }
1.16 tb 336: if (cfg.crlfile) {
337: crls = load_crls(bio_err, cfg.crlfile, FORMAT_PEM,
1.4 bcook 338: NULL, "other CRLs");
1.1 jsing 339: if (!crls)
340: goto end;
341: }
342: ret = 0;
1.8 jsing 343: if (cert_files == NULL) {
1.4 bcook 344: if (1 != check(cert_ctx, NULL, untrusted, trusted, crls))
1.1 jsing 345: ret = -1;
346: } else {
1.8 jsing 347: do {
1.13 tb 348: if (1 != check(cert_ctx, *cert_files++, untrusted,
349: trusted, crls))
1.1 jsing 350: ret = -1;
1.8 jsing 351: } while (*cert_files != NULL);
1.1 jsing 352: }
353:
1.7 jsing 354: end:
1.16 tb 355: if (cfg.vpm)
356: X509_VERIFY_PARAM_free(cfg.vpm);
1.1 jsing 357: if (cert_ctx != NULL)
358: X509_STORE_free(cert_ctx);
359: sk_X509_pop_free(untrusted, X509_free);
360: sk_X509_pop_free(trusted, X509_free);
361: sk_X509_CRL_pop_free(crls, X509_CRL_free);
362:
363: return (ret < 0 ? 2 : ret);
364: }
365:
366: static int
1.10 tb 367: check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain,
368: STACK_OF(X509) *tchain, STACK_OF(X509_CRL) *crls)
1.1 jsing 369: {
370: X509 *x = NULL;
1.10 tb 371: X509_STORE_CTX *csc = NULL;
372: const char *certfile = (file == NULL) ? "stdin" : file;
373: int verify_err;
1.1 jsing 374: int i = 0, ret = 0;
375:
1.4 bcook 376: x = load_cert(bio_err, file, FORMAT_PEM, NULL, "certificate file");
1.1 jsing 377: if (x == NULL)
378: goto end;
379:
1.10 tb 380: if ((csc = X509_STORE_CTX_new()) == NULL)
1.1 jsing 381: goto end;
382: X509_STORE_set_flags(ctx, vflags);
1.10 tb 383: if (!X509_STORE_CTX_init(csc, ctx, x, uchain))
1.1 jsing 384: goto end;
385: if (tchain)
386: X509_STORE_CTX_trusted_stack(csc, tchain);
387: if (crls)
388: X509_STORE_CTX_set0_crls(csc, crls);
1.10 tb 389:
1.1 jsing 390: i = X509_verify_cert(csc);
1.10 tb 391: verify_err = X509_STORE_CTX_get_error(csc);
1.1 jsing 392:
1.10 tb 393: if (i > 0 && verify_err == X509_V_OK) {
1.14 jsing 394: fprintf(stdout, "%s: OK\n", certfile);
1.10 tb 395: ret = 1;
396: } else {
397: fprintf(stdout, "%s: verification failed: %d (%s)\n", certfile,
398: verify_err, X509_verify_cert_error_string(verify_err));
399: }
1.1 jsing 400:
1.7 jsing 401: end:
1.10 tb 402: if (i <= 0)
1.1 jsing 403: ERR_print_errors(bio_err);
1.10 tb 404: X509_free(x);
405: X509_STORE_CTX_free(csc);
1.1 jsing 406:
407: return (ret);
408: }
409:
410: static int
1.11 tb 411: cb(int ok, X509_STORE_CTX *ctx)
1.1 jsing 412: {
413: int cert_error = X509_STORE_CTX_get_error(ctx);
414: X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
415:
416: if (!ok) {
417: if (current_cert) {
418: X509_NAME_print_ex_fp(stdout,
419: X509_get_subject_name(current_cert),
420: 0, XN_FLAG_ONELINE);
421: printf("\n");
422: }
423: printf("%serror %d at %d depth lookup:%s\n",
424: X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
425: cert_error,
426: X509_STORE_CTX_get_error_depth(ctx),
427: X509_verify_cert_error_string(cert_error));
428: switch (cert_error) {
429: case X509_V_ERR_NO_EXPLICIT_POLICY:
430: case X509_V_ERR_CERT_HAS_EXPIRED:
431:
432: /*
433: * since we are just checking the certificates, it is
434: * ok if they are self signed. But we should still
435: * warn the user.
436: */
437:
438: case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
439: /* Continue after extension errors too */
440: case X509_V_ERR_INVALID_CA:
441: case X509_V_ERR_INVALID_NON_CA:
442: case X509_V_ERR_PATH_LENGTH_EXCEEDED:
443: case X509_V_ERR_INVALID_PURPOSE:
444: case X509_V_ERR_CRL_HAS_EXPIRED:
445: case X509_V_ERR_CRL_NOT_YET_VALID:
446: case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
447: ok = 1;
448:
449: }
450:
451: return ok;
452:
453: }
1.16 tb 454: if (!cfg.verbose)
1.1 jsing 455: ERR_clear_error();
456: return (ok);
457: }
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