org.apache.geronimo.crypto.ConfiguredEncryption.java Source code

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Here is the source code for org.apache.geronimo.crypto.ConfiguredEncryption.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.geronimo.crypto;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.SecureRandom;

import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.geronimo.crypto.AbstractEncryption;

/* 
* @version $Rev: 1334031 $ $Date: 2012-05-04 23:23:16 +0800 (Fri, 04 May 2012) $
*/
public class ConfiguredEncryption extends AbstractEncryption {

    private final static Log log = LogFactory.getLog(ConfiguredEncryption.class);

    private SecretKeySpec spec;

    public ConfiguredEncryption(String location) throws IOException {
        File keyFile = new File(location);
        ObjectInputStream oin = null;
        if (keyFile != null) {
            if (keyFile.exists()) {
                FileInputStream fi = new FileInputStream(keyFile);
                try {
                    oin = new ObjectInputStream(fi);
                    spec = (SecretKeySpec) oin.readObject();
                } catch (ClassNotFoundException e) {
                    log.error("Unable to read object or class not found: ", e);
                } finally {
                    if (oin != null)
                        oin.close();
                    if (fi != null)
                        fi.close();
                }
            } else {
                SecureRandom random = new SecureRandom();
                random.setSeed(System.currentTimeMillis());
                byte[] bytes = new byte[16];
                random.nextBytes(bytes);
                spec = new SecretKeySpec(bytes, "AES");
                File dir = keyFile.getParentFile();
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                if (!dir.exists() || !dir.isDirectory()) {
                    throw new IllegalStateException("Could not create directory for secret key spec: " + dir);
                }
                FileOutputStream out = new FileOutputStream(keyFile);
                try {
                    ObjectOutputStream oout = new ObjectOutputStream(out);
                    try {
                        oout.writeObject(spec);
                        oout.flush();
                    } finally {
                        oout.close();
                    }
                } finally {
                    out.close();
                }
                log.info("Generate a new configured encryption password: " + spec.getEncoded().toString());
            }
        }
    }

    @Override
    protected SecretKeySpec getSecretKeySpec() {
        return spec;
    }

}