Annotation of src/usr.bin/openssl/verify.c, Revision 1.3
1.3 ! jsing 1: /* $OpenBSD: verify.c,v 1.2 2014/08/28 14:23:52 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
77: verify_main(int argc, char **argv)
78: {
79: ENGINE *e = NULL;
80: int i, ret = 1, badarg = 0;
81: char *CApath = NULL, *CAfile = NULL;
82: char *untfile = NULL, *trustfile = NULL, *crlfile = NULL;
83: STACK_OF(X509) * untrusted = NULL, *trusted = NULL;
84: STACK_OF(X509_CRL) * crls = NULL;
85: X509_STORE *cert_ctx = NULL;
86: X509_LOOKUP *lookup = NULL;
87: X509_VERIFY_PARAM *vpm = NULL;
88: #ifndef OPENSSL_NO_ENGINE
89: char *engine = NULL;
90: #endif
91:
92: cert_ctx = X509_STORE_new();
93: if (cert_ctx == NULL)
94: goto end;
95: X509_STORE_set_verify_cb(cert_ctx, cb);
96:
97: argc--;
98: argv++;
99: for (;;) {
100: if (argc >= 1) {
101: if (strcmp(*argv, "-CApath") == 0) {
102: if (argc-- < 1)
103: goto end;
104: CApath = *(++argv);
105: } else if (strcmp(*argv, "-CAfile") == 0) {
106: if (argc-- < 1)
107: goto end;
108: CAfile = *(++argv);
109: } else if (args_verify(&argv, &argc, &badarg, bio_err,
110: &vpm)) {
111: if (badarg)
112: goto end;
113: continue;
114: } else if (strcmp(*argv, "-untrusted") == 0) {
115: if (argc-- < 1)
116: goto end;
117: untfile = *(++argv);
118: } else if (strcmp(*argv, "-trusted") == 0) {
119: if (argc-- < 1)
120: goto end;
121: trustfile = *(++argv);
122: } else if (strcmp(*argv, "-CRLfile") == 0) {
123: if (argc-- < 1)
124: goto end;
125: crlfile = *(++argv);
126: }
127: #ifndef OPENSSL_NO_ENGINE
128: else if (strcmp(*argv, "-engine") == 0) {
129: if (--argc < 1)
130: goto end;
131: engine = *(++argv);
132: }
133: #endif
134: else if (strcmp(*argv, "-help") == 0)
135: goto end;
136: else if (strcmp(*argv, "-verbose") == 0)
137: v_verbose = 1;
138: else if (argv[0][0] == '-')
139: goto end;
140: else
141: break;
142: argc--;
143: argv++;
144: } else
145: break;
146: }
147:
148: #ifndef OPENSSL_NO_ENGINE
149: e = setup_engine(bio_err, engine, 0);
150: #endif
151:
152: if (vpm)
153: X509_STORE_set1_param(cert_ctx, vpm);
154:
155: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
156: if (lookup == NULL)
157: abort();
158: if (CAfile) {
159: i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
160: if (!i) {
161: BIO_printf(bio_err, "Error loading file %s\n", CAfile);
162: ERR_print_errors(bio_err);
163: goto end;
164: }
165: } else
166: X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
167:
168: lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
169: if (lookup == NULL)
170: abort();
171: if (CApath) {
172: i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
173: if (!i) {
174: BIO_printf(bio_err, "Error loading directory %s\n", CApath);
175: ERR_print_errors(bio_err);
176: goto end;
177: }
178: } else
179: X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
180:
181: ERR_clear_error();
182:
183: if (untfile) {
184: untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
185: NULL, e, "untrusted certificates");
186: if (!untrusted)
187: goto end;
188: }
189: if (trustfile) {
190: trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
191: NULL, e, "trusted certificates");
192: if (!trusted)
193: goto end;
194: }
195: if (crlfile) {
196: crls = load_crls(bio_err, crlfile, FORMAT_PEM,
197: NULL, e, "other CRLs");
198: if (!crls)
199: goto end;
200: }
201: ret = 0;
202: if (argc < 1) {
203: if (1 != check(cert_ctx, NULL, untrusted, trusted, crls, e))
204: ret = -1;
205: } else {
206: for (i = 0; i < argc; i++)
