xref: /freebsd/crypto/openssl/apps/verify.c (revision ae83180158c4c937f170e31eff311b18c0286a93)
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 
358