IT. Expert System.

public class DSAKeyFactoryImpl
extends KeyFactorySpi

• Constructor Summary

  Constructors

  Constructor and Description
  DSAKeyFactoryImpl()

• Method Summary

  Methods

  Modifier and Type	Method and Description
  protected PrivateKey	engineGeneratePrivate(KeySpec keySpec) This method generates a DSAPrivateKey object from the provided key specification.
  protected PublicKey	engineGeneratePublic(KeySpec keySpec) This method generates a DSAPublicKey object from the provided key specification.
  protected <T extends KeySpec> T	engineGetKeySpec(Key key, Class<T> keySpec) This method returns a specification for the supplied key.
  protected Key	engineTranslateKey(Key key) The method generates a DSAPublicKey object from the provided key.

  • Methods inherited from class java.lang.Object

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

• Constructor Detail

  • DSAKeyFactoryImpl

    public DSAKeyFactoryImpl()

• Method Detail

  • engineGeneratePrivate

    protected PrivateKey engineGeneratePrivate(KeySpec keySpec)
                                        throws InvalidKeySpecException

    This method generates a DSAPrivateKey object from the provided key specification.

    Specified by:

    engineGeneratePrivate in class KeyFactorySpi

    Parameters:

    keySpec - - the specification (key material) for the DSAPrivateKey.

    Returns:

    a DSAPrivateKey object

    Throws:

    InvalidKeySpecException - if "keySpec" is neither DSAPrivateKeySpec nor PKCS8EncodedKeySpec

  • engineGeneratePublic

    protected PublicKey engineGeneratePublic(KeySpec keySpec)
                                      throws InvalidKeySpecException

    This method generates a DSAPublicKey object from the provided key specification.

    Specified by:

    engineGeneratePublic in class KeyFactorySpi

    Parameters:

    keySpec - - the specification (key material) for the DSAPublicKey.

    Returns:

    a DSAPublicKey object

    Throws:

    InvalidKeySpecException - if "keySpec" is neither DSAPublicKeySpec nor X509EncodedKeySpec

  • engineGetKeySpec

    protected <T extends KeySpec> T engineGetKeySpec(Key key,
                                         Class<T> keySpec)
                                          throws InvalidKeySpecException

    This method returns a specification for the supplied key. The specification will be returned in the form of an object of the type specified by keySpec.

    Specified by:

    engineGetKeySpec in class KeyFactorySpi

    Parameters:

    key - - either DSAPrivateKey or DSAPublicKey

    keySpec - - either DSAPrivateKeySpec.class or DSAPublicKeySpec.class

    Returns:

    either a DSAPrivateKeySpec or a DSAPublicKeySpec

    Throws:

    InvalidKeySpecException - if "keySpec" is not a specification for DSAPublicKey or DSAPrivateKey

  • engineTranslateKey

    protected Key engineTranslateKey(Key key)
                              throws InvalidKeyException

    The method generates a DSAPublicKey object from the provided key.

    Specified by:

    engineTranslateKey in class KeyFactorySpi

    Parameters:

    key - - a DSAPublicKey object or DSAPrivateKey object.

    Returns:

    object of the same type as the "key" argument

    Throws:

    InvalidKeyException - if "key" is neither DSAPublicKey nor DSAPrivateKey