f384de6d296311bf718b83e72d1573c54d45192c
[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 #include <openssl/engine.h>
69
70 #undef PROG
71 #define PROG    verify_main
72
73 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx);
74 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose);
75 static STACK_OF(X509) *load_untrusted(char *file);
76 static int v_verbose=0, issuer_checks = 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;
84         int purpose = -1;
85         char *CApath=NULL,*CAfile=NULL;
86         char *untfile = NULL, *trustfile = NULL;
87         STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
88         X509_STORE *cert_ctx=NULL;
89         X509_LOOKUP *lookup=NULL;
90         char *engine=NULL;
91
92         cert_ctx=X509_STORE_new();
93         if (cert_ctx == NULL) goto end;
94         X509_STORE_set_verify_cb_func(cert_ctx,cb);
95
96         ERR_load_crypto_strings();
97
98         apps_startup();
99
100         if (bio_err == NULL)
101                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
102                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
103
104         argc--;
105         argv++;
106         for (;;)
107                 {
108                 if (argc >= 1)
109                         {
110                         if (strcmp(*argv,"-CApath") == 0)
111                                 {
112                                 if (argc-- < 1) goto end;
113                                 CApath= *(++argv);
114                                 }
115                         else if (strcmp(*argv,"-CAfile") == 0)
116                                 {
117                                 if (argc-- < 1) goto end;
118                                 CAfile= *(++argv);
119                                 }
120                         else if (strcmp(*argv,"-purpose") == 0)
121                                 {
122                                 X509_PURPOSE *xptmp;
123                                 if (argc-- < 1) goto end;
124                                 i = X509_PURPOSE_get_by_sname(*(++argv));
125                                 if(i < 0)
126                                         {
127                                         BIO_printf(bio_err, "unrecognized purpose\n");
128                                         goto end;
129                                         }
130                                 xptmp = X509_PURPOSE_get0(i);
131                                 purpose = X509_PURPOSE_get_id(xptmp);
132                                 }
133                         else if (strcmp(*argv,"-untrusted") == 0)
134                                 {
135                                 if (argc-- < 1) goto end;
136                                 untfile= *(++argv);
137                                 }
138                         else if (strcmp(*argv,"-trusted") == 0)
139                                 {
140                                 if (argc-- < 1) goto end;
141                                 trustfile= *(++argv);
142                                 }
143                         else if (strcmp(*argv,"-engine") == 0)
144                                 {
145                                 if (--argc < 1) goto end;
146                                 engine= *(++argv);
147                                 }
148                         else if (strcmp(*argv,"-help") == 0)
149                                 goto end;
150                         else if (strcmp(*argv,"-issuer_checks") == 0)
151                                 issuer_checks=1;
152                         else if (strcmp(*argv,"-verbose") == 0)
153                                 v_verbose=1;
154                         else if (argv[0][0] == '-')
155                                 goto end;
156                         else
157                                 break;
158                         argc--;
159                         argv++;
160                         }
161                 else
162                         break;
163                 }
164
165         if (engine != NULL)
166                 {
167                 if((e = ENGINE_by_id(engine)) == NULL)
168                         {
169                         BIO_printf(bio_err,"invalid engine \"%s\"\n",
170                                 engine);
171                         goto end;
172                         }
173                 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL))
174                         {
175                         BIO_printf(bio_err,"can't use that engine\n");
176                         goto end;
177                         }
178                 BIO_printf(bio_err,"engine \"%s\" set.\n", engine);
179                 /* Free our "structural" reference. */
180                 ENGINE_free(e);
181                 }
182
183         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
184         if (lookup == NULL) abort();
185         if (CAfile) {
186                 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
187                 if(!i) {
188                         BIO_printf(bio_err, "Error loading file %s\n", CAfile);
189                         ERR_print_errors(bio_err);
190                         goto end;
191                 }
192         } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
193                 
194         lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
195         if (lookup == NULL) abort();
196         if (CApath) {
197                 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
198                 if(!i) {
199                         BIO_printf(bio_err, "Error loading directory %s\n", CApath);
200                         ERR_print_errors(bio_err);
201                         goto end;
202                 }
203         } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
204
205         ERR_clear_error();
206
207         if(untfile) {
208                 if(!(untrusted = load_untrusted(untfile))) {
209                         BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
210                         ERR_print_errors(bio_err);
211                         goto end;
212                 }
213         }
214
215         if(trustfile) {
216                 if(!(trusted = load_untrusted(trustfile))) {
