LegacyAlgorithmConstraints.java revision 12745:f068a4ffddd2 
1/*
2 * Copyright (c) 2015, 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
26package sun.security.util;
27
28import java.security.AlgorithmParameters;
29import java.security.CryptoPrimitive;
30import java.security.Key;
31import java.util.HashMap;
32import java.util.Map;
33import java.util.Set;
34import static sun.security.util.AbstractAlgorithmConstraints.getAlgorithms;
35
36/**
37 * Algorithm constraints for legacy algorithms.
38 */
39public class LegacyAlgorithmConstraints extends AbstractAlgorithmConstraints {
40
41    // the known security property, jdk.tls.legacyAlgorithms
42    public static final String PROPERTY_TLS_LEGACY_ALGS =
43            "jdk.tls.legacyAlgorithms";
44
45    private static final Map<String, String[]> legacyAlgorithmsMap =
46                                                          new HashMap<>();
47
48    private final String[] legacyAlgorithms;
49
50    public LegacyAlgorithmConstraints(String propertyName,
51            AlgorithmDecomposer decomposer) {
52        super(decomposer);
53        legacyAlgorithms = getAlgorithms(legacyAlgorithmsMap, propertyName);
54    }
55
56    @Override
57    public final boolean permits(Set<CryptoPrimitive> primitives,
58            String algorithm, AlgorithmParameters parameters) {
59        return checkAlgorithm(legacyAlgorithms, algorithm, decomposer);
60    }
61
62    @Override
63    public final boolean permits(Set<CryptoPrimitive> primitives, Key key) {
64        return true;
65    }
66
67    @Override
68    public final boolean permits(Set<CryptoPrimitive> primitives,
69            String algorithm, Key key, AlgorithmParameters parameters) {
70        return checkAlgorithm(legacyAlgorithms, algorithm, decomposer);
71    }
72
73}
74