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 1999-2010 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;
  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         switch ( be_rootdn_bind( op, rs ) ) {
  76         case LDAP_SUCCESS:
  77                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  78                         /* frontend will return success */
  79                         return rs->sr_err;
  80                 }
  81
  82                 isroot = 1;
  83                 /* fallthru */
  84
  85         case SLAP_CB_CONTINUE:
  86                 break;
  87
  88         default:
  89                 /* be_rootdn_bind() sent result */
  90                 return rs->sr_err;
  91         }
  92
  93         /* we need meta_back_getconn() not send result even on error,
  94          * because we want to intercept the error and make it
  95          * invalidCredentials */
  96         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
  97         if ( !mc ) {
  98                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
  99                         char    buf[ SLAP_TEXT_BUFLEN ];
 100
 101                         snprintf( buf, sizeof( buf ),
 102                                 "meta_back_bind: no target "
 103                                 "for dn \"%s\" (%d%s%s).",
 104                                 op->o_req_dn.bv_val, rs->sr_err,
 105                                 rs->sr_text ? ". " : "",
 106                                 rs->sr_text ? rs->sr_text : "" );
 107                         Debug( LDAP_DEBUG_ANY,
 108                                 "%s %s\n",
 109                                 op->o_log_prefix, buf, 0 );
 110                 }
 111
 112                 /* FIXME: there might be cases where we don't want
 113                  * to map the error onto invalidCredentials */
 114                 switch ( rs->sr_err ) {
 115                 case LDAP_NO_SUCH_OBJECT:
 116                 case LDAP_UNWILLING_TO_PERFORM:
 117                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 118                         rs->sr_text = NULL;
 119                         break;
 120                 }
 121                 send_ldap_result( op, rs );
 122                 return rs->sr_err;
 123         }
 124
 125         candidates = meta_back_candidates_get( op );
 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 ) {
 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
 193                         /* FIXME: in some cases (e.g. unavailable)
 194                          * do not assume it's not candidate; rather
 195                          * mark this as an error to be eventually
 196                          * reported to client */
 197                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 198                         break;
 199                 }
 200         }
 201
 202         /* must re-insert if local DN changed as result of bind */
 203         if ( rc == LDAP_SUCCESS ) {
 204                 if ( isroot ) {
 205                         mc->mc_authz_target = META_BOUND_ALL;
 206                 }
 207
 208                 if ( !LDAP_BACK_PCONN_ISPRIV( mc )
 209                         && !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) )
 210                 {
 211                         int             lerr;
 212
 213                         /* wait for all other ops to release the connection */
 214                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 215                         assert( mc->mc_refcnt == 1 );
 216 #if META_BACK_PRINT_CONNTREE > 0
 217                         meta_back_print_conntree( mi, ">>> meta_back_bind" );
 218 #endif /* META_BACK_PRINT_CONNTREE */
 219
 220                         /* delete all cached connections with the current connection */
 221                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 222                                 metaconn_t      *tmpmc;
 223
 224                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 225                                 {
 226                                         assert( !LDAP_BACK_PCONN_ISPRIV( mc ) );
 227                                         Debug( LDAP_DEBUG_TRACE,
 228                                                 "=>meta_back_bind: destroying conn %lu (refcnt=%u)\n",
 229                                                 mc->mc_conn->c_connid, mc->mc_refcnt, 0 );
 230
 231                                         if ( tmpmc->mc_refcnt != 0 ) {
 232                                                 /* taint it */
 233                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 234
 235                                         } else {
 236                                                 /*
 237                                                  * Needs a test because the handler may be corrupted,
 238                                                  * and calling ldap_unbind on a corrupted header results
 239                                                  * in a segmentation fault
 240                                                  */
 241                                                 meta_back_conn_free( tmpmc );
 242                                         }
 243                                 }
 244                         }
 245
 246                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 247                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 248                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 249 #if META_BACK_PRINT_CONNTREE > 0
 250                         meta_back_print_conntree( mi, "<<< meta_back_bind" );
 251 #endif /* META_BACK_PRINT_CONNTREE */
 252                         if ( lerr == 0 ) {
 253 #if 0
 254                                 /* NOTE: a connection cannot be privileged
 255                                  * and be in the avl tree at the same time
 256                                  */
 257                                 if ( isroot ) {
 258                                         LDAP_BACK_CONN_ISPRIV_SET( mc );
 259                                         LDAP_BACK_PCONN_SET( mc, op );
 260                                 }
 261 #endif
 262                                 LDAP_BACK_CONN_CACHED_SET( mc );
 263
 264                         } else {
 265                                 LDAP_BACK_CONN_CACHED_CLEAR( mc );
 266                         }
 267                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 268                 }
 269         }
 270
 271         if ( mc != NULL ) {
 272                 meta_back_release_conn( mi, mc );
 273         }
 274
 275         /*
 276          * rc is LDAP_SUCCESS if at least one bind succeeded,
 277          * err is the last error that occurred during a bind;
 278          * if at least (and at most?) one bind succeeds, fine.
 279          */
 280         if ( rc != LDAP_SUCCESS ) {
 281
 282                 /*
 283                  * deal with bind failure ...
