Add xtea utility, using bouncycastle xtea implementation

cache/src/test/java/net/runelite/cache/fs/util/XteaTest.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2016, Adam <Adam@sigterm.info>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    This product includes software developed by Adam <Adam@sigterm.info>
+ * 4. Neither the name of the Adam <Adam@sigterm.info> nor the
+ *    names of its contributors may be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Adam <Adam@sigterm.info> ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Adam <Adam@sigterm.info> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.cache.fs.util;
+
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.util.Random;
+import javax.crypto.BadPaddingException;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class XteaTest
+{
+	private final Random random = new Random(42L);
+	
+	@Test
+	public void test() throws InvalidKeyException, IllegalBlockSizeException, BadPaddingException, NoSuchAlgorithmException, NoSuchPaddingException
+	{
+		byte[] data = new byte[1024];
+		random.nextBytes(data);
+		
+		int[] key = new int[] { 4, 8, 15, 16 };
+		
+		Xtea xtea = new Xtea(key);
+		byte[] encData = xtea.encrypt(data, data.length);
+
+		xtea = new Xtea(key);
+		byte[] decData = xtea.decrypt(encData, encData.length);
+
+		Assert.assertArrayEquals(data, decData);
+	}
+}