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 java.security.spec;
19
20import java.math.BigInteger;
21import java.security.interfaces.DSAParams;
22
23/**
24 * The parameter specification used with the Digital Signature Algorithm (DSA).
25 */
26public class DSAParameterSpec implements AlgorithmParameterSpec, DSAParams {
27    // Prime
28    private final BigInteger p;
29    // Sub-prime
30    private final BigInteger q;
31    // Base
32    private final BigInteger g;
33
34    /**
35     * Creates a new {@code DSAParameterSpec} with the specified prime {@code p},
36     * sub-prime {@code q} and the base {@code g}.
37     *
38     * @param p
39     *            the prime {@code p}.
40     * @param q
41     *            the sub-prime {@code q}.
42     * @param g
43     *            the base {@code g};
44     */
45    public DSAParameterSpec(BigInteger p, BigInteger q, BigInteger g) {
46        this.p = p;
47        this.q = q;
48        this.g = g;
49    }
50
51    /**
52     * Returns the base {@code g}.
53     *
54     * @return the base {@code g}.
55     */
56    public BigInteger getG() {
57        return g;
58    }
59
60    /**
61     * Returns the prime {@code p}.
62     *
63     * @return the prime {@code p}.
64     */
65    public BigInteger getP() {
66        return p;
67    }
68
69    /**
70     * Returns the sub-prime {@code q}.
71     *
72     * @return the sub-prime {@code q}.
73     */
74    public BigInteger getQ() {
75        return q;
76    }
77}
78