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openldap/servers/slapd/back-meta/bind.c

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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1999-2005 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"
static LDAP_REBIND_PROC meta_back_rebind;
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, "meta_back_bind: dn: %s.\n%s%s",
op->o_req_dn.bv_val, "", "" );
if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
isroot = 1;
ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
}
/* 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_DONTSEND );
if ( !mc ) {
Debug( LDAP_DEBUG_ANY,
"meta_back_bind: no target "
"for dn \"%s\" (%d: %s).\n",
op->o_req_dn.bv_val, rs->sr_err,
rs->sr_text ? rs->sr_text : "" );
/* 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_auth_target = META_BOUND_NONE;
for ( i = 0; i < mi->mi_ntargets; i++ ) {
int lerr;
Operation op2 = *op;
/*
* Skip non-candidates
*/
if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
continue;
}
if ( gotit == 0 ) {
gotit = 1;
} else if ( isroot == 0 ) {
/*
* A bind operation is expected to have
* ONE CANDIDATE ONLY!
*/
Debug( LDAP_DEBUG_ANY,
"==>meta_back_bind: more than one"
" candidate is trying to bind...\n",
0, 0, 0 );
}
if ( isroot && !BER_BVISNULL( &mi->mi_targets[ i ].mt_pseudorootdn ) )
{
op2.o_req_dn = mi->mi_targets[ i ].mt_pseudorootdn;
op2.o_req_ndn = mi->mi_targets[ i ].mt_pseudorootdn;
op2.orb_cred = mi->mi_targets[ i ].mt_pseudorootpw;
op2.orb_method = LDAP_AUTH_SIMPLE;
}
lerr = meta_back_single_bind( &op2, rs, mc, i );
if ( lerr != LDAP_SUCCESS ) {
rs->sr_err = lerr;
candidates[ i ].sr_tag = META_NOT_CANDIDATE;
} else {
rc = LDAP_SUCCESS;
}
}
if ( isroot ) {
mc->mc_auth_target = META_BOUND_ALL;
}
meta_back_release_conn( op, 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 succeedes, 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;
}
rs->sr_err = slap_map_api2result( rs );
send_ldap_result( op, rs );
return rs->sr_err;
}
return LDAP_SUCCESS;
}
/*
* 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;
dncookie dc;
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
int msgid,
rebinding = 0;
/*
* Rewrite the bind dn if needed
*/
dc.target = &mi->mi_targets[ candidate ];
dc.conn = op->o_conn;
dc.rs = rs;
dc.ctx = "bindDN";
if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
send_ldap_result( op, rs );
return -1;
}
/* 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 be check if at least some of the op->o_ctrls
* can/should be passed? */
rebind:;
rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
LDAP_SASL_SIMPLE, &op->orb_cred,
op->o_ctrls, NULL, &msgid );
if ( rs->sr_err == LDAP_SUCCESS ) {
LDAPMessage *res;
struct timeval tv;
int rc;
int nretries = mt->mt_nretries;
/*
* handle response!!!
*/
retry:;
tv.tv_sec = 0;
tv.tv_usec = META_BIND_TIMEOUT;
switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
case 0:
Debug( LDAP_DEBUG_ANY,
"%s meta_back_single_bind: "
"ldap_result=0 nretries=%d%s\n",
op->o_log_prefix, nretries,
rebinding ? " rebinding" : "" );
if ( nretries != META_RETRY_NEVER ) {
ldap_pvt_thread_yield();
if ( nretries > 0 ) {
nretries--;
}
goto retry;
}
rs->sr_err = LDAP_BUSY;
if ( rebinding ) {
ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
break;
}
/* FIXME: some times the request times out
* while the other party is not willing to
* send a response any more. Give it a second
* chance with a freshly bound connection */
rebinding = 1;
nretries = mt->mt_nretries;
/* fallthru */
case -1:
ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
&rs->sr_err );
if ( rebinding ) {
ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
}
Debug( LDAP_DEBUG_ANY,
"### %s meta_back_single_bind: "
"err=%d nretries=%d\n",
op->o_log_prefix, rs->sr_err, nretries );
rc = slap_map_api2result( rs );
if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
if ( mc->mc_refcnt == 1 ) {
ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
msc->msc_ld = NULL;
msc->msc_bound = 0;
( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
/* mc here must be the regular mc,
* reset and ready for init */
rc = meta_back_init_one_conn( op, rs,
mt, msc, LDAP_BACK_DONTSEND );
} else {
/* can't do anything about it */
rc = 0;
}
ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
if ( rc ) {
if ( nretries > 0 ) {
nretries--;
}
ldap_pvt_thread_yield();
goto rebind;
}
}
break;
default:
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;
}
}
if ( rs->sr_err != LDAP_SUCCESS ) {
rs->sr_err = slap_map_api2result( rs );
goto return_results;
}
ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
msc->msc_bound = META_BOUND;
mc->mc_auth_target = candidate;
if ( LDAP_BACK_SAVECRED( mi ) ) {
ber_bvreplace( &msc->msc_cred, &op->orb_cred );
ldap_set_rebind_proc( msc->msc_ld, meta_back_rebind, msc );
}
if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
&& op->o_req_ndn.bv_len != 0 )
{
( 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 );
}
return rs->sr_err;
}
/*
* meta_back_single_dobind
*/
int
meta_back_single_dobind(
Operation *op,
SlapReply *rs,
metaconn_t *mc,
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 ];
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
int rc;
struct berval cred = BER_BVC( "" );
int msgid,
rebinding = 0,
save_nretries = nretries;
/*
* Otherwise an anonymous bind is performed
* (note: if the target was already bound, the anonymous
* bind clears the previous bind).
