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openldap/servers/slapd/back-asyncmeta/bind.c
Quanah Gibson-Mount f6ad222e41 Happy New Year!
2020-01-09 16:50:21 +00:00

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/* bind.c - bind request handler functions for binding
* to remote targets for back-asyncmeta */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2016-2020 The OpenLDAP Foundation.
* Portions Copyright 2016 Symas Corporation.
* 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 developed by Symas Corporation
* based on back-meta module for inclusion in OpenLDAP Software.
* This work was sponsored by Ericsson. */
#include "portable.h"
#include <stdio.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include "slap.h"
#include "../../../libraries/libldap/ldap-int.h"
#define AVL_INTERNAL
#include "../back-ldap/back-ldap.h"
#include "back-asyncmeta.h"
#include "lutil_ldap.h"
#define LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ "2.16.840.1.113730.3.4.12"
static int
asyncmeta_proxy_authz_bind(
a_metaconn_t *mc,
int candidate,
Operation *op,
SlapReply *rs,
ldap_back_send_t sendok,
int dolock );
static int
asyncmeta_single_bind(
Operation *op,
SlapReply *rs,
a_metaconn_t *mc,
int candidate );
int
asyncmeta_back_bind( Operation *op, SlapReply *rs )
{
a_metainfo_t *mi = ( a_metainfo_t * )op->o_bd->be_private;
a_metaconn_t *mc = NULL;
int rc = LDAP_OTHER,
i,
gotit = 0,
isroot = 0;
SlapReply *candidates;
candidates = op->o_tmpcalloc(mi->mi_ntargets, sizeof(SlapReply),op->o_tmpmemctx);
rs->sr_err = LDAP_SUCCESS;
Debug( LDAP_DEBUG_ARGS, "%s asyncmeta_back_bind: dn=\"%s\".\n",
op->o_log_prefix, op->o_req_dn.bv_val );
/* the test on the bind method should be superfluous */
switch ( be_rootdn_bind( op, rs ) ) {
case LDAP_SUCCESS:
if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
/* frontend will return success */
return rs->sr_err;
}
isroot = 1;
/* fallthru */
case SLAP_CB_CONTINUE:
break;
default:
/* be_rootdn_bind() sent result */
return rs->sr_err;
}
/* we need asyncmeta_getconn() not send result even on error,
* because we want to intercept the error and make it
* invalidCredentials */
mc = asyncmeta_getconn( op, rs, candidates, NULL, LDAP_BACK_BIND_DONTSEND, 1 );
if ( !mc ) {
Debug(LDAP_DEBUG_ANY,
"%s asyncmeta_back_bind: no target " "for dn \"%s\" (%d%s%s).\n",
op->o_log_prefix, op->o_req_dn.bv_val,
rs->sr_err, rs->sr_text ? ". " : "",
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_authz_target = META_BOUND_NONE;
for ( i = 0; i < mi->mi_ntargets; i++ ) {
a_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 ) {
/*
* A bind operation is expected to have
* ONE CANDIDATE ONLY!
*/
Debug( LDAP_DEBUG_ANY,
"### %s asyncmeta_back_bind: more than one"
" candidate selected...\n",
op->o_log_prefix );
}
if ( isroot ) {
if ( mt->mt_idassert_authmethod == LDAP_AUTH_NONE
|| BER_BVISNULL( &mt->mt_idassert_authcDN ) )
{
a_metasingleconn_t *msc = &mc->mc_conns[ i ];
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)asyncmeta_proxy_authz_bind( mc, i, op, rs, LDAP_BACK_DONTSEND, 1 );
lerr = rs->sr_err;
} else {
lerr = asyncmeta_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;
}
}
if ( mc != NULL ) {
for ( i = 0; i < mi->mi_ntargets; i++ ) {
a_metasingleconn_t *msc = &mc->mc_conns[ i ];
if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
ch_free( msc->msc_bound_ndn.bv_val );
}
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 );
}
}
asyncmeta_back_conn_free( 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
asyncmeta_bind_op_result(
Operation *op,
SlapReply *rs,
a_metaconn_t *mc,
int candidate,
