git.sur5r.net Git - openldap/blob - servers/slapd/back-meta/bind.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2007 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/errno.h>
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "../back-ldap/back-ldap.h"
  35 #include "back-meta.h"
  36 #undef ldap_debug       /* silence a warning in ldap-int.h */
  37 #include "../../../libraries/libldap/ldap-int.h"
  38
  39 #include "lutil_ldap.h"
  40
  41 static int
  42 meta_back_proxy_authz_bind(
  43         metaconn_t              *mc,
  44         int                     candidate,
  45         Operation               *op,
  46         SlapReply               *rs,
  47         ldap_back_send_t        sendok );
  48
  49 static int
  50 meta_back_single_bind(
  51         Operation               *op,
  52         SlapReply               *rs,
  53         metaconn_t              *mc,
  54         int                     candidate );
  55
  56 int
  57 meta_back_bind( Operation *op, SlapReply *rs )
  58 {
  59         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  60         metaconn_t      *mc = NULL;
  61
  62         int             rc = LDAP_OTHER,
  63                         i,
  64                         gotit = 0,
  65                         isroot = 0;
  66
  67         SlapReply       *candidates = meta_back_candidates_get( op );
  68
  69         rs->sr_err = LDAP_SUCCESS;
  70
  71         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  72                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  73
  74         /* the test on the bind method should be superfluous */
  75         if ( op->orb_method == LDAP_AUTH_SIMPLE
  76                 && be_isroot_dn( op->o_bd, &op->o_req_ndn ) )
  77         {
  78                 if ( !be_isroot_pw( op ) ) {
  79                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  80                         rs->sr_text = NULL;
  81                         send_ldap_result( op, rs );
  82                         return rs->sr_err;
  83                 }
  84
  85                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  86                         rs->sr_err = LDAP_SUCCESS;
  87                         rs->sr_text = NULL;
  88                         /* frontend will return success */
  89                         return rs->sr_err;
  90                 }
  91
  92                 isroot = 1;
  93         }
  94
  95         /* we need meta_back_getconn() not send result even on error,
  96          * because we want to intercept the error and make it
  97          * invalidCredentials */
  98         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
  99         if ( !mc ) {
 100                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
 101                         char    buf[ SLAP_TEXT_BUFLEN ];
 102
 103                         snprintf( buf, sizeof( buf ),
 104                                 "meta_back_bind: no target "
 105                                 "for dn \"%s\" (%d%s%s).",
 106                                 op->o_req_dn.bv_val, rs->sr_err,
 107                                 rs->sr_text ? ". " : "",
 108                                 rs->sr_text ? rs->sr_text : "" );
 109                         Debug( LDAP_DEBUG_ANY,
 110                                 "%s %s\n",
 111                                 op->o_log_prefix, buf, 0 );
 112                 }
 113
 114                 /* FIXME: there might be cases where we don't want
 115                  * to map the error onto invalidCredentials */
 116                 switch ( rs->sr_err ) {
 117                 case LDAP_NO_SUCH_OBJECT:
 118                 case LDAP_UNWILLING_TO_PERFORM:
 119                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 120                         rs->sr_text = NULL;
 121                         break;
 122                 }
 123                 send_ldap_result( op, rs );
 124                 return rs->sr_err;
 125         }
 126
 127         /*
 128          * Each target is scanned ...
 129          */
 130         mc->mc_authz_target = META_BOUND_NONE;
 131         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 132                 metatarget_t    *mt = mi->mi_targets[ i ];
 133                 int             lerr;
 134
 135                 /*
 136                  * Skip non-candidates
 137                  */
 138                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 139                         continue;
 140                 }
 141
 142                 if ( gotit == 0 ) {
 143                         /* set rc to LDAP_SUCCESS only if at least
 144                          * one candidate has been tried */
 145                         rc = LDAP_SUCCESS;
 146                         gotit = 1;
 147
 148                 } else if ( isroot == 0 ) {
 149                         /*
 150                          * A bind operation is expected to have
 151                          * ONE CANDIDATE ONLY!
