1/* $OpenBSD: auth-skey.c,v 1.27 2007/01/21 01:41:54 stevesk Exp $ */
2/*
3 * Copyright (c) 2001 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#ifdef SKEY
29
30#include <sys/types.h>
31
32#include <pwd.h>
33#include <stdio.h>
34
35#include <skey.h>
36
37#include "xmalloc.h"
38#include "key.h"
39#include "hostfile.h"
40#include "auth.h"
41#include "ssh-gss.h"
42#include "log.h"
43#include "monitor_wrap.h"
44
45static void *
46skey_init_ctx(Authctxt *authctxt)
47{
48	return authctxt;
49}
50
51int
52skey_query(void *ctx, char **name, char **infotxt,
53    u_int* numprompts, char ***prompts, u_int **echo_on)
54{
55	Authctxt *authctxt = ctx;
56	char challenge[1024];
57	struct skey skey;
58
59	if (_compat_skeychallenge(&skey, authctxt->user, challenge,
60	    sizeof(challenge)) == -1)
61		return -1;
62
63	*name = xstrdup("");
64	*infotxt = xstrdup("");
65	*numprompts = 1;
66	*prompts = xcalloc(*numprompts, sizeof(char *));
67	*echo_on = xcalloc(*numprompts, sizeof(u_int));
68
69	xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
70
71	return 0;
72}
73
74int
75skey_respond(void *ctx, u_int numresponses, char **responses)
76{
77	Authctxt *authctxt = ctx;
78
79	if (authctxt->valid &&
80	    numresponses == 1 &&
81	    skey_haskey(authctxt->pw->pw_name) == 0 &&
82	    skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
83	    return 0;
84	return -1;
85}
86
87static void
88skey_free_ctx(void *ctx)
89{
90	/* we don't have a special context */
91}
92
93KbdintDevice skey_device = {
94	"skey",
95	skey_init_ctx,
96	skey_query,
97	skey_respond,
98	skey_free_ctx
99};
100
101KbdintDevice mm_skey_device = {
102	"skey",
103	skey_init_ctx,
104	mm_skey_query,
105	mm_skey_respond,
106	skey_free_ctx
107};
108#endif /* SKEY */
109