radius.c revision 1.1.1.3 
1/*	$NetBSD: radius.c,v 1.1.1.3 2010/12/12 15:19:13 adam Exp $	*/
2
3/* OpenLDAP: pkg/ldap/contrib/slapd-modules/passwd/radius.c,v 1.2.2.7 2010/04/13 20:22:29 kurt Exp */
4/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 *
6 * Copyright 1998-2010 The OpenLDAP Foundation.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
11 * Public License.
12 *
13 * A copy of this license is available in the file LICENSE in the
14 * top-level directory of the distribution or, alternatively, at
15 * <http://www.OpenLDAP.org/license.html>.
16 */
17
18#include "portable.h"
19
20#include <stdio.h>
21
22#include <lber.h>
23#include <lber_pvt.h>	/* BER_BVC definition */
24#include "lutil.h"
25#include <ldap_pvt_thread.h>
26#include <ac/string.h>
27#include <ac/unistd.h>
28
29#include <radlib.h>
30
31static LUTIL_PASSWD_CHK_FUNC chk_radius;
32static const struct berval scheme = BER_BVC("{RADIUS}");
33static char *config_filename;
34static ldap_pvt_thread_mutex_t libradius_mutex;
35
36static int
37chk_radius(
38	const struct berval	*sc,
39	const struct berval	*passwd,
40	const struct berval	*cred,
41	const char		**text )
42{
43	unsigned int		i;
44	int			rc = LUTIL_PASSWD_ERR;
45
46	struct rad_handle	*h = NULL;
47
48	for ( i = 0; i < cred->bv_len; i++ ) {
49		if ( cred->bv_val[ i ] == '\0' ) {
50			return LUTIL_PASSWD_ERR;	/* NUL character in cred */
51		}
52	}
53
54	if ( cred->bv_val[ i ] != '\0' ) {
55		return LUTIL_PASSWD_ERR;	/* cred must behave like a string */
56	}
57
58	for ( i = 0; i < passwd->bv_len; i++ ) {
59		if ( passwd->bv_val[ i ] == '\0' ) {
60			return LUTIL_PASSWD_ERR;	/* NUL character in password */
61		}
62	}
63
64	if ( passwd->bv_val[ i ] != '\0' ) {
65		return LUTIL_PASSWD_ERR;	/* passwd must behave like a string */
66	}
67
68	ldap_pvt_thread_mutex_lock( &libradius_mutex );
69
70	h = rad_auth_open();
71	if ( h == NULL ) {
72		ldap_pvt_thread_mutex_unlock( &libradius_mutex );
73		return LUTIL_PASSWD_ERR;
74	}
75
76	if ( rad_config( h, config_filename ) != 0 ) {
77		goto done;
78	}
79
80	if ( rad_create_request( h, RAD_ACCESS_REQUEST ) ) {
81		goto done;
82	}
83
84	if ( rad_put_string( h, RAD_USER_NAME, passwd->bv_val ) != 0 ) {
85		goto done;
86	}
87
88	if ( rad_put_string( h, RAD_USER_PASSWORD, cred->bv_val ) != 0 ) {
89		goto done;
90	}
91
92	switch ( rad_send_request( h ) ) {
93	case RAD_ACCESS_ACCEPT:
94		rc = LUTIL_PASSWD_OK;
95		break;
96
97	case RAD_ACCESS_REJECT:
98		rc = LUTIL_PASSWD_ERR;
99		break;
100
101	case RAD_ACCESS_CHALLENGE:
102		rc = LUTIL_PASSWD_ERR;
103		break;
104
105	case -1:
106		/* no valid response is received */
107		break;
108	}
109
110done:;
111	rad_close( h );
112
113	ldap_pvt_thread_mutex_unlock( &libradius_mutex );
114	return rc;
115}
116
117int
118term_module()
119{
120	return ldap_pvt_thread_mutex_destroy( &libradius_mutex );
121}
122
123int
124init_module( int argc, char *argv[] )
125{
126	int	i;
127
128	for ( i = 0; i < argc; i++ ) {
129		if ( strncasecmp( argv[ i ], "config=", STRLENOF( "config=" ) ) == 0 ) {
130			/* FIXME: what if multiple loads of same module?
131			 * does it make sense (e.g. override an existing one)? */
132			if ( config_filename == NULL ) {
133				config_filename = ber_strdup( &argv[ i ][ STRLENOF( "config=" ) ] );
134			}
135
136		} else {
137			fprintf( stderr, "init_module(radius): unknown arg#%d=\"%s\".\n",
138				i, argv[ i ] );
139			return 1;
140		}
141	}
142
143	ldap_pvt_thread_mutex_init( &libradius_mutex );
144
145	return lutil_passwd_add( (struct berval *)&scheme, chk_radius, NULL );
146}
147