org.bouncycastle.crypto.digests
Class MD2Digest

java.lang.Object
  |
  +--org.bouncycastle.crypto.digests.MD2Digest

All Implemented Interfaces:

Digest, ExtendedDigest, Memoable

public class MD2Digest

extends java.lang.Object

implements ExtendedDigest, Memoable

implementation of MD2 as outlined in RFC1319 by B.Kaliski from RSA Laboratories April 1992

Constructor Summary

MD2Digest()

MD2Digest(CryptoServicePurpose purpose)

MD2Digest(MD2Digest t)

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	getByteLength() Return the size in bytes of the internal buffer the digest applies it's compression function to.
int	getDigestSize() return the size, in bytes, of the digest produced by this message digest.
protected void	processBlock(byte[] m)
protected void	processCheckSum(byte[] m)
void	reset() reset the digest back to it's initial state.
void	reset(Memoable other) Restore a copied object state into this object.
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

Constructor Detail

MD2Digest

public MD2Digest()

MD2Digest

public MD2Digest(CryptoServicePurpose purpose)

MD2Digest

public MD2Digest(MD2Digest t)

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()

return the algorithm name

Specified by:

getAlgorithmName in interface Digest

Returns:

the algorithm name

getDigestSize

public int getDigestSize()

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

Specified by:

getDigestSize in interface Digest

Returns:

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

doFinal

public int doFinal(byte[] out,
                   int outOff)

close the digest, producing the final digest value. The doFinal call leaves the digest reset.

Specified by:

doFinal in interface Digest

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 digest back to it's initial state.

Specified by:

reset in interface Digest

update

public void update(byte in)

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)

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.

processCheckSum

protected void processCheckSum(byte[] m)

processBlock

protected void processBlock(byte[] m)

getByteLength

public int getByteLength()

Description copied from interface: ExtendedDigest

Return the size in bytes of the internal buffer the digest applies it's compression function to.

Specified by:

getByteLength in interface ExtendedDigest

Following copied from interface: org.bouncycastle.crypto.ExtendedDigest

Returns:

byte length of the digests internal buffer.

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.

Specified by:

copy in interface Memoable

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.

Specified by:

reset in interface Memoable

Following copied from interface: org.bouncycastle.util.Memoable

Parameters:

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

Throws:

java.lang.ClassCastException - if the provided object is not of the correct type.

MemoableResetException - if the other parameter is in some other way invalid.