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Sourcecode: libgnucrypto-java version File versions

DHGenParameterSpec.java

/*
 * Copyright (c) 2000 The Legion Of The Bouncy Castle
 * (http://www.bouncycastle.org)
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * 
 */

package javax.crypto.spec;

import java.security.spec.AlgorithmParameterSpec;

/**
 * This class specifies the set of parameters used for generating
 * Diffie-Hellman (system) parameters for use in Diffie-Hellman key
 * agreement. This is typically done by a central
 * authority.
 * <p>
 * The central authority, after computing the parameters, must send this
 * information to the parties looking to agree on a secret key.
 */
00040 public class DHGenParameterSpec
    implements AlgorithmParameterSpec
{
    private int primeSize;
    private int exponentSize;

    /**
     * Constructs a parameter set for the generation of Diffie-Hellman
     * (system) parameters. The constructed parameter set can be used to
     * initialize an <a href="http://java.sun.com/products/jdk/1.2/docs/api/java.security.AlgorithmParameterGenerator.html"><code>AlgorithmParameterGenerator</code></a>
     * object for the generation of Diffie-Hellman parameters.
     *
     * @param primeSize the size (in bits) of the prime modulus.
     * @param exponentSize the size (in bits) of the random exponent.
     */
00055     public DHGenParameterSpec(
        int     primeSize,
        int     exponentSize)
    {
        this.primeSize = primeSize;
        this.exponentSize = exponentSize;
    }

    /**
     * Returns the size in bits of the prime modulus.
     *
     * @return the size in bits of the prime modulus
     */
00068     public int getPrimeSize()
    {
        return primeSize;
    }

    /**
     * Returns the size in bits of the random exponent (private value).
     *
     * @return the size in bits of the random exponent (private value)
     */
00078     public int getExponentSize()
    {
        return exponentSize;
    }
}

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