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 1999-2013 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                 for (;;) {
 622                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 623                                 binddn, LDAP_SASL_SIMPLE, &cred,
 624                                 NULL, NULL, &msgid );
 625                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 626                                 break;
 627                         }
 628                         ldap_pvt_thread_yield();
 629                 }
 630
 631                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok, dolock );
 632
 633                 /* if bind succeeded, but anonymous, clear msc_bound_ndn */
 634                 if ( rs->sr_err != LDAP_SUCCESS || binddn[0] == '\0' ) {
 635                         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 636                                 ber_memfree( msc->msc_bound_ndn.bv_val );
 637                                 BER_BVZERO( &msc->msc_bound_ndn );
 638                         }
 639
 640                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 641                                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 642                                 ber_memfree( msc->msc_cred.bv_val );
 643                                 BER_BVZERO( &msc->msc_cred );
 644                         }
 645                 }
 646         }
 647
 648         if ( rs->sr_err != LDAP_SUCCESS ) {
 649                 if ( dolock ) {
 650                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 651                 }
 652                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 653                 if ( META_BACK_ONERR_STOP( mi ) ) {
 654                         LDAP_BACK_CONN_TAINTED_SET( mc );
 655                         meta_back_release_conn_lock( mi, mc, 0 );
 656                         *mcp = NULL;
 657                 }
 658                 if ( dolock ) {
 659                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 660                 }
 661         }
 662
 663         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 664                 meta_back_quarantine( op, rs, candidate );
 665         }
 666
 667         return rs->sr_err;
 668 }
 669
 670 /*
 671  * meta_back_dobind
 672  */
 673 int
 674 meta_back_dobind(
 675         Operation               *op,
 676         SlapReply               *rs,
 677         metaconn_t              *mc,
 678         ldap_back_send_t        sendok )
 679 {
 680         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 681
 682         int                     bound = 0,
 683                                 i,
 684                                 isroot = 0;
 685
 686         SlapReply               *candidates;
 687
 688         if ( be_isroot( op ) ) {
 689                 isroot = 1;
 690         }
 691
 692         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 693                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 694                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 695
 696                 Debug( LDAP_DEBUG_TRACE,
 697                         "%s meta_back_dobind: conn=%s%s\n",
 698                         op->o_log_prefix, buf,
 699                         isroot ? " (isroot)" : "" );
 700         }
 701
 702         /*
 703          * all the targets are bound as pseudoroot
 704          */
 705         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 706                 bound = 1;
 707                 goto done;
 708         }
 709
 710         candidates = meta_back_candidates_get( op );
 711
 712         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 713                 metatarget_t            *mt = mi->mi_targets[ i ];
 714                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 715                 int                     rc;
 716
 717                 /*
 718                  * Not a candidate
 719                  */
 720                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 721                         continue;
 722                 }
 723
 724                 assert( msc->msc_ld != NULL );
 725
 726                 /*
 727                  * If the target is already bound it is skipped
 728                  */
 729
 730 retry_binding:;
 731                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 732                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 733                         || ( LDAP_BACK_CONN_ISANON( msc )
 734                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 735                 {
 736                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 737                         ++bound;
 738                         continue;
 739
 740                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 741                 {
 742                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 743                         ldap_pvt_thread_yield();
 744                         goto retry_binding;
 745
 746                 }
 747
 748                 LDAP_BACK_CONN_BINDING_SET( msc );
 749                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 750
 751                 rc = meta_back_single_dobind( op, rs, &mc, i,
 752                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 753                 /*
 754                  * NOTE: meta_back_single_dobind() already retries;
 755                  * in case of failure, it resets mc...