 284                  */
 285
 286                 /*
 287                  * no target was found within the naming context,
 288                  * so bind must fail with invalid credentials
 289                  */
 290                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 291                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 292                 } else {
 293                         rs->sr_err = slap_map_api2result( rs );
 294                 }
 295                 send_ldap_result( op, rs );
 296                 return rs->sr_err;
 297
 298         }
 299
 300         return LDAP_SUCCESS;
 301 }
 302
 303 static int
 304 meta_back_bind_op_result(
 305         Operation               *op,
 306         SlapReply               *rs,
 307         metaconn_t              *mc,
 308         int                     candidate,
 309         int                     msgid,
 310         ldap_back_send_t        sendok )
 311 {
 312         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 313         metatarget_t            *mt = mi->mi_targets[ candidate ];
 314         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 315         LDAPMessage             *res;
 316         struct timeval          tv;
 317         int                     rc;
 318         int                     nretries = mt->mt_nretries;
 319         char                    buf[ SLAP_TEXT_BUFLEN ];
 320
 321         Debug( LDAP_DEBUG_TRACE,
 322                 ">>> %s meta_back_bind_op_result[%d]\n",
 323                 op->o_log_prefix, candidate, 0 );
 324
 325         /* make sure this is clean */
 326         assert( rs->sr_ctrls == NULL );
 327
 328         if ( rs->sr_err == LDAP_SUCCESS ) {
 329                 time_t          stoptime = (time_t)(-1),
 330                                 timeout;
 331                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 332                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 333                 const char      *timeout_text = "Operation timed out";
 334                 slap_op_t       opidx = slap_req2op( op->o_tag );
 335
 336                 /* since timeout is not specified, compute and use
 337                  * the one specific to the ongoing operation */
 338                 if ( opidx == LDAP_REQ_SEARCH ) {
 339                         if ( op->ors_tlimit <= 0 ) {
 340                                 timeout = 0;
 341
 342                         } else {
 343                                 timeout = op->ors_tlimit;
 344                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 345                                 timeout_text = NULL;
 346                         }
 347
 348                 } else {
 349                         timeout = mt->mt_timeout[ opidx ];
 350                 }
 351
 352                 /* better than nothing :) */
 353                 if ( timeout == 0 ) {
 354                         if ( mi->mi_idle_timeout ) {
 355                                 timeout = mi->mi_idle_timeout;
 356
 357                         } else if ( mi->mi_conn_ttl ) {
 358                                 timeout = mi->mi_conn_ttl;
 359                         }
 360                 }
 361
 362                 if ( timeout ) {
 363                         stoptime = op->o_time + timeout;
 364                 }
 365
 366                 LDAP_BACK_TV_SET( &tv );
 367
 368                 /*
 369                  * handle response!!!
 370                  */
 371 retry:;
 372                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 373                 switch ( rc ) {
 374                 case 0:
 375                         if ( nretries != META_RETRY_NEVER
 376                                 || ( timeout && slap_get_time() <= stoptime ) )
 377                         {
 378                                 ldap_pvt_thread_yield();
 379                                 if ( nretries > 0 ) {
 380                                         nretries--;
 381                                 }
 382                                 tv = mt->mt_bind_timeout;
 383                                 goto retry;
 384                         }
 385
 386                         /* don't let anyone else use this handler,
 387                          * because there's a pending bind that will not
 388                          * be acknowledged */
 389                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 390                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 391
 392 #ifdef DEBUG_205
 393                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 394                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 395 #endif /* DEBUG_205 */
 396
 397                         meta_clear_one_candidate( op, mc, candidate );
 398                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 399
 400                         rs->sr_err = timeout_err;
 401                         rs->sr_text = timeout_text;
 402                         break;
 403
 404                 case -1:
 405                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 406                                 &rs->sr_err );
 407
 408                         snprintf( buf, sizeof( buf ),
 409                                 "err=%d (%s) nretries=%d",
 410                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 411                         Debug( LDAP_DEBUG_ANY,
 412                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 413                                 op->o_log_prefix, candidate, buf );
 414                         break;
 415
 416                 default:
 417                         /* only touch when activity actually took place... */
 418                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 419                                 msc->msc_time = op->o_time;
 420                         }
 421
 422                         /* FIXME: matched? referrals? response controls? */
 423                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 424                                         NULL, NULL, NULL, NULL, 1 );
 425                         if ( rc != LDAP_SUCCESS ) {
 426                                 rs->sr_err = rc;
 427                         }
 428                         break;
 429                 }
 430         }
 431
 432         rs->sr_err = slap_map_api2result( rs );
 433
 434         Debug( LDAP_DEBUG_TRACE,
 435                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 436                 op->o_log_prefix, candidate, rs->sr_err );
 437
 438         return rs->sr_err;
 439 }
 440
 441 /*
 442  * meta_back_single_bind
 443  *
 444  * attempts to perform a bind with creds
 445  */
 446 static int
 447 meta_back_single_bind(
 448         Operation               *op,
 449         SlapReply               *rs,
 450         metaconn_t              *mc,
 451         int                     candidate )
 452 {
 453         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 454         metatarget_t            *mt = mi->mi_targets[ candidate ];
 455         struct berval           mdn = BER_BVNULL;
 456         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 457         int                     msgid;
 458         dncookie                dc;
 459         struct berval           save_o_dn;
 460         int                     save_o_do_not_cache;
 461         LDAPControl             **ctrls = NULL;
 462
 463         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 464                 ch_free( msc->msc_bound_ndn.bv_val );
 465                 BER_BVZERO( &msc->msc_bound_ndn );
 466         }
 467
 468         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 469                 /* destroy sensitive data */
 470                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 471                 ch_free( msc->msc_cred.bv_val );
 472                 BER_BVZERO( &msc->msc_cred );
 473         }
 474
 475         /*
 476          * Rewrite the bind dn if needed
 477          */
 478         dc.target = mt;
 479         dc.conn = op->o_conn;
 480         dc.rs = rs;
 481         dc.ctx = "bindDN";
 482
 483         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 484                 rs->sr_text = "DN rewrite error";
 485                 rs->sr_err = LDAP_OTHER;
 486                 return rs->sr_err;
 487         }
 488
 489         /* don't add proxyAuthz; set the bindDN */
 490         save_o_dn = op->o_dn;
 491         save_o_do_not_cache = op->o_do_not_cache;
 492         op->o_do_not_cache = 1;
 493         op->o_dn = op->o_req_dn;
 494
 495         ctrls = op->o_ctrls;
 496         rs->sr_err = meta_back_controls_add( op, rs, mc, candidate, &ctrls );
 497         op->o_dn = save_o_dn;
 498         op->o_do_not_cache = save_o_do_not_cache;
 499         if ( rs->sr_err != LDAP_SUCCESS ) {
 500                 goto return_results;
 501         }
 502
 503         /* FIXME: this fixes the bind problem right now; we need
