/*
* Copyright (c) 2016. Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 com.amazonaws.services.elasticmapreduce.spi.security;
import java.util.Map;
/**
* Interface for providing encryption materials.
* Implementations are free to use any strategy for providing encryption materials,
* such as simply providing static material that doesn't change,
* or more complicated implementations, such as integrating with existing key management systems.
*/
public abstract class EncryptionMaterialsProvider {
/**
* Gets encryption materials by encryption context.
* This is used when EMR fetches encryption materials to do encryption.
* EMR will populate encryption context information at runtime to help users to determine
* which encryption materials to return.
* @param encryptionContext
* @return EncryptionMaterials which caller can use to encrypt or decrypt data
*/
public abstract EncryptionMaterials getEncryptionMaterials(EncryptionContext encryptionContext);
/**
* Gets encryption materials by material description.
* This is used when EMR fetches encryption materials to do decryption.
* The material description can be any information defined by users that uniquely identifies
* a encryption material in user's system.
* @param materialDescription
* @return EncryptionMaterials which caller can use to encrypt or decrypt data
*/
public abstract EncryptionMaterials getEncryptionMaterials(Map<String, String> materialDescription);
}