*/
if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
ber_memfree( 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 );
ber_memfree( msc->msc_cred.bv_val );
BER_BVZERO( &msc->msc_cred );
}
/* FIXME: should we check if at least some of the op->o_ctrls
* can/should be passed? */
rebind:;
rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
NULL, NULL, &msgid );
if ( rc == LDAP_SUCCESS ) {
LDAPMessage *res;
struct timeval tv;
/*
* handle response!!!
*/
retry:;
tv.tv_sec = 0;
tv.tv_usec = META_BIND_TIMEOUT;
switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
case 0:
Debug( LDAP_DEBUG_ANY,
"%s meta_back_single_dobind: "
"ldap_result=0 nretries=%d%s\n",
op->o_log_prefix, nretries,
rebinding ? " rebinding" : "" );
if ( nretries != META_RETRY_NEVER ) {
ldap_pvt_thread_yield();
if ( nretries > 0 ) {
nretries--;
}
goto retry;
}
rc = LDAP_BUSY;
if ( rebinding ) {
ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
break;
}
/* FIXME: some times the request times out
* while the other party is not willing to
* send a response any more. Give it a second
* chance with a freshly bound connection */
rebinding = 1;
nretries = save_nretries;
/* fallthru */
case -1:
ldap_get_option( msc->msc_ld,
LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
if ( rebinding ) {
ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
}
Debug( LDAP_DEBUG_ANY,
"### %s meta_back_single_dobind: "
"err=%d nretries=%d\n",
op->o_log_prefix, rs->sr_err, nretries );
rc = slap_map_api2result( rs );
if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
if ( dolock ) {
ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
}
if ( mc->mc_refcnt == 1 ) {
ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
msc->msc_ld = NULL;
msc->msc_bound = 0;
( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
/* mc here must be the regular mc,
* reset and ready for init */
rc = meta_back_init_one_conn( op, rs,
mt, msc, LDAP_BACK_DONTSEND );
} else {
/* can't do anything about it */
rc = LDAP_UNAVAILABLE;
}
if ( dolock ) {
ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
}
if ( rc == LDAP_SUCCESS ) {
ldap_pvt_thread_yield();
if ( nretries > 0 ) {
nretries--;
}
goto rebind;
}
}
break;
default:
rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
NULL, NULL, NULL, NULL, 1 );
if ( rc == LDAP_SUCCESS ) {
rc = slap_map_api2result( rs );
}
break;
}
} else {
rc = slap_map_api2result( rs );
}
rs->sr_err = rc;
if ( rc != LDAP_SUCCESS && ( sendok & LDAP_BACK_SENDERR ) ) {
send_ldap_result( op, rs );
}
return rc;
}
/*
* 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, mc->mc_conn->c_connid,
isroot ? " (isroot)" : "" );
ldap_pvt_thread_mutex_lock( &mc->mc_mutex );
/*
* all the targets are bound as pseudoroot
*/
if ( mc->mc_auth_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 ( candidates[ i ].sr_tag != META_CANDIDATE ) {
continue;
}
assert( msc->msc_ld != NULL );
/*
* If the target is already bound it is skipped
*/
if ( msc->msc_bound == META_BOUND && mc->mc_auth_target == i ) {
++bound;
Debug( LDAP_DEBUG_TRACE, "%s meta_back_dobind[%d]: "
"authcTarget\n",
op->o_log_prefix, i, 0 );
continue;
}
if ( isroot && !BER_BVISNULL( &mi->mi_targets[ i ].mt_pseudorootdn ) )
{
Operation op2 = *op;
op2.o_tag = LDAP_REQ_BIND;
op2.o_req_dn = mi->mi_targets[ i ].mt_pseudorootdn;