 152                          */
 153                         Debug( LDAP_DEBUG_ANY,
 154                                 "### %s meta_back_bind: more than one"
 155                                 " candidate selected...\n",
 156                                 op->o_log_prefix, 0, 0 );
 157                 }
 158
 159                 if ( isroot ) {
 160                         if ( mt->mt_idassert_authmethod == LDAP_AUTH_NONE
 161                                 || BER_BVISNULL( &mt->mt_idassert_authcDN ) )
 162                         {
 163                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 164
 165                                 /* skip the target if no pseudorootdn is provided */
 166                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 167                                         ch_free( msc->msc_bound_ndn.bv_val );
 168                                         BER_BVZERO( &msc->msc_bound_ndn );
 169                                 }
 170
 171                                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 172                                         /* destroy sensitive data */
 173                                         memset( msc->msc_cred.bv_val, 0,
 174                                                 msc->msc_cred.bv_len );
 175                                         ch_free( msc->msc_cred.bv_val );
 176                                         BER_BVZERO( &msc->msc_cred );
 177                                 }
 178
 179                                 continue;
 180                         }
 181
 182
 183                         (void)meta_back_proxy_authz_bind( mc, i, op, rs, LDAP_BACK_DONTSEND );
 184                         lerr = rs->sr_err;
 185
 186                 } else {
 187                         lerr = meta_back_single_bind( op, rs, mc, i );
 188                 }
 189
 190                 if ( lerr != LDAP_SUCCESS ) {
 191                         rc = rs->sr_err = lerr;
 192                         /* FIXME: in some cases (e.g. unavailable)
 193                          * do not assume it's not candidate; rather
 194                          * mark this as an error to be eventually
 195                          * reported to client */
 196                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 197                         break;
 198                 }
 199         }
 200
 201         /* must re-insert if local DN changed as result of bind */
 202         if ( rc == LDAP_SUCCESS ) {
 203                 if ( isroot ) {
 204                         mc->mc_authz_target = META_BOUND_ALL;
 205                         ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
 206                 }
 207
 208                 if ( !LDAP_BACK_PCONN_ISPRIV( mc )
 209                         && !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) )
 210                 {
 211                         metaconn_t      *tmpmc;
 212                         int             lerr;
 213
 214                         /* wait for all other ops to release the connection */
 215 retry_lock:;
 216                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 217                         if ( mc->mc_refcnt > 1 ) {
 218                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 219                                 ldap_pvt_thread_yield();
 220                                 goto retry_lock;
 221                         }
 222
 223                         assert( mc->mc_refcnt == 1 );
 224 #if META_BACK_PRINT_CONNTREE > 0
 225                         meta_back_print_conntree( mi, ">>> meta_back_bind" );
 226 #endif /* META_BACK_PRINT_CONNTREE */
 227                         tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 228                                 meta_back_conndn_cmp );
 229                         assert( tmpmc == mc );
 230
 231                         /* delete all cached connections with the current connection */
 232                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 233                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 234                                 {
 235                                         Debug( LDAP_DEBUG_TRACE,
 236                                                 "=>meta_back_bind: destroying conn %ld (refcnt=%u)\n",
 237                                                 LDAP_BACK_PCONN_ID( mc ), mc->mc_refcnt, 0 );
 238
 239                                         if ( tmpmc->mc_refcnt != 0 ) {
 240                                                 /* taint it */
 241                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 242
 243                                         } else {
 244                                                 /*
 245                                                  * Needs a test because the handler may be corrupted,
 246                                                  * and calling ldap_unbind on a corrupted header results
 247                                                  * in a segmentation fault
 248                                                  */
 249                                                 meta_back_conn_free( tmpmc );
 250                                         }
 251                                 }
 252                         }
 253
 254                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 255                         if ( isroot ) {
 256                                 LDAP_BACK_CONN_ISPRIV_SET( mc );
 257                                 LDAP_BACK_PCONN_SET( mc, op );
 258                         }
 259                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 260                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 261 #if META_BACK_PRINT_CONNTREE > 0
 262                         meta_back_print_conntree( mi, "<<< meta_back_bind" );
 263 #endif /* META_BACK_PRINT_CONNTREE */
 264                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 265                         if ( lerr == -1 ) {
 266                                 /* we can do this because mc_refcnt == 1 */
 267                                 assert( mc->mc_refcnt == 1 );
 268                                 mc->mc_refcnt = 0;
 269                                 meta_back_conn_free( mc );
 270                                 mc = NULL;
 271                         }
 272                 }
 273         }
 274
 275         if ( mc != NULL ) {
 276                 meta_back_release_conn( mi, mc );
 277         }
 278
 279         /*
 280          * rc is LDAP_SUCCESS if at least one bind succeeded,
 281          * err is the last error that occurred during a bind;
 282          * if at least (and at most?) one bind succeeds, fine.
 283          */
 284         if ( rc != LDAP_SUCCESS ) {
 285
 286                 /*
 287                  * deal with bind failure ...
 288                  */
 289
 290                 /*
 291                  * no target was found within the naming context,
 292                  * so bind must fail with invalid credentials
 293                  */
 294                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 295                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 296                 } else {
 297                         rs->sr_err = slap_map_api2result( rs );
 298                 }
 299                 send_ldap_result( op, rs );
 300                 return rs->sr_err;
 301
 302         }
 303
 304         return LDAP_SUCCESS;
 305 }
 306
 307 static int
 308 meta_back_bind_op_result(
 309         Operation               *op,
 310         SlapReply               *rs,
 311         metaconn_t              *mc,
 312         int                     candidate,
 313         int                     msgid,
 314         ldap_back_send_t        sendok )
 315 {
 316         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 317         metatarget_t            *mt = mi->mi_targets[ candidate ];
 318         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 319         LDAPMessage             *res;
 320         struct timeval          tv;
 321         int                     rc;
 322         int                     nretries = mt->mt_nretries;
 323         char                    buf[ SLAP_TEXT_BUFLEN ];
 324
 325         Debug( LDAP_DEBUG_TRACE,
 326                 ">>> %s meta_back_bind_op_result[%d]\n",
 327                 op->o_log_prefix, candidate, 0 );
 328
 329         if ( rs->sr_err == LDAP_SUCCESS ) {
 330                 time_t          stoptime = (time_t)(-1),
 331                                 timeout;
 332                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 333                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 334                 const char      *timeout_text = "Operation timed out";
 335                 slap_op_t       opidx = slap_req2op( op->o_tag );
 336
 337                 /* since timeout is not specified, compute and use
 338                  * the one specific to the ongoing operation */
 339                 if ( opidx == LDAP_REQ_SEARCH ) {
 340                         if ( op->ors_tlimit <= 0 ) {
 341                                 timeout = 0;
 342
 343                         } else {
 344                                 timeout = op->ors_tlimit;
 345                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 346                                 timeout_text = NULL;
 347                         }
 348
 349                 } else {
 350                         timeout = mt->mt_timeout[ opidx ];
 351                 }
 352
 353                 /* better than nothing :) */
 354                 if ( timeout == 0 ) {
 355                         if ( mi->mi_idle_timeout ) {
 356                                 timeout = mi->mi_idle_timeout;
 357
 358                         } else if ( mi->mi_conn_ttl ) {
 359                                 timeout = mi->mi_conn_ttl;
 360                         }
 361                 }
 362
 363                 if ( timeout ) {
 364                         stoptime = op->o_time + timeout;
 365                 }
 366
 367                 LDAP_BACK_TV_SET( &tv );
 368
 369                 /*
 370                  * handle response!!!
