Bouncy Castle Cryptography Library 1.49

org.bouncycastle.crypto.digests
Class MD4Digest

java.lang.Object
  extended by org.bouncycastle.crypto.digests.GeneralDigest
      extended by org.bouncycastle.crypto.digests.MD4Digest
All Implemented Interfaces:
Digest, ExtendedDigest, Memoable

public class MD4Digest
extends GeneralDigest

implementation of MD4 as RFC 1320 by R. Rivest, MIT Laboratory for Computer Science and RSA Data Security, Inc.

NOTE: This algorithm is only included for backwards compatability with legacy applications, it's not secure, don't use it for anything new!


Constructor Summary
MD4Digest()
          Standard constructor
MD4Digest(MD4Digest t)
          Copy constructor.
 
Method Summary
 Memoable copy()
          Produce a copy of this object with its configuration and in its current state.
 int doFinal(byte[] out, int outOff)
          close the digest, producing the final digest value.
 java.lang.String getAlgorithmName()
          return the algorithm name
 int getDigestSize()
          return the size, in bytes, of the digest produced by this message digest.
protected  void processBlock()
           
protected  void processLength(long bitLength)
           
protected  void processWord(byte[] in, int inOff)
           
 void reset()
          reset the chaining variables to the IV values.
 void reset(Memoable other)
          Restore a copied object state into this object.
 
Methods inherited from class org.bouncycastle.crypto.digests.GeneralDigest
copyIn, finish, getByteLength, update, update
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

MD4Digest

public MD4Digest()
Standard constructor


MD4Digest

public MD4Digest(MD4Digest t)
Copy constructor. This will copy the state of the provided message digest.

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()
Description copied from interface: Digest
return the algorithm name

Returns:
the algorithm name

getDigestSize

public int getDigestSize()
Description copied from interface: Digest
return the size, in bytes, of the digest produced by this message digest.

Returns:
the size, in bytes, of the digest produced by this message digest.

processWord

protected void processWord(byte[] in,
                           int inOff)
Specified by:
processWord in class GeneralDigest

processLength

protected void processLength(long bitLength)
Specified by:
processLength in class GeneralDigest

doFinal

public int doFinal(byte[] out,
                   int outOff)
Description copied from interface: Digest
close the digest, producing the final digest value. The doFinal call leaves the digest reset.

Parameters:
out - the array the digest is to be copied into.
outOff - the offset into the out array the digest is to start at.

reset

public void reset()
reset the chaining variables to the IV values.

Specified by:
reset in interface Digest
Overrides:
reset in class GeneralDigest

processBlock

protected void processBlock()
Specified by:
processBlock in class GeneralDigest

copy

public Memoable copy()
Description copied from interface: Memoable
Produce a copy of this object with its configuration and in its current state.

The returned object may be used simply to store the state, or may be used as a similar object starting from the copied state.


reset

public void reset(Memoable other)
Description copied from interface: Memoable
Restore a copied object state into this object.

Implementations of this method should try to avoid or minimise memory allocation to perform the reset.

Parameters:
other - an object originally copied from an object of the same type as this instance.

Bouncy Castle Cryptography Library 1.49