md5.h

00001 /**
00002  * \file md5.h
00003  *
00004  * \brief MD5 message digest algorithm (hash function)
00005  *
00006  *  Copyright (C) 2006-2013, Brainspark B.V.
00007  *
00008  *  This file is part of PolarSSL (http://www.polarssl.org)
00009  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
00010  *
00011  *  All rights reserved.
00012  *
00013  *  This program is free software; you can redistribute it and/or modify
00014  *  it under the terms of the GNU General Public License as published by
00015  *  the Free Software Foundation; either version 2 of the License, or
00016  *  (at your option) any later version.
00017  *
00018  *  This program is distributed in the hope that it will be useful,
00019  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00020  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00021  *  GNU General Public License for more details.
00022  *
00023  *  You should have received a copy of the GNU General Public License along
00024  *  with this program; if not, write to the Free Software Foundation, Inc.,
00025  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
00026  */
00027 #ifndef POLARSSL_MD5_H
00028 #define POLARSSL_MD5_H
00029 
00030 #if !defined(POLARSSL_CONFIG_FILE)
00031 #include "config.h"
00032 #else
00033 #include POLARSSL_CONFIG_FILE
00034 #endif
00035 
00036 #include <string.h>
00037 
00038 #if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32)
00039 #include <basetsd.h>
00040 typedef UINT32 uint32_t;
00041 #else
00042 #include <inttypes.h>
00043 #endif
00044 
00045 #define POLARSSL_ERR_MD5_FILE_IO_ERROR                 -0x0074  /**< Read/write error in file. */
00046 
00047 #if !defined(POLARSSL_MD5_ALT)
00048 // Regular implementation
00049 //
00050 
00051 #ifdef __cplusplus
00052 extern "C" {
00053 #endif
00054 
00055 /**
00056  * \brief          MD5 context structure
00057  */
00058 typedef struct
00059 {
00060     uint32_t total[2];          /*!< number of bytes processed  */
00061     uint32_t state[4];          /*!< intermediate digest state  */
00062     unsigned char buffer[64];   /*!< data block being processed */
00063 
00064     unsigned char ipad[64];     /*!< HMAC: inner padding        */
00065     unsigned char opad[64];     /*!< HMAC: outer padding        */
00066 }
00067 md5_context;
00068 
00069 /**
00070  * \brief          MD5 context setup
00071  *
00072  * \param ctx      context to be initialized
00073  */
00074 void md5_starts( md5_context *ctx );
00075 
00076 /**
00077  * \brief          MD5 process buffer
00078  *
00079  * \param ctx      MD5 context
00080  * \param input    buffer holding the  data
00081  * \param ilen     length of the input data
00082  */
00083 void md5_update( md5_context *ctx, const unsigned char *input, size_t ilen );
00084 
00085 /**
00086  * \brief          MD5 final digest
00087  *
00088  * \param ctx      MD5 context
00089  * \param output   MD5 checksum result
00090  */
00091 void md5_finish( md5_context *ctx, unsigned char output[16] );
00092 
00093 /* Internal use */
00094 void md5_process( md5_context *ctx, const unsigned char data[64] );
00095 
00096 #ifdef __cplusplus
00097 }
00098 #endif
00099 
00100 #else  /* POLARSSL_MD5_ALT */
00101 #include "md5_alt.h"
00102 #endif /* POLARSSL_MD5_ALT */
00103 
00104 #ifdef __cplusplus
00105 extern "C" {
00106 #endif
00107 
00108 /**
00109  * \brief          Output = MD5( input buffer )
00110  *
00111  * \param input    buffer holding the  data
00112  * \param ilen     length of the input data
00113  * \param output   MD5 checksum result
00114  */
00115 void md5( const unsigned char *input, size_t ilen, unsigned char output[16] );
00116 
00117 /**
00118  * \brief          Output = MD5( file contents )
00119  *
00120  * \param path     input file name
00121  * \param output   MD5 checksum result
00122  *
00123  * \return         0 if successful, or POLARSSL_ERR_MD5_FILE_IO_ERROR
00124  */
00125 int md5_file( const char *path, unsigned char output[16] );
00126 
00127 /**
00128  * \brief          MD5 HMAC context setup
00129  *
00130  * \param ctx      HMAC context to be initialized
00131  * \param key      HMAC secret key
00132  * \param keylen   length of the HMAC key
00133  */
00134 void md5_hmac_starts( md5_context *ctx,
00135                       const unsigned char *key, size_t keylen );
00136 
00137 /**
00138  * \brief          MD5 HMAC process buffer
00139  *
00140  * \param ctx      HMAC context
00141  * \param input    buffer holding the  data
00142  * \param ilen     length of the input data
00143  */
00144 void md5_hmac_update( md5_context *ctx,
00145                       const unsigned char *input, size_t ilen );
00146 
00147 /**
00148  * \brief          MD5 HMAC final digest
00149  *
00150  * \param ctx      HMAC context
00151  * \param output   MD5 HMAC checksum result
00152  */
00153 void md5_hmac_finish( md5_context *ctx, unsigned char output[16] );
00154 
00155 /**
00156  * \brief          MD5 HMAC context reset
00157  *
00158  * \param ctx      HMAC context to be reset
00159  */
00160 void md5_hmac_reset( md5_context *ctx );
00161 
00162 /**
00163  * \brief          Output = HMAC-MD5( hmac key, input buffer )
00164  *
00165  * \param key      HMAC secret key
00166  * \param keylen   length of the HMAC key
00167  * \param input    buffer holding the  data
00168  * \param ilen     length of the input data
00169  * \param output   HMAC-MD5 result
00170  */
00171 void md5_hmac( const unsigned char *key, size_t keylen,
00172                const unsigned char *input, size_t ilen,
00173                unsigned char output[16] );
00174 
00175 /**
00176  * \brief          Checkup routine
00177  *
00178  * \return         0 if successful, or 1 if the test failed
00179  */
00180 int md5_self_test( int verbose );
00181 
00182 #ifdef __cplusplus
00183 }
00184 #endif
00185 
00186 #endif /* md5.h */
00187 
00188