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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * software distributed under the License is distributed on an<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * KIND, either express or implied. See the License for the<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * specific language governing permissions and limitations<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.shiro.web.filter.authz;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.shiro.util.StringUtils;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import javax.servlet.ServletRequest;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import javax.servlet.ServletResponse;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.regex.Pattern;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.Map;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span><a name="line.27"></a> |
| <span class="sourceLineNo">028</span>/**<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> * A Filter that can allow or deny access based on the host that sent the request.<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> *<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * <b>WARNING:</b> NOT YET FULLY IMPLEMENTED!!! Work in progress.<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> *<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * @since 1.0<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> */<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>public class HostFilter extends AuthorizationFilter {<a name="line.35"></a> |
| <span class="sourceLineNo">036</span><a name="line.36"></a> |
| <span class="sourceLineNo">037</span> public static final String IPV4_QUAD_REGEX = "(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2(?:[0-4][0-9]|5[0-5]))";<a name="line.37"></a> |
| <span class="sourceLineNo">038</span><a name="line.38"></a> |
| <span class="sourceLineNo">039</span> public static final String IPV4_REGEX = "(?:" + IPV4_QUAD_REGEX + "\\.){3}" + IPV4_QUAD_REGEX + "$";<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> public static final Pattern IPV4_PATTERN = Pattern.compile(IPV4_REGEX);<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> public static final String PRIVATE_CLASS_B_SUBSET = "(?:1[6-9]|2[0-9]|3[0-1])";<a name="line.42"></a> |
| <span class="sourceLineNo">043</span><a name="line.43"></a> |
| <span class="sourceLineNo">044</span> public static final String PRIVATE_CLASS_A_REGEX = "10\\.(?:" + IPV4_QUAD_REGEX + "\\.){2}" + IPV4_QUAD_REGEX + "$";<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> public static final String PRIVATE_CLASS_B_REGEX =<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> "172\\." + PRIVATE_CLASS_B_SUBSET + "\\." + IPV4_QUAD_REGEX + "\\." + IPV4_QUAD_REGEX + "$";<a name="line.47"></a> |
| <span class="sourceLineNo">048</span><a name="line.48"></a> |
| <span class="sourceLineNo">049</span> public static final String PRIVATE_CLASS_C_REGEX = "192\\.168\\." + IPV4_QUAD_REGEX + "\\." + IPV4_QUAD_REGEX + "$";<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> Map<String, String> authorizedIps; //user-configured IP (which can be wildcarded) to constructed regex mapping<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> Map<String, String> deniedIps;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> Map<String, String> authorizedHostnames;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> Map<String, String> deniedHostnames;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span><a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> public void setAuthorizedHosts(String authorizedHosts) {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> if (!StringUtils.hasText(authorizedHosts)) {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> throw new IllegalArgumentException("authorizedHosts argument cannot be null or empty.");<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> }<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> String[] hosts = StringUtils.tokenizeToStringArray(authorizedHosts, ", \t");<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> for (String host : hosts) {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> //replace any periods with \\. to ensure the regex works:<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> String periodsReplaced = host.replace(".", "\\.");<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> //check for IPv4:<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> String wildcardsReplaced = periodsReplaced.replace("*", IPV4_QUAD_REGEX);<a name="line.67"></a> |
| <span class="sourceLineNo">068</span><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> if (IPV4_PATTERN.matcher(wildcardsReplaced).matches()) {<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> authorizedIps.put(host, wildcardsReplaced);<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> } else {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span><a name="line.72"></a> |
| <span class="sourceLineNo">073</span> }<a name="line.73"></a> |
| <span class="sourceLineNo">074</span><a name="line.74"></a> |
| <span class="sourceLineNo">075</span><a name="line.75"></a> |
| <span class="sourceLineNo">076</span> }<a name="line.76"></a> |
| <span class="sourceLineNo">077</span><a name="line.77"></a> |
| <span class="sourceLineNo">078</span> }<a name="line.78"></a> |
| <span class="sourceLineNo">079</span><a name="line.79"></a> |
| <span class="sourceLineNo">080</span> public void setDeniedHosts(String deniedHosts) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> if (!StringUtils.hasText(deniedHosts)) {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> throw new IllegalArgumentException("deniedHosts argument cannot be null or empty.");<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> }<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> }<a name="line.84"></a> |
| <span class="sourceLineNo">085</span><a name="line.85"></a> |
| <span class="sourceLineNo">086</span> protected boolean isIpv4Candidate(String host) {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> String[] quads = StringUtils.tokenizeToStringArray(host, ".");<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> if (quads == null || quads.length != 4) {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> return false;<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> }<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> for (String quad : quads) {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> if (!quad.equals("*")) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> try {<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> Integer.parseInt(quad);<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> } catch (NumberFormatException nfe) {<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> return false;<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> }<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> }<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> return true;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> }<a name="line.101"></a> |
| <span class="sourceLineNo">102</span><a name="line.102"></a> |
| <span class="sourceLineNo">103</span> protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) throws Exception {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> throw new UnsupportedOperationException("Not yet fully implemented!!!" );<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> }<a name="line.105"></a> |
| <span class="sourceLineNo">106</span>}<a name="line.106"></a> |
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| </pre> |
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