 504          * to use the asynchronous version to get the "matched"
 505          * and more in case of failure ... */
 506         /* FIXME: should we check if at least some of the op->o_ctrls
 507          * can/should be passed? */
 508         for (;;) {
 509                 rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 510                         LDAP_SASL_SIMPLE, &op->orb_cred,
 511                         ctrls, NULL, &msgid );
 512                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
 513                         break;
 514                 }
 515                 ldap_pvt_thread_yield();
 516         }
 517
 518         mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
 519
 520         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 521         if ( rs->sr_err != LDAP_SUCCESS ) {
 522                 goto return_results;
 523         }
 524
 525         /* If defined, proxyAuthz will be used also when
 526          * back-ldap is the authorizing backend; for this
 527          * purpose, a successful bind is followed by a
 528          * bind with the configured identity assertion */
 529         /* NOTE: use with care */
 530         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 531                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 532                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 533                         goto return_results;
 534                 }
 535                 goto cache_refresh;
 536         }
 537
 538         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 539         LDAP_BACK_CONN_ISBOUND_SET( msc );
 540         mc->mc_authz_target = candidate;
 541
 542         if ( META_BACK_TGT_SAVECRED( mt ) ) {
 543                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 544                         memset( msc->msc_cred.bv_val, 0,
 545                                 msc->msc_cred.bv_len );
 546                 }
 547                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 548                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 549         }
 550
 551 cache_refresh:;
 552         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 553                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 554         {
 555                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 556                                 &op->o_req_ndn, candidate );
 557         }
 558
 559 return_results:;
 560         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 561                 free( mdn.bv_val );
 562         }
 563
 564         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 565                 meta_back_quarantine( op, rs, candidate );
 566         }
 567
 568         return rs->sr_err;
 569 }
 570
 571 /*
 572  * meta_back_single_dobind
 573  */
 574 int
 575 meta_back_single_dobind(
 576         Operation               *op,
 577         SlapReply               *rs,
 578         metaconn_t              **mcp,
 579         int                     candidate,
 580         ldap_back_send_t        sendok,
 581         int                     nretries,
 582         int                     dolock )
 583 {
 584         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 585         metatarget_t            *mt = mi->mi_targets[ candidate ];
 586         metaconn_t              *mc = *mcp;
 587         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 588         static struct berval    cred = BER_BVC( "" );
 589         int                     msgid;
 590
 591         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 592
 593         /* NOTE: this obsoletes pseudorootdn */
 594         if ( op->o_conn != NULL &&
 595                 !op->o_do_not_cache &&
 596                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 597                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 598                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 599                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 600         {
 601                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 602
 603         } else {
 604
 605                 /* FIXME: should we check if at least some of the op->o_ctrls
 606                  * can/should be passed? */
 607                 for (;;) {
 608                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 609                                 "", LDAP_SASL_SIMPLE, &cred,
 610                                 NULL, NULL, &msgid );
 611                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 612                                 break;
 613                         }
 614                         ldap_pvt_thread_yield();
 615                 }
 616
 617                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 618         }
 619
 620         if ( rs->sr_err != LDAP_SUCCESS ) {
 621                 if ( dolock ) {
 622                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 623                 }
 624                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 625                 if ( META_BACK_ONERR_STOP( mi ) ) {
 626                         LDAP_BACK_CONN_TAINTED_SET( mc );
 627                         meta_back_release_conn_lock( mi, mc, 0 );
 628                         *mcp = NULL;
 629                 }
 630                 if ( dolock ) {
 631                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 632                 }
 633         }
 634
 635         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 636                 meta_back_quarantine( op, rs, candidate );
 637         }
 638
 639         return rs->sr_err;
 640 }
 641
 642 /*
 643  * meta_back_dobind
 644  */
 645 int
 646 meta_back_dobind(
 647         Operation               *op,
 648         SlapReply               *rs,
 649         metaconn_t              *mc,
 650         ldap_back_send_t        sendok )
 651 {
 652         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 653
 654         int                     bound = 0,
 655                                 i,
 656                                 isroot = 0;
 657
 658         SlapReply               *candidates;
 659
 660         if ( be_isroot( op ) ) {
 661                 isroot = 1;
 662         }
 663
 664         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 665                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 666                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 667
 668                 Debug( LDAP_DEBUG_TRACE,
 669                         "%s meta_back_dobind: conn=%s%s\n",
 670                         op->o_log_prefix, buf,
 671                         isroot ? " (isroot)" : "" );
 672         }
 673
 674         /*
 675          * all the targets are bound as pseudoroot
 676          */
 677         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 678                 bound = 1;
 679                 goto done;
 680         }
 681
 682         candidates = meta_back_candidates_get( op );
 683
 684         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 685                 metatarget_t            *mt = mi->mi_targets[ i ];
 686                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 687                 int                     rc;
 688
 689                 /*
 690                  * Not a candidate
 691                  */
 692                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 693                         continue;
 694                 }
 695
 696                 assert( msc->msc_ld != NULL );
 697
 698                 /*
 699                  * If the target is already bound it is skipped
 700                  */
 701
 702 retry_binding:;
 703                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 704                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 705                         || ( LDAP_BACK_CONN_ISANON( msc )
 706                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 707                 {
 708                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 709                         ++bound;
 710                         continue;
 711
 712                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 713                 {
 714                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 715                         ldap_pvt_thread_yield();
 716                         goto retry_binding;
 717
 718                 }
 719
 720                 LDAP_BACK_CONN_BINDING_SET( msc );
 721                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 722
 723                 rc = meta_back_single_dobind( op, rs, &mc, i,
 724                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 725                 /*
 726                  * NOTE: meta_back_single_dobind() already retries;
 727                  * in case of failure, it resets mc...