 756                  */
 757                 if ( rc != LDAP_SUCCESS ) {
 758                         char            buf[ SLAP_TEXT_BUFLEN ];
 759
 760                         if ( mc == NULL ) {
 761                                 /* meta_back_single_dobind() already sent
 762                                  * response and released connection */
 763                                 goto send_err;
 764                         }
 765
 766
 767                         if ( rc == LDAP_UNAVAILABLE ) {
 768                                 /* FIXME: meta_back_retry() already re-calls
 769                                  * meta_back_single_dobind() */
 770                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 771                                         goto retry_ok;
 772                                 }
 773
 774                                 if ( mc != NULL ) {
 775                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 776                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 777                                         meta_back_release_conn_lock( mi, mc, 0 );
 778                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 779                                 }
 780
 781                                 return 0;
 782                         }
 783
 784                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 785                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 786                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 787
 788                         snprintf( buf, sizeof( buf ),
 789                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 790                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 791                                 rc, ldap_err2string( rc ) );
 792                         Debug( LDAP_DEBUG_ANY,
 793                                 "%s %s\n",
 794                                 op->o_log_prefix, buf, 0 );
 795
 796                         /*
 797                          * null cred bind should always succeed
 798                          * as anonymous, so a failure means
 799                          * the target is no longer candidate possibly
 800                          * due to technical reasons (remote host down?)
 801                          * so better clear the handle
 802                          */
 803                         /* leave the target candidate, but record the error for later use */
 804                         candidates[ i ].sr_err = rc;
 805                         if ( META_BACK_ONERR_STOP( mi ) ) {
 806                                 bound = 0;
 807                                 goto done;
 808                         }
 809
 810                         continue;
 811                 } /* else */
 812
 813 retry_ok:;
 814                 Debug( LDAP_DEBUG_TRACE,
 815                         "%s meta_back_dobind[%d]: "
 816                         "(%s)\n",
 817                         op->o_log_prefix, i,
 818                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 819
 820                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 821                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 822                 if ( isroot ) {
 823                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 824                 } else {
 825                         LDAP_BACK_CONN_ISANON_SET( msc );
 826                 }
 827                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 828                 ++bound;
 829         }
 830
 831 done:;
 832         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 833                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 834                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 835
 836                 Debug( LDAP_DEBUG_TRACE,
 837                         "%s meta_back_dobind: conn=%s bound=%d\n",
 838                         op->o_log_prefix, buf, bound );
 839         }
 840
 841         if ( bound == 0 ) {
 842                 meta_back_release_conn( mi, mc );
 843
 844 send_err:;
 845                 if ( sendok & LDAP_BACK_SENDERR ) {
 846                         if ( rs->sr_err == LDAP_SUCCESS ) {
 847                                 rs->sr_err = LDAP_BUSY;
 848                         }
 849                         send_ldap_result( op, rs );
 850                 }
 851
 852                 return 0;
 853         }
 854
 855         return ( bound > 0 );
 856 }
 857
 858 /*
 859  * meta_back_default_rebind
 860  *
 861  * This is a callback used for chasing referrals using the same
 862  * credentials as the original user on this session.
 863  */
 864 int
 865 meta_back_default_rebind(
 866         LDAP                    *ld,
 867         LDAP_CONST char         *url,
 868         ber_tag_t               request,
 869         ber_int_t               msgid,
 870         void                    *params )
 871 {
 872         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 873
 874         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 875                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 876                         NULL, NULL, NULL );
 877 }
 878
 879 /*
 880  * meta_back_default_urllist
 881  *
 882  * This is a callback used for mucking with the urllist
 883  */
 884 int
 885 meta_back_default_urllist(
 886         LDAP            *ld,
 887         LDAPURLDesc     **urllist,
 888         LDAPURLDesc     **url,
 889         void            *params )
 890 {
 891         metatarget_t    *mt = (metatarget_t *)params;
 892         LDAPURLDesc     **urltail;
 893
 894         if ( urllist == url ) {
 895                 return LDAP_SUCCESS;
 896         }
 897
 898         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 899                 /* count */ ;
 900
 901         *urltail = *urllist;
 902         *urllist = *url;
 903         *url = NULL;
 904
 905         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 906         if ( mt->mt_uri ) {
 907                 ch_free( mt->mt_uri );
 908         }
 909
 910         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 911         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 912
 913         return LDAP_SUCCESS;
 914 }
 915
 916 int
 917 meta_back_cancel(
 918         metaconn_t              *mc,
 919         Operation               *op,
 920         SlapReply               *rs,
 921         ber_int_t               msgid,
 922         int                     candidate,
 923         ldap_back_send_t        sendok )
 924 {
 925         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 926
 927         metatarget_t            *mt = mi->mi_targets[ candidate ];
 928         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 929
 930         int                     rc = LDAP_OTHER;
 931
 932         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 933                 op->o_log_prefix, candidate, msgid );
 934
 935         /* default behavior */
 936         if ( META_BACK_TGT_ABANDON( mt ) ) {
 937                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 938
 939         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 940                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 941
 942         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 943                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 944
 945         } else {
 946                 assert( 0 );
 947         }
 948
 949         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 950                 op->o_log_prefix, candidate, rc );
 951
 952         return rc;
 953 }
 954
 955
 956
 957 /*
 958  * FIXME: error return must be handled in a cleaner way ...
