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/*
Copyright (C) 2006-2007 Werner Dittmann
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Authors: Werner Dittmann <Werner.Dittmann@t-online.de>
*/
#ifndef _AESCFB_H__
#define _AESCFB_H__
#include <stdint.h>
/**
* @file aesCFB.h
* @brief Function that provide AES CFB mode support
*
* @ingroup GNU_ZRTP
* @{
*/
#ifndef AES_BLOCK_SIZE
#define AES_BLOCK_SIZE 16
#endif
/**
* Encrypt data with AES CFB mode, full block feedback size.
*
* This functions takes one data chunk and encrypts it with
* AES CFB mode. The lenght of the data may be arbitrary and
* it is not needed to be a multiple of AES blocksize.
*
* @param key
* Points to the key bytes.
* @param keyLength
* Length of the key in bytes
* @param IV
* The initialization vector which must be AES_BLOCKSIZE (16) bytes.
* @param data
* Points to a buffer that contains and receives the computed
* the data (in-place encryption).
* @param dataLength
* Length of the data in bytes
*/
void aesCfbEncrypt(uint8_t* key, int32_t keyLength, uint8_t* IV, uint8_t *data,
int32_t dataLength);
/**
* Decrypt data with AES CFB mode, full block feedback size.
*
* This functions takes one data chunk and decrypts it with
* AES CFB mode. The lenght of the data may be arbitrary and
* it is not needed to be a multiple of AES blocksize.
*
* @param key
* Points to the key bytes.
* @param keyLength
* Length of the key in bytes
* @param IV
* The initialization vector which must be AES_BLOCKSIZE (16) bytes.
* @param data
* Points to a buffer that contains and receives the computed
* the data (in-place decryption).
* @param dataLength
* Length of the data in bytes
*/
void aesCfbDecrypt(uint8_t* key, int32_t keyLength, const uint8_t* IV, uint8_t *data,
int32_t dataLength);
/**
* @}
*/
#endif
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