On VMS, stdout may very well lead to a file that is written to in a
[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);
74 static STACK_OF(X509) *load_untrusted(char *file);
75 static int v_verbose=0, issuer_checks = 0;
76
77 int MAIN(int, char **);
78
79 int MAIN(int argc, char **argv)
80         {
81         int i,ret=1;
82         int purpose = -1;
83         char *CApath=NULL,*CAfile=NULL;
84         char *untfile = NULL, *trustfile = NULL;
85         STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
86         X509_STORE *cert_ctx=NULL;
87         X509_LOOKUP *lookup=NULL;
88
89         cert_ctx=X509_STORE_new();
90         if (cert_ctx == NULL) goto end;
91         X509_STORE_set_verify_cb_func(cert_ctx,cb);
92
93         ERR_load_crypto_strings();
94
95         apps_startup();
96
97         if (bio_err == NULL)
98                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
99                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
100
101         argc--;
102         argv++;
103         for (;;)
104                 {
105                 if (argc >= 1)
106                         {
107                         if (strcmp(*argv,"-CApath") == 0)
108                                 {
109                                 if (argc-- < 1) goto end;
110                                 CApath= *(++argv);
111                                 }
112                         else if (strcmp(*argv,"-CAfile") == 0)
113                                 {
114                                 if (argc-- < 1) goto end;
115                                 CAfile= *(++argv);
116                                 }
117                         else if (strcmp(*argv,"-purpose") == 0)
118                                 {
119                                 X509_PURPOSE *xptmp;
120                                 if (argc-- < 1) goto end;
121                                 i = X509_PURPOSE_get_by_sname(*(++argv));
122                                 if(i < 0)
123                                         {
124                                         BIO_printf(bio_err, "unrecognized purpose\n");
125                                         goto end;
126                                         }
127                                 xptmp = X509_PURPOSE_get0(i);
128                                 purpose = X509_PURPOSE_get_id(xptmp);
129                                 }
130                         else if (strcmp(*argv,"-untrusted") == 0)
131                                 {
132                                 if (argc-- < 1) goto end;
133                                 untfile= *(++argv);
134                                 }
135                         else if (strcmp(*argv,"-trusted") == 0)
136                                 {
137                                 if (argc-- < 1) goto end;
138                                 trustfile= *(++argv);
139                                 }
140                         else if (strcmp(*argv,"-help") == 0)
141                                 goto end;
142                         else if (strcmp(*argv,"-issuer_checks") == 0)
143                                 issuer_checks=1;
144                         else if (strcmp(*argv,"-verbose") == 0)
145                                 v_verbose=1;
146                         else if (argv[0][0] == '-')
147                                 goto end;
148                         else
149                                 break;
150                         argc--;
151                         argv++;
152                         }
153                 else
154                         break;
155                 }
156
157         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
158         if (lookup == NULL) abort();
159         if (CAfile) {
160                 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
161                 if(!i) {
162                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
163                         ERR_print_errors(bio_err);
164                         goto end;
165                 }
166         } else 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) abort();
170         if (CApath) {
171                 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
172                 if(!i) {
173                         BIO_printf(bio_err, "Error loading directory %s\n", CApath);
174                         ERR_print_errors(bio_err);
175                         goto end;
176                 }
177         } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
178
179         ERR_clear_error();
180
181         if(untfile) {
182                 if(!(untrusted = load_untrusted(untfile))) {
183                         BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
184                         ERR_print_errors(bio_err);
185                         goto end;
186                 }
187         }
188
189         if(trustfile) {
190                 if(!(trusted = load_untrusted(trustfile))) {
191                         BIO_printf(bio_err, "Error loading untrusted file %s\n", trustfile);
192                         ERR_print_errors(bio_err);
193                         goto end;
194                 }
195         }
196
197         if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, purpose);
198         else
199                 for (i=0; i<argc; i++)
200                         check(cert_ctx,argv[i], untrusted, trusted, purpose);
201         ret=0;
202 end:
203         if (ret == 1) {
204                 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] cert1 cert2 ...\n");
205                 BIO_printf(bio_err,"recognized usages:\n");