int msgid,
ldap_back_send_t sendok,
int dolock )
{
a_metainfo_t *mi = mc->mc_info;
a_metatarget_t *mt = mi->mi_targets[ candidate ];
a_metasingleconn_t *msc = &mc->mc_conns[ candidate ];
LDAPMessage *res;
struct timeval tv;
int rc;
int nretries = mt->mt_nretries;
Debug( LDAP_DEBUG_TRACE,
">>> %s asyncmeta_bind_op_result[%d]\n",
op->o_log_prefix, candidate );
/* make sure this is clean */
assert( rs->sr_ctrls == NULL );
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;
}
}
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 */
assert( LDAP_BACK_CONN_BINDING( msc ) );
#ifdef DEBUG_205
Debug( LDAP_DEBUG_ANY, "### %s asyncmeta_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
op->o_log_prefix, candidate, (void *)msc->msc_ld );
#endif /* DEBUG_205 */
rs->sr_err = timeout_err;
rs->sr_text = timeout_text;
break;
case -1:
ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
&rs->sr_err );
Debug( LDAP_DEBUG_ANY,
"### %s asyncmeta_bind_op_result[%d]: err=%d (%s) nretries=%d.\n",
op->o_log_prefix, candidate, rs->sr_err,
ldap_err2string(rs->sr_err), nretries );
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;
}
rs->sr_err = slap_map_api2result( rs );
break;
}
}
rs->sr_err = slap_map_api2result( rs );
Debug( LDAP_DEBUG_TRACE,
"<<< %s asyncmeta_bind_op_result[%d] err=%d\n",
op->o_log_prefix, candidate, rs->sr_err );
return rs->sr_err;
}
/*
* asyncmeta_single_bind
*
* attempts to perform a bind with creds
*/
static int
asyncmeta_single_bind(
Operation *op,
SlapReply *rs,
a_metaconn_t *mc,
int candidate )
{
a_metainfo_t *mi = mc->mc_info;
a_metatarget_t *mt = mi->mi_targets[ candidate ];
struct berval mdn = BER_BVNULL;
a_metasingleconn_t *msc = &mc->mc_conns[ candidate ];
int msgid;
a_dncookie dc;
struct berval save_o_dn;
int save_o_do_not_cache;
LDAPControl **ctrls = NULL;
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.op = op;
dc.target = mt;
dc.memctx = op->o_tmpmemctx;
dc.to_from = MASSAGE_REQ;
asyncmeta_dn_massage( &dc, &op->o_req_dn, &mdn );
/* don't add proxyAuthz; set the bindDN */
save_o_dn = op->o_dn;
save_o_do_not_cache = op->o_do_not_cache;
op->o_do_not_cache = 1;
op->o_dn = op->o_req_dn;
ctrls = op->o_ctrls;
rs->sr_err = asyncmeta_controls_add( op, rs, mc, candidate, be_isroot(op), &ctrls );
op->o_dn = save_o_dn;
op->o_do_not_cache = save_o_do_not_cache;
if ( rs->sr_err != LDAP_SUCCESS ) {
goto return_results;
}
/* 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? */
for (;;) {
rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
LDAP_SASL_SIMPLE, &op->orb_cred,
ctrls, NULL, &msgid );
if ( rs->sr_err != LDAP_X_CONNECTING ) {
break;
}
ldap_pvt_thread_yield();
}
mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
asyncmeta_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND, 1 );
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 ) {
asyncmeta_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR, 1 );
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 ( META_BACK_TGT_SAVECRED( mt ) ) {
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 )asyncmeta_dncache_update_entry( &mi->mi_cache,
&op->o_req_ndn, candidate );
}
return_results:;
if ( mdn.bv_val != op->o_req_dn.bv_val ) {
op->o_tmpfree( mdn.bv_val, op->o_tmpmemctx );
}
if ( META_BACK_TGT_QUARANTINE( mt ) ) {
asyncmeta_quarantine( op, mi, rs, candidate );
}
ldap_unbind_ext( msc->msc_ld, NULL, NULL );
msc->msc_ld = NULL;
ldap_ld_free( msc->msc_ldr, 0, NULL, NULL );
msc->msc_ldr = NULL;
return rs->sr_err;
}
/*
* asyncmeta_back_default_rebind
*
* This is a callback used for chasing referrals using the same
* credentials as the original user on this session.
