/* backend.c - routines for dealing with back-end databases */
/* $OpenLDAP: pkg/ldap/servers/slapd/backend.c,v 1.288.2.25 2007/01/02 21:43:54 kurt Exp $ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2007 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>.
*/
/* Portions Copyright (c) 1995 Regents of the University of Michigan.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of Michigan at Ann Arbor. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include <sys/stat.h>
#include "slap.h"
#include "lutil.h"
#include "lber_pvt.h"
/*
* If a module is configured as dynamic, its header should not
* get included into slapd. While this is a general rule and does
* not have much of an effect in UNIX, this rule should be adhered
* to for Windows, where dynamic object code should not be implicitly
* imported into slapd without appropriate __declspec(dllimport) directives.
*/
int nBackendInfo = 0;
slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
int nBackendDB = 0;
slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
static int
backend_init_controls( BackendInfo *bi )
{
if ( bi->bi_controls ) {
int i;
for ( i = 0; bi->bi_controls[ i ]; i++ ) {
int cid;
if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
== LDAP_CONTROL_NOT_FOUND )
{
if ( !( slapMode & SLAP_TOOL_MODE ) ) {
assert( 0 );
}
return -1;
}
bi->bi_ctrls[ cid ] = 1;
}
}
return 0;
}
int backend_init(void)
{
int rc = -1;
BackendInfo *bi;
if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
/* already initialized */
Debug( LDAP_DEBUG_ANY,
"backend_init: already initialized\n", 0, 0, 0 );
return -1;
}
for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
assert( bi->bi_init != 0 );
rc = bi->bi_init( bi );
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_init: initialized for type \"%s\"\n",
bi->bi_type, 0, 0 );
/* destroy those we've already inited */
for( nBackendInfo--;
nBackendInfo >= 0 ;
nBackendInfo-- )
{
if ( slap_binfo[nBackendInfo].bi_destroy ) {
slap_binfo[nBackendInfo].bi_destroy(
&slap_binfo[nBackendInfo] );
}
}
return rc;
}
LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
}
if ( nBackendInfo > 0) {
return 0;
}
#ifdef SLAPD_MODULES
return 0;
#else
Debug( LDAP_DEBUG_ANY,
"backend_init: failed\n",
0, 0, 0 );
return rc;
#endif /* SLAPD_MODULES */
}
int backend_add(BackendInfo *aBackendInfo)
{
int rc = 0;
if ( aBackendInfo->bi_init == NULL ) {
Debug( LDAP_DEBUG_ANY, "backend_add: "
"backend type \"%s\" does not have the (mandatory)init function\n",
aBackendInfo->bi_type, 0, 0 );
return -1;
}
rc = aBackendInfo->bi_init(aBackendInfo);
if ( rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_add: initialization for type \"%s\" failed\n",
aBackendInfo->bi_type, 0, 0 );
return rc;
}
(void)backend_init_controls( aBackendInfo );
/* now add the backend type to the Backend Info List */
LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
nBackendInfo++;
return 0;
}
static int
backend_set_controls( BackendDB *be )
{
BackendInfo *bi = be->bd_info;
/* back-relay takes care of itself; so may do other */
if ( overlay_is_over( be ) ) {
bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
}
if ( bi->bi_controls ) {
if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
sizeof( be->be_ctrls ) );
be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
} else {
int i;
for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
if ( bi->bi_ctrls[ i ] ) {
be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
}
}
}
}
return 0;
}
/* startup a specific backend database */
int backend_startup_one(Backend *be)
{
int rc = 0;
assert( be != NULL );
be->be_pending_csn_list = (struct be_pcl *)
ch_calloc( 1, sizeof( struct be_pcl ) );
LDAP_TAILQ_INIT( be->be_pending_csn_list );
Debug( LDAP_DEBUG_TRACE,
"backend_startup_one: starting \"%s\"\n",
be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
0, 0 );
/* set database controls */
(void)backend_set_controls( be );
if ( be->bd_info->bi_db_open ) {
rc = be->bd_info->bi_db_open( be );
if ( rc == 0 ) {
(void)backend_set_controls( be );
} else {
Debug( LDAP_DEBUG_ANY,
"backend_startup_one: bi_db_open failed! (%d)\n",
rc, 0, 0 );
}
}
return rc;
}
int backend_startup(Backend *be)
{
int i;
int rc = 0;
BackendInfo *bi;
if( ! ( nBackendDB > 0 ) ) {
/* no databases */
Debug( LDAP_DEBUG_ANY,
"backend_startup: %d databases to startup.\n",
nBackendDB, 0, 0 );
return 1;
}
if(be != NULL) {
if ( be->bd_info->bi_open ) {
rc = be->bd_info->bi_open( be->bd_info );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_open failed!\n",
0, 0, 0 );
return rc;
}
}
/* append global access controls */
acl_append( &be->be_acl, frontendDB->be_acl, -1 );
return backend_startup_one( be );
}
/* open frontend, if required */
if ( frontendDB->bd_info->bi_db_open ) {
rc = frontendDB->bd_info->bi_db_open( frontendDB );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_db_open(frontend) failed! (%d)\n",
rc, 0, 0 );
return rc;
}
}
/* open each backend type */
