1 /* 2 * Copyright 2009 Sun Microsystems, Inc. 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. Sun designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 22 * CA 95054 USA or visit www.sun.com if you need additional information or 23 * have any questions. 24 */ 25 package sun.net.www.protocol.http; 26 27 import java.net.URL; 28 import java.net.PasswordAuthentication; 29 import java.lang.reflect.Constructor; 30 import java.lang.reflect.Method; 31 import sun.util.logging.PlatformLogger; 32 33 /** 34 * Proxy class for loading NTLMAuthentication, so as to remove static 35 * dependancy. 36 */ 37 class NTLMAuthenticationProxy { 38 private static Method supportsTA; 39 private static final String clazzStr = "sun.net.www.protocol.http.ntlm.NTLMAuthentication"; 40 private static final String supportsTAStr = "supportsTransparentAuth"; 41 42 static final NTLMAuthenticationProxy proxy = tryLoadNTLMAuthentication(); 43 static final boolean supported = proxy != null ? true : false; 44 static final boolean supportsTransparentAuth = supported ? supportsTransparentAuth(supportsTA) : false; 45 46 private final Constructor<? extends AuthenticationInfo> threeArgCtr; 47 private final Constructor<? extends AuthenticationInfo> fiveArgCtr; 48 49 private NTLMAuthenticationProxy(Constructor<? extends AuthenticationInfo> threeArgCtr, 50 Constructor<? extends AuthenticationInfo> fiveArgCtr) { 51 this.threeArgCtr = threeArgCtr; 52 this.fiveArgCtr = fiveArgCtr; 53 } 54 55 56 AuthenticationInfo create(boolean isProxy, 57 URL url, 58 PasswordAuthentication pw) { 59 try { 60 return threeArgCtr.newInstance(isProxy, url, pw); 61 } catch (ReflectiveOperationException roe) { 62 finest(roe); 63 } 64 65 return null; 66 } 67 68 AuthenticationInfo create(boolean isProxy, 69 String host, 70 int port, 71 PasswordAuthentication pw) { 72 try { 73 return fiveArgCtr.newInstance(isProxy, host, port, pw); 74 } catch (ReflectiveOperationException roe) { 75 finest(roe); 76 } 77 78 return null; 79 } 80 81 /* Returns true if the NTLM implementation supports transparent 82 * authentication (try with the current users credentials before 83 * prompting for username and password, etc). 84 */ 85 private static boolean supportsTransparentAuth(Method method) { 86 try { 87 return (Boolean)method.invoke(null); 88 } catch (ReflectiveOperationException roe) { 89 finest(roe); 90 } 91 92 return false; 93 } 94 95 /** 96 * Loads the NTLM authentiation implementation through reflection. If 97 * the class is present, then it must have the required constructors and 98 * method. Otherwise, it is considered an error. 99 */ 100 @SuppressWarnings("unchecked") 101 private static NTLMAuthenticationProxy tryLoadNTLMAuthentication() { 102 Class<? extends AuthenticationInfo> cl; 103 Constructor<? extends AuthenticationInfo> threeArg, fiveArg; 104 try { 105 cl = (Class<? extends AuthenticationInfo>)Class.forName(clazzStr, true, null); 106 if (cl != null) { 107 threeArg = cl.getConstructor(boolean.class, 108 URL.class, 109 PasswordAuthentication.class); 110 fiveArg = cl.getConstructor(boolean.class, 111 String.class, 112 int.class, 113 PasswordAuthentication.class); 114 supportsTA = cl.getDeclaredMethod(supportsTAStr); 115 return new NTLMAuthenticationProxy(threeArg, 116 fiveArg); 117 } 118 } catch (ClassNotFoundException cnfe) { 119 finest(cnfe); 120 } catch (ReflectiveOperationException roe) { 121 throw new AssertionError(roe); 122 } 123 124 return null; 125 } 126 127 static void finest(Exception e) { 128 PlatformLogger logger = HttpURLConnection.getHttpLogger(); 129 logger.finest("NTLMAuthenticationProxy: " + e); 130 } 131 }