net.sf.hajdbc.codec.crypto.CipherCodec.java Source code

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Here is the source code for net.sf.hajdbc.codec.crypto.CipherCodec.java

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/*
 * HA-JDBC: High-Availability JDBC
 * Copyright (C) 2012  Paul Ferraro
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.hajdbc.codec.crypto;

import java.security.GeneralSecurityException;
import java.security.Key;
import java.sql.SQLException;

import javax.crypto.Cipher;

import net.sf.hajdbc.codec.Codec;

import org.apache.commons.codec.binary.Base64;

/**
 * Generic cryptographic codec.
 * @author Paul Ferraro
 */
public class CipherCodec implements Codec {
    private final Key key;

    public CipherCodec(Key key) {
        this.key = key;
    }

    public Key getKey() {
        return this.key;
    }

    /**
     * {@inheritDoc}
     * @see net.sf.hajdbc.codec.Codec#decode(java.lang.String)
     */
    @Override
    public String decode(String value) throws SQLException {
        try {
            Cipher cipher = Cipher.getInstance(this.key.getAlgorithm());

            cipher.init(Cipher.DECRYPT_MODE, this.key);

            return new String(cipher.doFinal(Base64.decodeBase64(value.getBytes())));
        } catch (GeneralSecurityException e) {
            throw new SQLException(e);
        }
    }

    /**
     * {@inheritDoc}
     * @see net.sf.hajdbc.codec.Codec#encode(java.lang.String)
     */
    @Override
    public String encode(String value) throws SQLException {
        try {
            Cipher cipher = Cipher.getInstance(this.key.getAlgorithm());

            cipher.init(Cipher.ENCRYPT_MODE, this.key);

            return new String(Base64.encodeBase64(cipher.doFinal(value.getBytes())));
        } catch (GeneralSecurityException e) {
            throw new SQLException(e);
        }
    }
}