4cd640f684
Same rationale as the previous commits.
(cherry picked from commit 422196759f)
Removed the winrt-specific parts.
112 lines
4 KiB
C
112 lines
4 KiB
C
/* crypto/ecdsa/ecdsa_vrf.c */
|
|
/*
|
|
* Written by Nils Larsch for the OpenSSL project
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* openssl-core@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include "ecs_locl.h"
|
|
#include <string.h>
|
|
#ifndef OPENSSL_NO_ENGINE
|
|
# include <openssl/engine.h>
|
|
#endif
|
|
|
|
/*-
|
|
* returns
|
|
* 1: correct signature
|
|
* 0: incorrect signature
|
|
* -1: error
|
|
*/
|
|
int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
|
|
const ECDSA_SIG *sig, EC_KEY *eckey)
|
|
{
|
|
ECDSA_DATA *ecdsa = ecdsa_check(eckey);
|
|
if (ecdsa == NULL)
|
|
return 0;
|
|
return ecdsa->meth->ecdsa_do_verify(dgst, dgst_len, sig, eckey);
|
|
}
|
|
|
|
/*-
|
|
* returns
|
|
* 1: correct signature
|
|
* 0: incorrect signature
|
|
* -1: error
|
|
*/
|
|
int ECDSA_verify(int type, const unsigned char *dgst, int dgst_len,
|
|
const unsigned char *sigbuf, int sig_len, EC_KEY *eckey)
|
|
{
|
|
ECDSA_SIG *s;
|
|
const unsigned char *p = sigbuf;
|
|
unsigned char *der = NULL;
|
|
int derlen = -1;
|
|
int ret = -1;
|
|
|
|
s = ECDSA_SIG_new();
|
|
if (s == NULL)
|
|
return (ret);
|
|
if (d2i_ECDSA_SIG(&s, &p, sig_len) == NULL)
|
|
goto err;
|
|
/* Ensure signature uses DER and doesn't have trailing garbage */
|
|
derlen = i2d_ECDSA_SIG(s, &der);
|
|
if (derlen != sig_len || memcmp(sigbuf, der, derlen))
|
|
goto err;
|
|
ret = ECDSA_do_verify(dgst, dgst_len, s, eckey);
|
|
err:
|
|
if (derlen > 0) {
|
|
OPENSSL_cleanse(der, derlen);
|
|
OPENSSL_free(der);
|
|
}
|
|
ECDSA_SIG_free(s);
|
|
return (ret);
|
|
}
|