i = -1;
LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
i++;
if( bi->bi_nDB == 0) {
/* no database of this type, don't open */
continue;
}
if( bi->bi_open ) {
rc = bi->bi_open( bi );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_open %d (%s) failed!\n",
i, bi->bi_type, 0 );
return rc;
}
}
(void)backend_init_controls( bi );
}
/* open each backend database */
i = -1;
LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
i++;
if ( be->be_suffix == NULL ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: warning, database %d (%s) "
"has no suffix\n",
i, be->bd_info->bi_type, 0 );
}
/* append global access controls */
acl_append( &be->be_acl, frontendDB->be_acl, -1 );
rc = backend_startup_one( be );
if ( rc ) return rc;
}
return rc;
}
int backend_num( Backend *be )
{
int i = 0;
BackendDB *b2;
if( be == NULL ) return -1;
LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
if( be == b2 ) return i;
i++;
}
return -1;
}
int backend_shutdown( Backend *be )
{
int rc = 0;
BackendInfo *bi;
if( be != NULL ) {
/* shutdown a specific backend database */
if ( be->bd_info->bi_nDB == 0 ) {
/* no database of this type, we never opened it */
return 0;
}
if ( be->bd_info->bi_db_close ) {
be->bd_info->bi_db_close( be );
}
if( be->bd_info->bi_close ) {
be->bd_info->bi_close( be->bd_info );
}
return 0;
}
/* close each backend database */
LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
if ( be->bd_info->bi_db_close ) {
be->bd_info->bi_db_close( be );
}
if(rc != 0) {
Debug( LDAP_DEBUG_ANY,
"backend_close: bi_db_close %s failed!\n",
be->be_type, 0, 0 );
}
}
/* close each backend type */
LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
if( bi->bi_nDB == 0 ) {
/* no database of this type */
continue;
}
if( bi->bi_close ) {
bi->bi_close( bi );
}
}
/* close frontend, if required */
if ( frontendDB->bd_info->bi_db_close ) {
rc = frontendDB->bd_info->bi_db_close ( frontendDB );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"backend_startup: bi_db_close(frontend) failed! (%d)\n",
rc, 0, 0 );
}
}
return 0;
}
void backend_destroy_one( BackendDB *bd, int dynamic )
{
if ( dynamic ) {
LDAP_STAILQ_REMOVE(&backendDB, bd, slap_backend_db, be_next );
}
if ( bd->be_syncinfo ) {
syncinfo_free( bd->be_syncinfo );
}
if ( bd->be_pending_csn_list ) {
struct slap_csn_entry *csne;
csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
while ( csne ) {
struct slap_csn_entry *tmp_csne = csne;
LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
ch_free( csne->ce_csn.bv_val );
csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
ch_free( tmp_csne );
}
ch_free( bd->be_pending_csn_list );
}
if ( bd->bd_info->bi_db_destroy ) {
bd->bd_info->bi_db_destroy( bd );
}
ber_bvarray_free( bd->be_suffix );
ber_bvarray_free( bd->be_nsuffix );
if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
free( bd->be_rootdn.bv_val );
}
if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
free( bd->be_rootndn.bv_val );
}
if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
free( bd->be_rootpw.bv_val );
}
acl_destroy( bd->be_acl, frontendDB->be_acl );
limits_destroy( bd->be_limits );
if ( bd->be_replogfile ) {
ch_free( bd->be_replogfile );
}
destroy_replica_info( bd );
if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
ch_free( bd->be_update_ndn.bv_val );
}
if ( bd->be_update_refs ) {
ber_bvarray_free( bd->be_update_refs );
}
if ( dynamic ) {
free( bd );
}
}
int backend_destroy(void)
{
BackendDB *bd;
BackendInfo *bi;
/* destroy each backend database */
while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
backend_destroy_one( bd, 1 );
}
/* destroy each backend type */
LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
if( bi->bi_destroy ) {
bi->bi_destroy( bi );
}
}
nBackendInfo = 0;
LDAP_STAILQ_INIT(&backendInfo);
/* destroy frontend database */
bd = frontendDB;
if ( bd ) {
if ( bd->bd_info->bi_db_destroy ) {
bd->bd_info->bi_db_destroy( bd );
}
ber_bvarray_free( bd->be_suffix );
ber_bvarray_free( bd->be_nsuffix );
if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
free( bd->be_rootdn.bv_val );
}
if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
free( bd->be_rootndn.bv_val );
}
if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
free( bd->be_rootpw.bv_val );
}
acl_destroy( bd->be_acl, frontendDB->be_acl );
if ( bd->be_replogfile != NULL ) {
free( bd->be_replogfile );
}
assert( bd->be_replica == NULL );
}
return 0;
}
BackendInfo* backend_info(const char *type)
{
BackendInfo *bi;
/* search for the backend type */
LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
if( strcasecmp(bi->bi_type, type) == 0 ) {
return bi;
}
}
return NULL;
}
BackendDB *
backend_db_init(
const char *type,
BackendDB *be )
{
BackendInfo *bi = backend_info(type);
int rc = 0;
if( bi == NULL ) {
fprintf( stderr, "Unrecognized database type (%s)\n", type );
return NULL;
}
/* If be is provided, treat it as private. Otherwise allocate
* one and add it to the global list.
