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 1999-2015 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
  37 #include "lutil_ldap.h"
  38
  39 static int
  40 meta_back_proxy_authz_bind(
  41         metaconn_t              *mc,
  42         int                     candidate,
  43         Operation               *op,
  44         SlapReply               *rs,
  45         ldap_back_send_t        sendok,
  46         int                     dolock );
  47
  48 static int
  49 meta_back_single_bind(
  50         Operation               *op,
  51         SlapReply               *rs,
  52         metaconn_t              *mc,
  53         int                     candidate );
  54
  55 int
  56 meta_back_bind( Operation *op, SlapReply *rs )
  57 {
  58         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  59         metaconn_t      *mc = NULL;
  60
  61         int             rc = LDAP_OTHER,
  62                         i,
  63                         gotit = 0,
  64                         isroot = 0;
  65
  66         SlapReply       *candidates;
  67
  68         rs->sr_err = LDAP_SUCCESS;
  69
  70         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  71                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  72
  73         /* the test on the bind method should be superfluous */
  74         switch ( be_rootdn_bind( op, rs ) ) {
  75         case LDAP_SUCCESS:
  76                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  77                         /* frontend will return success */
  78                         return rs->sr_err;
  79                 }
  80
  81                 isroot = 1;
  82                 /* fallthru */
  83
  84         case SLAP_CB_CONTINUE:
  85                 break;
  86
  87         default:
  88                 /* be_rootdn_bind() sent result */
  89                 return rs->sr_err;
  90         }
  91
  92         /* we need meta_back_getconn() not send result even on error,
  93          * because we want to intercept the error and make it
  94          * invalidCredentials */
  95         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
  96         if ( !mc ) {
  97                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
  98                         char    buf[ SLAP_TEXT_BUFLEN ];
  99
 100                         snprintf( buf, sizeof( buf ),
 101                                 "meta_back_bind: no target "
 102                                 "for dn \"%s\" (%d%s%s).",
 103                                 op->o_req_dn.bv_val, rs->sr_err,
 104                                 rs->sr_text ? ". " : "",
 105                                 rs->sr_text ? rs->sr_text : "" );
 106                         Debug( LDAP_DEBUG_ANY,
 107                                 "%s %s\n",
 108                                 op->o_log_prefix, buf, 0 );
 109                 }
 110
 111                 /* FIXME: there might be cases where we don't want
 112                  * to map the error onto invalidCredentials */
 113                 switch ( rs->sr_err ) {
 114                 case LDAP_NO_SUCH_OBJECT:
 115                 case LDAP_UNWILLING_TO_PERFORM:
 116                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 117                         rs->sr_text = NULL;
 118                         break;
 119                 }
 120                 send_ldap_result( op, rs );
 121                 return rs->sr_err;
 122         }
 123
 124         candidates = meta_back_candidates_get( op );
 125
 126         /*
 127          * Each target is scanned ...
 128          */
 129         mc->mc_authz_target = META_BOUND_NONE;
 130         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 131                 metatarget_t    *mt = mi->mi_targets[ i ];
 132                 int             lerr;
 133
 134                 /*
 135                  * Skip non-candidates
 136                  */
 137                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 138                         continue;
 139                 }
 140
 141                 if ( gotit == 0 ) {
 142                         /* set rc to LDAP_SUCCESS only if at least
 143                          * one candidate has been tried */
 144                         rc = LDAP_SUCCESS;
 145                         gotit = 1;
 146
 147                 } else if ( !isroot ) {
 148                         /*
 149                          * A bind operation is expected to have
 150                          * ONE CANDIDATE ONLY!
 151                          */
 152                         Debug( LDAP_DEBUG_ANY,
 153                                 "### %s meta_back_bind: more than one"
 154                                 " candidate selected...\n",
 155                                 op->o_log_prefix, 0, 0 );
 156                 }
 157
 158                 if ( isroot ) {
 159                         if ( mt->mt_idassert_authmethod == LDAP_AUTH_NONE
 160                                 || BER_BVISNULL( &mt->mt_idassert_authcDN ) )
 161                         {
 162                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 163
 164                                 /* skip the target if no pseudorootdn is provided */
 165                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 166                                         ch_free( msc->msc_bound_ndn.bv_val );
 167                                         BER_BVZERO( &msc->msc_bound_ndn );
 168                                 }
 169
 170                                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 171                                         /* destroy sensitive data */
 172                                         memset( msc->msc_cred.bv_val, 0,
 173                                                 msc->msc_cred.bv_len );
 174                                         ch_free( msc->msc_cred.bv_val );
 175                                         BER_BVZERO( &msc->msc_cred );
 176                                 }
 177
 178                                 continue;
 179                         }
 180
 181
 182                         (void)meta_back_proxy_authz_bind( mc, i, op, rs, LDAP_BACK_DONTSEND, 1 );
 183                         lerr = rs->sr_err;
 184
 185                 } else {
 186                         lerr = meta_back_single_bind( op, rs, mc, i );
 187                 }
 188
 189                 if ( lerr != LDAP_SUCCESS ) {
 190                         rc = rs->sr_err = lerr;
 191
 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                 }
 206
 207                 if ( !LDAP_BACK_PCONN_ISPRIV( mc )
 208                         && !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) )
 209                 {
 210                         int             lerr;
 211
 212                         /* wait for all other ops to release the connection */
 213                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 214                         assert( mc->mc_refcnt == 1 );
 215 #if META_BACK_PRINT_CONNTREE > 0
 216                         meta_back_print_conntree( mi, ">>> meta_back_bind" );
 217 #endif /* META_BACK_PRINT_CONNTREE */
 218
 219                         /* delete all cached connections with the current connection */
 220                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 221                                 metaconn_t      *tmpmc;
 222
 223                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 224                                 {
 225                                         assert( !LDAP_BACK_PCONN_ISPRIV( mc ) );
 226                                         Debug( LDAP_DEBUG_TRACE,
 227                                                 "=>meta_back_bind: destroying conn %lu (refcnt=%u)\n",
 228                                                 mc->mc_conn->c_connid, mc->mc_refcnt, 0 );
 229
 230                                         if ( tmpmc->mc_refcnt != 0 ) {
 231                                                 /* taint it */
 232                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 233
 234                                         } else {
 235                                                 /*
 236                                                  * Needs a test because the handler may be corrupted,
 237                                                  * and calling ldap_unbind on a corrupted header results
 238                                                  * in a segmentation fault
 239                                                  */
 240                                                 meta_back_conn_free( tmpmc );
 241                                         }
 242                                 }
 243                         }
 244
 245                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 246                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 247                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 248 #if META_BACK_PRINT_CONNTREE > 0
 249                         meta_back_print_conntree( mi, "<<< meta_back_bind" );
 250 #endif /* META_BACK_PRINT_CONNTREE */
 251                         if ( lerr == 0 ) {
 252 #if 0
 253                                 /* NOTE: a connection cannot be privileged
 254                                  * and be in the avl tree at the same time
 255                                  */
 256                                 if ( isroot ) {
 257                                         LDAP_BACK_CONN_ISPRIV_SET( mc );
 258                                         LDAP_BACK_PCONN_SET( mc, op );
 259                                 }
 260 #endif
 261                                 LDAP_BACK_CONN_CACHED_SET( mc );
 262
 263                         } else {
 264                                 LDAP_BACK_CONN_CACHED_CLEAR( mc );
 265                         }
 266                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 267                 }
 268         }
 269
 270         if ( mc != NULL ) {
 271                 meta_back_release_conn( mi, mc );
 272         }
 273
 274         /*
 275          * rc is LDAP_SUCCESS if at least one bind succeeded,
 276          * err is the last error that occurred during a bind;
 277          * if at least (and at most?) one bind succeeds, fine.
