LosaDev source snapshot 2019

extra/LS_Service/LS_launcher/cEncrypt.cpp

@@ -0,0 +1,183 @@
+#include "stdafx.h"
+#include "cEncrypt.h"
+
+// cEncrypt
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+cEncrypt::cEncrypt() : m_nArrayLen(4028)
+{
+	m_pArrayBuffer = new uint8[m_nArrayLen];
+}
+
+cEncrypt::~cEncrypt()
+{
+	if(m_pArrayBuffer)
+	{
+		delete []m_pArrayBuffer;
+		m_pArrayBuffer = NULL;
+	}
+}
+
+uint32  cEncrypt::Compress(const uint8 *lpSource, uint32 nSourceLen, uint8 *lpDestination)
+{
+	uint32 nIndex = 0;
+	uint32 nZeroCount = 0;
+	uint32 nZeroBit = 0;
+	uint32 nBitArrayCount = 0;
+	uint32 nUsedBytes = 0;
+	uint8  bBit  = 0;
+
+	ZeroMemory(m_pArrayBuffer, m_nArrayLen);
+
+	for(uint32 i = 0; i < nSourceLen; ++i)
+	{
+		if(0 == lpSource[i])
+		{
+			++nZeroCount;
+			nZeroBit		= i % 8;
+			nBitArrayCount	= i >> 3;
+			bBit			= 1;
+			bBit			= bBit << nZeroBit;
+
+			m_pArrayBuffer[nBitArrayCount] = m_pArrayBuffer[nBitArrayCount] | bBit;
+			if(nUsedBytes < nBitArrayCount) nUsedBytes = nBitArrayCount;
+		}
+		else
+		{
+			// 1바이트씩 복사
+			lpDestination[nIndex++] = lpSource[i];
+		}
+	}
+
+	if(nZeroCount > 0) ++nUsedBytes;
+
+	memmove(lpDestination+sizeof(uint16)+nUsedBytes, lpDestination, nSourceLen-nZeroCount);
+	CopyMemory(lpDestination, &nUsedBytes, sizeof(uint16));		// + 널값정보에 이용되는 버퍼 길이 2Byte
+	CopyMemory(lpDestination+sizeof(uint16), m_pArrayBuffer, nUsedBytes);
+
+	return (sizeof(uint16) + nUsedBytes + nSourceLen - nZeroCount);
+}
+
+uint32  cEncrypt::Decompress(const uint8 *lpSource, uint32 nSourceLen, uint8 *lpDestination)
+{
+	uint16 nBitArrayCount = 0;
+	uint32 nOriginalLen = 0;
+	uint32 nBufferCount = 0;
+	charBit *pTempByte;
+	
+	CopyMemory(&nBitArrayCount, lpSource, sizeof(unsigned short));
+	nOriginalLen	= nSourceLen-sizeof(uint16);
+	nBufferCount	= nOriginalLen = nOriginalLen - nBitArrayCount;
+
+	ZeroMemory(m_pArrayBuffer, m_nArrayLen);
+	CopyMemory(m_pArrayBuffer, lpSource+sizeof(uint16), nBitArrayCount);
+	
+	const uint8* lpData = (lpSource + sizeof(uint16) + nBitArrayCount);
+
+	uint32 nSource = 0, nDestination = 0;
+	for(uint32 i=0; i < nBitArrayCount; ++i)
+	{
+		pTempByte = reinterpret_cast<charBit*>(&m_pArrayBuffer[i]);
+
+		if(pTempByte->v1==0)
+		{
+			if(nSource < nBufferCount)		
+				lpDestination[nDestination++] = lpData[nSource++];
+		}
+		else
+		{
+			lpDestination[nDestination++] = 0;
+			++nOriginalLen;
+		}
+
+		if(pTempByte->v2==0)
+		{
+			if(nSource < nBufferCount)		
+				lpDestination[nDestination++] = lpData[nSource++];
+		}
+		else
+		{
+			lpDestination[nDestination++] = 0;
+			++nOriginalLen;
+		}
+
+		if(pTempByte->v3==0)
+		{
+			if(nSource < nBufferCount)		
+				lpDestination[nDestination++] = lpData[nSource++];
+		}
+		else
+		{
+			lpDestination[nDestination++] = 0;
+			++nOriginalLen;
+		}
+
+		if(pTempByte->v4==0)
+		{
+			if(nSource < nBufferCount)		
+				lpDestination[nDestination++] = lpData[nSource++];
+		}
+		else
+		{
+			lpDestination[nDestination++] = 0;
+			++nOriginalLen;
+		}
+
+		if(pTempByte->v5==0)
+		{
+			if(nSource < nBufferCount)		
+				lpDestination[nDestination++] = lpData[nSource++];
+		}
+		else
+		{
+			lpDestination[nDestination++] = 0;
+			++nOriginalLen;
+		}
+
+		if(pTempByte->v6==0)
+		{
+			if(nSource < nBufferCount)		
+				lpDestination[nDestination++] = lpData[nSource++];
+		}
+		else
+		{
+			lpDestination[nDestination++] = 0;
+			++nOriginalLen;
+		}
+
+		if(pTempByte->v7==0)
+		{
+			if(nSource < nBufferCount)		
+				lpDestination[nDestination++] = lpData[nSource++];
+		}
+		else
+		{
+			lpDestination[nDestination++] = 0;
+			++nOriginalLen;
+		}
+
+		if(pTempByte->v8==0)
+		{
+			if(nSource < nBufferCount)		
+				lpDestination[nDestination++] = lpData[nSource++];
+		}
+		else
+		{
+			lpDestination[nDestination++] = 0;
+			++nOriginalLen;
+		}
+	}
+
+	// 아직 데이타가 남아있으면 넣어준다
+	// (m_pArrayBuffer 처리 이후에도 값이 남아있는경우는 (byte단위로)NULL값 없이 연속으로 데이터가 있는경우이다)
+	for( ; nSource < nBufferCount;)
+	{
+		lpDestination[nDestination++] = lpData[nSource++];
+	}
+
+	return nOriginalLen;
+}
+