170 lines
3.8 KiB
C++
170 lines
3.8 KiB
C++
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#include "stdafx.h"
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#include "BitOperation.h"
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BitOp::BitOp()
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{
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m_bInited = FALSE;
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m_encKey = 0;
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m_decKey = 0;
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m_encKey = 0;
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m_decKey = 0;
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m_Keys.Initialize( (DWORD)'b', 'i', 't' );
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}
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inline DWORD BitOp::ConvertDWORD( DWORD src, DWORD mask )
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{
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if( MASK::c_WORD & mask )
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src = (src<<16) | (src>>16);
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if( MASK::c_BYTE & mask )
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src = ((src<<8)&0xFF00FF00) | ((src>>8)&0x00FF00FF);
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if( MASK::c_4BIT & mask )
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src = ((src<<4)&0xF0F0F0F0) | ((src>>4)&0x0F0F0F0F);
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if( MASK::c_2BIT & mask )
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src = ((src<<2)&0xCCCCCCCC) | ((src>>2)&0x33333333);
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if( MASK::c_1BIT & mask )
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src = ((src<<1)&0xAAAAAAAA) | ((src>>1)&0x55555555);
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return src;
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}
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inline WORD BitOp::ConvertWORD( WORD src, DWORD mask )
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{
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if( MASK::c_BYTE & mask )
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src = ((src<<8)&0xFF00FF00) | ((src>>8)&0x00FF00FF);
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if( MASK::c_4BIT & mask )
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src = ((src<<4)&0xF0F0F0F0) | ((src>>4)&0x0F0F0F0F);
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if( MASK::c_2BIT & mask )
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src = ((src<<2)&0xCCCCCCCC) | ((src>>2)&0x33333333);
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if( MASK::c_1BIT & mask )
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src = ((src<<1)&0xAAAAAAAA) | ((src>>1)&0x55555555);
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return src;
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}
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inline BYTE BitOp::ConvertBYTE( BYTE src, DWORD mask )
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{
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if( MASK::c_4BIT & mask )
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src = ((src<<4)&0xF0F0F0F0) | ((src>>4)&0x0F0F0F0F);
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if( MASK::c_2BIT & mask )
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src = ((src<<2)&0xCCCCCCCC) | ((src>>2)&0x33333333);
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if( MASK::c_1BIT & mask )
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src = ((src<<1)&0xAAAAAAAA) | ((src>>1)&0x55555555);
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return src;
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}
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union U42 {
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DWORD* pDW;
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WORD* pW;
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BYTE* pB;
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};
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void BitOp::EnCode(BYTE* IN OUT pSrc, DWORD uiSize, BYTE& crc )
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{
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m_encKey = m_Keys.GetSolarSNKey( RandomSNKey::SNKEY_BASE );
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m_decKey = m_Keys.GetSolarSNKey( RandomSNKey::SNKEY_PAIR );
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m_Keys.NextRoundSNKey4Solar();
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DWORD re = uiSize%sizeof(DWORD);
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BYTE checkSum = 0;
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U42 off;
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DWORD dwTempKey
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= ((DWORD)m_encKey << 24)
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| ((DWORD)m_encKey^(DWORD)m_decKey)<<16
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| ((DWORD)m_decKey<<8)
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| (DWORD)m_encKey|(DWORD)m_decKey;
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off.pB = pSrc;
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DWORD dwSize = (DWORD)(uiSize/sizeof(DWORD));
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#if CODE_TEST(__MOLA_CLIENT_DEBUGGING_BITTEST__)
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_tprintf( "DWORD size %d : remain %d\n", dwSize, re );
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#endif
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for( DWORD i=0 ; i<dwSize ; ++i )
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{
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#if CODE_TEST(__MOLA_CLIENT_DEBUGGING_BITTEST__)
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_tprintf( "[%08X]", off.pDW );
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#endif
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*off.pDW ^= dwTempKey;
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*off.pDW = ConvertDWORD( *off.pDW, MASK::c_ALL );
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*off.pDW ^= dwTempKey;
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checkSum ^= *off.pB;
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++off.pDW;
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}
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#if CODE_TEST(__MOLA_CLIENT_DEBUGGING_BITTEST__)
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_tprintf( "\nLAST [%08X]\n", off.pDW );
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#endif
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for( DWORD i=(uiSize-re) ; i<uiSize ; ++i )
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{
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#if CODE_TEST(__MOLA_CLIENT_DEBUGGING_BITTEST__)
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//off.pB[i] = off.pB[i]^m_decKey;
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_tprintf( "[%08X]", off.pB );
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#endif
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*off.pB = ConvertBYTE( *off.pB, MASK::c_BYTE );
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checkSum ^= *off.pB;
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++off.pB;
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}
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crc = checkSum;
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}
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BOOL BitOp::DeCode(BYTE* IN OUT pSrc, DWORD uiSize, BYTE& crc )
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{
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m_encKey = m_Keys.GetSolarSNKey( RandomSNKey::SNKEY_BASE );
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m_decKey = m_Keys.GetSolarSNKey( RandomSNKey::SNKEY_PAIR );
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m_Keys.NextRoundSNKey4Solar();
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DWORD re = uiSize%sizeof(DWORD);
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U42 off;
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BYTE checkSum = 0;
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DWORD dwSize = (DWORD)(uiSize/sizeof(DWORD));
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off.pB = pSrc;
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DWORD dwTempKey
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= ((DWORD)m_encKey << 24)
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| ((DWORD)m_encKey^(DWORD)m_decKey)<<16
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| ((DWORD)m_decKey<<8)
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| (DWORD)m_encKey|(DWORD)m_decKey;
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#if CODE_TEST(__MOLA_CLIENT_DEBUGGING_BITTEST__)
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_tprintf( "\n\nDECODE\n" );
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#endif
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for( DWORD i=(uiSize-re) ; i<uiSize ; ++i )
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{
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checkSum ^= off.pB[i];
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off.pB[i] = ConvertBYTE( off.pB[i], MASK::c_BYTE );
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//--off.pB;
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}
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//--off.pDW;
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for( DWORD i=0 ; i<dwSize ; ++i )
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{
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checkSum ^= (*off.pB);
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#if CODE_TEST(__MOLA_CLIENT_DEBUGGING_BITTEST__)
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_tprintf( "[%08X]", off.pDW );
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#endif
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*off.pDW ^= dwTempKey;
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*off.pDW = ConvertDWORD( *off.pDW, MASK::c_ALL );
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*off.pDW ^= dwTempKey;
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++off.pDW;
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}
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#if CODE_TEST(__MOLA_CLIENT_DEBUGGING_BITTEST__)
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_tprintf( "\nLAST [%08X]\n", off.pDW );
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#endif
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if(crc == checkSum)
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return TRUE;
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else
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{
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return FALSE;
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}
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}
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