de.flexiprovider.core.md
Class Tiger

java.lang.Object
  |
  +--java.security.MessageDigestSpi
        |
        +--de.flexiprovider.api.MessageDigest
              |
              +--de.flexiprovider.core.md.Tiger

public final class Tiger

extends MessageDigest

Tiger is a fast new hash function, by Ross Anderson and Eli Biham. This class is a simple Java implementation of the 192-bit Tiger algorithm, based on the sample C code published by Eli Biham on http://www.cs.technion.ac.il/~biham/Reports/Tiger/ in its HTML reference Appendix.

It computes a 192-bit digest that is considered stronger, but faster to compute than 160-bit SHA-1. Its input is a set of 64-bytes blocks. The last block of a digested message must include a required padded byte which must be 0x01.

Author:

Elena Klintsevitch

Field Summary

static java.lang.String	ALG_NAME The algorithm name.
static java.lang.String	OID The OID of Tiger (defined by the GNU project, see http://www.gnupg.org/oids.html).

Constructor Summary

Tiger()
constructor for a new Tiger message digest

Method Summary

byte[]	digest() Compute the digest and reset the engine
int	getDigestLength()
void	reset() reset the engine to its initial state
void	update(byte b) Update the engine with the specified byte.
void	update(byte[] bytes, int offset, int len) Update the engine with the specified byte array.

Methods inherited from class de.flexiprovider.api.MessageDigest

digest, digest, engineDigest, engineGetDigestLength, engineReset, engineUpdate, engineUpdate, update

Methods inherited from class java.security.MessageDigestSpi

clone, engineDigest

Methods inherited from class java.lang.Object

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

Field Detail

ALG_NAME

public static final java.lang.String ALG_NAME

The algorithm name.

OID

public static final java.lang.String OID

The OID of Tiger (defined by the GNU project, see http://www.gnupg.org/oids.html).

Constructor Detail

Tiger

public Tiger()

constructor for a new Tiger message digest

Method Detail

getDigestLength

public int getDigestLength()

Overrides:

getDigestLength in class MessageDigest

Returns:

the digest length in bytes

update

public void update(byte b)

Update the engine with the specified byte.

Overrides:

update in class MessageDigest

Parameters:

b - the input byte

update

public void update(byte[] bytes,
                   int offset,
                   int len)

Update the engine with the specified byte array.

Overrides:

update in class MessageDigest

Parameters:

bytes - the input

offset - the offset where the input starts

len - the input length

digest

public byte[] digest()

Compute the digest and reset the engine

Overrides:

digest in class MessageDigest

Returns:

the message digest in a byte array

reset

public void reset()

reset the engine to its initial state

Overrides:

reset in class MessageDigest