crypto/openssl-0.9/crypto/ecdsa/ecs_sign.c

   1 /* crypto/ecdsa/ecdsa_sign.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 "ecs_locl.h"
  57 #ifndef OPENSSL_NO_ENGINE
  58 #include <openssl/engine.h>
  59 #endif
  60
  61 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
  62 {
  63         return ECDSA_do_sign_ex(dgst, dlen, NULL, NULL, eckey);
  64 }
  65
  66 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dlen,
  67         const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey)
  68 {
  69         ECDSA_DATA *ecdsa = ecdsa_check(eckey);
  70         if (ecdsa == NULL)
  71                 return NULL;
  72         return ecdsa->meth->ecdsa_do_sign(dgst, dlen, kinv, rp, eckey);
  73 }
  74
  75 int ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char
  76                 *sig, unsigned int *siglen, EC_KEY *eckey)
  77 {
  78         return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
  79 }
  80
  81 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char
  82         *sig, unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *r,
  83         EC_KEY *eckey)
  84 {
  85         ECDSA_SIG *s;
  86         s = ECDSA_do_sign_ex(dgst, dlen, kinv, r, eckey);
  87         if (s == NULL)
  88         {
  89                 *siglen=0;
  90                 return 0;
  91         }
  92         *siglen = i2d_ECDSA_SIG(s, &sig);
  93         ECDSA_SIG_free(s);
  94         return 1;
  95 }
  96
  97 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
  98                 BIGNUM **rp)
  99 {
 100         ECDSA_DATA *ecdsa = ecdsa_check(eckey);
 101         if (ecdsa == NULL)
 102                 return 0;
 103         return ecdsa->meth->ecdsa_sign_setup(eckey, ctx_in, kinvp, rp);
 104 }