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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