org.bouncycastle.crypto.digests
Class MD5Digest

java.lang.Object
  |
  +--org.bouncycastle.crypto.digests.GeneralDigest
        |
        +--org.bouncycastle.crypto.digests.MD5Digest

All Implemented Interfaces:

Digest, EncodableDigest, ExtendedDigest, Memoable

public class MD5Digest

extends GeneralDigest

implements EncodableDigest

implementation of MD5 as outlined in "Handbook of Applied Cryptography", pages 346 - 347.

Fields inherited from class org.bouncycastle.crypto.digests.GeneralDigest

purpose

Constructor Summary

MD5Digest()
Standard constructor

MD5Digest(byte[] encodedState)

MD5Digest(CryptoServicePurpose purpose)

MD5Digest(MD5Digest t)
Copy constructor.

Method Summary

Memoable	copy() Produce a copy of this object with its configuration and in its current state.
protected CryptoServiceProperties	cryptoServiceProperties()
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.
byte[]	getEncodedState() Return an encoded byte array for the digest's internal state
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, populateState, update, update

Methods inherited from class java.lang.Object

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

Constructor Detail

MD5Digest

public MD5Digest()

Standard constructor

MD5Digest

public MD5Digest(CryptoServicePurpose purpose)

MD5Digest

public MD5Digest(byte[] encodedState)

MD5Digest

public MD5Digest(MD5Digest 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

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

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.

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

Returns:

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

processWord

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

Overrides:

processWord in class GeneralDigest

processLength

protected void processLength(long bitLength)

Overrides:

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.

Following copied from interface: org.bouncycastle.crypto.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 chaining variables to the IV values.

Overrides:

reset in class GeneralDigest

processBlock

protected void processBlock()

Overrides:

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.

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.

getEncodedState

public byte[] getEncodedState()

Description copied from interface: EncodableDigest

Return an encoded byte array for the digest's internal state

Specified by:

getEncodedState in interface EncodableDigest

Following copied from interface: org.bouncycastle.crypto.digests.EncodableDigest

Returns:

an encoding of the digests internal state.

cryptoServiceProperties

protected CryptoServiceProperties cryptoServiceProperties()

Overrides:

cryptoServiceProperties in class GeneralDigest