com.healthmarketscience.jackcess.impl.office

Class OfficeBinaryDocRC4Provider

java.lang.Object

com.healthmarketscience.jackcess.impl.BaseCryptCodecHandler

com.healthmarketscience.jackcess.impl.OfficeCryptCodecHandler

com.healthmarketscience.jackcess.impl.office.StreamCipherProvider

com.healthmarketscience.jackcess.impl.office.OfficeBinaryDocRC4Provider

All Implemented Interfaces:

com.healthmarketscience.jackcess.impl.CodecHandler

public class OfficeBinaryDocRC4Provider
extends StreamCipherProvider

Nested Class Summary

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

OfficeCryptCodecHandler.Phase

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	_baseHash
private byte[]	_encVerifier
private byte[]	_encVerifierHash

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

CIPHER_DECRYPT_MODE, CIPHER_ENCRYPT_MODE

Constructor Summary

Constructors

Constructor and Description
OfficeBinaryDocRC4Provider(com.healthmarketscience.jackcess.impl.PageChannel channel, byte[] encodingKey, java.nio.ByteBuffer encProvBuf, byte[] pwdBytes)

Method Summary

Modifier and Type	Method and Description
boolean	canEncodePartialPage()
protected org.bouncycastle.crypto.params.KeyParameter	computeCipherParams(int pageNumber) Generates the cipher parameters for the given page number.
private org.bouncycastle.crypto.params.KeyParameter	computeEncryptionKey(byte[] blockBytes)
protected StreamCipherCompat	initCipher()
protected org.bouncycastle.crypto.Digest	initDigest()
protected boolean	verifyPassword(byte[] pwdBytes)

Methods inherited from class com.healthmarketscience.jackcess.impl.office.StreamCipherProvider

canDecodeInline, decodePageImpl, encodePageImpl, getStreamCipher, reset

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

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

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

applyPageNumber, blockDecrypt, blockDecryptBytes, blockEncrypt, 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

_encVerifier

private final byte[] _encVerifier

_encVerifierHash

private final byte[] _encVerifierHash

_baseHash

private final byte[] _baseHash

Constructor Detail

OfficeBinaryDocRC4Provider

public OfficeBinaryDocRC4Provider(com.healthmarketscience.jackcess.impl.PageChannel channel,
                                  byte[] encodingKey,
                                  java.nio.ByteBuffer encProvBuf,
                                  byte[] pwdBytes)

Method Detail

canEncodePartialPage

public boolean canEncodePartialPage()

initDigest

protected org.bouncycastle.crypto.Digest initDigest()

Overrides:

initDigest in class OfficeCryptCodecHandler

initCipher

protected StreamCipherCompat initCipher()

Overrides:

initCipher in class StreamCipherProvider

computeCipherParams

protected org.bouncycastle.crypto.params.KeyParameter computeCipherParams(int pageNumber)

Description copied from class: BaseCryptCodecHandler

Generates the cipher parameters for the given page number.

Specified by:

computeCipherParams in class BaseCryptCodecHandler

computeEncryptionKey

private org.bouncycastle.crypto.params.KeyParameter computeEncryptionKey(byte[] blockBytes)

verifyPassword

protected boolean verifyPassword(byte[] pwdBytes)

Specified by:

verifyPassword in class OfficeCryptCodecHandler