 278          */
 279         if ( rc != LDAP_SUCCESS ) {
 280
 281                 /*
 282                  * deal with bind failure ...
 283                  */
 284
 285                 /*
 286                  * no target was found within the naming context,
 287                  * so bind must fail with invalid credentials
 288                  */
 289                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 290                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 291                 } else {
 292                         rs->sr_err = slap_map_api2result( rs );
 293                 }
 294                 send_ldap_result( op, rs );
 295                 return rs->sr_err;
 296
 297         }
 298
 299         return LDAP_SUCCESS;
 300 }
 301
 302 static int
 303 meta_back_bind_op_result(
 304         Operation               *op,
 305         SlapReply               *rs,
 306         metaconn_t              *mc,
 307         int                     candidate,
 308         int                     msgid,
 309         ldap_back_send_t        sendok,
 310         int                     dolock )
 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                         if ( dolock) {
 390                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 391                         }
 392                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 393
 394 #ifdef DEBUG_205
 395                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 396                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 397 #endif /* DEBUG_205 */
 398
 399                         meta_clear_one_candidate( op, mc, candidate );
 400                         if ( dolock ) {
 401                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 402                         }
 403
 404                         rs->sr_err = timeout_err;
 405                         rs->sr_text = timeout_text;
 406                         break;
 407
 408                 case -1:
 409                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 410                                 &rs->sr_err );
 411
 412                         snprintf( buf, sizeof( buf ),
 413                                 "err=%d (%s) nretries=%d",
 414                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 415                         Debug( LDAP_DEBUG_ANY,
 416                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 417                                 op->o_log_prefix, candidate, buf );
 418                         break;
 419
 420                 default:
 421                         /* only touch when activity actually took place... */
 422                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 423                                 msc->msc_time = op->o_time;
 424                         }
 425
 426                         /* FIXME: matched? referrals? response controls? */
 427                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 428                                         NULL, NULL, NULL, NULL, 1 );
 429                         if ( rc != LDAP_SUCCESS ) {
 430                                 rs->sr_err = rc;
 431                         }
 432                         rs->sr_err = slap_map_api2result( rs );
 433                         break;
 434                 }
 435         }
 436
 437         rs->sr_err = slap_map_api2result( rs );
 438
 439         Debug( LDAP_DEBUG_TRACE,
 440                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 441                 op->o_log_prefix, candidate, rs->sr_err );
 442
 443         return rs->sr_err;
 444 }
 445
 446 /*
 447  * meta_back_single_bind
 448  *
 449  * attempts to perform a bind with creds
 450  */
 451 static int
 452 meta_back_single_bind(
 453         Operation               *op,
 454         SlapReply               *rs,
 455         metaconn_t              *mc,
 456         int                     candidate )
 457 {
 458         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 459         metatarget_t            *mt = mi->mi_targets[ candidate ];
 460         struct berval           mdn = BER_BVNULL;
 461         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 462         int                     msgid;
 463         dncookie                dc;
 464         struct berval           save_o_dn;
 465         int                     save_o_do_not_cache;
 466         LDAPControl             **ctrls = NULL;
 467
 468         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 469                 ch_free( msc->msc_bound_ndn.bv_val );
 470                 BER_BVZERO( &msc->msc_bound_ndn );
 471         }
 472
 473         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 474                 /* destroy sensitive data */
 475                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 476                 ch_free( msc->msc_cred.bv_val );
 477                 BER_BVZERO( &msc->msc_cred );
 478         }
 479
 480         /*
 481          * Rewrite the bind dn if needed
 482          */
 483         dc.target = mt;
 484         dc.conn = op->o_conn;
 485         dc.rs = rs;
 486         dc.ctx = "bindDN";
 487
 488         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 489                 rs->sr_text = "DN rewrite error";
 490                 rs->sr_err = LDAP_OTHER;
 491                 return rs->sr_err;
 492         }
 493
 494         /* don't add proxyAuthz; set the bindDN */
 495         save_o_dn = op->o_dn;
 496         save_o_do_not_cache = op->o_do_not_cache;
 497         op->o_do_not_cache = 1;
 498         op->o_dn = op->o_req_dn;
 499
 500         ctrls = op->o_ctrls;
 501         rs->sr_err = meta_back_controls_add( op, rs, mc, candidate, &ctrls );
 502         op->o_dn = save_o_dn;
 503         op->o_do_not_cache = save_o_do_not_cache;
 504         if ( rs->sr_err != LDAP_SUCCESS ) {
 505                 goto return_results;
 506         }
 507
 508         /* FIXME: this fixes the bind problem right now; we need
 509          * to use the asynchronous version to get the "matched"
 510          * and more in case of failure ... */
 511         /* FIXME: should we check if at least some of the op->o_ctrls
 512          * can/should be passed? */
 513         for (;;) {
 514                 rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 515                         LDAP_SASL_SIMPLE, &op->orb_cred,
 516                         ctrls, NULL, &msgid );
 517                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
 518                         break;
 519                 }
 520                 ldap_pvt_thread_yield();
 521         }
 522
 523         mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
 524
 525         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND, 1 );
 526         if ( rs->sr_err != LDAP_SUCCESS ) {
 527                 goto return_results;
 528         }
 529
 530         /* If defined, proxyAuthz will be used also when
 531          * back-ldap is the authorizing backend; for this
 532          * purpose, a successful bind is followed by a
 533          * bind with the configured identity assertion */
 534         /* NOTE: use with care */
 535         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 536                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR, 1 );
 537                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 538                         goto return_results;
 539                 }
 540                 goto cache_refresh;
 541         }
 542
 543         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 544         LDAP_BACK_CONN_ISBOUND_SET( msc );
 545         mc->mc_authz_target = candidate;
 546
 547         if ( META_BACK_TGT_SAVECRED( mt ) ) {
 548                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 549                         memset( msc->msc_cred.bv_val, 0,
 550                                 msc->msc_cred.bv_len );
 551                 }
 552                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 553                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 554         }
 555
 556 cache_refresh:;