*/
int
asyncmeta_back_default_rebind(
LDAP *ld,
LDAP_CONST char *url,
ber_tag_t request,
ber_int_t msgid,
void *params )
{
a_metasingleconn_t *msc = ( a_metasingleconn_t * )params;
return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
LDAP_SASL_SIMPLE, &msc->msc_cred,
NULL, NULL, NULL );
}
/*
* meta_back_default_urllist
*
* This is a callback used for mucking with the urllist
*/
int
asyncmeta_back_default_urllist(
LDAP *ld,
LDAPURLDesc **urllist,
LDAPURLDesc **url,
void *params )
{
a_metatarget_t *mt = (a_metatarget_t *)params;
LDAPURLDesc **urltail;
if ( urllist == url ) {
return LDAP_SUCCESS;
}
for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
/* count */ ;
*urltail = *urllist;
*urllist = *url;
*url = NULL;
ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
if ( mt->mt_uri ) {
ch_free( mt->mt_uri );
}
ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
return LDAP_SUCCESS;
}
int
asyncmeta_back_cancel(
a_metaconn_t *mc,
Operation *op,
ber_int_t msgid,
int candidate )
{
a_metainfo_t *mi = mc->mc_info;
a_metatarget_t *mt = mi->mi_targets[ candidate ];
a_metasingleconn_t *msc = &mc->mc_conns[ candidate ];
int rc = LDAP_OTHER;
struct timeval tv = { 0, 0 };
ber_socket_t s;
Debug( LDAP_DEBUG_TRACE, ">>> %s asyncmeta_back_cancel[%d] msgid=%d\n",
op->o_log_prefix, candidate, msgid );
if (!( LDAP_BACK_CONN_ISBOUND( msc )
|| LDAP_BACK_CONN_ISANON( msc )) || msc->msc_ld == NULL ) {
Debug( LDAP_DEBUG_TRACE, ">>> %s asyncmeta_back_cancel[%d] msgid=%d\n already reset",
op->o_log_prefix, candidate, msgid );
return LDAP_SUCCESS;
}
ldap_get_option( msc->msc_ld, LDAP_OPT_DESC, &s );
if (s < 0) {
return rc;
}
rc = ldap_int_poll( msc->msc_ld, s, &tv, 1);
if (rc < 0) {
rc = LDAP_SERVER_DOWN;
return rc;
}
/* default behavior */
if ( META_BACK_TGT_ABANDON( mt ) ) {
rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
} else if ( META_BACK_TGT_IGNORE( mt ) ) {
rc = ldap_pvt_discard( msc->msc_ld, msgid );
} 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 asyncmeta_back_cancel[%d] err=%d\n",
op->o_log_prefix, candidate, rc );
return rc;
}
/*
* asyncmeta_back_proxy_authz_cred()
*
* prepares credentials & method for meta_back_proxy_authz_bind();
* or, if method is SASL, performs the SASL bind directly.
*/
int
asyncmeta_back_proxy_authz_cred(
a_metaconn_t *mc,
int candidate,
Operation *op,
SlapReply *rs,
ldap_back_send_t sendok,
struct berval *binddn,
struct berval *bindcred,
int *method )
{
a_metainfo_t *mi = mc->mc_info;
a_metatarget_t *mt = mi->mi_targets[ candidate ];
a_metasingleconn_t *msc = &mc->mc_conns[ candidate ];
struct berval ndn;
int dobind = 0;
struct timeval old_tv = {0, 0};
struct timeval bind_tv = { mt->mt_timeout[ SLAP_OP_BIND ], 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;
}
rs->sr_err = LDAP_SUCCESS;
/*
* 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;
}
}
ldap_get_option( msc->msc_ld, LDAP_OPT_TIMEOUT, (void *)&old_tv);
if (mt->mt_timeout[ SLAP_OP_BIND ] > 0 ) {
rs->sr_err = ldap_set_option( msc->msc_ld,
LDAP_OPT_TIMEOUT,
(void *)&bind_tv );
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 );
if ( defaults == NULL ) {
rs->sr_err = LDAP_OTHER;
LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
if ( sendok & LDAP_BACK_SENDERR ) {
send_ldap_result( op, rs );
}
goto done;
}
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 );
/* restore the old timeout just in case */
ldap_set_option( msc->msc_ld, LDAP_OPT_TIMEOUT, (void *)&old_tv );
rs->sr_err = slap_map_api2result( rs );
if ( rs->sr_err != LDAP_SUCCESS ) {
if ( LogTest( asyncmeta_debug ) ) {
char time_buf[ SLAP_TEXT_BUFLEN ];
asyncmeta_get_timestamp(time_buf);
Debug( asyncmeta_debug, "[%s] asyncmeta_back_proxy_authz_cred failed bind msc: %p\n",