*/
if ( !be ) {
be = ch_calloc( 1, sizeof(Backend) );
nbackends++;
LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
}
be->bd_info = bi;
be->be_def_limit = frontendDB->be_def_limit;
be->be_dfltaccess = frontendDB->be_dfltaccess;
be->be_restrictops = frontendDB->be_restrictops;
be->be_requires = frontendDB->be_requires;
be->be_ssf_set = frontendDB->be_ssf_set;
be->be_pcl_mutexp = &be->be_pcl_mutex;
ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
/* assign a default depth limit for alias deref */
be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
if ( bi->bi_db_init ) {
rc = bi->bi_db_init( be );
}
if ( rc != 0 ) {
fprintf( stderr, "database init failed (%s)\n", type );
nbackends--;
return NULL;
}
bi->bi_nDB++;
return( be );
}
void
be_db_close( void )
{
BackendDB *be;
LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
if ( be->bd_info->bi_db_close ) {
be->bd_info->bi_db_close( be );
}
}
if ( frontendDB->bd_info->bi_db_close ) {
(*frontendDB->bd_info->bi_db_close)( frontendDB );
}
}
Backend *
select_backend(
struct berval * dn,
int manageDSAit,
int noSubs )
{
int j;
ber_len_t len, dnlen = dn->bv_len;
Backend *be, *b2 = NULL;
LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
if ( be->be_nsuffix == NULL ) {
continue;
}
for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
{
if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
{
continue;
}
len = be->be_nsuffix[j].bv_len;
if ( len > dnlen ) {
/* suffix is longer than DN */
continue;
}
/*
* input DN is normalized, so the separator check
* need not look at escaping
*/
if ( len && len < dnlen &&
!DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
{
continue;
}
if ( strcmp( be->be_nsuffix[j].bv_val,
&dn->bv_val[dnlen-len] ) == 0 )
{
if( b2 == NULL ) {
b2 = be;
if( manageDSAit && len == dnlen &&
!SLAP_GLUE_SUBORDINATE( be ) ) {
continue;
}
} else {
/* If any parts of the tree are glued, use the first
* match regardless of manageDSAit. Otherwise use the
* last match.
*/
if( !( SLAP_DBFLAGS( be ) & ( SLAP_DBFLAG_GLUE_INSTANCE |
SLAP_DBFLAG_GLUE_SUBORDINATE )))
b2 = be;
}
return b2;
}
}
}
return b2;
}
int
be_issuffix(
Backend *be,
struct berval *bvsuffix )
{
int i;
if ( be->be_nsuffix == NULL ) {
return 0;
}
for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
return 1;
}
}
return 0;
}
int
be_isroot_dn( Backend *be, struct berval *ndn )
{
if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
return 0;
}
return dn_match( &be->be_rootndn, ndn );
}
int
be_slurp_update( Operation *op )
{
return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
be_isupdate_dn( op->o_bd, &op->o_ndn ) );
}
int
be_shadow_update( Operation *op )
{
return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
}
int
be_isupdate_dn( Backend *be, struct berval *ndn )
{
if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
return 0;
}
return dn_match( &be->be_update_ndn, ndn );
}
struct berval *
be_root_dn( Backend *be )
{
return &be->be_rootdn;
}
int
be_isroot( Operation *op )
{
return be_isroot_dn( op->o_bd, &op->o_ndn );
}
int
be_isroot_pw( Operation *op )
{
int result;
if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
return 0;
}
if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
return 0;
}
#ifdef SLAPD_SPASSWD
ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
op->o_conn->c_sasl_authctx, NULL );
#endif
result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
#ifdef SLAPD_SPASSWD
ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
#endif
return result == 0;
}
int
be_entry_release_rw(
Operation *op,
Entry *e,
int rw )
{
if ( op->o_bd->be_release ) {
/* free and release entry from backend */
return op->o_bd->be_release( op, e, rw );
} else {
/* free entry */
entry_free( e );
return 0;
}
}
int
backend_unbind( Operation *op, SlapReply *rs )
{
BackendDB *be;
LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
if ( be->be_unbind ) {
op->o_bd = be;