 959  */
 960 int
 961 meta_back_op_result(
 962         metaconn_t              *mc,
 963         Operation               *op,
 964         SlapReply               *rs,
 965         int                     candidate,
 966         ber_int_t               msgid,
 967         time_t                  timeout,
 968         ldap_back_send_t        sendok )
 969 {
 970         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 971
 972         const char      *save_text = rs->sr_text,
 973                         *save_matched = rs->sr_matched;
 974         BerVarray       save_ref = rs->sr_ref;
 975         LDAPControl     **save_ctrls = rs->sr_ctrls;
 976         void            *matched_ctx = NULL;
 977
 978         char            *matched = NULL;
 979         char            *text = NULL;
 980         char            **refs = NULL;
 981         LDAPControl     **ctrls = NULL;
 982
 983         assert( mc != NULL );
 984
 985         rs->sr_text = NULL;
 986         rs->sr_matched = NULL;
 987         rs->sr_ref = NULL;
 988         rs->sr_ctrls = NULL;
 989
 990         if ( candidate != META_TARGET_NONE ) {
 991                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 992                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 993
 994                 if ( LDAP_ERR_OK( rs->sr_err ) ) {
 995                         int             rc;
 996                         struct timeval  tv;
 997                         LDAPMessage     *res = NULL;
 998                         time_t          stoptime = (time_t)(-1);
 999                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
1000                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
1001                         const char      *timeout_text = "Operation timed out";
1002
1003                         /* if timeout is not specified, compute and use
1004                          * the one specific to the ongoing operation */
1005                         if ( timeout == (time_t)(-1) ) {
1006                                 slap_op_t       opidx = slap_req2op( op->o_tag );
1007
1008                                 if ( opidx == SLAP_OP_SEARCH ) {
1009                                         if ( op->ors_tlimit <= 0 ) {
1010                                                 timeout = 0;
1011
1012                                         } else {
1013                                                 timeout = op->ors_tlimit;
1014                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
1015                                                 timeout_text = NULL;
1016                                         }
1017
1018                                 } else {
1019                                         timeout = mt->mt_timeout[ opidx ];
1020                                 }
1021                         }
1022
1023                         /* better than nothing :) */
1024                         if ( timeout == 0 ) {
1025                                 if ( mi->mi_idle_timeout ) {
1026                                         timeout = mi->mi_idle_timeout;
1027
1028                                 } else if ( mi->mi_conn_ttl ) {
1029                                         timeout = mi->mi_conn_ttl;
1030                                 }
1031                         }
1032
1033                         if ( timeout ) {
1034                                 stoptime = op->o_time + timeout;
1035                         }
1036
1037                         LDAP_BACK_TV_SET( &tv );
1038
1039 retry:;
1040                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1041                         switch ( rc ) {
1042                         case 0:
1043                                 if ( timeout && slap_get_time() > stoptime ) {
1044                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
1045                                         rs->sr_err = timeout_err;
1046                                         rs->sr_text = timeout_text;
1047                                         break;
1048                                 }
1049
1050                                 LDAP_BACK_TV_SET( &tv );
1051                                 ldap_pvt_thread_yield();
1052                                 goto retry;
1053
1054                         case -1:
1055                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1056                                                 &rs->sr_err );
1057                                 break;
1058
1059
1060                         /* otherwise get the result; if it is not
1061                          * LDAP_SUCCESS, record it in the reply
1062                          * structure (this includes
1063                          * LDAP_COMPARE_{TRUE|FALSE}) */
1064                         default:
1065                                 /* only touch when activity actually took place... */
1066                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1067                                         msc->msc_time = op->o_time;
1068                                 }
1069
