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

   1 /* bind.c - ldap backend bind function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1999-2006 The OpenLDAP Foundation.
   6  * Portions Copyright 2000-2003 Pierangelo Masarati.
   7  * Portions Copyright 1999-2003 Howard Chu.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/errno.h>
  29 #include <ac/socket.h>
  30 #include <ac/string.h>
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "back-ldap.h"
  35
  36 #include <lutil_ldap.h>
  37
  38 #ifndef PRINT_CONNTREE
  39 #define PRINT_CONNTREE 0
  40 #endif /* !PRINT_CONNTREE */
  41
  42 #define LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ       "2.16.840.1.113730.3.4.12"
  43
  44 static LDAP_REBIND_PROC ldap_back_default_rebind;
  45
  46 LDAP_REBIND_PROC        *ldap_back_rebind_f = ldap_back_default_rebind;
  47
  48 static int
  49 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
  50
  51 static int
  52 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
  53
  54 static int
  55 ldap_back_conndnlc_cmp( const void *c1, const void *c2 );
  56
  57 int
  58 ldap_back_bind( Operation *op, SlapReply *rs )
  59 {
  60         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
  61         ldapconn_t      *lc;
  62
  63         int rc = 0;
  64         ber_int_t msgid;
  65
  66         lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR );
  67         if ( !lc ) {
  68                 return rs->sr_err;
  69         }
  70
  71         if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
  72                 ch_free( lc->lc_bound_ndn.bv_val );
  73                 BER_BVZERO( &lc->lc_bound_ndn );
  74         }
  75         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
  76
  77         /* method is always LDAP_AUTH_SIMPLE if we got here */
  78         rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
  79                         LDAP_SASL_SIMPLE,
  80                         &op->orb_cred, op->o_ctrls, NULL, &msgid );
  81         rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_SENDERR );
  82
  83         if ( rc == LDAP_SUCCESS ) {
  84                 /* If defined, proxyAuthz will be used also when
  85                  * back-ldap is the authorizing backend; for this
  86                  * purpose, a successful bind is followed by a
  87                  * bind with the configured identity assertion */
  88                 /* NOTE: use with care */
  89                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
  90                         ldap_back_proxy_authz_bind( lc, op, rs, LDAP_BACK_SENDERR );
  91                         if ( !LDAP_BACK_CONN_ISBOUND( lc ) ) {
  92                                 rc = 1;
  93                                 goto done;
  94                         }
  95                 }
  96
  97                 LDAP_BACK_CONN_ISBOUND_SET( lc );
  98                 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
  99
 100                 if ( LDAP_BACK_SAVECRED( li ) ) {
 101                         if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 102                                 memset( lc->lc_cred.bv_val, 0,
 103                                                 lc->lc_cred.bv_len );
 104                         }
 105                         ber_bvreplace( &lc->lc_cred, &op->orb_cred );
 106                         ldap_set_rebind_proc( lc->lc_ld, ldap_back_rebind_f, lc );
 107                 }
 108         }
 109 done:;
 110
 111         assert( lc->lc_binding == 1 );
 112         lc->lc_binding = 0;
 113
 114         /* must re-insert if local DN changed as result of bind */
 115         if ( !LDAP_BACK_CONN_ISBOUND( lc )
 116                 || ( LDAP_BACK_CONN_ISBOUND( lc )
 117                         && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) ) )
 118         {
 119                 int             lerr = -1;
 120                 ldapconn_t      *tmplc;
 121
 122                 /* wait for all other ops to release the connection */
 123 retry_lock:;
 124                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 125                 if ( lc->lc_refcnt > 1 ) {
 126                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 127                         ldap_pvt_thread_yield();
 128                         goto retry_lock;
 129                 }
 130
 131                 assert( lc->lc_refcnt == 1 );
 132                 tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 133                                 ldap_back_conndnlc_cmp );
 134                 assert( tmplc == NULL || lc == tmplc );
 135
 136                 if ( LDAP_BACK_CONN_ISBOUND( lc ) ) {
 137                         ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
 138                         lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 139                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 140                 }
 141
 142                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 143                 switch ( lerr ) {
 144                 case 0:
 145                         break;
 146
 147                 case -1:
 148                         /* duplicate; someone else successfully bound
 149                          * on the same connection with the same identity;
 150                          * we can do this because lc_refcnt == 1 */
 151                         ldap_back_conn_free( lc );
 152                         lc = NULL;
 153                 }
 154         }
 155
 156         if ( lc != NULL ) {
 157                 ldap_back_release_conn( op, rs, lc );
 158         }
 159
 160         return( rc );
 161 }
 162
 163 /*
 164  * ldap_back_conndn_cmp
 165  *
 166  * compares two ldapconn_t based on the value of the conn pointer
 167  * and of the local DN; used by avl stuff for insert, lookup
 168  * and direct delete
 169  */
 170 int
 171 ldap_back_conndn_cmp( const void *c1, const void *c2 )
 172 {
 173         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 174         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 175         int rc;
 176
 177         /* If local DNs don't match, it is definitely not a match */
 178         /* For shared sessions, conn is NULL. Only explicitly
 179          * bound sessions will have non-NULL conn.
