KeyPairGeneratorSpi.java   [plain text]

/* KeyPairGeneratorSpi.java --- Key Pair Generator SPI Class
   Copyright (C) 1999, 2002 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
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this exception to your version of the library, but you are not
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exception statement from your version. */

package java.security;
import java.security.spec.AlgorithmParameterSpec;

/**
   KeyPairGeneratorSpi is the interface used to generate key pairs
   for security algorithms.

   @author Mark Benvenuto
 */
public abstract class KeyPairGeneratorSpi
{
  /**
     Constructs a new KeyPairGeneratorSpi
   */
  public KeyPairGeneratorSpi()
  {
  }

  /**
     Initialize the KeyPairGeneratorSpi with the specified
     key size and source of randomness

     @param keysize size of the key to generate
     @param random A SecureRandom source of randomness  
   */
  public abstract void initialize(int keysize, SecureRandom random);

  /**
     Initialize the KeyPairGeneratorSpi with the specified
     AlgorithmParameterSpec and source of randomness

     This is a concrete method. It may be overridden by the provider
     and if the AlgorithmParameterSpec class is invalid
     throw InvalidAlgorithmParameterException. By default this
     method just throws UnsupportedOperationException.

     @param params A AlgorithmParameterSpec to intialize with
     @param random A SecureRandom source of randomness  

     @throws InvalidAlgorithmParameterException
   */
  public void initialize(AlgorithmParameterSpec params, SecureRandom random)
    throws InvalidAlgorithmParameterException
  {
    throw new java.lang.UnsupportedOperationException();
  }

  /**
     Generates a KeyPair according the rules for the algorithm.
     Unless intialized, algorithm defaults will be used. It 
     creates a unique key pair each time.

     @return a key pair
   */
  public abstract KeyPair generateKeyPair();

  /**
   * We override clone here to make it accessible for use by
   * DummyKeyPairGenerator.
   */
  protected Object clone() throws CloneNotSupportedException
  {
    return super.clone();
  }
}