java.security: abstract public class: KeyPairGeneratorSpi

java.security
abstract public class: KeyPairGeneratorSpi [javadoc | source]

java.lang.Object
   java.security.KeyPairGeneratorSpi

Direct Known Subclasses:
Delegate, DummyKeyPairGenerator, KeyPairGenerator

This class defines the Service Provider Interface (SPI) for the KeyPairGenerator class, which is used to generate pairs of public and private keys.

All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply the implementation of a key pair generator for a particular algorithm.

In case the client does not explicitly initialize the KeyPairGenerator (via a call to an initialize method), each provider must supply (and document) a default initialization. For example, the Sun provider uses a default modulus size (keysize) of 1024 bits.

Also see:

KeyPairGenerator

java.security.spec.AlgorithmParameterSpec

author: Benjamin - Renaud

Method from java.security.KeyPairGeneratorSpi Summary:
generateKeyPair, initialize, initialize

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from java.security.KeyPairGeneratorSpi Detail:
abstract public KeyPair generateKeyPair() Generates a key pair. Unless an initialization method is called using a KeyPairGenerator interface, algorithm-specific defaults will be used. This will generate a new key pair every time it is called.
abstract public void initialize(int keysize, SecureRandom random) Initializes the key pair generator for a certain keysize, using the default parameter set.
public void initialize(AlgorithmParameterSpec params, SecureRandom random) throws InvalidAlgorithmParameterException { throw new UnsupportedOperationException(); } Initializes the key pair generator using the specified parameter set and user-provided source of randomness. This concrete method has been added to this previously-defined abstract class. (For backwards compatibility, it cannot be abstract.) It may be overridden by a provider to initialize the key pair generator. Such an override is expected to throw an InvalidAlgorithmParameterException if a parameter is inappropriate for this key pair generator. If this method is not overridden, it always throws an UnsupportedOperationException.

Method from java.security.KeyPairGeneratorSpi Detail:

 abstract public KeyPair generateKeyPair()Generates a key pair. Unless an initialization method is called
using a KeyPairGenerator interface, algorithm-specific defaults
will be used. This will generate a new key pair every time it
is called.

 abstract public  void initialize(int keysize,
    SecureRandom random)Initializes the key pair generator for a certain keysize, using
the default parameter set.

 public  void initialize(AlgorithmParameterSpec params,
    SecureRandom random) throws InvalidAlgorithmParameterException {
            throw new UnsupportedOperationException();
}

This concrete method has been added to this previously-defined abstract class. (For backwards compatibility, it cannot be abstract.) It may be overridden by a provider to initialize the key pair generator. Such an override is expected to throw an InvalidAlgorithmParameterException if a parameter is inappropriate for this key pair generator. If this method is not overridden, it always throws an UnsupportedOperationException.