crypto/ec/ecdsa_sign.c

   1 /* crypto/ec/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 <openssl/ec.h>
  57 #include "ec_lcl.h"
  58 #ifndef OPENSSL_NO_ENGINE
  59 # include <openssl/engine.h>
  60 #endif
  61 #include <openssl/rand.h>
  62 #include <openssl/err.h>
  63
  64 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
  65 {
  66     return ECDSA_do_sign_ex(dgst, dlen, NULL, NULL, eckey);
  67 }
  68
  69 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dlen,
  70                             const BIGNUM *kinv, const BIGNUM *rp,
  71                             EC_KEY *eckey)
  72 {
  73     if (eckey->meth->sign_sig != NULL)
  74         return eckey->meth->sign_sig(dgst, dlen, kinv, rp, eckey);
  75     ECerr(EC_F_ECDSA_DO_SIGN_EX, EC_R_OPERATION_NOT_SUPPORTED);
  76     return NULL;
  77 }
  78
  79 int ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char
  80                *sig, unsigned int *siglen, EC_KEY *eckey)
  81 {
  82     return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
  83 }
  84
  85 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen,
  86                   unsigned char *sig, unsigned int *siglen, const BIGNUM *kinv,
  87                   const BIGNUM *r, EC_KEY *eckey)
  88 {
  89     if (eckey->meth->sign != NULL)
  90         return eckey->meth->sign(type, dgst, dlen, sig, siglen, kinv, r, eckey);
  91     ECerr(EC_F_ECDSA_SIGN_EX, EC_R_OPERATION_NOT_SUPPORTED);
  92     return 0;
  93 }
  94
  95 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
  96                      BIGNUM **rp)
  97 {
  98     if (eckey->meth->sign_setup != NULL)
  99         return eckey->meth->sign_setup(eckey, ctx_in, kinvp, rp);
 100     ECerr(EC_F_ECDSA_SIGN_SETUP, EC_R_OPERATION_NOT_SUPPORTED);
 101     return 0;
 102 }