rsa-pkcs1-verify.c 1.29 KB
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/* rsa-pkcs1-sign.c
 *
 * PKCS#1 version 1.5 signatures.
 */

/* nettle, low-level cryptographics library
 *
 * Copyright (C) 2012 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
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 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02111-1301, USA.
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 */

#if HAVE_CONFIG_H
# include "config.h"
#endif

#include "rsa.h"

#include "pkcs1.h"

int
rsa_pkcs1_verify(const struct rsa_public_key *key,
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		 size_t length, const uint8_t *digest_info,
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		 const mpz_t s)
{
  int res;
  mpz_t m;

  mpz_init (m);

  res = (pkcs1_rsa_digest_encode (m, key->size, length, digest_info)
	 && _rsa_verify (key, m, s));

  mpz_clear(m);

  return res;
}