mirror of
https://github.com/DarkflameUniverse/DarkflameServer.git
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327 lines
6.6 KiB
C++
327 lines
6.6 KiB
C++
/**
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* @brief SHA-1 Hash key computation
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*
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* 100% free public domain implementation of the SHA-1
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* algorithm by Dominik Reichl <Dominik.Reichl@tiscali.de>
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*
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*
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* === Test Vectors (from FIPS PUB 180-1) ===
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*
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* "abc"
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* A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
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*
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* "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
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* 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
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*
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* A million repetitions of "a"
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* 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
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*/
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#include "SHA1.h"
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#include <stdlib.h>
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CSHA1::CSHA1()
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{
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Reset();
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}
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CSHA1::~CSHA1()
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{
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Reset();
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}
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void CSHA1::Reset()
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{
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// SHA1 initialization constants
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m_state[ 0 ] = 0x67452301;
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m_state[ 1 ] = 0xEFCDAB89;
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m_state[ 2 ] = 0x98BADCFE;
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m_state[ 3 ] = 0x10325476;
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m_state[ 4 ] = 0xC3D2E1F0;
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m_count[ 0 ] = 0;
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m_count[ 1 ] = 0;
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}
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void CSHA1::Transform( unsigned int state[ 5 ], unsigned char buffer[ 64 ] )
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{
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unsigned int a = 0, b = 0, c = 0, d = 0, e = 0;
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SHA1_WORKSPACE_BLOCK* block;
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// static unsigned char workspace[64];
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block = ( SHA1_WORKSPACE_BLOCK * ) workspace;
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memcpy( block, buffer, 64 );
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// Copy state[] to working vars
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a = state[ 0 ];
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b = state[ 1 ];
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c = state[ 2 ];
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d = state[ 3 ];
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e = state[ 4 ];
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// 4 rounds of 20 operations each. Loop unrolled.
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R0( a, b, c, d, e, 0 );
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R0( e, a, b, c, d, 1 );
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R0( d, e, a, b, c, 2 );
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R0( c, d, e, a, b, 3 );
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R0( b, c, d, e, a, 4 );
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R0( a, b, c, d, e, 5 );
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R0( e, a, b, c, d, 6 );
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R0( d, e, a, b, c, 7 );
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R0( c, d, e, a, b, 8 );
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R0( b, c, d, e, a, 9 );
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R0( a, b, c, d, e, 10 );
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R0( e, a, b, c, d, 11 );
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R0( d, e, a, b, c, 12 );
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R0( c, d, e, a, b, 13 );
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R0( b, c, d, e, a, 14 );
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R0( a, b, c, d, e, 15 );
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R1( e, a, b, c, d, 16 );
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R1( d, e, a, b, c, 17 );
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R1( c, d, e, a, b, 18 );
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R1( b, c, d, e, a, 19 );
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R2( a, b, c, d, e, 20 );
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R2( e, a, b, c, d, 21 );
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R2( d, e, a, b, c, 22 );
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R2( c, d, e, a, b, 23 );
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R2( b, c, d, e, a, 24 );
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R2( a, b, c, d, e, 25 );
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R2( e, a, b, c, d, 26 );
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R2( d, e, a, b, c, 27 );
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R2( c, d, e, a, b, 28 );
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R2( b, c, d, e, a, 29 );
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R2( a, b, c, d, e, 30 );
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R2( e, a, b, c, d, 31 );
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R2( d, e, a, b, c, 32 );
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R2( c, d, e, a, b, 33 );
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R2( b, c, d, e, a, 34 );
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R2( a, b, c, d, e, 35 );
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R2( e, a, b, c, d, 36 );
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R2( d, e, a, b, c, 37 );
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R2( c, d, e, a, b, 38 );
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R2( b, c, d, e, a, 39 );
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R3( a, b, c, d, e, 40 );
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R3( e, a, b, c, d, 41 );
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R3( d, e, a, b, c, 42 );
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R3( c, d, e, a, b, 43 );
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R3( b, c, d, e, a, 44 );
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R3( a, b, c, d, e, 45 );
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R3( e, a, b, c, d, 46 );
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R3( d, e, a, b, c, 47 );
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R3( c, d, e, a, b, 48 );
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R3( b, c, d, e, a, 49 );
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R3( a, b, c, d, e, 50 );
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R3( e, a, b, c, d, 51 );
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R3( d, e, a, b, c, 52 );
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R3( c, d, e, a, b, 53 );
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R3( b, c, d, e, a, 54 );
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R3( a, b, c, d, e, 55 );
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R3( e, a, b, c, d, 56 );
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R3( d, e, a, b, c, 57 );
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R3( c, d, e, a, b, 58 );
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R3( b, c, d, e, a, 59 );
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R4( a, b, c, d, e, 60 );
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R4( e, a, b, c, d, 61 );
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R4( d, e, a, b, c, 62 );
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R4( c, d, e, a, b, 63 );
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R4( b, c, d, e, a, 64 );
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R4( a, b, c, d, e, 65 );
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R4( e, a, b, c, d, 66 );
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R4( d, e, a, b, c, 67 );
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R4( c, d, e, a, b, 68 );
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R4( b, c, d, e, a, 69 );
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R4( a, b, c, d, e, 70 );
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R4( e, a, b, c, d, 71 );
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R4( d, e, a, b, c, 72 );
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R4( c, d, e, a, b, 73 );
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R4( b, c, d, e, a, 74 );
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R4( a, b, c, d, e, 75 );
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R4( e, a, b, c, d, 76 );
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R4( d, e, a, b, c, 77 );
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R4( c, d, e, a, b, 78 );
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R4( b, c, d, e, a, 79 );