206                 for(i = 0; i < X509_PURPOSE_get_count(); i++) {
207                         X509_PURPOSE *ptmp;
208                         ptmp = X509_PURPOSE_get0(i);
209                         BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),
210                                                                 X509_PURPOSE_get0_name(ptmp));
211                 }
212         }
213         if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
214         sk_X509_pop_free(untrusted, X509_free);
215         sk_X509_pop_free(trusted, X509_free);
216         EXIT(ret);
217         }
218
219 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose)
220         {
221         X509 *x=NULL;
222         BIO *in=NULL;
223         int i=0,ret=0;
224         X509_STORE_CTX *csc;
225
226         in=BIO_new(BIO_s_file());
227         if (in == NULL)
228                 {
229                 ERR_print_errors(bio_err);
230                 goto end;
231                 }
232
233         if (file == NULL)
234                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
235         else
236                 {
237                 if (BIO_read_filename(in,file) <= 0)
238                         {
239                         perror(file);
240                         goto end;
241                         }
242                 }
243
244         x=PEM_read_bio_X509(in,NULL,NULL,NULL);
245         if (x == NULL)
246                 {
247                 fprintf(stdout,"%s: unable to load certificate file\n",
248                         (file == NULL)?"stdin":file);
249                 ERR_print_errors(bio_err);
250                 goto end;
251                 }
252         fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
253
254         csc = X509_STORE_CTX_new();
255         if (csc == NULL)
256                 {
257                 ERR_print_errors(bio_err);
258                 goto end;
259                 }
260         X509_STORE_CTX_init(csc,ctx,x,uchain);
261         if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
262         if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose);
263         if(issuer_checks)
264                 X509_STORE_CTX_set_flags(csc, X509_V_FLAG_CB_ISSUER_CHECK);
265         i=X509_verify_cert(csc);
266         X509_STORE_CTX_free(csc);
267
268         ret=0;
269 end:
270         if (i)
271                 {
272                 fprintf(stdout,"OK\n");
273                 ret=1;
274                 }
275         else
276                 ERR_print_errors(bio_err);
277         if (x != NULL) X509_free(x);
278         if (in != NULL) BIO_free(in);
279
280         return(ret);
281         }
282
283 static STACK_OF(X509) *load_untrusted(char *certfile)
284 {
285         STACK_OF(X509_INFO) *sk=NULL;
286         STACK_OF(X509) *stack=NULL, *ret=NULL;
287         BIO *in=NULL;
288         X509_INFO *xi;
289
290         if(!(stack = sk_X509_new_null())) {
291                 BIO_printf(bio_err,"memory allocation failure\n");
292                 goto end;
293         }
294
295         if(!(in=BIO_new_file(certfile, "r"))) {
296                 BIO_printf(bio_err,"error opening the file, %s\n",certfile);
297                 goto end;
298         }
299
300         /* This loads from a file, a stack of x509/crl/pkey sets */
301         if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) {
302                 BIO_printf(bio_err,"error reading the file, %s\n",certfile);
303                 goto end;
304         }
305
306         /* scan over it and pull out the certs */
307         while (sk_X509_INFO_num(sk))
308                 {
309                 xi=sk_X509_INFO_shift(sk);
310                 if (xi->x509 != NULL)
311                         {
312                         sk_X509_push(stack,xi->x509);
313                         xi->x509=NULL;
314                         }
315                 X509_INFO_free(xi);
316                 }
317         if(!sk_X509_num(stack)) {
318                 BIO_printf(bio_err,"no certificates in file, %s\n",certfile);
319                 sk_X509_free(stack);
320                 goto end;
321         }
322         ret=stack;
323 end:
324         BIO_free(in);
325         sk_X509_INFO_free(sk);
326         return(ret);
327         }
328
329 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
330         {
331         char buf[256];
332
333         if (!ok)
334                 {
335                 X509_NAME_oneline(
336                                 X509_get_subject_name(ctx->current_cert),buf,256);
337                 printf("%s\n",buf);
338                 printf("error %d at %d depth lookup:%s\n",ctx->error,
339                         ctx->error_depth,
340                         X509_verify_cert_error_string(ctx->error));
341                 if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1;
342                 /* since we are just checking the certificates, it is
343                  * ok if they are self signed. But we should still warn
344                  * the user.
345                  */
346                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
347                 /* Continue after extension errors too */
348                 if (ctx->error == X509_V_ERR_INVALID_CA) ok=1;
349                 if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1;
350                 if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1;
351                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
352                 }
353         if (!v_verbose)
354                 ERR_clear_error();
355         return(ok);
356         }
357