 557         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 558                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 559         {
 560                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 561                                 &op->o_req_ndn, candidate );
 562         }
 563
 564 return_results:;
 565         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 566                 free( mdn.bv_val );
 567         }
 568
 569         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 570                 meta_back_quarantine( op, rs, candidate );
 571         }
 572
 573         return rs->sr_err;
 574 }
 575
 576 /*
 577  * meta_back_single_dobind
 578  */
 579 int
 580 meta_back_single_dobind(
 581         Operation               *op,
 582         SlapReply               *rs,
 583         metaconn_t              **mcp,
 584         int                     candidate,
 585         ldap_back_send_t        sendok,
 586         int                     nretries,
 587         int                     dolock )
 588 {
 589         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 590         metatarget_t            *mt = mi->mi_targets[ candidate ];
 591         metaconn_t              *mc = *mcp;
 592         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 593         int                     msgid;
 594
 595         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 596
 597         /* NOTE: this obsoletes pseudorootdn */
 598         if ( op->o_conn != NULL &&
 599                 !op->o_do_not_cache &&
 600                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 601                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 602                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 603                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 604         {
 605                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok, dolock );
 606
 607         } else {
 608                 char *binddn = "";
 609                 struct berval cred = BER_BVC( "" );
 610
 611                 /* use credentials if available */
 612                 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
 613                         && !BER_BVISNULL( &msc->msc_cred ) )
 614                 {
 615                         binddn = msc->msc_bound_ndn.bv_val;
 616                         cred = msc->msc_cred;
 617                 }
 618
 619                 /* FIXME: should we check if at least some of the op->o_ctrls
 620                  * can/should be passed? */
 621                 if(!dolock) {
 622                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 623                 }
 624
 625                 for (;;) {
 626                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 627                                 binddn, LDAP_SASL_SIMPLE, &cred,
 628                                 NULL, NULL, &msgid );
 629                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 630                                 break;
 631                         }
 632                         ldap_pvt_thread_yield();
 633                 }
 634
 635                 if(!dolock) {
 636                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 637                 }
 638
 639                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok, dolock );
 640
 641                 /* if bind succeeded, but anonymous, clear msc_bound_ndn */
 642                 if ( rs->sr_err != LDAP_SUCCESS || binddn[0] == '\0' ) {
 643                         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 644                                 ber_memfree( msc->msc_bound_ndn.bv_val );
 645                                 BER_BVZERO( &msc->msc_bound_ndn );
 646                         }
 647
 648                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 649                                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 650                                 ber_memfree( msc->msc_cred.bv_val );
 651                                 BER_BVZERO( &msc->msc_cred );
 652                         }
 653                 }
 654         }
 655
 656         if ( rs->sr_err != LDAP_SUCCESS ) {
 657                 if ( dolock ) {
 658                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 659                 }
 660                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 661                 if ( META_BACK_ONERR_STOP( mi ) ) {
 662                         LDAP_BACK_CONN_TAINTED_SET( mc );
 663                         meta_back_release_conn_lock( mi, mc, 0 );
 664                         *mcp = NULL;
 665                 }
 666                 if ( dolock ) {
 667                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 668                 }
 669         }
 670
 671         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 672                 meta_back_quarantine( op, rs, candidate );
 673         }
 674
 675         return rs->sr_err;
 676 }
 677
 678 /*
 679  * meta_back_dobind
 680  */
 681 int
 682 meta_back_dobind(
 683         Operation               *op,
 684         SlapReply               *rs,
 685         metaconn_t              *mc,
 686         ldap_back_send_t        sendok )
 687 {
 688         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 689
 690         int                     bound = 0,
 691                                 i,
 692                                 isroot = 0;
 693
 694         SlapReply               *candidates;
 695
 696         if ( be_isroot( op ) ) {
 697                 isroot = 1;
 698         }
 699
 700         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 701                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 702                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 703
 704                 Debug( LDAP_DEBUG_TRACE,
 705                         "%s meta_back_dobind: conn=%s%s\n",
 706                         op->o_log_prefix, buf,
 707                         isroot ? " (isroot)" : "" );
 708         }
 709
 710         /*
 711          * all the targets are bound as pseudoroot
 712          */
 713         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 714                 bound = 1;
 715                 goto done;
 716         }
 717
 718         candidates = meta_back_candidates_get( op );
 719
 720         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 721                 metatarget_t            *mt = mi->mi_targets[ i ];
 722                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 723                 int                     rc;
 724
 725                 /*
 726                  * Not a candidate
 727                  */
 728                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 729                         continue;
 730                 }
 731
 732                 assert( msc->msc_ld != NULL );
 733
 734                 /*
 735                  * If the target is already bound it is skipped
 736                  */
 737
 738 retry_binding:;
 739                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 740                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 741                         || ( LDAP_BACK_CONN_ISANON( msc )
 742                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 743                 {
 744                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 745                         ++bound;
 746                         continue;
 747
 748                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 749                 {
 750                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 751                         ldap_pvt_thread_yield();
 752                         goto retry_binding;
 753
 754                 }
 755
 756                 LDAP_BACK_CONN_BINDING_SET( msc );
 757                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 758
 759                 rc = meta_back_single_dobind( op, rs, &mc, i,
 760                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 761                 /*
 762                  * NOTE: meta_back_single_dobind() already retries;
 763                  * in case of failure, it resets mc...
