1 /*

     2  * Copyright (c) 2015, 2017 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.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 package c;

    24 

    25 import java.security.Provider;

    26 import java.security.Security;

    27 import java.util.Iterator;

    28 import java.util.ServiceLoader;

    29 

    30 /**

    31  * A Test client using different mechanism to search the custom security

    32  * provider. It uses ClassLoader, ServiceLoader and default mechanism to find

    33  * a provider registered through "java.security" extension file.

    34  */

    35 public class TestClient {

    36 

    37     public static void main(String[] args) throws Exception {

    38 

    39         Provider p = null;

    40         if (args != null && args.length > 1) {

    41             switch (args[0]) {

    42                 case "CL":

    43                     p = (Provider) Class.forName(args[1]).newInstance();

    44                     if (Security.addProvider(p) == -1) {

    45                         throw new RuntimeException("Failed to add provider");

    46                     }

    47                     break;

    48                 case "SL":

    49                     ServiceLoader<Provider> services

    50                             = ServiceLoader.load(java.security.Provider.class);

    51                     Iterator<Provider> iterator = services.iterator();

    52                     while (iterator.hasNext()) {

    53                         Provider spr = iterator.next();

    54                         if (spr.getName().equals(args[1])) {

    55                             p = spr;

    56                             if (Security.addProvider(p) == -1) {

    57                                 throw new RuntimeException(

    58                                         "Failed to add provider");

    59                             }

    60                             break;

    61                         }

    62                     }

    63                     break;

    64                 case "SPN":

    65                 case "SPT":

    66                     p = Security.getProvider(args[1]);

    67                     break;

    68                 default:

    69                     throw new RuntimeException("Invalid argument.");

    70             }

    71         }

    72         if (p == null) {

    73             throw new RuntimeException("Provider TestProvider not found");

    74         }

    75         System.out.printf("Client: found provider %s", p.getName());

    76     }

    77 }