src/src/pdkim/sha1.h

   1 /**
   2  * \file sha1.h
   3  *
   4  *  Copyright (C) 2006-2010, Brainspark B.V.
   5  *
   6  *  This file is part of PolarSSL (http://www.polarssl.org)
   7  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
   8  *
   9  *  All rights reserved.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with this program; if not, write to the Free Software Foundation, Inc.,
  23  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 /* $Cambridge: exim/src/src/pdkim/sha1.h,v 1.3 2009/12/07 13:05:07 tom Exp $ */
  27
  28 #ifndef POLARSSL_SHA1_H
  29 #define POLARSSL_SHA1_H
  30
  31 /**
  32  * \brief          SHA-1 context structure
  33  */
  34 #ifndef HAVE_SHA1_CONTEXT
  35 #define HAVE_SHA1_CONTEXT
  36 typedef struct sha1_context sha1_context;
  37 #endif
  38
  39 struct sha1_context
  40 {
  41     unsigned long total[2];     /*!< number of bytes processed  */
  42     unsigned long state[5];     /*!< intermediate digest state  */
  43     unsigned char buffer[64];   /*!< data block being processed */
  44
  45     unsigned char ipad[64];     /*!< HMAC: inner padding        */
  46     unsigned char opad[64];     /*!< HMAC: outer padding        */
  47 };
  48
  49 #ifdef __cplusplus
  50 extern "C" {
  51 #endif
  52
  53 /**
  54  * \brief          SHA-1 context setup
  55  *
  56  * \param ctx      context to be initialized
  57  */
  58 void sha1_starts( sha1_context *ctx );
  59
  60 /**
  61  * \brief          SHA-1 process buffer
  62  *
  63  * \param ctx      SHA-1 context
  64  * \param input    buffer holding the  data
  65  * \param ilen     length of the input data
  66  */
  67 void sha1_update( sha1_context *ctx, const unsigned char *input, int ilen );
  68
  69 /**
  70  * \brief          SHA-1 final digest
  71  *
  72  * \param ctx      SHA-1 context
  73  * \param output   SHA-1 checksum result
  74  */
  75 void sha1_finish( sha1_context *ctx, unsigned char output[20] );
  76
  77 /**
  78  * \brief          Output = SHA-1( input buffer )
  79  *
  80  * \param input    buffer holding the  data
  81  * \param ilen     length of the input data
  82  * \param output   SHA-1 checksum result
  83  */
  84 void sha1( const unsigned char *input, int ilen, unsigned char output[20] );
  85
  86 /**
  87  * \brief          Output = SHA-1( file contents )
  88  *
  89  * \param path     input file name
  90  * \param output   SHA-1 checksum result
  91  *
  92  * \return         0 if successful, 1 if fopen failed,
  93  *                 or 2 if fread failed
  94  */
  95 int sha1_file( const char *path, unsigned char output[20] );
  96
  97 /**
  98  * \brief          SHA-1 HMAC context setup
  99  *
 100  * \param ctx      HMAC context to be initialized
 101  * \param key      HMAC secret key
 102  * \param keylen   length of the HMAC key
 103  */
 104 void sha1_hmac_starts( sha1_context *ctx, const unsigned char *key, int keylen );
 105
 106 /**
 107  * \brief          SHA-1 HMAC process buffer
 108  *
 109  * \param ctx      HMAC context
 110  * \param input    buffer holding the  data
 111  * \param ilen     length of the input data
 112  */
 113 void sha1_hmac_update( sha1_context *ctx, const unsigned char *input, int ilen );
 114
 115 /**
 116  * \brief          SHA-1 HMAC final digest
 117  *
 118  * \param ctx      HMAC context
 119  * \param output   SHA-1 HMAC checksum result
 120  */
 121 void sha1_hmac_finish( sha1_context *ctx, unsigned char output[20] );
 122
 123 /**
 124  * \brief          SHA-1 HMAC context reset
 125  *
 126  * \param ctx      HMAC context to be reset
 127  */
 128 void sha1_hmac_reset( sha1_context *ctx );
 129
 130 /**
 131  * \brief          Output = HMAC-SHA-1( hmac key, input buffer )
 132  *
 133  * \param key      HMAC secret key
 134  * \param keylen   length of the HMAC key
 135  * \param input    buffer holding the  data
 136  * \param ilen     length of the input data
 137  * \param output   HMAC-SHA-1 result
 138  */
 139 void sha1_hmac( const unsigned char *key, int keylen,
 140                 const unsigned char *input, int ilen,
 141                 unsigned char output[20] );
 142
 143 #ifdef __cplusplus
 144 }
 145 #endif
 146
 147 #endif /* sha1.h */