org.linguafranca.pwdb.Credentials Maven / Gradle / Ivy
/*
* Copyright 2015 Jo Rabin
*
* Licensed 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.linguafranca.pwdb;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* Supports a contract that yields a key for decryption of databases
*
* @author jo
*/
public interface Credentials {
/**
* Implementation of no credentials
*/
class None implements Credentials {
@Override
public byte[] getKey() {
MessageDigest md = null;
try {
md = MessageDigest.getInstance("SHA-256");
} catch (NoSuchAlgorithmException e) {
throw new IllegalStateException(e);
}
return md.digest(new byte[0]);
}
}
byte [] getKey();
}