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java/org/apache/tomcat/util/security/PermissionCheck.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.tomcat.util.security;
+
+import java.security.Permission;
+
+/**
+ * This interface is implemented by components to enable privileged code to
+ * check whether the component has a given permission.
+ * This is typically used when a privileged component (e.g. the container) is
+ * performing an action on behalf of an untrusted component (e.g. a web
+ * application) without the current thread having passed through a code source
+ * provided by the untrusted component. Because the current thread has not
+ * passed through a code source provided by the untrusted component the
+ * SecurityManager assumes the code is trusted so the standard checking
+ * mechanisms can't be used.
+ */
+public interface PermissionCheck {
+
+    /**
+     * Does this component have the given permission?
+     *
+     * @param permission The permission to test
+     *
+     * @return {@code false} if a SecurityManager is enabled and the component
+     *         does not have the given permission, otherwise {@code true}
+     */
+    boolean check(Permission permission);
+}