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| <pre><span class="sourceLineNo">001</span><a id="line.1">/*</a> |
| <span class="sourceLineNo">002</span><a id="line.2"> * Licensed to the Apache Software Foundation (ASF) under one</a> |
| <span class="sourceLineNo">003</span><a id="line.3"> * or more contributor license agreements. See the NOTICE file</a> |
| <span class="sourceLineNo">004</span><a id="line.4"> * distributed with this work for additional information</a> |
| <span class="sourceLineNo">005</span><a id="line.5"> * regarding copyright ownership. The ASF licenses this file</a> |
| <span class="sourceLineNo">006</span><a id="line.6"> * to you under the Apache License, Version 2.0 (the</a> |
| <span class="sourceLineNo">007</span><a id="line.7"> * "License"); you may not use this file except in compliance</a> |
| <span class="sourceLineNo">008</span><a id="line.8"> * with the License. You may obtain a copy of the License at</a> |
| <span class="sourceLineNo">009</span><a id="line.9"> *</a> |
| <span class="sourceLineNo">010</span><a id="line.10"> * http://www.apache.org/licenses/LICENSE-2.0</a> |
| <span class="sourceLineNo">011</span><a id="line.11"> *</a> |
| <span class="sourceLineNo">012</span><a id="line.12"> * Unless required by applicable law or agreed to in writing,</a> |
| <span class="sourceLineNo">013</span><a id="line.13"> * software distributed under the License is distributed on an</a> |
| <span class="sourceLineNo">014</span><a id="line.14"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</a> |
| <span class="sourceLineNo">015</span><a id="line.15"> * KIND, either express or implied. See the License for the</a> |
| <span class="sourceLineNo">016</span><a id="line.16"> * specific language governing permissions and limitations</a> |
| <span class="sourceLineNo">017</span><a id="line.17"> * under the License.</a> |
| <span class="sourceLineNo">018</span><a id="line.18"> */</a> |
| <span class="sourceLineNo">019</span><a id="line.19">package org.apache.shiro.authz.aop;</a> |
| <span class="sourceLineNo">020</span><a id="line.20"></a> |
| <span class="sourceLineNo">021</span><a id="line.21">import org.apache.shiro.authz.AuthorizationException;</a> |
| <span class="sourceLineNo">022</span><a id="line.22">import org.apache.shiro.authz.annotation.Logical;</a> |
| <span class="sourceLineNo">023</span><a id="line.23">import org.apache.shiro.authz.annotation.RequiresPermissions;</a> |
| <span class="sourceLineNo">024</span><a id="line.24">import org.apache.shiro.authz.annotation.RequiresRoles;</a> |
| <span class="sourceLineNo">025</span><a id="line.25">import org.apache.shiro.subject.Subject;</a> |
| <span class="sourceLineNo">026</span><a id="line.26"></a> |
| <span class="sourceLineNo">027</span><a id="line.27">import java.lang.annotation.Annotation;</a> |
| <span class="sourceLineNo">028</span><a id="line.28"></a> |
| <span class="sourceLineNo">029</span><a id="line.29">/**</a> |
| <span class="sourceLineNo">030</span><a id="line.30"> * Checks to see if a @{@link org.apache.shiro.authz.annotation.RequiresPermissions RequiresPermissions} annotation is</a> |
| <span class="sourceLineNo">031</span><a id="line.31"> * declared, and if so, performs a permission check to see if the calling <code>Subject</code> is allowed continued</a> |
| <span class="sourceLineNo">032</span><a id="line.32"> * access.</a> |
| <span class="sourceLineNo">033</span><a id="line.33"> *</a> |
| <span class="sourceLineNo">034</span><a id="line.34"> * @since 0.9.0</a> |
| <span class="sourceLineNo">035</span><a id="line.35"> */</a> |
| <span class="sourceLineNo">036</span><a id="line.36">public class PermissionAnnotationHandler extends AuthorizingAnnotationHandler {</a> |
| <span class="sourceLineNo">037</span><a id="line.37"></a> |
| <span class="sourceLineNo">038</span><a id="line.38"> /**</a> |
| <span class="sourceLineNo">039</span><a id="line.39"> * Default no-argument constructor that ensures this handler looks for</a> |
| <span class="sourceLineNo">040</span><a id="line.40"> * {@link org.apache.shiro.authz.annotation.RequiresPermissions RequiresPermissions} annotations.</a> |
| <span class="sourceLineNo">041</span><a id="line.41"> */</a> |
| <span class="sourceLineNo">042</span><a id="line.42"> public PermissionAnnotationHandler() {</a> |
| <span class="sourceLineNo">043</span><a id="line.43"> super(RequiresPermissions.class);</a> |
| <span class="sourceLineNo">044</span><a id="line.44"> }</a> |
| <span class="sourceLineNo">045</span><a id="line.45"></a> |
| <span class="sourceLineNo">046</span><a id="line.46"> /**</a> |
