144 lines
2.8 KiB
C++
144 lines
2.8 KiB
C++
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#include "stdafx.h"
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#include "JSCode.h"
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JSCode::JSCode()
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{
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Init();
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}
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VOID JSCode::Init()
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{
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m_bAction = 0;
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m_encKey = 0;
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m_decKey = 0;
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m_Keys.Initialize( (DWORD)'J', 'S', 'C' );
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}
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VOID JSCode::EnCode(BYTE* IN OUT pSrc, DWORD uiSize, BYTE& crc )
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{
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if(!m_bAction) return;
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if( pSrc == NULL ) return;
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m_encKey = m_Keys.GetSolarSNKey( RandomSNKey::c_dwBaseKey );
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m_decKey = m_Keys.GetSolarSNKey( RandomSNKey::c_dwPairKey );
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m_Keys.NextRoundSNKey4Solar();
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//m_encKey++; m_decKey++;
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//BYTE local_key1 = m_encKey;
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//BYTE local_key2 = m_decKey;
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//BYTE local_key2_prev;
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//// EnCode와 CheckSum을 동시에 실행한다.
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//BYTE cCheckSum = 0;
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//for(int i=0; i < uiSize; i++)
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//{
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// local_key2_prev = local_key2;
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// local_key1 ^= pSrc[i];
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// local_key2 += pSrc[i];
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// pSrc[i] = local_key1 + local_key2_prev;
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// cCheckSum ^= pSrc[i];
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//}
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DWORD re = uiSize%sizeof(DWORD);
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DWORD* off = (DWORD*)pSrc;
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DWORD dwSize = (DWORD)(uiSize/sizeof(DWORD));
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DWORD local_key1
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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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DWORD local_key2 = ~local_key1;
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DWORD local_key2_prev;
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BYTE cCheckSum = 0;
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for( DWORD i=0 ; i<dwSize ; ++i )
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{
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local_key2_prev = local_key2;
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local_key1 ^= *off;
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local_key2 += *off;
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*off = local_key1 + local_key2_prev;
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cCheckSum ^= (*off)&0xFF;
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off++;
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}
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for( DWORD i=(uiSize-re) ; i<uiSize ; ++i )
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{
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pSrc[i] = pSrc[i]^m_decKey;
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cCheckSum ^= pSrc[i];
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}
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crc = cCheckSum^m_decKey;
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}
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BOOL JSCode::DeCode(BYTE* IN OUT pSrc, DWORD uiSize, BYTE& crc )
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{
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if(!m_bAction || !pSrc ) return FALSE;
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m_encKey = m_Keys.GetSolarSNKey( RandomSNKey::c_dwBaseKey );
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m_decKey = m_Keys.GetSolarSNKey( RandomSNKey::c_dwPairKey );
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m_Keys.NextRoundSNKey4Solar();
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//m_encKey++; m_decKey++;
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//BYTE local_key1 = m_encKey;
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//BYTE local_key2 = m_decKey;
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//// DeCode를 하기전에 ChekcSum을 구한다.
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//BYTE cCheckSum = 0;
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//for(int i=0; i < uiSize; i++)
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//{
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// cCheckSum ^= pSrc[i];
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// pSrc[i] = (pSrc[i] - local_key2) ^ local_key1;
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// local_key1 ^= pSrc[i];
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// local_key2 += pSrc[i];
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//}
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DWORD re = uiSize%sizeof(DWORD);
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DWORD* off = (DWORD*)pSrc;
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DWORD dwSize = (DWORD)(uiSize/sizeof(DWORD));
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DWORD local_key1
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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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DWORD local_key2 = ~local_key1;
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//DWORD local_key2_prev;
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BYTE cCheckSum = 0;
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crc = crc^m_decKey;
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for( DWORD i=(uiSize-re) ; i<uiSize ; ++i )
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{
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cCheckSum ^= pSrc[i];
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pSrc[i] = pSrc[i]^m_decKey;
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}
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for( DWORD i=0 ; i<dwSize ; ++i )
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{
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cCheckSum ^= (*off)&0xFF;
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*off = (*off - local_key2) ^ local_key1;
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local_key1 ^= *off;
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local_key2 += *off;
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off++;
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}
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if(crc == cCheckSum)
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return TRUE;
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else
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{
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//_tprintf("JSCode : [DeCode] CheckSum Error! \n");
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return FALSE;
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}
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}
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