 180          */
 181         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 182         if ( rc == 0 ) {
 183                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 184         }
 185
 186         return rc;
 187 }
 188
 189 /*
 190  * ldap_back_conndnlc_cmp
 191  *
 192  * compares two ldapconn_t based on the value of the conn pointer,
 193  * the local DN and the lc pointer; used by avl stuff for insert, lookup
 194  * and direct delete
 195  */
 196 static int
 197 ldap_back_conndnlc_cmp( const void *c1, const void *c2 )
 198 {
 199         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 200         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 201         int rc;
 202
 203         /* If local DNs don't match, it is definitely not a match */
 204         /* For shared sessions, conn is NULL. Only explicitly
 205          * bound sessions will have non-NULL conn.
 206          */
 207         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 208         if ( rc == 0 ) {
 209                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 210                 if ( rc == 0 ) {
 211                         rc = SLAP_PTRCMP( lc1, lc2 );
 212                 }
 213         }
 214
 215         return rc;
 216 }
 217
 218 /*
 219  * ldap_back_conn_cmp
 220  *
 221  * compares two ldapconn_t based on the value of the conn pointer;
 222  * used by avl stuff for delete of all conns with the same connid
 223  */
 224 int
 225 ldap_back_conn_cmp( const void *c1, const void *c2 )
 226 {
 227         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 228         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 229
 230         /* For shared sessions, conn is NULL. Only explicitly
 231          * bound sessions will have non-NULL conn.
 232          */
 233         return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 234 }
 235
 236 /*
 237  * ldap_back_conndn_dup
 238  *
 239  * returns -1 in case a duplicate ldapconn_t has been inserted;
 240  * used by avl stuff
 241  */
 242 int
 243 ldap_back_conndn_dup( void *c1, void *c2 )
 244 {
 245         ldapconn_t      *lc1 = (ldapconn_t *)c1;
 246         ldapconn_t      *lc2 = (ldapconn_t *)c2;
 247
 248         /* Cannot have more than one shared session with same DN */
 249         if ( lc1->lc_conn == lc2->lc_conn &&
 250                 dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) )
 251         {
 252                 return -1;
 253         }
 254
 255         return 0;
 256 }
 257
 258 #if PRINT_CONNTREE > 0
 259 static void
 260 ravl_print( Avlnode *root, int depth )
 261 {
 262         int             i;
 263         ldapconn_t      *lc;
 264
 265         if ( root == 0 ) {
 266                 return;
 267         }
 268
 269         ravl_print( root->avl_right, depth+1 );
 270
 271         for ( i = 0; i < depth; i++ ) {
 272                 fprintf( stderr, "-" );
 273         }
 274
 275         lc = root->avl_data;
 276         fprintf( stderr, "lc=%p local=\"%s\" conn=%p %s refcnt=%d\n",
 277                 (void *)lc, lc->lc_local_ndn.bv_val, (void *)lc->lc_conn,
 278                 avl_bf2str( root->avl_bf ), lc->lc_refcnt );
 279
 280         ravl_print( root->avl_left, depth+1 );
 281 }
 282
 283 static void
 284 myprint( Avlnode *root )
 285 {
 286         fprintf( stderr, "========>\n" );
 287
 288         if ( root == 0 ) {
 289                 fprintf( stderr, "\tNULL\n" );
 290
 291         } else {
 292                 ravl_print( root, 0 );
 293         }
 294
 295         fprintf( stderr, "<========\n" );
 296 }
 297 #endif /* PRINT_CONNTREE */
 298
 299 int
 300 ldap_back_freeconn( Operation *op, ldapconn_t *lc, int dolock )
 301 {
 302         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 303         ldapconn_t      *tmplc;
 304
 305         if ( dolock ) {
