/*
* Syncany, www.syncany.org
* Copyright (C) 2011-2015 Philipp C. Heckel <philipp.heckel@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.syncany.crypto;
import javax.crypto.spec.SecretKeySpec;
import org.simpleframework.xml.convert.Converter;
import org.simpleframework.xml.stream.InputNode;
import org.simpleframework.xml.stream.OutputNode;
import org.syncany.util.StringUtil;
/**
* Converter to properly encode a {@link SaltedSecretKey} when writing
* an XML. Salt and key are serialized as attributes.
*
* @author Christian Roth <christian.roth@port17.de>
*/
public class SaltedSecretKeyConverter implements Converter<SaltedSecretKey> {
public SaltedSecretKey read(InputNode node) throws Exception {
byte[] saltBytes = StringUtil.fromHex(node.getAttribute("salt").getValue());
byte[] keyBytes = StringUtil.fromHex(node.getAttribute("key").getValue());
return new SaltedSecretKey(new SecretKeySpec(keyBytes, CipherParams.MASTER_KEY_DERIVATION_FUNCTION), saltBytes);
}
public void write(OutputNode node, SaltedSecretKey saltedSecretKey) {
node.setAttribute("salt", StringUtil.toHex(saltedSecretKey.getSalt()));
node.setAttribute("key", StringUtil.toHex(saltedSecretKey.getEncoded()));
}
}