org.bouncycastle.crypto.agreement.srp
Class SRP6VerifierGenerator

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

public class SRP6VerifierGenerator

extends java.lang.Object

Generates new SRP verifier for user

Field Summary

protected Digest	digest
protected java.math.BigInteger	g
protected java.math.BigInteger	N
protected java.security.SecureRandom	random

Constructor Summary

SRP6VerifierGenerator()

Method Summary

java.math.BigInteger	generateVerifier(byte[] salt, byte[] identity, byte[] password) Creates a new SRP verifier
void	init(java.math.BigInteger N, java.math.BigInteger g, Digest digest) Initialises generator to create new verifiers
void	init(java.math.BigInteger N, java.math.BigInteger g, Digest digest, java.security.SecureRandom random) Initialises generator to create new verifiers
void	init(SRP6GroupParameters group, Digest digest)
void	init(SRP6GroupParameters group, Digest digest, java.security.SecureRandom random)

Methods inherited from class java.lang.Object

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

Field Detail

N

protected java.math.BigInteger N

g

protected java.math.BigInteger g

digest

protected Digest digest

random

protected java.security.SecureRandom random

Constructor Detail

SRP6VerifierGenerator

public SRP6VerifierGenerator()

Method Detail

init

public void init(java.math.BigInteger N,
                 java.math.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.

init

public void init(java.math.BigInteger N,
                 java.math.BigInteger g,
                 Digest digest,
                 java.security.SecureRandom random)

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.

random - The source used to randomise the private exponent before it is raised, may be null to take the default from CryptoServicesRegistrar.

init

public void init(SRP6GroupParameters group,
                 Digest digest)

init

public void init(SRP6GroupParameters group,
                 Digest digest,
                 java.security.SecureRandom random)

generateVerifier

public java.math.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