Annotation of src/usr.bin/openssl/verify.c, Revision 1.2
1.2 ! jsing 1: /* $OpenBSD: verify.c,v 1.1 2014/08/26 17:47:25 jsing 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:
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, ENGINE * e);
74: static int v_verbose = 0, vflags = 0;
75:
76: int verify_main(int, char **);
77:
78: int
79: verify_main(int argc, char **argv)
80: {
81: ENGINE *e = NULL;
82: int i, ret = 1, badarg = 0;
83: char *CApath = NULL, *CAfile = NULL;
84: char *untfile = NULL, *trustfile = NULL, *crlfile = NULL;
85: STACK_OF(X509) * untrusted = NULL, *trusted = NULL;
86: STACK_OF(X509_CRL) * crls = NULL;
87: X509_STORE *cert_ctx = NULL;
88: X509_LOOKUP *lookup = NULL;
89: X509_VERIFY_PARAM *vpm = NULL;
90: #ifndef OPENSSL_NO_ENGINE
91: char *engine = NULL;
92: #endif
93:
94: cert_ctx = X509_STORE_new();
95: if (cert_ctx == NULL)
96: goto end;
97: X509_STORE_set_verify_cb(cert_ctx, cb);
98:
99: argc--;
100: argv++;
101: for (;;) {
102: if (argc >= 1) {
103: if (strcmp(*argv, "-CApath") == 0) {
104: if (argc-- < 1)
105: goto end;
106: CApath = *(++argv);
107: } else if (strcmp(*argv, "-CAfile") == 0) {
108: if (argc-- < 1)
109: goto end;
110: CAfile = *(++argv);
111: } else if (args_verify(&argv, &argc, &badarg, bio_err,
112: &vpm)) {
113: if (badarg)
114: goto end;
115: continue;
116: } else if (strcmp(*argv, "-untrusted") == 0) {
117: if (argc-- < 1)
118: goto end;
119: untfile = *(++argv);
120: } else if (strcmp(*argv, "-trusted") == 0) {
121: if (argc-- < 1)
122: goto end;
123: trustfile = *(++argv);
124: } else if (strcmp(*argv, "-CRLfile") == 0) {
125: if (argc-- < 1)
126: goto end;
127: crlfile = *(++argv);
128: }
129: #ifndef OPENSSL_NO_ENGINE
130: else if (strcmp(*argv, "-engine") == 0) {
131: if (--argc < 1)
132: goto end;
133: engine = *(++argv);
134: }
135: #endif
136: else if (strcmp(*argv, "-help") == 0)
137: goto end;
138: else if (strcmp(*argv, "-verbose") == 0)
139: v_verbose = 1;
140: else if (argv[0][0] == '-')
141: goto end;
142: else
143: break;
144: argc--;
145: argv++;
146: } else
147: break;
148: }
149:
150: #ifndef OPENSSL_NO_ENGINE
151: e = setup_engine(bio_err, engine, 0);
152: #endif
153:
154: if (vpm)
155: X509_STORE_set1_param(cert_ctx, vpm);
156:
157: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
158: if (lookup == NULL)
159: abort();
160: if (CAfile) {
161: i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
162: if (!i) {
163: BIO_printf(bio_err, "Error loading file %s\n", CAfile);
164: ERR_print_errors(bio_err);
165: goto end;
166: }
167: } else
168: X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
169:
170: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
171: if (lookup == NULL)
172: abort();
173: if (CApath) {
174: i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
175: if (!i) {
176: BIO_printf(bio_err, "Error loading directory %s\n", CApath);
177: ERR_print_errors(bio_err);
178: goto end;
179: }
180: } else
181: X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
182:
183: ERR_clear_error();
184:
185: if (untfile) {
186: untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
187: NULL, e, "untrusted certificates");
188: if (!untrusted)
189: goto end;
190: }
191: if (trustfile) {
192: trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
193: NULL, e, "trusted certificates");
194: if (!trusted)
195: goto end;
196: }
197: if (crlfile) {
198: crls = load_crls(bio_err, crlfile, FORMAT_PEM,
199: NULL, e, "other CRLs");
200: if (!crls)
201: goto end;
202: }
203: ret = 0;
204: if (argc < 1) {
205: if (1 != check(cert_ctx, NULL, untrusted, trusted, crls, e))
206: ret = -1;
