apps: constify some string parameters
[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,
74                 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
75                 STACK_OF(X509_CRL) *crls, ENGINE *e, int show_chain);
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, show_chain = 0;
92 #ifndef OPENSSL_NO_ENGINE
93         char *engine=NULL;
94 #endif
95
96         cert_ctx=X509_STORE_new();
97         if (cert_ctx == NULL) goto end;
98         X509_STORE_set_verify_cb(cert_ctx,cb);
99
100         ERR_load_crypto_strings();
101
102         apps_startup();
103
104         if (bio_err == NULL)
105                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
106                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
107
108         if (!load_config(bio_err, NULL))
109                 goto end;
110
111         argc--;
112         argv++;
113         for (;;)
114                 {
115                 if (argc >= 1)
116                         {
117                         if (strcmp(*argv,"-CApath") == 0)
118                                 {
119                                 if (argc-- < 1) goto end;
120                                 CApath= *(++argv);
121                                 }
122                         else if (strcmp(*argv,"-CAfile") == 0)
123                                 {
124                                 if (argc-- < 1) goto end;
125                                 CAfile= *(++argv);
126                                 }
127                         else if (args_verify(&argv, &argc, &badarg, bio_err,
128                                                                         &vpm))
129                                 {
130                                 if (badarg)
131                                         goto end;
132                                 continue;
133                                 }
134                         else if (strcmp(*argv,"-untrusted") == 0)
135                                 {
136                                 if (argc-- < 1) goto end;
137                                 untfile= *(++argv);
138                                 }
139                         else if (strcmp(*argv,"-trusted") == 0)
140                                 {
141                                 if (argc-- < 1) goto end;
142                                 trustfile= *(++argv);
143                                 }
144                         else if (strcmp(*argv,"-CRLfile") == 0)
145                                 {
146                                 if (argc-- < 1) goto end;
147                                 crlfile= *(++argv);
148                                 }
149                         else if (strcmp(*argv,"-crl_download") == 0)
150                                 crl_download = 1;
151                         else if (strcmp(*argv,"-show_chain") == 0)
152                                 show_chain = 1;
153 #ifndef OPENSSL_NO_ENGINE
154                         else if (strcmp(*argv,"-engine") == 0)
155                                 {
156                                 if (--argc < 1) goto end;
157                                 engine= *(++argv);
158                                 }
159 #endif
160                         else if (strcmp(*argv,"-help") == 0)
161                                 goto end;
162                         else if (strcmp(*argv,"-verbose") == 0)
163                                 v_verbose=1;
164                         else if (argv[0][0] == '-')
165                                 goto end;
166                         else
167                                 break;
168                         argc--;
169                         argv++;
170                         }
171                 else
172                         break;
173                 }
174
175 #ifndef OPENSSL_NO_ENGINE
176         e = setup_engine(bio_err, engine, 0);
177 #endif
178
179         if (vpm)
180                 X509_STORE_set1_param(cert_ctx, vpm);
181
182         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
183         if (lookup == NULL) abort();
184         if (CAfile) {
185                 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
186                 if(!i) {
187                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
188                         ERR_print_errors(bio_err);
189                         goto end;
190                 }
191         } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
192                 
193         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
194         if (lookup == NULL) abort();
195         if (CApath) {
196                 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
197                 if(!i) {
198                         BIO_printf(bio_err, "Error loading directory %s\n", CApath);
199                         ERR_print_errors(bio_err);
200                         goto end;
201                 }
202         } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
203
204         ERR_clear_error();
205
206         if(untfile)
207                 {
208                 untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
209                                         NULL, e, "untrusted certificates");
210                 if(!untrusted)
211                         goto end;
212                 }
213
214         if(trustfile)
215                 {
216                 trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
217                                         NULL, e, "trusted certificates");
218                 if(!trusted)
219                         goto end;
220                 }
221
222         if(crlfile)
223                 {
224                 crls = load_crls(bio_err, crlfile, FORMAT_PEM,
225                                         NULL, e, "other CRLs");
226                 if(!crls)
227                         goto end;
228                 }
229
230         if (crl_download)
231                 store_setup_crl_download(cert_ctx);
232
233         ret=0;
234         if (argc < 1)
235                 { 
236                 if (1 != check(cert_ctx, NULL, untrusted, trusted, crls, e, show_chain))
237                         ret=-1;
238                 }
239         else
240                 {
241                 for (i=0; i<argc; i++)