 728                  */
 729                 if ( rc != LDAP_SUCCESS ) {
 730                         char            buf[ SLAP_TEXT_BUFLEN ];
 731
 732                         if ( mc == NULL ) {
 733                                 /* meta_back_single_dobind() already sent
 734                                  * response and released connection */
 735                                 goto send_err;
 736                         }
 737
 738
 739                         if ( rc == LDAP_UNAVAILABLE ) {
 740                                 /* FIXME: meta_back_retry() already re-calls
 741                                  * meta_back_single_dobind() */
 742                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 743                                         goto retry_ok;
 744                                 }
 745
 746                                 if ( mc != NULL ) {
 747                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 748                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 749                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 750                                         meta_back_release_conn( mi, mc );
 751                                 }
 752
 753                                 return 0;
 754                         }
 755
 756                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 757                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 758                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 759
 760                         snprintf( buf, sizeof( buf ),
 761                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 762                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 763                                 rc, ldap_err2string( rc ) );
 764                         Debug( LDAP_DEBUG_ANY,
 765                                 "%s %s\n",
 766                                 op->o_log_prefix, buf, 0 );
 767
 768                         /*
 769                          * null cred bind should always succeed
 770                          * as anonymous, so a failure means
 771                          * the target is no longer candidate possibly
 772                          * due to technical reasons (remote host down?)
 773                          * so better clear the handle
 774                          */
 775                         /* leave the target candidate, but record the error for later use */
 776                         candidates[ i ].sr_err = rc;
 777                         if ( META_BACK_ONERR_STOP( mi ) ) {
 778                                 bound = 0;
 779                                 goto done;
 780                         }
 781
 782                         continue;
 783                 } /* else */
 784
 785 retry_ok:;
 786                 Debug( LDAP_DEBUG_TRACE,
 787                         "%s meta_back_dobind[%d]: "
 788                         "(%s)\n",
 789                         op->o_log_prefix, i,
 790                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 791
 792                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 793                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 794                 if ( isroot ) {
 795                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 796                 } else {
 797                         LDAP_BACK_CONN_ISANON_SET( msc );
 798                 }
 799                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 800                 ++bound;
 801         }
 802
 803 done:;
 804         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 805                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 806                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 807
 808                 Debug( LDAP_DEBUG_TRACE,
 809                         "%s meta_back_dobind: conn=%s bound=%d\n",
 810                         op->o_log_prefix, buf, bound );
 811         }
 812
 813         if ( bound == 0 ) {
 814                 meta_back_release_conn( mi, mc );
 815
 816 send_err:;
 817                 if ( sendok & LDAP_BACK_SENDERR ) {
 818                         if ( rs->sr_err == LDAP_SUCCESS ) {
 819                                 rs->sr_err = LDAP_BUSY;
 820                         }
 821                         send_ldap_result( op, rs );
 822                 }
 823
 824                 return 0;
 825         }
 826
 827         return ( bound > 0 );
 828 }
 829
 830 /*
 831  * meta_back_default_rebind
 832  *
 833  * This is a callback used for chasing referrals using the same
 834  * credentials as the original user on this session.
 835  */
 836 int
 837 meta_back_default_rebind(
 838         LDAP                    *ld,
 839         LDAP_CONST char         *url,
 840         ber_tag_t               request,
 841         ber_int_t               msgid,
 842         void                    *params )
 843 {
 844         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 845
 846         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 847                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 848                         NULL, NULL, NULL );
 849 }
 850
 851 /*
 852  * meta_back_default_urllist
 853  *
 854  * This is a callback used for mucking with the urllist
 855  */
 856 int
 857 meta_back_default_urllist(
 858         LDAP            *ld,
 859         LDAPURLDesc     **urllist,
 860         LDAPURLDesc     **url,
 861         void            *params )
 862 {
 863         metatarget_t    *mt = (metatarget_t *)params;
 864         LDAPURLDesc     **urltail;
 865
 866         if ( urllist == url ) {
 867                 return LDAP_SUCCESS;
 868         }
 869
 870         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 871                 /* count */ ;
 872
 873         *urltail = *urllist;
 874         *urllist = *url;
 875         *url = NULL;
 876
 877         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 878         if ( mt->mt_uri ) {
 879                 ch_free( mt->mt_uri );
 880         }
 881
 882         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 883         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 884
 885         return LDAP_SUCCESS;
 886 }
 887
 888 int
 889 meta_back_cancel(
 890         metaconn_t              *mc,
 891         Operation               *op,
 892         SlapReply               *rs,
 893         ber_int_t               msgid,
 894         int                     candidate,
 895         ldap_back_send_t        sendok )
 896 {
 897         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 898
 899         metatarget_t            *mt = mi->mi_targets[ candidate ];
 900         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 901
 902         int                     rc = LDAP_OTHER;
 903
 904         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 905                 op->o_log_prefix, candidate, msgid );
 906
 907         /* default behavior */
 908         if ( META_BACK_TGT_ABANDON( mt ) ) {
 909                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 910
 911         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 912                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 913
 914         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 915                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 916
 917         } else {
 918                 assert( 0 );
 919         }
 920
 921         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 922                 op->o_log_prefix, candidate, rc );
 923
 924         return rc;
 925 }
 926
 927
 928
 929 /*
 930  * FIXME: error return must be handled in a cleaner way ...