207: } else {
208: for (i = 0; i < argc; i++)
209: if (1 != check(cert_ctx, argv[i], untrusted, trusted,
210: crls, e))
211: ret = -1;
212: }
213:
214: end:
215: if (ret == 1) {
216: BIO_printf(bio_err, "usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
217: BIO_printf(bio_err, " [-attime timestamp]");
218: #ifndef OPENSSL_NO_ENGINE
219: BIO_printf(bio_err, " [-engine e]");
220: #endif
221: BIO_printf(bio_err, " cert1 cert2 ...\n");
222:
223: BIO_printf(bio_err, "recognized usages:\n");
224: for (i = 0; i < X509_PURPOSE_get_count(); i++) {
225: X509_PURPOSE *ptmp;
226: ptmp = X509_PURPOSE_get0(i);
227: BIO_printf(bio_err, "\t%-10s\t%s\n",
228: X509_PURPOSE_get0_sname(ptmp),
229: X509_PURPOSE_get0_name(ptmp));
230: }
231: }
232: if (vpm)
233: X509_VERIFY_PARAM_free(vpm);
234: if (cert_ctx != NULL)
235: X509_STORE_free(cert_ctx);
236: sk_X509_pop_free(untrusted, X509_free);
237: sk_X509_pop_free(trusted, X509_free);
238: sk_X509_CRL_pop_free(crls, X509_CRL_free);
239:
240: return (ret < 0 ? 2 : ret);
241: }
242:
243: static int
244: check(X509_STORE * ctx, char *file, STACK_OF(X509) * uchain,
245: STACK_OF(X509) * tchain, STACK_OF(X509_CRL) * crls, ENGINE * e)
246: {
247: X509 *x = NULL;
248: int i = 0, ret = 0;
249: X509_STORE_CTX *csc;
250:
251: x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
252: if (x == NULL)
253: goto end;
254: fprintf(stdout, "%s: ", (file == NULL) ? "stdin" : file);
255:
256: csc = X509_STORE_CTX_new();
257: if (csc == NULL) {
258: ERR_print_errors(bio_err);
259: goto end;
260: }
261: X509_STORE_set_flags(ctx, vflags);
262: if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
263: ERR_print_errors(bio_err);
264: goto end;
265: }
266: if (tchain)
267: X509_STORE_CTX_trusted_stack(csc, tchain);
268: if (crls)
269: X509_STORE_CTX_set0_crls(csc, crls);
270: i = X509_verify_cert(csc);
271: X509_STORE_CTX_free(csc);
272:
273: ret = 0;
274:
275: end:
276: if (i > 0) {
277: fprintf(stdout, "OK\n");
278: ret = 1;
279: } else
280: ERR_print_errors(bio_err);
281: if (x != NULL)
282: X509_free(x);
283:
284: return (ret);
285: }
286:
287: static int
288: cb(int ok, X509_STORE_CTX * ctx)
289: {
290: int cert_error = X509_STORE_CTX_get_error(ctx);
291: X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
292:
293: if (!ok) {
294: if (current_cert) {
295: X509_NAME_print_ex_fp(stdout,
296: X509_get_subject_name(current_cert),
297: 0, XN_FLAG_ONELINE);
298: printf("\n");
299: }
300: printf("%serror %d at %d depth lookup:%s\n",
301: X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
302: cert_error,
303: X509_STORE_CTX_get_error_depth(ctx),
304: X509_verify_cert_error_string(cert_error));
305: switch (cert_error) {
306: case X509_V_ERR_NO_EXPLICIT_POLICY:
307: policies_print(NULL, ctx);
308: case X509_V_ERR_CERT_HAS_EXPIRED:
309:
310: /*
311: * since we are just checking the certificates, it is
312: * ok if they are self signed. But we should still
313: * warn the user.
314: */
315:
316: case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
317: /* Continue after extension errors too */
318: case X509_V_ERR_INVALID_CA:
319: case X509_V_ERR_INVALID_NON_CA:
320: case X509_V_ERR_PATH_LENGTH_EXCEEDED:
321: case X509_V_ERR_INVALID_PURPOSE:
322: case X509_V_ERR_CRL_HAS_EXPIRED:
323: case X509_V_ERR_CRL_NOT_YET_VALID:
324: case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
325: ok = 1;
326:
327: }
328:
329: return ok;
330:
331: }
332: if (cert_error == X509_V_OK && ok == 2)
333: policies_print(NULL, ctx);
334: if (!v_verbose)
335: ERR_clear_error();
336: return (ok);
337: }
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