1 /* $OpenBSD: auth2-kbdint.c,v 1.11 2019/11/13 04:47:52 deraadt Exp $ */
2 /*
3 * Copyright (c) 2000 Markus Friedl. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "includes.h"
27
28 #include <sys/types.h>
29
30 #include <stdlib.h>
31 #include <stdio.h>
32 #include <stdarg.h>
33
34 #include "xmalloc.h"
35 #include "packet.h"
36 #include "hostfile.h"
37 #include "auth.h"
38 #include "log.h"
39 #include "misc.h"
40 #include "servconf.h"
41 #include "ssherr.h"
42
43 /* import */
44 extern ServerOptions options;
45
46 static int
userauth_kbdint(struct ssh * ssh)47 userauth_kbdint(struct ssh *ssh)
48 {
49 int r, authenticated = 0;
50 char *lang, *devs;
51
52 if ((r = sshpkt_get_cstring(ssh, &lang, NULL)) != 0 ||
53 (r = sshpkt_get_cstring(ssh, &devs, NULL)) != 0 ||
54 (r = sshpkt_get_end(ssh)) != 0)
55 fatal("%s: %s", __func__, ssh_err(r));
56
57 debug("keyboard-interactive devs %s", devs);
58
59 if (options.challenge_response_authentication)
60 authenticated = auth2_challenge(ssh, devs);
61
62 free(devs);
63 free(lang);
64 return authenticated;
65 }
66
67 Authmethod method_kbdint = {
68 "keyboard-interactive",
69 userauth_kbdint,
70 &options.kbd_interactive_authentication
71 };
72