/* $OpenLDAP: pkg/ldap/servers/slapd/back-meta/bind.c,v 1.40.2.31 2007/03/09 16:23:16 ando Exp $ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1999-2007 The OpenLDAP Foundation.
* Portions Copyright 2001-2003 Pierangelo Masarati.
* Portions Copyright 1999-2003 Howard Chu.
* 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>.
*/
/* ACKNOWLEDGEMENTS:
* This work was initially developed by the Howard Chu for inclusion
* in OpenLDAP Software and subsequently enhanced by Pierangelo
* Masarati.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#define AVL_INTERNAL
#include "slap.h"
#include "../back-ldap/back-ldap.h"
#include "back-meta.h"
#undef ldap_debug /* silence a warning in ldap-int.h */
#include "../../../libraries/libldap/ldap-int.h"
#include "lutil_ldap.h"
static int
meta_back_proxy_authz_bind(
metaconn_t *mc,
int candidate,
Operation *op,
SlapReply *rs,
ldap_back_send_t sendok );
static int
meta_back_single_bind(
Operation *op,
SlapReply *rs,
metaconn_t *mc,
int candidate );
int
meta_back_bind( Operation *op, SlapReply *rs )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
metaconn_t *mc = NULL;
int rc = LDAP_OTHER,
i,
gotit = 0,
isroot = 0;
SlapReply *candidates = meta_back_candidates_get( op );
rs->sr_err = LDAP_SUCCESS;
Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
op->o_log_prefix, op->o_req_dn.bv_val, 0 );
/* the test on the bind method should be superfluous */
if ( op->orb_method == LDAP_AUTH_SIMPLE
&& be_isroot_dn( op->o_bd, &op->o_req_ndn ) )
{
if ( !be_isroot_pw( op ) ) {
rs->sr_err = LDAP_INVALID_CREDENTIALS;
rs->sr_text = NULL;
send_ldap_result( op, rs );
return rs->sr_err;
}
if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
rs->sr_err = LDAP_SUCCESS;
rs->sr_text = NULL;
/* frontend will return success */
return rs->sr_err;
}
isroot = 1;
}
/* we need meta_back_getconn() not send result even on error,
* because we want to intercept the error and make it
* invalidCredentials */
mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
if ( !mc ) {
if ( StatslogTest( LDAP_DEBUG_ANY ) ) {
char buf[ SLAP_TEXT_BUFLEN ];
snprintf( buf, sizeof( buf ),
"meta_back_bind: no target "
"for dn \"%s\" (%d%s%s).",
op->o_req_dn.bv_val, rs->sr_err,
rs->sr_text ? ". " : "",
rs->sr_text ? rs->sr_text : "" );
Debug( LDAP_DEBUG_ANY,
"%s %s\n",
op->o_log_prefix, buf, 0 );
}
/* FIXME: there might be cases where we don't want
* to map the error onto invalidCredentials */
switch ( rs->sr_err ) {
case LDAP_NO_SUCH_OBJECT:
case LDAP_UNWILLING_TO_PERFORM:
rs->sr_err = LDAP_INVALID_CREDENTIALS;
rs->sr_text = NULL;
break;
}
send_ldap_result( op, rs );
return rs->sr_err;
}
/*
* Each target is scanned ...
*/
mc->mc_authz_target = META_BOUND_NONE;
for ( i = 0; i < mi->mi_ntargets; i++ ) {
metatarget_t *mt = mi->mi_targets[ i ];
int lerr;
/*
* Skip non-candidates
*/
if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
continue;
}
if ( gotit == 0 ) {
/* set rc to LDAP_SUCCESS only if at least
* one candidate has been tried */
rc = LDAP_SUCCESS;
gotit = 1;
} else if ( isroot == 0 ) {
/*
* A bind operation is expected to have
* ONE CANDIDATE ONLY!
