xref: /freebsd/crypto/openssl/apps/verify.c (revision 273c26a3c3bea87a241d6879abd4f991db180bf0)
1 /* apps/verify.c */
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 #include "apps.h"
63 #include <openssl/bio.h>
64 #include <openssl/err.h>
65 #include <openssl/x509.h>
66 #include <openssl/x509v3.h>
67 #include <openssl/pem.h>
68 
69 #undef PROG
70 #define PROG    verify_main
71 
72 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx);
73 static int check(X509_STORE *ctx, char *file,
74                  STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
75                  STACK_OF(X509_CRL) *crls, ENGINE *e);
76 static int v_verbose = 0, vflags = 0;
77 
78 int MAIN(int, char **);
79 
80 int MAIN(int argc, char **argv)
81 {
82     ENGINE *e = NULL;
83     int i, ret = 1, badarg = 0;
84     char *CApath = NULL, *CAfile = NULL;
85     char *untfile = NULL, *trustfile = NULL, *crlfile = NULL;
86     STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
87     STACK_OF(X509_CRL) *crls = NULL;
88     X509_STORE *cert_ctx = NULL;
89     X509_LOOKUP *lookup = NULL;
90     X509_VERIFY_PARAM *vpm = NULL;
91     int crl_download = 0;
92 #ifndef OPENSSL_NO_ENGINE
93     char *engine = NULL;
94 #endif
95 
96     cert_ctx = X509_STORE_new();
97     if (cert_ctx == NULL)
98         goto end;
99     X509_STORE_set_verify_cb(cert_ctx, cb);
100 
101     ERR_load_crypto_strings();
102 
103     apps_startup();
104 
105     if (bio_err == NULL)
106         if ((bio_err = BIO_new(BIO_s_file())) != NULL)
107             BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
108 
109     if (!load_config(bio_err, NULL))
110         goto end;
111 
112     argc--;
113     argv++;
114     for (;;) {
115         if (argc >= 1) {
116             if (strcmp(*argv, "-CApath") == 0) {
117                 if (argc-- < 1)
118                     goto usage;
119                 CApath = *(++argv);
120             } else if (strcmp(*argv, "-CAfile") == 0) {
121                 if (argc-- < 1)
122                     goto usage;
123                 CAfile = *(++argv);
124             } else if (args_verify(&argv, &argc, &badarg, bio_err, &vpm)) {
125                 if (badarg)
126                     goto usage;
127                 continue;
128             } else if (strcmp(*argv, "-untrusted") == 0) {
129                 if (argc-- < 1)
130                     goto usage;
131                 untfile = *(++argv);
132             } else if (strcmp(*argv, "-trusted") == 0) {
133                 if (argc-- < 1)
134                     goto usage;
135                 trustfile = *(++argv);
136             } else if (strcmp(*argv, "-CRLfile") == 0) {
137                 if (argc-- < 1)
138                     goto usage;
139                 crlfile = *(++argv);
140             } else if (strcmp(*argv, "-crl_download") == 0)
141                 crl_download = 1;
142 #ifndef OPENSSL_NO_ENGINE
143             else if (strcmp(*argv, "-engine") == 0) {
144                 if (--argc < 1)
145                     goto usage;
146                 engine = *(++argv);
147             }
148 #endif
149             else if (strcmp(*argv, "-help") == 0)
150                 goto usage;
151             else if (strcmp(*argv, "-verbose") == 0)
152                 v_verbose = 1;
153             else if (argv[0][0] == '-')
154                 goto usage;
155             else
156                 break;
157             argc--;
158             argv++;
159         } else
160             break;
161     }
162 
163 #ifndef OPENSSL_NO_ENGINE
164     e = setup_engine(bio_err, engine, 0);
165 #endif
166 
167     if (vpm)
168         X509_STORE_set1_param(cert_ctx, vpm);
169 
170     lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
171     if (lookup == NULL)
172         abort();
173     if (CAfile) {
174         i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
175         if (!i) {
176             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
177             ERR_print_errors(bio_err);
178             goto end;
179         }
180     } else
181         X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
182 
183     lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
184     if (lookup == NULL)
185         abort();
186     if (CApath) {
187         i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
188         if (!i) {
189             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
190             ERR_print_errors(bio_err);
191             goto end;
192         }
193     } else
194         X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
195 
196     ERR_clear_error();
197 
198     if (untfile) {
199         untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
200                                NULL, e, "untrusted certificates");
201         if (!untrusted)
202             goto end;
203     }
204 
205     if (trustfile) {
206         trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
