1/*
2 *  Licensed to the Apache Software Foundation (ASF) under one or more
3 *  contributor license agreements.  See the NOTICE file distributed with
4 *  this work for additional information regarding copyright ownership.
5 *  The ASF licenses this file to You under the Apache License, Version 2.0
6 *  (the "License"); you may not use this file except in compliance with
7 *  the License.  You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 */
17
18package javax.crypto.spec;
19
20import java.math.BigInteger;
21import java.security.spec.KeySpec;
22
23/**
24 * The key specification for a Diffie-Hellman public key.
25 */
26public class DHPublicKeySpec implements KeySpec {
27
28    private final BigInteger y;
29    private final BigInteger p;
30    private final BigInteger g;
31
32    /**
33     * Creates a new <code>DHPublicKeySpec</code> instance with the specified
34     * <i>public value</i> <code>y</code>, the <i>prime modulus</i>
35     * <code>p</code> and the <i>base generator</i> <code>g</code>.
36     *
37     * @param y
38     *            the public value.
39     * @param p
40     *            the prime modulus.
41     * @param g
42     *            the base generator.
43     */
44    public DHPublicKeySpec(BigInteger y, BigInteger p, BigInteger g) {
45        this.y = y;
46        this.p = p;
47        this.g = g;
48    }
49
50    /**
51     * Returns the <i>public value</i> <code>y</code>.
52     *
53     * @return the public value <code>y</code>.
54     */
55    public BigInteger getY() {
56        return y;
57    }
58
59    /**
60     * Returns the <i>prime modulus</i> <code>p</code>.
61     *
62     * @return the prime modulus <code>p</code>.
63     */
64    public BigInteger getP() {
65        return p;
66    }
67
68    /**
69     * Returns the <i>base generator</i> <code>g</code>;
70     *
71     * @return the base generator <code>g</code>;
72     */
73    public BigInteger getG() {
74        return g;
75    }
76}
77
78