blob: 0b3262b49fc64e78f6511f7ac5796e4670a3ecc5 [file] [log] [blame]
Damien Miller733124b2007-10-26 14:25:12 +10001/* $OpenBSD: auth-bsdauth.c,v 1.11 2007/09/21 08:15:29 djm Exp $ */
Ben Lindstromd1aed9c2001-06-10 00:41:18 +00002/*
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 */
Damien Millerd7834352006-08-05 12:39:39 +100025
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000026#include "includes.h"
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000027
Damien Millerd7834352006-08-05 12:39:39 +100028#include <sys/types.h>
29
Damien Millerded319c2006-09-01 15:38:36 +100030#include <stdarg.h>
31
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000032#ifdef BSD_AUTH
33#include "xmalloc.h"
Damien Millerd7834352006-08-05 12:39:39 +100034#include "key.h"
35#include "hostfile.h"
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000036#include "auth.h"
37#include "log.h"
Damien Millerd7834352006-08-05 12:39:39 +100038#include "buffer.h"
39#ifdef GSSAPI
40#include "ssh-gss.h"
41#endif
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000042#include "monitor_wrap.h"
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000043
44static void *
45bsdauth_init_ctx(Authctxt *authctxt)
46{
47 return authctxt;
48}
49
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000050int
Damien Miller9f0f5c62001-12-21 14:45:46 +110051bsdauth_query(void *ctx, char **name, char **infotxt,
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000052 u_int *numprompts, char ***prompts, u_int **echo_on)
53{
Damien Miller9f0f5c62001-12-21 14:45:46 +110054 Authctxt *authctxt = ctx;
55 char *challenge = NULL;
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000056
Damien Miller9f0f5c62001-12-21 14:45:46 +110057 if (authctxt->as != NULL) {
58 debug2("bsdauth_query: try reuse session");
59 challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE);
60 if (challenge == NULL) {
61 auth_close(authctxt->as);
62 authctxt->as = NULL;
63 }
64 }
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000065
Damien Miller9f0f5c62001-12-21 14:45:46 +110066 if (challenge == NULL) {
67 debug2("bsdauth_query: new bsd auth session");
68 debug3("bsdauth_query: style %s",
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000069 authctxt->style ? authctxt->style : "<default>");
Damien Miller9f0f5c62001-12-21 14:45:46 +110070 authctxt->as = auth_userchallenge(authctxt->user,
Ben Lindstromcb72e4f2002-06-21 00:41:51 +000071 authctxt->style, "auth-ssh", &challenge);
Damien Miller9f0f5c62001-12-21 14:45:46 +110072 if (authctxt->as == NULL)
73 challenge = NULL;
74 debug2("bsdauth_query: <%s>", challenge ? challenge : "empty");
75 }
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000076
Damien Miller9f0f5c62001-12-21 14:45:46 +110077 if (challenge == NULL)
78 return -1;
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000079
Ben Lindstromcb72e4f2002-06-21 00:41:51 +000080 *name = xstrdup("");
81 *infotxt = xstrdup("");
Damien Miller9f0f5c62001-12-21 14:45:46 +110082 *numprompts = 1;
Damien Miller07d86be2006-03-26 14:19:21 +110083 *prompts = xcalloc(*numprompts, sizeof(char *));
84 *echo_on = xcalloc(*numprompts, sizeof(u_int));
Damien Miller9f0f5c62001-12-21 14:45:46 +110085 (*prompts)[0] = xstrdup(challenge);
86
87 return 0;
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000088}
89
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000090int
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000091bsdauth_respond(void *ctx, u_int numresponses, char **responses)
92{
Damien Miller9f0f5c62001-12-21 14:45:46 +110093 Authctxt *authctxt = ctx;
94 int authok;
Ben Lindstromd1aed9c2001-06-10 00:41:18 +000095
Darren Tucker611649e2005-01-20 11:05:34 +110096 if (!authctxt->valid)
97 return -1;
98
Damien Miller9f0f5c62001-12-21 14:45:46 +110099 if (authctxt->as == 0)
100 error("bsdauth_respond: no bsd auth session");
Ben Lindstromd1aed9c2001-06-10 00:41:18 +0000101
Damien Miller9f0f5c62001-12-21 14:45:46 +1100102 if (numresponses != 1)
103 return -1;
Ben Lindstromd1aed9c2001-06-10 00:41:18 +0000104
Damien Miller9f0f5c62001-12-21 14:45:46 +1100105 authok = auth_userresponse(authctxt->as, responses[0], 0);
106 authctxt->as = NULL;
107 debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok);
108
109 return (authok == 0) ? -1 : 0;
Ben Lindstromd1aed9c2001-06-10 00:41:18 +0000110}
111
112static void
113bsdauth_free_ctx(void *ctx)
114{
Damien Miller9f0f5c62001-12-21 14:45:46 +1100115 Authctxt *authctxt = ctx;
Ben Lindstromd1aed9c2001-06-10 00:41:18 +0000116
Damien Miller9f0f5c62001-12-21 14:45:46 +1100117 if (authctxt && authctxt->as) {
118 auth_close(authctxt->as);
119 authctxt->as = NULL;
120 }
Ben Lindstromd1aed9c2001-06-10 00:41:18 +0000121}
122
123KbdintDevice bsdauth_device = {
124 "bsdauth",
125 bsdauth_init_ctx,
126 bsdauth_query,
127 bsdauth_respond,
128 bsdauth_free_ctx
129};
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000130
131KbdintDevice mm_bsdauth_device = {
132 "bsdauth",
133 bsdauth_init_ctx,
134 mm_bsdauth_query,
135 mm_bsdauth_respond,
136 bsdauth_free_ctx
137};
Ben Lindstromd1aed9c2001-06-10 00:41:18 +0000138#endif