1070                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1071                                                 &matched, &text, &refs, &ctrls, 1 );
1072                                 res = NULL;
1073                                 if ( rc == LDAP_SUCCESS ) {
1074                                         rs->sr_text = text;
1075                                 } else {
1076                                         rs->sr_err = rc;
1077                                 }
1078                                 rs->sr_err = slap_map_api2result( rs );
1079
1080                                 /* RFC 4511: referrals can only appear
1081                                  * if result code is LDAP_REFERRAL */
1082                                 if ( refs != NULL
1083                                         && refs[ 0 ] != NULL
1084                                         && refs[ 0 ][ 0 ] != '\0' )
1085                                 {
1086                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1087                                                 Debug( LDAP_DEBUG_ANY,
1088                                                         "%s meta_back_op_result[%d]: "
1089                                                         "got referrals with err=%d\n",
1090                                                         op->o_log_prefix,
1091                                                         candidate, rs->sr_err );
1092
1093                                         } else {
1094                                                 int     i;
1095
1096                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1097                                                         /* count */ ;
1098                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1099                                                         op->o_tmpmemctx );
1100                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1101                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1102                                                 }
1103                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1104                                         }
1105
1106                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1107                                         Debug( LDAP_DEBUG_ANY,
1108                                                 "%s meta_back_op_result[%d]: "
1109                                                 "got err=%d with null "
1110                                                 "or empty referrals\n",
1111                                                 op->o_log_prefix,
1112                                                 candidate, rs->sr_err );
1113
1114                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1115                                 }
1116
1117                                 if ( ctrls != NULL ) {
1118                                         rs->sr_ctrls = ctrls;
1119                                 }
1120                         }
1121
1122                         assert( res == NULL );
1123                 }
1124
1125                 /* if the error in the reply structure is not
1126                  * LDAP_SUCCESS, try to map it from client
1127                  * to server error */
1128                 if ( !LDAP_ERR_OK( rs->sr_err ) ) {
1129                         rs->sr_err = slap_map_api2result( rs );
1130
1131                         /* internal ops ( op->o_conn == NULL )
1132                          * must not reply to client */
1133                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1134
1135                                 /* record the (massaged) matched
1136                                  * DN into the reply structure */
1137                                 rs->sr_matched = matched;
1138                         }
1139                 }
1140
1141                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1142                         meta_back_quarantine( op, rs, candidate );
1143                 }
1144
1145         } else {
1146                 int     i,
1147                         err = rs->sr_err;
1148
1149                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1150                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1151                         char                    *xtext = NULL;
1152                         char                    *xmatched = NULL;
1153
1154                         if ( msc->msc_ld == NULL ) {
1155                                 continue;
1156                         }
1157
1158                         rs->sr_err = LDAP_SUCCESS;
1159
1160                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1161                         if ( rs->sr_err != LDAP_SUCCESS ) {
1162                                 /*
1163                                  * better check the type of error. In some cases
1164                                  * (search ?) it might be better to return a
1165                                  * success if at least one of the targets gave
1166                                  * positive result ...
