des.h

00001 /**
00002  * /@code
00003  *
00004  * \file des.h
00005  *
00006  *  Based on XySSL: Copyright (C) 2006-2008  Christophe Devine
00007  *
00008  *  Copyright (C) 2009  Paul Bakker <polarssl_maintainer at polarssl dot org>
00009  *
00010  *  All rights reserved.
00011  *
00012  *  Redistribution and use in source and binary forms, with or without
00013  *  modification, are permitted provided that the following conditions
00014  *  are met:
00015  *  
00016  *    * Redistributions of source code must retain the above copyright
00017  *      notice, this list of conditions and the following disclaimer.
00018  *    * Redistributions in binary form must reproduce the above copyright
00019  *      notice, this list of conditions and the following disclaimer in the
00020  *      documentation and/or other materials provided with the distribution.
00021  *    * Neither the names of PolarSSL or XySSL nor the names of its contributors
00022  *      may be used to endorse or promote products derived from this software
00023  *      without specific prior written permission.
00024  *  
00025  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00026  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00027  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00028  *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
00029  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00030  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00031  *  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00032  *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00033  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00034  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00035  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00036  *
00037  * /@endcode
00038  *
00039  */
00040 
00041 #include "ppp_opts.h"
00042 #if PPP_INCLUDED_POLARSSL_DES
00043 
00044 #ifndef PPP_INCLUDED_POLARSSL_DES_H
00045 #define PPP_INCLUDED_POLARSSL_DES_H
00046 
00047 #define DES_ENCRYPT     1
00048 #define DES_DECRYPT     0
00049 
00050 /**
00051  * \brief          DES context structure
00052  */
00053 typedef struct
00054 {
00055     int mode ;                   /*!<  encrypt/decrypt   */
00056     unsigned long sk[32];       /*!<  DES subkeys       */
00057 }
00058 des_context;
00059 
00060 #ifdef __cplusplus
00061 extern "C" {
00062 #endif
00063 
00064 /**
00065  * \brief          DES key schedule (56-bit, encryption)
00066  *
00067  * \param ctx      DES context to be initialized
00068  * \param key      8-byte secret key
00069  */
00070 void des_setkey_enc( des_context *ctx, unsigned char key[8] );
00071 
00072 /**
00073  * \brief          DES key schedule (56-bit, decryption)
00074  *
00075  * \param ctx      DES context to be initialized
00076  * \param key      8-byte secret key
00077  */
00078 void des_setkey_dec( des_context *ctx, unsigned char key[8] );
00079 
00080 /**
00081  * \brief          DES-ECB block encryption/decryption
00082  *
00083  * \param ctx      DES context
00084  * \param input    64-bit input block
00085  * \param output   64-bit output block
00086  */
00087 void des_crypt_ecb( des_context *ctx,
00088                     const unsigned char input[8],
00089                     unsigned char output[8] );
00090 
00091 #ifdef __cplusplus
00092 }
00093 #endif
00094 
00095 #endif /* PPP_INCLUDED_POLARSSL_DES_H */
00096 
00097 #endif /* PPP_INCLUDED_POLARSSL_DES */