Module ibm.crypto.hdwrcca
Package com.ibm.crypto.hdwrCCA.provider

Class DSAKeyFactory

  • public class DSAKeyFactory
extends java.security.KeyFactorySpi
    This class is a concrete implementaion of key factory for DSA.

    • Constructor Summary

      Constructors 
      Constructor Description
      DSAKeyFactory()
      Constructs a new instance of this class.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected java.security.PrivateKey engineGeneratePrivate​(java.security.spec.KeySpec keySpec)
      Generates a private key object from the provided key specification (key material).
      protected java.security.PublicKey engineGeneratePublic​(java.security.spec.KeySpec keySpec)
      Generates a public key object from the provided key specification (key material).
      protected <T extends java.security.spec.KeySpec>
      T      		 engineGetKeySpec​(java.security.Key key, java.lang.Class<T> keySpec)
      Returns a specification (key material) of the given key object in the requested format.
      protected java.security.Key engineTranslateKey​(java.security.Key key)
      Translates a key object, whose provider may be unknown or potentially untrusted, into a corresponding key object of this key factory.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • DSAKeyFactory

        public DSAKeyFactory()
        Constructs a new instance of this class.

    • Method Detail

      • engineGeneratePrivate

        protected java.security.PrivateKey engineGeneratePrivate​(java.security.spec.KeySpec keySpec)
                                                  throws java.security.spec.InvalidKeySpecException
        Generates a private key object from the provided key specification (key material).
        Specified by:
        engineGeneratePrivate in class java.security.KeyFactorySpi
        Parameters:
        keySpec - the specification (key material) of the private key (DSAPrivateHWKeySpec and KeyLabelKeySpec are the only acceptable keySpec's).
        Returns:
        the newly created DSA private key.
        Throws:
        java.security.spec.InvalidKeySpecException - if the provided key specification is not appropriate for this key factory to produce a private key.

      • engineGeneratePublic

        protected java.security.PublicKey engineGeneratePublic​(java.security.spec.KeySpec keySpec)
                                                throws java.security.spec.InvalidKeySpecException
        Generates a public key object from the provided key specification (key material).
        Specified by:
        engineGeneratePublic in class java.security.KeyFactorySpi
        Parameters:
        keySpec - the specification (key material) of the public key.
        Returns:
        the newly created public key.
        Throws:
        java.security.spec.InvalidKeySpecException - if the provided key specification is not appropriate for this key factory to produce a public key.

      • engineGetKeySpec

        protected <T extends java.security.spec.KeySpec> T engineGetKeySpec​(java.security.Key key,
                                                                    java.lang.Class<T> keySpec)
                                                             throws java.security.spec.InvalidKeySpecException
        Returns a specification (key material) of the given key object in the requested format.
        Specified by:
        engineGetKeySpec in class java.security.KeyFactorySpi
        Parameters:
        key - the key for which the specification is to be computed.
        keySpec - the requested format in which the key material shall be returned.
        Returns:
        the underlying key specification (key material) in the requested format.
        Throws:
        java.security.spec.InvalidKeySpecException - if the provided key specification is not appropriate for the given key, or the given key cannot be processed (e.g., the given key has an unrecognized algorithm or format).

      • engineTranslateKey

        protected java.security.Key engineTranslateKey​(java.security.Key key)
                                        throws java.security.InvalidKeyException
        Translates a key object, whose provider may be unknown or potentially untrusted, into a corresponding key object of this key factory.
        Specified by:
        engineTranslateKey in class java.security.KeyFactorySpi
        Parameters:
        key - the key whose provider is unknown or untrusted (for this provider: DSAPublicKey is the only accaptable key type).
        Returns:
        the translated key.
        Throws:
        java.security.InvalidKeyException - if the given key cannot be processed by this key factory.