 764                  */
 765                 if ( rc != LDAP_SUCCESS ) {
 766                         char            buf[ SLAP_TEXT_BUFLEN ];
 767
 768                         if ( mc == NULL ) {
 769                                 /* meta_back_single_dobind() already sent
 770                                  * response and released connection */
 771                                 goto send_err;
 772                         }
 773
 774
 775                         if ( rc == LDAP_UNAVAILABLE ) {
 776                                 /* FIXME: meta_back_retry() already re-calls
 777                                  * meta_back_single_dobind() */
 778                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 779                                         goto retry_ok;
 780                                 }
 781
 782                                 if ( mc != NULL ) {
 783                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 784                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 785                                         meta_back_release_conn_lock( mi, mc, 0 );
 786                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 787                                 }
 788
 789                                 return 0;
 790                         }
 791
 792                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 793                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 794                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 795
 796                         snprintf( buf, sizeof( buf ),
 797                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 798                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 799                                 rc, ldap_err2string( rc ) );
 800                         Debug( LDAP_DEBUG_ANY,
 801                                 "%s %s\n",
 802                                 op->o_log_prefix, buf, 0 );
 803
 804                         /*
 805                          * null cred bind should always succeed
 806                          * as anonymous, so a failure means
 807                          * the target is no longer candidate possibly
 808                          * due to technical reasons (remote host down?)
 809                          * so better clear the handle
 810                          */
 811                         /* leave the target candidate, but record the error for later use */
 812                         candidates[ i ].sr_err = rc;
 813                         if ( META_BACK_ONERR_STOP( mi ) ) {
 814                                 bound = 0;
 815                                 goto done;
 816                         }
 817
 818                         continue;
 819                 } /* else */
 820
 821 retry_ok:;
 822                 Debug( LDAP_DEBUG_TRACE,
 823                         "%s meta_back_dobind[%d]: "
 824                         "(%s)\n",
 825                         op->o_log_prefix, i,
 826                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 827
 828                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 829                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 830                 if ( isroot ) {
 831                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 832                 } else {
 833                         LDAP_BACK_CONN_ISANON_SET( msc );
 834                 }
 835                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 836                 ++bound;
 837         }
 838
 839 done:;
 840         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 841                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 842                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 843
 844                 Debug( LDAP_DEBUG_TRACE,
 845                         "%s meta_back_dobind: conn=%s bound=%d\n",
 846                         op->o_log_prefix, buf, bound );
 847         }
 848
 849         if ( bound == 0 ) {
 850                 meta_back_release_conn( mi, mc );
 851
 852 send_err:;
 853                 if ( sendok & LDAP_BACK_SENDERR ) {
 854                         if ( rs->sr_err == LDAP_SUCCESS ) {
 855                                 rs->sr_err = LDAP_BUSY;
 856                         }
 857                         send_ldap_result( op, rs );
 858                 }
 859
 860                 return 0;
 861         }
 862
 863         return ( bound > 0 );
 864 }
 865
 866 /*
 867  * meta_back_default_rebind
 868  *
 869  * This is a callback used for chasing referrals using the same
 870  * credentials as the original user on this session.
 871  */
 872 int
 873 meta_back_default_rebind(
 874         LDAP                    *ld,
 875         LDAP_CONST char         *url,
 876         ber_tag_t               request,
 877         ber_int_t               msgid,
 878         void                    *params )
 879 {
 880         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 881
 882         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 883                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 884                         NULL, NULL, NULL );
 885 }
 886
 887 /*
 888  * meta_back_default_urllist
 889  *
 890  * This is a callback used for mucking with the urllist
 891  */
 892 int
 893 meta_back_default_urllist(
 894         LDAP            *ld,
 895         LDAPURLDesc     **urllist,
 896         LDAPURLDesc     **url,
 897         void            *params )
 898 {
 899         metatarget_t    *mt = (metatarget_t *)params;
 900         LDAPURLDesc     **urltail;
 901
 902         if ( urllist == url ) {
 903                 return LDAP_SUCCESS;
 904         }
 905
 906         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 907                 /* count */ ;
 908
 909         *urltail = *urllist;
 910         *urllist = *url;
 911         *url = NULL;
 912
 913         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 914         if ( mt->mt_uri ) {
 915                 ch_free( mt->mt_uri );
 916         }
 917
 918         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 919         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 920
 921         return LDAP_SUCCESS;
 922 }
 923
 924 int
 925 meta_back_cancel(
 926         metaconn_t              *mc,
 927         Operation               *op,
 928         SlapReply               *rs,
 929         ber_int_t               msgid,
 930         int                     candidate,
 931         ldap_back_send_t        sendok )
 932 {
 933         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 934
 935         metatarget_t            *mt = mi->mi_targets[ candidate ];
 936         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 937
 938         int                     rc = LDAP_OTHER;
 939
 940         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 941                 op->o_log_prefix, candidate, msgid );
 942
 943         /* default behavior */
 944         if ( META_BACK_TGT_ABANDON( mt ) ) {
 945                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 946
 947         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 948                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 949
 950         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 951                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 952
 953         } else {
 954                 assert( 0 );
 955         }
 956
 957         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 958                 op->o_log_prefix, candidate, rc );
 959
 960         return rc;
 961 }
 962
 963
 964
 965 /*
 966  * FIXME: error return must be handled in a cleaner way ...
