gnu.crypto.prng
Class PBKDF2

java.lang.Object
  gnu.crypto.prng.BasePRNG
      gnu.crypto.prng.PBKDF2

All Implemented Interfaces:

java.lang.Cloneable, IRandom

public class PBKDF2

extends BasePRNG

implements java.lang.Cloneable

An implementation of the key derivation function KDF2 from PKCS #5: Password-Based Cryptography (PBE). This KDF is essentially a way to transform a password and a salt into a stream of random bytes, which may then be used to initialize a cipher or a MAC.

This version uses a MAC as its pseudo-random function, and the password is used as the key.

References:

1. B. Kaliski, RFC 2898: Password-Based Cryptography Specification, Version 2.0

Version:

$Revision: 1.2 $

Field Summary

Fields inherited from class gnu.crypto.prng.BasePRNG

buffer, initialised, name, ndx

Constructor Summary

PBKDF2(IMac mac)
Creates a new PBKDF2 object.

Method Summary

java.lang.Object	clone() Returns a clone copy of this instance.
void	fillBlock()
void	setup(java.util.Map attributes)

Methods inherited from class gnu.crypto.prng.BasePRNG

init, isInitialised, name, nextByte, nextBytes

Methods inherited from class java.lang.Object

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

Constructor Detail

PBKDF2

public PBKDF2(IMac mac)

Creates a new PBKDF2 object. The argument is the MAC that will serve as the pseudo-random function. The MAC does not need to be initialized.

Parameters:

mac - The pseudo-random function.

Method Detail

clone

public java.lang.Object clone()

Description copied from interface: IRandom

Returns a clone copy of this instance.

Specified by:

clone in interface IRandom

Specified by:

clone in class BasePRNG

setup

public void setup(java.util.Map attributes)

Specified by:

setup in class BasePRNG

fillBlock

public void fillBlock()
               throws LimitReachedException

Specified by:

fillBlock in class BasePRNG

Throws:

LimitReachedException