86 lines
3.0 KiB
Java
86 lines
3.0 KiB
Java
/*
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* Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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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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* This class specifies the set of parameters used for generating
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* Diffie-Hellman (system) parameters for use in Diffie-Hellman key
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* agreement. This is typically done by a central
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* authority.
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*
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* <p> The central authority, after computing the parameters, must send this
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* information to the parties looking to agree on a secret key.
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*
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* @author Jan Luehe
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*
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* @see DHParameterSpec
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* @since 1.4
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*/
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public class DHGenParameterSpec implements AlgorithmParameterSpec {
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// The size in bits of the prime modulus
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private int primeSize;
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// The size in bits of the random exponent (private value)
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private int exponentSize;
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/**
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* Constructs a parameter set for the generation of Diffie-Hellman
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* (system) parameters. The constructed parameter set can be used to
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* initialize an
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* {@link java.security.AlgorithmParameterGenerator AlgorithmParameterGenerator}
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* object for the generation of Diffie-Hellman parameters.
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*
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* @param primeSize the size (in bits) of the prime modulus.
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* @param exponentSize the size (in bits) of the random exponent.
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*/
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public DHGenParameterSpec(int primeSize, int exponentSize) {
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this.primeSize = primeSize;
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this.exponentSize = exponentSize;
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}
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/**
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* Returns the size in bits of the prime modulus.
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*
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* @return the size in bits of the prime modulus
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*/
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public int getPrimeSize() {
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return this.primeSize;
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}
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/**
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* Returns the size in bits of the random exponent (private value).
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*
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* @return the size in bits of the random exponent (private value)
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*/
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public int getExponentSize() {
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return this.exponentSize;
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}
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}
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