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
   *         CCM* header file.
   * \author
   *         Konrad Krentz <konrad.krentz@gmail.com>
   */
  
  /**
   * \addtogroup llsec802154
   * @{
   */
  
  #ifndef CCM_STAR_H_
  #define CCM_STAR_H_
  
  #include <net/l2_buf.h>
  
  #include "contiki.h"
  #include "contiki/mac/frame802154.h"
  
  /* see RFC 3610 */
  #define CCM_STAR_AUTH_FLAGS(Adata, M) ((Adata ? (1 << 6) : 0) | (((M - 2) >> 1) << 3) | 1)
  #define CCM_STAR_ENCRYPTION_FLAGS     1
  
  #ifdef CCM_STAR_CONF
  #define CCM_STAR CCM_STAR_CONF
  #else /* CCM_STAR_CONF */
  #define CCM_STAR ccm_star_driver
  #endif /* CCM_STAR_CONF */
  
  /**
   * Structure of CCM* drivers.
   */
  struct ccm_star_driver {
    
     /**
      * \brief         Generates a MIC over the frame in the packetbuf.
      * \param result  The generated MIC will be put here
      * \param mic_len  <= 16; set to LLSEC802154_MIC_LENGTH to be compliant
      */
    void (* mic)(struct net_buf *buf, const uint8_t *extended_source_address,
        uint8_t *result,
        uint8_t mic_len);
    
    /**
     * \brief XORs the frame in the packetbuf with the key stream.
     */
    void (* ctr)(struct net_buf *buf, const uint8_t *extended_source_address);
  };
  
  extern const struct ccm_star_driver CCM_STAR;
  
  #endif /* CCM_STAR_H_ */
  
  /** @} */
  