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/* noekeon.h */
/*
This file is part of the Crypto-avr-lib/microcrypt-lib.
Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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/>.
*/
#ifndef NOEKEON_H_
#define NOEKEON_H_
/**
* \author Daniel Otte
* \email daniel.otte@rub.de
* \date 2008-04-11
* \license GPLv3
* \brief
*
*
*/
#include <stdint.h>
typedef uint8_t noekeon_ctx_t[16];
/** \fn void noekeon_enc(void* buffer, void* key)
* \brief noekeon encrytion funtion
*
* This function encrypts a block (64 bit = 8 byte) with the noekeon encrytion
* algorithm. Due to the two modes of noekeon (direct mode and indirect mode)
* the second parameter either points directly to the key (direct mode) or to a
* context generated by the noekeon_init() function (indirect mode)
* \param buffer pointer to the 64 bit (8 byte) block to encrypt
* \param key pointer to either the key (128 bit = 16 byte; direct mode) or
* to the context (indirect mode)
*/
void noekeon_enc(void* buffer, const void* key);
/** \fn void noekeon_enc(void* buffer, void* key)
* \brief noekeon encrytion funtion
*
* This function decrypts a block (64 bit = 8 byte) encrypted with the noekeon
* encrytion algorithm. Due to the two modes of noekeon (direct mode and
* indirect mode) the second parameter either points directly to the key
* (direct mode) or to a context generated by the noekeon_init() function
* (indirect mode)
* \param buffer pointer to the 64 bit (8 byte) block to decrypt
* \param key pointer to either the key (128 bit = 16 byte; direct mode) or
* to the context (indirect mode)
*/
void noekeon_dec(void* buffer, const void* key);
/** \fn void noekeon_init(void* key, noekeon_ctx_t* ctx)
* \brief noekeon context generation function for indirect mode
*
* This function generates a context from the supplied key for using
* noekeon in indirect mode. For using noekeon in direct mode supply the key
* direct to the noekeon_enc() and noekeon_dec() functions
* \param key pointer to the key (128 bit = 16 byte)
* \param ctx pointer to the context to fill with key material
* to the context (indirect mode)
*/
void noekeon_init(const void* key, noekeon_ctx_t* ctx);
#endif /*NOEKEON_H_*/