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| 1 | +/* | |
| 2 | + * Copyright (c) 1997, 2010, 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.security.*; | |
| 33 | +import java.util.Locale; | |
| 34 | + | |
| 35 | +import sun.security.action.GetPropertyAction; | |
| 36 | + | |
| 37 | +/** | |
| 38 | + * <code>SSLSocketFactory</code>s create <code>SSLSocket</code>s. | |
| 39 | + * | |
| 40 | + * @since 1.4 | |
| 41 | + * @see SSLSocket | |
| 42 | + * @author David Brownell | |
| 43 | + */ | |
| 44 | +public abstract class SSLSocketFactory extends SocketFactory | |
| 45 | +{ | |
| 46 | + private static SSLSocketFactory theFactory; | |
| 47 | + | |
| 48 | + private static boolean propertyChecked; | |
| 49 | + | |
| 50 | + static final boolean DEBUG; | |
| 51 | + | |
| 52 | + static { | |
| 53 | + String s = java.security.AccessController.doPrivileged( | |
| 54 | + new GetPropertyAction("javax.net.debug", "")).toLowerCase( | |
| 55 | + Locale.ENGLISH); | |
| 56 | + DEBUG = s.contains("all") || s.contains("ssl"); | |
| 57 | + } | |
| 58 | + | |
| 59 | + private static void log(String msg) { | |
| 60 | + if (DEBUG) { | |
| 61 | + System.out.println(msg); | |
| 62 | + } | |
| 63 | + } | |
| 64 | + | |
| 65 | + /** | |
| 66 | + * Constructor is used only by subclasses. | |
| 67 | + */ | |
| 68 | + public SSLSocketFactory() { | |
| 69 | + } | |
| 70 | + | |
| 71 | + /** | |
| 72 | + * Returns the default SSL socket factory. | |
| 73 | + * | |
| 74 | + * <p>The first time this method is called, the security property | |
| 75 | + * "ssl.SocketFactory.provider" is examined. If it is non-null, a class by | |
| 76 | + * that name is loaded and instantiated. If that is successful and the | |
| 77 | + * object is an instance of SSLSocketFactory, it is made the default SSL | |
| 78 | + * socket factory. | |
| 79 | + * | |
| 80 | + * <p>Otherwise, this method returns | |
| 81 | + * <code>SSLContext.getDefault().getSocketFactory()</code>. If that | |
| 82 | + * call fails, an inoperative factory is returned. | |
| 83 | + * | |
| 84 | + * @return the default <code>SocketFactory</code> | |
| 85 | + * @see SSLContext#getDefault | |
| 86 | + */ | |
| 87 | + public static synchronized SocketFactory getDefault() { | |
| 88 | + if (theFactory != null) { | |
| 89 | + return theFactory; | |
| 90 | + } | |
| 91 | + | |
| 92 | + if (propertyChecked == false) { | |
| 93 | + propertyChecked = true; | |
| 94 | + String clsName = getSecurityProperty("ssl.SocketFactory.provider"); | |
| 95 | + if (clsName != null) { | |
| 96 | + log("setting up default SSLSocketFactory"); | |
| 97 | + try { | |
| 98 | + Class cls = null; | |
| 99 | + try { | |
| 100 | + cls = Class.forName(clsName); | |
| 101 | + } catch (ClassNotFoundException e) { | |
| 102 | + ClassLoader cl = ClassLoader.getSystemClassLoader(); | |
| 103 | + if (cl != null) { | |
| 104 | + cls = cl.loadClass(clsName); | |
| 105 | + } | |
| 106 | + } | |
| 107 | + log("class " + clsName + " is loaded"); | |
| 108 | + SSLSocketFactory fac = (SSLSocketFactory)cls.newInstance(); | |
| 109 | + log("instantiated an instance of class " + clsName); | |
| 110 | + theFactory = fac; | |
| 111 | + return fac; | |
| 112 | + } catch (Exception e) { | |
| 113 | + log("SSLSocketFactory instantiation failed: " + e.toString()); | |
| 114 | + theFactory = new DefaultSSLSocketFactory(e); | |
| 115 | + return theFactory; | |
| 116 | + } | |
| 117 | + } | |
| 118 | + } | |
| 119 | + | |
| 120 | + try { | |
| 121 | + return SSLContext.getDefault().getSocketFactory(); | |
| 122 | + } catch (NoSuchAlgorithmException e) { | |
| 123 | + return new DefaultSSLSocketFactory(e); | |
| 124 | + } | |
| 125 | + } | |
| 126 | + | |
| 127 | + static String getSecurityProperty(final String name) { | |
| 128 | + return AccessController.doPrivileged(new PrivilegedAction<String>() { | |
| 129 | + public String run() { | |
| 130 | + String s = java.security.Security.getProperty(name); | |
| 131 | + if (s != null) { | |
| 132 | + s = s.trim(); | |
| 133 | + if (s.length() == 0) { | |
| 134 | + s = null; | |
| 135 | + } | |
| 136 | + } | |
| 137 | + return s; | |
| 138 | + } | |
| 139 | + }); | |
| 140 | + } | |
| 141 | + | |
| 142 | + /** | |
| 143 | + * Returns the list of cipher suites which are enabled by default. | |
