bundles/org.eclipse.core.runtime.compatibility.auth/src/org/eclipse/core/internal/runtime/auth/CipherOutputStream.java

/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.internal.runtime.auth;

import java.io.*;

/**
 * Encrypts a stream of data that can be decrypted using the
 * <code>Cipher</code> or <code>CipherInputStream</code>.
 *
 * @see Cipher
 * @see CipherInputStream
 */
public class CipherOutputStream extends FilterOutputStream {
	private Cipher cipher;

	/**
	 * Constructs a new <code>CipherOutputStream</code> that encrypts the
	 * data in the given <code>OutputStream</code>.  Once the data is
	 * encrypted it can be decrypted by suppying the encrupted data and
	 * given password to a <code>Cipher</code> or
	 * <code>CipherInputStream</code>.
	 *
	 * @param os
	 * @param password
	 */
	public CipherOutputStream(OutputStream os, String password) {
		super(os);
		cipher = new Cipher(Cipher.ENCRYPT_MODE, password);
	}

	/**
	 * @see OutputStream#write(int)
	 */
	public void write(int b) throws IOException {
		try {
			out.write(cipher.cipher((byte) b));
		} catch (Exception e) {
			throw new IOException(e.getMessage());
		}
	}
}