217                         BIO_printf(bio_err, "Error loading untrusted file %s\n", trustfile);
218                         ERR_print_errors(bio_err);
219                         goto end;
220                 }
221         }
222
223         if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, purpose);
224         else
225                 for (i=0; i<argc; i++)
226                         check(cert_ctx,argv[i], untrusted, trusted, purpose);
227         ret=0;
228 end:
229         if (ret == 1) {
230                 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-engine e] cert1 cert2 ...\n");
231                 BIO_printf(bio_err,"recognized usages:\n");
232                 for(i = 0; i < X509_PURPOSE_get_count(); i++) {
233                         X509_PURPOSE *ptmp;
234                         ptmp = X509_PURPOSE_get0(i);
235                         BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),
236                                                                 X509_PURPOSE_get0_name(ptmp));
237                 }
238         }
239         if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
240         sk_X509_pop_free(untrusted, X509_free);
241         sk_X509_pop_free(trusted, X509_free);
242         EXIT(ret);
243         }
244
245 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose)
246         {
247         X509 *x=NULL;
248         BIO *in=NULL;
249         int i=0,ret=0;
250         X509_STORE_CTX *csc;
251
252         in=BIO_new(BIO_s_file());
253         if (in == NULL)
254                 {
255                 ERR_print_errors(bio_err);
256                 goto end;
257                 }
258
259         if (file == NULL)
260                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
261         else
262                 {
263                 if (BIO_read_filename(in,file) <= 0)
264                         {
265                         perror(file);
266                         goto end;
267                         }
268                 }
269
270         x=PEM_read_bio_X509(in,NULL,NULL,NULL);
271         if (x == NULL)
272                 {
273                 fprintf(stdout,"%s: unable to load certificate file\n",
274                         (file == NULL)?"stdin":file);
275                 ERR_print_errors(bio_err);
276                 goto end;
277                 }
278         fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
279
280         csc = X509_STORE_CTX_new();
281         if (csc == NULL)
282                 {
283                 ERR_print_errors(bio_err);
284                 goto end;
285                 }
286         X509_STORE_CTX_init(csc,ctx,x,uchain);
287         if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
288         if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose);
289         if(issuer_checks)
290                 X509_STORE_CTX_set_flags(csc, X509_V_FLAG_CB_ISSUER_CHECK);
291         i=X509_verify_cert(csc);
292         X509_STORE_CTX_free(csc);
293
294         ret=0;
295 end:
296         if (i)
297                 {
298                 fprintf(stdout,"OK\n");
299                 ret=1;
300                 }
301         else
302                 ERR_print_errors(bio_err);
303         if (x != NULL) X509_free(x);
304         if (in != NULL) BIO_free(in);
305
306         return(ret);
307         }
308
309 static STACK_OF(X509) *load_untrusted(char *certfile)
310 {
311         STACK_OF(X509_INFO) *sk=NULL;
312         STACK_OF(X509) *stack=NULL, *ret=NULL;
313         BIO *in=NULL;
314         X509_INFO *xi;
315
316         if(!(stack = sk_X509_new_null())) {
317                 BIO_printf(bio_err,"memory allocation failure\n");
318                 goto end;
319         }
320
321         if(!(in=BIO_new_file(certfile, "r"))) {
322                 BIO_printf(bio_err,"error opening the file, %s\n",certfile);
323                 goto end;
324         }
325
326         /* This loads from a file, a stack of x509/crl/pkey sets */
327         if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) {
328                 BIO_printf(bio_err,"error reading the file, %s\n",certfile);
329                 goto end;
330         }
331
332         /* scan over it and pull out the certs */
333         while (sk_X509_INFO_num(sk))
334                 {
335                 xi=sk_X509_INFO_shift(sk);
336                 if (xi->x509 != NULL)
337                         {
338                         sk_X509_push(stack,xi->x509);
339                         xi->x509=NULL;
340                         }
341                 X509_INFO_free(xi);
342                 }
343         if(!sk_X509_num(stack)) {
344                 BIO_printf(bio_err,"no certificates in file, %s\n",certfile);
345                 sk_X509_free(stack);
346                 goto end;
347         }
348         ret=stack;
349 end:
350         BIO_free(in);
351         sk_X509_INFO_free(sk);
352         return(ret);
353         }
354
355 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
356         {
357         char buf[256];
358
359         if (!ok)
360                 {
361                 X509_NAME_oneline(
362                                 X509_get_subject_name(ctx->current_cert),buf,256);
363                 printf("%s\n",buf);
364                 printf("error %d at %d depth lookup:%s\n",ctx->error,
365                         ctx->error_depth,
366                         X509_verify_cert_error_string(ctx->error));
367                 if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1;
368                 /* since we are just checking the certificates, it is
369                  * ok if they are self signed. But we should still warn
370                  * the user.
371                  */
372                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
373                 /* Continue after extension errors too */
374                 if (ctx->error == X509_V_ERR_INVALID_CA) ok=1;
375                 if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1;
376                 if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1;
377                 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
378                 }
379         if (!v_verbose)
380                 ERR_clear_error();
381         return(ok);
382         }
383