be->be_unbind( op, rs );
}
}
return 0;
}
int
backend_connection_init(
Connection *conn )
{
BackendDB *be;
LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
if ( be->be_connection_init ) {
be->be_connection_init( be, conn );
}
}
return 0;
}
int
backend_connection_destroy(
Connection *conn )
{
BackendDB *be;
LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
if ( be->be_connection_destroy ) {
be->be_connection_destroy( be, conn);
}
}
return 0;
}
int
backend_check_controls(
Operation *op,
SlapReply *rs )
{
LDAPControl **ctrls = op->o_ctrls;
rs->sr_err = LDAP_SUCCESS;
if( ctrls ) {
for( ; *ctrls != NULL ; ctrls++ ) {
int cid;
switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
case LDAP_CONTROL_NOT_FOUND:
/* unrecognized control */
if ( (*ctrls)->ldctl_iscritical ) {
/* should not be reachable */
Debug( LDAP_DEBUG_ANY,
"backend_check_controls: unrecognized control: %s\n",
(*ctrls)->ldctl_oid, 0, 0 );
assert( 0 );
}
break;
case LDAP_COMPARE_FALSE:
if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
/* Per RFC 2251 (and LDAPBIS discussions), if the control
* is recognized and appropriate for the operation (which
* we've already verified), then the server should make
* use of the control when performing the operation.
*
* Here we find that operation extended by the control
* is unavailable in a particular context, and the control
* is marked Critical, hence the return of
* unwillingToPerform.
*/
rs->sr_text = "critical control unavailable in context";
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
goto done;
}
break;
case LDAP_COMPARE_TRUE:
break;
default:
/* unreachable */
Debug( LDAP_DEBUG_ANY,
"backend_check_controls: unable to check control: %s\n",
(*ctrls)->ldctl_oid, 0, 0 );
assert( 0 );
rs->sr_text = "unable to check control";
rs->sr_err = LDAP_OTHER;
goto done;
}
}
}
/* temporarily removed */
#if 0
/* check should be generalized */
if( get_manageDIT(op) && !be_isroot(op)) {
rs->sr_text = "requires manager authorization";
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
}
#endif
done:;
return rs->sr_err;
}
int
backend_check_restrictions(
Operation *op,
SlapReply *rs,
struct berval *opdata )
{
slap_mask_t restrictops;
slap_mask_t requires;
slap_mask_t opflag;
slap_mask_t exopflag = 0;
slap_ssf_set_t *ssf;
int updateop = 0;
int starttls = 0;
int session = 0;
if ( op->o_bd ) {
int rc = SLAP_CB_CONTINUE;
if ( op->o_bd->be_chk_controls ) {
rc = ( *op->o_bd->be_chk_controls )( op, rs );
}
if ( rc == SLAP_CB_CONTINUE ) {
rc = backend_check_controls( op, rs );
}
if ( rc != LDAP_SUCCESS ) {
return rs->sr_err;
}
restrictops = op->o_bd->be_restrictops;
requires = op->o_bd->be_requires;
ssf = &op->o_bd->be_ssf_set;
} else {
restrictops = frontendDB->be_restrictops;
requires = frontendDB->be_requires;
ssf = &frontendDB->be_ssf_set;
}
switch( op->o_tag ) {
case LDAP_REQ_ADD:
opflag = SLAP_RESTRICT_OP_ADD;
updateop++;
break;
case LDAP_REQ_BIND:
opflag = SLAP_RESTRICT_OP_BIND;
session++;
break;
case LDAP_REQ_COMPARE:
opflag = SLAP_RESTRICT_OP_COMPARE;
break;
case LDAP_REQ_DELETE:
updateop++;
opflag = SLAP_RESTRICT_OP_DELETE;
break;
case LDAP_REQ_EXTENDED:
opflag = SLAP_RESTRICT_OP_EXTENDED;
if( !opdata ) {
/* treat unspecified as a modify */
opflag = SLAP_RESTRICT_OP_MODIFY;
updateop++;
break;
}
if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
session++;
starttls++;
exopflag = SLAP_RESTRICT_EXOP_START_TLS;
break;
}
if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
break;
}
if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
exopflag = SLAP_RESTRICT_EXOP_CANCEL;
break;
}
if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
updateop++;
break;
}
/* treat everything else as a modify */
opflag = SLAP_RESTRICT_OP_MODIFY;
updateop++;
break;
case LDAP_REQ_MODIFY:
updateop++;
opflag = SLAP_RESTRICT_OP_MODIFY;
break;
case LDAP_REQ_RENAME:
updateop++;
opflag = SLAP_RESTRICT_OP_RENAME;
break;
case LDAP_REQ_SEARCH:
opflag = SLAP_RESTRICT_OP_SEARCH;
break;
case LDAP_REQ_UNBIND:
session++;
opflag = 0;
break;
default:
rs->sr_text = "restrict operations internal error";
rs->sr_err = LDAP_OTHER;
return rs->sr_err;
}
if ( !starttls ) {
/* these checks don't apply to StartTLS */
rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
if( op->o_transport_ssf < ssf->sss_transport ) {
rs->sr_text = op->o_transport_ssf
? "stronger transport confidentiality required"
: "transport confidentiality required";
return rs->sr_err;
}
if( op->o_tls_ssf < ssf->sss_tls ) {
rs->sr_text = op->o_tls_ssf
? "stronger TLS confidentiality required"
: "TLS confidentiality required";
return rs->sr_err;
}
if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
/* simple bind specific check */
if( op->o_ssf < ssf->sss_simple_bind ) {
rs->sr_text = op->o_ssf
? "stronger confidentiality required"
: "confidentiality required";
return rs->sr_err;
}
}
if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
/* these checks don't apply to SASL bind */
if( op->o_sasl_ssf < ssf->sss_sasl ) {
rs->sr_text = op->o_sasl_ssf
? "stronger SASL confidentiality required"
: "SASL confidentiality required";
return rs->sr_err;
}
if( op->o_ssf < ssf->sss_ssf ) {
rs->sr_text = op->o_ssf
? "stronger confidentiality required"
: "confidentiality required";
return rs->sr_err;
}
}
if( updateop ) {
if( op->o_transport_ssf < ssf->sss_update_transport ) {
rs->sr_text = op->o_transport_ssf
? "stronger transport confidentiality required for update"
: "transport confidentiality required for update";
return rs->sr_err;
}
if( op->o_tls_ssf < ssf->sss_update_tls ) {
rs->sr_text = op->o_tls_ssf
? "stronger TLS confidentiality required for update"
: "TLS confidentiality required for update";
return rs->sr_err;
}
if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
rs->sr_text = op->o_sasl_ssf
? "stronger SASL confidentiality required for update"
: "SASL confidentiality required for update";
return rs->sr_err;
}
if( op->o_ssf < ssf->sss_update_ssf ) {
rs->sr_text = op->o_ssf
? "stronger confidentiality required for update"
: "confidentiality required for update";
return rs->sr_err;
}
if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
BER_BVISEMPTY( &op->o_ndn ) )
{
rs->sr_text = "modifications require authentication";
rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
return rs->sr_err;
}
#ifdef SLAP_X_LISTENER_MOD
if ( op->o_conn->c_listener &&
! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
{
/* no "w" mode means readonly */
rs->sr_text = "modifications not allowed on this listener";
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
return rs->sr_err;
}
#endif /* SLAP_X_LISTENER_MOD */
}
}
if ( !session ) {
/* these checks don't apply to Bind, StartTLS, or Unbind */
if( requires & SLAP_REQUIRE_STRONG ) {
/* should check mechanism */
if( ( op->o_transport_ssf < ssf->sss_transport
&& op->o_authtype == LDAP_AUTH_SIMPLE )
|| BER_BVISEMPTY( &op->o_dn ) )
{
rs->sr_text = "strong(er) authentication required";
rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
return rs->sr_err;
}
}
if( requires & SLAP_REQUIRE_SASL ) {
if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
rs->sr_text = "SASL authentication required";
rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
return rs->sr_err;
}
}
if( requires & SLAP_REQUIRE_AUTHC ) {
if( BER_BVISEMPTY( &op->o_dn ) ) {
rs->sr_text = "authentication required";
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
return rs->sr_err;
}
}
if( requires & SLAP_REQUIRE_BIND ) {
int version;
ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
version = op->o_conn->c_protocol;
ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
if( !version ) {
/* no bind has occurred */
rs->sr_text = "BIND required";
rs->sr_err = LDAP_OPERATIONS_ERROR;
return rs->sr_err;
}
}
if( requires & SLAP_REQUIRE_LDAP_V3 ) {
if( op->o_protocol < LDAP_VERSION3 ) {