| <span class="sourceLineNo">047</span><a id="line.47"> * Returns the annotation {@link RequiresPermissions#value value}, from which the Permission will be constructed.</a> |
| <span class="sourceLineNo">048</span><a id="line.48"> *</a> |
| <span class="sourceLineNo">049</span><a id="line.49"> * @param a the RequiresPermissions annotation being inspected.</a> |
| <span class="sourceLineNo">050</span><a id="line.50"> * @return the annotation's <code>value</code>, from which the Permission will be constructed.</a> |
| <span class="sourceLineNo">051</span><a id="line.51"> */</a> |
| <span class="sourceLineNo">052</span><a id="line.52"> protected String[] getAnnotationValue(Annotation a) {</a> |
| <span class="sourceLineNo">053</span><a id="line.53"> RequiresPermissions rpAnnotation = (RequiresPermissions) a;</a> |
| <span class="sourceLineNo">054</span><a id="line.54"> return rpAnnotation.value();</a> |
| <span class="sourceLineNo">055</span><a id="line.55"> }</a> |
| <span class="sourceLineNo">056</span><a id="line.56"></a> |
| <span class="sourceLineNo">057</span><a id="line.57"> /**</a> |
| <span class="sourceLineNo">058</span><a id="line.58"> * Ensures that the calling <code>Subject</code> has the Annotation's specified permissions, and if not, throws an</a> |
| <span class="sourceLineNo">059</span><a id="line.59"> * <code>AuthorizingException</code> indicating access is denied.</a> |
| <span class="sourceLineNo">060</span><a id="line.60"> *</a> |
| <span class="sourceLineNo">061</span><a id="line.61"> * @param a the RequiresPermission annotation being inspected to check for one or more permissions</a> |
| <span class="sourceLineNo">062</span><a id="line.62"> * @throws org.apache.shiro.authz.AuthorizationException</a> |
| <span class="sourceLineNo">063</span><a id="line.63"> * if the calling <code>Subject</code> does not have the permission(s) necessary to</a> |
| <span class="sourceLineNo">064</span><a id="line.64"> * continue access or execution.</a> |
| <span class="sourceLineNo">065</span><a id="line.65"> */</a> |
| <span class="sourceLineNo">066</span><a id="line.66"> public void assertAuthorized(Annotation a) throws AuthorizationException {</a> |
| <span class="sourceLineNo">067</span><a id="line.67"> if (!(a instanceof RequiresPermissions)) return;</a> |
| <span class="sourceLineNo">068</span><a id="line.68"></a> |
| <span class="sourceLineNo">069</span><a id="line.69"> RequiresPermissions rpAnnotation = (RequiresPermissions) a;</a> |
| <span class="sourceLineNo">070</span><a id="line.70"> String[] perms = getAnnotationValue(a);</a> |
| <span class="sourceLineNo">071</span><a id="line.71"> Subject subject = getSubject();</a> |
| <span class="sourceLineNo">072</span><a id="line.72"></a> |
| <span class="sourceLineNo">073</span><a id="line.73"> if (perms.length == 1) {</a> |
| <span class="sourceLineNo">074</span><a id="line.74"> subject.checkPermission(perms[0]);</a> |
| <span class="sourceLineNo">075</span><a id="line.75"> return;</a> |
| <span class="sourceLineNo">076</span><a id="line.76"> }</a> |
| <span class="sourceLineNo">077</span><a id="line.77"> if (Logical.AND.equals(rpAnnotation.logical())) {</a> |
| <span class="sourceLineNo">078</span><a id="line.78"> getSubject().checkPermissions(perms);</a> |
| <span class="sourceLineNo">079</span><a id="line.79"> return;</a> |
| <span class="sourceLineNo">080</span><a id="line.80"> }</a> |
| <span class="sourceLineNo">081</span><a id="line.81"> if (Logical.OR.equals(rpAnnotation.logical())) {</a> |
| <span class="sourceLineNo">082</span><a id="line.82"> // Avoid processing exceptions unnecessarily - "delay" throwing the exception by calling hasRole first</a> |
| <span class="sourceLineNo">083</span><a id="line.83"> boolean hasAtLeastOnePermission = false;</a> |
| <span class="sourceLineNo">084</span><a id="line.84"> for (String permission : perms) if (getSubject().isPermitted(permission)) hasAtLeastOnePermission = true;</a> |
| <span class="sourceLineNo">085</span><a id="line.85"> // Cause the exception if none of the role match, note that the exception message will be a bit misleading</a> |
| <span class="sourceLineNo">086</span><a id="line.86"> if (!hasAtLeastOnePermission) getSubject().checkPermission(perms[0]);</a> |
| <span class="sourceLineNo">087</span><a id="line.87"> </a> |
| <span class="sourceLineNo">088</span><a id="line.88"> }</a> |
| <span class="sourceLineNo">089</span><a id="line.89"> }</a> |
| <span class="sourceLineNo">090</span><a id="line.90">}</a> |
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