 371                  */
 372 retry:;
 373                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 374                 switch ( rc ) {
 375                 case 0:
 376                         if ( nretries != META_RETRY_NEVER
 377                                 || ( timeout && slap_get_time() <= stoptime ) )
 378                         {
 379                                 ldap_pvt_thread_yield();
 380                                 if ( nretries > 0 ) {
 381                                         nretries--;
 382                                 }
 383                                 tv = mt->mt_bind_timeout;
 384                                 goto retry;
 385                         }
 386
 387                         /* don't let anyone else use this handler,
 388                          * because there's a pending bind that will not
 389                          * be acknowledged */
 390                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 391                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 392
 393 #ifdef DEBUG_205
 394                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 395                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 396 #endif /* DEBUG_205 */
 397
 398                         meta_clear_one_candidate( op, mc, candidate );
 399                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 400
 401                         rs->sr_err = timeout_err;
 402                         rs->sr_text = timeout_text;
 403                         break;
 404
 405                 case -1:
 406                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 407                                 &rs->sr_err );
 408
 409                         snprintf( buf, sizeof( buf ),
 410                                 "err=%d (%s) nretries=%d",
 411                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 412                         Debug( LDAP_DEBUG_ANY,
 413                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 414                                 op->o_log_prefix, candidate, buf );
 415                         break;
 416
 417                 default:
 418                         /* only touch when activity actually took place... */
 419                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 420                                 msc->msc_time = op->o_time;
 421                         }
 422
 423                         /* FIXME: matched? referrals? response controls? */
 424                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 425                                         NULL, NULL, NULL, NULL, 1 );
 426                         if ( rc != LDAP_SUCCESS ) {
 427                                 rs->sr_err = rc;
 428                         }
 429                         break;
 430                 }
 431         }
 432
 433         rs->sr_err = slap_map_api2result( rs );
 434
 435         Debug( LDAP_DEBUG_TRACE,
 436                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 437                 op->o_log_prefix, candidate, rs->sr_err );
 438
 439         return rs->sr_err;
 440 }
 441
 442 /*
 443  * meta_back_single_bind
 444  *
 445  * attempts to perform a bind with creds
 446  */
 447 static int
 448 meta_back_single_bind(
 449         Operation               *op,
 450         SlapReply               *rs,
 451         metaconn_t              *mc,
 452         int                     candidate )
 453 {
 454         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 455         metatarget_t            *mt = mi->mi_targets[ candidate ];
 456         struct berval           mdn = BER_BVNULL;
 457         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 458         int                     msgid;
 459         dncookie                dc;
 460
 461         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 462                 ch_free( msc->msc_bound_ndn.bv_val );
 463                 BER_BVZERO( &msc->msc_bound_ndn );
 464         }
 465
 466         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 467                 /* destroy sensitive data */
 468                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 469                 ch_free( msc->msc_cred.bv_val );
 470                 BER_BVZERO( &msc->msc_cred );
 471         }
 472
 473         /*
 474          * Rewrite the bind dn if needed
 475          */
 476         dc.target = mt;
 477         dc.conn = op->o_conn;
 478         dc.rs = rs;
 479         dc.ctx = "bindDN";
 480
 481         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 482                 rs->sr_text = "DN rewrite error";
 483                 rs->sr_err = LDAP_OTHER;
 484                 return rs->sr_err;
 485         }
 486
 487         /* FIXME: this fixes the bind problem right now; we need
 488          * to use the asynchronous version to get the "matched"
 489          * and more in case of failure ... */
 490         /* FIXME: should we check if at least some of the op->o_ctrls
 491          * can/should be passed? */
 492         for (;;) {
 493                 rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 494                         LDAP_SASL_SIMPLE, &op->orb_cred,
 495                         op->o_ctrls, NULL, &msgid );
 496                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
 497                         break;
 498                 }
 499                 ldap_pvt_thread_yield();
 500         }
 501         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 502         if ( rs->sr_err != LDAP_SUCCESS ) {
 503                 goto return_results;
 504         }
 505
 506         /* If defined, proxyAuthz will be used also when
 507          * back-ldap is the authorizing backend; for this
 508          * purpose, a successful bind is followed by a
 509          * bind with the configured identity assertion */
 510         /* NOTE: use with care */
 511         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 512                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 513                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 514                         goto return_results;
 515                 }
 516                 goto cache_refresh;
 517         }
 518
 519         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 520         LDAP_BACK_CONN_ISBOUND_SET( msc );
 521         mc->mc_authz_target = candidate;
 522
 523         if ( LDAP_BACK_SAVECRED( mi ) ) {
 524                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 525                         memset( msc->msc_cred.bv_val, 0,
 526                                 msc->msc_cred.bv_len );
 527                 }
 528                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 529                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 530         }
 531
 532 cache_refresh:;
 533         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 534                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 535         {
 536                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 537                                 &op->o_req_ndn, candidate );
 538         }
 539
 540 return_results:;
 541         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 542                 free( mdn.bv_val );
 543         }
 544
 545         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 546                 meta_back_quarantine( op, rs, candidate );
 547         }
 548
 549         return rs->sr_err;
 550 }
 551
 552 /*
 553  * meta_back_single_dobind
 554  */
 555 int
 556 meta_back_single_dobind(
 557         Operation               *op,
 558         SlapReply               *rs,
 559         metaconn_t              **mcp,
 560         int                     candidate,
 561         ldap_back_send_t        sendok,