/* no bind has occurred */
rs->sr_text = "operation restricted to LDAPv3 clients";
rs->sr_err = LDAP_OPERATIONS_ERROR;
return rs->sr_err;
}
}
#ifdef SLAP_X_LISTENER_MOD
if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
if ( op->o_conn->c_listener &&
!( op->o_conn->c_listener->sl_perms & S_IXOTH ))
{
/* no "x" mode means bind required */
rs->sr_text = "bind required on this listener";
rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
return rs->sr_err;
}
}
if ( !starttls && !updateop ) {
if ( op->o_conn->c_listener &&
!( op->o_conn->c_listener->sl_perms &
( !BER_BVISEMPTY( &op->o_dn )
? (S_IRUSR|S_IROTH) : S_IROTH )))
{
/* no "r" mode means no read */
rs->sr_text = "read not allowed on this listener";
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
return rs->sr_err;
}
}
#endif /* SLAP_X_LISTENER_MOD */
}
if( ( restrictops & opflag )
|| ( exopflag && ( restrictops & exopflag ) ) ) {
if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
rs->sr_text = "read operations restricted";
} else if ( restrictops & exopflag ) {
rs->sr_text = "extended operation restricted";
} else {
rs->sr_text = "operation restricted";
}
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
return rs->sr_err;
}
rs->sr_err = LDAP_SUCCESS;
return rs->sr_err;
}
int backend_check_referrals( Operation *op, SlapReply *rs )
{
rs->sr_err = LDAP_SUCCESS;
if( op->o_bd->be_chk_referrals ) {
rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
send_ldap_result( op, rs );
}
}
return rs->sr_err;
}
int
be_entry_get_rw(
Operation *op,
struct berval *ndn,
ObjectClass *oc,
AttributeDescription *at,
int rw,
Entry **e )
{
*e = NULL;
if ( op->o_bd == NULL ) {
return LDAP_NO_SUCH_OBJECT;
}
if ( op->o_bd->be_fetch ) {
return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
}
return LDAP_UNWILLING_TO_PERFORM;
}
int
fe_acl_group(
Operation *op,
Entry *target,
struct berval *gr_ndn,
struct berval *op_ndn,
ObjectClass *group_oc,
AttributeDescription *group_at )
{
Entry *e;
void *o_priv = op->o_private, *e_priv = NULL;
Attribute *a;
int rc;
GroupAssertion *g;
Backend *be = op->o_bd;
op->o_bd = select_backend( gr_ndn, 0, 0 );
for ( g = op->o_groups; g; g = g->ga_next ) {
if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
{
continue;
}
if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
break;
}
}
if ( g ) {
rc = g->ga_res;
goto done;
}
if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
e = target;
rc = 0;
} else {
op->o_private = NULL;
rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
e_priv = op->o_private;
op->o_private = o_priv;
}
if ( e ) {
a = attr_find( e->e_attrs, group_at );
if ( a ) {
/* If the attribute is a subtype of labeledURI, treat this as
* a dynamic group ala groupOfURLs
*/
if (is_at_subtype( group_at->ad_type,
slap_schema.si_ad_labeledURI->ad_type ) )
{
int i;
LDAPURLDesc *ludp;
struct berval bv, nbase;
Filter *filter;
Entry *user;
void *user_priv = NULL;
Backend *b2 = op->o_bd;
if ( target && dn_match( &target->e_nname, op_ndn ) ) {
user = target;
} else {
op->o_bd = select_backend( op_ndn, 0, 0 );
op->o_private = NULL;
rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
user_priv = op->o_private;
op->o_private = o_priv;
}
if ( rc == 0 ) {
rc = LDAP_COMPARE_FALSE;
for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
LDAP_URL_SUCCESS )
{
continue;
}
BER_BVZERO( &nbase );
/* host part must be empty */
/* attrs and extensions parts must be empty */
if ( ( ludp->lud_host && *ludp->lud_host ) ||
ludp->lud_attrs || ludp->lud_exts )
{
goto loopit;
}
ber_str2bv( ludp->lud_dn, 0, 0, &bv );
if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
op->o_tmpmemctx ) != LDAP_SUCCESS )
{
goto loopit;
}
switch ( ludp->lud_scope ) {
case LDAP_SCOPE_BASE:
if ( !dn_match( &nbase, op_ndn ) ) {
goto loopit;
}
break;
case LDAP_SCOPE_ONELEVEL:
dnParent( op_ndn, &bv );
if ( !dn_match( &nbase, &bv ) ) {
goto loopit;
}
break;
