com.ibm.crypto.provider
Class DHKeyPairGenerator

java.lang.Object
  java.security.KeyPairGeneratorSpi
      com.ibm.crypto.provider.DHKeyPairGenerator

public final class DHKeyPairGenerator

extends KeyPairGeneratorSpi

This class represents the key pair generator for Diffie-Hellman key pairs.

This key pair generator may be initialized in two different ways:

• By providing the size in bits of the prime modulus. This will be used to create a prime modulus and base generator, which will then be used to create the Diffie-Hellman key pair. The default size of the prime modulus is 1024 bits.
• By providing a prime modulus and base generator.

See Also:

KeyPairGenerator

Constructor Summary

DHKeyPairGenerator()

Method Summary

KeyPair	generateKeyPair() Generates a key pair.
void	initialize(AlgorithmParameterSpec params, SecureRandom random) Initializes this key pair generator for the specified parameter set and source of randomness.
void	initialize(int keysize, SecureRandom random) Initializes this key pair generator for a certain keysize and source of randomness.

Methods inherited from class java.lang.Object

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

Constructor Detail

DHKeyPairGenerator

public DHKeyPairGenerator()

Method Detail

initialize

public void initialize(int keysize,
                       SecureRandom random)

Initializes this key pair generator for a certain keysize and source of randomness. The keysize is specified as the size in bits of the prime modulus.

Parameters:

keysize - the keysize (size of prime modulus) in bits

random - the source of randomness

initialize

public void initialize(AlgorithmParameterSpec params,
                       SecureRandom random)
                throws InvalidAlgorithmParameterException

Initializes this key pair generator for the specified parameter set and source of randomness.

The given parameter set contains the prime modulus, the base generator, and optionally the requested size in bits of the random exponent (private value).

Parameters:

params - the parameter set used to generate the key pair

random - the source of randomness w

Throws:

InvalidAlgorithmParameterException - if the given parameters are inappropriate for this key pair generator

generateKeyPair

public KeyPair generateKeyPair()

Generates a key pair.

Returns:

the new key pair