 562         int                     nretries,
 563         int                     dolock )
 564 {
 565         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 566         metatarget_t            *mt = mi->mi_targets[ candidate ];
 567         metaconn_t              *mc = *mcp;
 568         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 569         static struct berval    cred = BER_BVC( "" );
 570         int                     msgid;
 571
 572         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 573
 574         /* NOTE: this obsoletes pseudorootdn */
 575         if ( op->o_conn != NULL &&
 576                 !op->o_do_not_cache &&
 577                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 578                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 579                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 580                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 581         {
 582                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 583
 584         } else {
 585
 586                 /* FIXME: should we check if at least some of the op->o_ctrls
 587                  * can/should be passed? */
 588                 for (;;) {
 589                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 590                                 "", LDAP_SASL_SIMPLE, &cred,
 591                                 NULL, NULL, &msgid );
 592                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 593                                 break;
 594                         }
 595                         ldap_pvt_thread_yield();
 596                 }
 597
 598                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 599         }
 600
 601         if ( rs->sr_err != LDAP_SUCCESS ) {
 602                 if ( dolock ) {
 603                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 604                 }
 605                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 606                 if ( META_BACK_ONERR_STOP( mi ) ) {
 607                         LDAP_BACK_CONN_TAINTED_SET( mc );
 608                         meta_back_release_conn_lock( mi, mc, 0 );
 609                         *mcp = NULL;
 610                 }
 611                 if ( dolock ) {
 612                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 613                 }
 614         }
 615
 616         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 617                 meta_back_quarantine( op, rs, candidate );
 618         }
 619
 620         return rs->sr_err;
 621 }
 622
 623 /*
 624  * meta_back_dobind
 625  */
 626 int
 627 meta_back_dobind(
 628         Operation               *op,
 629         SlapReply               *rs,
 630         metaconn_t              *mc,
 631         ldap_back_send_t        sendok )
 632 {
 633         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 634
 635         int                     bound = 0,
 636                                 i,
 637                                 isroot = 0;
 638
 639         SlapReply               *candidates = meta_back_candidates_get( op );
 640
 641         if ( be_isroot( op ) ) {
 642                 isroot = 1;
 643         }
 644
 645         Debug( LDAP_DEBUG_TRACE,
 646                 "%s meta_back_dobind: conn=%ld%s\n",
 647                 op->o_log_prefix,
 648                 LDAP_BACK_PCONN_ID( mc ),
 649                 isroot ? " (isroot)" : "" );
 650
 651         /*
 652          * all the targets are bound as pseudoroot
 653          */
 654         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 655                 bound = 1;
 656                 goto done;
 657         }
 658
 659         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 660                 metatarget_t            *mt = mi->mi_targets[ i ];
 661                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 662                 int                     rc;
 663
 664                 /*
 665                  * Not a candidate
 666                  */
 667                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 668                         continue;
 669                 }
 670
 671                 assert( msc->msc_ld != NULL );
 672
 673                 /*
 674                  * If the target is already bound it is skipped
 675                  */
 676
 677 retry_binding:;
 678                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 679                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 680                         || ( LDAP_BACK_CONN_ISANON( msc )
 681                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 682                 {
 683                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 684                         ++bound;
 685                         continue;
 686
 687                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 688                 {
 689                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 690                         ldap_pvt_thread_yield();
 691                         goto retry_binding;
 692
 693                 }
 694
 695                 LDAP_BACK_CONN_BINDING_SET( msc );
 696                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 697
 698                 rc = meta_back_single_dobind( op, rs, &mc, i,
 699                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 700                 /*
 701                  * NOTE: meta_back_single_dobind() already retries;
 702                  * in case of failure, it resets mc...
 703                  */
 704                 if ( rc != LDAP_SUCCESS ) {
 705                         char            buf[ SLAP_TEXT_BUFLEN ];
 706
 707                         if ( mc == NULL ) {
 708                                 /* meta_back_single_dobind() already sent
 709                                  * response and released connection */
 710                                 goto send_err;
 711                         }
 712
 713
 714                         if ( rc == LDAP_UNAVAILABLE ) {
 715                                 /* FIXME: meta_back_retry() already re-calls
 716                                  * meta_back_single_dobind() */
 717                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 718                                         goto retry_ok;
 719                                 }
 720
 721                                 if ( mc != NULL ) {
 722                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 723                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 724                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 725                                         meta_back_release_conn( mi, mc );
 726                                 }
 727
 728                                 return 0;
 729                         }
 730
 731                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 732                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 733                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 734
 735                         snprintf( buf, sizeof( buf ),
 736                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 737                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 738                                 rc, ldap_err2string( rc ) );
 739                         Debug( LDAP_DEBUG_ANY,
 740                                 "%s %s\n",
 741                                 op->o_log_prefix, buf, 0 );
 742
 743                         /*
 744                          * null cred bind should always succeed
 745                          * as anonymous, so a failure means
 746                          * the target is no longer candidate possibly
 747                          * due to technical reasons (remote host down?)
