gnu.java.security.provider

Class DSAKeyPairGenerator

Implemented Interfaces:
DSAKeyPairGenerator

public class DSAKeyPairGenerator
extends KeyPairGeneratorSpi
implements DSAKeyPairGenerator

Constructor Summary

DSAKeyPairGenerator()
Constructs a new KeyPairGeneratorSpi

Method Summary

KeyPair
generateKeyPair()
Generates a KeyPair according the rules for the algorithm.
void
initialize(int modlen, boolean genParams, SecureRandom random)
Initializes the key generator to a give modulus.
void
initialize(int keysize, SecureRandom random)
Initialize the KeyPairGeneratorSpi with the specified key size and source of randomness
void
initialize(DSAParams params, SecureRandom random)
Initializes the key generator with the specified DSA parameters and random bit source
void
initialize(AlgorithmParameterSpec params, SecureRandom random)
Initialize the KeyPairGeneratorSpi with the specified AlgorithmParameterSpec and source of randomness This is a concrete method.

Methods inherited from class java.security.KeyPairGeneratorSpi

clone, generateKeyPair, initialize, initialize

Methods inherited from class java.lang.Object

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

Constructor Details

DSAKeyPairGenerator

public DSAKeyPairGenerator()
Constructs a new KeyPairGeneratorSpi

Method Details

generateKeyPair

public KeyPair generateKeyPair()
Generates a KeyPair according the rules for the algorithm. Unless intialized, algorithm defaults will be used. It creates a unique key pair each time.
Overrides:
generateKeyPair in interface KeyPairGeneratorSpi
Returns:
a key pair

initialize

public void initialize(int modlen,
                       boolean genParams,
                       SecureRandom random)
            throws InvalidParameterException
Initializes the key generator to a give modulus. If the genParams value is true then new base, prime, and subprime values will be generated for the given modulus. If not, the pre-calculated values will be used. If no pre-calculated values exist for the specified modulus, an exception will be thrown. It is guaranteed that there will always be pre-calculated values for all modulus values between 512 and 1024 bits inclusives.
Specified by:
initialize in interface DSAKeyPairGenerator
Parameters:
modlen - The modulus length
genParams - true to generate new DSA parameters, false otherwise
random - The random bit source to use
Throws:
InvalidParameterException - If a parameter is invalid

initialize

public void initialize(int keysize,
                       SecureRandom random)
Initialize the KeyPairGeneratorSpi with the specified key size and source of randomness
Overrides:
initialize in interface KeyPairGeneratorSpi
Parameters:
keysize - size of the key to generate
random - A SecureRandom source of randomness

initialize

public void initialize(DSAParams params,
                       SecureRandom random)
Initializes the key generator with the specified DSA parameters and random bit source
Specified by:
initialize in interface DSAKeyPairGenerator
Parameters:
params - The DSA parameters to use
random - The random bit source to use
Throws:
InvalidParameterException - If the parameters passed are not valid

initialize

public void initialize(AlgorithmParameterSpec params,
                       SecureRandom random)
            throws InvalidAlgorithmParameterException
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.
Overrides:
initialize in interface KeyPairGeneratorSpi
Parameters:
params - A AlgorithmParameterSpec to intialize with
random - A SecureRandom source of randomness

GnuDSAKeyPairGenerator.java --- Gnu DSA Key Pair Generator Copyright (C) 1999, 2005 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 the Free Software Foundation; either version 2, or (at your option) 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. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. 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 modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.