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;
21
22import org.apache.harmony.security.internal.nls.Messages;
23
24/**
25 * The parameters specifying an Elliptic Curve (EC) private key.
26 */
27public class ECPrivateKeySpec implements KeySpec {
28    // Private value associated with this key
29    private final BigInteger s;
30    // Elliptic Curve domain parameters associated with this key
31    private final ECParameterSpec params;
32
33    /**
34     * Creates a new {@code ECPrivateKeySpec} with the specified private value
35     * {@code S} and parameter specification.
36     *
37     * @param s
38     *            the private value {@code S}.
39     * @param params
40     *            the domain parameter specification.
41     */
42    public ECPrivateKeySpec(BigInteger s, ECParameterSpec params) {
43        this.s = s;
44        this.params = params;
45        // throw NullPointerException if s or params is null
46        if (this.s == null) {
47            throw new NullPointerException(Messages.getString("security.83", "s")); //$NON-NLS-1$ //$NON-NLS-2$
48        }
49        if (this.params == null) {
50            throw new NullPointerException(Messages.getString("security.83", "params")); //$NON-NLS-1$ //$NON-NLS-2$
51        }
52    }
53
54    /**
55     * Returns the domain parameter specification.
56     *
57     * @return the domain parameter specification.
58     */
59    public ECParameterSpec getParams() {
60        return params;
61    }
62
63    /**
64     * Returns the private value {@code S}.
65     *
66     * @return the private value {@code S}.
67     */
68    public BigInteger getS() {
69        return s;
70    }
71}
72