6a93c018b8ce0d065d605f4f7bfda46bb44f16a6
[openssl.git] / apps / verify.c
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, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose, ENGINE *e);
74 static STACK_OF(X509) *load_untrusted(char *file);
75 static int v_verbose=0, vflags = 0;
76
77 int MAIN(int, char **);
78
79 int MAIN(int argc, char **argv)
80         {
81         ENGINE *e = NULL;
82         int i,ret=1;
83         int purpose = -1;
84         char *CApath=NULL,*CAfile=NULL;
85         char *untfile = NULL, *trustfile = NULL;
86         STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
87         X509_STORE *cert_ctx=NULL;
88         X509_LOOKUP *lookup=NULL;
89 #ifndef OPENSSL_NO_ENGINE
90         char *engine=NULL;
91 #endif
92
93         cert_ctx=X509_STORE_new();
94         if (cert_ctx == NULL) goto end;
95         X509_STORE_set_verify_cb_func(cert_ctx,cb);
96
97         ERR_load_crypto_strings();
98
99         apps_startup();
100
101         if (bio_err == NULL)
102                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
103                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
104
105         if (!load_config(bio_err, NULL))
106                 goto end;
107
108         argc--;
109         argv++;
110         for (;;)
111                 {
112                 if (argc >= 1)
113                         {
114                         if (strcmp(*argv,"-CApath") == 0)
115                                 {
116                                 if (argc-- < 1) goto end;
117                                 CApath= *(++argv);
118                                 }
119                         else if (strcmp(*argv,"-CAfile") == 0)
120                                 {
121                                 if (argc-- < 1) goto end;
122                                 CAfile= *(++argv);
123                                 }
124                         else if (strcmp(*argv,"-purpose") == 0)
125                                 {
126                                 X509_PURPOSE *xptmp;
127                                 if (argc-- < 1) goto end;
128                                 i = X509_PURPOSE_get_by_sname(*(++argv));
129                                 if(i < 0)
130                                         {
131                                         BIO_printf(bio_err, "unrecognized purpose\n");
132                                         goto end;
133                                         }
134                                 xptmp = X509_PURPOSE_get0(i);
135                                 purpose = X509_PURPOSE_get_id(xptmp);
136                                 }
137                         else if (strcmp(*argv,"-untrusted") == 0)
138                                 {
139                                 if (argc-- < 1) goto end;
140                                 untfile= *(++argv);
141                                 }
142                         else if (strcmp(*argv,"-trusted") == 0)
143                                 {
144                                 if (argc-- < 1) goto end;
145                                 trustfile= *(++argv);
146                                 }
147 #ifndef OPENSSL_NO_ENGINE
148                         else if (strcmp(*argv,"-engine") == 0)
149                                 {
150                                 if (--argc < 1) goto end;
151                                 engine= *(++argv);
152                                 }
153 #endif
154                         else if (strcmp(*argv,"-help") == 0)
155                                 goto end;
156                         else if (strcmp(*argv,"-ignore_critical") == 0)
157                                 vflags |= X509_V_FLAG_IGNORE_CRITICAL;
158                         else if (strcmp(*argv,"-issuer_checks") == 0)
159                                 vflags |= X509_V_FLAG_CB_ISSUER_CHECK;
160                         else if (strcmp(*argv,"-crl_check") == 0)
161                                 vflags |= X509_V_FLAG_CRL_CHECK;
162                         else if (strcmp(*argv,"-crl_check_all") == 0)
163                                 vflags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;
164                         else if (strcmp(*argv,"-verbose") == 0)
165                                 v_verbose=1;
166                         else if (argv[0][0] == '-')
167                                 goto end;
168                         else
169                                 break;
170                         argc--;
171                         argv++;
172                         }
173                 else
174                         break;
175                 }
176
177 #ifndef OPENSSL_NO_ENGINE
178         e = setup_engine(bio_err, engine, 0);
179 #endif
180
181         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
182         if (lookup == NULL) abort();
183         if (CAfile) {
184                 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
185                 if(!i) {
186                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
187                         ERR_print_errors(bio_err);
188                         goto end;
189                 }
190         } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
191                 
192         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
193         if (lookup == NULL) abort();
194         if (CApath) {
195                 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
196                 if(!i) {
197                         BIO_printf(bio_err, "Error loading directory %s\n", CApath);
198                         ERR_print_errors(bio_err);
199                         goto end;
200                 }
201         } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
202
203         ERR_clear_error();
204
205         if(untfile) {
206                 if(!(untrusted = load_untrusted(untfile))) {
207                         BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
208                         ERR_print_errors(bio_err);
209                         goto end;
210                 }
