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org.bouncycastle.crypto.digests
Class GeneralDigest  

java.lang.Object
  org.bouncycastle.crypto.digests.GeneralDigest

All Implemented Interfaces:

org.bouncycastle.crypto.Digest

Direct Known Subclasses:

MD5Digest

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public abstract class GeneralDigest

extends java.lang.Object

implements org.bouncycastle.crypto.Digest

base implementation of MD4 family style digest as outlined in "Handbook of Applied Cryptography", pages 344 - 347.

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Field Summary
private  long	byteCount
private  byte[]	xBuf
private  int	xBufOff

 

Constructor Summary
protected	GeneralDigest()           Standard constructor
protected	GeneralDigest(GeneralDigest t)           Copy constructor.

 

Method Summary
void	finish()
protected abstract  void	processBlock()
protected abstract  void	processLength(long bitLength)
protected abstract  void	processWord(byte[] in, int inOff)
void	reset()           reset the digest back to it's initial state.
void	update(byte in)           update the message digest with a single byte.
void	update(byte[] in, int inOff, int len)           update the message digest with a block of bytes.

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Methods inherited from interface org.bouncycastle.crypto.Digest

doFinal, getAlgorithmName, getDigestSize

 

Field Detail

xBuf

private byte[] xBuf

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xBufOff

private int xBufOff

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byteCount

private long byteCount

Constructor Detail

GeneralDigest

protected GeneralDigest()

Standard constructor

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GeneralDigest

protected GeneralDigest(GeneralDigest t)

Copy constructor. We are using copy constructors in place of the Object.clone() interface as this interface is not supported by J2ME.

Method Detail

update

public void update(byte in)

Description copied from interface: org.bouncycastle.crypto.Digest

update the message digest with a single byte.

Specified by:

update in interface org.bouncycastle.crypto.Digest

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update

public void update(byte[] in,
                   int inOff,
                   int len)

Description copied from interface: org.bouncycastle.crypto.Digest

update the message digest with a block of bytes.

Specified by:

update in interface org.bouncycastle.crypto.Digest

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finish

public void finish()

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reset

public void reset()

Description copied from interface: org.bouncycastle.crypto.Digest

reset the digest back to it's initial state.

Specified by:

reset in interface org.bouncycastle.crypto.Digest

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processWord

protected abstract void processWord(byte[] in,
                                    int inOff)

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processLength

protected abstract void processLength(long bitLength)

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processBlock

protected abstract void processBlock()

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