*/
Debug( LDAP_DEBUG_ANY,
"### %s meta_back_bind: more than one"
" candidate selected...\n",
op->o_log_prefix, 0, 0 );
}
if ( isroot ) {
if ( mt->mt_idassert_authmethod == LDAP_AUTH_NONE
|| BER_BVISNULL( &mt->mt_idassert_authcDN ) )
{
metasingleconn_t *msc = &mc->mc_conns[ i ];
/* skip the target if no pseudorootdn is provided */
if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
ch_free( msc->msc_bound_ndn.bv_val );
BER_BVZERO( &msc->msc_bound_ndn );
}
if ( !BER_BVISNULL( &msc->msc_cred ) ) {
/* destroy sensitive data */
memset( msc->msc_cred.bv_val, 0,
msc->msc_cred.bv_len );
ch_free( msc->msc_cred.bv_val );
BER_BVZERO( &msc->msc_cred );
}
continue;
}
(void)meta_back_proxy_authz_bind( mc, i, op, rs, LDAP_BACK_DONTSEND );
lerr = rs->sr_err;
} else {
lerr = meta_back_single_bind( op, rs, mc, i );
}
if ( lerr != LDAP_SUCCESS ) {
rc = rs->sr_err = lerr;
/* FIXME: in some cases (e.g. unavailable)
* do not assume it's not candidate; rather
* mark this as an error to be eventually
* reported to client */
META_CANDIDATE_CLEAR( &candidates[ i ] );
break;
}
}
/* must re-insert if local DN changed as result of bind */
if ( rc == LDAP_SUCCESS ) {
if ( isroot ) {
mc->mc_authz_target = META_BOUND_ALL;
ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
}
if ( !LDAP_BACK_PCONN_ISPRIV( mc )
&& !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) )
{
metaconn_t *tmpmc;
int lerr;
/* wait for all other ops to release the connection */
retry_lock:;
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
if ( mc->mc_refcnt > 1 ) {
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
ldap_pvt_thread_yield();
goto retry_lock;
}
assert( mc->mc_refcnt == 1 );
#if META_BACK_PRINT_CONNTREE > 0
meta_back_print_conntree( mi, ">>> meta_back_bind" );
#endif /* META_BACK_PRINT_CONNTREE */
tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
meta_back_conndn_cmp );
assert( tmpmc == mc );
/* delete all cached connections with the current connection */
if ( LDAP_BACK_SINGLECONN( mi ) ) {
while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
{
Debug( LDAP_DEBUG_TRACE,
"=>meta_back_bind: destroying conn %ld (refcnt=%u)\n",
LDAP_BACK_PCONN_ID( mc ), mc->mc_refcnt, 0 );
if ( tmpmc->mc_refcnt != 0 ) {
/* taint it */
LDAP_BACK_CONN_TAINTED_SET( tmpmc );
} else {
/*
* Needs a test because the handler may be corrupted,
* and calling ldap_unbind on a corrupted header results
* in a segmentation fault
*/
meta_back_conn_free( tmpmc );
}
}
}
ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
if ( isroot ) {
LDAP_BACK_CONN_ISPRIV_SET( mc );
LDAP_BACK_PCONN_SET( mc, op );
}
lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
meta_back_conndn_cmp, meta_back_conndn_dup );
#if META_BACK_PRINT_CONNTREE > 0
meta_back_print_conntree( mi, "<<< meta_back_bind" );
#endif /* META_BACK_PRINT_CONNTREE */
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
if ( lerr == -1 ) {
/* we can do this because mc_refcnt == 1 */
assert( mc->mc_refcnt == 1 );
mc->mc_refcnt = 0;
meta_back_conn_free( mc );
mc = NULL;
}
}
}
if ( mc != NULL ) {
meta_back_release_conn( mi, mc );
}
/*
* rc is LDAP_SUCCESS if at least one bind succeeded,
* err is the last error that occurred during a bind;
* if at least (and at most?) one bind succeeds, fine.
*/
if ( rc != LDAP_SUCCESS ) {
/*
* deal with bind failure ...
*/
/*
* no target was found within the naming context,
* so bind must fail with invalid credentials
*/
if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
rs->sr_err = LDAP_INVALID_CREDENTIALS;
} else {
rs->sr_err = slap_map_api2result( rs );
}
send_ldap_result( op, rs );
return rs->sr_err;
}
return LDAP_SUCCESS;
}
static int
meta_back_bind_op_result(
Operation *op,
SlapReply *rs,
metaconn_t *mc,
int candidate,
int msgid,
ldap_back_send_t sendok )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
metatarget_t *mt = mi->mi_targets[ candidate ];
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
LDAPMessage *res;
struct timeval tv;
int rc;
int nretries = mt->mt_nretries;
char buf[ SLAP_TEXT_BUFLEN ];
Debug( LDAP_DEBUG_TRACE,
">>> %s meta_back_bind_op_result[%d]\n",
op->o_log_prefix, candidate, 0 );
if ( rs->sr_err == LDAP_SUCCESS ) {
time_t stoptime = (time_t)(-1),
timeout;
int timeout_err = op->o_protocol >= LDAP_VERSION3 ?
LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
const char *timeout_text = "Operation timed out";
slap_op_t opidx = slap_req2op( op->o_tag );
/* since timeout is not specified, compute and use
* the one specific to the ongoing operation */
if ( opidx == LDAP_REQ_SEARCH ) {
if ( op->ors_tlimit <= 0 ) {
timeout = 0;
} else {
timeout = op->ors_tlimit;
timeout_err = LDAP_TIMELIMIT_EXCEEDED;
timeout_text = NULL;
}
} else {
timeout = mt->mt_timeout[ opidx ];
}
/* better than nothing :) */
if ( timeout == 0 ) {
if ( mi->mi_idle_timeout ) {
timeout = mi->mi_idle_timeout;
} else if ( mi->mi_conn_ttl ) {
timeout = mi->mi_conn_ttl;
}
}
if ( timeout ) {
stoptime = op->o_time + timeout;
}
LDAP_BACK_TV_SET( &tv );
/*
* handle response!!!
*/
retry:;
rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
switch ( rc ) {
case 0:
if ( nretries != META_RETRY_NEVER
|| ( timeout && slap_get_time() <= stoptime ) )
{
ldap_pvt_thread_yield();
if ( nretries > 0 ) {
nretries--;
}
tv = mt->mt_bind_timeout;
goto retry;
}
/* don't let anyone else use this handler,
* because there's a pending bind that will not
* be acknowledged */
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
assert( LDAP_BACK_CONN_BINDING( msc ) );
#ifdef DEBUG_205
Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
op->o_log_prefix, candidate, (void *)msc->msc_ld );
#endif /* DEBUG_205 */
meta_clear_one_candidate( op, mc, candidate );
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
rs->sr_err = timeout_err;
rs->sr_text = timeout_text;
break;
case -1:
ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
&rs->sr_err );
snprintf( buf, sizeof( buf ),
"err=%d (%s) nretries=%d",
rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
Debug( LDAP_DEBUG_ANY,
"### %s meta_back_bind_op_result[%d]: %s.\n",
op->o_log_prefix, candidate, buf );
break;
default:
/* only touch when activity actually took place... */
if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
msc->msc_time = op->o_time;
}
/* FIXME: matched? referrals? response controls? */
rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
NULL, NULL, NULL, NULL, 1 );
if ( rc != LDAP_SUCCESS ) {
rs->sr_err = rc;
}
break;
}
}
rs->sr_err = slap_map_api2result( rs );
Debug( LDAP_DEBUG_TRACE,
"<<< %s meta_back_bind_op_result[%d] err=%d\n",
op->o_log_prefix, candidate, rs->sr_err );
return rs->sr_err;
}
/*
* meta_back_single_bind
*
* attempts to perform a bind with creds
*/
static int
meta_back_single_bind(
Operation *op,
SlapReply *rs,
metaconn_t *mc,
int candidate )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
metatarget_t *mt = mi->mi_targets[ candidate ];
struct berval mdn = BER_BVNULL;
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
int msgid;
dncookie dc;
if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
ch_free( msc->msc_bound_ndn.bv_val );
BER_BVZERO( &msc->msc_bound_ndn );
}
if ( !BER_BVISNULL( &msc->msc_cred ) ) {
/* destroy sensitive data */
memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
ch_free( msc->msc_cred.bv_val );
BER_BVZERO( &msc->msc_cred );
}
/*
* Rewrite the bind dn if needed
*/
dc.target = mt;
dc.conn = op->o_conn;
dc.rs = rs;
dc.ctx = "bindDN";
if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
rs->sr_text = "DN rewrite error";
rs->sr_err = LDAP_OTHER;
return rs->sr_err;
}
/* FIXME: this fixes the bind problem right now; we need
* to use the asynchronous version to get the "matched"
* and more in case of failure ... */
/* FIXME: should we check if at least some of the op->o_ctrls
* can/should be passed? */
rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
LDAP_SASL_SIMPLE, &op->orb_cred,
op->o_ctrls, NULL, &msgid );
meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
if ( rs->sr_err != LDAP_SUCCESS ) {
goto return_results;
}
/* If defined, proxyAuthz will be used also when
* back-ldap is the authorizing backend; for this
* purpose, a successful bind is followed by a
* bind with the configured identity assertion */
/* NOTE: use with care */
if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
goto return_results;
}
goto cache_refresh;
}
ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
LDAP_BACK_CONN_ISBOUND_SET( msc );
mc->mc_authz_target = candidate;
if ( LDAP_BACK_SAVECRED( mi ) ) {
if ( !BER_BVISNULL( &msc->msc_cred ) ) {
memset( msc->msc_cred.bv_val, 0,
msc->msc_cred.bv_len );
}
ber_bvreplace( &msc->msc_cred, &op->orb_cred );
ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
}
cache_refresh:;