 306                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 307         }
 308
 309         assert( lc->lc_refcnt >= 0 );
 310         tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 311                         ldap_back_conndnlc_cmp );
 312         assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc );
 313         if ( lc->lc_refcnt == 0 ) {
 314                 ldap_back_conn_free( (void *)lc );
 315         }
 316
 317         if ( dolock ) {
 318                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 319         }
 320
 321         return 0;
 322 }
 323
 324 #ifdef HAVE_TLS
 325 static int
 326 ldap_back_start_tls(
 327         LDAP            *ld,
 328         int             protocol,
 329         int             *is_tls,
 330         const char      *url,
 331         unsigned        flags,
 332         int             retries,
 333         const char      **text )
 334 {
 335         int             rc = LDAP_SUCCESS;
 336         ldapinfo_t      dummy;
 337
 338         /* this is ridiculous... */
 339         dummy.li_flags = flags;
 340
 341         /* start TLS ("tls-[try-]{start,propagate}" statements) */
 342         if ( ( LDAP_BACK_USE_TLS( &dummy ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &dummy ) ) )
 343                                 && !ldap_is_ldaps_url( url ) )
 344         {
 345 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
 346                 /*
 347                  * use asynchronous StartTLS
 348                  * in case, chase referral (not implemented yet)
 349                  */
 350                 int             msgid;
 351
 352                 if ( protocol == 0 ) {
 353                         ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
 354                                         (void *)&protocol );
 355                 }
 356
 357                 if ( protocol < LDAP_VERSION3 ) {
 358                         /* we should rather bail out... */
 359                         rc = LDAP_UNWILLING_TO_PERFORM;
 360                         *text = "invalid protocol version";
 361                 }
 362
 363                 if ( rc == LDAP_SUCCESS ) {
 364                         rc = ldap_start_tls( ld, NULL, NULL, &msgid );
 365                 }
 366
 367                 if ( rc == LDAP_SUCCESS ) {
 368                         LDAPMessage     *res = NULL;
 369                         struct timeval  tv;
 370
 371                         LDAP_BACK_TV_SET( &tv );
 372
 373 retry:;
 374                         rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
 375                         if ( rc < 0 ) {
 376                                 rc = LDAP_UNAVAILABLE;
 377
 378                         } else if ( rc == 0 ) {
 379                                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 380                                         ldap_pvt_thread_yield();
 381                                         if ( retries > 0 ) {
 382                                                 retries--;
 383                                         }
 384                                         LDAP_BACK_TV_SET( &tv );
 385                                         goto retry;
 386                                 }
 387                                 rc = LDAP_UNAVAILABLE;
 388
 389                         } else if ( rc == LDAP_RES_EXTENDED ) {
 390                                 struct berval   *data = NULL;
 391
 392                                 rc = ldap_parse_extended_result( ld, res,
 393                                                 NULL, &data, 0 );
 394                                 if ( rc == LDAP_SUCCESS ) {
 395                                         int err;
 396                                         rc = ldap_parse_result( ld, res, &err,
 397                                                 NULL, NULL, NULL, NULL, 1 );
