1 /*
   2  * Copyright (c) 1996, 2011, 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 
  26 package sun.security.provider;
  27 
  28 import java.util.*;
  29 import java.security.*;
  30 
  31 import sun.security.action.PutAllAction;
  32 
  33 import 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  */
  45 public 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", 1.7, "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 }