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/*
* Copyright (C) 2008, 2010 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS 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.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA
*
*/
/* Here lie everything that has to do with large numbers, libgcrypt and
* other stuff that didn't fit anywhere else.
*/
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <gnutls_cipher_int.h>
#include <gcrypt.h>
/* Functions that refer to the libgcrypt library.
*/
static int
wrap_gcry_cipher_init (gnutls_cipher_algorithm_t algo, void **ctx)
{
int err;
switch (algo)
{
case GNUTLS_CIPHER_AES_128_CBC:
err =
gcry_cipher_open ((gcry_cipher_hd_t *) ctx, GCRY_CIPHER_AES128,
GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_AES_192_CBC:
err =
gcry_cipher_open ((gcry_cipher_hd_t *) ctx, GCRY_CIPHER_AES192,
GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_AES_256_CBC:
err =
gcry_cipher_open ((gcry_cipher_hd_t *) ctx, GCRY_CIPHER_AES256,
GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_3DES_CBC:
err =
gcry_cipher_open ((gcry_cipher_hd_t *) ctx, GCRY_CIPHER_3DES,
GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_DES_CBC:
err =
gcry_cipher_open ((gcry_cipher_hd_t *) ctx, GCRY_CIPHER_DES,
GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_ARCFOUR_128:
case GNUTLS_CIPHER_ARCFOUR_40:
err =
gcry_cipher_open ((gcry_cipher_hd_t *) ctx, GCRY_CIPHER_ARCFOUR,
GCRY_CIPHER_MODE_STREAM, 0);
break;
case GNUTLS_CIPHER_RC2_40_CBC:
err =
gcry_cipher_open ((gcry_cipher_hd_t *) ctx, GCRY_CIPHER_RFC2268_40,
GCRY_CIPHER_MODE_CBC, 0);
break;
#ifdef ENABLE_CAMELLIA
case GNUTLS_CIPHER_CAMELLIA_128_CBC:
err =
gcry_cipher_open ((gcry_cipher_hd_t *) ctx, GCRY_CIPHER_CAMELLIA128,
GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_CAMELLIA_256_CBC:
err =
gcry_cipher_open ((gcry_cipher_hd_t *) ctx, GCRY_CIPHER_CAMELLIA256,
GCRY_CIPHER_MODE_CBC, 0);
break;
#endif
default:
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
if (err == 0)
return 0;
gnutls_assert ();
return GNUTLS_E_ENCRYPTION_FAILED;
}
static int
wrap_gcry_cipher_setkey (void *ctx, const void *key, size_t keysize)
{
gcry_cipher_setkey (ctx, key, keysize);
return 0;
}
static int
wrap_gcry_cipher_setiv (void *ctx, const void *iv, size_t ivsize)
{
gcry_cipher_setiv (ctx, iv, ivsize);
return 0;
}
static int
wrap_gcry_cipher_decrypt (void *ctx, const void *encr, size_t encrsize,
void *plain, size_t plainsize)
{
int err;
err = gcry_cipher_decrypt (ctx, plain, plainsize, encr, encrsize);
if (err == 0)
return 0;
gnutls_assert ();
return GNUTLS_E_ENCRYPTION_FAILED;
}
static int
wrap_gcry_cipher_encrypt (void *ctx, const void *plain, size_t plainsize,
void *encr, size_t encrsize)
{
int err;
err = gcry_cipher_encrypt (ctx, encr, encrsize, plain, plainsize);
if (err == 0)
return 0;
gnutls_assert ();
return GNUTLS_E_ENCRYPTION_FAILED;
}
static void
wrap_gcry_cipher_close (void *h)
{
gcry_cipher_close (h);
}
gnutls_crypto_cipher_st _gnutls_cipher_ops = {
.init = wrap_gcry_cipher_init,
.setkey = wrap_gcry_cipher_setkey,
.setiv = wrap_gcry_cipher_setiv,
.encrypt = wrap_gcry_cipher_encrypt,
.decrypt = wrap_gcry_cipher_decrypt,
.deinit = wrap_gcry_cipher_close,
};
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