com.motorola.iden.security
Class KeyPairGenerator

java.lang.Object
  |
  +--com.motorola.iden.security.KeyPairGenerator

public class KeyPairGenerator

extends java.lang.Object

The KeyPairGenerator class is used to generate pairs of public and private keys. Key pair generators are constructed using the getInstance factory methods (static methods that return instances of a given class).

A Key pair generator for a particular algorithm creates a public/private key pair that can be used with this algorithm. It also associates algorithm-specific parameters with each of the generated keys.

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Constructor Summary

protected

KeyPairGenerator(KeyPairGeneratorSpi keypairgeneratorspi) Creates a KeyPairGenerator object.

Method Summary

KeyPair	generateKeyPair() Generates a key pair.
static KeyPairGenerator	getInstance(java.lang.String algorithm) Generates a KeyPairGenerator object that implements the specified key pair generation algorithm.
void	initialize(AlgorithmParameterSpec params) Initializes the key pair generator for a specified parameter set.
void	initialize(int keysize) Initializes the key pair generator for a certain keysize using a default parameter set.

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyPairGenerator

protected KeyPairGenerator(KeyPairGeneratorSpi keypairgeneratorspi)

Creates a KeyPairGenerator object.

Parameters:

keypairgeneratorspi - the instance of an algorithm which implements KeyPairGeneratorSpi

Method Detail

getInstance

public static KeyPairGenerator getInstance(java.lang.String algorithm)
                                    throws NoSuchAlgorithmException

Generates a KeyPairGenerator object that implements the specified key pair generation algorithm.

Parameters:

algorithm - name of the algorithm. Algorithm DH and ECDH are available in current implementation.

Returns:

a key pair generator that implements the requested algorithm. NoSuchAlgorithmException if the specified algorithm is not available.

initialize

public void initialize(int keysize)
                throws InvalidAlgorithmParameterException

Initializes the key pair generator for a certain keysize using a default parameter set.

Parameters:

keysize - the keysize. This is an algorithm-specific metric, such as modulus length, specified in number of bits.

Throws:

InvalidAlgorithmParameterException - if the keysize is not supported by this KeyPairGenerator object.

initialize

public void initialize(AlgorithmParameterSpec params)
                throws InvalidAlgorithmParameterException

Initializes the key pair generator for a specified parameter set.

Parameters:

params - the parameter set used to generate the keys.

Throws:

InvalidAlgorithmParameterException - if the given params are not supported by this KeyPairGenerator object.

generateKeyPair

public KeyPair generateKeyPair()

Generates a key pair. Key pair generator must be initialized to generate key pair, or null will be returned.

Returns:

the generated key pair