 748                          * so better clear the handle
 749                          */
 750                         /* leave the target candidate, but record the error for later use */
 751                         candidates[ i ].sr_err = rc;
 752                         if ( META_BACK_ONERR_STOP( mi ) ) {
 753                                 bound = 0;
 754                                 goto done;
 755                         }
 756
 757                         continue;
 758                 } /* else */
 759
 760 retry_ok:;
 761                 Debug( LDAP_DEBUG_TRACE,
 762                         "%s meta_back_dobind[%d]: "
 763                         "(%s)\n",
 764                         op->o_log_prefix, i,
 765                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 766
 767                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 768                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 769                 if ( isroot ) {
 770                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 771                 } else {
 772                         LDAP_BACK_CONN_ISANON_SET( msc );
 773                 }
 774                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 775                 ++bound;
 776         }
 777
 778 done:;
 779         Debug( LDAP_DEBUG_TRACE,
 780                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 781                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc ), bound );
 782
 783         if ( bound == 0 ) {
 784                 meta_back_release_conn( mi, mc );
 785
 786 send_err:;
 787                 if ( sendok & LDAP_BACK_SENDERR ) {
 788                         if ( rs->sr_err == LDAP_SUCCESS ) {
 789                                 rs->sr_err = LDAP_BUSY;
 790                         }
 791                         send_ldap_result( op, rs );
 792                 }
 793
 794                 return 0;
 795         }
 796
 797         return ( bound > 0 );
 798 }
 799
 800 /*
 801  * meta_back_default_rebind
 802  *
 803  * This is a callback used for chasing referrals using the same
 804  * credentials as the original user on this session.
 805  */
 806 int
 807 meta_back_default_rebind(
 808         LDAP                    *ld,
 809         LDAP_CONST char         *url,
 810         ber_tag_t               request,
 811         ber_int_t               msgid,
 812         void                    *params )
 813 {
 814         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 815
 816         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 817                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 818                         NULL, NULL, NULL );
 819 }
 820
 821 /*
 822  * meta_back_default_urllist
 823  *
 824  * This is a callback used for mucking with the urllist
 825  */
 826 int
 827 meta_back_default_urllist(
 828         LDAP            *ld,
 829         LDAPURLDesc     **urllist,
 830         LDAPURLDesc     **url,
 831         void            *params )
 832 {
 833         metatarget_t    *mt = (metatarget_t *)params;
 834         LDAPURLDesc     **urltail;
 835
 836         if ( urllist == url ) {
 837                 return LDAP_SUCCESS;
 838         }
 839
 840         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 841                 /* count */ ;
 842
 843         *urltail = *urllist;
 844         *urllist = *url;
 845         *url = NULL;
 846
 847         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 848         if ( mt->mt_uri ) {
 849                 ch_free( mt->mt_uri );
 850         }
 851
 852         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 853         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 854
 855         return LDAP_SUCCESS;
 856 }
 857
 858 int
 859 meta_back_cancel(
 860         metaconn_t              *mc,
 861         Operation               *op,
 862         SlapReply               *rs,
 863         ber_int_t               msgid,
 864         int                     candidate,
 865         ldap_back_send_t        sendok )
 866 {
 867         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 868
 869         metatarget_t            *mt = mi->mi_targets[ candidate ];
 870         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 871
 872         int                     rc = LDAP_OTHER;
 873
 874         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 875                 op->o_log_prefix, candidate, msgid );
 876
 877         /* default behavior */
 878         if ( META_BACK_TGT_ABANDON( mt ) ) {
 879                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 880
 881         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 882                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 883
 884         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 885                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 886
 887         } else {
 888                 assert( 0 );
 889         }
 890
 891         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 892                 op->o_log_prefix, candidate, rc );
 893
 894         return rc;
 895 }
 896
 897
 898
 899 /*
 900  * FIXME: error return must be handled in a cleaner way ...
 901  */
 902 int
 903 meta_back_op_result(
 904         metaconn_t              *mc,
 905         Operation               *op,
 906         SlapReply               *rs,
 907         int                     candidate,
 908         ber_int_t               msgid,
 909         time_t                  timeout,
 910         ldap_back_send_t        sendok )
 911 {
 912         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 913
 914         const char      *save_text = rs->sr_text,
 915                         *save_matched = rs->sr_matched;
 916         BerVarray       save_ref = rs->sr_ref;
 917         LDAPControl     **save_ctrls = rs->sr_ctrls;
 918         void            *matched_ctx = NULL;
 919
 920         char            *matched = NULL;
 921         char            *text = NULL;
 922         char            **refs = NULL;
 923         LDAPControl     **ctrls = NULL;
 924
 925         assert( mc != NULL );
 926
 927         rs->sr_text = NULL;
 928         rs->sr_matched = NULL;
 929         rs->sr_ref = NULL;
 930         rs->sr_ctrls = NULL;
 931
 932         if ( candidate != META_TARGET_NONE ) {
 933                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 934                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 935
 936 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 937
 938                 if ( ERR_OK( rs->sr_err ) ) {
 939                         int             rc;
 940                         struct timeval  tv;
 941                         LDAPMessage     *res = NULL;
 942                         time_t          stoptime = (time_t)(-1);
 943                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 944                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 945                         const char      *timeout_text = "Operation timed out";
 946
 947                         /* if timeout is not specified, compute and use
 948                          * the one specific to the ongoing operation */
 949                         if ( timeout == (time_t)(-1) ) {
 950                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 951
 952                                 if ( opidx == SLAP_OP_SEARCH ) {
 953                                         if ( op->ors_tlimit <= 0 ) {
 954                                                 timeout = 0;
 955