 398                                         if ( rc == LDAP_SUCCESS ) {
 399                                                 rc = err;
 400                                         }
 401                                         res = NULL;
 402
 403                                         /* FIXME: in case a referral
 404                                          * is returned, should we try
 405                                          * using it instead of the
 406                                          * configured URI? */
 407                                         if ( rc == LDAP_SUCCESS ) {
 408                                                 rc = ldap_install_tls( ld );
 409
 410                                         } else if ( rc == LDAP_REFERRAL ) {
 411                                                 rc = LDAP_UNWILLING_TO_PERFORM;
 412                                                 *text = "unwilling to chase referral returned by Start TLS exop";
 413                                         }
 414
 415                                         if ( data ) {
 416                                                 if ( data->bv_val ) {
 417                                                         ber_memfree( data->bv_val );
 418                                                 }
 419                                                 ber_memfree( data );
 420                                         }
 421                                 }
 422
 423                         } else {
 424                                 rc = LDAP_OTHER;
 425                         }
 426
 427                         if ( res != NULL ) {
 428                                 ldap_msgfree( res );
 429                         }
 430                 }
 431 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 432                 /*
 433                  * use synchronous StartTLS
 434                  */
 435                 rc = ldap_start_tls_s( ld, NULL, NULL );
 436 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 437
 438                 /* if StartTLS is requested, only attempt it if the URL
 439                  * is not "ldaps://"; this may occur not only in case
 440                  * of misconfiguration, but also when used in the chain
 441                  * overlay, where the "uri" can be parsed out of a referral */
 442                 switch ( rc ) {
 443                 case LDAP_SUCCESS:
 444                         *is_tls = 1;
 445                         break;
 446
 447                 case LDAP_SERVER_DOWN:
 448                         break;
 449
 450                 default:
 451                         if ( LDAP_BACK_TLS_CRITICAL( &dummy ) ) {
 452                                 *text = "could not start TLS";
 453                                 break;
 454                         }
 455
 456                         /* in case Start TLS is not critical */
 457                         *is_tls = 0;
 458                         rc = LDAP_SUCCESS;
 459                         break;
 460                 }
 461
 462         } else {
 463                 *is_tls = 0;
 464         }
 465
 466         return rc;
 467 }
 468 #endif /* HAVE_TLS */
 469
 470 static int
 471 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 472 {
 473         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 474         int             version;
 475         LDAP            *ld = NULL;
 476 #ifdef HAVE_TLS
 477         int             is_tls = op->o_conn->c_is_tls;
 478 #endif /* HAVE_TLS */
 479
 480         assert( lcp != NULL );
 481
 482         rs->sr_err = ldap_initialize( &ld, li->li_uri );
 483         if ( rs->sr_err != LDAP_SUCCESS ) {
 484                 goto error_return;
 485         }
 486
 487         /* Set LDAP version. This will always succeed: If the client
 488          * bound with a particular version, then so can we.
