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.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	OfficeCryptCodecHandler.Phase

Field Summary

Fields

Modifier and Type	Field and Description
private org.bouncycastle.crypto.Digest	_digest
private OfficeCryptCodecHandler.Phase	_phase
private java.nio.ByteBuffer	_tempIntBuf
private static int	CRYPT_STRUCTURE_OFFSET
private static int	MAX_PASSWORD_LEN

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

CIPHER_DECRYPT_MODE, CIPHER_ENCRYPT_MODE

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected static int	bits2bytes(int bits)
static com.healthmarketscience.jackcess.impl.CodecHandler	create(PasswordCallback callback, com.healthmarketscience.jackcess.impl.PageChannel channel, java.nio.charset.Charset charset)
void	decodePage(java.nio.ByteBuffer inPage, java.nio.ByteBuffer outPage, int pageNumber)
protected abstract void	decodePageImpl(java.nio.ByteBuffer inPage, java.nio.ByteBuffer outPage, int pageNumber)
java.nio.ByteBuffer	encodePage(java.nio.ByteBuffer buffer, int pageNumber, int pageOffset)
protected abstract java.nio.ByteBuffer	encodePageImpl(java.nio.ByteBuffer buffer, int pageNumber, int pageOffset)
protected org.bouncycastle.crypto.Digest	getDigest()
private static byte[]	getPasswordBytes(java.lang.String password)
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)
private static boolean	isEncryptedPage(int pageNumber)
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

Field Detail

MAX_PASSWORD_LEN

private static final int MAX_PASSWORD_LEN

See Also:

Constant Field Values

CRYPT_STRUCTURE_OFFSET

private static final int CRYPT_STRUCTURE_OFFSET

See Also:

Constant Field Values

_digest

private org.bouncycastle.crypto.Digest _digest

_tempIntBuf

private java.nio.ByteBuffer _tempIntBuf

_phase

private OfficeCryptCodecHandler.Phase _phase

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,
                                                                        java.nio.charset.Charset charset)
                                                                 throws java.io.IOException

Throws:

java.io.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(java.nio.ByteBuffer inPage,
                       java.nio.ByteBuffer outPage,
                       int pageNumber)
                throws java.io.IOException

Throws:

java.io.IOException

encodePage

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

Throws:

java.io.IOException

iterateHash

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

isEncryptedPage

private static boolean isEncryptedPage(int pageNumber)

getPasswordBytes

private static byte[] getPasswordBytes(java.lang.String password)

bits2bytes

protected static int bits2bytes(int bits)

decodePageImpl

protected abstract void decodePageImpl(java.nio.ByteBuffer inPage,
                                       java.nio.ByteBuffer outPage,
                                       int pageNumber)
                                throws java.io.IOException

Throws:

java.io.IOException

encodePageImpl

protected abstract java.nio.ByteBuffer encodePageImpl(java.nio.ByteBuffer buffer,
                                                      int pageNumber,
                                                      int pageOffset)
                                               throws java.io.IOException

Throws:

java.io.IOException

verifyPassword

protected abstract boolean verifyPassword(byte[] pwdBytes)