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31652869 | 1 | /* $OpenBSD: auth-bsdauth.c,v 1.10 2006/08/03 03:34:41 deraadt Exp $ */ |
bf093080 | 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 | */ | |
31652869 | 25 | |
bf093080 | 26 | #include "includes.h" |
bf093080 | 27 | |
31652869 | 28 | #include <sys/types.h> |
29 | ||
bf093080 | 30 | #ifdef BSD_AUTH |
31 | #include "xmalloc.h" | |
31652869 | 32 | #include "key.h" |
33 | #include "hostfile.h" | |
bf093080 | 34 | #include "auth.h" |
35 | #include "log.h" | |
31652869 | 36 | #include "buffer.h" |
37 | #ifdef GSSAPI | |
38 | #include "ssh-gss.h" | |
39 | #endif | |
1853d1ef | 40 | #include "monitor_wrap.h" |
bf093080 | 41 | |
42 | static void * | |
43 | bsdauth_init_ctx(Authctxt *authctxt) | |
44 | { | |
45 | return authctxt; | |
46 | } | |
47 | ||
1853d1ef | 48 | int |
184eed6a | 49 | bsdauth_query(void *ctx, char **name, char **infotxt, |
bf093080 | 50 | u_int *numprompts, char ***prompts, u_int **echo_on) |
51 | { | |
184eed6a | 52 | Authctxt *authctxt = ctx; |
53 | char *challenge = NULL; | |
54 | ||
55 | if (authctxt->as != NULL) { | |
56 | debug2("bsdauth_query: try reuse session"); | |
57 | challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE); | |
58 | if (challenge == NULL) { | |
59 | auth_close(authctxt->as); | |
60 | authctxt->as = NULL; | |
61 | } | |
62 | } | |
63 | ||
64 | if (challenge == NULL) { | |
65 | debug2("bsdauth_query: new bsd auth session"); | |
66 | debug3("bsdauth_query: style %s", | |
bf093080 | 67 | authctxt->style ? authctxt->style : "<default>"); |
184eed6a | 68 | authctxt->as = auth_userchallenge(authctxt->user, |
7203d6bb | 69 | authctxt->style, "auth-ssh", &challenge); |
184eed6a | 70 | if (authctxt->as == NULL) |
71 | challenge = NULL; | |
72 | debug2("bsdauth_query: <%s>", challenge ? challenge : "empty"); | |
73 | } | |
74 | ||
75 | if (challenge == NULL) | |
76 | return -1; | |
77 | ||
7203d6bb | 78 | *name = xstrdup(""); |
79 | *infotxt = xstrdup(""); | |
184eed6a | 80 | *numprompts = 1; |
52e3daed | 81 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
82 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
184eed6a | 83 | (*prompts)[0] = xstrdup(challenge); |
84 | ||
85 | return 0; | |
bf093080 | 86 | } |
87 | ||
1853d1ef | 88 | int |
bf093080 | 89 | bsdauth_respond(void *ctx, u_int numresponses, char **responses) |
90 | { | |
184eed6a | 91 | Authctxt *authctxt = ctx; |
92 | int authok; | |
93 | ||
37ea4f91 | 94 | if (!authctxt->valid) |
95 | return -1; | |
96 | ||
184eed6a | 97 | if (authctxt->as == 0) |
98 | error("bsdauth_respond: no bsd auth session"); | |
bf093080 | 99 | |
184eed6a | 100 | if (numresponses != 1) |
101 | return -1; | |
bf093080 | 102 | |
184eed6a | 103 | authok = auth_userresponse(authctxt->as, responses[0], 0); |
104 | authctxt->as = NULL; | |
105 | debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok); | |
bf093080 | 106 | |
184eed6a | 107 | return (authok == 0) ? -1 : 0; |
bf093080 | 108 | } |
109 | ||
110 | static void | |
111 | bsdauth_free_ctx(void *ctx) | |
112 | { | |
184eed6a | 113 | Authctxt *authctxt = ctx; |
bf093080 | 114 | |
184eed6a | 115 | if (authctxt && authctxt->as) { |
116 | auth_close(authctxt->as); | |
117 | authctxt->as = NULL; | |
118 | } | |
bf093080 | 119 | } |
120 | ||
121 | KbdintDevice bsdauth_device = { | |
122 | "bsdauth", | |
123 | bsdauth_init_ctx, | |
124 | bsdauth_query, | |
125 | bsdauth_respond, | |
126 | bsdauth_free_ctx | |
127 | }; | |
1853d1ef | 128 | |
129 | KbdintDevice mm_bsdauth_device = { | |
130 | "bsdauth", | |
131 | bsdauth_init_ctx, | |
132 | mm_bsdauth_query, | |
133 | mm_bsdauth_respond, | |
134 | bsdauth_free_ctx | |
135 | }; | |
bf093080 | 136 | #endif |