SecurityAllowedTestCase xref

    1   /*
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    3    * or more contributor license agreements.  See the NOTICE file
    4    * distributed with this work for additional information
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    6    * to you under the Apache License, Version 2.0 (the
    7    * "License"); you may not use this file except in compliance
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    10   *    http://www.apache.org/licenses/LICENSE-2.0
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    12   * Unless required by applicable law or agreed to in writing,
    13   * software distributed under the License is distributed on an
    14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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    17   * under the License.
    18   */
    19
    20  package org.apache.commons.logging.security;
    21
    22  import java.io.PrintWriter;
    23  import java.io.StringWriter;
    24  import java.lang.reflect.Field;
    25  import java.lang.reflect.Method;
    26  import java.security.AllPermission;
    27  import java.util.Hashtable;
    28
    29  import junit.framework.Test;
    30  import junit.framework.TestCase;
    31
    32  import org.apache.commons.logging.Log;
    33  import org.apache.commons.logging.LogFactory;
    34  import org.apache.commons.logging.PathableClassLoader;
    35  import org.apache.commons.logging.PathableTestSuite;
    36
    37  /**
    38   * Tests for logging with a security policy that allows JCL access to everything.
    39   * <p>
    40   * This class has only one unit test, as we are (in part) checking behaviour in
    41   * the static block of the LogFactory class. As that class cannot be unloaded after
    42   * being loaded into a classloader, the only workaround is to use the
    43   * PathableClassLoader approach to ensure each test is run in its own
    44   * classloader, and use a separate testcase class for each test.
    45   */
    46  public class SecurityAllowedTestCase extends TestCase
    47  {
    48      private SecurityManager oldSecMgr;
    49
    50      // Dummy special hashtable, so we can tell JCL to use this instead of
    51      // the standard one.
    52      public static class CustomHashtable extends Hashtable {
    53      }
    54
    55      /**
    56       * Return the tests included in this test suite.
    57       */
    58      public static Test suite() throws Exception {
    59          PathableClassLoader parent = new PathableClassLoader(null);
    60          parent.useExplicitLoader("junit.", Test.class.getClassLoader());
    61          parent.addLogicalLib("commons-logging");
    62          parent.addLogicalLib("testclasses");
    63
    64          Class testClass = parent.loadClass(
    65              "org.apache.commons.logging.security.SecurityAllowedTestCase");
    66          return new PathableTestSuite(testClass, parent);
    67      }
    68
    69      public void setUp() {
    70          // save security manager so it can be restored in tearDown
    71          oldSecMgr = System.getSecurityManager();
    72      }
    73
    74      public void tearDown() {
    75          // Restore, so other tests don't get stuffed up if a test
    76          // sets a custom security manager.
    77          System.setSecurityManager(oldSecMgr);
    78      }
    79
    80      /**
    81       * Test what happens when JCL is run with all permissions enabled. Custom
    82       * overrides should take effect.
    83       */
    84      public void testAllAllowed() {
    85          System.setProperty(
    86                  LogFactory.HASHTABLE_IMPLEMENTATION_PROPERTY,
    87                  CustomHashtable.class.getName());
    88          MockSecurityManager mySecurityManager = new MockSecurityManager();
    89          mySecurityManager.addPermission(new AllPermission());
    90          System.setSecurityManager(mySecurityManager);
    91
    92          try {
    93              // Use reflection so that we can control exactly when the static
    94              // initialiser for the LogFactory class is executed.
    95              Class c = this.getClass().getClassLoader().loadClass(
    96                      "org.apache.commons.logging.LogFactory");
    97              Method m = c.getMethod("getLog", new Class[] {Class.class});
    98              Log log = (Log) m.invoke(null, new Object[] {this.getClass()});
    99
    100             // Check whether we had any security exceptions so far (which were
    101             // caught by the code). We should not, as every secure operation
    102             // should be wrapped in an AccessController. Any security exceptions
    103             // indicate a path that is missing an appropriate AccessController.
    104             //
    105             // We don't wait until after the log.info call to get this count
    106             // because java.util.logging tries to load a resource bundle, which
    107             // requires permission accessClassInPackage. JCL explicitly does not
    108             // wrap calls to log methods in AccessControllers because writes to
    109             // a log file *should* only be permitted if the original caller is
    110             // trusted to access that file.
    111             int untrustedCodeCount = mySecurityManager.getUntrustedCodeCount();
    112             log.info("testing");
    113
    114             // check that the default map implementation was loaded, as JCL was
    115             // forbidden from reading the HASHTABLE_IMPLEMENTATION_PROPERTY property.
    116             System.setSecurityManager(null);
    117             Field factoryField = c.getDeclaredField("factories");
    118             factoryField.setAccessible(true);
    119             Object factoryTable = factoryField.get(null);
    120             assertNotNull(factoryTable);
    121             assertEquals(CustomHashtable.class.getName(), factoryTable.getClass().getName());
    122
    123             assertEquals(0, untrustedCodeCount);
    124         } catch(Throwable t) {
    125             // Restore original security manager so output can be generated; the
    126             // PrintWriter constructor tries to read the line.separator
    127             // system property.
    128             System.setSecurityManager(oldSecMgr);
    129             StringWriter sw = new StringWriter();
    130             PrintWriter pw = new PrintWriter(sw);
    131             t.printStackTrace(pw);
    132             fail("Unexpected exception:" + t.getMessage() + ":" + sw.toString());
    133         }
    134     }
    135 }