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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2007, 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.io.IOException; | ||
| 30 | import java.net.InetAddress; | ||
| 31 | import java.net.ServerSocket; | ||
| 32 | import java.net.SocketException; | ||
| 33 | import javax.net.ServerSocketFactory; | ||
| 34 | import java.security.*; | ||
| 35 | |||
| 36 | /** | ||
| 37 | * <code>SSLServerSocketFactory</code>s create | ||
| 38 | * <code>SSLServerSocket</code>s. | ||
| 39 | * | ||
| 40 | * @since 1.4 | ||
| 41 | * @see SSLSocket | ||
| 42 | * @see SSLServerSocket | ||
| 43 | * @author David Brownell | ||
| 44 | */ | ||
| 45 | public abstract class SSLServerSocketFactory extends ServerSocketFactory | ||
| 46 | { | ||
| 47 | private static SSLServerSocketFactory theFactory; | ||
| 48 | |||
| 49 | private static boolean propertyChecked; | ||
| 50 | |||
| 51 | private static void log(String msg) { | ||
| 52 | if (SSLSocketFactory.DEBUG) { | ||
| 53 | System.out.println(msg); | ||
| 54 | } | ||
| 55 | } | ||
| 56 | |||
| 57 | /** | ||
| 58 | * Constructor is used only by subclasses. | ||
| 59 | */ | ||
| 60 | protected SSLServerSocketFactory() { /* NOTHING */ } | ||
| 61 | |||
| 62 | /** | ||
| 63 | * Returns the default SSL server socket factory. | ||
| 64 | * | ||
| 65 | * <p>The first time this method is called, the security property | ||
| 66 | * "ssl.ServerSocketFactory.provider" is examined. If it is non-null, a | ||
| 67 | * class by that name is loaded and instantiated. If that is successful and | ||
| 68 | * the object is an instance of SSLServerSocketFactory, it is made the | ||
| 69 | * default SSL server socket factory. | ||
| 70 | * | ||
| 71 | * <p>Otherwise, this method returns | ||
| 72 | * <code>SSLContext.getDefault().getServerSocketFactory()</code>. If that | ||
| 73 | * call fails, an inoperative factory is returned. | ||
| 74 | * | ||
| 75 | * @return the default <code>ServerSocketFactory</code> | ||
| 76 | * @see SSLContext#getDefault | ||
| 77 | */ | ||
| 78 | public static synchronized ServerSocketFactory getDefault() { | ||
| 79 | if (theFactory != null) { | ||
| 80 | return theFactory; | ||
| 81 | } | ||
| 82 | |||
| 83 | if (propertyChecked == false) { | ||
| 84 | propertyChecked = true; | ||
| 85 | String clsName = SSLSocketFactory.getSecurityProperty | ||
| 86 | ("ssl.ServerSocketFactory.provider"); | ||
| 87 | if (clsName != null) { | ||
| 88 | log("setting up default SSLServerSocketFactory"); | ||
| 89 | try { | ||
| 90 | Class cls = null; | ||
| 91 | try { | ||
| 92 | cls = Class.forName(clsName); | ||
| 93 | } catch (ClassNotFoundException e) { | ||
| 94 | ClassLoader cl = ClassLoader.getSystemClassLoader(); | ||
| 95 | if (cl != null) { | ||
| 96 | cls = cl.loadClass(clsName); | ||
| 97 | } | ||
| 98 | } | ||
| 99 | log("class " + clsName + " is loaded"); | ||
| 100 | SSLServerSocketFactory fac = (SSLServerSocketFactory)cls.newInstance(); | ||
| 101 | log("instantiated an instance of class " + clsName); | ||
| 102 | theFactory = fac; | ||
| 103 | return fac; | ||
| 104 | } catch (Exception e) { | ||
| 105 | log("SSLServerSocketFactory instantiation failed: " + e); | ||
| 106 | theFactory = new DefaultSSLServerSocketFactory(e); | ||
| 107 | return theFactory; | ||
| 108 | } | ||
| 109 | } | ||
| 110 | } | ||
| 111 | |||
| 112 | try { | ||
| 113 | return SSLContext.getDefault().getServerSocketFactory(); | ||
| 114 | } catch (NoSuchAlgorithmException e) { | ||
| 115 | return new DefaultSSLServerSocketFactory(e); | ||
| 116 | } | ||
| 117 | } | ||
| 118 | |||
| 119 | /** | ||
| 120 | * Returns the list of cipher suites which are enabled by default. | ||
| 121 | * Unless a different list is enabled, handshaking on an SSL connection | ||
| 122 | * will use one of these cipher suites. The minimum quality of service | ||
| 123 | * for these defaults requires confidentiality protection and server | ||
| 124 | * authentication (that is, no anonymous cipher suites). | ||
| 125 | * | ||
| 126 | * @see #getSupportedCipherSuites() | ||
| 127 | * @return array of the cipher suites enabled by default | ||
| 128 | */ | ||
| 129 | public abstract String [] getDefaultCipherSuites(); | ||
| 130 | |||
| 131 | |||
| 132 | /** | ||
| 133 | * Returns the names of the cipher suites which could be enabled for use | ||
| 134 | * on an SSL connection created by this factory. | ||
| 135 | * Normally, only a subset of these will actually | ||
| 136 | * be enabled by default, since this list may include cipher suites which | ||
| 137 | * do not meet quality of service requirements for those defaults. Such | ||
| 138 | * cipher suites are useful in specialized applications. | ||
| 139 | * | ||
| 140 | * @return an array of cipher suite names | ||
| 141 | * @see #getDefaultCipherSuites() | ||
| 142 | */ | ||
| 143 | public abstract String [] getSupportedCipherSuites(); | ||
| 144 | } | ||
| 145 | |||
| 146 | |||
| 147 | // | ||
| 148 | // The default factory does NOTHING. | ||
| 149 | // | ||
| 150 | class DefaultSSLServerSocketFactory extends SSLServerSocketFactory { | ||
| 151 | |||
| 152 | private final Exception reason; | ||
| 153 | |||
| 154 | DefaultSSLServerSocketFactory(Exception reason) { | ||
| 155 | this.reason = reason; | ||
| 156 | } | ||
| 157 | |||
| 158 | private ServerSocket throwException() throws SocketException { | ||
| 159 | throw (SocketException) | ||
| 160 | new SocketException(reason.toString()).initCause(reason); | ||
| 161 | } | ||
| 162 | |||
| 163 | public ServerSocket createServerSocket() throws IOException { | ||
| 164 | return throwException(); | ||
| 165 | } | ||
| 166 | |||
| 167 | |||
| 168 | public ServerSocket createServerSocket(int port) | ||
| 169 | throws IOException | ||
| 170 | { | ||
| 171 | return throwException(); | ||
| 172 | } | ||
| 173 | |||
| 174 | public ServerSocket createServerSocket(int port, int backlog) | ||
| 175 | throws IOException | ||
| 176 | { | ||
| 177 | return throwException(); | ||
| 178 | } | ||
| 179 | |||
| 180 | public ServerSocket | ||
| 181 | createServerSocket(int port, int backlog, InetAddress ifAddress) | ||
| 182 | throws IOException | ||
| 183 | { | ||
| 184 | return throwException(); | ||
| 185 | } | ||
| 186 | |||
| 187 | public String [] getDefaultCipherSuites() { | ||
| 188 | return new String[0]; | ||
| 189 | } | ||
| 190 | |||
| 191 | public String [] getSupportedCipherSuites() { | ||
| 192 | return new String[0]; | ||
| 193 | } | ||
| 194 | } | ||