if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
&& !BER_BVISEMPTY( &op->o_req_ndn ) )
{
( void )meta_dncache_update_entry( &mi->mi_cache,
&op->o_req_ndn, candidate );
}
return_results:;
if ( mdn.bv_val != op->o_req_dn.bv_val ) {
free( mdn.bv_val );
}
if ( META_BACK_TGT_QUARANTINE( mt ) ) {
meta_back_quarantine( op, rs, candidate );
}
return rs->sr_err;
}
/*
* meta_back_single_dobind
*/
int
meta_back_single_dobind(
Operation *op,
SlapReply *rs,
metaconn_t **mcp,
int candidate,
ldap_back_send_t sendok,
int nretries,
int dolock )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
metatarget_t *mt = mi->mi_targets[ candidate ];
metaconn_t *mc = *mcp;
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
static struct berval cred = BER_BVC( "" );
int msgid;
assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
/* NOTE: this obsoletes pseudorootdn */
if ( op->o_conn != NULL &&
!op->o_do_not_cache &&
( BER_BVISNULL( &msc->msc_bound_ndn ) ||
BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
{
(void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
} else {
/* FIXME: should we check if at least some of the op->o_ctrls
* can/should be passed? */
rs->sr_err = ldap_sasl_bind( msc->msc_ld,
"", LDAP_SASL_SIMPLE, &cred,
NULL, NULL, &msgid );
rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
}
if ( rs->sr_err != LDAP_SUCCESS ) {
if ( dolock ) {
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
}
LDAP_BACK_CONN_BINDING_CLEAR( msc );
if ( META_BACK_ONERR_STOP( mi ) ) {
LDAP_BACK_CONN_TAINTED_SET( mc );
meta_back_release_conn_lock( mi, mc, 0 );
*mcp = NULL;
}
if ( dolock ) {
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
}
}
if ( META_BACK_TGT_QUARANTINE( mt ) ) {
meta_back_quarantine( op, rs, candidate );
}
return rs->sr_err;
}
/*
* meta_back_dobind
*/
int
meta_back_dobind(
Operation *op,
SlapReply *rs,
metaconn_t *mc,
ldap_back_send_t sendok )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
int bound = 0,
i,
isroot = 0;
SlapReply *candidates = meta_back_candidates_get( op );
if ( be_isroot( op ) ) {
isroot = 1;
}
Debug( LDAP_DEBUG_TRACE,
"%s meta_back_dobind: conn=%ld%s\n",
op->o_log_prefix,
LDAP_BACK_PCONN_ID( mc ),
isroot ? " (isroot)" : "" );
/*
* all the targets are bound as pseudoroot
*/
if ( mc->mc_authz_target == META_BOUND_ALL ) {
bound = 1;
goto done;
}
for ( i = 0; i < mi->mi_ntargets; i++ ) {
metatarget_t *mt = mi->mi_targets[ i ];
metasingleconn_t *msc = &mc->mc_conns[ i ];
int rc;
/*
* Not a candidate
*/
if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
continue;
}
assert( msc->msc_ld != NULL );
/*
* If the target is already bound it is skipped
*/
retry_binding:;
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
if ( LDAP_BACK_CONN_ISBOUND( msc )
|| ( LDAP_BACK_CONN_ISANON( msc )
&& mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
{
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
++bound;
continue;
} else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
{
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
ldap_pvt_thread_yield();
goto retry_binding;
}
LDAP_BACK_CONN_BINDING_SET( msc );
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
rc = meta_back_single_dobind( op, rs, &mc, i,
LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
/*
* NOTE: meta_back_single_dobind() already retries;
* in case of failure, it resets mc...
*/
if ( rc != LDAP_SUCCESS ) {
char buf[ SLAP_TEXT_BUFLEN ];
if ( mc == NULL ) {
/* meta_back_single_dobind() already sent
* response and released connection */
goto send_err;
}
if ( rc == LDAP_UNAVAILABLE ) {
/* FIXME: meta_back_retry() already re-calls
* meta_back_single_dobind() */
if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
goto retry_ok;
}
if ( mc != NULL ) {
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
LDAP_BACK_CONN_BINDING_CLEAR( msc );
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
meta_back_release_conn( mi, mc );
}
return 0;
}
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
LDAP_BACK_CONN_BINDING_CLEAR( msc );
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
snprintf( buf, sizeof( buf ),
"meta_back_dobind[%d]: (%s) err=%d (%s).",
i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
rc, ldap_err2string( rc ) );
Debug( LDAP_DEBUG_ANY,
"%s %s\n",
op->o_log_prefix, buf, 0 );
/*
* null cred bind should always succeed
* as anonymous, so a failure means
* the target is no longer candidate possibly
* due to technical reasons (remote host down?)