| 144 | + * Unless a different list is enabled, handshaking on an SSL connection | |
| 145 | + * will use one of these cipher suites. The minimum quality of service | |
| 146 | + * for these defaults requires confidentiality protection and server | |
| 147 | + * authentication (that is, no anonymous cipher suites). | |
| 148 | + * | |
| 149 | + * @see #getSupportedCipherSuites() | |
| 150 | + * @return array of the cipher suites enabled by default | |
| 151 | + */ | |
| 152 | + public abstract String [] getDefaultCipherSuites(); | |
| 153 | + | |
| 154 | + /** | |
| 155 | + * Returns the names of the cipher suites which could be enabled for use | |
| 156 | + * on an SSL connection. Normally, only a subset of these will actually | |
| 157 | + * be enabled by default, since this list may include cipher suites which | |
| 158 | + * do not meet quality of service requirements for those defaults. Such | |
| 159 | + * cipher suites are useful in specialized applications. | |
| 160 | + * | |
| 161 | + * @see #getDefaultCipherSuites() | |
| 162 | + * @return an array of cipher suite names | |
| 163 | + */ | |
| 164 | + public abstract String [] getSupportedCipherSuites(); | |
| 165 | + | |
| 166 | + /** | |
| 167 | + * Returns a socket layered over an existing socket connected to the named | |
| 168 | + * host, at the given port. This constructor can be used when tunneling SSL | |
| 169 | + * through a proxy or when negotiating the use of SSL over an existing | |
| 170 | + * socket. The host and port refer to the logical peer destination. | |
| 171 | + * This socket is configured using the socket options established for | |
| 172 | + * this factory. | |
| 173 | + * | |
| 174 | + * @param s the existing socket | |
| 175 | + * @param host the server host | |
| 176 | + * @param port the server port | |
| 177 | + * @param autoClose close the underlying socket when this socket is closed | |
| 178 | + * @return a socket connected to the specified host and port | |
| 179 | + * @throws IOException if an I/O error occurs when creating the socket | |
| 180 | + * @throws NullPointerException if the parameter s is null | |
| 181 | + */ | |
| 182 | + public abstract Socket createSocket(Socket s, String host, | |
| 183 | + int port, boolean autoClose) | |
| 184 | + throws IOException; | |
| 185 | +} | |
| 186 | + | |
| 187 | + | |
| 188 | +// file private | |
| 189 | +class DefaultSSLSocketFactory extends SSLSocketFactory | |
| 190 | +{ | |
| 191 | + private Exception reason; | |
| 192 | + | |
| 193 | + DefaultSSLSocketFactory(Exception reason) { | |
| 194 | + this.reason = reason; | |
| 195 | + } | |
| 196 | + | |
| 197 | + private Socket throwException() throws SocketException { | |
| 198 | + throw (SocketException) | |
| 199 | + new SocketException(reason.toString()).initCause(reason); | |
| 200 | + } | |
| 201 | + | |
| 202 | + public Socket createSocket() | |
| 203 | + throws IOException | |
| 204 | + { | |
| 205 | + return throwException(); | |
| 206 | + } | |
| 207 | + | |
| 208 | + public Socket createSocket(String host, int port) | |
| 209 | + throws IOException | |
| 210 | + { | |
| 211 | + return throwException(); | |
| 212 | + } | |
| 213 | + | |
| 214 | + public Socket createSocket(Socket s, String host, | |
| 215 | + int port, boolean autoClose) | |
| 216 | + throws IOException | |
| 217 | + { | |
| 218 | + return throwException(); | |
| 219 | + } | |
| 220 | + | |
| 221 | + public Socket createSocket(InetAddress address, int port) | |
| 222 | + throws IOException | |
| 223 | + { | |
| 224 | + return throwException(); | |
| 225 | + } | |
| 226 | + | |
| 227 | + public Socket createSocket(String host, int port, | |
| 228 | + InetAddress clientAddress, int clientPort) | |
| 229 | + throws IOException | |
| 230 | + { | |
| 231 | + return throwException(); | |
| 232 | + } | |
| 233 | + | |
| 234 | + public Socket createSocket(InetAddress address, int port, | |
| 235 | + InetAddress clientAddress, int clientPort) | |
| 236 | + throws IOException | |
| 237 | + { | |
| 238 | + return throwException(); | |
| 239 | + } | |
| 240 | + | |
| 241 | + public String [] getDefaultCipherSuites() { | |
| 242 | + return new String[0]; | |
| 243 | + } | |
| 244 | + | |
| 245 | + public String [] getSupportedCipherSuites() { | |
| 246 | + return new String[0]; | |
| 247 | + } | |
| 248 | +} | |