1 /*

     2  * Copyright (c) 1996, 2016, 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 import static sun.security.util.SecurityConstants.PROVIDER_VER;

    35 

    36 

    37 /**

    38  * Provider used for verification of signed JAR files *if* the Sun and

    39  * SunRsaSign main classes have been removed. Otherwise, this provider is not

    40  * necessary and registers no algorithms. This functionality only exists to

    41  * support a use case required by a specific customer and is not generally

    42  * supported.

    43  *

    44  * @since  1.7

    45  * @author Andreas Sterbenz

    46  */

    47 public final class VerificationProvider extends Provider {

    48 

    49     private static final long serialVersionUID = 7482667077568930381L;

    50 

    51     private static final boolean ACTIVE;

    52 

    53     static {

    54         boolean b;

    55         try {

    56             Class.forName("sun.security.provider.Sun");

    57             Class.forName("sun.security.rsa.SunRsaSign");

    58             b = false;

    59         } catch (ClassNotFoundException e) {

    60             b = true;

    61         }

    62         ACTIVE = b;

    63     }

    64 

    65     public VerificationProvider() {

    66         super("SunJarVerification", PROVIDER_VER, "Jar Verification Provider");

    67         // register all algorithms normally registered by the Sun and SunRsaSign

    68         // providers, but only if they are missing

    69         if (ACTIVE == false) {

    70             return;

    71         }

    72 

    73         // if there is no security manager installed, put directly into

    74         // the provider. Otherwise, create a temporary map and use a

    75         // doPrivileged() call at the end to transfer the contents

    76         if (System.getSecurityManager() == null) {

    77             SunEntries.putEntries(this);

    78             SunRsaSignEntries.putEntries(this);

    79         } else {

    80             // use LinkedHashMap to preserve the order of the PRNGs

    81             Map<Object, Object> map = new LinkedHashMap<>();

    82             SunEntries.putEntries(map);

    83             SunRsaSignEntries.putEntries(map);

    84             AccessController.doPrivileged(new PutAllAction(this, map));

    85         }

    86     }

    87 

    88 }