VerificationProvider.java revision 13122:165608bfa113 
1/*
2 * Copyright (c) 1996, 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.provider;
27
28import java.util.*;
29import java.security.*;
30
31import sun.security.action.PutAllAction;
32
33import sun.security.rsa.SunRsaSignEntries;
34
35/**
36 * Provider used for verification of signed JAR files *if* the Sun and
37 * SunRsaSign main classes have been removed. Otherwise, this provider is not
38 * necessary and registers no algorithms. This functionality only exists to
39 * support a use case required by a specific customer and is not generally
40 * supported.
41 *
42 * @since  1.7
43 * @author Andreas Sterbenz
44 */
45public final class VerificationProvider extends Provider {
46
47    private static final long serialVersionUID = 7482667077568930381L;
48
49    private static final boolean ACTIVE;
50
51    static {
52        boolean b;
53        try {
54            Class.forName("sun.security.provider.Sun");
55            Class.forName("sun.security.rsa.SunRsaSign");
56            b = false;
57        } catch (ClassNotFoundException e) {
58            b = true;
59        }
60        ACTIVE = b;
61    }
62
63    public VerificationProvider() {
64        super("SunJarVerification", 9.0d, "Jar Verification Provider");
65        // register all algorithms normally registered by the Sun and SunRsaSign
66        // providers, but only if they are missing
67        if (ACTIVE == false) {
68            return;
69        }
70
71        // if there is no security manager installed, put directly into
72        // the provider. Otherwise, create a temporary map and use a
73        // doPrivileged() call at the end to transfer the contents
74        if (System.getSecurityManager() == null) {
75            SunEntries.putEntries(this);
76            SunRsaSignEntries.putEntries(this);
77        } else {
78            // use LinkedHashMap to preserve the order of the PRNGs
79            Map<Object, Object> map = new LinkedHashMap<>();
80            SunEntries.putEntries(map);
81            SunRsaSignEntries.putEntries(map);
82            AccessController.doPrivileged(new PutAllAction(this, map));
83        }
84    }
85
86}
87