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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 "monitor_wrap.h" | |
43 | ||
44 | static void * | |
45 | skey_init_ctx(Authctxt *authctxt) | |
46 | { | |
47 | return authctxt; | |
48 | } | |
49 | ||
50 | int | |
51 | skey_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 | ||
73 | int | |
74 | skey_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 | ||
86 | static void | |
87 | skey_free_ctx(void *ctx) | |
88 | { | |
89 | /* we don't have a special context */ | |
90 | } | |
91 | ||
92 | KbdintDevice skey_device = { | |
93 | "skey", | |
94 | skey_init_ctx, | |
95 | skey_query, | |
96 | skey_respond, | |
97 | skey_free_ctx | |
98 | }; | |
99 | ||
100 | KbdintDevice 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 */ |