1167                                  */
1168                                 ldap_get_option( msc->msc_ld,
1169                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1170                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1171                                         ldap_memfree( xtext );
1172                                         xtext = NULL;
1173                                 }
1174
1175                                 ldap_get_option( msc->msc_ld,
1176                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1177                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1178                                         ldap_memfree( xmatched );
1179                                         xmatched = NULL;
1180                                 }
1181
1182                                 rs->sr_err = slap_map_api2result( rs );
1183
1184                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1185                                         char    buf[ SLAP_TEXT_BUFLEN ];
1186
1187                                         snprintf( buf, sizeof( buf ),
1188                                                 "meta_back_op_result[%d] "
1189                                                 "err=%d text=\"%s\" matched=\"%s\"",
1190                                                 i, rs->sr_err,
1191                                                 ( xtext ? xtext : "" ),
1192                                                 ( xmatched ? xmatched : "" ) );
1193                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1194                                                 op->o_log_prefix, buf, 0 );
1195                                 }
1196
1197                                 /*
1198                                  * FIXME: need to rewrite "match" (need rwinfo)
1199                                  */
1200                                 switch ( rs->sr_err ) {
1201                                 default:
1202                                         err = rs->sr_err;
1203                                         if ( xtext != NULL ) {
1204                                                 if ( text ) {
1205                                                         ldap_memfree( text );
1206                                                 }
1207                                                 text = xtext;
1208                                                 xtext = NULL;
1209                                         }
1210                                         if ( xmatched != NULL ) {
1211                                                 if ( matched ) {
1212                                                         ldap_memfree( matched );
1213                                                 }
1214                                                 matched = xmatched;
1215                                                 xmatched = NULL;
1216                                         }
1217                                         break;
1218                                 }
1219
1220                                 if ( xtext ) {
1221                                         ldap_memfree( xtext );
1222                                 }
1223
1224                                 if ( xmatched ) {
1225                                         ldap_memfree( xmatched );
1226                                 }
1227                         }
1228
1229                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1230                                 meta_back_quarantine( op, rs, i );
1231                         }
1232                 }
1233
1234                 if ( err != LDAP_SUCCESS ) {
1235                         rs->sr_err = err;
1236                 }
1237         }
1238
1239         if ( matched != NULL ) {
1240                 struct berval   dn, pdn;
1241
1242                 ber_str2bv( matched, 0, 0, &dn );
1243                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1244                         ldap_memfree( matched );
1245                         matched_ctx = op->o_tmpmemctx;
1246                         matched = pdn.bv_val;
1247                 }
1248                 rs->sr_matched = matched;
1249         }
1250
1251         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1252                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1253                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1254                                 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
1255                                 send_ldap_result( op, rs );
1256                         }
1257                 }
1258
1259         } else if ( op->o_conn &&
1260                 ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) )
1261                         || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) )
1262         {
1263                 send_ldap_result( op, rs );
1264         }
1265         if ( matched ) {
1266                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1267         }
1268         if ( text ) {
1269                 ldap_memfree( text );
1270         }
1271         if ( rs->sr_ref ) {
1272                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1273                 rs->sr_ref = NULL;
1274         }
1275         if ( refs ) {
1276                 ber_memvfree( (void **)refs );
1277         }
1278         if ( ctrls ) {
1279                 assert( rs->sr_ctrls != NULL );
1280                 ldap_controls_free( ctrls );
1281         }
1282
1283         rs->sr_text = save_text;
1284         rs->sr_matched = save_matched;
1285         rs->sr_ref = save_ref;
1286         rs->sr_ctrls = save_ctrls;
1287
1288         return( LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1289 }
1290
1291 /*
1292  * meta_back_proxy_authz_cred()
1293  *
1294  * prepares credentials & method for meta_back_proxy_authz_bind();
1295  * or, if method is SASL, performs the SASL bind directly.
1296  */
1297 int
1298 meta_back_proxy_authz_cred(
1299         metaconn_t              *mc,
1300         int                     candidate,
1301         Operation               *op,
1302         SlapReply               *rs,
1303         ldap_back_send_t        sendok,
1304         struct berval           *binddn,
1305         struct berval           *bindcred,
1306         int                     *method )
1307 {
1308         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1309         metatarget_t            *mt = mi->mi_targets[ candidate ];
1310         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1311         struct berval           ndn;
1312         int                     dobind = 0;
1313
1314         /* don't proxyAuthz if protocol is not LDAPv3 */
1315         switch ( mt->mt_version ) {
1316         case LDAP_VERSION3:
1317                 break;
1318
1319         case 0:
1320                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1321                         break;
1322                 }
1323                 /* fall thru */
1324
1325         default:
1326                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1327                 if ( sendok & LDAP_BACK_SENDERR ) {
1328                         send_ldap_result( op, rs );
1329                 }
1330                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1331                 goto done;
1332         }
1333
1334         if ( op->o_tag == LDAP_REQ_BIND ) {
1335                 ndn = op->o_req_ndn;
1336
1337         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1338                 ndn = op->o_conn->c_ndn;
1339
1340         } else {
1341                 ndn = op->o_ndn;
1342         }
1343         rs->sr_err = LDAP_SUCCESS;
1344
1345         /*
1346          * FIXME: we need to let clients use proxyAuthz
1347          * otherwise we cannot do symmetric pools of servers;
1348          * we have to live with the fact that a user can
1349          * authorize itself as any ID that is allowed
1350          * by the authzTo directive of the "proxyauthzdn".
