NetPermission.java revision 10539:63bb5a761856
1/* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package java.net; 27 28import java.security.*; 29import java.util.Enumeration; 30import java.util.Hashtable; 31import java.util.StringTokenizer; 32 33/** 34 * This class is for various network permissions. 35 * A NetPermission contains a name (also referred to as a "target name") but 36 * no actions list; you either have the named permission 37 * or you don't. 38 * <P> 39 * The target name is the name of the network permission (see below). The naming 40 * convention follows the hierarchical property naming convention. 41 * Also, an asterisk 42 * may appear at the end of the name, following a ".", or by itself, to 43 * signify a wildcard match. For example: "foo.*" and "*" signify a wildcard 44 * match, while "*foo" and "a*b" do not. 45 * <P> 46 * The following table lists all the possible NetPermission target names, 47 * and for each provides a description of what the permission allows 48 * and a discussion of the risks of granting code the permission. 49 * 50 * <table border=1 cellpadding=5 summary="Permission target name, what the permission allows, and associated risks"> 51 * <tr> 52 * <th>Permission Target Name</th> 53 * <th>What the Permission Allows</th> 54 * <th>Risks of Allowing this Permission</th> 55 * </tr> 56 * <tr> 57 * <td>allowHttpTrace</td> 58 * <td>The ability to use the HTTP TRACE method in HttpURLConnection.</td> 59 * <td>Malicious code using HTTP TRACE could get access to security sensitive 60 * information in the HTTP headers (such as cookies) that it might not 61 * otherwise have access to.</td> 62 * </tr> 63 * 64 * <tr> 65 * <td>getCookieHandler</td> 66 * <td>The ability to get the cookie handler that processes highly 67 * security sensitive cookie information for an Http session.</td> 68 * <td>Malicious code can get a cookie handler to obtain access to 69 * highly security sensitive cookie information. Some web servers 70 * use cookies to save user private information such as access 71 * control information, or to track user browsing habit.</td> 72 * </tr> 73 * 74 * <tr> 75 * <td>getNetworkInformation</td> 76 * <td>The ability to retrieve all information about local network interfaces.</td> 77 * <td>Malicious code can read information about network hardware such as 78 * MAC addresses, which could be used to construct local IPv6 addresses.</td> 79 * </tr> 80 * 81 * <tr> 82 * <td>getProxySelector</td> 83 * <td>The ability to get the proxy selector used to make decisions 84 * on which proxies to use when making network connections.</td> 85 * <td>Malicious code can get a ProxySelector to discover proxy 86 * hosts and ports on internal networks, which could then become 87 * targets for attack.</td> 88 * </tr> 89 * 90 * <tr> 91 * <td>getResponseCache</td> 92 * <td>The ability to get the response cache that provides 93 * access to a local response cache.</td> 94 * <td>Malicious code getting access to the local response cache 95 * could access security sensitive information.</td> 96 * </tr> 97 * 98 * <tr> 99 * <td>requestPasswordAuthentication</td> 100 * <td>The ability 101 * to ask the authenticator registered with the system for 102 * a password</td> 103 * <td>Malicious code may steal this password.</td> 104 * </tr> 105 * 106 * <tr> 107 * <td>setCookieHandler</td> 108 * <td>The ability to set the cookie handler that processes highly 109 * security sensitive cookie information for an Http session.</td> 110 * <td>Malicious code can set a cookie handler to obtain access to 111 * highly security sensitive cookie information. Some web servers 112 * use cookies to save user private information such as access 113 * control information, or to track user browsing habit.</td> 114 * </tr> 115 * 116 * <tr> 117 * <td>setDefaultAuthenticator</td> 118 * <td>The ability to set the 119 * way authentication information is retrieved when 120 * a proxy or HTTP server asks for authentication</td> 121 * <td>Malicious 122 * code can set an authenticator that monitors and steals user 123 * authentication input as it retrieves the input from the user.</td> 124 * </tr> 125 * 126 * <tr> 127 * <td>setProxySelector</td> 128 * <td>The ability to set the proxy selector used to make decisions 129 * on which proxies to use when making network connections.</td> 130 * <td>Malicious code can set a ProxySelector that directs network 131 * traffic to an arbitrary network host.</td> 132 * </tr> 133 * 134 * <tr> 135 * <td>setResponseCache</td> 136 * <td>The ability to set the response cache that provides access to 137 * a local response cache.</td> 138 * <td>Malicious code getting access to the local response cache 139 * could access security sensitive information, or create false 140 * entries in the response cache.</td> 141 * </tr> 142 * 143 * <tr> 144 * <td>specifyStreamHandler</td> 145 * <td>The ability 146 * to specify a stream handler when constructing a URL</td> 147 * <td>Malicious code may create a URL with resources that it would 148 * normally not have access to (like file:/foo/fum/), specifying a 149 * stream handler that gets the actual bytes from someplace it does 150 * have access to. Thus it might be able to trick the system into 151 * creating a ProtectionDomain/CodeSource for a class even though 152 * that class really didn't come from that location.</td> 153 * </tr> 154 * </table> 155 * 156 * @see java.security.BasicPermission 157 * @see java.security.Permission 158 * @see java.security.Permissions 159 * @see java.security.PermissionCollection 160 * @see java.lang.SecurityManager 161 * 162 * 163 * @author Marianne Mueller 164 * @author Roland Schemers 165 */ 166 167public final class NetPermission extends BasicPermission { 168 private static final long serialVersionUID = -8343910153355041693L; 169 170 /** 171 * Creates a new NetPermission with the specified name. 172 * The name is the symbolic name of the NetPermission, such as 173 * "setDefaultAuthenticator", etc. An asterisk 174 * may appear at the end of the name, following a ".", or by itself, to 175 * signify a wildcard match. 176 * 177 * @param name the name of the NetPermission. 178 * 179 * @throws NullPointerException if {@code name} is {@code null}. 180 * @throws IllegalArgumentException if {@code name} is empty. 181 */ 182 183 public NetPermission(String name) 184 { 185 super(name); 186 } 187 188 /** 189 * Creates a new NetPermission object with the specified name. 190 * The name is the symbolic name of the NetPermission, and the 191 * actions String is currently unused and should be null. 192 * 193 * @param name the name of the NetPermission. 194 * @param actions should be null. 195 * 196 * @throws NullPointerException if {@code name} is {@code null}. 197 * @throws IllegalArgumentException if {@code name} is empty. 198 */ 199 200 public NetPermission(String name, String actions) 201 { 202 super(name, actions); 203 } 204} 205