 489          */
 490         if ( li->li_version != 0 ) {
 491                 version = li->li_version;
 492
 493         } else if ( op->o_protocol != 0 ) {
 494                 version = op->o_protocol;
 495
 496         } else {
 497                 /* assume it's an internal op; set to LDAPv3 */
 498                 version = LDAP_VERSION3;
 499         }
 500         ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
 501
 502         /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
 503         ldap_set_option( ld, LDAP_OPT_REFERRALS,
 504                 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
 505
 506         if ( li->li_network_timeout > 0 ) {
 507                 struct timeval          tv;
 508
 509                 tv.tv_sec = li->li_network_timeout;
 510                 tv.tv_usec = 0;
 511                 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
 512         }
 513
 514 #ifdef HAVE_TLS
 515         rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
 516                         li->li_uri, li->li_flags, li->li_nretries, &rs->sr_text );
 517         if ( rs->sr_err != LDAP_SUCCESS ) {
 518                 ldap_unbind_ext( ld, NULL, NULL );
 519                 goto error_return;
 520         }
 521 #endif /* HAVE_TLS */
 522
 523         if ( *lcp == NULL ) {
 524                 *lcp = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
 525                 (*lcp)->lc_flags= li->li_flags;
 526         }
 527         (*lcp)->lc_ld = ld;
 528         (*lcp)->lc_refcnt = 1;
 529         (*lcp)->lc_binding = 1;
 530 #ifdef HAVE_TLS
 531         if ( is_tls ) {
 532                 LDAP_BACK_CONN_ISTLS_SET( *lcp );
 533         } else {
 534                 LDAP_BACK_CONN_ISTLS_CLEAR( *lcp );
 535         }
 536 #endif /* HAVE_TLS */
 537
 538 error_return:;
 539         if ( rs->sr_err != LDAP_SUCCESS ) {
 540                 rs->sr_err = slap_map_api2result( rs );
 541                 if ( sendok & LDAP_BACK_SENDERR ) {
 542                         if ( rs->sr_text == NULL ) {
 543                                 rs->sr_text = "ldap_initialize() failed";
 544                         }
 545                         send_ldap_result( op, rs );
 546                         rs->sr_text = NULL;
 547                 }
 548
 549         } else {
 550                 if ( li->li_conn_ttl > 0 ) {
 551                         (*lcp)->lc_create_time = op->o_time;
 552                 }
 553         }
 554
 555         return rs->sr_err;
 556 }
 557
 558 ldapconn_t *
 559 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 560 {
 561         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 562         ldapconn_t      *lc = NULL,
 563                         lc_curr = { 0 };
 564         int             refcnt = 1, binding = 1;
 565
 566         /* Internal searches are privileged and shared. So is root. */
 567         if ( op->o_do_not_cache || be_isroot( op ) ) {
 568                 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
 569                 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
 570                 lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
 571
 572         } else {
 573                 lc_curr.lc_local_ndn = op->o_ndn;
 574                 /* Explicit binds must not be shared */
 575                 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
 576                         lc_curr.lc_conn = op->o_conn;
 577
 578                 } else {
 579                         lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
 580                 }
 581         }
 582
 583         /* Explicit Bind requests always get their own conn */
 584         if ( !( sendok & LDAP_BACK_BINDING ) ) {
 585                 /* Searches for a ldapconn in the avl tree */
 586 retry_lock:
 587                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 588
 589                 lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 590                                 (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 591                 if ( lc != NULL ) {
 592                         /* Don't reuse connections while they're still binding */
 593                         if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 594                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 595                                 ldap_pvt_thread_yield();
 596                                 goto retry_lock;
 597                         }
 598                         refcnt = ++lc->lc_refcnt;
 599                         binding = ++lc->lc_binding;
 600                 }
 601                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 602         }
 603
 604         /* Looks like we didn't get a bind. Open a new session... */
 605         if ( lc == NULL ) {
 606                 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
 607                         return NULL;
 608                 }
 609                 if ( sendok & LDAP_BACK_BINDING ) {
 610                         LDAP_BACK_CONN_BINDING_SET( lc );
 611                 }
 612                 lc->lc_conn = lc_curr.lc_conn;
 613                 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
 614
 615                 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
 616                         ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
 617                         ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
 618                         LDAP_BACK_CONN_ISPRIV_SET( lc );
 619
 620                 } else {
 621                         BER_BVZERO( &lc->lc_cred );
 622                         BER_BVZERO( &lc->lc_bound_ndn );
 623 #if 0
 624                         /* FIXME: if we set lc_bound_ndn = o_ndn
 625                          * we end up with a bind with DN but no password! */
 626                         if ( !BER_BVISEMPTY( &op->o_ndn )
 627                                 && SLAP_IS_AUTHZ_BACKEND( op ) )
 628                         {
 629                                 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
 630                         }
 631 #endif
 632                 }
 633
 634 #ifdef HAVE_TLS
 635                 /* if start TLS failed but it was not mandatory,