* so better clear the handle
*/
/* leave the target candidate, but record the error for later use */
candidates[ i ].sr_err = rc;
if ( META_BACK_ONERR_STOP( mi ) ) {
bound = 0;
goto done;
}
continue;
} /* else */
retry_ok:;
Debug( LDAP_DEBUG_TRACE,
"%s meta_back_dobind[%d]: "
"(%s)\n",
op->o_log_prefix, i,
isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
LDAP_BACK_CONN_BINDING_CLEAR( msc );
if ( isroot ) {
LDAP_BACK_CONN_ISBOUND_SET( msc );
} else {
LDAP_BACK_CONN_ISANON_SET( msc );
}
ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
++bound;
}
done:;
Debug( LDAP_DEBUG_TRACE,
"%s meta_back_dobind: conn=%ld bound=%d\n",
op->o_log_prefix, LDAP_BACK_PCONN_ID( mc ), bound );
if ( bound == 0 ) {
meta_back_release_conn( mi, mc );
send_err:;
if ( sendok & LDAP_BACK_SENDERR ) {
if ( rs->sr_err == LDAP_SUCCESS ) {
rs->sr_err = LDAP_BUSY;
}
send_ldap_result( op, rs );
}
return 0;
}
return ( bound > 0 );
}
/*
* meta_back_default_rebind
*
* This is a callback used for chasing referrals using the same
* credentials as the original user on this session.
*/
int
meta_back_default_rebind(
LDAP *ld,
LDAP_CONST char *url,
ber_tag_t request,
ber_int_t msgid,
void *params )
{
metasingleconn_t *msc = ( metasingleconn_t * )params;
return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
LDAP_SASL_SIMPLE, &msc->msc_cred,
NULL, NULL, NULL );
}
int
meta_back_cancel(
metaconn_t *mc,
Operation *op,
SlapReply *rs,
ber_int_t msgid,
int candidate,
ldap_back_send_t sendok )
{
metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
metatarget_t *mt = mi->mi_targets[ candidate ];
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
int rc = LDAP_OTHER;
Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
op->o_log_prefix, candidate, msgid );
/* default behavior */
if ( META_BACK_TGT_ABANDON( mt ) ) {
rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
} else if ( META_BACK_TGT_CANCEL( mt ) ) {
rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
} else {
assert( 0 );
}
Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
op->o_log_prefix, candidate, rc );
return rc;
}
/*
* FIXME: error return must be handled in a cleaner way ...
*/
int
meta_back_op_result(
metaconn_t *mc,
Operation *op,
SlapReply *rs,
int candidate,
ber_int_t msgid,
time_t timeout,
ldap_back_send_t sendok )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
const char *save_text = rs->sr_text,
*save_matched = rs->sr_matched;
BerVarray save_ref = rs->sr_ref;
LDAPControl **save_ctrls = rs->sr_ctrls;
void *matched_ctx = NULL;
char *matched = NULL;
char *text = NULL;
char **refs = NULL;
LDAPControl **ctrls = NULL;
assert( mc != NULL );
rs->sr_text = NULL;
rs->sr_matched = NULL;
rs->sr_ref = NULL;
rs->sr_ctrls = NULL;
if ( candidate != META_TARGET_NONE ) {
metatarget_t *mt = mi->mi_targets[ candidate ];
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
#define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
if ( ERR_OK( rs->sr_err ) ) {
int rc;
struct timeval tv;
LDAPMessage *res = NULL;
time_t stoptime = (time_t)(-1);
int timeout_err = op->o_protocol >= LDAP_VERSION3 ?
LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
const char *timeout_text = "Operation timed out";
/* if timeout is not specified, compute and use
* the one specific to the ongoing operation */
if ( timeout == (time_t)(-1) ) {
slap_op_t opidx = slap_req2op( op->o_tag );
if ( opidx == SLAP_OP_SEARCH ) {
if ( op->ors_tlimit <= 0 ) {
timeout = 0;
} else {
timeout = op->ors_tlimit;
timeout_err = LDAP_TIMELIMIT_EXCEEDED;
timeout_text = NULL;
}
} else {
timeout = mt->mt_timeout[ opidx ];
}
}
/* better than nothing :) */
if ( timeout == 0 ) {
if ( mi->mi_idle_timeout ) {
timeout = mi->mi_idle_timeout;
} else if ( mi->mi_conn_ttl ) {
timeout = mi->mi_conn_ttl;
}
}
if ( timeout ) {
stoptime = op->o_time + timeout;
}
LDAP_BACK_TV_SET( &tv );
retry:;
rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
switch ( rc ) {
case 0:
if ( timeout && slap_get_time() > stoptime ) {
(void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
rs->sr_err = timeout_err;
rs->sr_text = timeout_text;
break;
}
LDAP_BACK_TV_SET( &tv );
ldap_pvt_thread_yield();
goto retry;
case -1:
ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
&rs->sr_err );
break;
/* otherwise get the result; if it is not
* LDAP_SUCCESS, record it in the reply
* structure (this includes
* LDAP_COMPARE_{TRUE|FALSE}) */
default:
/* only touch when activity actually took place... */
if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
msc->msc_time = op->o_time;
}
rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
&matched, &text, &refs, &ctrls, 1 );
res = NULL;
rs->sr_text = text;
if ( rc != LDAP_SUCCESS ) {
rs->sr_err = rc;
}
/* RFC 4511: referrals can only appear
* if result code is LDAP_REFERRAL */
if ( refs != NULL
&& refs[ 0 ] != NULL
&& refs[ 0 ][ 0 ] != '\0' )
{
if ( rs->sr_err != LDAP_REFERRAL ) {
Debug( LDAP_DEBUG_ANY,
"%s meta_back_op_result[%d]: "
"got referrals with err=%d\n",
op->o_log_prefix,
candidate, rs->sr_err );
} else {
int i;
for ( i = 0; refs[ i ] != NULL; i++ )
/* count */ ;
rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
op->o_tmpmemctx );
for ( i = 0; refs[ i ] != NULL; i++ ) {
ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
}
BER_BVZERO( &rs->sr_ref[ i ] );
}
} else if ( rs->sr_err == LDAP_REFERRAL ) {
Debug( LDAP_DEBUG_ANY,
"%s meta_back_op_result[%d]: "
"got err=%d with null "
"or empty referrals\n",
op->o_log_prefix,
candidate, rs->sr_err );
rs->sr_err = LDAP_NO_SUCH_OBJECT;
}
if ( ctrls != NULL ) {
rs->sr_ctrls = ctrls;
}
}
assert( res == NULL );
}
/* if the error in the reply structure is not
* LDAP_SUCCESS, try to map it from client
* to server error */
if ( !ERR_OK( rs->sr_err ) ) {
rs->sr_err = slap_map_api2result( rs );
/* internal ops ( op->o_conn == NULL )
* must not reply to client */
if ( op->o_conn && !op->o_do_not_cache && matched ) {
/* record the (massaged) matched
* DN into the reply structure */
rs->sr_matched = matched;
}
}
if ( META_BACK_TGT_QUARANTINE( mt ) ) {
meta_back_quarantine( op, rs, candidate );
}
} else {
int i,
err = rs->sr_err;
for ( i = 0; i < mi->mi_ntargets; i++ ) {
metasingleconn_t *msc = &mc->mc_conns[ i ];
char *xtext = NULL;
char *xmatched = NULL;
rs->sr_err = LDAP_SUCCESS;
ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
if ( rs->sr_err != LDAP_SUCCESS ) {
/*
* better check the type of error. In some cases
* (search ?) it might be better to return a
* success if at least one of the targets gave
* positive result ...
