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/*
* Copyright (C) 2018 Red Hat, Inc.
*
* Author: Simo Sorce
*
* 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 program. If not, see <http://www.gnu.org/licenses/>
*
*/
#ifndef GNUTLS_LIB_NETTLE_BACKPORT_XTS_H
#define GNUTLS_LIB_NETTLE_BACKPORT_XTS_H
#ifdef HAVE_XTS_ENCRYPT_MESSAGE
#include <nettle/xts.h>
#else /* Nettle version is old, use a vendored version instead */
#ifndef NETTLE_XTS_H_INCLUDED
#define NETTLE_XTS_H_INCLUDED
#include <nettle/nettle-types.h>
#include <nettle/aes.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Name mangling */
#define xts_encrypt_message nettle_xts_encrypt_message
#define xts_decrypt_message nettle_xts_decrypt_message
#define xts_aes128_set_encrypt_key nettle_xts_aes128_set_encrypt_key
#define xts_aes128_set_decrypt_key nettle_xts_aes128_set_decrypt_key
#define xts_aes128_encrypt_message nettle_xts_aes128_encrypt_message
#define xts_aes128_decrypt_message nettle_xts_aes128_decrypt_message
#define xts_aes256_set_encrypt_key nettle_xts_aes256_set_encrypt_key
#define xts_aes256_set_decrypt_key nettle_xts_aes256_set_decrypt_key
#define xts_aes256_encrypt_message nettle_xts_aes256_encrypt_message
#define xts_aes256_decrypt_message nettle_xts_aes256_decrypt_message
#define XTS_BLOCK_SIZE 16
void
xts_encrypt_message(const void *enc_ctx, const void *twk_ctx,
nettle_cipher_func *encf,
const uint8_t *tweak, size_t length,
uint8_t *dst, const uint8_t *src);
void
xts_decrypt_message(const void *dec_ctx, const void *twk_ctx,
nettle_cipher_func *decf, nettle_cipher_func *encf,
const uint8_t *tweak, size_t length,
uint8_t *dst, const uint8_t *src);
/* XTS Mode with AES-128 */
struct xts_aes128_key {
struct aes128_ctx cipher;
struct aes128_ctx tweak_cipher;
};
void
xts_aes128_set_encrypt_key(struct xts_aes128_key *xts_key,
const uint8_t *key);
void
xts_aes128_set_decrypt_key(struct xts_aes128_key *xts_key,
const uint8_t *key);
void
xts_aes128_encrypt_message(struct xts_aes128_key *xtskey,
const uint8_t *tweak, size_t length,
uint8_t *dst, const uint8_t *src);
void
xts_aes128_decrypt_message(struct xts_aes128_key *xts_key,
const uint8_t *tweak, size_t length,
uint8_t *dst, const uint8_t *src);
/* XTS Mode with AES-256 */
struct xts_aes256_key {
struct aes256_ctx cipher;
struct aes256_ctx tweak_cipher;
};
void
xts_aes256_set_encrypt_key(struct xts_aes256_key *xts_key,
const uint8_t *key);
void
xts_aes256_set_decrypt_key(struct xts_aes256_key *xts_key,
const uint8_t *key);
void
xts_aes256_encrypt_message(struct xts_aes256_key *xts_key,
const uint8_t *tweak, size_t length,
uint8_t *dst, const uint8_t *src);
void
xts_aes256_decrypt_message(struct xts_aes256_key *xts_key,
const uint8_t *tweak, size_t length,
uint8_t *dst, const uint8_t *src);
#ifdef __cplusplus
}
#endif
#endif /* NETTLE_XTS_H_INCLUDED */
#endif /* HAVE_XTS_ENCRYPT_MESSAGE */
#endif /* GNUTLS_LIB_NETTLE_BACKPORT_XTS_H */
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