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javax.crypto.spec

Class DHParameterSpec

Implemented Interfaces:
AlgorithmParameterSpec
public class DHParameterSpec
extends Object
implements AlgorithmParameterSpec
The base set of parameters necessary to perform Diffie-Hellman key exchange. Each party in the key exchange shares these parameters.

Each set of parameters consists of a base generator g, a prime modulus p, and an optional length, in bits, of the private exponent.

See PKCS #3 - Diffie-Hellman Key Agreement Standard for more information.

Since:
1.4
See Also:
KeyAgreement

Constructor Summary

DHParameterSpec(BigInteger p, BigInteger g)
Create a new set of Diffie-Hellman parameters.
DHParameterSpec(BigInteger p, BigInteger g, int l)
Create a new set of Diffie-Hellman parameters.

Method Summary

BigInteger
getG()
Get the base generator, g.
int
getL()
Get the length of the private exponent, in bits.
BigInteger
getP()
Get the prime modulus, p.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DHParameterSpec

public DHParameterSpec(BigInteger p,
                       BigInteger g)
Create a new set of Diffie-Hellman parameters.
Parameters:
p - The prime modulus.
g - The base generator.

DHParameterSpec

public DHParameterSpec(BigInteger p,
                       BigInteger g,
                       int l)
Create a new set of Diffie-Hellman parameters.
Parameters:
p - The prime modulus.
g - The base generator.
l - The size of the private exponent, in bits.

Method Details

getG

public BigInteger getG()
Get the base generator, g.
Returns:
The base generator g.

getL

public int getL()
Get the length of the private exponent, in bits.
Returns:
The length of the private exponent, in bits, or 0 if this has not been explicitly set.

getP

public BigInteger getP()
Get the prime modulus, p.
Returns:
The prime modulus, p.
DHParameterSpec.java -- Parameters for Diffie-Hellman keys. Copyright (C) 2004 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.

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