 636                  * check if the non-TLS connection was already
 637                  * in cache; in case, destroy the newly created
 638                  * connection and use the existing one */
 639                 if ( lc->lc_conn == LDAP_BACK_PCONN_TLS
 640                                 && !ldap_tls_inplace( lc->lc_ld ) )
 641                 {
 642                         ldapconn_t *tmplc;
 643
 644                         lc_curr.lc_conn = LDAP_BACK_PCONN;
 645                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 646                         tmplc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 647                                         (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 648                         if ( tmplc != NULL ) {
 649                                 refcnt = ++tmplc->lc_refcnt;
 650                                 binding = ++tmplc->lc_binding;
 651                                 ldap_back_conn_free( lc );
 652                                 lc = tmplc;
 653                         }
 654                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 655
 656                         if ( tmplc != NULL ) {
 657                                 goto done;
 658                         }
 659                 }
 660 #endif /* HAVE_TLS */
 661
 662                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 663
 664                 /* Inserts the newly created ldapconn in the avl tree */
 665                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 666
 667                 assert( lc->lc_refcnt == 1 );
 668                 assert( lc->lc_binding == 1 );
 669                 rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 670                         ldap_back_conndn_cmp, ldap_back_conndn_dup );
 671
 672 #if PRINT_CONNTREE > 0
 673                 myprint( li->li_conninfo.lai_tree );
 674 #endif /* PRINT_CONNTREE */
 675
 676                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 677
 678                 Debug( LDAP_DEBUG_TRACE,
 679                         "=>ldap_back_getconn: conn %p inserted refcnt=%u binding=%u\n",
 680                         (void *)lc, refcnt, binding );
 681
 682                 /* Err could be -1 in case a duplicate ldapconn is inserted */
 683                 switch ( rs->sr_err ) {
 684                 case 0:
 685                         break;
 686
 687                 case -1:
 688                         if ( !( sendok & LDAP_BACK_BINDING ) ) {
 689                                 /* duplicate: free and try to get the newly created one */
 690                                 goto retry_lock;
 691                         }
 692                         /* taint connection, so that it'll be freed when released */
 693                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 694                         (void *)avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 695                                         ldap_back_conndnlc_cmp );
 696                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 697                         LDAP_BACK_CONN_TAINTED_SET( lc );
 698                         break;
 699
 700                 default:
 701                         ldap_back_conn_free( lc );
 702                         rs->sr_err = LDAP_OTHER;
 703                         rs->sr_text = "proxy bind collision";
 704                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
 705                                 send_ldap_result( op, rs );
 706                                 rs->sr_text = NULL;
 707                         }
 708                         return NULL;
 709                 }
 710
 711         } else {
 712                 char    buf[ SLAP_TEXT_BUFLEN ];
 713                 int     expiring = 0;
 714
 715                 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
 716                         || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
 717                 {
 718                         expiring = 1;
 719
 720                         /* let it be used, but taint/delete it so that
 721                          * no-one else can look it up any further */
 722                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 723                         (void *)avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 724                                         ldap_back_conndnlc_cmp );
 725                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 726                         LDAP_BACK_CONN_TAINTED_SET( lc );
 727                 }
 728
 729                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 730                         snprintf( buf, sizeof( buf ),
 731                                 "conn %p fetched refcnt=%u binding=%u%s",
 732                                 (void *)lc, refcnt, binding, expiring ? " expiring" : "" );
 733                         Debug( LDAP_DEBUG_TRACE,
 734                                 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
 735                 }
 736         }
 737
 738         if ( li->li_idle_timeout && lc ) {
 739                 lc->lc_time = op->o_time;
 740         }
 741
 742 done:;
 743         return lc;
 744 }
 745
 746 void
 747 ldap_back_release_conn_lock(
 748         Operation               *op,
 749         SlapReply               *rs,
 750         ldapconn_t              *lc,
 751         int                     dolock )
 752 {
 753         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 754
 755         if ( dolock ) {
 756                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 757         }
 758         assert( lc->lc_refcnt > 0 );
 759         LDAP_BACK_CONN_BINDING_CLEAR( lc );
 760         lc->lc_refcnt--;
 761         if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
 762                 ldap_back_freeconn( op, lc, 0 );
 763         }
 764         if ( dolock ) {
 765                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 766         }
 767 }
 768
 769 /*
 770  * ldap_back_dobind
 771  *
 772  * Note: as the check for the value of lc->lc_bound was already here, I removed
 773  * it from all the callers, and I made the function return the flag, so
 774  * it can be used to simplify the check.
