com.healthmarketscience.jackcess.impl.office
Class BlockCipherProvider

java.lang.Object
  com.healthmarketscience.jackcess.impl.BaseCryptCodecHandler
      com.healthmarketscience.jackcess.impl.OfficeCryptCodecHandler
          com.healthmarketscience.jackcess.impl.office.BlockCipherProvider

All Implemented Interfaces:

com.healthmarketscience.jackcess.impl.CodecHandler

Direct Known Subclasses:

AgileEncryptionProvider, ECMAStandardEncryptionProvider

public abstract class BlockCipherProvider
extends OfficeCryptCodecHandler

Author:

James Ahlborn

Nested Class Summary

Nested classes/interfaces inherited from class com.healthmarketscience.jackcess.impl.OfficeCryptCodecHandler

OfficeCryptCodecHandler.Phase

Field Summary

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

CIPHER_DECRYPT_MODE, CIPHER_ENCRYPT_MODE

Constructor Summary

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

Method Summary

boolean	canDecodeInline()
boolean	canEncodePartialPage()
protected void	decodePageImpl(ByteBuffer inPage, ByteBuffer outPage, int pageNumber)
ByteBuffer	encodePageImpl(ByteBuffer buffer, int pageNumber, int pageOffset)
protected org.bouncycastle.crypto.BufferedBlockCipher	getBlockCipher()
protected org.bouncycastle.crypto.BlockCipher	initCipher()
protected org.bouncycastle.crypto.BlockCipher	initCryptCipher()
protected org.bouncycastle.crypto.BlockCipher	initPwdCipher()
protected void	reset()

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

bits2bytes, create, decodePage, encodePage, getDigest, getPhase, initCryptDigest, initDigest, initPwdDigest, int2bytes, iterateHash, verifyPassword

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

applyPageNumber, blockDecrypt, blockDecryptBytes, blockEncrypt, computeCipherParams, decryptBytes, decryptBytes, decryptInit, decryptInit, encryptInit, encryptInit, fill, fixToLength, fixToLength, getCipherParams, getEncodingKey, getEncodingKey, getStreamCipher, 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

BlockCipherProvider

public BlockCipherProvider(com.healthmarketscience.jackcess.impl.PageChannel channel,
                           byte[] encodingKey)

Method Detail

getBlockCipher

protected org.bouncycastle.crypto.BufferedBlockCipher getBlockCipher()

Overrides:

getBlockCipher in class BaseCryptCodecHandler

canEncodePartialPage

public final boolean canEncodePartialPage()

canDecodeInline

public final boolean canDecodeInline()

initCipher

protected org.bouncycastle.crypto.BlockCipher initCipher()

initPwdCipher

protected org.bouncycastle.crypto.BlockCipher initPwdCipher()

initCryptCipher

protected org.bouncycastle.crypto.BlockCipher initCryptCipher()

decodePageImpl

protected void decodePageImpl(ByteBuffer inPage,
                              ByteBuffer outPage,
                              int pageNumber)

Specified by:

decodePageImpl in class OfficeCryptCodecHandler

encodePageImpl

public ByteBuffer encodePageImpl(ByteBuffer buffer,
                                 int pageNumber,
                                 int pageOffset)
                          throws IOException

Specified by:

encodePageImpl in class OfficeCryptCodecHandler

Throws:

IOException

reset

protected void reset()

Overrides:

reset in class OfficeCryptCodecHandler