207                              NULL, e, "trusted certificates");
208         if (!trusted)
209             goto end;
210     }
211 
212     if (crlfile) {
213         crls = load_crls(bio_err, crlfile, FORMAT_PEM, NULL, e, "other CRLs");
214         if (!crls)
215             goto end;
216     }
217 
218     ret = 0;
219 
220     if (crl_download)
221         store_setup_crl_download(cert_ctx);
222     if (argc < 1) {
223         if (1 != check(cert_ctx, NULL, untrusted, trusted, crls, e))
224             ret = -1;
225     } else {
226         for (i = 0; i < argc; i++)
227             if (1 != check(cert_ctx, argv[i], untrusted, trusted, crls, e))
228                 ret = -1;
229     }
230 
231  usage:
232     if (ret == 1) {
233         BIO_printf(bio_err,
234                    "usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
235         BIO_printf(bio_err, " [-no_alt_chains] [-attime timestamp]");
236 #ifndef OPENSSL_NO_ENGINE
237         BIO_printf(bio_err, " [-engine e]");
238 #endif
239         BIO_printf(bio_err, " cert1 cert2 ...\n");
240 
241         BIO_printf(bio_err, "recognized usages:\n");
242         for (i = 0; i < X509_PURPOSE_get_count(); i++) {
243             X509_PURPOSE *ptmp;
244             ptmp = X509_PURPOSE_get0(i);
245             BIO_printf(bio_err, "\t%-10s\t%s\n",
246                        X509_PURPOSE_get0_sname(ptmp),
247                        X509_PURPOSE_get0_name(ptmp));
248         }
249     }
250  end:
251     if (vpm)
252         X509_VERIFY_PARAM_free(vpm);
253     if (cert_ctx != NULL)
254         X509_STORE_free(cert_ctx);
255     sk_X509_pop_free(untrusted, X509_free);
256     sk_X509_pop_free(trusted, X509_free);
257     sk_X509_CRL_pop_free(crls, X509_CRL_free);
258     apps_shutdown();
259     OPENSSL_EXIT(ret < 0 ? 2 : ret);
260 }
261 
262 static int check(X509_STORE *ctx, char *file,
263                  STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
264                  STACK_OF(X509_CRL) *crls, ENGINE *e)
265 {
266     X509 *x = NULL;
267     int i = 0, ret = 0;
268     X509_STORE_CTX *csc;
269 
270     x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
271     if (x == NULL)
272         goto end;
273     fprintf(stdout, "%s: ", (file == NULL) ? "stdin" : file);
274 
275     csc = X509_STORE_CTX_new();
276     if (csc == NULL) {
277         ERR_print_errors(bio_err);
278         goto end;
279     }
280     X509_STORE_set_flags(ctx, vflags);
281     if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
282         ERR_print_errors(bio_err);
283         goto end;
284     }
285     if (tchain)
286         X509_STORE_CTX_trusted_stack(csc, tchain);
287     if (crls)
288         X509_STORE_CTX_set0_crls(csc, crls);
289     i = X509_verify_cert(csc);
290     X509_STORE_CTX_free(csc);
291 
292     ret = 0;
293  end:
294     if (i > 0) {
295         fprintf(stdout, "OK\n");
296         ret = 1;
297     } else
298         ERR_print_errors(bio_err);
299     if (x != NULL)
300         X509_free(x);
301 
302     return (ret);
303 }
304 
305 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
306 {
307     int cert_error = X509_STORE_CTX_get_error(ctx);
308     X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
309 
310     if (!ok) {
311         if (current_cert) {
312             X509_NAME_print_ex_fp(stdout,
313                                   X509_get_subject_name(current_cert),
314                                   0, XN_FLAG_ONELINE);
315             printf("\n");
316         }
317         printf("%serror %d at %d depth lookup:%s\n",
318                X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
319                cert_error,
320                X509_STORE_CTX_get_error_depth(ctx),
321                X509_verify_cert_error_string(cert_error));
322         switch (cert_error) {
323         case X509_V_ERR_NO_EXPLICIT_POLICY:
324             policies_print(NULL, ctx);
325         case X509_V_ERR_CERT_HAS_EXPIRED:
326 
327             /*
328              * since we are just checking the certificates, it is ok if they
329              * are self signed. But we should still warn the user.
330              */
331 
332         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
333             /* Continue after extension errors too */
334         case X509_V_ERR_INVALID_CA:
335         case X509_V_ERR_INVALID_NON_CA:
336         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
337         case X509_V_ERR_INVALID_PURPOSE:
338         case X509_V_ERR_CRL_HAS_EXPIRED:
339         case X509_V_ERR_CRL_NOT_YET_VALID:
340         case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
341             ok = 1;
342 
343         }
344 
345         return ok;
346 
347     }
348     if (cert_error == X509_V_OK && ok == 2)
349         policies_print(NULL, ctx);
350     if (!v_verbose)
351         ERR_clear_error();
352     return (ok);
353 }
354