*/
ldap_get_option( msc->msc_ld,
LDAP_OPT_ERROR_STRING, &xtext );
if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
ldap_memfree( xtext );
xtext = NULL;
}
ldap_get_option( msc->msc_ld,
LDAP_OPT_MATCHED_DN, &xmatched );
if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
ldap_memfree( xmatched );
xmatched = NULL;
}
rs->sr_err = slap_map_api2result( rs );
if ( StatslogTest( LDAP_DEBUG_ANY ) ) {
char buf[ SLAP_TEXT_BUFLEN ];
snprintf( buf, sizeof( buf ),
"meta_back_op_result[%d] "
"err=%d text=\"%s\" matched=\"%s\"",
i, rs->sr_err,
( xtext ? xtext : "" ),
( xmatched ? xmatched : "" ) );
Debug( LDAP_DEBUG_ANY, "%s %s.\n",
op->o_log_prefix, buf, 0 );
}
/*
* FIXME: need to rewrite "match" (need rwinfo)
*/
switch ( rs->sr_err ) {
default:
err = rs->sr_err;
if ( xtext != NULL ) {
if ( text ) {
ldap_memfree( text );
}
text = xtext;
xtext = NULL;
}
if ( xmatched != NULL ) {
if ( matched ) {
ldap_memfree( matched );
}
matched = xmatched;
xmatched = NULL;
}
break;
}
if ( xtext ) {
ldap_memfree( xtext );
}
if ( xmatched ) {
ldap_memfree( xmatched );
}
}
if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
meta_back_quarantine( op, rs, i );
}
}
if ( err != LDAP_SUCCESS ) {
rs->sr_err = err;
}
}
if ( matched != NULL ) {
struct berval dn, pdn;
ber_str2bv( matched, 0, 0, &dn );
if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
ldap_memfree( matched );
matched_ctx = op->o_tmpmemctx;
matched = pdn.bv_val;
}
rs->sr_matched = matched;
}
if ( op->o_conn &&
( ( sendok & LDAP_BACK_SENDOK )
|| ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
{
send_ldap_result( op, rs );
}
if ( matched ) {
op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
}
if ( text ) {
ldap_memfree( text );
}
if ( rs->sr_ref ) {
op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
rs->sr_ref = NULL;
}
if ( refs ) {
ber_memvfree( (void **)refs );
}
if ( ctrls ) {
assert( rs->sr_ctrls != NULL );
ldap_controls_free( ctrls );
}
rs->sr_text = save_text;
rs->sr_matched = save_matched;
rs->sr_ref = save_ref;
rs->sr_ctrls = save_ctrls;
return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
}
/*
* meta_back_proxy_authz_cred()
*
* prepares credentials & method for meta_back_proxy_authz_bind();
* or, if method is SASL, performs the SASL bind directly.
*/
int
meta_back_proxy_authz_cred(
metaconn_t *mc,
int candidate,
Operation *op,
SlapReply *rs,
ldap_back_send_t sendok,
struct berval *binddn,
struct berval *bindcred,
int *method )
{
metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
metatarget_t *mt = mi->mi_targets[ candidate ];
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
struct berval ndn;
int dobind = 0;
/* don't proxyAuthz if protocol is not LDAPv3 */
switch ( mt->mt_version ) {
case LDAP_VERSION3:
break;
case 0:
if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
break;
}
/* fall thru */
default:
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
if ( sendok & LDAP_BACK_SENDERR ) {
send_ldap_result( op, rs );
}
LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
goto done;
}
if ( op->o_tag == LDAP_REQ_BIND ) {
ndn = op->o_req_ndn;
} else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
ndn = op->o_conn->c_ndn;
} else {
ndn = op->o_ndn;
}
/*
* FIXME: we need to let clients use proxyAuthz
* otherwise we cannot do symmetric pools of servers;
* we have to live with the fact that a user can
* authorize itself as any ID that is allowed
* by the authzTo directive of the "proxyauthzdn".
*/
/*
* NOTE: current Proxy Authorization specification
* and implementation do not allow proxy authorization
* control to be provided with Bind requests
*/
/*
* if no bind took place yet, but the connection is bound
* and the "proxyauthzdn" is set, then bind as
* "proxyauthzdn" and explicitly add the proxyAuthz
* control to every operation with the dn bound
* to the connection as control value.
