com.ksyun.ks3.service.encryption.internal

类 RepeatableCipherInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

com.ksyun.ks3.service.encryption.internal.AbstractRepeatableCipherInputStream<CipherFactory>

com.ksyun.ks3.service.encryption.internal.RepeatableCipherInputStream

所有已实现的接口:

Closeable, AutoCloseable

public class RepeatableCipherInputStream
extends AbstractRepeatableCipherInputStream<CipherFactory>

Wraps an InputStream with a CipherInputStream to encrypt it, and handles resets by attempting to reset on the original, unencrypted data InputStream, and recreate an identical Cipher and identical CipherInputStream on the original data.

It's repeatable if and only if the underlying unencryptedDataStream is repeatable - if the underlying input stream is not repeatable and you're going to buffer to make it repeatable anyways, it makes more sense to do so after wrapping in this object, so we buffer the encrypted data and don't have to bother re-encrypting on retry.

This stream only supports being marked before the first call to read or skip, since it's not possible to rewind the encryption state of a CipherInputStream to an arbitrary point. If you call mark after calling read or skip, it will throw an UnsupportedOperationException.

字段概要

从类继承的字段 java.io.FilterInputStream

in

构造器概要

构造器

构造器和说明
RepeatableCipherInputStream(InputStream input, CipherFactory cipherFactory) Constructs a new repeatable cipher input stream using the specified InputStream as the source data, and the CipherFactory for building Cipher objects.

方法概要

方法

限定符和类型	方法和说明
protected FilterInputStream	createCipherInputStream(InputStream unencryptedDataStream, CipherFactory cipherFactory)

从类继承的方法 com.ksyun.ks3.service.encryption.internal.AbstractRepeatableCipherInputStream

mark, markSupported, read, read, read, reset, skip

从类继承的方法 java.io.FilterInputStream

available, close

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

RepeatableCipherInputStream

public RepeatableCipherInputStream(InputStream input,
                           CipherFactory cipherFactory)

Constructs a new repeatable cipher input stream using the specified InputStream as the source data, and the CipherFactory for building Cipher objects.

参数:

input - The original, unencrypted data stream. This stream should be markable/resetable in order for this class to work correctly.

cipherFactory - The factory used for creating identical cipher objects when this stream is reset and a new CipherInputStream is needed.

方法详细资料

createCipherInputStream

protected FilterInputStream createCipherInputStream(InputStream unencryptedDataStream,
                                        CipherFactory cipherFactory)

指定者:

createCipherInputStream 在类中 AbstractRepeatableCipherInputStream<CipherFactory>