 967  */
 968 int
 969 meta_back_op_result(
 970         metaconn_t              *mc,
 971         Operation               *op,
 972         SlapReply               *rs,
 973         int                     candidate,
 974         ber_int_t               msgid,
 975         time_t                  timeout,
 976         ldap_back_send_t        sendok )
 977 {
 978         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 979
 980         const char      *save_text = rs->sr_text,
 981                         *save_matched = rs->sr_matched;
 982         BerVarray       save_ref = rs->sr_ref;
 983         LDAPControl     **save_ctrls = rs->sr_ctrls;
 984         void            *matched_ctx = NULL;
 985
 986         char            *matched = NULL;
 987         char            *text = NULL;
 988         char            **refs = NULL;
 989         LDAPControl     **ctrls = NULL;
 990
 991         assert( mc != NULL );
 992
 993         rs->sr_text = NULL;
 994         rs->sr_matched = NULL;
 995         rs->sr_ref = NULL;
 996         rs->sr_ctrls = NULL;
 997
 998         if ( candidate != META_TARGET_NONE ) {
 999                 metatarget_t            *mt = mi->mi_targets[ candidate ];
1000                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1001
1002                 if ( LDAP_ERR_OK( rs->sr_err ) ) {
1003                         int             rc;
1004                         struct timeval  tv;
1005                         LDAPMessage     *res = NULL;
1006                         time_t          stoptime = (time_t)(-1);
1007                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
1008                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
1009                         const char      *timeout_text = "Operation timed out";
1010
1011                         /* if timeout is not specified, compute and use
1012                          * the one specific to the ongoing operation */
1013                         if ( timeout == (time_t)(-1) ) {
1014                                 slap_op_t       opidx = slap_req2op( op->o_tag );
1015
1016                                 if ( opidx == SLAP_OP_SEARCH ) {
1017                                         if ( op->ors_tlimit <= 0 ) {
1018                                                 timeout = 0;
1019
1020                                         } else {
1021                                                 timeout = op->ors_tlimit;
1022                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
1023                                                 timeout_text = NULL;
1024                                         }
1025
1026                                 } else {
1027                                         timeout = mt->mt_timeout[ opidx ];
1028                                 }
1029                         }
1030
1031                         /* better than nothing :) */
1032                         if ( timeout == 0 ) {
1033                                 if ( mi->mi_idle_timeout ) {
1034                                         timeout = mi->mi_idle_timeout;
1035
1036                                 } else if ( mi->mi_conn_ttl ) {
1037                                         timeout = mi->mi_conn_ttl;
1038                                 }
1039                         }
1040
1041                         if ( timeout ) {
1042                                 stoptime = op->o_time + timeout;
1043                         }
1044
1045                         LDAP_BACK_TV_SET( &tv );
1046
1047 retry:;
1048                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1049                         switch ( rc ) {
1050                         case 0:
1051                                 if ( timeout && slap_get_time() > stoptime ) {
1052                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
1053                                         rs->sr_err = timeout_err;
1054                                         rs->sr_text = timeout_text;
1055                                         break;
1056                                 }
1057
1058                                 LDAP_BACK_TV_SET( &tv );
1059                                 ldap_pvt_thread_yield();
1060                                 goto retry;
1061
1062                         case -1:
1063                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1064                                                 &rs->sr_err );
1065                                 break;
1066
1067
1068                         /* otherwise get the result; if it is not
1069                          * LDAP_SUCCESS, record it in the reply
1070                          * structure (this includes
1071                          * LDAP_COMPARE_{TRUE|FALSE}) */
1072                         default:
1073                                 /* only touch when activity actually took place... */
1074                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1075                                         msc->msc_time = op->o_time;
1076                                 }
1077
1078                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1079                                                 &matched, &text, &refs, &ctrls, 1 );
1080                                 res = NULL;
1081                                 if ( rc == LDAP_SUCCESS ) {
1082                                         rs->sr_text = text;
1083                                 } else {
1084                                         rs->sr_err = rc;
1085                                 }
1086                                 rs->sr_err = slap_map_api2result( rs );
1087
1088                                 /* RFC 4511: referrals can only appear
1089                                  * if result code is LDAP_REFERRAL */
1090                                 if ( refs != NULL
1091                                         && refs[ 0 ] != NULL
1092                                         && refs[ 0 ][ 0 ] != '\0' )
1093                                 {
1094                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1095                                                 Debug( LDAP_DEBUG_ANY,
1096                                                         "%s meta_back_op_result[%d]: "
1097                                                         "got referrals with err=%d\n",
1098                                                         op->o_log_prefix,
1099                                                         candidate, rs->sr_err );
1100
1101                                         } else {
1102                                                 int     i;
1103
1104                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1105                                                         /* count */ ;
1106                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1107                                                         op->o_tmpmemctx );
1108                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1109                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1110                                                 }
1111                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1112                                         }
1113
1114                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1115                                         Debug( LDAP_DEBUG_ANY,
1116                                                 "%s meta_back_op_result[%d]: "
1117                                                 "got err=%d with null "
1118                                                 "or empty referrals\n",
1119                                                 op->o_log_prefix,
1120                                                 candidate, rs->sr_err );
1121
1122                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1123                                 }
1124
1125                                 if ( ctrls != NULL ) {
1126                                         rs->sr_ctrls = ctrls;
1127                                 }
1128                         }
1129
1130                         assert( res == NULL );
1131                 }
1132
1133                 /* if the error in the reply structure is not
1134                  * LDAP_SUCCESS, try to map it from client
1135                  * to server error */
1136                 if ( !LDAP_ERR_OK( rs->sr_err ) ) {
1137                         rs->sr_err = slap_map_api2result( rs );
1138
1139                         /* internal ops ( op->o_conn == NULL )
1140                          * must not reply to client */
1141                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1142
1143                                 /* record the (massaged) matched
1144                                  * DN into the reply structure */
1145                                 rs->sr_matched = matched;
1146                         }
1147                 }
1148
1149                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1150                         meta_back_quarantine( op, rs, candidate );
1151                 }
1152
1153         } else {
1154                 int     i,
1155                         err = rs->sr_err;
1156
1157                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1158                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1159                         char                    *xtext = NULL;
1160                         char                    *xmatched = NULL;
1161
1162                         if ( msc->msc_ld == NULL ) {
1163                                 continue;
1164                         }
1165
1166                         rs->sr_err = LDAP_SUCCESS;
1167
1168                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1169                         if ( rs->sr_err != LDAP_SUCCESS ) {
1170                                 /*
1171                                  * better check the type of error. In some cases
1172                                  * (search ?) it might be better to return a
1173                                  * success if at least one of the targets gave
1174                                  * positive result ...
