auth-skey.c revision 99046 
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#include "includes.h"
25RCSID("$OpenBSD: auth-skey.c,v 1.19 2002/06/19 00:27:55 deraadt Exp $");
26RCSID("$FreeBSD: head/crypto/openssh/auth-skey.c 99046 2002-06-29 10:44:37Z des $");
27
28#ifdef SKEY
29
30#ifdef OPIE
31#include <opie.h>
32#define skey			opie
33#define skeychallenge(k, u, c)	opiechallenge((k), (u), (c))
34#define skey_haskey(u)		opie_haskey((u))
35#define skey_passcheck(u, r)	opie_passverify((u), (r))
36#else
37#include <skey.h>
38#endif
39
40#include "xmalloc.h"
41#include "auth.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], *p;
56	int len;
57	struct skey skey;
58
59	if (skeychallenge(&skey, authctxt->user, challenge) == -1)
60		return -1;
61
62	*name  = xstrdup("");
63	*infotxt  = xstrdup("");
64	*numprompts = 1;
65	*prompts = xmalloc(*numprompts * sizeof(char*));
66	*echo_on = xmalloc(*numprompts * sizeof(u_int));
67	(*echo_on)[0] = 0;
68
69	len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
70	p = xmalloc(len);
71	strlcpy(p, challenge, len);
72	strlcat(p, SKEY_PROMPT, len);
73	(*prompts)[0] = p;
74
75	return 0;
76}
77
78int
79skey_respond(void *ctx, u_int numresponses, char **responses)
80{
81	Authctxt *authctxt = ctx;
82
83	if (authctxt->valid &&
84	    numresponses == 1 &&
85	    skey_haskey(authctxt->pw->pw_name) == 0 &&
86	    skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
87	    return 0;
88	return -1;
89}
90
91static void
92skey_free_ctx(void *ctx)
93{
94	/* we don't have a special context */
95}
96
97KbdintDevice skey_device = {
98	"skey",
99	skey_init_ctx,
100	skey_query,
101	skey_respond,
102	skey_free_ctx
103};
104
105KbdintDevice mm_skey_device = {
106	"skey",
107	skey_init_ctx,
108	mm_skey_query,
109	mm_skey_respond,
110	skey_free_ctx
111};
112#endif /* SKEY */
113