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auth-chall.c (92559) auth-chall.c (98941)
1/*
2 * Copyright (c) 2001 Markus Friedl. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
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.
12 *
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.
23 */
24
25#include "includes.h"
26RCSID("$OpenBSD: auth-chall.c,v 1.8 2001/05/18 14:13:28 markus Exp $");
1/*
2 * Copyright (c) 2001 Markus Friedl. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include "includes.h"
26RCSID("$OpenBSD: auth-chall.c,v 1.8 2001/05/18 14:13:28 markus Exp $");
27RCSID("$FreeBSD: head/crypto/openssh/auth-chall.c 92559 2002-03-18 10:09:43Z des $");
28
29#include "auth.h"
30#include "log.h"
31#include "xmalloc.h"
32
33/* limited protocol v1 interface to kbd-interactive authentication */
34
35extern KbdintDevice *devices[];
36static KbdintDevice *device;
37
38char *
39get_challenge(Authctxt *authctxt)
40{
41 char *challenge, *name, *info, **prompts;
42 u_int i, numprompts;
43 u_int *echo_on;
44
45 device = devices[0]; /* we always use the 1st device for protocol 1 */
46 if (device == NULL)
47 return NULL;
48 if ((authctxt->kbdintctxt = device->init_ctx(authctxt)) == NULL)
49 return NULL;
50 if (device->query(authctxt->kbdintctxt, &name, &info,
51 &numprompts, &prompts, &echo_on)) {
52 device->free_ctx(authctxt->kbdintctxt);
53 authctxt->kbdintctxt = NULL;
54 return NULL;
55 }
56 if (numprompts < 1)
57 fatal("get_challenge: numprompts < 1");
58 challenge = xstrdup(prompts[0]);
59 for (i = 0; i < numprompts; i++)
60 xfree(prompts[i]);
61 xfree(prompts);
62 xfree(name);
63 xfree(echo_on);
64 xfree(info);
65
66 return (challenge);
67}
68int
69verify_response(Authctxt *authctxt, const char *response)
70{
71 char *resp[1];
72 int res;
73
74 if (device == NULL)
75 return 0;
76 if (authctxt->kbdintctxt == NULL)
77 return 0;
78 resp[0] = (char *)response;
79 res = device->respond(authctxt->kbdintctxt, 1, resp);
80 device->free_ctx(authctxt->kbdintctxt);
81 authctxt->kbdintctxt = NULL;
82 return res ? 0 : 1;
83}
27
28#include "auth.h"
29#include "log.h"
30#include "xmalloc.h"
31
32/* limited protocol v1 interface to kbd-interactive authentication */
33
34extern KbdintDevice *devices[];
35static KbdintDevice *device;
36
37char *
38get_challenge(Authctxt *authctxt)
39{
40 char *challenge, *name, *info, **prompts;
41 u_int i, numprompts;
42 u_int *echo_on;
43
44 device = devices[0]; /* we always use the 1st device for protocol 1 */
45 if (device == NULL)
46 return NULL;
47 if ((authctxt->kbdintctxt = device->init_ctx(authctxt)) == NULL)
48 return NULL;
49 if (device->query(authctxt->kbdintctxt, &name, &info,
50 &numprompts, &prompts, &echo_on)) {
51 device->free_ctx(authctxt->kbdintctxt);
52 authctxt->kbdintctxt = NULL;
53 return NULL;
54 }
55 if (numprompts < 1)
56 fatal("get_challenge: numprompts < 1");
57 challenge = xstrdup(prompts[0]);
58 for (i = 0; i < numprompts; i++)
59 xfree(prompts[i]);
60 xfree(prompts);
61 xfree(name);
62 xfree(echo_on);
63 xfree(info);
64
65 return (challenge);
66}
67int
68verify_response(Authctxt *authctxt, const char *response)
69{
70 char *resp[1];
71 int res;
72
73 if (device == NULL)
74 return 0;
75 if (authctxt->kbdintctxt == NULL)
76 return 0;
77 resp[0] = (char *)response;
78 res = device->respond(authctxt->kbdintctxt, 1, resp);
79 device->free_ctx(authctxt->kbdintctxt);
80 authctxt->kbdintctxt = NULL;
81 return res ? 0 : 1;
82}