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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);
76 static int v_verbose=0, vflags = 0;
77 
78 int MAIN(int, char **);
79 
MAIN(int argc,char ** argv)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 #ifndef OPENSSL_NO_ENGINE
92 	char *engine=NULL;
93 #endif
94 
95 	cert_ctx=X509_STORE_new();
96 	if (cert_ctx == NULL) goto end;
97 	X509_STORE_set_verify_cb(cert_ctx,cb);
98 
99 	ERR_load_crypto_strings();
100 
101 	apps_startup();
102 
103 	if (bio_err == NULL)
104 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
105 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
106 
107 	if (!load_config(bio_err, NULL))
108 		goto end;
109 
110 	argc--;
111 	argv++;
112 	for (;;)
113 		{
114 		if (argc >= 1)
115 			{
116 			if (strcmp(*argv,"-CApath") == 0)
117 				{
118 				if (argc-- < 1) goto end;
119 				CApath= *(++argv);
120 				}
121 			else if (strcmp(*argv,"-CAfile") == 0)
122 				{
123 				if (argc-- < 1) goto end;
124 				CAfile= *(++argv);
125 				}
126 			else if (args_verify(&argv, &argc, &badarg, bio_err,
127 									&vpm))
128 				{
129 				if (badarg)
130 					goto end;
131 				continue;
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,"-CRLfile") == 0)
144 				{
145 				if (argc-- < 1) goto end;
146 				crlfile= *(++argv);
147 				}
148 #ifndef OPENSSL_NO_ENGINE
149 			else if (strcmp(*argv,"-engine") == 0)
150 				{
151 				if (--argc < 1) goto end;
152 				engine= *(++argv);
153 				}
154 #endif
155 			else if (strcmp(*argv,"-help") == 0)
156 				goto end;
157 			else if (strcmp(*argv,"-verbose") == 0)
158 				v_verbose=1;
159 			else if (argv[0][0] == '-')
160 				goto end;
161 			else
162 				break;
163 			argc--;
164 			argv++;
165 			}
166 		else
167 			break;
168 		}
169 
170 #ifndef OPENSSL_NO_ENGINE
171         e = setup_engine(bio_err, engine, 0);
172 #endif
173 
174 	if (vpm)
175 		X509_STORE_set1_param(cert_ctx, vpm);
176 
177 	lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
178 	if (lookup == NULL) abort();
179 	if (CAfile) {
180 		i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
181 		if(!i) {
182 			BIO_printf(bio_err, "Error loading file %s\n", CAfile);
183 			ERR_print_errors(bio_err);
184 			goto end;
185 		}
186 	} else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
187 
188 	lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
189 	if (lookup == NULL) abort();
190 	if (CApath) {
191 		i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
192 		if(!i) {
193 			BIO_printf(bio_err, "Error loading directory %s\n", CApath);
194 			ERR_print_errors(bio_err);
195 			goto end;
196 		}
197 	} else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
198 
199 	ERR_clear_error();
200 
201 	if(untfile)
202 		{
203 		untrusted = load_certs(bio_err, untfile, FORMAT_PEM,
204 					NULL, e, "untrusted certificates");
205 		if(!untrusted)
206 			goto end;
207 		}
208 
209 	if(trustfile)
210 		{
211 		trusted = load_certs(bio_err, trustfile, FORMAT_PEM,
212 					NULL, e, "trusted certificates");
213 		if(!trusted)
214 			goto end;
215 		}
216 
217 	if(crlfile)
218 		{
219 		crls = load_crls(bio_err, crlfile, FORMAT_PEM,
220 					NULL, e, "other CRLs");
221 		if(!crls)
222 			goto end;
223 		}
224 
225 	if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, crls, e);
226 	else
227 		for (i=0; i<argc; i++)
228 			check(cert_ctx,argv[i], untrusted, trusted, crls, e);
229 	ret=0;
230 end:
231 	if (ret == 1) {
232 		BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");