 931  */
 932 int
 933 meta_back_op_result(
 934         metaconn_t              *mc,
 935         Operation               *op,
 936         SlapReply               *rs,
 937         int                     candidate,
 938         ber_int_t               msgid,
 939         time_t                  timeout,
 940         ldap_back_send_t        sendok )
 941 {
 942         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 943
 944         const char      *save_text = rs->sr_text,
 945                         *save_matched = rs->sr_matched;
 946         BerVarray       save_ref = rs->sr_ref;
 947         LDAPControl     **save_ctrls = rs->sr_ctrls;
 948         void            *matched_ctx = NULL;
 949
 950         char            *matched = NULL;
 951         char            *text = NULL;
 952         char            **refs = NULL;
 953         LDAPControl     **ctrls = NULL;
 954
 955         assert( mc != NULL );
 956
 957         rs->sr_text = NULL;
 958         rs->sr_matched = NULL;
 959         rs->sr_ref = NULL;
 960         rs->sr_ctrls = NULL;
 961
 962         if ( candidate != META_TARGET_NONE ) {
 963                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 964                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 965
 966                 if ( LDAP_ERR_OK( rs->sr_err ) ) {
 967                         int             rc;
 968                         struct timeval  tv;
 969                         LDAPMessage     *res = NULL;
 970                         time_t          stoptime = (time_t)(-1);
 971                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 972                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 973                         const char      *timeout_text = "Operation timed out";
 974
 975                         /* if timeout is not specified, compute and use
 976                          * the one specific to the ongoing operation */
 977                         if ( timeout == (time_t)(-1) ) {
 978                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 979
 980                                 if ( opidx == SLAP_OP_SEARCH ) {
 981                                         if ( op->ors_tlimit <= 0 ) {
 982                                                 timeout = 0;
 983
 984                                         } else {
 985                                                 timeout = op->ors_tlimit;
 986                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 987                                                 timeout_text = NULL;
 988                                         }
 989
 990                                 } else {
 991                                         timeout = mt->mt_timeout[ opidx ];
 992                                 }
 993                         }
 994
 995                         /* better than nothing :) */
 996                         if ( timeout == 0 ) {
 997                                 if ( mi->mi_idle_timeout ) {
 998                                         timeout = mi->mi_idle_timeout;
 999
1000                                 } else if ( mi->mi_conn_ttl ) {
1001                                         timeout = mi->mi_conn_ttl;
1002                                 }
1003                         }
1004
1005                         if ( timeout ) {
1006                                 stoptime = op->o_time + timeout;
1007                         }
1008
1009                         LDAP_BACK_TV_SET( &tv );
1010
1011 retry:;
1012                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1013                         switch ( rc ) {
1014                         case 0:
1015                                 if ( timeout && slap_get_time() > stoptime ) {
1016                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
1017                                         rs->sr_err = timeout_err;
1018                                         rs->sr_text = timeout_text;
1019                                         break;
1020                                 }
1021
1022                                 LDAP_BACK_TV_SET( &tv );
1023                                 ldap_pvt_thread_yield();
1024                                 goto retry;
1025
1026                         case -1:
1027                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1028                                                 &rs->sr_err );
1029                                 break;
1030
1031
1032                         /* otherwise get the result; if it is not
1033                          * LDAP_SUCCESS, record it in the reply
1034                          * structure (this includes
1035                          * LDAP_COMPARE_{TRUE|FALSE}) */
1036                         default:
1037                                 /* only touch when activity actually took place... */
1038                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1039                                         msc->msc_time = op->o_time;
1040                                 }
1041
1042                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1043                                                 &matched, &text, &refs, &ctrls, 1 );
1044                                 res = NULL;
1045                                 rs->sr_text = text;
1046                                 if ( rc != LDAP_SUCCESS ) {
1047                                         rs->sr_err = rc;
1048                                 }
1049
1050                                 /* RFC 4511: referrals can only appear
1051                                  * if result code is LDAP_REFERRAL */
1052                                 if ( refs != NULL
1053                                         && refs[ 0 ] != NULL
1054                                         && refs[ 0 ][ 0 ] != '\0' )
1055                                 {
1056                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1057                                                 Debug( LDAP_DEBUG_ANY,
1058                                                         "%s meta_back_op_result[%d]: "
1059                                                         "got referrals with err=%d\n",
1060                                                         op->o_log_prefix,
1061                                                         candidate, rs->sr_err );
1062
1063                                         } else {
1064                                                 int     i;
1065
1066                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1067                                                         /* count */ ;
1068                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1069                                                         op->o_tmpmemctx );
1070                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1071                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1072                                                 }
1073                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1074                                         }
1075
1076                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1077                                         Debug( LDAP_DEBUG_ANY,
1078                                                 "%s meta_back_op_result[%d]: "
1079                                                 "got err=%d with null "
1080                                                 "or empty referrals\n",
1081                                                 op->o_log_prefix,
1082                                                 candidate, rs->sr_err );
1083
1084                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1085                                 }
1086
1087                                 if ( ctrls != NULL ) {
1088                                         rs->sr_ctrls = ctrls;
1089                                 }
1090                         }
1091
1092                         assert( res == NULL );
1093                 }
1094
1095                 /* if the error in the reply structure is not
1096                  * LDAP_SUCCESS, try to map it from client
1097                  * to server error */
1098                 if ( !LDAP_ERR_OK( rs->sr_err ) ) {
1099                         rs->sr_err = slap_map_api2result( rs );
1100
1101                         /* internal ops ( op->o_conn == NULL )
1102                          * must not reply to client */
1103                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1104
1105                                 /* record the (massaged) matched
1106                                  * DN into the reply structure */
1107                                 rs->sr_matched = matched;
1108                         }
1109                 }
1110
1111                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1112                         meta_back_quarantine( op, rs, candidate );
1113                 }
1114
1115         } else {
1116                 int     i,
1117                         err = rs->sr_err;
1118
1119                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1120                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1121                         char                    *xtext = NULL;
1122                         char                    *xmatched = NULL;
1123
1124                         rs->sr_err = LDAP_SUCCESS;
1125
1126                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1127                         if ( rs->sr_err != LDAP_SUCCESS ) {
1128                                 /*
1129                                  * better check the type of error. In some cases
1130                                  * (search ?) it might be better to return a
1131                                  * success if at least one of the targets gave
1132                                  * positive result ...
