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.

Author:

James Ahlborn

Field Summary

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(ByteBuffer inPage, ByteBuffer outPage, int pageNumber)
ByteBuffer	encodePage(ByteBuffer buffer, int pageNumber, int pageOffset)
protected abstract int	getMaxEncodedPage()
protected org.bouncycastle.crypto.engines.RC4Engine	getStreamCipher()

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

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 org.bouncycastle.crypto.engines.RC4Engine getStreamCipher()

Overrides:

getStreamCipher in class BaseCryptCodecHandler

decodePage

public void decodePage(ByteBuffer inPage,
                       ByteBuffer outPage,
                       int pageNumber)

encodePage

public ByteBuffer encodePage(ByteBuffer buffer,
                             int pageNumber,
                             int pageOffset)

getMaxEncodedPage

protected abstract int getMaxEncodedPage()