Package org.bouncycastle.crypto.digests

Class 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!

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      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 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

      • 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

      • 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.