 775  *
 776  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
 777  */
 778 static int
 779 ldap_back_dobind_int(
 780         ldapconn_t              *lc,
 781         Operation               *op,
 782         SlapReply               *rs,
 783         ldap_back_send_t        sendok,
 784         int                     retries,
 785         int                     dolock )
 786 {
 787         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 788
 789         int             rc, binding = 0;
 790         ber_int_t       msgid;
 791
 792         assert( retries >= 0 );
 793
 794 retry_lock:;
 795         if ( dolock ) {
 796                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 797         }
 798
 799         if ( binding == 0 ) {
 800                 /* check if already bound */
 801                 rc = LDAP_BACK_CONN_ISBOUND( lc );
 802                 if ( rc ) {
 803                         lc->lc_binding--;
 804                         if ( dolock ) {
 805                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 806                         }
 807                         return rc;
 808                 }
 809
 810                 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 811                         /* if someone else is about to bind it, give up and retry */
 812                         if ( dolock ) {
 813                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 814                         }
 815                         ldap_pvt_thread_yield();
 816                         goto retry_lock;
 817
 818                 } else {
 819                         /* otherwise this thread will bind it */
 820                         LDAP_BACK_CONN_BINDING_SET( lc );
 821                         binding = 1;
 822                 }
 823         }
 824
 825         /* wait for pending operations to finish */
 826         /* FIXME: may become a bottleneck! */
 827         if ( lc->lc_refcnt != lc->lc_binding ) {
 828                 if ( dolock ) {
 829                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 830                 }
 831                 ldap_pvt_thread_yield();
 832                 goto retry_lock;
 833         }
 834
 835         if ( dolock ) {
 836                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 837         }
 838
 839 #if 0
 840         while ( lc->lc_refcnt > 1 ) {
 841                 ldap_pvt_thread_yield();
 842                 rc = LDAP_BACK_CONN_ISBOUND( lc );
 843                 if ( rc ) {
 844                         return rc;
 845                 }
 846         }
 847
 848         if ( dolock ) {
 849                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 850         }
 851         LDAP_BACK_CONN_BINDING_SET( lc );
 852         if ( dolock ) {
 853                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 854         }
 855 #endif
 856
 857         /*
 858          * FIXME: we need to let clients use proxyAuthz
 859          * otherwise we cannot do symmetric pools of servers;
 860          * we have to live with the fact that a user can
 861          * authorize itself as any ID that is allowed
 862          * by the authzTo directive of the "proxyauthzdn".
 863          */
 864         /*
 865          * NOTE: current Proxy Authorization specification
 866          * and implementation do not allow proxy authorization
 867          * control to be provided with Bind requests
 868          */
 869         /*
 870          * if no bind took place yet, but the connection is bound
 871          * and the "idassert-authcDN" (or other ID) is set,
 872          * then bind as the asserting identity and explicitly
 873          * add the proxyAuthz control to every operation with the
 874          * dn bound to the connection as control value.
 875          * This is done also if this is the authrizing backend,
 876          * but the "override" flag is given to idassert.
