org.gudy.bouncycastle.crypto.agreement.srp
Class SRP6VerifierGenerator

java.lang.Object
  org.gudy.bouncycastle.crypto.agreement.srp.SRP6VerifierGenerator

public class SRP6VerifierGenerator
extends Object

Generates new SRP verifier for user

Field Summary

protected Digest	digest
protected BigInteger	g
protected BigInteger	N

Constructor Summary

SRP6VerifierGenerator()

Method Summary

BigInteger	generateVerifier(byte[] salt, byte[] identity, byte[] password) Creates a new SRP verifier
void	init(BigInteger N, BigInteger g, Digest digest) Initialises generator to create new verifiers

Methods inherited from class java.lang.Object

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

Field Detail

N

protected BigInteger N

g

protected BigInteger g

digest

protected Digest digest

Constructor Detail

SRP6VerifierGenerator

public SRP6VerifierGenerator()

Method Detail

init

public void init(BigInteger N,
                 BigInteger g,
                 Digest digest)

Initialises generator to create new verifiers

Parameters:

N - The safe prime to use (see DHParametersGenerator)

g - The group parameter to use (see DHParametersGenerator)

digest - The digest to use. The same digest type will need to be used later for the actual authentication attempt. Also note that the final session key size is dependent on the chosen digest.

generateVerifier

public BigInteger generateVerifier(byte[] salt,
                                   byte[] identity,
                                   byte[] password)

Creates a new SRP verifier

Parameters:

salt - The salt to use, generally should be large and random

identity - The user's identifying information (eg. username)

password - The user's password

Returns:

A new verifier for use in future SRP authentication