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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 | } | ||