1 /*
   2  * Copyright 2005-2009 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 
  26 package sun.net.www.protocol.http;
  27 import java.io.IOException;
  28 import java.net.Authenticator;
  29 import java.net.PasswordAuthentication;
  30 import java.util.Arrays;
  31 import javax.security.auth.callback.Callback;
  32 import javax.security.auth.callback.CallbackHandler;
  33 import javax.security.auth.callback.NameCallback;
  34 import javax.security.auth.callback.PasswordCallback;
  35 import javax.security.auth.callback.UnsupportedCallbackException;
  36 
  37 /**
  38  * @since 1.6
  39  * Special callback handler used in JGSS for the HttpCaller.
  40  */
  41 public class NegotiateCallbackHandler implements CallbackHandler {
  42 
  43     private String username;
  44     private char[] password;
  45 
  46     private final HttpCallerInfo hci;
  47 
  48     public NegotiateCallbackHandler(HttpCallerInfo hci) {
  49         this.hci = hci;
  50     }
  51 
  52     public void handle(Callback[] callbacks) throws
  53             UnsupportedCallbackException, IOException {
  54         for (int i=0; i<callbacks.length; i++) {
  55             Callback callBack = callbacks[i];
  56 
  57             if (callBack instanceof NameCallback) {
  58                 if (username == null) {
  59                     PasswordAuthentication passAuth =
  60                             Authenticator.requestPasswordAuthentication(
  61                             hci.host, hci.addr, hci.port, hci.protocol,
  62                             hci.prompt, hci.scheme, hci.url, hci.authType);
  63                     username = passAuth.getUserName();
  64                     password = passAuth.getPassword();
  65                 }
  66                 NameCallback nameCallback =
  67                         (NameCallback)callBack;
  68                 nameCallback.setName(username);
  69 
  70             } else if (callBack instanceof PasswordCallback) {
  71                 PasswordCallback passwordCallback =
  72                         (PasswordCallback)callBack;
  73                 if (password == null) {
  74                     PasswordAuthentication passAuth =
  75                             Authenticator.requestPasswordAuthentication(
  76                             hci.host, hci.addr, hci.port, hci.protocol,
  77                             hci.prompt, hci.scheme, hci.url, hci.authType);
  78                     username = passAuth.getUserName();
  79                     password = passAuth.getPassword();
  80                 }
  81                 passwordCallback.setPassword(password);
  82                 Arrays.fill(password, ' ');
  83             } else {
  84                 throw new UnsupportedCallbackException(callBack,
  85                         "Call back not supported");
  86             }
  87         }
  88     }
  89 }