1175                                  */
1176                                 ldap_get_option( msc->msc_ld,
1177                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1178                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1179                                         ldap_memfree( xtext );
1180                                         xtext = NULL;
1181                                 }
1182
1183                                 ldap_get_option( msc->msc_ld,
1184                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1185                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1186                                         ldap_memfree( xmatched );
1187                                         xmatched = NULL;
1188                                 }
1189
1190                                 rs->sr_err = slap_map_api2result( rs );
1191
1192                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1193                                         char    buf[ SLAP_TEXT_BUFLEN ];
1194
1195                                         snprintf( buf, sizeof( buf ),
1196                                                 "meta_back_op_result[%d] "
1197                                                 "err=%d text=\"%s\" matched=\"%s\"",
1198                                                 i, rs->sr_err,
1199                                                 ( xtext ? xtext : "" ),
1200                                                 ( xmatched ? xmatched : "" ) );
1201                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1202                                                 op->o_log_prefix, buf, 0 );
1203                                 }
1204
1205                                 /*
1206                                  * FIXME: need to rewrite "match" (need rwinfo)
1207                                  */
1208                                 switch ( rs->sr_err ) {
1209                                 default:
1210                                         err = rs->sr_err;
1211                                         if ( xtext != NULL ) {
1212                                                 if ( text ) {
1213                                                         ldap_memfree( text );
1214                                                 }
1215                                                 text = xtext;
1216                                                 xtext = NULL;
1217                                         }
1218                                         if ( xmatched != NULL ) {
1219                                                 if ( matched ) {
1220                                                         ldap_memfree( matched );
1221                                                 }
1222                                                 matched = xmatched;
1223                                                 xmatched = NULL;
1224                                         }
1225                                         break;
1226                                 }
1227
1228                                 if ( xtext ) {
1229                                         ldap_memfree( xtext );
1230                                 }
1231
1232                                 if ( xmatched ) {
1233                                         ldap_memfree( xmatched );
1234                                 }
1235                         }
1236
1237                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1238                                 meta_back_quarantine( op, rs, i );
1239                         }
1240                 }
1241
1242                 if ( err != LDAP_SUCCESS ) {
1243                         rs->sr_err = err;
1244                 }
1245         }
1246
1247         if ( matched != NULL ) {
1248                 struct berval   dn, pdn;
1249
1250                 ber_str2bv( matched, 0, 0, &dn );
1251                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1252                         ldap_memfree( matched );
1253                         matched_ctx = op->o_tmpmemctx;
1254                         matched = pdn.bv_val;
1255                 }
1256                 rs->sr_matched = matched;
1257         }
1258
1259         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1260                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1261                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1262                                 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
1263                                 send_ldap_result( op, rs );
1264                         }
1265                 }
1266
1267         } else if ( op->o_conn &&
1268                 ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) )
1269                         || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) )
1270         {
1271                 send_ldap_result( op, rs );
1272         }
1273         if ( matched ) {
1274                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1275         }
1276         if ( text ) {
1277                 ldap_memfree( text );
1278         }
1279         if ( rs->sr_ref ) {
1280                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1281                 rs->sr_ref = NULL;
1282         }
1283         if ( refs ) {
1284                 ber_memvfree( (void **)refs );
1285         }
1286         if ( ctrls ) {
1287                 assert( rs->sr_ctrls != NULL );
1288                 ldap_controls_free( ctrls );
1289         }
1290
1291         rs->sr_text = save_text;
1292         rs->sr_matched = save_matched;
1293         rs->sr_ref = save_ref;
1294         rs->sr_ctrls = save_ctrls;
1295
1296         return( LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1297 }
1298
1299 /*
1300  * meta_back_proxy_authz_cred()
1301  *
1302  * prepares credentials & method for meta_back_proxy_authz_bind();
1303  * or, if method is SASL, performs the SASL bind directly.
1304  */
1305 int
1306 meta_back_proxy_authz_cred(
1307         metaconn_t              *mc,
1308         int                     candidate,
1309         Operation               *op,
1310         SlapReply               *rs,
1311         ldap_back_send_t        sendok,
1312         struct berval           *binddn,
1313         struct berval           *bindcred,
1314         int                     *method )
1315 {
1316         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1317         metatarget_t            *mt = mi->mi_targets[ candidate ];
1318         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1319         struct berval           ndn;
1320         int                     dobind = 0;
1321
1322         /* don't proxyAuthz if protocol is not LDAPv3 */
1323         switch ( mt->mt_version ) {
1324         case LDAP_VERSION3:
1325                 break;
1326
1327         case 0:
1328                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1329                         break;
1330                 }
1331                 /* fall thru */
1332
1333         default:
1334                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1335                 if ( sendok & LDAP_BACK_SENDERR ) {
1336                         send_ldap_result( op, rs );
1337                 }
1338                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1339                 goto done;
1340         }
1341
1342         if ( op->o_tag == LDAP_REQ_BIND ) {
1343                 ndn = op->o_req_ndn;
1344
1345         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1346                 ndn = op->o_conn->c_ndn;
1347
1348         } else {
1349                 ndn = op->o_ndn;
1350         }
1351         rs->sr_err = LDAP_SUCCESS;
1352
1353         /*
1354          * FIXME: we need to let clients use proxyAuthz
1355          * otherwise we cannot do symmetric pools of servers;
1356          * we have to live with the fact that a user can
1357          * authorize itself as any ID that is allowed
1358          * by the authzTo directive of the "proxyauthzdn".
