2 * Copyright (c) 2001 Markus Friedl. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 RCSID("$OpenBSD: auth-chall.c,v 1.9 2003/11/03 09:03:37 djm Exp $");
32 /* limited protocol v1 interface to kbd-interactive authentication */
34 extern KbdintDevice
*devices
[];
35 static KbdintDevice
*device
;
38 get_challenge(Authctxt
*authctxt
)
40 char *challenge
, *name
, *info
, **prompts
;
44 device
= devices
[0]; /* we always use the 1st device for protocol 1 */
47 if ((authctxt
->kbdintctxt
= device
->init_ctx(authctxt
)) == NULL
)
49 if (device
->query(authctxt
->kbdintctxt
, &name
, &info
,
50 &numprompts
, &prompts
, &echo_on
)) {
51 device
->free_ctx(authctxt
->kbdintctxt
);
52 authctxt
->kbdintctxt
= NULL
;
56 fatal("get_challenge: numprompts < 1");
57 challenge
= xstrdup(prompts
[0]);
58 for (i
= 0; i
< numprompts
; i
++)
68 verify_response(Authctxt
*authctxt
, const char *response
)
70 char *resp
[1], *name
, *info
, **prompts
;
71 u_int i
, numprompts
, *echo_on
;
72 int authenticated
= 0;
76 if (authctxt
->kbdintctxt
== NULL
)
78 resp
[0] = (char *)response
;
79 switch (device
->respond(authctxt
->kbdintctxt
, 1, resp
)) {
83 case 1: /* Postponed - retry with empty query for PAM */
84 if ((device
->query(authctxt
->kbdintctxt
, &name
, &info
,
85 &numprompts
, &prompts
, &echo_on
)) != 0)
87 if (numprompts
== 0 &&
88 device
->respond(authctxt
->kbdintctxt
, 0, resp
) == 0)
91 for (i
= 0; i
< numprompts
; i
++)
99 device
->free_ctx(authctxt
->kbdintctxt
);
100 authctxt
->kbdintctxt
= NULL
;
101 return authenticated
;
104 abandon_challenge_response(Authctxt
*authctxt
)
106 if (authctxt
->kbdintctxt
!= NULL
) {
107 device
->free_ctx(authctxt
->kbdintctxt
);
108 authctxt
->kbdintctxt
= NULL
;