text: /*
   * Copyright (c) 2013, Hasso-Plattner-Institut.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the Institute nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * This file is part of the Contiki operating system.
   *
   */
  
  /**
   * \file
   *         AES-128.
   * \author
   *         Konrad Krentz <konrad.krentz@gmail.com>
   */
  
  #ifndef AES_128_H_
  #define AES_128_H_
  
  #include "contiki.h"
  #include <stdbool.h>
  
  #define AES_128_BLOCK_SIZE 16
  #define AES_128_KEY_LENGTH 16
  
  #ifdef AES_128_CONF
  #define AES_128            AES_128_CONF
  #else /* AES_128_CONF */
  #define AES_128            aes_128_driver
  #endif /* AES_128_CONF */
  
  #ifndef AES_128_CONF_WITH_LOCKING
  #define AES_128_CONF_WITH_LOCKING 0
  #endif /* AES_128_CONF_WITH_LOCKING */
  
  /**
   * Structure of AES drivers.
   */
  struct aes_128_driver {
    
    /**
     * \brief Sets the current key.
     */
    void (* set_key)(const uint8_t *key);
    
    /**
     * \brief Encrypts.
     */
    void (* encrypt)(uint8_t *plaintext_and_result);
  
    /**
     * \brief Reserves exclusive access.
     */
    bool (* get_lock)(void);
  
    /**
     * \brief Unblocks access.
     */
    void (* release_lock)(void);
  };
  
  extern const struct aes_128_driver AES_128;
  
  bool aes_128_get_lock(void);
  void aes_128_release_lock(void);
  
  #endif /* AES_128_H_ */
  