/*
 * Copyright 2010-2019 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.
 
 * According to cos feature, we modify some class，comment, field name, etc.
 */


package com.qcloud.cos.internal.crypto;

/**
 * Denotes the different storage modes available for storing the encryption information that
 * accompanies encrypted objects in COS. The encryption information includes an encrypted envelope
 * symmetric key, an initialization vector, and a description of the encryption materials used
 * during encryption.
 * <p>
 * ObjectMetadata is the default storage mode. If the ObjectMetadata mode is used, then encryption
 * information will be placed in the metadata of the encrypted object stored in COS. Note: There is
 * a 2 KB limit on the size of the metadata, so be careful that you do not run out of space if you
 * are storing a lot of your own metadata.
 * <p>
 * If the InstructionFile mode is used, then encryption information will be placed in a separate
 * instruction file that will be stored in the same bucket as the encrypted object in COS. No
 * metadata will be used for storing encryption information.
 */
public enum CryptoStorageMode {
    InstructionFile, 
    ObjectMetadata
}
