LosaDev source snapshot 2019

extra/LS_TTBot/network/cryption.cpp

@@ -0,0 +1,50 @@
+#include "../stdafx.h"
+#include "md5.h"
+#include "cryption.h"
+
+void Encrypt(BYTE *szSrc, int len)
+{
+	BYTE ch;
+	BYTE temp;
+
+	for( int i=0 ; i<len ; i++ )
+	{
+		ch = szSrc[i];
+		ch ^= 0xff;
+		temp = (ch & 0xe0) >> 5;
+		ch <<= 3;
+		ch |= temp;
+		szSrc[i] = ch;
+	}
+}
+
+void Decrypt(BYTE *szSrc, int len)
+{
+	BYTE ch;
+	BYTE temp;
+
+	for( int i=0 ; i<len ; i++ )
+	{
+		ch = szSrc[i];
+		temp = (ch & 0x07) << 5;
+		ch>>=3;
+		ch |= temp;
+		ch ^= 0xff;
+		szSrc[i] = ch;
+	}	
+}
+
+DWORD MakeDigest( BYTE *szSrc, int len )
+{
+	MD5Context md5_ctx;
+	DWORD	dwDigest[4];
+	
+	MD5Init( &md5_ctx );
+	MD5Update( &md5_ctx, (unsigned char const *)szSrc, len );
+	MD5Final( (BYTE*)&dwDigest, &md5_ctx );
+	
+	DWORD dwResult;
+	dwResult = dwDigest[0] ^ dwDigest[1] ^ dwDigest[2] ^ dwDigest[3];
+	
+	return dwResult;
+}