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/*
* 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.model;
import java.io.Serializable;
import java.util.Map;
/**
*
* An extension of {@link GetObjectRequest} to allow additional encryption material description to
* be specified on a per-request basis. In particular, {@link EncryptedGetObjectRequest} is only
* recognized by {@link COSEncryptionClient}.
*
*
* If {@link EncryptedGetObjectRequest} is used against the non-encrypting
* {@link COSEncryptionClient}, the additional attributes will be ignored.
*
*
* The additional material description must not conflict with the existing one saved in COS or else
* will cause the get request to fail fast later on.
*/
public class EncryptedGetObjectRequest extends GetObjectRequest implements Serializable {
/**
* Used to retrieve the COS encrypted object via instruction file with an explicit suffix.
* Applicable only if specified (which means non-null and non-blank.)
*/
private String instructionFileSuffix;
/**
* True if the retrieval of the encrypted object expects the CEK to have been key-wrapped;
* Default is false.
*
* Note, however, that if {@link CryptoMode#StrictAuthenticatedEncryption} is in use, key
* wrapping is always expected for the CEK regardless.
*/
private boolean keyWrapExpected;
public EncryptedGetObjectRequest(String bucketName, String key) {
this(bucketName, key, null);
}
public EncryptedGetObjectRequest(String bucketName, String key, String versionId) {
super(bucketName, key, versionId);
setKey(key);
setVersionId(versionId);
}
public EncryptedGetObjectRequest(COSObjectId cosObjectId) {
super(cosObjectId);
}
public String getInstructionFileSuffix() {
return instructionFileSuffix;
}
/**
* Explicitly sets the suffix of an instruction file to be used to retrieve the COS encrypted
* object. Typically this is for more advanced use cases where multiple crypto instruction files
* have been created for the same COS object. Each instruction file contains the same CEK
* encrypted under a different KEK, the IV, and other meta information (aka material
* description).
*
* @param instructionFileSuffix suffix of the instruction file to be used.
*
* @see COSEncryptionClient#putInstructionFile(PutInstructionFileRequest)
*/
public void setInstructionFileSuffix(String instructionFileSuffix) {
this.instructionFileSuffix = instructionFileSuffix;
}
/**
* Fluent API to explicitly sets the suffix of an instruction file to be used to retrieve the COS
* encrypted object. Typically this is for more advanced use cases where multiple crypto
* instruction files have been created for the same COS object. Each instruction file contains
* the same CEK encrypted under a different KEK, the IV, and other meta information (aka
* material description).
*
* @param instructionFileSuffix suffix of the instruction file to be used.
*
* @see COSEncryptionClient#putInstructionFile(PutInstructionFileRequest)
*/
public EncryptedGetObjectRequest withInstructionFileSuffix(String instructionFileSuffix) {
this.instructionFileSuffix = instructionFileSuffix;
return this;
}
/**
* Returns true if key wrapping is expected; false otherwise. Note, however, that if
* {@link CryptoMode#StrictAuthenticatedEncryption} or KMS is in use, key wrapping is always
* expected for the CEK regardless.
*/
public boolean isKeyWrapExpected() {
return keyWrapExpected;
}
/**
* @param keyWrapExpected true if key wrapping is expected for the CEK; false otherwse. Note,
* however, that if {@link CryptoMode#StrictAuthenticatedEncryption} or KMS is in use,
* key wrapping is always expected for the CEK regardless.
*
* If keyWrapExpected is set to true but the CEK is found to be not key-wrapped, it would
* cause a {@link KeyWrapException} to be thrown.
*/
public void setKeyWrapExpected(boolean keyWrapExpected) {
this.keyWrapExpected = keyWrapExpected;
}
/**
* Fluent API for {@link #setKeyWrapExpected(boolean)}.
*/
public EncryptedGetObjectRequest withKeyWrapExpected(boolean keyWrapExpected) {
this.keyWrapExpected = keyWrapExpected;
return this;
}
}