Add a skeleton security policy.

For now this just allows everything (including replacing the
SecurityManager/Policy...) but we can start restricting things
later.

Change-Id: I3627bf06bd35fcebfb42bdc563617b830a999aaa
Reviewed-on: http://gerrit.dmdirc.com/3567
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

src/com/dmdirc/DMDircSecurityPolicy.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2006-2014 DMDirc Developers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc;
+
+import java.security.CodeSource;
+import java.security.Permission;
+import java.security.PermissionCollection;
+import java.security.Policy;
+import java.security.ProtectionDomain;
+
+/**
+ * Security policy used by DMDirc.
+ */
+public class DMDircSecurityPolicy extends Policy {
+
+    @Override
+    public boolean implies(final ProtectionDomain domain, final Permission permission) {
+        return true;
+    }
+
+    @Override
+    public PermissionCollection getPermissions(final ProtectionDomain domain) {
+        return UNSUPPORTED_EMPTY_COLLECTION;
+    }
+
+    @Override
+    public PermissionCollection getPermissions(final CodeSource codesource) {
+        return UNSUPPORTED_EMPTY_COLLECTION;
+    }
+
+}

src/com/dmdirc/Main.java

@@ -47,6 +47,7 @@ import com.dmdirc.ui.WarningDialog;
 import com.google.common.eventbus.EventBus;
 
 import java.awt.GraphicsEnvironment;
+import java.security.Policy;
 import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
@@ -150,6 +151,13 @@ public class Main {
     public static void main(final String[] args) {
         Thread.setDefaultUncaughtExceptionHandler(new DMDircExceptionHandler());
 
+        try {
+            Policy.setPolicy(new DMDircSecurityPolicy());
+            System.setSecurityManager(new SecurityManager());
+        } catch (SecurityException ex) {
+            Logger.appError(ErrorLevel.HIGH, "Unable to set security policy", ex);
+        }
+
         try {
             ClientModule clientModule = new ClientModule();
             final ObjectGraph graph = ObjectGraph.create(clientModule);