1133                                  */
1134                                 ldap_get_option( msc->msc_ld,
1135                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1136                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1137                                         ldap_memfree( xtext );
1138                                         xtext = NULL;
1139                                 }
1140
1141                                 ldap_get_option( msc->msc_ld,
1142                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1143                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1144                                         ldap_memfree( xmatched );
1145                                         xmatched = NULL;
1146                                 }
1147
1148                                 rs->sr_err = slap_map_api2result( rs );
1149
1150                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1151                                         char    buf[ SLAP_TEXT_BUFLEN ];
1152
1153                                         snprintf( buf, sizeof( buf ),
1154                                                 "meta_back_op_result[%d] "
1155                                                 "err=%d text=\"%s\" matched=\"%s\"",
1156                                                 i, rs->sr_err,
1157                                                 ( xtext ? xtext : "" ),
1158                                                 ( xmatched ? xmatched : "" ) );
1159                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1160                                                 op->o_log_prefix, buf, 0 );
1161                                 }
1162
1163                                 /*
1164                                  * FIXME: need to rewrite "match" (need rwinfo)
1165                                  */
1166                                 switch ( rs->sr_err ) {
1167                                 default:
1168                                         err = rs->sr_err;
1169                                         if ( xtext != NULL ) {
1170                                                 if ( text ) {
1171                                                         ldap_memfree( text );
1172                                                 }
1173                                                 text = xtext;
1174                                                 xtext = NULL;
1175                                         }
1176                                         if ( xmatched != NULL ) {
1177                                                 if ( matched ) {
1178                                                         ldap_memfree( matched );
1179                                                 }
1180                                                 matched = xmatched;
1181                                                 xmatched = NULL;
1182                                         }
1183                                         break;
1184                                 }
1185
1186                                 if ( xtext ) {
1187                                         ldap_memfree( xtext );
1188                                 }
1189
1190                                 if ( xmatched ) {
1191                                         ldap_memfree( xmatched );
1192                                 }
1193                         }
1194
1195                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1196                                 meta_back_quarantine( op, rs, i );
1197                         }
1198                 }
1199
1200                 if ( err != LDAP_SUCCESS ) {
1201                         rs->sr_err = err;
1202                 }
1203         }
1204
1205         if ( matched != NULL ) {
1206                 struct berval   dn, pdn;
1207
1208                 ber_str2bv( matched, 0, 0, &dn );
1209                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1210                         ldap_memfree( matched );
1211                         matched_ctx = op->o_tmpmemctx;
1212                         matched = pdn.bv_val;
1213                 }
1214                 rs->sr_matched = matched;
1215         }
1216
1217         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1218                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1219                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1220                                 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
1221                                 send_ldap_result( op, rs );
1222                         }
1223                 }
1224
1225         } else if ( op->o_conn &&
1226                 ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) )
1227                         || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) )
1228         {
1229                 send_ldap_result( op, rs );
1230         }
1231         if ( matched ) {
1232                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1233         }
1234         if ( text ) {
1235                 ldap_memfree( text );
1236         }
1237         if ( rs->sr_ref ) {
1238                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1239                 rs->sr_ref = NULL;
1240         }
1241         if ( refs ) {
1242                 ber_memvfree( (void **)refs );
1243         }
1244         if ( ctrls ) {
1245                 assert( rs->sr_ctrls != NULL );
1246                 ldap_controls_free( ctrls );
1247         }
1248
1249         rs->sr_text = save_text;
1250         rs->sr_matched = save_matched;
1251         rs->sr_ref = save_ref;
1252         rs->sr_ctrls = save_ctrls;
1253
1254         return( LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1255 }
1256
1257 /*
1258  * meta_back_proxy_authz_cred()
1259  *
1260  * prepares credentials & method for meta_back_proxy_authz_bind();
1261  * or, if method is SASL, performs the SASL bind directly.
1262  */
1263 int
1264 meta_back_proxy_authz_cred(
1265         metaconn_t              *mc,
1266         int                     candidate,
1267         Operation               *op,
1268         SlapReply               *rs,
1269         ldap_back_send_t        sendok,
1270         struct berval           *binddn,
1271         struct berval           *bindcred,
1272         int                     *method )
1273 {
1274         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1275         metatarget_t            *mt = mi->mi_targets[ candidate ];
1276         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1277         struct berval           ndn;
1278         int                     dobind = 0;
1279
1280         /* don't proxyAuthz if protocol is not LDAPv3 */
1281         switch ( mt->mt_version ) {
1282         case LDAP_VERSION3:
1283                 break;
1284
1285         case 0:
1286                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1287                         break;
1288                 }
1289                 /* fall thru */
1290
1291         default:
1292                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1293                 if ( sendok & LDAP_BACK_SENDERR ) {
1294                         send_ldap_result( op, rs );
1295                 }
1296                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1297                 goto done;
1298         }
1299
1300         if ( op->o_tag == LDAP_REQ_BIND ) {
1301                 ndn = op->o_req_ndn;
1302
1303         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1304                 ndn = op->o_conn->c_ndn;
1305
1306         } else {
1307                 ndn = op->o_ndn;
1308         }
1309
1310         /*
1311          * FIXME: we need to let clients use proxyAuthz
1312          * otherwise we cannot do symmetric pools of servers;
1313          * we have to live with the fact that a user can
1314          * authorize itself as any ID that is allowed
1315          * by the authzTo directive of the "proxyauthzdn".
