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sha1.h

00001 /* 
00002  * \file sha1.h
00003  *
00004  *  Copyright (C) 2006-2010, Paul Bakker <polarssl_maintainer at polarssl.org>
00005  *  All rights reserved.
00006  *
00007  *  This program is free software; you can redistribute it and/or modify
00008  *  it under the terms of the GNU General Public License as published by
00009  *  the Free Software Foundation; either version 2 of the License, or
00010  *  (at your option) any later version.
00011  *
00012  *  This program is distributed in the hope that it will be useful,
00013  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  *  GNU General Public License for more details.
00016  *
00017  *  You should have received a copy of the GNU General Public License along
00018  *  with this program; if not, write to the Free Software Foundation, Inc.,
00019  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
00020  */
00021 #ifndef POLARSSL_SHA1_H
00022 #define POLARSSL_SHA1_H
00023 
00024 /* 
00025  * \brief          SHA-1 context structure
00026  */
00027 typedef struct
00028 {
00029     unsigned long total[2];     /*!< number of bytes processed  */
00030     unsigned long state[5];     /*!< intermediate digest state  */
00031     unsigned char buffer[64];   /*!< data block being processed */
00032 
00033     unsigned char ipad[64];     /*!< HMAC: inner padding        */
00034     unsigned char opad[64];     /*!< HMAC: outer padding        */
00035 }
00036 sha1_context;
00037 
00038 #ifdef __cplusplus
00039 extern "C" {
00040 #endif
00041 
00042 /* 
00043  * \brief          SHA-1 context setup
00044  *
00045  * \param ctx      context to be initialized
00046  */
00047 void sha1_starts( sha1_context *ctx );
00048 
00049 /* 
00050  * \brief          SHA-1 process buffer
00051  *
00052  * \param ctx      SHA-1 context
00053  * \param input    buffer holding the  data
00054  * \param ilen     length of the input data
00055  */
00056 void sha1_update( sha1_context *ctx, const unsigned char *input, int ilen );
00057 
00058 /* 
00059  * \brief          SHA-1 final digest
00060  *
00061  * \param ctx      SHA-1 context
00062  * \param output   SHA-1 checksum result
00063  */
00064 void sha1_finish( sha1_context *ctx, unsigned char output[20] );
00065 
00066 /* 
00067  * \brief          Output = SHA-1( input buffer )
00068  *
00069  * \param input    buffer holding the  data
00070  * \param ilen     length of the input data
00071  * \param output   SHA-1 checksum result
00072  */
00073 void sha1( const unsigned char *input, int ilen, unsigned char output[20] );
00074 
00075 #if 0 //No need for that
00076 /* 
00077  * \brief          Output = SHA-1( file contents )
00078  *
00079  * \param path     input file name
00080  * \param output   SHA-1 checksum result
00081  *
00082  * \return         0 if successful, 1 if fopen failed,
00083  *                 or 2 if fread failed
00084  */
00085 int sha1_file( const char *path, unsigned char output[20] );
00086 #endif
00087 
00088 /* 
00089  * \brief          SHA-1 HMAC context setup
00090  *
00091  * \param ctx      HMAC context to be initialized
00092  * \param key      HMAC secret key
00093  * \param keylen   length of the HMAC key
00094  */
00095 void sha1_hmac_starts( sha1_context *ctx, const unsigned char *key, int keylen );
00096 
00097 /* 
00098  * \brief          SHA-1 HMAC process buffer
00099  *
00100  * \param ctx      HMAC context
00101  * \param input    buffer holding the  data
00102  * \param ilen     length of the input data
00103  */
00104 void sha1_hmac_update( sha1_context *ctx, const unsigned char *input, int ilen );
00105 
00106 /* 
00107  * \brief          SHA-1 HMAC final digest
00108  *
00109  * \param ctx      HMAC context
00110  * \param output   SHA-1 HMAC checksum result
00111  */
00112 void sha1_hmac_finish( sha1_context *ctx, unsigned char output[20] );
00113 
00114 /* 
00115  * \brief          SHA-1 HMAC context reset
00116  *
00117  * \param ctx      HMAC context to be reset
00118  */
00119 void sha1_hmac_reset( sha1_context *ctx );
00120 
00121 /* 
00122  * \brief          Output = HMAC-SHA-1( hmac key, input buffer )
00123  *
00124  * \param key      HMAC secret key
00125  * \param keylen   length of the HMAC key
00126  * \param input    buffer holding the  data
00127  * \param ilen     length of the input data
00128  * \param output   HMAC-SHA-1 result
00129  */
00130 void sha1_hmac( const unsigned char *key, int keylen,
00131                 const unsigned char *input, int ilen,
00132                 unsigned char output[20] );
00133 
00134 /* 
00135  * \brief          Checkup routine
00136  *
00137  * \return         0 if successful, or 1 if the test failed
00138  */
00139 int sha1_self_test( int verbose );
00140 
00141 #ifdef __cplusplus
00142 }
00143 #endif
00144 
00145 #endif /* sha1.h */