1 /* $OpenBSD: auth-bsdauth.c,v 1.11 2007/09/21 08:15:29 djm 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 <sys/types.h>
27
28 #ifdef BSD_AUTH
29 #include "xmalloc.h"
30 #include "key.h"
31 #include "hostfile.h"
32 #include "auth.h"
33 #include "log.h"
34 #include "buffer.h"
35 #include "monitor_wrap.h"
36
37 __RCSID("$MirOS: src/usr.bin/ssh/auth-bsdauth.c,v 1.5 2008/03/02 21:14:18 tg Exp $");
38
39 static void *
bsdauth_init_ctx(Authctxt * authctxt)40 bsdauth_init_ctx(Authctxt *authctxt)
41 {
42 return authctxt;
43 }
44
45 int
bsdauth_query(void * ctx,char ** name,char ** infotxt,u_int * numprompts,char *** prompts,u_int ** echo_on)46 bsdauth_query(void *ctx, char **name, char **infotxt,
47 u_int *numprompts, char ***prompts, u_int **echo_on)
48 {
49 Authctxt *authctxt = ctx;
50 char *challenge = NULL;
51
52 if (authctxt->as != NULL) {
53 debug2("bsdauth_query: try reuse session");
54 challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE);
55 if (challenge == NULL) {
56 auth_close(authctxt->as);
57 authctxt->as = NULL;
58 }
59 }
60
61 if (challenge == NULL) {
62 debug2("bsdauth_query: new bsd auth session");
63 debug3("bsdauth_query: style %s",
64 authctxt->style ? authctxt->style : "<default>");
65 authctxt->as = auth_userchallenge(authctxt->user,
66 authctxt->style, (char *)"auth-ssh", &challenge);
67 if (authctxt->as == NULL)
68 challenge = NULL;
69 debug2("bsdauth_query: <%s>", challenge ? challenge : "empty");
70 }
71
72 if (challenge == NULL)
73 return -1;
74
75 *name = xstrdup("");
76 *infotxt = xstrdup("");
77 *numprompts = 1;
78 *prompts = xcalloc(*numprompts, sizeof(char *));
79 *echo_on = xcalloc(*numprompts, sizeof(u_int));
80 (*prompts)[0] = xstrdup(challenge);
81
82 return 0;
83 }
84
85 int
bsdauth_respond(void * ctx,u_int numresponses,char ** responses)86 bsdauth_respond(void *ctx, u_int numresponses, char **responses)
87 {
88 Authctxt *authctxt = ctx;
89 int authok;
90
91 if (!authctxt->valid)
92 return -1;
93
94 if (authctxt->as == 0)
95 error("bsdauth_respond: no bsd auth session");
96
97 if (numresponses != 1)
98 return -1;
99
100 authok = auth_userresponse(authctxt->as, responses[0], 0);
101 authctxt->as = NULL;
102 debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok);
103
104 return (authok == 0) ? -1 : 0;
105 }
106
107 static void
bsdauth_free_ctx(void * ctx)108 bsdauth_free_ctx(void *ctx)
109 {
110 Authctxt *authctxt = ctx;
111
112 if (authctxt && authctxt->as) {
113 auth_close(authctxt->as);
114 authctxt->as = NULL;
115 }
116 }
117
118 KbdintDevice bsdauth_device = {
119 "bsdauth",
120 bsdauth_init_ctx,
121 bsdauth_query,
122 bsdauth_respond,
123 bsdauth_free_ctx
124 };
125
126 KbdintDevice mm_bsdauth_device = {
127 "bsdauth",
128 bsdauth_init_ctx,
129 mm_bsdauth_query,
130 mm_bsdauth_respond,
131 bsdauth_free_ctx
132 };
133 #endif
134