1 /*
2 * Copyright (c) 1997, 2012, 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
27 package javax.net.ssl;
28
29 import java.net.*;
30 import javax.net.SocketFactory;
31 import java.io.IOException;
32 import java.io.InputStream;
33 import java.security.*;
34 import java.util.Locale;
35
36 import sun.security.action.GetPropertyAction;
37
38 /**
39 * <code>SSLSocketFactory</code>s create <code>SSLSocket</code>s.
40 *
41 * @since 1.4
42 * @see SSLSocket
43 * @author David Brownell
44 */
45 public abstract class SSLSocketFactory extends SocketFactory
46 {
47 private static SSLSocketFactory theFactory;
48
49 private static boolean propertyChecked;
50
51 static final boolean DEBUG;
52
53 static {
54 String s = GetPropertyAction.getProperty("javax.net.debug", "")
55 .toLowerCase(Locale.ENGLISH);
56
57 DEBUG = s.contains("all") || s.contains("ssl");
58 }
59
60 private static void log(String msg) {
61 if (DEBUG) {
62 System.out.println(msg);
63 }
64 }
65
66 /**
67 * Constructor is used only by subclasses.
68 */
69 public SSLSocketFactory() {
70 }
71
72 /**
73 * Returns the default SSL socket factory.
74 *
75 * <p>The first time this method is called, the security property
76 * "ssl.SocketFactory.provider" is examined. If it is non-null, a class by
77 * that name is loaded and instantiated. If that is successful and the
78 * object is an instance of SSLSocketFactory, it is made the default SSL
79 * socket factory.
80 *
81 * <p>Otherwise, this method returns
82 * <code>SSLContext.getDefault().getSocketFactory()</code>. If that
83 * call fails, an inoperative factory is returned.
84 *
85 * @return the default <code>SocketFactory</code>
86 * @see SSLContext#getDefault
87 */
88 public static synchronized SocketFactory getDefault() {
89 if (theFactory != null) {
90 return theFactory;
91 }
92
93 if (propertyChecked == false) {
94 propertyChecked = true;
95 String clsName = getSecurityProperty("ssl.SocketFactory.provider");
96 if (clsName != null) {
97 log("setting up default SSLSocketFactory");
98 try {
99 Class<?> cls = null;
100 try {
101 cls = Class.forName(clsName);
102 } catch (ClassNotFoundException e) {
103 ClassLoader cl = ClassLoader.getSystemClassLoader();
104 if (cl != null) {
105 cls = cl.loadClass(clsName);
106 }
107 }
108 log("class " + clsName + " is loaded");
109 @SuppressWarnings("deprecation")
110 SSLSocketFactory fac = (SSLSocketFactory)cls.newInstance();
111 log("instantiated an instance of class " + clsName);
112 theFactory = fac;
113 return fac;
114 } catch (Exception e) {
115 log("SSLSocketFactory instantiation failed: " + e.toString());
116 theFactory = new DefaultSSLSocketFactory(e);
117 return theFactory;
118 }
119 }
120 }
121
122 try {
123 return SSLContext.getDefault().getSocketFactory();
124 } catch (NoSuchAlgorithmException e) {
125 return new DefaultSSLSocketFactory(e);
126 }
127 }
128
129 static String getSecurityProperty(final String name) {
130 return AccessController.doPrivileged(new PrivilegedAction<>() {
131 @Override
132 public String run() {
133 String s = java.security.Security.getProperty(name);
134 if (s != null) {
135 s = s.trim();
136 if (s.length() == 0) {
137 s = null;
138 }
139 }
140 return s;
141 }
142 });
143 }
144
145 /**
146 * Returns the list of cipher suites which are enabled by default.
147 * Unless a different list is enabled, handshaking on an SSL connection
148 * will use one of these cipher suites. The minimum quality of service
149 * for these defaults requires confidentiality protection and server
150 * authentication (that is, no anonymous cipher suites).
151 *
152 * @see #getSupportedCipherSuites()
153 * @return array of the cipher suites enabled by default
154 */
155 public abstract String [] getDefaultCipherSuites();
156
157 /**
158 * Returns the names of the cipher suites which could be enabled for use
159 * on an SSL connection. Normally, only a subset of these will actually
160 * be enabled by default, since this list may include cipher suites which
161 * do not meet quality of service requirements for those defaults. Such
162 * cipher suites are useful in specialized applications.
