/* rsa-sha256-sign.c

*

* Signatures using RSA and SHA256.

*/

/* nettle, low-level cryptographics library

*

* Copyright (C) 2001, 2003, 2006 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"

void

rsa_sha256_sign(const struct rsa_private_key *key,

struct sha256_ctx *hash,

mpz_t s)

{

assert(key->size >= RSA_MINIMUM_N_OCTETS);

pkcs1_rsa_sha256_encode(s, key->size - 1, hash);

rsa_compute_root(key, s, s);

}

void

rsa_sha256_sign_digest(const struct rsa_private_key *key,

const uint8_t *digest,

mpz_t s)

{

assert(key->size >= RSA_MINIMUM_N_OCTETS);

pkcs1_rsa_sha256_encode_digest(s, key->size - 1, digest);

rsa_compute_root(key, s, s);

}