1/*
2 * Copyright (c) 2003, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24import javax.security.auth.callback.*;
25import java.util.*;
26import java.io.*;
27import javax.security.sasl.RealmCallback;
28import javax.security.sasl.RealmChoiceCallback;
29import com.sun.security.auth.callback.TextCallbackHandler;
30
31public final class ClientCallbackHandler extends TextCallbackHandler {
32    private String username = "john";
33    private String password = "test123";
34    private boolean auto;
35
36    public ClientCallbackHandler(boolean auto) {
37        super();
38        this.auto = auto;
39    }
40
41    public void handle(Callback[] callbacks) throws UnsupportedCallbackException,
42    IOException {
43        NameCallback ncb = null;
44        PasswordCallback pcb = null;
45        RealmChoiceCallback rccb = null;
46
47        List namePw = new ArrayList(3);
48
49        for (int i = 0; i < callbacks.length; i++) {
50            if (callbacks[i] instanceof NameCallback) {
51                if (auto) {
52                    ((NameCallback)callbacks[i]).setName(username);
53                } else {
54                    // To be processed by TextCallbackHandler
55                    namePw.add(callbacks[i]);
56                }
57            } else if (callbacks[i] instanceof PasswordCallback) {
58                if (auto) {
59                    ((PasswordCallback)callbacks[i]).setPassword(
60                        password.toCharArray());
61                } else {
62                    // To be processed by TextCallbackHandler
63                    namePw.add(callbacks[i]);
64                }
65            } else if (callbacks[i] instanceof RealmChoiceCallback) {
66                RealmChoiceCallback rcb = (RealmChoiceCallback) callbacks[i];
67                if (!auto) {
68                    System.err.println(rcb.getPrompt());
69                }
70
71                String[] choices = rcb.getChoices();
72
73                if (!auto) {
74                    for (int j=0; j < choices.length; j++) {
75                        System.err.println(j + ":" + choices[j]);
76                    }
77                }
78
79                int selection;
80                if (auto) {
81                    selection = 0;
82                } else {
83                    System.err.print("Enter choice number: ");
84                    String result = readLine();
85                    if (result.equals("")) {
86                        selection = rcb.getDefaultChoice();
87                    } else {
88                        selection = Integer.parseInt(result);
89                    }
90                }
91                rcb.setSelectedIndex(selection);
92
93            } else if (callbacks[i] instanceof RealmCallback) {
94                RealmCallback rcb = (RealmCallback) callbacks[i];
95                String realm = rcb.getDefaultText();
96
97                if (auto) {
98                    if (realm != null) {
99                        rcb.setText(realm);
100                    }
101                } else {
102                    if (realm == null) {
103                        System.err.print(rcb.getPrompt());
104                    } else {
105                        System.err.print(rcb.getPrompt() + " [" + realm + "] ");
106                    }
107
108                    System.err.flush();
109
110                    String result = readLine();
111                    if (result.equals("")) {
112                        result = realm;
113                    }
114                    rcb.setText(result);
115                }
116            } else {
117                throw new UnsupportedCallbackException(callbacks[i]);
118            }
119        }
120
121        // Process name/password callbacks using superclass
122        if (namePw.size() > 0) {
123            Callback[] np = new Callback[namePw.size()];
124            namePw.toArray(np);
125
126            super.handle(np);
127        }
128    }
129
130    /* Reads a line of input */
131    private String readLine() throws IOException {
132        return new BufferedReader
133            (new InputStreamReader(System.in)).readLine();
134    }
135}
136