1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package java.security.spec;
26
27 import java.util.Objects;
28
29 /**
30 * This class is used to specify any algorithm parameters that are determined
31 * by a standard name. This class also holds constants for standard parameter
32 * set names. The names of these constants exactly match the corresponding
33 * parameter set name. For example, NamedParameterSpec.X25519 represents the
34 * parameter set identified by the string "X25519". These strings are defined
35 * in the <a href=
36 * "{@docRoot}/../specs/security/standard-names.html#parameter-spec-names">
37 * Java Security Standard Algorithm Names Specification</a>.
38 *
39 * @since 11
40 *
41 */
42 public class NamedParameterSpec implements AlgorithmParameterSpec {
43
44 /**
45 * The X25519 parameters
46 */
47 public static final NamedParameterSpec X25519
48 = new NamedParameterSpec("X25519");
49 /**
50 * The X448 parameters
51 */
52 public static final NamedParameterSpec X448
53 = new NamedParameterSpec("X448");
54
55 private String name;
56
57 /**
58 * Creates a parameter specification using a standard (or predefined)
59 * name {@code stdName}. For the
60 * list of supported names, please consult the documentation
61 * of the provider whose implementation will be used.
62 *
63 * @param stdName the standard name of the algorithm parameters
64 *
65 * @throws NullPointerException if {@code stdName}
66 * is null.
67 */
68 public NamedParameterSpec(String stdName) {
69 Objects.requireNonNull(stdName, "stdName must not be null");
70
71 this.name = stdName;
72 }
73
74 /**
75 * Returns the standard name that determines the algorithm parameters.
76 * @return the standard name.
77 */
78 public String getName() {
79 return name;
80 }
81 }
82