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       1                 :            : /* crypto/ecdsa/ecdsa_vrf.c */
       2                 :            : /*
       3                 :            :  * Written by Nils Larsch for the OpenSSL project
       4                 :            :  */
       5                 :            : /* ====================================================================
       6                 :            :  * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
       7                 :            :  *
       8                 :            :  * Redistribution and use in source and binary forms, with or without
       9                 :            :  * modification, are permitted provided that the following conditions
      10                 :            :  * are met:
      11                 :            :  *
      12                 :            :  * 1. Redistributions of source code must retain the above copyright
      13                 :            :  *    notice, this list of conditions and the following disclaimer. 
      14                 :            :  *
      15                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      16                 :            :  *    notice, this list of conditions and the following disclaimer in
      17                 :            :  *    the documentation and/or other materials provided with the
      18                 :            :  *    distribution.
      19                 :            :  *
      20                 :            :  * 3. All advertising materials mentioning features or use of this
      21                 :            :  *    software must display the following acknowledgment:
      22                 :            :  *    "This product includes software developed by the OpenSSL Project
      23                 :            :  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
      24                 :            :  *
      25                 :            :  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
      26                 :            :  *    endorse or promote products derived from this software without
      27                 :            :  *    prior written permission. For written permission, please contact
      28                 :            :  *    openssl-core@OpenSSL.org.
      29                 :            :  *
      30                 :            :  * 5. Products derived from this software may not be called "OpenSSL"
      31                 :            :  *    nor may "OpenSSL" appear in their names without prior written
      32                 :            :  *    permission of the OpenSSL Project.
      33                 :            :  *
      34                 :            :  * 6. Redistributions of any form whatsoever must retain the following
      35                 :            :  *    acknowledgment:
      36                 :            :  *    "This product includes software developed by the OpenSSL Project
      37                 :            :  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
      38                 :            :  *
      39                 :            :  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
      40                 :            :  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      41                 :            :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
      42                 :            :  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
      43                 :            :  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      44                 :            :  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      45                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
      46                 :            :  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      47                 :            :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
      48                 :            :  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
      49                 :            :  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
      50                 :            :  * OF THE POSSIBILITY OF SUCH DAMAGE.
      51                 :            :  * ====================================================================
      52                 :            :  *
      53                 :            :  * This product includes cryptographic software written by Eric Young
      54                 :            :  * (eay@cryptsoft.com).  This product includes software written by Tim
      55                 :            :  * Hudson (tjh@cryptsoft.com).
      56                 :            :  *
      57                 :            :  */
      58                 :            : 
      59                 :            : #include "ecs_locl.h"
      60                 :            : #ifndef OPENSSL_NO_ENGINE
      61                 :            : #include <openssl/engine.h>
      62                 :            : #endif
      63                 :            : 
      64                 :            : /* returns
      65                 :            :  *      1: correct signature
      66                 :            :  *      0: incorrect signature
      67                 :            :  *     -1: error
      68                 :            :  */
      69                 :        339 : int ECDSA_do_verify(const unsigned char *dgst, int dgst_len, 
      70                 :            :                 const ECDSA_SIG *sig, EC_KEY *eckey)
      71                 :            :         {
      72                 :        339 :         ECDSA_DATA *ecdsa = ecdsa_check(eckey);
      73         [ +  - ]:        339 :         if (ecdsa == NULL)
      74                 :            :                 return 0;
      75                 :        339 :         return ecdsa->meth->ecdsa_do_verify(dgst, dgst_len, sig, eckey);
      76                 :            :         }
      77                 :            : 
      78                 :            : /* returns
      79                 :            :  *      1: correct signature
      80                 :            :  *      0: incorrect signature
      81                 :            :  *     -1: error
      82                 :            :  */
      83                 :        402 : int ECDSA_verify(int type, const unsigned char *dgst, int dgst_len,
      84                 :            :                 const unsigned char *sigbuf, int sig_len, EC_KEY *eckey)
      85                 :            :         {
      86                 :            :         ECDSA_SIG *s;
      87                 :        402 :         int ret=-1;
      88                 :            : 
      89                 :        402 :         s = ECDSA_SIG_new();
      90         [ +  - ]:        402 :         if (s == NULL) return(ret);
      91         [ +  + ]:        402 :         if (d2i_ECDSA_SIG(&s, &sigbuf, sig_len) == NULL) goto err;
      92                 :        335 :         ret=ECDSA_do_verify(dgst, dgst_len, s, eckey);
      93                 :            : err:
      94                 :        402 :         ECDSA_SIG_free(s);
      95                 :        402 :         return(ret);
      96                 :            :         }