1351          */
1352         /*
1353          * NOTE: current Proxy Authorization specification
1354          * and implementation do not allow proxy authorization
1355          * control to be provided with Bind requests
1356          */
1357         /*
1358          * if no bind took place yet, but the connection is bound
1359          * and the "proxyauthzdn" is set, then bind as
1360          * "proxyauthzdn" and explicitly add the proxyAuthz
1361          * control to every operation with the dn bound
1362          * to the connection as control value.
1363          */
1364
1365         /* bind as proxyauthzdn only if no idassert mode
1366          * is requested, or if the client's identity
1367          * is authorized */
1368         switch ( mt->mt_idassert_mode ) {
1369         case LDAP_BACK_IDASSERT_LEGACY:
1370                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1371                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1372                         {
1373                                 *binddn = mt->mt_idassert_authcDN;
1374                                 *bindcred = mt->mt_idassert_passwd;
1375                                 dobind = 1;
1376                         }
1377                 }
1378                 break;
1379
1380         default:
1381                 /* NOTE: rootdn can always idassert */
1382                 if ( BER_BVISNULL( &ndn )
1383                         && mt->mt_idassert_authz == NULL
1384                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1385                 {
1386                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1387                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1388                                 if ( sendok & LDAP_BACK_SENDERR ) {
1389                                         send_ldap_result( op, rs );
1390                                 }
1391                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1392                                 goto done;
1393
1394                         }
1395
1396                         rs->sr_err = LDAP_SUCCESS;
1397                         *binddn = slap_empty_bv;
1398                         *bindcred = slap_empty_bv;
1399                         break;
1400
1401                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1402                         struct berval authcDN;
1403
1404                         if ( BER_BVISNULL( &ndn ) ) {
1405                                 authcDN = slap_empty_bv;
1406
1407                         } else {
1408                                 authcDN = ndn;
1409                         }
1410                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1411                                         &authcDN, &authcDN );
1412                         if ( rs->sr_err != LDAP_SUCCESS ) {
1413                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1414                                         if ( sendok & LDAP_BACK_SENDERR ) {
1415                                                 send_ldap_result( op, rs );
1416                                         }
1417                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1418                                         goto done;
1419                                 }
1420
1421                                 rs->sr_err = LDAP_SUCCESS;
1422                                 *binddn = slap_empty_bv;
1423                                 *bindcred = slap_empty_bv;
1424                                 break;
1425                         }
1426                 }
1427
1428                 *binddn = mt->mt_idassert_authcDN;
1429                 *bindcred = mt->mt_idassert_passwd;
1430                 dobind = 1;
1431                 break;
1432         }
1433
1434         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1435 #ifdef HAVE_CYRUS_SASL
1436                 void            *defaults = NULL;
1437                 struct berval   authzID = BER_BVNULL;
1438                 int             freeauthz = 0;
1439
1440                 /* if SASL supports native authz, prepare for it */
1441                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1442                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1443                 {
1444                         switch ( mt->mt_idassert_mode ) {
1445                         case LDAP_BACK_IDASSERT_OTHERID:
1446                         case LDAP_BACK_IDASSERT_OTHERDN:
1447                                 authzID = mt->mt_idassert_authzID;
1448                                 break;
1449
1450                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1451                                 BER_BVSTR( &authzID, "dn:" );
1452                                 break;
1453
1454                         case LDAP_BACK_IDASSERT_SELF:
1455                                 if ( BER_BVISNULL( &ndn ) ) {
1456                                         /* connection is not authc'd, so don't idassert */
1457                                         BER_BVSTR( &authzID, "dn:" );
1458                                         break;
1459                                 }
1460                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1461                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1462                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1463                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1464                                                 ndn.bv_val, ndn.bv_len + 1 );
1465                                 freeauthz = 1;
1466                                 break;
1467
1468                         default:
1469                                 break;
1470                         }
1471                 }
1472
1473                 if ( mt->mt_idassert_secprops != NULL ) {
1474                         rs->sr_err = ldap_set_option( msc->msc_ld,
1475                                 LDAP_OPT_X_SASL_SECPROPS,
1476                                 (void *)mt->mt_idassert_secprops );
1477
1478                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1479                                 rs->sr_err = LDAP_OTHER;
