auth-skey.c revision 181110 
1/* $OpenBSD: auth-skey.c,v 1.26 2006/08/05 08:28:24 dtucker 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 "monitor_wrap.h"
43
44static void *
45skey_init_ctx(Authctxt *authctxt)
46{
47	return authctxt;
48}
49
50int
51skey_query(void *ctx, char **name, char **infotxt,
52    u_int* numprompts, char ***prompts, u_int **echo_on)
53{
54	Authctxt *authctxt = ctx;
55	char challenge[1024];
56	struct skey skey;
57
58	if (_compat_skeychallenge(&skey, authctxt->user, challenge,
59	    sizeof(challenge)) == -1)
60		return -1;
61
62	*name  = xstrdup("");
63	*infotxt  = xstrdup("");
64	*numprompts = 1;
65	*prompts = xcalloc(*numprompts, sizeof(char *));
66	*echo_on = xcalloc(*numprompts, sizeof(u_int));
67
68	xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
69
70	return 0;
71}
72
73int
74skey_respond(void *ctx, u_int numresponses, char **responses)
75{
76	Authctxt *authctxt = ctx;
77
78	if (authctxt->valid &&
79	    numresponses == 1 &&
80	    skey_haskey(authctxt->pw->pw_name) == 0 &&
81	    skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
82	    return 0;
83	return -1;
84}
85
86static void
87skey_free_ctx(void *ctx)
88{
89	/* we don't have a special context */
90}
91
92KbdintDevice skey_device = {
93	"skey",
94	skey_init_ctx,
95	skey_query,
96	skey_respond,
97	skey_free_ctx
98};
99
100KbdintDevice mm_skey_device = {
101	"skey",
102	skey_init_ctx,
103	mm_skey_query,
104	mm_skey_respond,
105	skey_free_ctx
106};
107#endif /* SKEY */
108