 956                                         } else {
 957                                                 timeout = op->ors_tlimit;
 958                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 959                                                 timeout_text = NULL;
 960                                         }
 961
 962                                 } else {
 963                                         timeout = mt->mt_timeout[ opidx ];
 964                                 }
 965                         }
 966
 967                         /* better than nothing :) */
 968                         if ( timeout == 0 ) {
 969                                 if ( mi->mi_idle_timeout ) {
 970                                         timeout = mi->mi_idle_timeout;
 971
 972                                 } else if ( mi->mi_conn_ttl ) {
 973                                         timeout = mi->mi_conn_ttl;
 974                                 }
 975                         }
 976
 977                         if ( timeout ) {
 978                                 stoptime = op->o_time + timeout;
 979                         }
 980
 981                         LDAP_BACK_TV_SET( &tv );
 982
 983 retry:;
 984                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 985                         switch ( rc ) {
 986                         case 0:
 987                                 if ( timeout && slap_get_time() > stoptime ) {
 988                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
 989                                         rs->sr_err = timeout_err;
 990                                         rs->sr_text = timeout_text;
 991                                         break;
 992                                 }
 993
 994                                 LDAP_BACK_TV_SET( &tv );
 995                                 ldap_pvt_thread_yield();
 996                                 goto retry;
 997
 998                         case -1:
 999                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1000                                                 &rs->sr_err );
1001                                 break;
1002
1003
1004                         /* otherwise get the result; if it is not
1005                          * LDAP_SUCCESS, record it in the reply
1006                          * structure (this includes
1007                          * LDAP_COMPARE_{TRUE|FALSE}) */
1008                         default:
1009                                 /* only touch when activity actually took place... */
1010                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1011                                         msc->msc_time = op->o_time;
1012                                 }
1013
1014                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1015                                                 &matched, &text, &refs, &ctrls, 1 );
1016                                 res = NULL;
1017                                 rs->sr_text = text;
1018                                 if ( rc != LDAP_SUCCESS ) {
1019                                         rs->sr_err = rc;
1020                                 }
1021
1022                                 /* RFC 4511: referrals can only appear
1023                                  * if result code is LDAP_REFERRAL */
1024                                 if ( refs != NULL
1025                                         && refs[ 0 ] != NULL
1026                                         && refs[ 0 ][ 0 ] != '\0' )
1027                                 {
1028                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1029                                                 Debug( LDAP_DEBUG_ANY,
1030                                                         "%s meta_back_op_result[%d]: "
1031                                                         "got referrals with err=%d\n",
1032                                                         op->o_log_prefix,
1033                                                         candidate, rs->sr_err );
1034
1035                                         } else {
1036                                                 int     i;
1037
1038                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1039                                                         /* count */ ;
1040                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1041                                                         op->o_tmpmemctx );
1042                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1043                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1044                                                 }
1045                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1046                                         }
1047
1048                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1049                                         Debug( LDAP_DEBUG_ANY,
1050                                                 "%s meta_back_op_result[%d]: "
1051                                                 "got err=%d with null "
1052                                                 "or empty referrals\n",
1053                                                 op->o_log_prefix,
1054                                                 candidate, rs->sr_err );
1055
1056                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1057                                 }
1058
1059                                 if ( ctrls != NULL ) {
1060                                         rs->sr_ctrls = ctrls;
1061                                 }
1062                         }
1063
1064                         assert( res == NULL );
1065                 }
1066
1067                 /* if the error in the reply structure is not
1068                  * LDAP_SUCCESS, try to map it from client
1069                  * to server error */
1070                 if ( !ERR_OK( rs->sr_err ) ) {
1071                         rs->sr_err = slap_map_api2result( rs );
1072
1073                         /* internal ops ( op->o_conn == NULL )
1074                          * must not reply to client */
1075                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1076
1077                                 /* record the (massaged) matched
1078                                  * DN into the reply structure */
1079                                 rs->sr_matched = matched;
1080                         }
1081                 }
1082
1083                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1084                         meta_back_quarantine( op, rs, candidate );
1085                 }
1086
1087         } else {
1088                 int     i,
1089                         err = rs->sr_err;
1090
1091                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1092                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1093                         char                    *xtext = NULL;
1094                         char                    *xmatched = NULL;
1095
1096                         rs->sr_err = LDAP_SUCCESS;
1097
1098                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1099                         if ( rs->sr_err != LDAP_SUCCESS ) {
1100                                 /*
1101                                  * better check the type of error. In some cases
1102                                  * (search ?) it might be better to return a
1103                                  * success if at least one of the targets gave
1104                                  * positive result ...
