gnu.crypto.sasl.srp
Class KDF

java.lang.Object
  gnu.crypto.sasl.srp.KDF

public class KDF

extends java.lang.Object

The SASL-SRP KDF implementation, which is also used, depending on how it was instantiated, as a secure Pseudo Random Number Generator.

Version:

$Revision: 1.3 $

Method Summary

byte[]	derive(int length) Returns a designated number of bytes suitable for use in the SASL SRP mechanism.
(package private) static KDF	getInstance(byte[] K) A Factory mehod that returns an instance of a KDF based on supplied seed data.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

static final KDF getInstance(byte[] K)

A Factory mehod that returns an instance of a KDF based on supplied seed data.

Parameters:

K - the SASL SRP shared secret for a KDF to be used for CALG and IALG setup. null otherwise.

Returns:

an instance of a KDF.

derive

public byte[] derive(int length)

Returns a designated number of bytes suitable for use in the SASL SRP mechanism.

Parameters:

length - the number of bytes needed.

Returns:

a byte array containing the generated/selected bytes.