eve.security

Class MD5

java.lang.Object

eve.security.MD5

public class MD5
extends Object

This class implements the "RSA Data Security, Inc. MD5 Message-Digest Algorithm
It has been ported from a public domain Java implementation (by Jon Howell) to Ewe by Tom Arn (www.t-arn.com)

To compute the message digest of a chunk of bytes, create an MD5 object 'md5', call md5.update() as needed on buffers full of bytes, and then call md5.digest(), which will fill a supplied 16-byte array with the digest. Get the digest with md5.getDigest() or md5.toString()

Since:

02.08.05 (version 1.0) - 14.05.07 (version 2.0)

Version:

2.0

Author:

Tom Arn, www.t-arn.com

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	aDigest
protected long	bits
protected int[]	buf
protected static int	DIGEST_SIZE
protected boolean	finalized
protected byte[]	in
protected int[]	inint
protected static String	stVersion

Constructor Summary

Constructors

Constructor and Description
MD5() Creates a new MD5 object.

Method Summary

Modifier and Type	Method and Description
void	digest() Completes the digest operation.
boolean	equals(byte[] otherDigest) Compares the message digest with another message digest.
byte[]	getDigest() Retrieves the digest.
static String	getVersion() Returns the version of the class.
void	reset() Initializes (or resets) the hasher for a new session.
String	toString() makes a (lower case) binhex string representation of the current digest.
void	update(byte newbyte) Adds a single byte to the digest.
void	update(byte[] newbuf) Adds a complete byte array to the digest.
void	update(byte[] newbuf, int length) Adds a portion of a byte array to the digest.
void	update(byte[] newbuf, int bufstart, int buflen) Adds a portion of a byte array to the digest.
void	update(File f) Adds a complete file to the digest.
void	update(String newstring) Adds a String to the digest.

Methods inherited from class java.lang.Object

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

Field Detail

stVersion

protected static String stVersion

buf

protected int[] buf

bits

protected long bits

in

protected byte[] in

inint

protected int[] inint

finalized

protected boolean finalized

DIGEST_SIZE

protected static final int DIGEST_SIZE

See Also:

Constant Field Values

aDigest

protected byte[] aDigest

Constructor Detail

MD5

public MD5()

Creates a new MD5 object.

Method Detail

getVersion

public static String getVersion()

Returns the version of the class.

Returns:

returns the version of the class

digest

public void digest()

Completes the digest operation. You can now fetch the digest using getDigest().

equals

public boolean equals(byte[] otherDigest)

Compares the message digest with another message digest.

Parameters:

otherDigest - another MD5 digest

Returns:

returns true if equal, false otherwise or if digest() has not been called.

getDigest

public byte[] getDigest()

Retrieves the digest.

Returns:

returns the message digest byte array.

reset

public void reset()

Initializes (or resets) the hasher for a new session.

toString

public String toString()

makes a (lower case) binhex string representation of the current digest.

Overrides:

toString in class Object

Returns:

the string representation.

update

public void update(byte newbyte)

Adds a single byte to the digest.

Parameters:

newbyte - the byte to add

update

public void update(byte[] newbuf)

Adds a complete byte array to the digest.

Parameters:

newbuf - the byte array to add

update

public void update(String newstring)

Adds a String to the digest. The String is converted to a byte array according to the default encoding format. Under a native Ewe VM this is UTF8 encoding.

Parameters:

newstring - the String to add

update

public void update(byte[] newbuf,
                   int length)

Adds a portion of a byte array to the digest.

Parameters:

newbuf - the data to add

length - the number of bytes to add from the beginning of the array

update

public void update(byte[] newbuf,
                   int bufstart,
                   int buflen)

Adds a portion of a byte array to the digest.

Parameters:

newbuf - the data to add

bufstart - the offset of the bytes in the data array.

buflen - the number of bytes to add

update

public void update(File f)
            throws IOException

Adds a complete file to the digest.

Parameters:

f - the File object representing the physical file

Throws:

IOException