| /* |
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.net.www.protocol.http.spnego; |
| |
| import java.io.IOException; |
| import java.net.Authenticator; |
| import java.net.PasswordAuthentication; |
| import java.util.Arrays; |
| import javax.security.auth.callback.Callback; |
| import javax.security.auth.callback.CallbackHandler; |
| import javax.security.auth.callback.NameCallback; |
| import javax.security.auth.callback.PasswordCallback; |
| import javax.security.auth.callback.UnsupportedCallbackException; |
| import sun.net.www.protocol.http.HttpCallerInfo; |
| |
| /** |
| * @since 1.6 |
| * Special callback handler used in JGSS for the HttpCaller. |
| */ |
| public class NegotiateCallbackHandler implements CallbackHandler { |
| |
| private String username; |
| private char[] password; |
| |
| /** |
| * Authenticator asks for username and password in a single prompt, |
| * but CallbackHandler checks one by one. So, no matter which callback |
| * gets handled first, make sure Authenticator is only called once. |
| */ |
| private boolean answered; |
| |
| private final HttpCallerInfo hci; |
| |
| public NegotiateCallbackHandler(HttpCallerInfo hci) { |
| this.hci = hci; |
| } |
| |
| private void getAnswer() { |
| if (!answered) { |
| answered = true; |
| PasswordAuthentication passAuth = |
| Authenticator.requestPasswordAuthentication( |
| hci.host, hci.addr, hci.port, hci.protocol, |
| hci.prompt, hci.scheme, hci.url, hci.authType); |
| /** |
| * To be compatible with existing callback handler implementations, |
| * when the underlying Authenticator is canceled, username and |
| * password are assigned null. No exception is thrown. |
| */ |
| if (passAuth != null) { |
| username = passAuth.getUserName(); |
| password = passAuth.getPassword(); |
| } |
| } |
| } |
| |
| public void handle(Callback[] callbacks) throws |
| UnsupportedCallbackException, IOException { |
| for (int i=0; i<callbacks.length; i++) { |
| Callback callBack = callbacks[i]; |
| |
| if (callBack instanceof NameCallback) { |
| getAnswer(); |
| ((NameCallback)callBack).setName(username); |
| } else if (callBack instanceof PasswordCallback) { |
| getAnswer(); |
| ((PasswordCallback)callBack).setPassword(password); |
| if (password != null) Arrays.fill(password, ' '); |
| } else { |
| throw new UnsupportedCallbackException(callBack, |
| "Call back not supported"); |
| } |
| } |
| } |
| } |