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 67int verify_callback(int ok, X509_STORE_CTX *ctx); 68 69BIO *bio_err=NULL; 70 71int main(argc,argv) 72int argc; 73char *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); 193err: 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 *. */ 200int 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