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// Add the working vars back into state[]
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state[ 0 ] += a;
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state[ 1 ] += b;
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state[ 2 ] += c;
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state[ 3 ] += d;
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state[ 4 ] += e;
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// Wipe variables
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a = 0;
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b = 0;
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c = 0;
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d = 0;
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e = 0;
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}
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// Use this function to hash in binary data and strings
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void CSHA1::Update( unsigned char* data, unsigned int len )
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{
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unsigned int i = 0, j = 0;
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j = ( m_count[ 0 ] >> 3 ) & 63;
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if ( ( m_count[ 0 ] += len << 3 ) < ( len << 3 ) )
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m_count[ 1 ] ++;
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m_count[ 1 ] += ( len >> 29 );
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if ( ( j + len ) > 63 )
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{
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memcpy( &m_buffer[ j ], data, ( i = 64 - j ) );
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Transform( m_state, m_buffer );
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for ( ; i + 63 < len; i += 64 )
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{
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Transform( m_state, &data[ i ] );
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}
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j = 0;
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}
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else
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i = 0;
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memcpy( &m_buffer[ j ], &data[ i ], len - i );
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}
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// Hash in file contents
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bool CSHA1::HashFile( char *szFileName )
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{
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unsigned long ulFileSize = 0, ulRest = 0, ulBlocks = 0;
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unsigned long i = 0;
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unsigned char uData[ MAX_FILE_READ_BUFFER ];
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FILE *fIn = NULL;
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if ( ( fIn = fopen( szFileName, "rb" ) ) == NULL )
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return ( false );
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fseek( fIn, 0, SEEK_END );
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ulFileSize = ftell( fIn );
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fseek( fIn, 0, SEEK_SET );
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// This is faster
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div_t temp;
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temp = div( ulFileSize, MAX_FILE_READ_BUFFER );
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ulRest = temp.rem;
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ulBlocks = temp.quot;
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// ulRest = ulFileSize % MAX_FILE_READ_BUFFER;
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// ulBlocks = ulFileSize / MAX_FILE_READ_BUFFER;
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for ( i = 0; i < ulBlocks; i++ )
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{
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fread( uData, 1, MAX_FILE_READ_BUFFER, fIn );
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Update( uData, MAX_FILE_READ_BUFFER );
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}
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if ( ulRest != 0 )
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{
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fread( uData, 1, ulRest, fIn );
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Update( uData, ulRest );
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}
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fclose( fIn );
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fIn = NULL;
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return ( true );
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}
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void CSHA1::Final()
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{
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unsigned int i = 0, j = 0;
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unsigned char finalcount[ 8 ] =
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{
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0, 0, 0, 0, 0, 0, 0, 0
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};
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for ( i = 0; i < 8; i++ )
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finalcount[ i ] = (unsigned char) ( ( m_count[ ( i >= 4 ? 0 : 1 ) ]
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>> ( ( 3 - ( i & 3 ) ) * 8 ) ) & 255 ); // Endian independent
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Update( ( unsigned char * ) "\200", 1 );
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while ( ( m_count[ 0 ] & 504 ) != 448 )
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Update( ( unsigned char * ) "\0", 1 );
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Update( finalcount, 8 ); // Cause a SHA1Transform()
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for ( i = 0; i < 20; i++ )
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{
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m_digest[ i ] = (unsigned char) ( ( m_state[ i >> 2 ] >> ( ( 3 - ( i & 3 ) ) * 8 ) ) & 255 );
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}
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// Wipe variables for security reasons
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i = 0;
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j = 0;
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memset( m_buffer, 0, 64 );
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memset( m_state, 0, 20 );
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memset( m_count, 0, 8 );
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memset( finalcount, 0, 8 );
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Transform( m_state, m_buffer );
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}
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// Get the final hash as a pre-formatted string
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void CSHA1::ReportHash( char *szReport, unsigned char uReportType )
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{
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unsigned char i = 0;
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char szTemp[ 4 ];
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if ( uReportType == REPORT_HEX )
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{
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sprintf( szTemp, "%02X", m_digest[ 0 ] );
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strcat( szReport, szTemp );
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for ( i = 1; i < 20; i++ )
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{
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sprintf( szTemp, " %02X", m_digest[ i ] );
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strcat( szReport, szTemp );
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}
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}
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else
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if ( uReportType == REPORT_DIGIT )
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{
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sprintf( szTemp, "%u", m_digest[ 0 ] );
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strcat( szReport, szTemp );
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for ( i = 1; i < 20; i++ )
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{
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sprintf( szTemp, " %u", m_digest[ i ] );
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strcat( szReport, szTemp );
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}
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}
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else
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strcpy( szReport, "Error: Unknown report type!" );
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}
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// Get the raw message digest
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void CSHA1::GetHash( unsigned char *uDest )
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{
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memcpy( uDest, m_digest, 20 );
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}
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// Get the raw message digest
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// Added by Kevin to be quicker
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unsigned char * CSHA1::GetHash( void ) const
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{
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return ( unsigned char * ) m_digest;
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}
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