/*
* 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.flume.channel.file.encryption;
import java.security.Key;
import com.google.common.base.Preconditions;
public abstract class CipherProvider {
public abstract Encryptor.Builder<?> newEncryptorBuilder();
public abstract Decryptor.Builder<?> newDecryptorBuilder();
public static abstract class Encryptor {
public abstract byte[] encrypt(byte[] clearText);
public abstract byte[] getParameters();
public abstract String getCodec();
/** Builder implementations MUST have a no-arg constructor */
public static abstract class Builder<T extends Encryptor> {
protected Key key;
public Builder<T> setKey(Key key) {
this.key = Preconditions.checkNotNull(key, "key cannot be null");
return this;
}
public abstract T build();
}
}
public static abstract class Decryptor {
public abstract byte[] decrypt(byte[] cipherText);
public abstract String getCodec();
/** Builder implementations MUST have a no-arg constructor */
public static abstract class Builder<T extends Decryptor> {
protected byte[] parameters;
protected Key key;
public Builder<T> setKey(Key key) {
this.key = Preconditions.checkNotNull(key, "key cannot be null");
return this;
}
public Builder<T> setParameters(byte[] parameters) {
this.parameters = parameters;
return this;
}
public abstract T build();
}
}
}