207: if (1 != check(cert_ctx, argv[i], untrusted, trusted,
208: crls, e))
209: ret = -1;
210: }
211:
212: end:
213: if (ret == 1) {
214: BIO_printf(bio_err, "usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
215: BIO_printf(bio_err, " [-attime timestamp]");
216: #ifndef OPENSSL_NO_ENGINE
217: BIO_printf(bio_err, " [-engine e]");
218: #endif
219: BIO_printf(bio_err, " cert1 cert2 ...\n");
220:
221: BIO_printf(bio_err, "recognized usages:\n");
222: for (i = 0; i < X509_PURPOSE_get_count(); i++) {
223: X509_PURPOSE *ptmp;
224: ptmp = X509_PURPOSE_get0(i);
225: BIO_printf(bio_err, "\t%-10s\t%s\n",
226: X509_PURPOSE_get0_sname(ptmp),
227: X509_PURPOSE_get0_name(ptmp));
228: }
229: }
230: if (vpm)
231: X509_VERIFY_PARAM_free(vpm);
232: if (cert_ctx != NULL)
233: X509_STORE_free(cert_ctx);
234: sk_X509_pop_free(untrusted, X509_free);
235: sk_X509_pop_free(trusted, X509_free);
236: sk_X509_CRL_pop_free(crls, X509_CRL_free);
237:
238: return (ret < 0 ? 2 : ret);
239: }
240:
241: static int
242: check(X509_STORE * ctx, char *file, STACK_OF(X509) * uchain,
243: STACK_OF(X509) * tchain, STACK_OF(X509_CRL) * crls, ENGINE * e)
244: {
245: X509 *x = NULL;
246: int i = 0, ret = 0;
247: X509_STORE_CTX *csc;
248:
249: x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
250: if (x == NULL)
251: goto end;
252: fprintf(stdout, "%s: ", (file == NULL) ? "stdin" : file);
253:
254: csc = X509_STORE_CTX_new();
255: if (csc == NULL) {
256: ERR_print_errors(bio_err);
257: goto end;
258: }
259: X509_STORE_set_flags(ctx, vflags);
260: if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
261: ERR_print_errors(bio_err);
262: goto end;
263: }
264: if (tchain)
265: X509_STORE_CTX_trusted_stack(csc, tchain);
266: if (crls)
267: X509_STORE_CTX_set0_crls(csc, crls);
268: i = X509_verify_cert(csc);
269: X509_STORE_CTX_free(csc);
270:
271: ret = 0;
272:
273: end:
274: if (i > 0) {
275: fprintf(stdout, "OK\n");
276: ret = 1;
277: } else
278: ERR_print_errors(bio_err);
279: if (x != NULL)
280: X509_free(x);
281:
282: return (ret);
283: }
284:
285: static int
286: cb(int ok, X509_STORE_CTX * ctx)
287: {
288: int cert_error = X509_STORE_CTX_get_error(ctx);
289: X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
290:
291: if (!ok) {
292: if (current_cert) {
293: X509_NAME_print_ex_fp(stdout,
294: X509_get_subject_name(current_cert),
295: 0, XN_FLAG_ONELINE);
296: printf("\n");
297: }
298: printf("%serror %d at %d depth lookup:%s\n",
299: X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
300: cert_error,
301: X509_STORE_CTX_get_error_depth(ctx),
302: X509_verify_cert_error_string(cert_error));
303: switch (cert_error) {
304: case X509_V_ERR_NO_EXPLICIT_POLICY:
305: policies_print(NULL, ctx);
306: case X509_V_ERR_CERT_HAS_EXPIRED:
307:
308: /*
309: * since we are just checking the certificates, it is
310: * ok if they are self signed. But we should still
311: * warn the user.
312: */
313:
314: case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
315: /* Continue after extension errors too */
316: case X509_V_ERR_INVALID_CA:
317: case X509_V_ERR_INVALID_NON_CA:
318: case X509_V_ERR_PATH_LENGTH_EXCEEDED:
319: case X509_V_ERR_INVALID_PURPOSE:
320: case X509_V_ERR_CRL_HAS_EXPIRED:
321: case X509_V_ERR_CRL_NOT_YET_VALID:
322: case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
323: ok = 1;
324:
325: }
326:
327: return ok;
328:
329: }
330: if (cert_error == X509_V_OK && ok == 2)
331: policies_print(NULL, ctx);
332: if (!v_verbose)
333: ERR_clear_error();
334: return (ok);
335: }