1 /*
2 * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25 package java.security.spec;
26
27 /**
28 * This immutable class specifies an elliptic curve public key with
29 * its associated parameters.
30 *
31 * @see KeySpec
32 * @see ECPoint
33 * @see ECParameterSpec
34 *
35 * @author Valerie Peng
36 *
37 * @since 1.5
38 */
39 public class ECPublicKeySpec implements KeySpec {
40
41 private ECPoint w;
42 private ECParameterSpec params;
43
44 /**
45 * Creates a new ECPublicKeySpec with the specified
46 * parameter values.
47 * @param w the public point.
48 * @param params the associated elliptic curve domain
49 * parameters.
50 * @exception NullPointerException if <code>w</code>
51 * or <code>params</code> is null.
52 * @exception IllegalArgumentException if <code>w</code>
53 * is point at infinity, i.e. ECPoint.POINT_INFINITY
54 */
55 public ECPublicKeySpec(ECPoint w, ECParameterSpec params) {
56 if (w == null) {
57 throw new NullPointerException("w is null");
58 }
59 if (params == null) {
60 throw new NullPointerException("params is null");
61 }
62 if (w == ECPoint.POINT_INFINITY) {
63 throw new IllegalArgumentException("w is ECPoint.POINT_INFINITY");
64 }
65 this.w = w;
66 this.params = params;
67 }
68
69 /**
70 * Returns the public point W.
71 * @return the public point W.
72 */
73 public ECPoint getW() {
74 return w;
75 }
76
77 /**
78 * Returns the associated elliptic curve domain
79 * parameters.
80 * @return the EC domain parameters.
81 */
82 public ECParameterSpec getParams() {
83 return params;
84 }
85 }
Save This Page