233 #ifndef OPENSSL_NO_ENGINE
234 		BIO_printf(bio_err," [-engine e]");
235 #endif
236 		BIO_printf(bio_err," cert1 cert2 ...\n");
237 		BIO_printf(bio_err,"recognized usages:\n");
238 		for(i = 0; i < X509_PURPOSE_get_count(); i++) {
239 			X509_PURPOSE *ptmp;
240 			ptmp = X509_PURPOSE_get0(i);
241 			BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),
242 								X509_PURPOSE_get0_name(ptmp));
243 		}
244 	}
245 	if (vpm) X509_VERIFY_PARAM_free(vpm);
246 	if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
247 	sk_X509_pop_free(untrusted, X509_free);
248 	sk_X509_pop_free(trusted, X509_free);
249 	sk_X509_CRL_pop_free(crls, X509_CRL_free);
250 	apps_shutdown();
251 	OPENSSL_EXIT(ret);
252 	}
253 
check(X509_STORE * ctx,char * file,STACK_OF (X509)* uchain,STACK_OF (X509)* tchain,STACK_OF (X509_CRL)* crls,ENGINE * e)254 static int check(X509_STORE *ctx, char *file,
255 		STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
256 		STACK_OF(X509_CRL) *crls, ENGINE *e)
257 	{
258 	X509 *x=NULL;
259 	int i=0,ret=0;
260 	X509_STORE_CTX *csc;
261 
262 	x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");
263 	if (x == NULL)
264 		goto end;
265 	fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
266 
267 	csc = X509_STORE_CTX_new();
268 	if (csc == NULL)
269 		{
270 		ERR_print_errors(bio_err);
271 		goto end;
272 		}
273 	X509_STORE_set_flags(ctx, vflags);
274 	if(!X509_STORE_CTX_init(csc,ctx,x,uchain))
275 		{
276 		ERR_print_errors(bio_err);
277 		goto end;
278 		}
279 	if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
280 	if (crls)
281 		X509_STORE_CTX_set0_crls(csc, crls);
282 	i=X509_verify_cert(csc);
283 	X509_STORE_CTX_free(csc);
284 
285 	ret=0;
286 end:
287 	if (i > 0)
288 		{
289 		fprintf(stdout,"OK\n");
290 		ret=1;
291 		}
292 	else
293 		ERR_print_errors(bio_err);
294 	if (x != NULL) X509_free(x);
295 
296 	return(ret);
297 	}
298 
cb(int ok,X509_STORE_CTX * ctx)299 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
300 	{
301 	int cert_error = X509_STORE_CTX_get_error(ctx);
302 	X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
303 
304 	if (!ok)
305 		{
306 		if (current_cert)
307 			{
308 			X509_NAME_print_ex_fp(stdout,
309 				X509_get_subject_name(current_cert),
310 				0, XN_FLAG_ONELINE);
311 			printf("\n");
312 			}
313 		printf("%serror %d at %d depth lookup:%s\n",
314 			X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
315 			cert_error,
316 			X509_STORE_CTX_get_error_depth(ctx),
317 			X509_verify_cert_error_string(cert_error));
318 		switch(cert_error)
319 			{
320 			case X509_V_ERR_NO_EXPLICIT_POLICY:
321 				policies_print(NULL, ctx);
322 			case X509_V_ERR_CERT_HAS_EXPIRED:
323 
324 			/* since we are just checking the certificates, it is
325 			 * ok if they are self signed. But we should still warn
326 			 * the user.
327 			 */
328 
329 			case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
330 			/* Continue after extension errors too */
331 			case X509_V_ERR_INVALID_CA:
332 			case X509_V_ERR_INVALID_NON_CA:
333 			case X509_V_ERR_PATH_LENGTH_EXCEEDED:
334 			case X509_V_ERR_INVALID_PURPOSE:
335 			case X509_V_ERR_CRL_HAS_EXPIRED:
336 			case X509_V_ERR_CRL_NOT_YET_VALID:
337 			case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
338 			ok = 1;
339 
340 			}
341 
342 		return ok;
343 
344 		}
345 	if (cert_error == X509_V_OK && ok == 2)
346 		policies_print(NULL, ctx);
347 	if (!v_verbose)
348 		ERR_clear_error();
349 	return(ok);
350 	}
351