JDK8/Java8源码在线阅读

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package javax.crypto.spec;

import java.math.BigInteger;

/**
 * This class specifies a Diffie-Hellman public key with its associated
 * parameters.
 *
 * <p>Note that this class does not perform any validation on specified
 * parameters. Thus, the specified values are returned directly even
 * if they are null.
 *
 * @author Jan Luehe
 *
 * @see DHPrivateKeySpec
 * @since 1.4
 */
public class DHPublicKeySpec implements java.security.spec.KeySpec {

    // The public value
    private BigInteger y;

    // The prime modulus
    private BigInteger p;

    // The base generator
    private BigInteger g;

    /**
     * Constructor that takes a public value <code>y</code>, a prime
     * modulus <code>p</code>, and a base generator <code>g</code>.
     * @param y  public value y
     * @param p  prime modulus p
     * @param g  base generator g
     */
    public DHPublicKeySpec(BigInteger y, BigInteger p, BigInteger g) {
        this.y = y;
        this.p = p;
        this.g = g;
    }

    /**
     * Returns the public value <code>y</code>.
     *
     * @return the public value <code>y</code>
     */
    public BigInteger getY() {
        return this.y;
    }

    /**
     * Returns the prime modulus <code>p</code>.
     *

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