rsa-encrypt.c 1.4 KB
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/* rsa-encrypt.c
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 *
 * The RSA publickey algorithm. PKCS#1 encryption.
 */

/* nettle, low-level cryptographics library
 *
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 * Copyright (C) 2001 Niels Möller
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 *  
 * 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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 */

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

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#include "rsa.h"

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#include "pkcs1.h"
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int
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rsa_encrypt(const struct rsa_public_key *key,
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	    /* For padding */
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	    void *random_ctx, nettle_random_func *random,
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	    size_t length, const uint8_t *message,
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	    mpz_t gibberish)
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{
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  if (pkcs1_encrypt (key->size, random_ctx, random,
		     length, message, gibberish))
    {
      mpz_powm(gibberish, gibberish, key->e, key->n);
      return 1;
    }
  else
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    return 0;
}