time_buf, msc );
}
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:;
if ( !BER_BVISEMPTY( binddn ) ) {
LDAP_BACK_CONN_ISIDASSERT_SET( msc );
}
return rs->sr_err;
}
static int
asyncmeta_proxy_authz_bind(
a_metaconn_t *mc,
int candidate,
Operation *op,
SlapReply *rs,
ldap_back_send_t sendok,
int dolock )
{
a_metainfo_t *mi = mc->mc_info;
a_metatarget_t *mt = mi->mi_targets[ candidate ];
a_metasingleconn_t *msc = &mc->mc_conns[ candidate ];
struct berval binddn = BER_BVC( "" ),
cred = BER_BVC( "" );
int method = LDAP_AUTH_NONE,
rc;
rc = asyncmeta_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:
for (;;) {
rs->sr_err = ldap_sasl_bind( msc->msc_ld,
binddn.bv_val, LDAP_SASL_SIMPLE,
&cred, NULL, NULL, &msgid );
if ( rs->sr_err != LDAP_X_CONNECTING ) {
break;
}
ldap_pvt_thread_yield();
}
rc = asyncmeta_bind_op_result( op, rs, mc, candidate, msgid, sendok, dolock );
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 ( META_BACK_TGT_SAVECRED( mt ) ) {
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 );
}
static int
asyncmeta_back_proxy_authz_ctrl(Operation *op,
SlapReply *rs,
struct berval *bound_ndn,
int version,
int isroot,
slap_idassert_t *si,
LDAPControl *ctrl )
{
slap_idassert_mode_t mode;
struct berval assertedID,
ndn;
rs->sr_err = SLAP_CB_CONTINUE;
/* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
* but if it is not set this test fails. We need a different
* means to detect if idassert is enabled */
if ( ( BER_BVISNULL( &si->si_bc.sb_authcId ) || BER_BVISEMPTY( &si->si_bc.sb_authcId ) )
&& ( BER_BVISNULL( &si->si_bc.sb_binddn ) || BER_BVISEMPTY( &si->si_bc.sb_binddn ) )
&& BER_BVISNULL( &si->si_bc.sb_saslmech ) )
{
goto done;
}
if ( !op->o_conn || op->o_do_not_cache || ( isroot ) ) {
goto done;
}
if ( op->o_tag == LDAP_REQ_BIND ) {
ndn = op->o_req_ndn;
#if 0
} else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
ndn = op->o_conn->c_ndn;
#endif
} else {
ndn = op->o_ndn;
}
if ( si->si_mode == LDAP_BACK_IDASSERT_LEGACY ) {
if ( op->o_proxy_authz ) {
/*
* FIXME: we do not want to perform proxyAuthz
* on behalf of the client, because this would
* be performed with "proxyauthzdn" privileges.
*
* This might actually be too strict, since
* the "proxyauthzdn" authzTo, and each entry's
* authzFrom attributes may be crafted
* to avoid unwanted proxyAuthz to take place.
*/
#if 0
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
rs->sr_text = "proxyAuthz not allowed within namingContext";
#endif
goto done;
}
if ( !BER_BVISNULL( bound_ndn ) ) {
goto done;
}
if ( BER_BVISNULL( &ndn ) ) {
goto done;
}
if ( BER_BVISNULL( &si->si_bc.sb_binddn ) ) {
goto done;
}
} else if ( si->si_bc.sb_method == LDAP_AUTH_SASL ) {
if ( ( si->si_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
{
/* already asserted in SASL via native authz */
goto done;
}
} else if ( si->si_authz && !isroot ) {
int rc;
struct berval authcDN;
if ( BER_BVISNULL( &ndn ) ) {
authcDN = slap_empty_bv;
} else {
authcDN = ndn;
}
rc = slap_sasl_matches( op, si->si_authz,
&authcDN, &authcDN );
if ( rc != LDAP_SUCCESS ) {
if ( si->si_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
/* ndn is not authorized
* to use idassert */
rs->sr_err = rc;
}
goto done;
}
}
if ( op->o_proxy_authz ) {
/*
* FIXME: we can:
* 1) ignore the already set proxyAuthz control
* 2) leave it in place, and don't set ours
* 3) add both
* 4) reject the operation
*
* option (4) is very drastic
* option (3) will make the remote server reject
* the operation, thus being equivalent to (4)
* option (2) will likely break the idassert
* assumptions, so we cannot accept it;
* option (1) means that we are contradicting
* the client's reques.
*
* I think (4) is the only correct choice.
