1 /** 2 * \file des.h 3 * 4 * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine 5 * 6 * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org> 7 * 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * * Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * * Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * * Neither the names of PolarSSL or XySSL nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 26 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include "netif/ppp/ppp_opts.h" 37 #if LWIP_INCLUDED_POLARSSL_DES 38 39 #ifndef LWIP_INCLUDED_POLARSSL_DES_H 40 #define LWIP_INCLUDED_POLARSSL_DES_H 41 42 #define DES_ENCRYPT 1 43 #define DES_DECRYPT 0 44 45 /** 46 * \brief DES context structure 47 */ 48 typedef struct 49 { 50 int mode; /*!< encrypt/decrypt */ 51 unsigned long sk[32]; /*!< DES subkeys */ 52 } 53 des_context; 54 55 #ifdef __cplusplus 56 extern "C" { 57 #endif 58 59 /** 60 * \brief DES key schedule (56-bit, encryption) 61 * 62 * \param ctx DES context to be initialized 63 * \param key 8-byte secret key 64 */ 65 void des_setkey_enc( des_context *ctx, unsigned char key[8] ); 66 67 /** 68 * \brief DES key schedule (56-bit, decryption) 69 * 70 * \param ctx DES context to be initialized 71 * \param key 8-byte secret key 72 */ 73 void des_setkey_dec( des_context *ctx, unsigned char key[8] ); 74 75 /** 76 * \brief DES-ECB block encryption/decryption 77 * 78 * \param ctx DES context 79 * \param input 64-bit input block 80 * \param output 64-bit output block 81 */ 82 void des_crypt_ecb( des_context *ctx, 83 const unsigned char input[8], 84 unsigned char output[8] ); 85 86 #ifdef __cplusplus 87 } 88 #endif 89 90 #endif /* LWIP_INCLUDED_POLARSSL_DES_H */ 91 92 #endif /* LWIP_INCLUDED_POLARSSL_DES */ 93