com.healthmarketscience.jackcess.impl
Class OfficeCryptCodecHandler

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

All Implemented Interfaces:

com.healthmarketscience.jackcess.impl.CodecHandler

Direct Known Subclasses:

BlockCipherProvider, StreamCipherProvider

public abstract class OfficeCryptCodecHandler
extends BaseCryptCodecHandler

CryptCodecHandler for the Office Document Cryptography standard.

Author:

James Ahlborn

Nested Class Summary

protected static class

OfficeCryptCodecHandler.Phase

Field Summary

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

CIPHER_DECRYPT_MODE, CIPHER_ENCRYPT_MODE

Constructor Summary

protected

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

Method Summary

protected static int	bits2bytes(int bits)
static com.healthmarketscience.jackcess.impl.CodecHandler	create(PasswordCallback callback, com.healthmarketscience.jackcess.impl.PageChannel channel, Charset charset)
void	decodePage(ByteBuffer inPage, ByteBuffer outPage, int pageNumber)
protected abstract void	decodePageImpl(ByteBuffer inPage, ByteBuffer outPage, int pageNumber)
ByteBuffer	encodePage(ByteBuffer buffer, int pageNumber, int pageOffset)
protected abstract ByteBuffer	encodePageImpl(ByteBuffer buffer, int pageNumber, int pageOffset)
protected org.bouncycastle.crypto.Digest	getDigest()
protected OfficeCryptCodecHandler.Phase	getPhase()
protected org.bouncycastle.crypto.Digest	initCryptDigest()
protected org.bouncycastle.crypto.Digest	initDigest()
protected org.bouncycastle.crypto.Digest	initPwdDigest()
protected byte[]	int2bytes(int val)
protected byte[]	iterateHash(byte[] baseHash, int iterations)
protected void	reset()
protected abstract boolean	verifyPassword(byte[] pwdBytes)

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, 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

Methods inherited from interface com.healthmarketscience.jackcess.impl.CodecHandler

canDecodeInline, canEncodePartialPage

Constructor Detail

OfficeCryptCodecHandler

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

Method Detail

create

public static com.healthmarketscience.jackcess.impl.CodecHandler create(PasswordCallback callback,
                                                                        com.healthmarketscience.jackcess.impl.PageChannel channel,
                                                                        Charset charset)
                                                                 throws IOException

Throws:

IOException

getPhase

protected OfficeCryptCodecHandler.Phase getPhase()

getDigest

protected org.bouncycastle.crypto.Digest getDigest()

initDigest

protected org.bouncycastle.crypto.Digest initDigest()

initPwdDigest

protected org.bouncycastle.crypto.Digest initPwdDigest()

initCryptDigest

protected org.bouncycastle.crypto.Digest initCryptDigest()

int2bytes

protected final byte[] int2bytes(int val)

reset

protected void reset()

decodePage

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

Throws:

IOException

encodePage

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

Throws:

IOException

iterateHash

protected byte[] iterateHash(byte[] baseHash,
                             int iterations)

bits2bytes

protected static int bits2bytes(int bits)

decodePageImpl

protected abstract void decodePageImpl(ByteBuffer inPage,
                                       ByteBuffer outPage,
                                       int pageNumber)
                                throws IOException

Throws:

IOException

encodePageImpl

protected abstract ByteBuffer encodePageImpl(ByteBuffer buffer,
                                             int pageNumber,
                                             int pageOffset)
                                      throws IOException

Throws:

IOException

verifyPassword

protected abstract boolean verifyPassword(byte[] pwdBytes)