com.qcloud.cos.internal.crypto

类 COSCryptoModuleAE

java.lang.Object

com.qcloud.cos.internal.crypto.COSCryptoModule

com.qcloud.cos.internal.crypto.COSCryptoModuleBase

com.qcloud.cos.internal.crypto.COSCryptoModuleAE

直接已知子类:

COSCryptoModuleAEStrict

public class COSCryptoModuleAE
extends COSCryptoModuleBase

字段概要

从类继承的字段 com.qcloud.cos.internal.crypto.COSCryptoModuleBase

contentCryptoScheme, cos, cryptoConfig, cryptoScheme, DEFAULT_BUFFER_SIZE, kekMaterialsProvider, kms, log, multipartUploadContexts

构造器概要

构造器

构造器和说明
COSCryptoModuleAE(COSDirect cos, COSCredentialsProvider credentialsProvider, EncryptionMaterialsProvider kekMaterialsProvider, CryptoConfiguration cryptoConfig)
COSCryptoModuleAE(QCLOUDKMS kms, COSDirect cos, COSCredentialsProvider credentialsProvider, EncryptionMaterialsProvider kekMaterialsProvider, CryptoConfiguration cryptoConfig)

方法概要

限定符和类型	方法和说明
protected COSObjectWrapper	adjustToDesiredRange(COSObjectWrapper cosObject, long[] range, Map<String,String> instruction) Adjusts the retrieved COSObject so that the object contents contain only the range of bytes desired by the user.
protected long	ciphertextLength(long originalContentLength) Returns the length of the ciphertext computed from the length of the plaintext.
COSObject	getObjectSecurely(GetObjectRequest req)
ObjectMetadata	getObjectSecurely(GetObjectRequest getObjectRequest, File destinationFile)
protected boolean	isStrict() Returns true if a strict encryption mode is in use in the current crypto module; false otherwise.

从类继承的方法 com.qcloud.cos.internal.crypto.COSCryptoModuleBase

abortMultipartUploadSecurely, completeMultipartUploadSecurely, copyPartSecurely, createContentCryptoMaterial, createInstructionPutRequest, generateCEK, getCOSCryptoScheme, initiateMultipartUploadSecurely, newMultipartCOSCipherInputStream, plaintextLength, putInstructionFileSecurely, putObjectSecurely, securityCheck, updateInstructionPutRequest, updateMetadataWithContentCryptoMaterial, uploadPartSecurely, wrapWithCipher

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

COSCryptoModuleAE

public COSCryptoModuleAE(COSDirect cos,
                         COSCredentialsProvider credentialsProvider,
                         EncryptionMaterialsProvider kekMaterialsProvider,
                         CryptoConfiguration cryptoConfig)

COSCryptoModuleAE

public COSCryptoModuleAE(QCLOUDKMS kms,
                         COSDirect cos,
                         COSCredentialsProvider credentialsProvider,
                         EncryptionMaterialsProvider kekMaterialsProvider,
                         CryptoConfiguration cryptoConfig)

方法详细资料

isStrict

protected boolean isStrict()

Returns true if a strict encryption mode is in use in the current crypto module; false otherwise.

getObjectSecurely

public COSObject getObjectSecurely(GetObjectRequest req)

指定者:

getObjectSecurely 在类中 COSCryptoModule

adjustToDesiredRange

protected final COSObjectWrapper adjustToDesiredRange(COSObjectWrapper cosObject,
                                                      long[] range,
                                                      Map<String,String> instruction)

Adjusts the retrieved COSObject so that the object contents contain only the range of bytes desired by the user. Since encrypted contents can only be retrieved in CIPHER_BLOCK_SIZE (16 bytes) chunks, the COSObject potentially contains more bytes than desired, so this method adjusts the contents range.

参数:

cosObject - The COSObject retrieved from COS that could possibly contain more bytes than desired by the user.

range - A two-element array of longs corresponding to the start and finish (inclusive) of a desired range of bytes.

instruction - Instruction file in JSON or null if no instruction file is involved

返回:

The COSObject with adjusted object contents containing only the range desired by the user. If the range specified is invalid, then the COSObject is returned without any modifications.

getObjectSecurely

public ObjectMetadata getObjectSecurely(GetObjectRequest getObjectRequest,
                                        File destinationFile)

指定者:

getObjectSecurely 在类中 COSCryptoModule

ciphertextLength

protected final long ciphertextLength(long originalContentLength)

从类复制的说明: COSCryptoModuleBase

Returns the length of the ciphertext computed from the length of the plaintext.

指定者:

ciphertextLength 在类中 COSCryptoModuleBase

参数:

originalContentLength - a non-negative number

返回:

a non-negative number