crypto/ecdsa/ecs_vrf.c

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