*/
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
rs->sr_text = "proxyAuthz not allowed within namingContext";
}
if ( op->o_is_auth_check ) {
mode = LDAP_BACK_IDASSERT_NOASSERT;
} else {
mode = si->si_mode;
}
switch ( mode ) {
case LDAP_BACK_IDASSERT_LEGACY:
/* original behavior:
* assert the client's identity */
case LDAP_BACK_IDASSERT_SELF:
assertedID = ndn;
break;
case LDAP_BACK_IDASSERT_ANONYMOUS:
/* assert "anonymous" */
assertedID = slap_empty_bv;
break;
case LDAP_BACK_IDASSERT_NOASSERT:
/* don't assert; bind as proxyauthzdn */
goto done;
case LDAP_BACK_IDASSERT_OTHERID:
case LDAP_BACK_IDASSERT_OTHERDN:
/* assert idassert DN */
assertedID = si->si_bc.sb_authzId;
break;
default:
assert( 0 );
}
/* if we got here, "" is allowed to proxyAuthz */
if ( BER_BVISNULL( &assertedID ) ) {
assertedID = slap_empty_bv;
}
/* don't idassert the bound DN (ITS#4497) */
if ( dn_match( &assertedID, bound_ndn ) ) {
goto done;
}
ctrl->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
ctrl->ldctl_iscritical = ( ( si->si_flags & LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL ) == LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL );
switch ( si->si_mode ) {
/* already in u:ID or dn:DN form */
case LDAP_BACK_IDASSERT_OTHERID:
case LDAP_BACK_IDASSERT_OTHERDN:
ber_dupbv_x( &ctrl->ldctl_value, &assertedID, op->o_tmpmemctx );
rs->sr_err = LDAP_SUCCESS;
break;
/* needs the dn: prefix */
default:
ctrl->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
ctrl->ldctl_value.bv_val = op->o_tmpalloc( ctrl->ldctl_value.bv_len + 1,
op->o_tmpmemctx );
AC_MEMCPY( ctrl->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
AC_MEMCPY( &ctrl->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
assertedID.bv_val, assertedID.bv_len + 1 );
rs->sr_err = LDAP_SUCCESS;
break;
}
/* Older versions of <draft-weltman-ldapv3-proxy> required
* to encode the value of the authzID (and called it proxyDN);
* this hack provides compatibility with those DSAs that
* implement it this way */
if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
struct berval authzID = ctrl->ldctl_value;
BerElementBuffer berbuf;
BerElement *ber = (BerElement *)&berbuf;
ber_tag_t tag;
ber_init2( ber, 0, LBER_USE_DER );
ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
tag = ber_printf( ber, "O", &authzID );
if ( tag == LBER_ERROR ) {
rs->sr_err = LDAP_OTHER;
goto free_ber;
}
if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
rs->sr_err = LDAP_OTHER;
goto free_ber;
}
rs->sr_err = LDAP_SUCCESS;
free_ber:;
op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
ber_free_buf( ber );
if ( rs->sr_err != LDAP_SUCCESS ) {
goto done;
}
} else if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
struct berval authzID = ctrl->ldctl_value,
tmp;
BerElementBuffer berbuf;
BerElement *ber = (BerElement *)&berbuf;
ber_tag_t tag;
if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
rs->sr_err = LDAP_PROTOCOL_ERROR;
goto done;
}
tmp = authzID;
tmp.bv_val += STRLENOF( "dn:" );
tmp.bv_len -= STRLENOF( "dn:" );
ber_init2( ber, 0, LBER_USE_DER );
ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
/* apparently, Mozilla API encodes this
* as "SEQUENCE { LDAPDN }" */
tag = ber_printf( ber, "{O}", &tmp );
if ( tag == LBER_ERROR ) {
rs->sr_err = LDAP_OTHER;
goto free_ber2;
}
if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
rs->sr_err = LDAP_OTHER;
goto free_ber2;
}
ctrl->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
rs->sr_err = LDAP_SUCCESS;
free_ber2:;
op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
ber_free_buf( ber );
if ( rs->sr_err != LDAP_SUCCESS ) {
goto done;
}
}
done:;
return rs->sr_err;
}
/*
* Add controls;
*
* if any needs to be added, it is prepended to existing ones,
* in a newly allocated array. The companion function
* mi->mi_ldap_extra->controls_free() must be used to restore the original
* status of op->o_ctrls.
