com.ibm.crypto.fips.provider

Class DHKeyPairGenerator

java.lang.Object

java.security.KeyPairGeneratorSpi

com.ibm.crypto.fips.provider.DHKeyPairGenerator

public final class DHKeyPairGenerator
extends java.security.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 2048 bits.
• By providing a prime modulus and base generator.

See Also:

KeyPairGenerator

Constructor Summary

Constructors

Constructor and Description
DHKeyPairGenerator()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	finalize() This function resets the class variables.
java.security.KeyPair	generateKeyPair() Generates a key pair.
void	initialize(java.security.spec.AlgorithmParameterSpec algParams, java.security.SecureRandom random) Initializes this key pair generator for the specified parameter set and source of randomness.
void	initialize(int keysize, java.security.SecureRandom random) Initializes this key pair generator for a certain keysize and source of randomness.
protected java.security.KeyPair	internalGenerateKeyPair() Generates a key pair.
protected void	internalInitialize(java.security.spec.AlgorithmParameterSpec algParams, java.security.SecureRandom random) Initializes this key pair generator for the specified parameter set and source of randomness.
protected void	internalInitialize(int keysize, java.security.SecureRandom random) Initializes this key pair generator for a certain keysize and source of randomness.

Methods inherited from class java.lang.Object

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

Constructor Detail

DHKeyPairGenerator

public DHKeyPairGenerator()

Method Detail

initialize

public void initialize(int keysize,
              java.security.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.

Specified by:

initialize in class java.security.KeyPairGeneratorSpi

Parameters:

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

random - the source of randomness

internalInitialize

protected void internalInitialize(int keysize,
                      java.security.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(java.security.spec.AlgorithmParameterSpec algParams,
              java.security.SecureRandom random)
                throws java.security.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).

Overrides:

initialize in class java.security.KeyPairGeneratorSpi

Parameters:

params - the parameter set used to generate the key pair

random - the source of randomness

Throws:

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

internalInitialize

protected void internalInitialize(java.security.spec.AlgorithmParameterSpec algParams,
                      java.security.SecureRandom random)
                           throws java.security.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

Throws:

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

generateKeyPair

public java.security.KeyPair generateKeyPair()

Generates a key pair.

Specified by:

generateKeyPair in class java.security.KeyPairGeneratorSpi

Returns:

the new key pair

internalGenerateKeyPair

protected java.security.KeyPair internalGenerateKeyPair()

Generates a key pair.

Returns:

the new key pair

finalize

protected void finalize()

This function resets the class variables.

Overrides:

finalize in class java.lang.Object