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Fork of Esoteric Software's Kryo built by Nathan Sweet that replaces Minlog with slf4j as the logging facade. This contains the shaded reflectasm jar to prevent conflicts with other versions of asm.

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/* Copyright (c) 2008, Nathan Sweet
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
 * conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 * - 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.
 * - Neither the name of Esoteric Software 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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 com.esotericsoftware.kryo.serializers;

import java.io.IOException;

import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.spec.SecretKeySpec;

import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.KryoException;
import com.esotericsoftware.kryo.Serializer;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;

/** Encrypts data using the blowfish cipher.
 * @author Nathan Sweet  */
public class BlowfishSerializer extends Serializer {
	private final Serializer serializer;
	static private SecretKeySpec keySpec;

	public BlowfishSerializer (Serializer serializer, byte[] key) {
		this.serializer = serializer;
		keySpec = new SecretKeySpec(key, "Blowfish");
	}

	public void write (Kryo kryo, Output output, Object object) {
		Cipher cipher = getCipher(Cipher.ENCRYPT_MODE);
		CipherOutputStream cipherStream = new CipherOutputStream(output, cipher);
		Output cipherOutput = new Output(cipherStream, 256) {
			public void close () throws KryoException {
				// Don't allow the CipherOutputStream to close the output.
			}
		};
		serializer.write(kryo, cipherOutput, object);
		cipherOutput.flush();
		try {
			cipherStream.close();
		} catch (IOException ex) {
			throw new KryoException(ex);
		}
	}

	public Object read (Kryo kryo, Input input, Class type) {
		Cipher cipher = getCipher(Cipher.DECRYPT_MODE);
		CipherInputStream cipherInput = new CipherInputStream(input, cipher);
		return serializer.read(kryo, new Input(cipherInput, 256), type); 
	}

	public Object copy (Kryo kryo, Object original) {
		return serializer.copy(kryo, original);
	}

	static private Cipher getCipher (int mode) {
		try {
			Cipher cipher = Cipher.getInstance("Blowfish");
			cipher.init(mode, keySpec);
			return cipher;
		} catch (Exception ex) {
			throw new KryoException(ex);
		}
	}
}