242                         if (1 != check(cert_ctx,argv[i], untrusted, trusted, crls, e, show_chain))
243                                 ret=-1;
244                 }
245
246 end:
247         if (ret == 1) {
248                 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
249 #ifndef OPENSSL_NO_ENGINE
250                 BIO_printf(bio_err," [-engine e]");
251 #endif
252                 BIO_printf(bio_err," cert1 cert2 ...\n");
253
254                 BIO_printf(bio_err,"recognized usages:\n");
255                 for(i = 0; i < X509_PURPOSE_get_count(); i++)
256                         {
257                         X509_PURPOSE *ptmp;
258                         ptmp = X509_PURPOSE_get0(i);
259                         BIO_printf(bio_err, "\t%-10s\t%s\n",
260                                    X509_PURPOSE_get0_sname(ptmp),
261                                    X509_PURPOSE_get0_name(ptmp));
262                         }
263
264                 BIO_printf(bio_err,"recognized verify names:\n");
265                 for(i = 0; i < X509_VERIFY_PARAM_get_count(); i++)
266                         {
267                         const X509_VERIFY_PARAM *vptmp;
268                         vptmp = X509_VERIFY_PARAM_get0(i);
269                         BIO_printf(bio_err, "\t%-10s\n",
270                                         X509_VERIFY_PARAM_get0_name(vptmp));
271                         }
272
273         }
274         if (vpm) X509_VERIFY_PARAM_free(vpm);
275         if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
276         sk_X509_pop_free(untrusted, X509_free);
277         sk_X509_pop_free(trusted, X509_free);
278         sk_X509_CRL_pop_free(crls, X509_CRL_free);
279         apps_shutdown();
280         OPENSSL_EXIT(ret < 0 ? 2 : ret);
281         }
282
283 static int check(X509_STORE *ctx, char *file,
284                 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
285                 STACK_OF(X509_CRL) *crls, ENGINE *e, int show_chain)
286         {
287         X509 *x=NULL;
288         int i=0,ret=0;
289         X509_STORE_CTX *csc;
290         STACK_OF(X509) *chain = NULL;
291
292         x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
293         if (x == NULL)
294                 goto end;
295         fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
296
297         csc = X509_STORE_CTX_new();
298         if (csc == NULL)
299                 {
300                 ERR_print_errors(bio_err);
301                 goto end;
302                 }
303         X509_STORE_set_flags(ctx, vflags);
304         if(!X509_STORE_CTX_init(csc,ctx,x,uchain))
305                 {
306                 ERR_print_errors(bio_err);
307                 goto end;
308                 }
309         if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
310         if (crls)
311                 X509_STORE_CTX_set0_crls(csc, crls);
312         i=X509_verify_cert(csc);
313         if (i > 0 && show_chain)
314                 chain = X509_STORE_CTX_get1_chain(csc);
315         X509_STORE_CTX_free(csc);
316
317         ret=0;
318 end:
319         if (i > 0)
320                 {
321                 fprintf(stdout,"OK\n");
322                 ret=1;
323                 }
324         else
325                 ERR_print_errors(bio_err);
326         if (chain)
327                 {
328                 printf("Chain:\n");
329                 for (i = 0; i < sk_X509_num(chain); i++)
330                         {
331                         X509 *cert = sk_X509_value(chain, i);
332                         printf("depth=%d: ", i);
333                         X509_NAME_print_ex_fp(stdout,
334                                 X509_get_subject_name(cert),
335                                 0, XN_FLAG_ONELINE);
336                         printf("\n");
337                         }
338                 sk_X509_pop_free(chain, X509_free);
339                 }
340         if (x != NULL) X509_free(x);
341
342         return(ret);
343         }
344
345 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
346         {
347         int cert_error = X509_STORE_CTX_get_error(ctx);
348         X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
349
350         if (!ok)
351                 {
352                 if (current_cert)
353                         {
354                         X509_NAME_print_ex_fp(stdout,
355                                 X509_get_subject_name(current_cert),
356                                 0, XN_FLAG_ONELINE);
357                         printf("\n");
358                         }
359                 printf("%serror %d at %d depth lookup:%s\n",
360                         X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
361                         cert_error,
362                         X509_STORE_CTX_get_error_depth(ctx),
363                         X509_verify_cert_error_string(cert_error));
364                 switch(cert_error)
365                         {
366                         case X509_V_ERR_NO_EXPLICIT_POLICY:
367                                 policies_print(NULL, ctx);
368                         case X509_V_ERR_CERT_HAS_EXPIRED:
369
370                         /* since we are just checking the certificates, it is
371                          * ok if they are self signed. But we should still warn
372                          * the user.
373                          */
374
375                         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
376                         /* Continue after extension errors too */
377                         case X509_V_ERR_INVALID_CA:
378                         case X509_V_ERR_INVALID_NON_CA:
379                         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
380                         case X509_V_ERR_INVALID_PURPOSE:
381                         case X509_V_ERR_CRL_HAS_EXPIRED:
382                         case X509_V_ERR_CRL_NOT_YET_VALID:
383                         case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
384                         ok = 1;
385
386                         }
387
388                 return ok;
389
390                 }
391         if (cert_error == X509_V_OK && ok == 2)
392                 policies_print(NULL, ctx);
393         if (!v_verbose)
394                 ERR_clear_error();
395         return(ok);
396         }