1 /* crypto/pkcs7/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 #include <stdio.h>
59 #include <string.h>
60 #include <openssl/bio.h>
61 #include <openssl/asn1.h>
62 #include <openssl/x509.h>
63 #include <openssl/pem.h>
64 #include <openssl/err.h>
65 #include "example.h"
66
67 int verify_callback(int ok, X509_STORE_CTX *ctx);
68
69 BIO *bio_err=NULL;
70 BIO *bio_out=NULL;
71
main(argc,argv)72 int main(argc,argv)
73 int argc;
74 char *argv[];
75 {
76 PKCS7 *p7;
77 PKCS7_SIGNER_INFO *si;
78 X509_STORE_CTX cert_ctx;
79 X509_STORE *cert_store=NULL;
80 BIO *data,*detached=NULL,*p7bio=NULL;
81 char buf[1024*4];
82 char *pp;
83 int i,printit=0;
84 STACK_OF(PKCS7_SIGNER_INFO) *sk;
85
86 bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
87 bio_out=BIO_new_fp(stdout,BIO_NOCLOSE);
88 #ifndef OPENSSL_NO_MD2
89 EVP_add_digest(EVP_md2());
90 #endif
91 #ifndef OPENSSL_NO_MD5
92 EVP_add_digest(EVP_md5());
93 #endif
94 #ifndef OPENSSL_NO_SHA1
95 EVP_add_digest(EVP_sha1());
96 #endif
97 #ifndef OPENSSL_NO_MDC2
98 EVP_add_digest(EVP_mdc2());
99 #endif
100
101 data=BIO_new(BIO_s_file());
102
103 pp=NULL;
104 while (argc > 1)
105 {
106 argc--;
107 argv++;
108 if (strcmp(argv[0],"-p") == 0)
109 {
110 printit=1;
111 }
112 else if ((strcmp(argv[0],"-d") == 0) && (argc >= 2))
113 {
114 detached=BIO_new(BIO_s_file());
115 if (!BIO_read_filename(detached,argv[1]))
116 goto err;
117 argc--;
118 argv++;
119 }
120 else
121 {
122 pp=argv[0];
123 if (!BIO_read_filename(data,argv[0]))
124 goto err;
125 }
126 }
127
128 if (pp == NULL)
129 BIO_set_fp(data,stdin,BIO_NOCLOSE);
130
131
132 /* Load the PKCS7 object from a file */
133 if ((p7=PEM_read_bio_PKCS7(data,NULL,NULL,NULL)) == NULL) goto err;
134
135 /* This stuff is being setup for certificate verification.
136 * When using SSL, it could be replaced with a
137 * cert_stre=SSL_CTX_get_cert_store(ssl_ctx); */
138 cert_store=X509_STORE_new();
139 X509_STORE_set_default_paths(cert_store);
140 X509_STORE_load_locations(cert_store,NULL,"../../certs");
141 X509_STORE_set_verify_cb_func(cert_store,verify_callback);
142
143 ERR_clear_error();
144
145 /* We need to process the data */
146 if ((PKCS7_get_detached(p7) || detached))
147 {
148 if (detached == NULL)
149 {
150 printf("no data to verify the signature on\n");
151 exit(1);
152 }
153 else
154 p7bio=PKCS7_dataInit(p7,detached);
155 }
156 else
157 {
158 p7bio=PKCS7_dataInit(p7,NULL);
159 }
160
161 /* We now have to 'read' from p7bio to calculate digests etc. */
162 for (;;)
163 {
164 i=BIO_read(p7bio,buf,sizeof(buf));
165 /* print it? */
166 if (i <= 0) break;
167 }
168
169 /* We can now verify signatures */
170 sk=PKCS7_get_signer_info(p7);
171 if (sk == NULL)
172 {
173 printf("there are no signatures on this data\n");
174 exit(1);
175 }
176
177 /* Ok, first we need to, for each subject entry, see if we can verify */
178 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(sk); i++)
179 {
180 ASN1_UTCTIME *tm;
181 char *str1,*str2;
182 int rc;
183
184 si=sk_PKCS7_SIGNER_INFO_value(sk,i);
185 rc=PKCS7_dataVerify(cert_store,&cert_ctx,p7bio,p7,si);
186 if (rc <= 0)
187 goto err;
188 printf("signer info\n");
189 if ((tm=get_signed_time(si)) != NULL)
190 {
191 BIO_printf(bio_out,"Signed time:");
192 ASN1_UTCTIME_print(bio_out,tm);
193 ASN1_UTCTIME_free(tm);
194 BIO_printf(bio_out,"\n");
195 }
196 if (get_signed_seq2string(si,&str1,&str2))
197 {
198 BIO_printf(bio_out,"String 1 is %s\n",str1);
199 BIO_printf(bio_out,"String 2 is %s\n",str2);
200 }
201
202 }
203
204 X509_STORE_free(cert_store);
205
206 printf("done\n");
207 exit(0);
208 err:
209 ERR_load_crypto_strings();
210 ERR_print_errors_fp(stderr);
211 exit(1);
212 }
213
214 /* should be X509 * but we can just have them as char *. */
verify_callback(int ok,X509_STORE_CTX * ctx)215 int verify_callback(int ok, X509_STORE_CTX *ctx)
216 {
217 char buf[256];
218 X509 *err_cert;
219 int err,depth;
220
221 err_cert=X509_STORE_CTX_get_current_cert(ctx);
222 err= X509_STORE_CTX_get_error(ctx);
223 depth= X509_STORE_CTX_get_error_depth(ctx);
224
225 X509_NAME_oneline(X509_get_subject_name(err_cert),buf,256);
226 BIO_printf(bio_err,"depth=%d %s\n",depth,buf);
227 if (!ok)
228 {
229 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
230 X509_verify_cert_error_string(err));
231 if (depth < 6)
232 {
233 ok=1;
234 X509_STORE_CTX_set_error(ctx,X509_V_OK);
235 }
236 else
237 {
238 ok=0;
239 X509_STORE_CTX_set_error(ctx,X509_V_ERR_CERT_CHAIN_TOO_LONG);
240 }
241 }
242 switch (ctx->error)
243 {
244 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
245 X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),buf,256);
246 BIO_printf(bio_err,"issuer= %s\n",buf);
247 break;
248 case X509_V_ERR_CERT_NOT_YET_VALID:
249 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
250 BIO_printf(bio_err,"notBefore=");
251 ASN1_UTCTIME_print(bio_err,X509_get_notBefore(ctx->current_cert));
252 BIO_printf(bio_err,"\n");
253 break;
254 case X509_V_ERR_CERT_HAS_EXPIRED:
255 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
256 BIO_printf(bio_err,"notAfter=");
257 ASN1_UTCTIME_print(bio_err,X509_get_notAfter(ctx->current_cert));
258 BIO_printf(bio_err,"\n");
259 break;
260 }
261 BIO_printf(bio_err,"verify return:%d\n",ok);
262 return(ok);
263 }
264