case LDAP_SCOPE_SUBTREE:
if ( !dnIsSuffix( op_ndn, &nbase ) ) {
goto loopit;
}
break;
case LDAP_SCOPE_SUBORDINATE:
if ( dn_match( &nbase, op_ndn ) ||
!dnIsSuffix( op_ndn, &nbase ) )
{
goto loopit;
}
}
filter = str2filter_x( op, ludp->lud_filter );
if ( filter ) {
if ( test_filter( NULL, user, filter ) ==
LDAP_COMPARE_TRUE )
{
rc = 0;
}
filter_free_x( op, filter );
}
loopit:
ldap_free_urldesc( ludp );
if ( !BER_BVISNULL( &nbase ) ) {
op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
}
if ( rc == 0 ) break;
}
if ( user != target ) {
op->o_private = user_priv;
be_entry_release_r( op, user );
op->o_private = o_priv;
}
}
op->o_bd = b2;
} else {
rc = value_find_ex( group_at,
SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
a->a_nvals, op_ndn, op->o_tmpmemctx );
if ( rc == LDAP_NO_SUCH_ATTRIBUTE )
rc = LDAP_COMPARE_FALSE;
}
} else {
rc = LDAP_NO_SUCH_ATTRIBUTE;
}
if ( e != target ) {
op->o_private = e_priv;
be_entry_release_r( op, e );
op->o_private = o_priv;
}
} else {
rc = LDAP_NO_SUCH_OBJECT;
}
if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
op->o_tmpmemctx );
g->ga_be = op->o_bd;
g->ga_oc = group_oc;
g->ga_at = group_at;
g->ga_res = rc;
g->ga_len = gr_ndn->bv_len;
strcpy( g->ga_ndn, gr_ndn->bv_val );
g->ga_next = op->o_groups;
op->o_groups = g;
}
done:
op->o_bd = be;
return rc;
}
int
backend_group(
Operation *op,
Entry *target,
struct berval *gr_ndn,
struct berval *op_ndn,
ObjectClass *group_oc,
AttributeDescription *group_at )
{
int rc;
BackendDB *be_orig;
if ( op->o_abandon ) {
return SLAPD_ABANDON;
}
be_orig = op->o_bd;
op->o_bd = frontendDB;
#ifdef SLAP_OVERLAY_ACCESS
rc = frontendDB->be_group( op, target, gr_ndn,
op_ndn, group_oc, group_at );
#else /* ! SLAP_OVERLAY_ACCESS */
rc = fe_acl_group( op, target, gr_ndn,
op_ndn, group_oc, group_at );
#endif /* ! SLAP_OVERLAY_ACCESS */
op->o_bd = be_orig;
return rc;
}
int
fe_acl_attribute(
Operation *op,
Entry *target,
struct berval *edn,
AttributeDescription *entry_at,
BerVarray *vals,
slap_access_t access )
{
Entry *e = NULL;
void *o_priv = op->o_private, *e_priv = NULL;
Attribute *a = NULL;
int freeattr = 0, i, j, rc = LDAP_SUCCESS;
AccessControlState acl_state = ACL_STATE_INIT;
Backend *be = op->o_bd;
op->o_bd = select_backend( edn, 0, 0 );
if ( target && dn_match( &target->e_nname, edn ) ) {
e = target;
} else {
op->o_private = NULL;
rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
e_priv = op->o_private;
op->o_private = o_priv;
}
if ( e ) {
a = attr_find( e->e_attrs, entry_at );
if ( a == NULL ) {
SlapReply rs = { 0 };
AttributeName anlist[ 2 ];
anlist[ 0 ].an_name = entry_at->ad_cname;
anlist[ 0 ].an_desc = entry_at;
BER_BVZERO( &anlist[ 1 ].an_name );
rs.sr_attrs = anlist;
/* NOTE: backend_operational() is also called
* when returning results, so it's supposed
* to do no harm to entries */
rs.sr_entry = e;
rc = backend_operational( op, &rs );
rs.sr_entry = NULL;
if ( rc == LDAP_SUCCESS ) {
if ( rs.sr_operational_attrs ) {
freeattr = 1;
a = rs.sr_operational_attrs;
} else {
rc = LDAP_NO_SUCH_ATTRIBUTE;
}
}
}
if ( a ) {
BerVarray v;
if ( op->o_conn && access > ACL_NONE &&
access_allowed( op, e, entry_at, NULL,
access, &acl_state ) == 0 )
{
rc = LDAP_INSUFFICIENT_ACCESS;
goto freeit;
}
for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
;
v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
op->o_tmpmemctx );
for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
{
if ( op->o_conn && access > ACL_NONE &&
access_allowed( op, e, entry_at,
&a->a_nvals[i],
access,
&acl_state ) == 0 )
{
continue;
}
ber_dupbv_x( &v[j], &a->a_nvals[i],
op->o_tmpmemctx );
if ( !BER_BVISNULL( &v[j] ) ) {
j++;
}
}
if ( j == 0 ) {
op->o_tmpfree( v, op->o_tmpmemctx );
*vals = NULL;
rc = LDAP_INSUFFICIENT_ACCESS;
} else {
BER_BVZERO( &v[j] );
*vals = v;
rc = LDAP_SUCCESS;
}
}
freeit: if ( e != target ) {
op->o_private = e_priv;
be_entry_release_r( op, e );
op->o_private = o_priv;