1359          */
1360         /*
1361          * NOTE: current Proxy Authorization specification
1362          * and implementation do not allow proxy authorization
1363          * control to be provided with Bind requests
1364          */
1365         /*
1366          * if no bind took place yet, but the connection is bound
1367          * and the "proxyauthzdn" is set, then bind as
1368          * "proxyauthzdn" and explicitly add the proxyAuthz
1369          * control to every operation with the dn bound
1370          * to the connection as control value.
1371          */
1372
1373         /* bind as proxyauthzdn only if no idassert mode
1374          * is requested, or if the client's identity
1375          * is authorized */
1376         switch ( mt->mt_idassert_mode ) {
1377         case LDAP_BACK_IDASSERT_LEGACY:
1378                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1379                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1380                         {
1381                                 *binddn = mt->mt_idassert_authcDN;
1382                                 *bindcred = mt->mt_idassert_passwd;
1383                                 dobind = 1;
1384                         }
1385                 }
1386                 break;
1387
1388         default:
1389                 /* NOTE: rootdn can always idassert */
1390                 if ( BER_BVISNULL( &ndn )
1391                         && mt->mt_idassert_authz == NULL
1392                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1393                 {
1394                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1395                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1396                                 if ( sendok & LDAP_BACK_SENDERR ) {
1397                                         send_ldap_result( op, rs );
1398                                 }
1399                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1400                                 goto done;
1401
1402                         }
1403
1404                         rs->sr_err = LDAP_SUCCESS;
1405                         *binddn = slap_empty_bv;
1406                         *bindcred = slap_empty_bv;
1407                         break;
1408
1409                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1410                         struct berval authcDN;
1411
1412                         if ( BER_BVISNULL( &ndn ) ) {
1413                                 authcDN = slap_empty_bv;
1414
1415                         } else {
1416                                 authcDN = ndn;
1417                         }
1418                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1419                                         &authcDN, &authcDN );
1420                         if ( rs->sr_err != LDAP_SUCCESS ) {
1421                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1422                                         if ( sendok & LDAP_BACK_SENDERR ) {
1423                                                 send_ldap_result( op, rs );
1424                                         }
1425                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1426                                         goto done;
1427                                 }
1428
1429                                 rs->sr_err = LDAP_SUCCESS;
1430                                 *binddn = slap_empty_bv;
1431                                 *bindcred = slap_empty_bv;
1432                                 break;
1433                         }
1434                 }
1435
1436                 *binddn = mt->mt_idassert_authcDN;
1437                 *bindcred = mt->mt_idassert_passwd;
1438                 dobind = 1;
1439                 break;
1440         }
1441
1442         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1443 #ifdef HAVE_CYRUS_SASL
1444                 void            *defaults = NULL;
1445                 struct berval   authzID = BER_BVNULL;
1446                 int             freeauthz = 0;
1447
1448                 /* if SASL supports native authz, prepare for it */
1449                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1450                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1451                 {
1452                         switch ( mt->mt_idassert_mode ) {
1453                         case LDAP_BACK_IDASSERT_OTHERID:
1454                         case LDAP_BACK_IDASSERT_OTHERDN:
1455                                 authzID = mt->mt_idassert_authzID;
1456                                 break;
1457
1458                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1459                                 BER_BVSTR( &authzID, "dn:" );
1460                                 break;
1461
1462                         case LDAP_BACK_IDASSERT_SELF:
1463                                 if ( BER_BVISNULL( &ndn ) ) {
1464                                         /* connection is not authc'd, so don't idassert */
1465                                         BER_BVSTR( &authzID, "dn:" );
1466                                         break;
1467                                 }
1468                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1469                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1470                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1471                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1472                                                 ndn.bv_val, ndn.bv_len + 1 );
1473                                 freeauthz = 1;
1474                                 break;
1475
1476                         default:
1477                                 break;
1478                         }
1479                 }
1480
1481                 if ( mt->mt_idassert_secprops != NULL ) {
1482                         rs->sr_err = ldap_set_option( msc->msc_ld,
1483                                 LDAP_OPT_X_SASL_SECPROPS,
1484                                 (void *)mt->mt_idassert_secprops );
1485
1486                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1487                                 rs->sr_err = LDAP_OTHER;
1488                                 if ( sendok & LDAP_BACK_SENDERR ) {
1489                                         send_ldap_result( op, rs );
1490                                 }
1491                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1492                                 goto done;
1493                         }
1494                 }
1495
1496                 defaults = lutil_sasl_defaults( msc->msc_ld,
1497                                 mt->mt_idassert_sasl_mech.bv_val,
1498                                 mt->mt_idassert_sasl_realm.bv_val,
1499                                 mt->mt_idassert_authcID.bv_val,
1500                                 mt->mt_idassert_passwd.bv_val,
1501                                 authzID.bv_val );
1502                 if ( defaults == NULL ) {
1503                         rs->sr_err = LDAP_OTHER;
1504                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1505                         if ( sendok & LDAP_BACK_SENDERR ) {
1506                                 send_ldap_result( op, rs );
1507                         }
1508                         goto done;
1509                 }
1510
1511                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1512                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1513                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1514                                 defaults );
1515
1516                 rs->sr_err = slap_map_api2result( rs );
1517                 if ( rs->sr_err != LDAP_SUCCESS ) {
1518                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1519                         if ( sendok & LDAP_BACK_SENDERR ) {
1520                                 send_ldap_result( op, rs );
1521                         }
1522
1523                 } else {
1524                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1525                 }
1526
1527                 lutil_sasl_freedefs( defaults );
1528                 if ( freeauthz ) {
1529                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1530                 }
1531
1532                 goto done;
1533 #endif /* HAVE_CYRUS_SASL */
1534         }
1535
1536         *method = mt->mt_idassert_authmethod;
1537         switch ( mt->mt_idassert_authmethod ) {
1538         case LDAP_AUTH_NONE:
