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c7d39ac8 | 1 | /* $OpenBSD: auth-bsdauth.c,v 1.15 2018/07/09 21:35:50 markus Exp $ */ |
d1aed9c0 BL |
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 | */ | |
d7834353 | 25 | |
d1aed9c0 | 26 | #include "includes.h" |
d1aed9c0 | 27 | |
d7834353 | 28 | #include <sys/types.h> |
8668706d DM |
29 | #include <stdarg.h> |
30 | #include <stdio.h> | |
d7834353 | 31 | |
d1aed9c0 BL |
32 | #ifdef BSD_AUTH |
33 | #include "xmalloc.h" | |
c7d39ac8 | 34 | #include "sshkey.h" |
35 | #include "sshbuf.h" | |
d7834353 | 36 | #include "hostfile.h" |
d1aed9c0 BL |
37 | #include "auth.h" |
38 | #include "log.h" | |
d7834353 DM |
39 | #ifdef GSSAPI |
40 | #include "ssh-gss.h" | |
41 | #endif | |
7a2073c5 | 42 | #include "monitor_wrap.h" |
d1aed9c0 BL |
43 | |
44 | static void * | |
45 | bsdauth_init_ctx(Authctxt *authctxt) | |
46 | { | |
47 | return authctxt; | |
48 | } | |
49 | ||
7a2073c5 | 50 | int |
9f0f5c64 | 51 | bsdauth_query(void *ctx, char **name, char **infotxt, |
d1aed9c0 BL |
52 | u_int *numprompts, char ***prompts, u_int **echo_on) |
53 | { | |
9f0f5c64 DM |
54 | Authctxt *authctxt = ctx; |
55 | char *challenge = NULL; | |
56 | ||
8f9cd709 DM |
57 | *infotxt = NULL; |
58 | *numprompts = 0; | |
59 | *prompts = NULL; | |
60 | *echo_on = NULL; | |
61 | ||
9f0f5c64 DM |
62 | if (authctxt->as != NULL) { |
63 | debug2("bsdauth_query: try reuse session"); | |
64 | challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE); | |
65 | if (challenge == NULL) { | |
66 | auth_close(authctxt->as); | |
67 | authctxt->as = NULL; | |
68 | } | |
69 | } | |
70 | ||
71 | if (challenge == NULL) { | |
72 | debug2("bsdauth_query: new bsd auth session"); | |
73 | debug3("bsdauth_query: style %s", | |
d1aed9c0 | 74 | authctxt->style ? authctxt->style : "<default>"); |
9f0f5c64 | 75 | authctxt->as = auth_userchallenge(authctxt->user, |
cb72e4f6 | 76 | authctxt->style, "auth-ssh", &challenge); |
9f0f5c64 DM |
77 | if (authctxt->as == NULL) |
78 | challenge = NULL; | |
79 | debug2("bsdauth_query: <%s>", challenge ? challenge : "empty"); | |
80 | } | |
81 | ||
82 | if (challenge == NULL) | |
83 | return -1; | |
84 | ||
cb72e4f6 BL |
85 | *name = xstrdup(""); |
86 | *infotxt = xstrdup(""); | |
9f0f5c64 | 87 | *numprompts = 1; |
07d86bec DM |
88 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
89 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
9f0f5c64 DM |
90 | (*prompts)[0] = xstrdup(challenge); |
91 | ||
92 | return 0; | |
d1aed9c0 BL |
93 | } |
94 | ||
7a2073c5 | 95 | int |
d1aed9c0 BL |
96 | bsdauth_respond(void *ctx, u_int numresponses, char **responses) |
97 | { | |
9f0f5c64 DM |
98 | Authctxt *authctxt = ctx; |
99 | int authok; | |
100 | ||
611649eb DT |
101 | if (!authctxt->valid) |
102 | return -1; | |
103 | ||
7d6c0362 | 104 | if (authctxt->as == NULL) |
9f0f5c64 | 105 | error("bsdauth_respond: no bsd auth session"); |
d1aed9c0 | 106 | |
9f0f5c64 DM |
107 | if (numresponses != 1) |
108 | return -1; | |
d1aed9c0 | 109 | |
9f0f5c64 DM |
110 | authok = auth_userresponse(authctxt->as, responses[0], 0); |
111 | authctxt->as = NULL; | |
112 | debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok); | |
d1aed9c0 | 113 | |
9f0f5c64 | 114 | return (authok == 0) ? -1 : 0; |
d1aed9c0 BL |
115 | } |
116 | ||
117 | static void | |
118 | bsdauth_free_ctx(void *ctx) | |
119 | { | |
9f0f5c64 | 120 | Authctxt *authctxt = ctx; |
d1aed9c0 | 121 | |
9f0f5c64 DM |
122 | if (authctxt && authctxt->as) { |
123 | auth_close(authctxt->as); | |
124 | authctxt->as = NULL; | |
125 | } | |
d1aed9c0 BL |
126 | } |
127 | ||
128 | KbdintDevice bsdauth_device = { | |
129 | "bsdauth", | |
130 | bsdauth_init_ctx, | |
131 | bsdauth_query, | |
132 | bsdauth_respond, | |
133 | bsdauth_free_ctx | |
134 | }; | |
7a2073c5 BL |
135 | |
136 | KbdintDevice mm_bsdauth_device = { | |
137 | "bsdauth", | |
138 | bsdauth_init_ctx, | |
139 | mm_bsdauth_query, | |
140 | mm_bsdauth_respond, | |
141 | bsdauth_free_ctx | |
142 | }; | |
d1aed9c0 | 143 | #endif |