}
if ( freeattr ) {
attr_free( a );
}
}
op->o_bd = be;
return rc;
}
int
backend_attribute(
Operation *op,
Entry *target,
struct berval *edn,
AttributeDescription *entry_at,
BerVarray *vals,
slap_access_t access )
{
int rc;
BackendDB *be_orig;
be_orig = op->o_bd;
op->o_bd = frontendDB;
#ifdef SLAP_OVERLAY_ACCESS
rc = frontendDB->be_attribute( op, target, edn,
entry_at, vals, access );
#else /* !SLAP_OVERLAY_ACCESS */
rc = fe_acl_attribute( op, target, edn,
entry_at, vals, access );
#endif /* !SLAP_OVERLAY_ACCESS */
op->o_bd = be_orig;
return rc;
}
int
backend_access(
Operation *op,
Entry *target,
struct berval *edn,
AttributeDescription *entry_at,
struct berval *nval,
slap_access_t access,
slap_mask_t *mask )
{
Entry *e = NULL;
void *o_priv = op->o_private, *e_priv = NULL;
int rc = LDAP_INSUFFICIENT_ACCESS;
Backend *be = op->o_bd;
/* pedantic */
assert( op != NULL );
assert( op->o_conn != NULL );
assert( edn != NULL );
assert( access > ACL_NONE );
op->o_bd = select_backend( edn, 0, 0 );
if ( target && dn_match( &target->e_nname, edn ) ) {
e = target;
} else {
op->o_private = NULL;
rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
e_priv = op->o_private;
op->o_private = o_priv;
}
if ( e ) {
Attribute *a = NULL;
int freeattr = 0;
if ( entry_at == NULL ) {
entry_at = slap_schema.si_ad_entry;
}
if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
{
if ( access_allowed_mask( op, e, entry_at,
NULL, access, NULL, mask ) == 0 )
{
rc = LDAP_INSUFFICIENT_ACCESS;
} else {
rc = LDAP_SUCCESS;
}
} else {
a = attr_find( e->e_attrs, entry_at );
if ( a == NULL ) {
SlapReply rs = { 0 };
AttributeName anlist[ 2 ];
anlist[ 0 ].an_name = entry_at->ad_cname;
anlist[ 0 ].an_desc = entry_at;
BER_BVZERO( &anlist[ 1 ].an_name );
rs.sr_attrs = anlist;
rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
/* NOTE: backend_operational() is also called
* when returning results, so it's supposed
* to do no harm to entries */
rs.sr_entry = e;
rc = backend_operational( op, &rs );
rs.sr_entry = NULL;
if ( rc == LDAP_SUCCESS ) {
if ( rs.sr_operational_attrs ) {
freeattr = 1;
a = rs.sr_operational_attrs;
} else {
rc = LDAP_NO_SUCH_OBJECT;
}
}
}
if ( a ) {
if ( access_allowed_mask( op, e, entry_at,
nval, access, NULL, mask ) == 0 )
{
rc = LDAP_INSUFFICIENT_ACCESS;
goto freeit;
}
rc = LDAP_SUCCESS;
}
}
freeit: if ( e != target ) {
op->o_private = e_priv;
be_entry_release_r( op, e );
op->o_private = o_priv;
}
if ( freeattr ) {
attr_free( a );
}
}
op->o_bd = be;
return rc;
}
int
fe_aux_operational(
Operation *op,
SlapReply *rs )
{
Attribute **ap;
int rc = 0;
BackendDB *be_orig;
for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
/* just count them */ ;
/*
* If operational attributes (allegedly) are required,
* and the backend supports specific operational attributes,
* add them to the attribute list
*/
if ( !( rs->sr_flags & REP_NO_ENTRYDN )
&& ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
{
*ap = slap_operational_entryDN( rs->sr_entry );
ap = &(*ap)->a_next;
}
if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
&& ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
{
*ap = slap_operational_subschemaSubentry( op->o_bd );
ap = &(*ap)->a_next;
}
if ( op->o_bd != NULL )
{
/* Let the overlays have a chance at this */
be_orig = op->o_bd;
op->o_bd = select_backend( &op->o_req_ndn, 0, 0 );
if ( !be_match( op->o_bd, frontendDB ) &&
( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
op->o_bd != NULL && op->o_bd->be_operational != NULL )
{
rc = op->o_bd->be_operational( op, rs );
}
op->o_bd = be_orig;
}
return rc;
}
int backend_operational( Operation *op, SlapReply *rs )
{
int rc;
BackendDB *be_orig;
/* Moved this into the frontend so global overlays are called */
be_orig = op->o_bd;
op->o_bd = frontendDB;
rc = frontendDB->be_operational( op, rs );
op->o_bd = be_orig;
return rc;
}
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