	/* aes_keyschedule.h */
	/*
	    This file is part of the AVR-Crypto-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/>.
	*/
	/**
	 * \file     aes_keyschedule.h
	 * \email    daniel.otte@rub.de
	 * \author   Daniel Otte
	 * \date     2008-12-30
	 * \license  GPLv3 or later
	 * \ingroup  AES
	 */
	
	
	#ifndef AES_KEYSCHEDULE_H_
	#define AES_KEYSCHEDULE_H_
	
	#include "aes_types.h"
	/**
	 * \brief initialize the keyschedule
	 *
	 * This function computes the keyschedule from a given key with a given length
	 * and stores it in the context variable
	 * \param key       pointer to the key material
	 * \param keysize_b length of the key in bits (valid are 128, 192 and 256)
	 * \param ctx       pointer to the context where the keyschedule should be stored
	 */
	void aes_init(const void* key, uint16_t keysize_b, aes_genctx_t* ctx);
	
	/**
	 * \brief initialize the keyschedule for 128 bit key
	 *
	 * This function computes the keyschedule from a given 128 bit key
	 * and stores it in the context variable
	 * \param key       pointer to the key material
	 * \param ctx       pointer to the context where the keyschedule should be stored
	 */
	void aes128_init(const void* key, aes128_ctx_t* ctx);
	
	/**
	 * \brief initialize the keyschedule for 192 bit key
	 *
	 * This function computes the keyschedule from a given 192 bit key
	 * and stores it in the context variable
	 * \param key       pointer to the key material
	 * \param ctx       pointer to the context where the keyschedule should be stored
	 */
	void aes192_init(const void* key, aes192_ctx_t* ctx);
	
	/**
	 * \brief initialize the keyschedule for 256 bit key
	 *
	 * This function computes the keyschedule from a given 256 bit key
	 * and stores it in the context variable
	 * \param key       pointer to the key material
	 * \param ctx       pointer to the context where the keyschedule should be stored
	 */
	void aes256_init(const void* key, aes256_ctx_t* ctx);
	
	#endif /* AES_KEYSCHEDULE_H_ */
	