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115 lines
4.1 KiB
C
115 lines
4.1 KiB
C
/* crypto/ecdsa/ecdsa_sign.c */
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/* ====================================================================
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* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include "ecs_locl.h"
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#ifndef OPENSSL_NO_ENGINE
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#include <openssl/engine.h>
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#endif
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#include <openssl/rand.h>
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#include <openssl/err.h>
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ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
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{
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return ECDSA_do_sign_ex(dgst, dlen, NULL, NULL, eckey);
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}
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ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dlen,
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const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey)
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{
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ECDSA_DATA *ecdsa = ecdsa_check(eckey);
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if (ecdsa == NULL)
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return NULL;
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return ecdsa->meth->ecdsa_do_sign(dgst, dlen, kinv, rp, eckey);
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}
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int ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char
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*sig, unsigned int *siglen, EC_KEY *eckey)
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{
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return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
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}
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int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char
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*sig, unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *r,
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EC_KEY *eckey)
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{
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ECDSA_SIG *s;
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RAND_seed(dgst, dlen);
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s = ECDSA_do_sign_ex(dgst, dlen, kinv, r, eckey);
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if (s == NULL)
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{
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*siglen=0;
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return 0;
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}
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*siglen = i2d_ECDSA_SIG(s, &sig);
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ECDSA_SIG_free(s);
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return 1;
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}
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int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
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BIGNUM **rp)
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{
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ECDSA_DATA *ecdsa = ecdsa_check(eckey);
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if (ecdsa == NULL)
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return 0;
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if (EC_KEY_get_nonce_from_hash(eckey))
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{
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/* You cannot precompute the ECDSA nonce if it is required to
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* depend on the message. */
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ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ECDSA_R_NONCE_CANNOT_BE_PRECOMPUTED);
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return 0;
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}
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return ecdsa->meth->ecdsa_sign_setup(eckey, ctx_in, kinvp, rp, NULL, 0);
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}
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