1316          */
1317         /*
1318          * NOTE: current Proxy Authorization specification
1319          * and implementation do not allow proxy authorization
1320          * control to be provided with Bind requests
1321          */
1322         /*
1323          * if no bind took place yet, but the connection is bound
1324          * and the "proxyauthzdn" is set, then bind as
1325          * "proxyauthzdn" and explicitly add the proxyAuthz
1326          * control to every operation with the dn bound
1327          * to the connection as control value.
1328          */
1329
1330         /* bind as proxyauthzdn only if no idassert mode
1331          * is requested, or if the client's identity
1332          * is authorized */
1333         switch ( mt->mt_idassert_mode ) {
1334         case LDAP_BACK_IDASSERT_LEGACY:
1335                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1336                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1337                         {
1338                                 *binddn = mt->mt_idassert_authcDN;
1339                                 *bindcred = mt->mt_idassert_passwd;
1340                                 dobind = 1;
1341                         }
1342                 }
1343                 break;
1344
1345         default:
1346                 /* NOTE: rootdn can always idassert */
1347                 if ( BER_BVISNULL( &ndn )
1348                         && mt->mt_idassert_authz == NULL
1349                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1350                 {
1351                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1352                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1353                                 if ( sendok & LDAP_BACK_SENDERR ) {
1354                                         send_ldap_result( op, rs );
1355                                 }
1356                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1357                                 goto done;
1358
1359                         }
1360
1361                         rs->sr_err = LDAP_SUCCESS;
1362                         *binddn = slap_empty_bv;
1363                         *bindcred = slap_empty_bv;
1364                         break;
1365
1366                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1367                         struct berval authcDN;
1368
1369                         if ( BER_BVISNULL( &ndn ) ) {
1370                                 authcDN = slap_empty_bv;
1371
1372                         } else {
1373                                 authcDN = ndn;
1374                         }
1375                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1376                                         &authcDN, &authcDN );
1377                         if ( rs->sr_err != LDAP_SUCCESS ) {
1378                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1379                                         if ( sendok & LDAP_BACK_SENDERR ) {
1380                                                 send_ldap_result( op, rs );
1381                                         }
1382                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1383                                         goto done;
1384                                 }
1385
1386                                 rs->sr_err = LDAP_SUCCESS;
1387                                 *binddn = slap_empty_bv;
1388                                 *bindcred = slap_empty_bv;
1389                                 break;
1390                         }
1391                 }
1392
1393                 *binddn = mt->mt_idassert_authcDN;
1394                 *bindcred = mt->mt_idassert_passwd;
1395                 dobind = 1;
1396                 break;
1397         }
1398
1399         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1400 #ifdef HAVE_CYRUS_SASL
1401                 void            *defaults = NULL;
1402                 struct berval   authzID = BER_BVNULL;
1403                 int             freeauthz = 0;
1404
1405                 /* if SASL supports native authz, prepare for it */
1406                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1407                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1408                 {
1409                         switch ( mt->mt_idassert_mode ) {
1410                         case LDAP_BACK_IDASSERT_OTHERID:
1411                         case LDAP_BACK_IDASSERT_OTHERDN:
1412                                 authzID = mt->mt_idassert_authzID;
1413                                 break;
1414
1415                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1416                                 BER_BVSTR( &authzID, "dn:" );
1417                                 break;
1418
1419                         case LDAP_BACK_IDASSERT_SELF:
1420                                 if ( BER_BVISNULL( &ndn ) ) {
1421                                         /* connection is not authc'd, so don't idassert */
1422                                         BER_BVSTR( &authzID, "dn:" );
1423                                         break;
1424                                 }
1425                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1426                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1427                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1428                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1429                                                 ndn.bv_val, ndn.bv_len + 1 );
1430                                 freeauthz = 1;
1431                                 break;
1432
1433                         default:
1434                                 break;
1435                         }
1436                 }
1437
1438                 if ( mt->mt_idassert_secprops != NULL ) {
1439                         rs->sr_err = ldap_set_option( msc->msc_ld,
1440                                 LDAP_OPT_X_SASL_SECPROPS,
1441                                 (void *)mt->mt_idassert_secprops );
1442
1443                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1444                                 rs->sr_err = LDAP_OTHER;
1445                                 if ( sendok & LDAP_BACK_SENDERR ) {
1446                                         send_ldap_result( op, rs );
1447                                 }
1448                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1449                                 goto done;
1450                         }
1451                 }
1452
1453                 defaults = lutil_sasl_defaults( msc->msc_ld,
1454                                 mt->mt_idassert_sasl_mech.bv_val,
1455                                 mt->mt_idassert_sasl_realm.bv_val,
1456                                 mt->mt_idassert_authcID.bv_val,
1457                                 mt->mt_idassert_passwd.bv_val,
1458                                 authzID.bv_val );
1459                 if ( defaults == NULL ) {
1460                         rs->sr_err = LDAP_OTHER;
1461                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1462                         if ( sendok & LDAP_BACK_SENDERR ) {
1463                                 send_ldap_result( op, rs );
1464                         }
1465                         goto done;
1466                 }
1467
1468                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1469                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1470                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1471                                 defaults );
1472
1473                 rs->sr_err = slap_map_api2result( rs );
1474                 if ( rs->sr_err != LDAP_SUCCESS ) {
1475                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1476                         if ( sendok & LDAP_BACK_SENDERR ) {
1477                                 send_ldap_result( op, rs );
1478                         }
1479
1480                 } else {
1481                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1482                 }
1483
1484                 lutil_sasl_freedefs( defaults );
1485                 if ( freeauthz ) {