1480                                 if ( sendok & LDAP_BACK_SENDERR ) {
1481                                         send_ldap_result( op, rs );
1482                                 }
1483                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1484                                 goto done;
1485                         }
1486                 }
1487
1488                 defaults = lutil_sasl_defaults( msc->msc_ld,
1489                                 mt->mt_idassert_sasl_mech.bv_val,
1490                                 mt->mt_idassert_sasl_realm.bv_val,
1491                                 mt->mt_idassert_authcID.bv_val,
1492                                 mt->mt_idassert_passwd.bv_val,
1493                                 authzID.bv_val );
1494                 if ( defaults == NULL ) {
1495                         rs->sr_err = LDAP_OTHER;
1496                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1497                         if ( sendok & LDAP_BACK_SENDERR ) {
1498                                 send_ldap_result( op, rs );
1499                         }
1500                         goto done;
1501                 }
1502
1503                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1504                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1505                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1506                                 defaults );
1507
1508                 rs->sr_err = slap_map_api2result( rs );
1509                 if ( rs->sr_err != LDAP_SUCCESS ) {
1510                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1511                         if ( sendok & LDAP_BACK_SENDERR ) {
1512                                 send_ldap_result( op, rs );
1513                         }
1514
1515                 } else {
1516                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1517                 }
1518
1519                 lutil_sasl_freedefs( defaults );
1520                 if ( freeauthz ) {
1521                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1522                 }
1523
1524                 goto done;
1525 #endif /* HAVE_CYRUS_SASL */
1526         }
1527
1528         *method = mt->mt_idassert_authmethod;
1529         switch ( mt->mt_idassert_authmethod ) {
1530         case LDAP_AUTH_NONE:
1531                 BER_BVSTR( binddn, "" );
1532                 BER_BVSTR( bindcred, "" );
1533                 /* fallthru */
1534
1535         case LDAP_AUTH_SIMPLE:
1536                 break;
1537
1538         default:
1539                 /* unsupported! */
1540                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1541                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1542                 if ( sendok & LDAP_BACK_SENDERR ) {
1543                         send_ldap_result( op, rs );
1544                 }
1545                 break;
1546         }
1547
1548 done:;
1549
1550         if ( !BER_BVISEMPTY( binddn ) ) {
1551                 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
1552         }
1553
1554         return rs->sr_err;
1555 }
1556
1557 static int
1558 meta_back_proxy_authz_bind(
1559         metaconn_t *mc,
1560         int candidate,
1561         Operation *op,
1562         SlapReply *rs,
1563         ldap_back_send_t sendok,
1564         int dolock )
1565 {
1566         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1567         metatarget_t            *mt = mi->mi_targets[ candidate ];
1568         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1569         struct berval           binddn = BER_BVC( "" ),
1570                                 cred = BER_BVC( "" );
1571         int                     method = LDAP_AUTH_NONE,
1572                                 rc;
1573
1574         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1575         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1576                 int     msgid;
1577
1578                 switch ( method ) {
1579                 case LDAP_AUTH_NONE:
1580                 case LDAP_AUTH_SIMPLE:
1581                         for (;;) {
1582                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1583                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1584                                         &cred, NULL, NULL, &msgid );
1585                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1586                                         break;
1587                                 }
1588                                 ldap_pvt_thread_yield();
1589                         }
1590                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok, dolock );
1591                         if ( rc == LDAP_SUCCESS ) {
1592                                 /* set rebind stuff in case of successful proxyAuthz bind,
1593                                  * so that referral chasing is attempted using the right
1594                                  * identity */
1595                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1596                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1597
1598                                 if ( META_BACK_TGT_SAVECRED( mt ) ) {
1599                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1600                                                 memset( msc->msc_cred.bv_val, 0,
1601                                                         msc->msc_cred.bv_len );
1602                                         }
1603                                         ber_bvreplace( &msc->msc_cred, &cred );
1604                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1605                                 }
1606                         }
1607                         break;
1608
1609                 default:
1610                         assert( 0 );
1611                         break;
1612                 }
1613         }
1614
1615         return LDAP_BACK_CONN_ISBOUND( msc );
1616 }
1617
1618 /*
1619  * Add controls;
1620  *
1621  * if any needs to be added, it is prepended to existing ones,
1622  * in a newly allocated array.  The companion function
1623  * mi->mi_ldap_extra->controls_free() must be used to restore the original
1624  * status of op->o_ctrls.