1539                 BER_BVSTR( binddn, "" );
1540                 BER_BVSTR( bindcred, "" );
1541                 /* fallthru */
1542
1543         case LDAP_AUTH_SIMPLE:
1544                 break;
1545
1546         default:
1547                 /* unsupported! */
1548                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1549                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1550                 if ( sendok & LDAP_BACK_SENDERR ) {
1551                         send_ldap_result( op, rs );
1552                 }
1553                 break;
1554         }
1555
1556 done:;
1557
1558         if ( !BER_BVISEMPTY( binddn ) ) {
1559                 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
1560         }
1561
1562         return rs->sr_err;
1563 }
1564
1565 static int
1566 meta_back_proxy_authz_bind(
1567         metaconn_t *mc,
1568         int candidate,
1569         Operation *op,
1570         SlapReply *rs,
1571         ldap_back_send_t sendok,
1572         int dolock )
1573 {
1574         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1575         metatarget_t            *mt = mi->mi_targets[ candidate ];
1576         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1577         struct berval           binddn = BER_BVC( "" ),
1578                                 cred = BER_BVC( "" );
1579         int                     method = LDAP_AUTH_NONE,
1580                                 rc;
1581
1582         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1583         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1584                 int     msgid;
1585
1586                 switch ( method ) {
1587                 case LDAP_AUTH_NONE:
1588                 case LDAP_AUTH_SIMPLE:
1589
1590                         if(!dolock) {
1591                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1592                         }
1593
1594                         for (;;) {
1595                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1596                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1597                                         &cred, NULL, NULL, &msgid );
1598                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1599                                         break;
1600                                 }
1601                                 ldap_pvt_thread_yield();
1602                         }
1603
1604                         if(!dolock) {
1605                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1606                         }
1607
1608                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok, dolock );
1609                         if ( rc == LDAP_SUCCESS ) {
1610                                 /* set rebind stuff in case of successful proxyAuthz bind,
1611                                  * so that referral chasing is attempted using the right
1612                                  * identity */
1613                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1614                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1615
1616                                 if ( META_BACK_TGT_SAVECRED( mt ) ) {
1617                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1618                                                 memset( msc->msc_cred.bv_val, 0,
1619                                                         msc->msc_cred.bv_len );
1620                                         }
1621                                         ber_bvreplace( &msc->msc_cred, &cred );
1622                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1623                                 }
1624                         }
1625                         break;
1626
1627                 default:
1628                         assert( 0 );
1629                         break;
1630                 }
1631         }
1632
1633         return LDAP_BACK_CONN_ISBOUND( msc );
1634 }
1635
1636 /*
1637  * Add controls;
1638  *
1639  * if any needs to be added, it is prepended to existing ones,
1640  * in a newly allocated array.  The companion function
1641  * mi->mi_ldap_extra->controls_free() must be used to restore the original
1642  * status of op->o_ctrls.
1643  */
1644 int
1645 meta_back_controls_add(
1646                 Operation       *op,
1647                 SlapReply       *rs,
1648                 metaconn_t      *mc,
1649                 int             candidate,
1650                 LDAPControl     ***pctrls )
1651 {
1652         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1653         metatarget_t            *mt = mi->mi_targets[ candidate ];
1654         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1655
1656         LDAPControl             **ctrls = NULL;
1657         /* set to the maximum number of controls this backend can add */
1658         LDAPControl             c[ 2 ] = {{ 0 }};
1659         int                     n = 0, i, j1 = 0, j2 = 0;
1660
1661         *pctrls = NULL;
1662
1663         rs->sr_err = LDAP_SUCCESS;
1664
1665         /* don't add controls if protocol is not LDAPv3 */
1666         switch ( mt->mt_version ) {
1667         case LDAP_VERSION3:
1668                 break;
1669
1670         case 0:
1671                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1672                         break;
1673                 }
1674                 /* fall thru */
1675
1676         default:
1677                 goto done;
1678         }
1679
1680         /* put controls that go __before__ existing ones here */
1681
1682         /* proxyAuthz for identity assertion */
1683         switch ( mi->mi_ldap_extra->proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
1684                 mt->mt_version, &mt->mt_idassert, &c[ j1 ] ) )
1685         {
1686         case SLAP_CB_CONTINUE:
1687                 break;
1688
1689         case LDAP_SUCCESS:
1690                 j1++;
1691                 break;
1692
1693         default:
1694                 goto done;
1695         }
1696
1697         /* put controls that go __after__ existing ones here */
1698
1699 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1700         /* session tracking */
1701         if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
1702                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
1703                 case SLAP_CB_CONTINUE:
1704                         break;
1705
1706                 case LDAP_SUCCESS:
1707                         j2++;
1708                         break;
1709
1710                 default:
1711                         goto done;
1712                 }
1713         }
1714 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
1715
1716         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
1717                 rs->sr_err = LDAP_SUCCESS;
1718         }
1719
1720         /* if nothing to do, just bail out */
1721         if ( j1 == 0 && j2 == 0 ) {
1722                 goto done;
1723         }
1724
1725         assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
1726
1727         if ( op->o_ctrls ) {
1728                 for ( n = 0; op->o_ctrls[ n ]; n++ )
1729                         /* just count ctrls */ ;
1730         }
1731
1732         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
1733                         op->o_tmpmemctx );
1734         if ( j1 ) {
1735                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
1736                 *ctrls[ 0 ] = c[ 0 ];
1737                 for ( i = 1; i < j1; i++ ) {
1738                         ctrls[ i ] = &ctrls[ 0 ][ i ];
1739                         *ctrls[ i ] = c[ i ];
1740                 }
1741         }
1742
1743         i = 0;
1744         if ( op->o_ctrls ) {
1745                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1746                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
1747                 }
1748         }
1749
1750         n += j1;
1751         if ( j2 ) {
1752                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
1753                 *ctrls[ n ] = c[ j1 ];
1754                 for ( i = 1; i < j2; i++ ) {
1755                         ctrls[ n + i ] = &ctrls[ n ][ i ];
1756                         *ctrls[ n + i ] = c[ i ];
1757                 }
1758         }
1759
1760         ctrls[ n + j2 ] = NULL;
1761
1762 done:;
1763         if ( ctrls == NULL ) {
1764                 ctrls = op->o_ctrls;
1765         }
1766
1767         *pctrls = ctrls;
1768
1769         return rs->sr_err;
1770 }
1771