gnu.crypto.jce.hash

Class MessageDigestAdapter

Implemented Interfaces:
Cloneable
Known Direct Subclasses:
HavalSpi, MD2Spi, MD4Spi, MD5Spi, RipeMD128Spi, RipeMD160Spi, Sha160Spi, Sha256Spi, Sha384Spi, Sha512Spi, TigerSpi, WhirlpoolSpi

(package private) class MessageDigestAdapter
extends MessageDigestSpi
implements 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

MessageDigestAdapter(String mdName)
Trivial protected constructor.

Method Summary

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)

Constructor Details

MessageDigestAdapter

protected MessageDigestAdapter(String mdName)
Trivial protected constructor.
Parameters:
mdName - the canonical name of the hash algorithm.

Method Details

clone

public Object clone()

engineDigest

public byte[] engineDigest()

engineDigest

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

engineGetDigestLength

public int engineGetDigestLength()

engineReset

public void engineReset()

engineUpdate

public void engineUpdate(byte input)

engineUpdate

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

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