1105                                  */
1106                                 ldap_get_option( msc->msc_ld,
1107                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1108                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1109                                         ldap_memfree( xtext );
1110                                         xtext = NULL;
1111                                 }
1112
1113                                 ldap_get_option( msc->msc_ld,
1114                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1115                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1116                                         ldap_memfree( xmatched );
1117                                         xmatched = NULL;
1118                                 }
1119
1120                                 rs->sr_err = slap_map_api2result( rs );
1121
1122                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1123                                         char    buf[ SLAP_TEXT_BUFLEN ];
1124
1125                                         snprintf( buf, sizeof( buf ),
1126                                                 "meta_back_op_result[%d] "
1127                                                 "err=%d text=\"%s\" matched=\"%s\"",
1128                                                 i, rs->sr_err,
1129                                                 ( xtext ? xtext : "" ),
1130                                                 ( xmatched ? xmatched : "" ) );
1131                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1132                                                 op->o_log_prefix, buf, 0 );
1133                                 }
1134
1135                                 /*
1136                                  * FIXME: need to rewrite "match" (need rwinfo)
1137                                  */
1138                                 switch ( rs->sr_err ) {
1139                                 default:
1140                                         err = rs->sr_err;
1141                                         if ( xtext != NULL ) {
1142                                                 if ( text ) {
1143                                                         ldap_memfree( text );
1144                                                 }
1145                                                 text = xtext;
1146                                                 xtext = NULL;
1147                                         }
1148                                         if ( xmatched != NULL ) {
1149                                                 if ( matched ) {
1150                                                         ldap_memfree( matched );
1151                                                 }
1152                                                 matched = xmatched;
1153                                                 xmatched = NULL;
1154                                         }
1155                                         break;
1156                                 }
1157
1158                                 if ( xtext ) {
1159                                         ldap_memfree( xtext );
1160                                 }
1161
1162                                 if ( xmatched ) {
1163                                         ldap_memfree( xmatched );
1164                                 }
1165                         }
1166
1167                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1168                                 meta_back_quarantine( op, rs, i );
1169                         }
1170                 }
1171
1172                 if ( err != LDAP_SUCCESS ) {
1173                         rs->sr_err = err;
1174                 }
1175         }
1176
1177         if ( matched != NULL ) {
1178                 struct berval   dn, pdn;
1179
1180                 ber_str2bv( matched, 0, 0, &dn );
1181                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1182                         ldap_memfree( matched );
1183                         matched_ctx = op->o_tmpmemctx;
1184                         matched = pdn.bv_val;
1185                 }
1186                 rs->sr_matched = matched;
1187         }
1188
1189         if ( op->o_conn &&
1190                 ( ( sendok & LDAP_BACK_SENDOK )
1191                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1192         {
1193                 send_ldap_result( op, rs );
1194         }
1195         if ( matched ) {
1196                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1197         }
1198         if ( text ) {
1199                 ldap_memfree( text );
1200         }
1201         if ( rs->sr_ref ) {
1202                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1203                 rs->sr_ref = NULL;
1204         }
1205         if ( refs ) {
1206                 ber_memvfree( (void **)refs );
1207         }
1208         if ( ctrls ) {
1209                 assert( rs->sr_ctrls != NULL );
1210                 ldap_controls_free( ctrls );
1211         }
1212
1213         rs->sr_text = save_text;
1214         rs->sr_matched = save_matched;
1215         rs->sr_ref = save_ref;
1216         rs->sr_ctrls = save_ctrls;
1217
1218         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1219 }
1220
1221 /*
1222  * meta_back_proxy_authz_cred()
1223  *
1224  * prepares credentials & method for meta_back_proxy_authz_bind();
1225  * or, if method is SASL, performs the SASL bind directly.
1226  */
1227 int
1228 meta_back_proxy_authz_cred(
1229         metaconn_t              *mc,
1230         int                     candidate,
1231         Operation               *op,
1232         SlapReply               *rs,
1233         ldap_back_send_t        sendok,
1234         struct berval           *binddn,
1235         struct berval           *bindcred,
1236         int                     *method )
1237 {
1238         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1239         metatarget_t            *mt = mi->mi_targets[ candidate ];
1240         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1241         struct berval           ndn;
1242         int                     dobind = 0;
1243
1244         /* don't proxyAuthz if protocol is not LDAPv3 */
1245         switch ( mt->mt_version ) {
1246         case LDAP_VERSION3:
1247                 break;
1248
1249         case 0:
1250                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1251                         break;
1252                 }
1253                 /* fall thru */
1254
1255         default:
1256                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1257                 if ( sendok & LDAP_BACK_SENDERR ) {
1258                         send_ldap_result( op, rs );
1259                 }
1260                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1261                 goto done;
1262         }
1263
1264         if ( op->o_tag == LDAP_REQ_BIND ) {
1265                 ndn = op->o_req_ndn;
1266
1267         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1268                 ndn = op->o_conn->c_ndn;
1269
1270         } else {
1271                 ndn = op->o_ndn;
1272         }
1273
1274         /*
1275          * FIXME: we need to let clients use proxyAuthz
1276          * otherwise we cannot do symmetric pools of servers;
1277          * we have to live with the fact that a user can
1278          * authorize itself as any ID that is allowed
1279          * by the authzTo directive of the "proxyauthzdn".
1280          */
1281         /*
1282          * NOTE: current Proxy Authorization specification
1283          * and implementation do not allow proxy authorization
1284          * control to be provided with Bind requests
1285          */
1286         /*
1287          * if no bind took place yet, but the connection is bound
1288          * and the "proxyauthzdn" is set, then bind as
1289          * "proxyauthzdn" and explicitly add the proxyAuthz
1290          * control to every operation with the dn bound
1291          * to the connection as control value.
