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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2022 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include "portable.h"
#include <stdio.h>
#include <lber.h>
#include <lber_pvt.h> /* BER_BVC definition */
#include "lutil.h"
#include <ldap_pvt_thread.h>
#include <ac/string.h>
#include <ac/unistd.h>
#include <radlib.h>
extern char *global_host; /* from slapd */
static LUTIL_PASSWD_CHK_FUNC chk_radius;
static const struct berval scheme = BER_BVC("{RADIUS}");
static char *config_filename;
static ldap_pvt_thread_mutex_t libradius_mutex;
static int
chk_radius(
const struct berval *sc,
const struct berval *passwd,
const struct berval *cred,
const char **text )
{
unsigned int i;
int rc = LUTIL_PASSWD_ERR;
struct rad_handle *h = NULL;
for ( i = 0; i < cred->bv_len; i++ ) {
if ( cred->bv_val[ i ] == '\0' ) {
return LUTIL_PASSWD_ERR; /* NUL character in cred */
}
}
if ( cred->bv_val[ i ] != '\0' ) {
return LUTIL_PASSWD_ERR; /* cred must behave like a string */
}
for ( i = 0; i < passwd->bv_len; i++ ) {
if ( passwd->bv_val[ i ] == '\0' ) {
return LUTIL_PASSWD_ERR; /* NUL character in password */
}
}
if ( passwd->bv_val[ i ] != '\0' ) {
return LUTIL_PASSWD_ERR; /* passwd must behave like a string */
}
ldap_pvt_thread_mutex_lock( &libradius_mutex );
h = rad_auth_open();
if ( h == NULL ) {
ldap_pvt_thread_mutex_unlock( &libradius_mutex );
return LUTIL_PASSWD_ERR;
}
if ( rad_config( h, config_filename ) != 0 ) {
goto done;
}
if ( rad_create_request( h, RAD_ACCESS_REQUEST ) ) {
goto done;
}
if ( rad_put_string( h, RAD_USER_NAME, passwd->bv_val ) != 0 ) {
goto done;
}
if ( rad_put_string( h, RAD_USER_PASSWORD, cred->bv_val ) != 0 ) {
goto done;
}
if ( rad_put_string( h, RAD_NAS_IDENTIFIER, global_host ) != 0 ) {
goto done;
}
switch ( rad_send_request( h ) ) {
case RAD_ACCESS_ACCEPT:
rc = LUTIL_PASSWD_OK;
break;
case RAD_ACCESS_REJECT:
rc = LUTIL_PASSWD_ERR;
break;
case RAD_ACCESS_CHALLENGE:
rc = LUTIL_PASSWD_ERR;
break;
case -1:
/* no valid response is received */
break;
}
done:;
rad_close( h );
ldap_pvt_thread_mutex_unlock( &libradius_mutex );
return rc;
}
int
term_module()
{
return ldap_pvt_thread_mutex_destroy( &libradius_mutex );
}
int
init_module( int argc, char *argv[] )
{
int i;
for ( i = 0; i < argc; i++ ) {
if ( strncasecmp( argv[ i ], "config=", STRLENOF( "config=" ) ) == 0 ) {
/* FIXME: what if multiple loads of same module?
* does it make sense (e.g. override an existing one)? */
if ( config_filename == NULL ) {
config_filename = ber_strdup( &argv[ i ][ STRLENOF( "config=" ) ] );
}
} else {
fprintf( stderr, "init_module(radius): unknown arg#%d=\"%s\".\n",
i, argv[ i ] );
return 1;
}
}
ldap_pvt_thread_mutex_init( &libradius_mutex );
return lutil_passwd_add( (struct berval *)&scheme, chk_radius, NULL );
}
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