lib/libcrypto/ecdsa/ecs_sign.c

   1 /* $OpenBSD: ecs_sign.c,v 1.6 2015/02/08 13:35:07 jsing Exp $ */
   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/opensslconf.h>
  57
  58 #include "ecs_locl.h"
  59 #ifndef OPENSSL_NO_ENGINE
  60 #include <openssl/engine.h>
  61 #endif
  62
  63 ECDSA_SIG *
  64 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 *
  70 ECDSA_do_sign_ex(const unsigned char *dgst, int dlen, const BIGNUM *kinv,
  71     const BIGNUM *rp, EC_KEY *eckey)
  72 {
  73         ECDSA_DATA *ecdsa = ecdsa_check(eckey);
  74
  75         if (ecdsa == NULL)
  76                 return NULL;
  77         return ecdsa->meth->ecdsa_do_sign(dgst, dlen, kinv, rp, eckey);
  78 }
  79
  80 int
  81 ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig,
  82     unsigned int *siglen, EC_KEY *eckey)
  83 {
  84         return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
  85 }
  86
  87 int
  88 ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char *sig,
  89     unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *r, EC_KEY *eckey)
  90 {
  91         ECDSA_SIG *s;
  92
  93         s = ECDSA_do_sign_ex(dgst, dlen, kinv, r, eckey);
  94         if (s == NULL) {
  95                 *siglen = 0;
  96                 return 0;
  97         }
  98         *siglen = i2d_ECDSA_SIG(s, &sig);
  99         ECDSA_SIG_free(s);
 100         return 1;
 101 }
 102
 103 int
 104 ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
 105 {
 106         ECDSA_DATA *ecdsa = ecdsa_check(eckey);
 107
 108         if (ecdsa == NULL)
 109                 return 0;
 110         return ecdsa->meth->ecdsa_sign_setup(eckey, ctx_in, kinvp, rp);
 111 }