text: /**
   * /@code
   *
   * \file md4.h
   *
   *  Based on XySSL: Copyright (C) 2006-2008  Christophe Devine
   *
   *  Copyright (C) 2009  Paul Bakker <polarssl_maintainer at polarssl dot org>
   *
   *  All rights reserved.
   *
   *  Redistribution and use in source and binary forms, with or without
   *  modification, are permitted provided that the following conditions
   *  are met:
   *  
   *    * Redistributions of source code must retain the above copyright
   *      notice, this list of conditions and the following disclaimer.
   *    * 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.
   *    * Neither the names of PolarSSL or XySSL 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 COPYRIGHT HOLDERS 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 COPYRIGHT
   *  OWNER 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.
   *
   * /@endcode
   */
  
  #include "ppp_opts.h"
  #if PPP_INCLUDED_POLARSSL_MD4
  
  #ifndef PPP_INCLUDED_POLARSSL_MD4_H
  #define PPP_INCLUDED_POLARSSL_MD4_H
  
  /**
   * \brief          MD4 context structure
   */
  typedef struct
  {
      unsigned long total[2];     /*!< number of bytes processed  */
      unsigned long state[4];     /*!< intermediate digest state  */
      unsigned char buffer[64];   /*!< data block being processed */
  }
  md4_context;
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /**
   * \brief          MD4 context setup
   *
   * \param ctx      context to be initialized
   */
  void md4_starts( md4_context *ctx );
  
  /**
   * \brief          MD4 process buffer
   *
   * \param ctx      MD4 context
   * \param input    buffer holding the  data
   * \param ilen     length of the input data
   */
  void md4_update( md4_context *ctx, const unsigned char *input, int ilen );
  
  /**
   * \brief          MD4 final digest
   *
   * \param ctx      MD4 context
   * \param output   MD4 checksum result
   */
  void md4_finish( md4_context *ctx, unsigned char output[16] );
  
  /**
   * \brief          Output = MD4( input buffer )
   *
   * \param input    buffer holding the  data
   * \param ilen     length of the input data
   * \param output   MD4 checksum result
   */
  void md4( unsigned char *input, int ilen, unsigned char output[16] );
  
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* PPP_INCLUDED_POLARSSL_MD4_H */
  
  #endif /* PPP_INCLUDED_POLARSSL_MD4 */
  