1292          */
1293
1294         /* bind as proxyauthzdn only if no idassert mode
1295          * is requested, or if the client's identity
1296          * is authorized */
1297         switch ( mt->mt_idassert_mode ) {
1298         case LDAP_BACK_IDASSERT_LEGACY:
1299                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1300                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1301                         {
1302                                 *binddn = mt->mt_idassert_authcDN;
1303                                 *bindcred = mt->mt_idassert_passwd;
1304                                 dobind = 1;
1305                         }
1306                 }
1307                 break;
1308
1309         default:
1310                 /* NOTE: rootdn can always idassert */
1311                 if ( BER_BVISNULL( &ndn )
1312                         && mt->mt_idassert_authz == NULL
1313                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1314                 {
1315                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1316                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1317                                 if ( sendok & LDAP_BACK_SENDERR ) {
1318                                         send_ldap_result( op, rs );
1319                                 }
1320                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1321                                 goto done;
1322
1323                         }
1324
1325                         rs->sr_err = LDAP_SUCCESS;
1326                         *binddn = slap_empty_bv;
1327                         *bindcred = slap_empty_bv;
1328                         break;
1329
1330                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1331                         struct berval authcDN;
1332
1333                         if ( BER_BVISNULL( &ndn ) ) {
1334                                 authcDN = slap_empty_bv;
1335
1336                         } else {
1337                                 authcDN = ndn;
1338                         }
1339                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1340                                         &authcDN, &authcDN );
1341                         if ( rs->sr_err != LDAP_SUCCESS ) {
1342                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1343                                         if ( sendok & LDAP_BACK_SENDERR ) {
1344                                                 send_ldap_result( op, rs );
1345                                         }
1346                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1347                                         goto done;
1348                                 }
1349
1350                                 rs->sr_err = LDAP_SUCCESS;
1351                                 *binddn = slap_empty_bv;
1352                                 *bindcred = slap_empty_bv;
1353                                 break;
1354                         }
1355                 }
1356
1357                 *binddn = mt->mt_idassert_authcDN;
1358                 *bindcred = mt->mt_idassert_passwd;
1359                 dobind = 1;
1360                 break;
1361         }
1362
1363         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1364 #ifdef HAVE_CYRUS_SASL
1365                 void            *defaults = NULL;
1366                 struct berval   authzID = BER_BVNULL;
1367                 int             freeauthz = 0;
1368
1369                 /* if SASL supports native authz, prepare for it */
1370                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1371                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1372                 {
1373                         switch ( mt->mt_idassert_mode ) {
1374                         case LDAP_BACK_IDASSERT_OTHERID:
1375                         case LDAP_BACK_IDASSERT_OTHERDN:
1376                                 authzID = mt->mt_idassert_authzID;
1377                                 break;
1378
1379                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1380                                 BER_BVSTR( &authzID, "dn:" );
1381                                 break;
1382
1383                         case LDAP_BACK_IDASSERT_SELF:
1384                                 if ( BER_BVISNULL( &ndn ) ) {
1385                                         /* connection is not authc'd, so don't idassert */
1386                                         BER_BVSTR( &authzID, "dn:" );
1387                                         break;
1388                                 }
1389                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1390                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1391                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1392                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1393                                                 ndn.bv_val, ndn.bv_len + 1 );
1394                                 freeauthz = 1;
1395                                 break;
1396
1397                         default:
1398                                 break;
1399                         }
1400                 }
1401
1402                 if ( mt->mt_idassert_secprops != NULL ) {
1403                         rs->sr_err = ldap_set_option( msc->msc_ld,
1404                                 LDAP_OPT_X_SASL_SECPROPS,
1405                                 (void *)mt->mt_idassert_secprops );
1406
1407                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1408                                 rs->sr_err = LDAP_OTHER;
1409                                 if ( sendok & LDAP_BACK_SENDERR ) {
1410                                         send_ldap_result( op, rs );
1411                                 }
1412                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1413                                 goto done;
1414                         }
1415                 }
1416
1417                 defaults = lutil_sasl_defaults( msc->msc_ld,
1418                                 mt->mt_idassert_sasl_mech.bv_val,
1419                                 mt->mt_idassert_sasl_realm.bv_val,
1420                                 mt->mt_idassert_authcID.bv_val,
1421                                 mt->mt_idassert_passwd.bv_val,
1422                                 authzID.bv_val );
1423
1424                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1425                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1426                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1427                                 defaults );
1428
1429                 rs->sr_err = slap_map_api2result( rs );
1430                 if ( rs->sr_err != LDAP_SUCCESS ) {
1431                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1432                         if ( sendok & LDAP_BACK_SENDERR ) {
1433                                 send_ldap_result( op, rs );
1434                         }
1435
1436                 } else {
1437                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1438                 }
1439
1440                 lutil_sasl_freedefs( defaults );
1441                 if ( freeauthz ) {
1442                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1443                 }
1444
1445                 goto done;
1446 #endif /* HAVE_CYRUS_SASL */
1447         }
1448
1449         *method = mt->mt_idassert_authmethod;
1450         switch ( mt->mt_idassert_authmethod ) {
1451         case LDAP_AUTH_NONE:
1452                 BER_BVSTR( binddn, "" );
1453                 BER_BVSTR( bindcred, "" );
1454                 /* fallthru */
1455
1456         case LDAP_AUTH_SIMPLE:
1457                 break;
1458
1459         default:
1460                 /* unsupported! */
1461                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1462                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1463                 if ( sendok & LDAP_BACK_SENDERR ) {
1464                         send_ldap_result( op, rs );
1465                 }
1466                 break;
1467         }
1468
1469 done:;
1470         return rs->sr_err;
1471 }
1472
1473 static int
1474 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1475 {
1476         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1477         metatarget_t            *mt = mi->mi_targets[ candidate ];
1478         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1479         struct berval           binddn = BER_BVC( "" ),
1480                                 cred = BER_BVC( "" );
1481         int                     method = LDAP_AUTH_NONE,
1482                                 rc;
1483
1484         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1485         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1486                 int     msgid;
1487
1488                 switch ( method ) {
1489                 case LDAP_AUTH_NONE:
1490                 case LDAP_AUTH_SIMPLE:
1491                         for (;;) {
1492                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1493                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1494                                         &cred, NULL, NULL, &msgid );
1495                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1496                                         break;
1497                                 }
1498                                 ldap_pvt_thread_yield();
1499                         }
1500                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1501                         if ( rc == LDAP_SUCCESS ) {
1502                                 /* set rebind stuff in case of successful proxyAuthz bind,
1503                                  * so that referral chasing is attempted using the right
1504                                  * identity */
1505                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1506                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1507
1508                                 if ( LDAP_BACK_SAVECRED( mi ) ) {
1509                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1510                                                 memset( msc->msc_cred.bv_val, 0,
1511                                                         msc->msc_cred.bv_len );
1512                                         }
1513                                         ber_bvreplace( &msc->msc_cred, &cred );
1514                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1515                                 }
1516                         }
1517                         break;
1518
1519                 default:
1520                         assert( 0 );
1521                         break;
1522                 }
1523         }
1524
1525         return LDAP_BACK_CONN_ISBOUND( msc );
1526 }