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 <stdlib.h>
60 #include <string.h>
61 #include <openssl/bio.h>
62 #include <openssl/x509.h>
63 #include <openssl/pem.h>
64 #include <openssl/err.h>
65 #include <openssl/asn1.h>
66
67 int verify_callback(int ok, X509_STORE_CTX *ctx);
68
69 BIO *bio_err=NULL;
70
main(argc,argv)71 int main(argc,argv)
72 int argc;
73 char *argv[];
74 {
75 char *keyfile=NULL;
76 BIO *in;
77 EVP_PKEY *pkey;
78 X509 *x509;
79 PKCS7 *p7;
80 PKCS7_SIGNER_INFO *si;
81 X509_STORE_CTX cert_ctx;
82 X509_STORE *cert_store=NULL;
83 BIO *data,*detached=NULL,*p7bio=NULL;
84 char buf[1024*4];
85 unsigned char *pp;
86 int i,printit=0;
87 STACK_OF(PKCS7_SIGNER_INFO) *sk;
88
89 OpenSSL_add_all_algorithms();
90 bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
91
92 data=BIO_new(BIO_s_file());
93 pp=NULL;
94 while (argc > 1)
95 {
96 argc--;
97 argv++;
98 if (strcmp(argv[0],"-p") == 0)
99 {
100 printit=1;
101 }
102 else if ((strcmp(argv[0],"-k") == 0) && (argc >= 2)) {
103 keyfile = argv[1];
104 argc-=1;
105 argv+=1;
106 } else if ((strcmp(argv[0],"-d") == 0) && (argc >= 2))
107 {
108 detached=BIO_new(BIO_s_file());
109 if (!BIO_read_filename(detached,argv[1]))
110 goto err;
111 argc-=1;
112 argv+=1;
113 }
114 else break;
115 }
116
117 if (!BIO_read_filename(data,argv[0])) goto err;
118
119 if(!keyfile) {
120 fprintf(stderr, "No private key file specified\n");
121 goto err;
122 }
123
124 if ((in=BIO_new_file(keyfile,"r")) == NULL) goto err;
125 if ((x509=PEM_read_bio_X509(in,NULL,NULL,NULL)) == NULL) goto err;
126 BIO_reset(in);
127 if ((pkey=PEM_read_bio_PrivateKey(in,NULL,NULL,NULL)) == NULL)
128 goto err;
129 BIO_free(in);
130
131 if (pp == NULL)
132 BIO_set_fp(data,stdin,BIO_NOCLOSE);
133
134
135 /* Load the PKCS7 object from a file */
136 if ((p7=PEM_read_bio_PKCS7(data,NULL,NULL,NULL)) == NULL) goto err;
137
138
139
140 /* This stuff is being setup for certificate verification.
141 * When using SSL, it could be replaced with a
142 * cert_stre=SSL_CTX_get_cert_store(ssl_ctx); */
143 cert_store=X509_STORE_new();
144 X509_STORE_set_default_paths(cert_store);
145 X509_STORE_load_locations(cert_store,NULL,"../../certs");
146 X509_STORE_set_verify_cb_func(cert_store,verify_callback);
147
148 ERR_clear_error();
149
150 /* We need to process the data */
151 /* We cannot support detached encryption */
152 p7bio=PKCS7_dataDecode(p7,pkey,detached,x509);
153
154 if (p7bio == NULL)
155 {
156 printf("problems decoding\n");
157 goto err;
158 }
159
160 /* We now have to 'read' from p7bio to calculate digests etc. */
161 for (;;)
162 {
163 i=BIO_read(p7bio,buf,sizeof(buf));
164 /* print it? */
165 if (i <= 0) break;
166 fwrite(buf,1, i, stdout);
167 }
168
169 /* We can now verify signatures */
170 sk=PKCS7_get_signer_info(p7);
171 if (sk == NULL)
172 {
173 fprintf(stderr, "there are no signatures on this data\n");
174 }
175 else
176 {
177 /* Ok, first we need to, for each subject entry,
178 * see if we can verify */
179 ERR_clear_error();
180 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(sk); i++)
181 {
182 si=sk_PKCS7_SIGNER_INFO_value(sk,i);
183 i=PKCS7_dataVerify(cert_store,&cert_ctx,p7bio,p7,si);
184 if (i <= 0)
185 goto err;
186 else
187 fprintf(stderr,"Signature verified\n");
188 }
189 }
190 X509_STORE_free(cert_store);
191
192 exit(0);
193 err:
194 ERR_load_crypto_strings();
195 ERR_print_errors_fp(stderr);
196 exit(1);
197 }
198
199 /* should be X509 * but we can just have them as char *. */
verify_callback(int ok,X509_STORE_CTX * ctx)200 int verify_callback(int ok, X509_STORE_CTX *ctx)
201 {
202 char buf[256];
203 X509 *err_cert;
204 int err,depth;
205
206 err_cert=X509_STORE_CTX_get_current_cert(ctx);
207 err= X509_STORE_CTX_get_error(ctx);
208 depth= X509_STORE_CTX_get_error_depth(ctx);
209
210 X509_NAME_oneline(X509_get_subject_name(err_cert),buf,256);
211 BIO_printf(bio_err,"depth=%d %s\n",depth,buf);
212 if (!ok)
213 {
214 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
215 X509_verify_cert_error_string(err));
216 if (depth < 6)
217 {
218 ok=1;
219 X509_STORE_CTX_set_error(ctx,X509_V_OK);
220 }
221 else
222 {
223 ok=0;
224 X509_STORE_CTX_set_error(ctx,X509_V_ERR_CERT_CHAIN_TOO_LONG);
225 }
226 }
227 switch (ctx->error)
228 {
229 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
230 X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),buf,256);
231 BIO_printf(bio_err,"issuer= %s\n",buf);
232 break;
233 case X509_V_ERR_CERT_NOT_YET_VALID:
234 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
235 BIO_printf(bio_err,"notBefore=");
236 ASN1_UTCTIME_print(bio_err,X509_get_notBefore(ctx->current_cert));
237 BIO_printf(bio_err,"\n");
238 break;
239 case X509_V_ERR_CERT_HAS_EXPIRED:
240 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
241 BIO_printf(bio_err,"notAfter=");
242 ASN1_UTCTIME_print(bio_err,X509_get_notAfter(ctx->current_cert));
243 BIO_printf(bio_err,"\n");
244 break;
245 }
246 BIO_printf(bio_err,"verify return:%d\n",ok);
247 return(ok);
248 }
249