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/* rsa-sha512-sign.c
*
* Signatures using RSA and SHA512.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001, 2003, 2006, 2010 Niels Möller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include "rsa.h"
#include "bignum.h"
#include "pkcs1.h"
int
rsa_sha512_sign(const struct rsa_private_key *key,
struct sha512_ctx *hash,
mpz_t s)
{
assert(key->size > 0);
if (pkcs1_rsa_sha512_encode(s, key->size - 1, hash))
{
rsa_compute_root(key, s, s);
return 1;
}
else
{
mpz_set_ui(s, 0);
return 0;
}
}
int
rsa_sha512_sign_digest(const struct rsa_private_key *key,
const uint8_t *digest,
mpz_t s)
{
assert(key->size > 0);
if (pkcs1_rsa_sha512_encode_digest(s, key->size - 1, digest))
{
rsa_compute_root(key, s, s);
return 1;
}
else
{
mpz_set_ui(s, 0);
return 0;
}
}
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