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">accessUnixDomainSocket</th>
70 * <td>The ability to accept, bind, connect or get the local address
71 * of a <i>Unix Domain</i> socket.
72 * </td>
73 * <td>Malicious code could connect to local processes using Unix domain sockets
74 * or impersonate local processes, by binding to the same pathnames (assuming they
75 * have the required Operating System permissions.</td>
76 * </tr>
77 *
78 * <tr>
79 * <th scope="row">getCookieHandler</th>
80 * <td>The ability to get the cookie handler that processes highly
81 * security sensitive cookie information for an Http session.</td>
82 * <td>Malicious code can get a cookie handler to obtain access to
83 * highly security sensitive cookie information. Some web servers
84 * use cookies to save user private information such as access
85 * control information, or to track user browsing habit.</td>
86 * </tr>
87 *
88 * <tr>
89 * <th scope="row">getNetworkInformation</th>
90 * <td>The ability to retrieve all information about local network interfaces.</td>
91 * <td>Malicious code can read information about network hardware such as
92 * MAC addresses, which could be used to construct local IPv6 addresses.</td>
93 * </tr>
94 *
95 * <tr>
96 * <th scope="row">getProxySelector</th>
97 * <td>The ability to get the proxy selector used to make decisions
98 * on which proxies to use when making network connections.</td>
99 * <td>Malicious code can get a ProxySelector to discover proxy
100 * hosts and ports on internal networks, which could then become
101 * targets for attack.</td>
102 * </tr>
103 *
104 * <tr>
105 * <th scope="row">getResponseCache</th>
106 * <td>The ability to get the response cache that provides
107 * access to a local response cache.</td>
108 * <td>Malicious code getting access to the local response cache
109 * could access security sensitive information.</td>
110 * </tr>
111 *
112 * <tr>
113 * <th scope="row">requestPasswordAuthentication</th>
114 * <td>The ability
115 * to ask the authenticator registered with the system for
116 * a password</td>
117 * <td>Malicious code may steal this password.</td>
118 * </tr>
119 *
120 * <tr>
121 * <th scope="row">setCookieHandler</th>
122 * <td>The ability to set the cookie handler that processes highly
123 * security sensitive cookie information for an Http session.</td>
124 * <td>Malicious code can set a cookie handler to obtain access to
125 * highly security sensitive cookie information. Some web servers
126 * use cookies to save user private information such as access
127 * control information, or to track user browsing habit.</td>
128 * </tr>
129 *
130 * <tr>
131 * <th scope="row">setDefaultAuthenticator</th>
132 * <td>The ability to set the
133 * way authentication information is retrieved when
134 * a proxy or HTTP server asks for authentication</td>
135 * <td>Malicious
136 * code can set an authenticator that monitors and steals user
137 * authentication input as it retrieves the input from the user.</td>
138 * </tr>
139 *
140 * <tr>
141 * <th scope="row">setProxySelector</th>
142 * <td>The ability to set the proxy selector used to make decisions
143 * on which proxies to use when making network connections.</td>
144 * <td>Malicious code can set a ProxySelector that directs network
145 * traffic to an arbitrary network host.</td>
146 * </tr>
147 *
148 * <tr>
149 * <th scope="row">setResponseCache</th>
150 * <td>The ability to set the response cache that provides access to
151 * a local response cache.</td>
152 * <td>Malicious code getting access to the local response cache
153 * could access security sensitive information, or create false
154 * entries in the response cache.</td>
155 * </tr>
156 *
157 * <tr>
158 * <th scope="row">setSocketImpl</th>
159 * <td>The ability to create a sub-class of Socket or ServerSocket with a
160 * user specified SocketImpl.</td>
161 * <td>Malicious user-defined SocketImpls can change the behavior of
162 * Socket and ServerSocket in surprising ways, by virtue of their
163 * ability to access the protected fields of SocketImpl.</td>
164 * </tr>
165 *
166 * <tr>
167 * <th scope="row">specifyStreamHandler</th>
168 * <td>The ability
169 * to specify a stream handler when constructing a URL</td>
170 * <td>Malicious code may create a URL with resources that it would
171 * normally not have access to (like file:/foo/fum/), specifying a
172 * stream handler that gets the actual bytes from someplace it does
173 * have access to. Thus it might be able to trick the system into
174 * creating a ProtectionDomain/CodeSource for a class even though
175 * that class really didn't come from that location.</td>
176 * </tr>
177 * </tbody>
178 * </table>
179 *
180 * @implNote
181 * Implementations may define additional target names, but should use naming
182 * conventions such as reverse domain name notation to avoid name clashes.
183 *
184 * @see java.security.BasicPermission
185 * @see java.security.Permission
186 * @see java.security.Permissions
187 * @see java.security.PermissionCollection
188 * @see java.lang.SecurityManager
189 *
190 *
191 * @author Marianne Mueller
192 * @author Roland Schemers
193 * @since 1.2
194 */
195
196 public final class NetPermission extends BasicPermission {
197 @java.io.Serial
198 private static final long serialVersionUID = -8343910153355041693L;
199
200 /**
201 * Creates a new NetPermission with the specified name.
202 * The name is the symbolic name of the NetPermission, such as
203 * "setDefaultAuthenticator", etc. An asterisk
204 * may appear at the end of the name, following a ".", or by itself, to
205 * signify a wildcard match.
206 *
207 * @param name the name of the NetPermission.
208 *
209 * @throws NullPointerException if {@code name} is {@code null}.
210 * @throws IllegalArgumentException if {@code name} is empty.
211 */
212
213 public NetPermission(String name)
214 {
215 super(name);
216 }
217
218 /**
219 * Creates a new NetPermission object with the specified name.
220 * The name is the symbolic name of the NetPermission, and the
221 * actions String is currently unused and should be null.
222 *
223 * @param name the name of the NetPermission.
224 * @param actions should be null.
225 *
226 * @throws NullPointerException if {@code name} is {@code null}.
227 * @throws IllegalArgumentException if {@code name} is empty.
228 */
229
230 public NetPermission(String name, String actions)
231 {
232 super(name, actions);
233 }
234 }