com.ibm.crypto.provider
Class MD5

java.lang.Object
  java.security.MessageDigestSpi
      com.ibm.crypto.provider.MD5

All Implemented Interfaces:

Cloneable

public final class MD5

extends MessageDigestSpi

implements Cloneable

The MD5 class is used to compute an MD5 message digest over a given buffer of bytes. It is an implementation of the RSA Data Security Inc. MD5 algorithim as described in internet RFC 1321.

Constructor Summary

MD5()
Standard constructor, creates a new MD5 instance, allocates its buffers from the heap.

Method Summary

Object	clone() Clones this object.
protected byte[]	engineDigest()
protected int	engineDigest(byte[] buf, int offset, int len)
protected int	engineGetDigestLength() Return the digest length in bytes
protected void	engineReset()
protected void	engineUpdate(byte b) Update adds the passed byte to the digested data.
protected void	engineUpdate(byte[] input, int offset, int len) Update adds the selected part of an array of bytes to the digest.
void	init() Initialize the MD5 information

Methods inherited from class java.lang.Object

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

Constructor Detail

MD5

public MD5()

Standard constructor, creates a new MD5 instance, allocates its buffers from the heap.

Method Detail

init

public void init()

Initialize the MD5 information

engineReset

protected void engineReset()

engineGetDigestLength

protected int engineGetDigestLength()

Return the digest length in bytes

engineUpdate

protected void engineUpdate(byte b)

Update adds the passed byte to the digested data.

engineUpdate

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

Update adds the selected part of an array of bytes to the digest. This version is more efficient than the byte-at-a-time version; it avoids data copies and reduces per-byte call overhead.

engineDigest

protected byte[] engineDigest()

engineDigest

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

Throws:

DigestException

clone

public Object clone()

Clones this object.