crypto/ec/ecdsa_sign.c

   1 /* ====================================================================
   2  * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  *
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in
  13  *    the documentation and/or other materials provided with the
  14  *    distribution.
  15  *
  16  * 3. All advertising materials mentioning features or use of this
  17  *    software must display the following acknowledgment:
  18  *    "This product includes software developed by the OpenSSL Project
  19  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  20  *
  21  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  22  *    endorse or promote products derived from this software without
  23  *    prior written permission. For written permission, please contact
  24  *    openssl-core@OpenSSL.org.
  25  *
  26  * 5. Products derived from this software may not be called "OpenSSL"
  27  *    nor may "OpenSSL" appear in their names without prior written
  28  *    permission of the OpenSSL Project.
  29  *
  30  * 6. Redistributions of any form whatsoever must retain the following
  31  *    acknowledgment:
  32  *    "This product includes software developed by the OpenSSL Project
  33  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  36  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  38  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  42  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  44  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  45  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  46  * OF THE POSSIBILITY OF SUCH DAMAGE.
  47  * ====================================================================
  48  *
  49  * This product includes cryptographic software written by Eric Young
  50  * (eay@cryptsoft.com).  This product includes software written by Tim
  51  * Hudson (tjh@cryptsoft.com).
  52  *
  53  */
  54
  55 #include <openssl/ec.h>
  56 #include "ec_lcl.h"
  57 #include <openssl/engine.h>
  58 #include <openssl/rand.h>
  59 #include <openssl/err.h>
  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,
  68                             EC_KEY *eckey)
  69 {
  70     if (eckey->meth->sign_sig != NULL)
  71         return eckey->meth->sign_sig(dgst, dlen, kinv, rp, eckey);
  72     ECerr(EC_F_ECDSA_DO_SIGN_EX, EC_R_OPERATION_NOT_SUPPORTED);
  73     return NULL;
  74 }
  75
  76 int ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char
  77                *sig, unsigned int *siglen, EC_KEY *eckey)
  78 {
  79     return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
  80 }
  81
  82 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen,
  83                   unsigned char *sig, unsigned int *siglen, const BIGNUM *kinv,
  84                   const BIGNUM *r, EC_KEY *eckey)
  85 {
  86     if (eckey->meth->sign != NULL)
  87         return eckey->meth->sign(type, dgst, dlen, sig, siglen, kinv, r, eckey);
  88     ECerr(EC_F_ECDSA_SIGN_EX, EC_R_OPERATION_NOT_SUPPORTED);
  89     return 0;
  90 }
  91
  92 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
  93                      BIGNUM **rp)
  94 {
  95     if (eckey->meth->sign_setup != NULL)
  96         return eckey->meth->sign_setup(eckey, ctx_in, kinvp, rp);
  97     ECerr(EC_F_ECDSA_SIGN_SETUP, EC_R_OPERATION_NOT_SUPPORTED);
  98     return 0;
  99 }