org.bouncycastle.crypto.digests
Class GeneralDigest

java.lang.Object
  extended by org.bouncycastle.crypto.digests.GeneralDigest
All Implemented Interfaces:
Digest
Direct Known Subclasses:
MD5Digest

public abstract class GeneralDigest
extends java.lang.Object
implements Digest

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


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
 

Constructor Detail

GeneralDigest

protected GeneralDigest()
Standard constructor


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: Digest
update the message digest with a single byte.

Specified by:
update in interface Digest
Parameters:
in - the input byte to be entered.

update

public void update(byte[] in,
                   int inOff,
                   int len)
Description copied from interface: Digest
update the message digest with a block of bytes.

Specified by:
update in interface Digest
Parameters:
in - the byte array containing the data.
inOff - the offset into the byte array where the data starts.
len - the length of the data.

finish

public void finish()

reset

public void reset()
Description copied from interface: Digest
reset the digest back to it's initial state.

Specified by:
reset in interface Digest

processWord

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

processLength

protected abstract void processLength(long bitLength)

processBlock

protected abstract void processBlock()