1 /*
2 * Copyright (c) 1997, 2020, 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
26 package java.net;
27
28 import java.security.*;
29 import java.util.Enumeration;
30 import java.util.Hashtable;
31 import 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 the standard 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 class="striped">
51 * <caption style="display:none">Permission target name, what the permission allows, and associated risks</caption>
52 * <thead>
53 * <tr>
54 * <th scope="col">Permission Target Name</th>
55 * <th scope="col">What the Permission Allows</th>
56 * <th scope="col">Risks of Allowing this Permission</th>
57 * </tr>
58 * </thead>
59 * <tbody>
60 * <tr>
61 * <th scope="row">allowHttpTrace</th>
62 * <td>The ability to use the HTTP TRACE method in HttpURLConnection.</td>
63 * <td>Malicious code using HTTP TRACE could get access to security sensitive
64 * information in the HTTP headers (such as cookies) that it might not
65 * otherwise have access to.</td>
66 * </tr>
67 *
68 * <tr>
69 * <th scope="row">getCookieHandler</th>
70 * <td>The ability to get the cookie handler that processes highly
71 * security sensitive cookie information for an Http session.</td>
72 * <td>Malicious code can get a cookie handler to obtain access to
73 * highly security sensitive cookie information. Some web servers
74 * use cookies to save user private information such as access
75 * control information, or to track user browsing habit.</td>
76 * </tr>
77 *
78 * <tr>
79 * <th scope="row">getNetworkInformation</th>
80 * <td>The ability to retrieve all information about local network interfaces.</td>
81 * <td>Malicious code can read information about network hardware such as
82 * MAC addresses, which could be used to construct local IPv6 addresses.</td>
83 * </tr>
84 *
85 * <tr>
86 * <th scope="row">getProxySelector</th>
87 * <td>The ability to get the proxy selector used to make decisions
88 * on which proxies to use when making network connections.</td>
89 * <td>Malicious code can get a ProxySelector to discover proxy
90 * hosts and ports on internal networks, which could then become
91 * targets for attack.</td>
92 * </tr>
93 *
94 * <tr>
95 * <th scope="row">getResponseCache</th>
96 * <td>The ability to get the response cache that provides
97 * access to a local response cache.</td>
98 * <td>Malicious code getting access to the local response cache
99 * could access security sensitive information.</td>
100 * </tr>
101 *
102 * <tr>
103 * <th scope="row">requestPasswordAuthentication</th>
104 * <td>The ability
105 * to ask the authenticator registered with the system for
106 * a password</td>
107 * <td>Malicious code may steal this password.</td>
108 * </tr>
109 *
110 * <tr>
111 * <th scope="row">setCookieHandler</th>
112 * <td>The ability to set the cookie handler that processes highly
113 * security sensitive cookie information for an Http session.</td>
114 * <td>Malicious code can set a cookie handler to obtain access to
115 * highly security sensitive cookie information. Some web servers
116 * use cookies to save user private information such as access
117 * control information, or to track user browsing habit.</td>
118 * </tr>
119 *
120 * <tr>
121 * <th scope="row">setDefaultAuthenticator</th>
122 * <td>The ability to set the
123 * way authentication information is retrieved when
124 * a proxy or HTTP server asks for authentication</td>
125 * <td>Malicious
126 * code can set an authenticator that monitors and steals user
127 * authentication input as it retrieves the input from the user.</td>
128 * </tr>
129 *
130 * <tr>
131 * <th scope="row">setProxySelector</th>
132 * <td>The ability to set the proxy selector used to make decisions
133 * on which proxies to use when making network connections.</td>
134 * <td>Malicious code can set a ProxySelector that directs network
135 * traffic to an arbitrary network host.</td>
136 * </tr>
137 *
138 * <tr>
139 * <th scope="row">setResponseCache</th>
140 * <td>The ability to set the response cache that provides access to
141 * a local response cache.</td>
142 * <td>Malicious code getting access to the local response cache
143 * could access security sensitive information, or create false
144 * entries in the response cache.</td>
145 * </tr>
146 *
147 * <tr>
148 * <th scope="row">setSocketImpl</th>
149 * <td>The ability to create a sub-class of Socket or ServerSocket with a
150 * user specified SocketImpl.</td>
151 * <td>Malicious user-defined SocketImpls can change the behavior of
152 * Socket and ServerSocket in surprising ways, by virtue of their
153 * ability to access the protected fields of SocketImpl.</td>
154 * </tr>
155 *
156 * <tr>
157 * <th scope="row">specifyStreamHandler</th>
158 * <td>The ability
159 * to specify a stream handler when constructing a URL</td>
160 * <td>Malicious code may create a URL with resources that it would
161 * normally not have access to (like file:/foo/fum/), specifying a
162 * stream handler that gets the actual bytes from someplace it does
163 * have access to. Thus it might be able to trick the system into
164 * creating a ProtectionDomain/CodeSource for a class even though
165 * that class really didn't come from that location.</td>
166 * </tr>
167 * </tbody>
168 * </table>
169 *
170 * @implNote
171 * Implementations may define additional target names, but should use naming
172 * conventions such as reverse domain name notation to avoid name clashes.
173 *
174 * @see java.security.BasicPermission
175 * @see java.security.Permission
176 * @see java.security.Permissions
177 * @see java.security.PermissionCollection
178 * @see java.lang.SecurityManager
179 *
180 *
181 * @author Marianne Mueller
182 * @author Roland Schemers
183 * @since 1.2
184 */
185
186 public final class NetPermission extends BasicPermission {
187 @java.io.Serial
188 private static final long serialVersionUID = -8343910153355041693L;
189
190 /**
191 * Creates a new NetPermission with the specified name.
192 * The name is the symbolic name of the NetPermission, such as
193 * "setDefaultAuthenticator", etc. An asterisk
194 * may appear at the end of the name, following a ".", or by itself, to
195 * signify a wildcard match.
196 *
197 * @param name the name of the NetPermission.
198 *
199 * @throws NullPointerException if {@code name} is {@code null}.
200 * @throws IllegalArgumentException if {@code name} is empty.
201 */
202
203 public NetPermission(String name)
204 {
205 super(name);
206 }
207
208 /**
209 * Creates a new NetPermission object with the specified name.
210 * The name is the symbolic name of the NetPermission, and the
211 * actions String is currently unused and should be null.
212 *
213 * @param name the name of the NetPermission.
214 * @param actions should be null.
215 *
216 * @throws NullPointerException if {@code name} is {@code null}.
217 * @throws IllegalArgumentException if {@code name} is empty.
218 */
219
220 public NetPermission(String name, String actions)
221 {
222 super(name, actions);
223 }
224 }