org.mozilla.jss.netscape.security.provider

Class MD5

java.lang.Object

java.security.MessageDigestSpi

org.mozilla.jss.netscape.security.provider.MD5

All Implemented Interfaces:

java.lang.Cloneable

public final class MD5
extends java.security.MessageDigestSpi
implements java.lang.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

Constructors

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

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone()
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 state information and reset the bit count to 0.

Methods inherited from class java.security.MessageDigestSpi

engineUpdate

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 state information and reset the bit count to 0. Given this implementation you are constrained to counting 2^64 bits.

engineReset

protected void engineReset()

Specified by:

engineReset in class java.security.MessageDigestSpi

engineGetDigestLength

protected int engineGetDigestLength()

Return the digest length in bytes

Overrides:

engineGetDigestLength in class java.security.MessageDigestSpi

engineUpdate

protected void engineUpdate(byte b)

Update adds the passed byte to the digested data.

Specified by:

engineUpdate in class java.security.MessageDigestSpi

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.

Specified by:

engineUpdate in class java.security.MessageDigestSpi

engineDigest

protected byte[] engineDigest()

Specified by:

engineDigest in class java.security.MessageDigestSpi

engineDigest

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

Overrides:

engineDigest in class java.security.MessageDigestSpi

Throws:

java.security.DigestException

clone

public java.lang.Object clone()

Overrides:

clone in class java.security.MessageDigestSpi