*/
int
asyncmeta_controls_add( Operation *op,
SlapReply *rs,
a_metaconn_t *mc,
int candidate,
int isroot,
LDAPControl ***pctrls )
{
a_metainfo_t *mi = mc->mc_info;
a_metatarget_t *mt = mi->mi_targets[ candidate ];
a_metasingleconn_t *msc = &mc->mc_conns[ candidate ];
LDAPControl **ctrls = NULL;
/* set to the maximum number of controls this backend can add */
LDAPControl c[ 2 ] = {{ 0 }};
int n = 0, i, j1 = 0, j2 = 0;
*pctrls = NULL;
rs->sr_err = LDAP_SUCCESS;
/* don't add controls 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:
goto done;
}
/* put controls that go __before__ existing ones here */
/* proxyAuthz for identity assertion */
switch ( asyncmeta_back_proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
mt->mt_version, isroot, &mt->mt_idassert, &c[ j1 ] ) )
{
case SLAP_CB_CONTINUE:
break;
case LDAP_SUCCESS:
j1++;
break;
default:
goto done;
}
/* put controls that go __after__ existing ones here */
#ifdef SLAP_CONTROL_X_SESSION_TRACKING
/* session tracking */
if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
case SLAP_CB_CONTINUE:
break;
case LDAP_SUCCESS:
j2++;
break;
default:
goto done;
}
}
#endif /* SLAP_CONTROL_X_SESSION_TRACKING */
if ( rs->sr_err == SLAP_CB_CONTINUE ) {
rs->sr_err = LDAP_SUCCESS;
}
/* if nothing to do, just bail out */
if ( j1 == 0 && j2 == 0 ) {
goto done;
}
assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
if ( op->o_ctrls ) {
for ( n = 0; op->o_ctrls[ n ]; n++ )
/* just count ctrls */ ;
}
ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
op->o_tmpmemctx );
if ( j1 ) {
ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
*ctrls[ 0 ] = c[ 0 ];
for ( i = 1; i < j1; i++ ) {
ctrls[ i ] = &ctrls[ 0 ][ i ];
*ctrls[ i ] = c[ i ];
}
}
i = 0;
if ( op->o_ctrls ) {
for ( i = 0; op->o_ctrls[ i ]; i++ ) {
ctrls[ i + j1 ] = op->o_ctrls[ i ];
}
}
n += j1;
if ( j2 ) {
ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
*ctrls[ n ] = c[ j1 ];
for ( i = 1; i < j2; i++ ) {
ctrls[ n + i ] = &ctrls[ n ][ i ];
*ctrls[ n + i ] = c[ i ];
}
}
ctrls[ n + j2 ] = NULL;
done:;
if ( ctrls == NULL ) {
ctrls = op->o_ctrls;
}
*pctrls = ctrls;
return rs->sr_err;
}
/*
* asyncmeta_dobind_init()
*
* initiates bind for a candidate target
*/
meta_search_candidate_t
asyncmeta_dobind_init(Operation *op, SlapReply *rs, bm_context_t *bc, a_metaconn_t *mc, int candidate)
{
SlapReply *candidates = bc->candidates;
a_metainfo_t *mi = ( a_metainfo_t * )mc->mc_info;
a_metatarget_t *mt = mi->mi_targets[ candidate ];
a_metasingleconn_t *msc = &mc->mc_conns[ candidate ];
struct berval binddn = msc->msc_bound_ndn,
cred = msc->msc_cred;
int method;
int rc;
ber_int_t msgid;
meta_search_candidate_t retcode;
Debug( LDAP_DEBUG_TRACE, "%s >>> asyncmeta_dobind_init[%d]\n",
op->o_log_prefix, candidate );
if ( mc->mc_authz_target == META_BOUND_ALL ) {
return META_SEARCH_CANDIDATE;
}
if ( slapd_shutdown ) {
rs->sr_err = LDAP_UNAVAILABLE;
return META_SEARCH_ERR;
}
retcode = META_SEARCH_BINDING;
if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
/* already bound (or anonymous) */
#ifdef DEBUG_205
char buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
int bound = 0;
if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
bound = 1;
}
Debug( LDAP_DEBUG_ANY,
"### %s asyncmeta_dobind_init[%d] mc=%p ld=%p%s DN=\"%s\"\n",
op->o_log_prefix, candidate, (void *)mc,
(void *)msc->msc_ld, bound ? " bound" : " anonymous",
bound == 0 ? "" : msc->msc_bound_ndn.bv_val );
#endif /* DEBUG_205 */
retcode = META_SEARCH_CANDIDATE;
} else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) ) {
/* another thread is binding the target for this conn; wait */
#ifdef DEBUG_205
Debug( LDAP_DEBUG_ANY,
"### %s asyncmeta_dobind_init[%d] mc=%p ld=%p needbind\n",
op->o_log_prefix, candidate, (void *)mc,
(void *)msc->msc_ld );