op2.o_req_ndn = mi->mi_targets[ i ].mt_pseudorootdn;
op2.orb_cred = mi->mi_targets[ i ].mt_pseudorootpw;
op2.orb_method = LDAP_AUTH_SIMPLE;
rc = meta_back_single_bind( &op2, rs, mc, i );
} else {
rc = meta_back_single_dobind( op, rs, mc, i,
LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
}
if ( rc != LDAP_SUCCESS ) {
rs->sr_err = slap_map_api2result( rs );
Debug( LDAP_DEBUG_ANY, "%s meta_back_dobind[%d]: "
"(anonymous) err=%d\n",
op->o_log_prefix, i, rc );
/*
* 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
*/
candidates[ i ].sr_tag = META_NOT_CANDIDATE;
continue;
} /* else */
Debug( LDAP_DEBUG_TRACE, "%s meta_back_dobind[%d]: "
"(anonymous)\n",
op->o_log_prefix, i, 0 );
msc->msc_bound = META_ANONYMOUS;
++bound;
}
done:;
ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
Debug( LDAP_DEBUG_TRACE,
"%s meta_back_dobind: conn=%ld bound=%d\n",
op->o_log_prefix, mc->mc_conn->c_connid, bound );
if ( bound == 0 ) {
meta_back_release_conn( op, mc );
if ( sendok & LDAP_BACK_SENDERR ) {
if ( rs->sr_err == LDAP_SUCCESS ) {
rs->sr_err = LDAP_BUSY;
}
send_ldap_result( op, rs );
}
}
return( bound > 0 );
}
/*
* meta_back_rebind
*
* This is a callback used for chasing referrals using the same
* credentials as the original user on this session.
*/
static int
meta_back_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 );
}
/*
* FIXME: error return must be handled in a cleaner way ...
*/
int
meta_back_op_result(
metaconn_t *mc,
Operation *op,
SlapReply *rs,
int candidate )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
int i,
rerr = LDAP_SUCCESS;
char *rmsg = NULL;
char *rmatch = NULL;
int free_rmsg = 0,
free_rmatch = 0;
if ( candidate != META_TARGET_NONE ) {
metasingleconn_t *msc = &mc->mc_conns[ candidate ];
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, &rmsg );
ldap_get_option( msc->msc_ld,
LDAP_OPT_MATCHED_DN, &rmatch );
rerr = rs->sr_err = slap_map_api2result( rs );
if ( rmsg ) {
free_rmsg = 1;
}
if ( rmatch ) {
free_rmatch = 1;
}
Debug(LDAP_DEBUG_ANY,
"==> meta_back_op_result: target"
" <%d> sending msg \"%s\""
" (matched \"%s\")\n",
candidate, ( rmsg ? rmsg : "" ),
( rmatch ? rmatch : "" ) );
}
} else {
for ( i = 0; i < mi->mi_ntargets; i++ ) {
metasingleconn_t *msc = &mc->mc_conns[ i ];
char *msg = NULL;
char *match = 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, &msg );
ldap_get_option( msc->msc_ld,
LDAP_OPT_MATCHED_DN, &match );
rs->sr_err = slap_map_api2result( rs );
Debug(LDAP_DEBUG_ANY,
"==> meta_back_op_result: target"
" <%d> sending msg \"%s\""
" (matched \"%s\")\n",
i, ( msg ? msg : "" ),
( match ? match : "" ) );
/*
* FIXME: need to rewrite "match" (need rwinfo)
*/
switch ( rs->sr_err ) {
default:
rerr = rs->sr_err;
if ( rmsg ) {
ber_memfree( rmsg );
}
rmsg = msg;
free_rmsg = 1;
msg = NULL;
if ( rmatch ) {
ber_memfree( rmatch );
}
rmatch = match;
free_rmatch = 1;
match = NULL;
break;
}
/* better test the pointers before freeing? */
if ( match ) {
free( match );
}
if ( msg ) {
free( msg );
}
}
}
}
rs->sr_err = rerr;
rs->sr_text = rmsg;
rs->sr_matched = rmatch;
send_ldap_result( op, rs );
if ( free_rmsg ) {
ber_memfree( rmsg );
}
if ( free_rmatch ) {
ber_memfree( rmatch );
}
rs->sr_text = NULL;
rs->sr_matched = NULL;
return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
}
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