iaik.security.elgamal

Class ElGamalKeyPairGenerator

java.lang.Object

java.security.KeyPairGeneratorSpi

java.security.KeyPairGenerator

iaik.security.elgamal.ElGamalKeyPairGenerator

public final class ElGamalKeyPairGenerator
extends java.security.KeyPairGenerator

ElGamal keypair generator class.

Constructor Summary

Constructors

Constructor and Description
ElGamalKeyPairGenerator() Default constructor.

Method Summary

Methods

Modifier and Type	Method and Description
java.security.KeyPair	generateKeyPair() Actually generates the requested DH KeyPair.
void	initialize(java.security.spec.AlgorithmParameterSpec params)
void	initialize(java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random) Initializes this ElGamalKeyPairGenerator with given ElGamal parameter specification and random seed.
void	initialize(int keysize) Initializes the ElGamalKeyPairGenerator for given prime modulus length.
void	initialize(int keysize, java.security.SecureRandom random) Initializes the ElGamalKeyPairGenerator for given prime modulus length with the given random seed.

Methods inherited from class java.security.KeyPairGenerator

genKeyPair, getAlgorithm, getInstance, getInstance, getInstance, getProvider

Methods inherited from class java.lang.Object

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

Constructor Detail

ElGamalKeyPairGenerator

public ElGamalKeyPairGenerator()

Default constructor.

Method Detail

initialize

public void initialize(int keysize)

Initializes the ElGamalKeyPairGenerator for given prime modulus length.

Overrides:

initialize in class java.security.KeyPairGenerator

Parameters:

keysize - the length of the prime modulus in bits

initialize

public void initialize(int keysize,
              java.security.SecureRandom random)

Initializes the ElGamalKeyPairGenerator for given prime modulus length with the given random seed.

Overrides:

initialize in class java.security.KeyPairGenerator

Parameters:

keysize - the length of the prime modulus in bits

random - the random seed as SecureRandom.

initialize

public void initialize(java.security.spec.AlgorithmParameterSpec params)
                throws java.security.InvalidAlgorithmParameterException

Overrides:

initialize in class java.security.KeyPairGenerator

Throws:

java.security.InvalidAlgorithmParameterException

initialize

public void initialize(java.security.spec.AlgorithmParameterSpec params,
              java.security.SecureRandom random)
                throws java.security.InvalidAlgorithmParameterException

Initializes this ElGamalKeyPairGenerator with given ElGamal parameter specification and random seed.

Overrides:

initialize in class java.security.KeyPairGenerator

Parameters:

params - the ElGamalParameterSpec representing prime modulus p, base generator g, and exponent length l

random - the random seed as SecureRandom

Throws:

java.security.InvalidParameterException - if the given algorithm parameter specification is not a ElGamalParameterSpec or the size of the exponent is not shorter than that of the prime modulus, both derived from the given DH parameter specification

java.security.InvalidAlgorithmParameterException

generateKeyPair

public java.security.KeyPair generateKeyPair()

Actually generates the requested DH KeyPair.

Overrides:

generateKeyPair in class java.security.KeyPairGenerator

Returns:

the requested key pair