#endif /* DEBUG_205 */
candidates[ candidate ].sr_msgid = META_MSGID_NEED_BIND;
retcode = META_SEARCH_NEED_BIND;
} else {
/* we'll need to bind the target for this conn */
#ifdef DEBUG_205
Debug( LDAP_DEBUG_ANY,
"### %s asyncmeta_dobind_init[%d] mc=%p ld=%p binding\n",
op->o_log_prefix, candidate, (void *)mc,
(void *)msc->msc_ld );
#endif /* DEBUG_205 */
if ( msc->msc_ld == NULL ) {
/* for some reason (e.g. because formerly in "binding"
* state, with eventual connection expiration or invalidation)
* it was not initialized as expected */
Debug( LDAP_DEBUG_ANY, "%s asyncmeta_dobind_init[%d] mc=%p ld=NULL\n",
op->o_log_prefix, candidate, (void *)mc );
rc = asyncmeta_init_one_conn( op, rs, mc, candidate,
LDAP_BACK_CONN_ISPRIV( mc ), LDAP_BACK_DONTSEND, 0 );
switch ( rc ) {
case LDAP_SUCCESS:
assert( msc->msc_ld != NULL );
break;
case LDAP_SERVER_DOWN:
case LDAP_UNAVAILABLE:
goto down;
default:
goto other;
}
}
LDAP_BACK_CONN_BINDING_SET( msc );
}
if ( retcode != META_SEARCH_BINDING ) {
return retcode;
}
if ( op->o_conn != NULL &&
!op->o_do_not_cache &&
( BER_BVISNULL( &msc->msc_bound_ndn ) ||
BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
{
rc = asyncmeta_back_proxy_authz_cred( mc, candidate, op, rs, LDAP_BACK_DONTSEND, &binddn, &cred, &method );
switch ( rc ) {
case LDAP_SUCCESS:
break;
case LDAP_UNAVAILABLE:
goto down;
default:
goto other;
}
/* NOTE: we copy things here, even if bind didn't succeed yet,
* because the connection is not shared until bind is over */
if ( !BER_BVISNULL( &binddn ) ) {
ber_bvreplace( &msc->msc_bound_ndn, &binddn );
if ( META_BACK_TGT_SAVECRED( mt ) && !BER_BVISNULL( &cred ) ) {
if ( !BER_BVISNULL( &msc->msc_cred ) ) {
memset( msc->msc_cred.bv_val, 0,
msc->msc_cred.bv_len );
}
ber_bvreplace( &msc->msc_cred, &cred );
}
}
if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
/* apparently, idassert was configured with SASL bind,
* so bind occurred inside meta_back_proxy_authz_cred() */
LDAP_BACK_CONN_BINDING_CLEAR( msc );
return META_SEARCH_CANDIDATE;
}
/* paranoid */
switch ( method ) {
case LDAP_AUTH_NONE:
case LDAP_AUTH_SIMPLE:
/* do a simple bind with binddn, cred */
break;
default:
assert( 0 );
break;
}
}
assert( msc->msc_ld != NULL );
if ( !BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &cred ) ) {
/* bind anonymously? */
Debug( LDAP_DEBUG_ANY, "%s asyncmeta_dobind_init[%d] mc=%p: "
"non-empty dn with empty cred; binding anonymously\n",
op->o_log_prefix, candidate, (void *)mc );
cred = slap_empty_bv;
} else if ( BER_BVISEMPTY( &binddn ) && !BER_BVISEMPTY( &cred ) ) {
/* error */
Debug( LDAP_DEBUG_ANY, "%s asyncmeta_dobind_init[%d] mc=%p: "
"empty dn with non-empty cred: error\n",
op->o_log_prefix, candidate, (void *)mc );
rc = LDAP_OTHER;
goto other;
}
retry_bind:
if ( LogTest( asyncmeta_debug ) ) {
char time_buf[ SLAP_TEXT_BUFLEN ];
asyncmeta_get_timestamp(time_buf);
Debug( asyncmeta_debug, "[%s] asyncmeta_dobind_init sending bind msc: %p\n",
time_buf, msc );
}
rc = ldap_sasl_bind( msc->msc_ld, binddn.bv_val, LDAP_SASL_SIMPLE, &cred,
NULL, NULL, &msgid );
ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rc );
if ( LogTest( asyncmeta_debug ) ) {
char time_buf[ SLAP_TEXT_BUFLEN ];
asyncmeta_get_timestamp(time_buf);
Debug( asyncmeta_debug, "[%s] asyncmeta_dobind_init rc=%d msc: %p\n",
time_buf, rc, msc );
}
if (rc == LDAP_SERVER_DOWN ) {
goto down;
} else if (rc == LDAP_BUSY) {
if (rs->sr_text == NULL) {
rs->sr_text = "Unable to establish LDAP connection to target within the specified network timeout.";
}
LDAP_BACK_CONN_BINDING_CLEAR( msc );
goto other;
}
/* mark as need bind so it gets send when the bind response is received */
candidates[ candidate ].sr_msgid = META_MSGID_NEED_BIND;
asyncmeta_set_msc_time(msc);
#ifdef DEBUG_205
Debug( LDAP_DEBUG_ANY,
