mirror of git://gcc.gnu.org/git/gcc.git
136 lines
4.0 KiB
Java
136 lines
4.0 KiB
Java
/* DHParameterSpec.java -- Parameters for Diffie-Hellman keys.
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.crypto.spec;
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import java.math.BigInteger;
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import java.security.spec.AlgorithmParameterSpec;
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/**
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* The base set of parameters necessary to perform Diffie-Hellman key
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* exchange. Each party in the key exchange shares these parameters.
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*
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* <p>Each set of parameters consists of a <i>base generator</i>
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* <code>g</code>, a <i>prime modulus</i> <code>p</code>, and an
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* optional length, in bits, of the private exponent.
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*
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* <p>See <a href="http://www.rsasecurity.com/rsalabs/pkcs/pkcs-3/">PKCS
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* #3 - Diffie-Hellman Key Agreement Standard</a> for more information.
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*
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* @author Casey Marshall (csm@gnu.org)
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* @since 1.4
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* @see javax.crypto.KeyAgreement
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*/
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public class DHParameterSpec implements AlgorithmParameterSpec
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{
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// Variables.
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// ------------------------------------------------------------------------
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/** The base generator g. */
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private BigInteger g;
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/** The prime modulus p. */
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private BigInteger p;
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/** The length, in bits, of the private exponent. */
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private int l;
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// Constructors.
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// ------------------------------------------------------------------------
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/**
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* Create a new set of Diffie-Hellman parameters.
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*
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* @param p The prime modulus.
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* @param g The base generator.
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*/
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public DHParameterSpec(BigInteger p, BigInteger g)
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{
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this(p, g, 0);
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}
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/**
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* Create a new set of Diffie-Hellman parameters.
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*
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* @param p The prime modulus.
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* @param g The base generator.
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* @param l The size of the private exponent, in bits.
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*/
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public DHParameterSpec(BigInteger p, BigInteger g, int l)
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{
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this.p = p;
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this.g = g;
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this.l = l;
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}
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// Instance methods.
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// ------------------------------------------------------------------------
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/**
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* Get the base generator, <i>g</i>.
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*
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* @return The base generator <i>g</i>.
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*/
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public BigInteger getG()
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{
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return g;
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}
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/**
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* Get the length of the private exponent, in bits.
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*
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* @return The length of the private exponent, in bits, or 0 if this
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* has not been explicitly set.
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*/
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public int getL()
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{
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return l;
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}
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/**
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* Get the prime modulus, <i>p</i>.
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*
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* @return The prime modulus, <i>p</i>.
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*/
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public BigInteger getP()
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{
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return p;
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}
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}
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