crypto/pkcs7/verify.c

   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 "asn1.h"
  60 #include "bio.h"
  61 #include "x509.h"
  62 #include "pem.h"
  63
  64 int verify_callback(int ok, X509_STORE_CTX *ctx);
  65
  66 BIO *bio_err=NULL;
  67 BIO *bio_out=NULL;
  68
  69 main(argc,argv)
  70 int argc;
  71 char *argv[];
  72         {
  73         X509 *x509,*x;
  74         PKCS7 *p7;
  75         PKCS7_SIGNED *s;
  76         PKCS7_SIGNER_INFO *si;
  77         PKCS7_ISSUER_AND_SERIAL *ias;
  78         X509_STORE_CTX cert_ctx;
  79         X509_STORE *cert_store=NULL;
  80         X509_LOOKUP *lookup=NULL;
  81         BIO *data,*detached=NULL,*p7bio=NULL;
  82         char buf[1024*4];
  83         unsigned char *p,*pp;
  84         int i,j,printit=0;
  85         STACK *sk;
  86
  87         bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
  88         bio_out=BIO_new_fp(stdout,BIO_NOCLOSE);
  89         EVP_add_digest(EVP_md2());
  90         EVP_add_digest(EVP_md5());
  91         EVP_add_digest(EVP_sha1());
  92         EVP_add_digest(EVP_mdc2());
  93
  94         data=BIO_new(BIO_s_file());
  95 again:
  96         pp=NULL;
  97         while (argc > 1)
  98                 {
  99                 argc--;
 100                 argv++;
 101                 if (strcmp(argv[0],"-p") == 0)
 102                         {
 103                         printit=1;
 104                         }
 105                 else if ((strcmp(argv[0],"-d") == 0) && (argc >= 2))
 106                         {
 107                         detached=BIO_new(BIO_s_file());
 108                         if (!BIO_read_filename(detached,argv[1]))
 109                                 goto err;
 110                         argc--;
 111                         argv++;
 112                         }
 113                 else
 114                         {
 115                         pp=argv[0];
 116                         if (!BIO_read_filename(data,argv[0]))
 117                                 goto err;
 118                         }
 119                 }
 120
 121         if (pp == NULL)
 122                 BIO_set_fp(data,stdin,BIO_NOCLOSE);
 123
 124
 125         /* Load the PKCS7 object from a file */
 126         if ((p7=PEM_read_bio_PKCS7(data,NULL,NULL)) == NULL) goto err;
 127
 128         /* This stuff is being setup for certificate verification.
 129          * When using SSL, it could be replaced with a
 130          * cert_stre=SSL_CTX_get_cert_store(ssl_ctx); */
 131         cert_store=X509_STORE_new();
 132         X509_STORE_set_default_paths(cert_store);
 133         X509_STORE_load_locations(cert_store,NULL,"../../certs");
 134         X509_STORE_set_verify_cb_func(cert_store,verify_callback);
 135
 136         ERR_clear_error();
 137
 138         /* We need to process the data */
 139         if ((PKCS7_get_detached(p7) || detached))
 140                 {
 141                 if (detached == NULL)
 142                         {
 143                         printf("no data to verify the signature on\n");
 144                         exit(1);
 145                         }
 146                 else
 147                         p7bio=PKCS7_dataInit(p7,detached);
 148                 }
 149         else
 150                 {
 151                 p7bio=PKCS7_dataInit(p7,NULL);
 152                 }
 153
 154         /* We now have to 'read' from p7bio to calculate digests etc. */
 155         for (;;)
 156                 {
 157                 i=BIO_read(p7bio,buf,sizeof(buf));
 158                 /* print it? */
 159                 if (i <= 0) break;
 160                 }
 161
 162         /* We can now verify signatures */
 163         sk=PKCS7_get_signer_info(p7);
 164         if (sk == NULL)
 165                 {
 166                 printf("there are no signatures on this data\n");
 167                 exit(1);
 168                 }
 169
 170         /* Ok, first we need to, for each subject entry, see if we can verify */
 171         for (i=0; i<sk_num(sk); i++)
 172                 {
 173                 ASN1_UTCTIME *tm;
 174                 char *str1,*str2;
 175
 176                 si=(PKCS7_SIGNER_INFO *)sk_value(sk,i);
 177                 i=PKCS7_dataVerify(cert_store,&cert_ctx,p7bio,p7,si);
 178                 if (i <= 0)
 179                         goto err;
 180                 printf("signer info\n");
 181                 if ((tm=get_signed_time(si)) != NULL)
 182                         {
 183                         BIO_printf(bio_out,"Signed time:");
 184                         ASN1_UTCTIME_print(bio_out,tm);
 185                         ASN1_UTCTIME_free(tm);
 186                         BIO_printf(bio_out,"\n");
 187                         }
 188                 if (get_signed_seq2string(si,&str1,&str2))
 189                         {
 190                         BIO_printf(bio_out,"String 1 is %s\n",str1);
 191                         BIO_printf(bio_out,"String 2 is %s\n",str2);
 192                         }
 193
 194                 }
 195
 196         X509_STORE_free(cert_store);
 197
 198         printf("done\n");
 199         exit(0);
 200 err:
 201         ERR_load_crypto_strings();
 202         ERR_print_errors_fp(stderr);
 203         exit(1);
 204         }
 205
 206 /* should be X509 * but we can just have them as char *. */
 207 int verify_callback(ok, ctx)
 208 int ok;
 209 X509_STORE_CTX *ctx;
 210         {
 211         char buf[256];
 212         X509 *err_cert;
 213         int err,depth;
 214
 215         err_cert=X509_STORE_CTX_get_current_cert(ctx);
 216         err=    X509_STORE_CTX_get_error(ctx);
 217         depth=  X509_STORE_CTX_get_error_depth(ctx);
 218
 219         X509_NAME_oneline(X509_get_subject_name(err_cert),buf,256);
 220         BIO_printf(bio_err,"depth=%d %s\n",depth,buf);
 221         if (!ok)
 222                 {
 223                 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
 224                         X509_verify_cert_error_string(err));
 225                 if (depth < 6)
 226                         {
 227                         ok=1;
 228                         X509_STORE_CTX_set_error(ctx,X509_V_OK);
 229                         }
 230                 else
 231                         {
 232                         ok=0;
 233                         X509_STORE_CTX_set_error(ctx,X509_V_ERR_CERT_CHAIN_TOO_LONG);
 234                         }
 235                 }
 236         switch (ctx->error)
 237                 {
 238         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 239                 X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),buf,256);
 240                 BIO_printf(bio_err,"issuer= %s\n",buf);
 241                 break;
 242         case X509_V_ERR_CERT_NOT_YET_VALID:
 243         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 244                 BIO_printf(bio_err,"notBefore=");
 245                 ASN1_UTCTIME_print(bio_err,X509_get_notBefore(ctx->current_cert));
 246                 BIO_printf(bio_err,"\n");
 247                 break;
 248         case X509_V_ERR_CERT_HAS_EXPIRED:
 249         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 250                 BIO_printf(bio_err,"notAfter=");
 251                 ASN1_UTCTIME_print(bio_err,X509_get_notAfter(ctx->current_cert));
 252                 BIO_printf(bio_err,"\n");
 253                 break;
 254                 }
 255         BIO_printf(bio_err,"verify return:%d\n",ok);
 256         return(ok);
 257         }