1/* $OpenBSD: auth2-kbdint.c,v 1.14 2021/12/19 22:12:07 djm 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 */
44extern ServerOptions options;
45
46static int
47userauth_kbdint(struct ssh *ssh, const char *method)
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_fr(r, "parse packet");
56
57	debug("keyboard-interactive devs %s", devs);
58
59	if (options.kbd_interactive_authentication)
60		authenticated = auth2_challenge(ssh, devs);
61
62	free(devs);
63	free(lang);
64	return authenticated;
65}
66
67Authmethod method_kbdint = {
68	"keyboard-interactive",
69	NULL,
70	userauth_kbdint,
71	&options.kbd_interactive_authentication
72};
73