"### %s asyncmeta_dobind_init[%d] mc=%p ld=%p rc=%d\n",
op->o_log_prefix, candidate, (void *)mc,
(void *)mc->mc_conns[candidate].msc_ld, rc );
#endif /* DEBUG_205 */
switch ( rc ) {
case LDAP_SUCCESS:
assert( msgid >= 0 );
if ( LogTest( asyncmeta_debug ) ) {
char time_buf[ SLAP_TEXT_BUFLEN ];
asyncmeta_get_timestamp(time_buf);
Debug( asyncmeta_debug, "[%s] asyncmeta_dobind_init sending bind success msc: %p\n",
time_buf, msc );
}
META_BINDING_SET( &candidates[ candidate ] );
rs->sr_err = LDAP_SUCCESS;
msc->msc_binding_time = slap_get_time();
return META_SEARCH_BINDING;
case LDAP_X_CONNECTING:
/* must retry, same conn */
candidates[ candidate ].sr_msgid = META_MSGID_CONNECTING;
LDAP_BACK_CONN_BINDING_CLEAR( msc );
goto retry_bind;
case LDAP_SERVER_DOWN:
down:;
retcode = META_SEARCH_ERR;
rs->sr_err = LDAP_UNAVAILABLE;
if (rs->sr_text == NULL) {
rs->sr_text = "Unable to bind to remote target - target down or unavailable";
}
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
LDAP_BACK_CONN_BINDING_CLEAR( msc );
break;
/* fall thru */
default:
other:;
rs->sr_err = rc;
rc = slap_map_api2result( rs );
candidates[ candidate ].sr_err = rc;
if ( META_BACK_ONERR_STOP( mi ) ) {
retcode = META_SEARCH_ERR;
} else {
retcode = META_SEARCH_NOT_CANDIDATE;
}
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
LDAP_BACK_CONN_BINDING_CLEAR( msc );
break;
}
return retcode;
}
meta_search_candidate_t
asyncmeta_dobind_init_with_retry(Operation *op, SlapReply *rs, bm_context_t *bc, a_metaconn_t *mc, int candidate)
{
int rc;
a_metasingleconn_t *msc = &mc->mc_conns[candidate];
a_metainfo_t *mi = mc->mc_info;
a_metatarget_t *mt = mi->mi_targets[ candidate ];
if (META_BACK_CONN_INVALID(msc) || (LDAP_BACK_CONN_BINDING( msc ) && msc->msc_binding_time > 0
&& (msc->msc_binding_time + mt->mt_timeout[ SLAP_OP_BIND ]) < slap_get_time())) {
char buf[ SLAP_TEXT_BUFLEN ];
snprintf( buf, sizeof( buf ), "called from %s:%d", __FILE__, __LINE__ );
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
asyncmeta_reset_msc(NULL, mc, candidate, 0, buf);
rc = asyncmeta_init_one_conn( op, rs, mc, candidate,
LDAP_BACK_CONN_ISPRIV( mc ), LDAP_BACK_DONTSEND, 0 );
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
}
if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
return META_SEARCH_CANDIDATE;
}
retry_dobind:
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
rc = asyncmeta_dobind_init(op, rs, bc, mc, candidate);
if (rs->sr_err != LDAP_UNAVAILABLE && rs->sr_err != LDAP_BUSY) {
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
return rc;
} else if (bc->nretries[candidate] == 0) {
char buf[ SLAP_TEXT_BUFLEN ];
snprintf( buf, sizeof( buf ), "called from %s:%d", __FILE__, __LINE__ );
asyncmeta_reset_msc(NULL, mc, candidate, 0, buf);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
return rc;
}
/* need to retry */
bc->nretries[candidate]--;
if ( LogTest( LDAP_DEBUG_TRACE ) ) {
/* this lock is required; however,
* it's invoked only when logging is on */
ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
Debug( LDAP_DEBUG_ANY,
"%s asyncmeta_dobind_init_with_retry[%d]: retrying URI=\"%s\" DN=\"%s\".\n",
op->o_log_prefix, candidate, mt->mt_uri,
BER_BVISNULL(&msc->msc_bound_ndn) ? "" : msc->msc_bound_ndn.bv_val );
ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
}
asyncmeta_reset_msc(NULL, mc, candidate, 0, __FUNCTION__);
rc = asyncmeta_init_one_conn( op, rs, mc, candidate,
LDAP_BACK_CONN_ISPRIV( mc ), LDAP_BACK_DONTSEND, 0 );
if (rs->sr_err != LDAP_SUCCESS) {
asyncmeta_reset_msc(NULL, mc, candidate, 0, __FUNCTION__);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
return META_SEARCH_ERR;
}
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
goto retry_dobind;
return rc;
}
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