1486                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1487                 }
1488
1489                 goto done;
1490 #endif /* HAVE_CYRUS_SASL */
1491         }
1492
1493         *method = mt->mt_idassert_authmethod;
1494         switch ( mt->mt_idassert_authmethod ) {
1495         case LDAP_AUTH_NONE:
1496                 BER_BVSTR( binddn, "" );
1497                 BER_BVSTR( bindcred, "" );
1498                 /* fallthru */
1499
1500         case LDAP_AUTH_SIMPLE:
1501                 break;
1502
1503         default:
1504                 /* unsupported! */
1505                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1506                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1507                 if ( sendok & LDAP_BACK_SENDERR ) {
1508                         send_ldap_result( op, rs );
1509                 }
1510                 break;
1511         }
1512
1513 done:;
1514         return rs->sr_err;
1515 }
1516
1517 static int
1518 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1519 {
1520         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1521         metatarget_t            *mt = mi->mi_targets[ candidate ];
1522         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1523         struct berval           binddn = BER_BVC( "" ),
1524                                 cred = BER_BVC( "" );
1525         int                     method = LDAP_AUTH_NONE,
1526                                 rc;
1527
1528         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1529         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1530                 int     msgid;
1531
1532                 switch ( method ) {
1533                 case LDAP_AUTH_NONE:
1534                 case LDAP_AUTH_SIMPLE:
1535                         for (;;) {
1536                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1537                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1538                                         &cred, NULL, NULL, &msgid );
1539                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1540                                         break;
1541                                 }
1542                                 ldap_pvt_thread_yield();
1543                         }
1544                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1545                         if ( rc == LDAP_SUCCESS ) {
1546                                 /* set rebind stuff in case of successful proxyAuthz bind,
1547                                  * so that referral chasing is attempted using the right
1548                                  * identity */
1549                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1550                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1551
1552                                 if ( META_BACK_TGT_SAVECRED( mt ) ) {
1553                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1554                                                 memset( msc->msc_cred.bv_val, 0,
1555                                                         msc->msc_cred.bv_len );
1556                                         }
1557                                         ber_bvreplace( &msc->msc_cred, &cred );
1558                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1559                                 }
1560                         }
1561                         break;
1562
1563                 default:
1564                         assert( 0 );
1565                         break;
1566                 }
1567         }
1568
1569         return LDAP_BACK_CONN_ISBOUND( msc );
1570 }
1571
1572 /*
1573  * Add controls;
1574  *
1575  * if any needs to be added, it is prepended to existing ones,
1576  * in a newly allocated array.  The companion function
1577  * mi->mi_ldap_extra->controls_free() must be used to restore the original
1578  * status of op->o_ctrls.
1579  */
1580 int
1581 meta_back_controls_add(
1582                 Operation       *op,
1583                 SlapReply       *rs,
1584                 metaconn_t      *mc,
1585                 int             candidate,
1586                 LDAPControl     ***pctrls )
1587 {
1588         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1589         metatarget_t            *mt = mi->mi_targets[ candidate ];
1590         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1591
1592         LDAPControl             **ctrls = NULL;
1593         /* set to the maximum number of controls this backend can add */
1594         LDAPControl             c[ 2 ] = {{ 0 }};
1595         int                     n = 0, i, j1 = 0, j2 = 0;
1596
1597         *pctrls = NULL;
1598
1599         rs->sr_err = LDAP_SUCCESS;
1600
1601         /* don't add controls if protocol is not LDAPv3 */
1602         switch ( mt->mt_version ) {
1603         case LDAP_VERSION3:
1604                 break;
1605
1606         case 0:
1607                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1608                         break;
1609                 }
1610                 /* fall thru */
1611
1612         default:
1613                 goto done;
1614         }
1615
1616         /* put controls that go __before__ existing ones here */
1617
1618         /* proxyAuthz for identity assertion */
1619         switch ( mi->mi_ldap_extra->proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
1620                 mt->mt_version, &mt->mt_idassert, &c[ j1 ] ) )
1621         {
1622         case SLAP_CB_CONTINUE:
1623                 break;
1624
1625         case LDAP_SUCCESS:
1626                 j1++;
1627                 break;
1628
1629         default:
1630                 goto done;
1631         }
1632
1633         /* put controls that go __after__ existing ones here */
1634
1635 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1636         /* session tracking */
1637         if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
1638                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
1639                 case SLAP_CB_CONTINUE:
1640                         break;
1641
1642                 case LDAP_SUCCESS:
1643                         j2++;
1644                         break;
1645
1646                 default:
1647                         goto done;
1648                 }
1649         }
1650 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
1651
1652         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
1653                 rs->sr_err = LDAP_SUCCESS;
1654         }
1655
1656         /* if nothing to do, just bail out */
1657         if ( j1 == 0 && j2 == 0 ) {
1658                 goto done;
1659         }
1660
1661         assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
1662
1663         if ( op->o_ctrls ) {
1664                 for ( n = 0; op->o_ctrls[ n ]; n++ )
1665                         /* just count ctrls */ ;
1666         }
1667
1668         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
1669                         op->o_tmpmemctx );
1670         if ( j1 ) {
1671                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
1672                 *ctrls[ 0 ] = c[ 0 ];
1673                 for ( i = 1; i < j1; i++ ) {
1674                         ctrls[ i ] = &ctrls[ 0 ][ i ];
1675                         *ctrls[ i ] = c[ i ];
1676                 }
1677         }
1678
1679         i = 0;
1680         if ( op->o_ctrls ) {
1681                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1682                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
1683                 }
1684         }
1685
1686         n += j1;
1687         if ( j2 ) {
1688                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
1689                 *ctrls[ n ] = c[ j1 ];
1690                 for ( i = 1; i < j2; i++ ) {
1691                         ctrls[ n + i ] = &ctrls[ n ][ i ];
1692                         *ctrls[ n + i ] = c[ i ];
1693                 }
1694         }
1695
1696         ctrls[ n + j2 ] = NULL;
1697
1698 done:;
1699         if ( ctrls == NULL ) {
1700                 ctrls = op->o_ctrls;
1701         }
1702
1703         *pctrls = ctrls;
1704
1705         return rs->sr_err;
1706 }
1707