des.h

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