Module ibm.crypto.ibmjcehybrid

Package com.ibm.crypto.ibmjcehybrid.provider

Class DiffieHellmanKeyPairGeneratorHybrid

java.lang.Object

java.security.KeyPairGeneratorSpi

java.security.KeyPairGenerator

com.ibm.crypto.ibmjcehybrid.provider.DiffieHellmanKeyPairGeneratorHybrid

public final class DiffieHellmanKeyPairGeneratorHybrid
extends KeyPairGenerator

This class is a facade for the generator of 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.

Field Summary

Fields

Modifier and Type	Field	Description
protected static com.ibm.misc.Debug	debug	The debug object, null if not instantiated at JVM startup.

Constructor Summary

Constructors

Constructor	Description
DiffieHellmanKeyPairGeneratorHybrid()	Creates a new instance of the DiffieHellmanKeyPairGeneratorHybrid class.

Method Summary

Modifier and Type	Method	Description
KeyPair	generateKeyPair()	Generates an RSA key pair.
protected void	getGenerator()	Creates an instance of the KeyPairGenerator.
void	initialize(int strength, SecureRandom random)	Initializes this KeyPairGenerator for given modulus size and secure random source.
void	initialize(AlgorithmParameterSpec params, SecureRandom random)	Initializes this KeyPairGenerator for given parameters and secure random source.

Methods inherited from class java.security.KeyPairGenerator

genKeyPair, getAlgorithm, getInstance, getInstance, getInstance, getProvider, initialize, initialize

Methods inherited from class java.lang.Object

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

Field Details

debug

protected static com.ibm.misc.Debug debug

The debug object, null if not instantiated at JVM startup.

Constructor Details

DiffieHellmanKeyPairGeneratorHybrid

public DiffieHellmanKeyPairGeneratorHybrid()

Creates a new instance of the DiffieHellmanKeyPairGeneratorHybrid class.

Method Details

initialize

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

Initializes this KeyPairGenerator for given parameters and secure random source.

Overrides:

initialize in class KeyPairGenerator

Parameters:

params - the RSAKeyParameterSpec for this object.

random - the SecureRandom object for generating random numbers.

Throws:

InvalidAlgorithmParameterException - thrown when parameter set is not recognized.

InvalidParameterException

initialize

public void initialize(int strength,
 SecureRandom random)
                throws InvalidParameterException

Initializes this KeyPairGenerator for given modulus size and secure random source. The private key will be stored in the CLEAR not the hardware or the PKDS, the private key label will be randomly generated and the key will be used for signing purposes.

Overrides:

initialize in class KeyPairGenerator

Parameters:

strength - the length of the key to be generated.

random - the SecureRandom object for generating a random number.

Throws:

InvalidParameterException - thrown when a parameter is not recognized.

generateKeyPair

public KeyPair generateKeyPair()

Generates an RSA key pair.

Overrides:

generateKeyPair in class KeyPairGenerator

Returns:

a KeyPair contains a pair of generated RSA keys

Throws:

IllegalArgumentException - in the key label formal is not valid

getGenerator

protected void getGenerator()

Creates an instance of the KeyPairGenerator.

Throws:

RuntimeException - if this method fails to create and to initialize the message digest.