*/
/* bind as proxyauthzdn only if no idassert mode
* is requested, or if the client's identity
* is authorized */
switch ( mt->mt_idassert_mode ) {
case LDAP_BACK_IDASSERT_LEGACY:
if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
{
*binddn = mt->mt_idassert_authcDN;
*bindcred = mt->mt_idassert_passwd;
dobind = 1;
}
}
break;
default:
/* NOTE: rootdn can always idassert */
if ( BER_BVISNULL( &ndn )
&& mt->mt_idassert_authz == NULL
&& !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
{
if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
if ( sendok & LDAP_BACK_SENDERR ) {
send_ldap_result( op, rs );
}
LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
goto done;
}
rs->sr_err = LDAP_SUCCESS;
*binddn = slap_empty_bv;
*bindcred = slap_empty_bv;
break;
} else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
struct berval authcDN;
if ( BER_BVISNULL( &ndn ) ) {
authcDN = slap_empty_bv;
} else {
authcDN = ndn;
}
rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
&authcDN, &authcDN );
if ( rs->sr_err != LDAP_SUCCESS ) {
if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
if ( sendok & LDAP_BACK_SENDERR ) {
send_ldap_result( op, rs );
}
LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
goto done;
}
rs->sr_err = LDAP_SUCCESS;
*binddn = slap_empty_bv;
*bindcred = slap_empty_bv;
break;
}
}
*binddn = mt->mt_idassert_authcDN;
*bindcred = mt->mt_idassert_passwd;
dobind = 1;
break;
}
if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
#ifdef HAVE_CYRUS_SASL
void *defaults = NULL;
struct berval authzID = BER_BVNULL;
int freeauthz = 0;
/* if SASL supports native authz, prepare for it */
if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
{
switch ( mt->mt_idassert_mode ) {
case LDAP_BACK_IDASSERT_OTHERID:
case LDAP_BACK_IDASSERT_OTHERDN:
authzID = mt->mt_idassert_authzID;
break;
case LDAP_BACK_IDASSERT_ANONYMOUS:
BER_BVSTR( &authzID, "dn:" );
break;
case LDAP_BACK_IDASSERT_SELF:
if ( BER_BVISNULL( &ndn ) ) {
/* connection is not authc'd, so don't idassert */
BER_BVSTR( &authzID, "dn:" );
break;
}
authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
ndn.bv_val, ndn.bv_len + 1 );
freeauthz = 1;
break;
default:
break;
}
}
if ( mt->mt_idassert_secprops != NULL ) {
rs->sr_err = ldap_set_option( msc->msc_ld,
LDAP_OPT_X_SASL_SECPROPS,
(void *)mt->mt_idassert_secprops );
if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
rs->sr_err = LDAP_OTHER;
if ( sendok & LDAP_BACK_SENDERR ) {
send_ldap_result( op, rs );
}
LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
goto done;
}
}
defaults = lutil_sasl_defaults( msc->msc_ld,
mt->mt_idassert_sasl_mech.bv_val,
mt->mt_idassert_sasl_realm.bv_val,
mt->mt_idassert_authcID.bv_val,
mt->mt_idassert_passwd.bv_val,
authzID.bv_val );
rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
LDAP_SASL_QUIET, lutil_sasl_interact,
defaults );
rs->sr_err = slap_map_api2result( rs );
if ( rs->sr_err != LDAP_SUCCESS ) {
LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
if ( sendok & LDAP_BACK_SENDERR ) {
send_ldap_result( op, rs );
}
} else {
LDAP_BACK_CONN_ISBOUND_SET( msc );
}
lutil_sasl_freedefs( defaults );
if ( freeauthz ) {
slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
}
goto done;
#endif /* HAVE_CYRUS_SASL */
}
*method = mt->mt_idassert_authmethod;
switch ( mt->mt_idassert_authmethod ) {
case LDAP_AUTH_NONE:
BER_BVSTR( binddn, "" );
BER_BVSTR( bindcred, "" );
/* fallthru */
case LDAP_AUTH_SIMPLE:
break;
default:
/* unsupported! */
LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
if ( sendok & LDAP_BACK_SENDERR ) {
send_ldap_result( op, rs );
}
break;
}
done:;
return rs->sr_err;
}
static int
meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
{
metainfo_t *mi = (metainfo_t *)op->o_bd->be_private;
metatarget_t *mt = mi->mi_targets[ candidate ];
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
struct berval binddn = BER_BVC( "" ),
cred = BER_BVC( "" );
int method = LDAP_AUTH_NONE,
rc;
rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
int msgid;
switch ( method ) {
case LDAP_AUTH_NONE:
case LDAP_AUTH_SIMPLE:
rs->sr_err = ldap_sasl_bind( msc->msc_ld,
binddn.bv_val, LDAP_SASL_SIMPLE,
&cred, NULL, NULL, &msgid );
rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
if ( rc == LDAP_SUCCESS ) {
/* set rebind stuff in case of successful proxyAuthz bind,
* so that referral chasing is attempted using the right
* identity */
LDAP_BACK_CONN_ISBOUND_SET( msc );
ber_bvreplace( &msc->msc_bound_ndn, &binddn );
if ( LDAP_BACK_SAVECRED( mi ) ) {
if ( !BER_BVISNULL( &msc->msc_cred ) ) {
memset( msc->msc_cred.bv_val, 0,
msc->msc_cred.bv_len );
}
ber_bvreplace( &msc->msc_cred, &cred );
ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
}
}
break;
default:
assert( 0 );
break;
}
}
return LDAP_BACK_CONN_ISBOUND( msc );
}
|