1625  */
1626 int
1627 meta_back_controls_add(
1628                 Operation       *op,
1629                 SlapReply       *rs,
1630                 metaconn_t      *mc,
1631                 int             candidate,
1632                 LDAPControl     ***pctrls )
1633 {
1634         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1635         metatarget_t            *mt = mi->mi_targets[ candidate ];
1636         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1637
1638         LDAPControl             **ctrls = NULL;
1639         /* set to the maximum number of controls this backend can add */
1640         LDAPControl             c[ 2 ] = {{ 0 }};
1641         int                     n = 0, i, j1 = 0, j2 = 0;
1642
1643         *pctrls = NULL;
1644
1645         rs->sr_err = LDAP_SUCCESS;
1646
1647         /* don't add controls if protocol is not LDAPv3 */
1648         switch ( mt->mt_version ) {
1649         case LDAP_VERSION3:
1650                 break;
1651
1652         case 0:
1653                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1654                         break;
1655                 }
1656                 /* fall thru */
1657
1658         default:
1659                 goto done;
1660         }
1661
1662         /* put controls that go __before__ existing ones here */
1663
1664         /* proxyAuthz for identity assertion */
1665         switch ( mi->mi_ldap_extra->proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
1666                 mt->mt_version, &mt->mt_idassert, &c[ j1 ] ) )
1667         {
1668         case SLAP_CB_CONTINUE:
1669                 break;
1670
1671         case LDAP_SUCCESS:
1672                 j1++;
1673                 break;
1674
1675         default:
1676                 goto done;
1677         }
1678
1679         /* put controls that go __after__ existing ones here */
1680
1681 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1682         /* session tracking */
1683         if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
1684                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
1685                 case SLAP_CB_CONTINUE:
1686                         break;
1687
1688                 case LDAP_SUCCESS:
1689                         j2++;
1690                         break;
1691
1692                 default:
1693                         goto done;
1694                 }
1695         }
1696 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
1697
1698         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
1699                 rs->sr_err = LDAP_SUCCESS;
1700         }
1701
1702         /* if nothing to do, just bail out */
1703         if ( j1 == 0 && j2 == 0 ) {
1704                 goto done;
1705         }
1706
1707         assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
1708
1709         if ( op->o_ctrls ) {
1710                 for ( n = 0; op->o_ctrls[ n ]; n++ )
1711                         /* just count ctrls */ ;
1712         }
1713
1714         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
1715                         op->o_tmpmemctx );
1716         if ( j1 ) {
1717                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
1718                 *ctrls[ 0 ] = c[ 0 ];
1719                 for ( i = 1; i < j1; i++ ) {
1720                         ctrls[ i ] = &ctrls[ 0 ][ i ];
1721                         *ctrls[ i ] = c[ i ];
1722                 }
1723         }
1724
1725         i = 0;
1726         if ( op->o_ctrls ) {
1727                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1728                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
1729                 }
1730         }
1731
1732         n += j1;
1733         if ( j2 ) {
1734                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
1735                 *ctrls[ n ] = c[ j1 ];
1736                 for ( i = 1; i < j2; i++ ) {
1737                         ctrls[ n + i ] = &ctrls[ n ][ i ];
1738                         *ctrls[ n + i ] = c[ i ];
1739                 }
1740         }
1741
1742         ctrls[ n + j2 ] = NULL;
1743
1744 done:;
1745         if ( ctrls == NULL ) {
1746                 ctrls = op->o_ctrls;
1747         }
1748
1749         *pctrls = ctrls;
1750
1751         return rs->sr_err;
1752 }
1753