actual freya branch

L2J_Server/java/com/l2jserver/util/crypt/LoginCrypt.java

@@ -0,0 +1,87 @@
+/*
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ * 
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.l2jserver.util.crypt;
+
+import java.io.IOException;
+
+import com.l2jserver.util.Rnd;
+
+/**
+ * @author KenM
+ */
+public class LoginCrypt
+{
+	private static final byte[] STATIC_BLOWFISH_KEY =
+	{
+		(byte) 0x6b,
+		(byte) 0x60,
+		(byte) 0xcb,
+		(byte) 0x5b,
+		(byte) 0x82,
+		(byte) 0xce,
+		(byte) 0x90,
+		(byte) 0xb1,
+		(byte) 0xcc,
+		(byte) 0x2b,
+		(byte) 0x6c,
+		(byte) 0x55,
+		(byte) 0x6c,
+		(byte) 0x6c,
+		(byte) 0x6c,
+		(byte) 0x6c
+	};
+	
+	private final NewCrypt _staticCrypt = new NewCrypt(STATIC_BLOWFISH_KEY);
+	private NewCrypt _crypt;
+	private boolean _static = true;
+	
+	public void setKey(byte[] key)
+	{
+		_crypt = new NewCrypt(key);
+	}
+	
+	public boolean decrypt(byte[] raw, final int offset, final int size) throws IOException
+	{
+		_crypt.decrypt(raw, offset, size);
+		return NewCrypt.verifyChecksum(raw, offset, size);
+	}
+	
+	public int encrypt(byte[] raw, final int offset, int size) throws IOException
+	{
+		// reserve checksum
+		size += 4;
+		
+		if (_static)
+		{
+			// reserve for XOR "key"
+			size += 4;
+			
+			// padding
+			size += 8 - (size % 8);
+			NewCrypt.encXORPass(raw, offset, size, Rnd.nextInt());
+			_staticCrypt.crypt(raw, offset, size);
+			
+			_static = false;
+		}
+		else
+		{
+			// padding
+			size += 8 - (size % 8);
+			NewCrypt.appendChecksum(raw, offset, size);
+			_crypt.crypt(raw, offset, size);
+		}
+		return size;
+	}
+}