gnu.crypto.jce.hash
Class MessageDigestAdapter

java.lang.Object
  java.security.MessageDigestSpi
      gnu.crypto.jce.hash.MessageDigestAdapter

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

HavalSpi, MD2Spi, MD4Spi, MD5Spi, RipeMD128Spi, RipeMD160Spi, Sha160Spi, Sha256Spi, Sha384Spi, Sha512Spi, TigerSpi, WhirlpoolSpi

class MessageDigestAdapter

extends java.security.MessageDigestSpi

implements java.lang.Cloneable

The implementation of a generic MessageDigest adapter class to wrap gnu.crypto hash instances.

This class defines the Service Provider Interface (SPI) for the MessageDigest class, which provides the functionality of a message digest algorithm, such as MD5 or SHA. Message digests are secure one-way hash functions that take arbitrary-sized data and output a fixed- length hash value.

All the abstract methods in the MessageDigestSpi class are implemented by this class and all its sub-classes.

All the implementations which subclass this object, and which are serviced by the GNU Crypto provider implement the Cloneable interface.

Version:

$Revision: 1.2 $

Constructor Summary

protected

MessageDigestAdapter(java.lang.String mdName) Trivial protected constructor.

Method Summary

java.lang.Object	clone()
byte[]	engineDigest()
int	engineDigest(byte[] buf, int offset, int len)
int	engineGetDigestLength()
void	engineReset()
void	engineUpdate(byte input)
void	engineUpdate(byte[] input, int offset, int len)

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageDigestAdapter

protected MessageDigestAdapter(java.lang.String mdName)

Trivial protected constructor.

Parameters:

mdName - the canonical name of the hash algorithm.

Method Detail

clone

public java.lang.Object clone()

engineGetDigestLength

public int engineGetDigestLength()

engineUpdate

public void engineUpdate(byte input)

engineUpdate

public void engineUpdate(byte[] input,
                         int offset,
                         int len)

engineDigest

public byte[] engineDigest()

engineDigest

public int engineDigest(byte[] buf,
                        int offset,
                        int len)
                 throws java.security.DigestException

Throws:

java.security.DigestException

engineReset

public void engineReset()