163 *
164 * @see #getDefaultCipherSuites()
165 * @return an array of cipher suite names
166 */
167 public abstract String [] getSupportedCipherSuites();
168
169 /**
170 * Returns a socket layered over an existing socket connected to the named
171 * host, at the given port. This constructor can be used when tunneling SSL
172 * through a proxy or when negotiating the use of SSL over an existing
173 * socket. The host and port refer to the logical peer destination.
174 * This socket is configured using the socket options established for
175 * this factory.
176 *
177 * @param s the existing socket
178 * @param host the server host
179 * @param port the server port
180 * @param autoClose close the underlying socket when this socket is closed
181 * @return a socket connected to the specified host and port
182 * @throws IOException if an I/O error occurs when creating the socket
183 * @throws NullPointerException if the parameter s is null
184 */
185 public abstract Socket createSocket(Socket s, String host,
186 int port, boolean autoClose) throws IOException;
187
188 /**
189 * Creates a server mode {@link Socket} layered over an
190 * existing connected socket, and is able to read data which has
191 * already been consumed/removed from the {@link Socket}'s
192 * underlying {@link InputStream}.
193 * <p>
194 * This method can be used by a server application that needs to
195 * observe the inbound data but still create valid SSL/TLS
196 * connections: for example, inspection of Server Name Indication
197 * (SNI) extensions (See section 3 of <A
198 * HREF="http://www.ietf.org/rfc/rfc6066.txt">TLS Extensions
199 * (RFC6066)</A>). Data that has been already removed from the
200 * underlying {@link InputStream} should be loaded into the
201 * {@code consumed} stream before this method is called, perhaps
202 * using a {@link java.io.ByteArrayInputStream}. When this
203 * {@link Socket} begins handshaking, it will read all of the data in
204 * {@code consumed} until it reaches {@code EOF}, then all further
205 * data is read from the underlying {@link InputStream} as
206 * usual.
207 * <p>
208 * The returned socket is configured using the socket options
209 * established for this factory, and is set to use server mode when
210 * handshaking (see {@link SSLSocket#setUseClientMode(boolean)}).
211 *
212 * @param s
213 * the existing socket
214 * @param consumed
215 * the consumed inbound network data that has already been
216 * removed from the existing {@link Socket}
217 * {@link InputStream}. This parameter may be
218 * {@code null} if no data has been removed.
219 * @param autoClose close the underlying socket when this socket is closed.
220 *
221 * @return the {@link Socket} compliant with the socket options
222 * established for this factory
223 *
224 * @throws IOException if an I/O error occurs when creating the socket
225 * @throws UnsupportedOperationException if the underlying provider
226 * does not implement the operation
227 * @throws NullPointerException if {@code s} is {@code null}
228 *
229 * @since 1.8
230 */
231 public Socket createSocket(Socket s, InputStream consumed,
232 boolean autoClose) throws IOException {
233 throw new UnsupportedOperationException();
234 }
235 }
236
237
238 // file private
239 class DefaultSSLSocketFactory extends SSLSocketFactory
240 {
241 private Exception reason;
242
243 DefaultSSLSocketFactory(Exception reason) {
244 this.reason = reason;
245 }
246
247 private Socket throwException() throws SocketException {
248 throw (SocketException)
249 new SocketException(reason.toString()).initCause(reason);
250 }
251
252 @Override
253 public Socket createSocket()
254 throws IOException
255 {
256 return throwException();
257 }
258
259 @Override
260 public Socket createSocket(String host, int port)
261 throws IOException
262 {
263 return throwException();
264 }
265
266 @Override
267 public Socket createSocket(Socket s, String host,
268 int port, boolean autoClose)
269 throws IOException
270 {
271 return throwException();
272 }
273
274 @Override
275 public Socket createSocket(InetAddress address, int port)
276 throws IOException
277 {
278 return throwException();
279 }
280
281 @Override
282 public Socket createSocket(String host, int port,
283 InetAddress clientAddress, int clientPort)
284 throws IOException
285 {
286 return throwException();
287 }
288
289 @Override
290 public Socket createSocket(InetAddress address, int port,
291 InetAddress clientAddress, int clientPort)
292 throws IOException
293 {
294 return throwException();
295 }
296
297 @Override
298 public String [] getDefaultCipherSuites() {
299 return new String[0];
300 }
301
302 @Override
303 public String [] getSupportedCipherSuites() {
304 return new String[0];
305 }
306 }