com.amazonaws.encryptionsdk.DataKey Maven / Gradle / Ivy

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/*
 * Copyright 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.encryptionsdk;

import javax.crypto.SecretKey;

/**
 * Represents both the cleartext and encrypted bytes of a data key.
 *
 * @param 
 *            the type of {@link MasterKey} used to protect this {@code DataKey}.
 */
public class DataKey> implements EncryptedDataKey {
    private final byte[] providerInformation_;
    private final byte[] encryptedDataKey_;
    private final SecretKey key_;
    private final M masterKey_;

    public DataKey(final SecretKey key, final byte[] encryptedDataKey, final byte[] providerInformation,
            final M masterKey) {
        super();
        key_ = key;
        encryptedDataKey_ = encryptedDataKey.clone();
        providerInformation_ = providerInformation.clone();
        masterKey_ = masterKey;
    }

    /**
     * Returns the cleartext bytes of the data key.
     */
    public SecretKey getKey() {
        return key_;
    }

    @Override
    public String getProviderId() {
        return masterKey_.getProviderId();
    }

    @Override
    public byte[] getProviderInformation() {
        return providerInformation_.clone();
    }

    @Override
    public byte[] getEncryptedDataKey() {
        return encryptedDataKey_.clone();
    }

    /**
     * Returns the {@link MasterKey} used to encrypt this {@link DataKey}.
     */
    public M getMasterKey() {
        return masterKey_;
    }
}