com.healthmarketscience.jackcess.impl

Class BaseJetCryptCodecHandler

java.lang.Object

com.healthmarketscience.jackcess.impl.BaseCryptCodecHandler

com.healthmarketscience.jackcess.impl.BaseJetCryptCodecHandler

All Implemented Interfaces:

com.healthmarketscience.jackcess.impl.CodecHandler

Direct Known Subclasses:

JetCryptCodecHandler, MSISAMCryptCodecHandler

public abstract class BaseJetCryptCodecHandler
extends BaseCryptCodecHandler

Base CodecHandler support for Jet RC4 encryption based CodecHandlers.

Field Summary

Fields

Modifier and Type	Field and Description
private StreamCipherCompat	_engine

Fields inherited from class com.healthmarketscience.jackcess.impl.BaseCryptCodecHandler

CIPHER_DECRYPT_MODE, CIPHER_ENCRYPT_MODE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BaseJetCryptCodecHandler(com.healthmarketscience.jackcess.impl.PageChannel channel, byte[] encodingKey)

Method Summary

Modifier and Type	Method and Description
boolean	canDecodeInline()
boolean	canEncodePartialPage()
void	decodePage(java.nio.ByteBuffer inPage, java.nio.ByteBuffer outPage, int pageNumber)
java.nio.ByteBuffer	encodePage(java.nio.ByteBuffer buffer, int pageNumber, int pageOffset)
protected abstract int	getMaxEncodedPage()
protected StreamCipherCompat	getStreamCipher()
private boolean	isEncryptedPage(int pageNumber)

Methods inherited from class com.healthmarketscience.jackcess.impl.BaseCryptCodecHandler

applyPageNumber, blockDecrypt, blockDecryptBytes, blockEncrypt, computeCipherParams, decryptBytes, decryptBytes, decryptInit, decryptInit, encryptInit, encryptInit, fill, fixToLength, fixToLength, getBlockCipher, getCipherParams, getEncodingKey, getEncodingKey, getTempBuffer, hash, hash, hash, hash, isBlankKey, processBytesFully, readHeaderPage, streamDecrypt, streamEncrypt, toString, wrap

Methods inherited from class java.lang.Object

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

Field Detail

_engine

private StreamCipherCompat _engine

Constructor Detail

BaseJetCryptCodecHandler

protected BaseJetCryptCodecHandler(com.healthmarketscience.jackcess.impl.PageChannel channel,
                                   byte[] encodingKey)

Method Detail

canEncodePartialPage

public boolean canEncodePartialPage()

canDecodeInline

public boolean canDecodeInline()

getStreamCipher

protected final StreamCipherCompat getStreamCipher()

Overrides:

getStreamCipher in class BaseCryptCodecHandler

decodePage

public void decodePage(java.nio.ByteBuffer inPage,
                       java.nio.ByteBuffer outPage,
                       int pageNumber)

encodePage

public java.nio.ByteBuffer encodePage(java.nio.ByteBuffer buffer,
                                      int pageNumber,
                                      int pageOffset)

isEncryptedPage

private boolean isEncryptedPage(int pageNumber)

getMaxEncodedPage

protected abstract int getMaxEncodedPage()