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/*
* Copyright (C) 2000 Nikos Mavroyanopoulos
* Copyright (C) 2004 Free Software Foundation
*
* This file is part of GNUTLS.
*
* The GNUTLS 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.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <gnutls_cipher_int.h>
#include <gnutls_datum.h>
cipher_hd_t _gnutls_cipher_init( gnutls_cipher_algorithm cipher,
const gnutls_datum *key, const gnutls_datum *iv)
{
cipher_hd_t ret = NULL;
gcry_error_t err = GPG_ERR_GENERAL; /* doesn't matter */
switch (cipher) {
case GNUTLS_CIPHER_AES_128_CBC:
err = gcry_cipher_open(&ret, GCRY_CIPHER_RIJNDAEL, GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_AES_256_CBC:
err = gcry_cipher_open(&ret, GCRY_CIPHER_RIJNDAEL256, GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_3DES_CBC:
err = gcry_cipher_open(&ret, GCRY_CIPHER_3DES, GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_DES_CBC:
err = gcry_cipher_open(&ret, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_ARCFOUR_128:
case GNUTLS_CIPHER_ARCFOUR_40:
err = gcry_cipher_open(&ret, GCRY_CIPHER_ARCFOUR, GCRY_CIPHER_MODE_STREAM, 0);
break;
case GNUTLS_CIPHER_RC2_40_CBC:
err = gcry_cipher_open(&ret, GCRY_CIPHER_RFC2268_40, GCRY_CIPHER_MODE_CBC, 0);
break;
default:
return NULL;
}
if (err == 0) {
gcry_cipher_setkey(ret, key->data, key->size);
if (iv->data!=NULL && iv->size>0) gcry_cipher_setiv(ret, iv->data, iv->size);
} else if (cipher != GNUTLS_CIPHER_NULL) {
gnutls_assert();
_gnutls_x509_log("Gcrypt cipher[%d] error: %s\n", cipher, gcry_strerror(err));
}
return ret;
}
int _gnutls_cipher_encrypt(cipher_hd_t handle, void* text,
int textlen)
{
if (handle!=GNUTLS_CIPHER_FAILED) {
if (gcry_cipher_encrypt( handle, text, textlen, NULL, textlen)!=0) {
gnutls_assert();
return GNUTLS_E_INTERNAL_ERROR;
}
}
return 0;
}
int _gnutls_cipher_decrypt(cipher_hd_t handle, void* ciphertext,
int ciphertextlen)
{
if (handle!=GNUTLS_CIPHER_FAILED) {
if (gcry_cipher_decrypt( handle, ciphertext, ciphertextlen, NULL, ciphertextlen)!=0) {
gnutls_assert();
return GNUTLS_E_INTERNAL_ERROR;
}
}
return 0;
}
void _gnutls_cipher_deinit(cipher_hd_t handle)
{
if (handle!=GNUTLS_CIPHER_FAILED) {
gcry_cipher_close(handle);
}
}
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