211         }
212
213         if(trustfile) {
214                 if(!(trusted = load_untrusted(trustfile))) {
215                         BIO_printf(bio_err, "Error loading untrusted file %s\n", trustfile);
216                         ERR_print_errors(bio_err);
217                         goto end;
218                 }
219         }
220
221         if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, purpose, e);
222         else
223                 for (i=0; i<argc; i++)
224                         check(cert_ctx,argv[i], untrusted, trusted, purpose, e);
225         ret=0;
226 end:
227         if (ret == 1) {
228                 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
229 #ifndef OPENSSL_NO_ENGINE
230                 BIO_printf(bio_err," [-engine e]");
231 #endif
232                 BIO_printf(bio_err," cert1 cert2 ...\n");
233                 BIO_printf(bio_err,"recognized usages:\n");
234                 for(i = 0; i < X509_PURPOSE_get_count(); i++) {
235                         X509_PURPOSE *ptmp;
236                         ptmp = X509_PURPOSE_get0(i);
237                         BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),
238                                                                 X509_PURPOSE_get0_name(ptmp));
239                 }
240         }
241         if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
242         sk_X509_pop_free(untrusted, X509_free);
243         sk_X509_pop_free(trusted, X509_free);
244         apps_shutdown();
245         OPENSSL_EXIT(ret);
246         }
247
248 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose, ENGINE *e)
249         {
250         X509 *x=NULL;
251         int i=0,ret=0;
252         X509_STORE_CTX *csc;
253
254         x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
255         if (x == NULL)
256                 goto end;
257         fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
258
259         csc = X509_STORE_CTX_new();
260         if (csc == NULL)
261                 {
262                 ERR_print_errors(bio_err);
263                 goto end;
264                 }
265         X509_STORE_set_flags(ctx, vflags);
266         if(!X509_STORE_CTX_init(csc,ctx,x,uchain))
267                 {
268                 ERR_print_errors(bio_err);
269                 goto end;
270                 }
271         if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
272         if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose);
273         i=X509_verify_cert(csc);
274         X509_STORE_CTX_free(csc);
275
276         ret=0;
277 end:
278         if (i)
279                 {
280                 fprintf(stdout,"OK\n");
281                 ret=1;
282                 }
283         else
284                 ERR_print_errors(bio_err);
285         if (x != NULL) X509_free(x);
286
287         return(ret);
288         }
289
290 static STACK_OF(X509) *load_untrusted(char *certfile)
291 {
292         STACK_OF(X509_INFO) *sk=NULL;
293         STACK_OF(X509) *stack=NULL, *ret=NULL;
294         BIO *in=NULL;
295         X509_INFO *xi;
296
297         if(!(stack = sk_X509_new_null())) {
298                 BIO_printf(bio_err,"memory allocation failure\n");
299                 goto end;
300         }
301
302         if(!(in=BIO_new_file(certfile, "r"))) {
303                 BIO_printf(bio_err,"error opening the file, %s\n",certfile);
304                 goto end;
305         }
306
307         /* This loads from a file, a stack of x509/crl/pkey sets */
308         if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) {
309                 BIO_printf(bio_err,"error reading the file, %s\n",certfile);
310                 goto end;
311         }
312
313         /* scan over it and pull out the certs */
314         while (sk_X509_INFO_num(sk))
315                 {
316                 xi=sk_X509_INFO_shift(sk);
317                 if (xi->x509 != NULL)
318                         {
319                         sk_X509_push(stack,xi->x509);
320                         xi->x509=NULL;
321                         }
322                 X509_INFO_free(xi);
323                 }
324         if(!sk_X509_num(stack)) {
325                 BIO_printf(bio_err,"no certificates in file, %s\n",certfile);
326                 sk_X509_free(stack);
327                 goto end;
328         }
329         ret=stack;
330 end:
331         BIO_free(in);
332         sk_X509_INFO_free(sk);
333         return(ret);
334         }
335
336 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
337         {
338         char buf[256];
339
340         if (!ok)
341                 {
342                 X509_NAME_oneline(
343                                 X509_get_subject_name(ctx->current_cert),buf,
344                                 sizeof buf);
345                 printf("%s\n",buf);
346                 printf("error %d at %d depth lookup:%s\n",ctx->error,
347                         ctx->error_depth,
348                         X509_verify_cert_error_string(ctx->error));
349                 if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1;
350                 /* since we are just checking the certificates, it is
351                  * ok if they are self signed. But we should still warn
352                  * the user.
353                  */
354                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
355                 /* Continue after extension errors too */
356                 if (ctx->error == X509_V_ERR_INVALID_CA) ok=1;
357                 if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1;
358                 if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1;
359                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
360                 if (ctx->error == X509_V_ERR_CRL_HAS_EXPIRED) ok=1;
361                 if (ctx->error == X509_V_ERR_CRL_NOT_YET_VALID) ok=1;
362                 if (ctx->error == X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION) ok=1;
363                 }
364         if (!v_verbose)
365                 ERR_clear_error();
366         return(ok);
367         }
368