 877          * It allows to use SASL bind and yet proxyAuthz users
 878          */
 879         if ( op->o_conn != NULL &&
 880                         !op->o_do_not_cache &&
 881                         ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
 882                           ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 883         {
 884                 (void)ldap_back_proxy_authz_bind( lc, op, rs, sendok );
 885                 goto done;
 886         }
 887
 888 #ifdef HAVE_CYRUS_SASL
 889         if ( LDAP_BACK_CONN_ISPRIV( lc )
 890                 && li->li_acl_authmethod == LDAP_AUTH_SASL )
 891         {
 892                 void            *defaults = NULL;
 893
 894                 if ( li->li_acl_secprops != NULL ) {
 895                         rc = ldap_set_option( lc->lc_ld,
 896                                 LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops);
 897
 898                         if ( rc != LDAP_OPT_SUCCESS ) {
 899                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
 900                                         "(%s,SECPROPS,\"%s\") failed!\n",
 901                                         li->li_uri, li->li_acl_secprops, 0 );
 902                                 goto done;
 903                         }
 904                 }
 905
 906                 defaults = lutil_sasl_defaults( lc->lc_ld,
 907                                 li->li_acl_sasl_mech.bv_val,
 908                                 li->li_acl_sasl_realm.bv_val,
 909                                 li->li_acl_authcID.bv_val,
 910                                 li->li_acl_passwd.bv_val,
 911                                 NULL );
 912
 913                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
 914                                 li->li_acl_authcDN.bv_val,
 915                                 li->li_acl_sasl_mech.bv_val, NULL, NULL,
 916                                 LDAP_SASL_QUIET, lutil_sasl_interact,
 917                                 defaults );
 918
 919                 lutil_sasl_freedefs( defaults );
 920
 921                 rs->sr_err = slap_map_api2result( rs );
 922                 if ( rs->sr_err != LDAP_SUCCESS ) {
 923                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 924                         send_ldap_result( op, rs );
 925
 926                 } else {
 927                         LDAP_BACK_CONN_ISBOUND_SET( lc );
 928                 }
 929                 goto done;
 930         }
 931 #endif /* HAVE_CYRUS_SASL */
 932
 933 retry:;
 934         rs->sr_err = ldap_sasl_bind( lc->lc_ld,
 935                         lc->lc_bound_ndn.bv_val,
 936                         LDAP_SASL_SIMPLE, &lc->lc_cred,
 937                         NULL, NULL, &msgid );
 938
 939         if ( rs->sr_err == LDAP_SERVER_DOWN ) {
 940                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 941                         if ( dolock ) {
 942                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 943                         }
 944
 945                         assert( lc->lc_refcnt > 0 );
 946                         if ( lc->lc_refcnt == 1 ) {
 947                                 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
 948                                 lc->lc_ld = NULL;
 949
 950                                 /* lc here must be the regular lc, reset and ready for init */
 951                                 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
 952                                 if ( rs->sr_err != LDAP_SUCCESS ) {
 953                                         lc->lc_binding--;
 954                                         lc->lc_refcnt = 0;
 955                                 }
 956                         }
 957
 958                         if ( dolock ) {
 959                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 960                         }
 961
 962                         if ( rs->sr_err == LDAP_SUCCESS ) {
 963                                 if ( retries > 0 ) {
 964                                         retries--;
 965                                 }
 966                                 goto retry;
 967                         }
 968
 969                 } else {
 970                         if ( dolock ) {
 971                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 972                         }
 973                         lc->lc_binding--;
 974                         if ( dolock ) {
 975                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 976                         }
 977                 }
 978
 979                 ldap_back_freeconn( op, lc, dolock );
 980                 rs->sr_err = slap_map_api2result( rs );
 981
 982                 return 0;
 983         }
 984
 985         rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
 986         if ( rc == LDAP_SUCCESS ) {
 987                 LDAP_BACK_CONN_ISBOUND_SET( lc );
 988         }
 989
 990 done:;
 991         lc->lc_binding--;
 992         LDAP_BACK_CONN_BINDING_CLEAR( lc );
 993         rc = LDAP_BACK_CONN_ISBOUND( lc );
 994         if ( !rc ) {
 995                 ldap_back_release_conn_lock( op, rs, lc, dolock );
 996         }
 997
 998         return rc;
 999 }
1000
1001 int
1002 ldap_back_dobind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1003 {
1004         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1005
1006         return ldap_back_dobind_int( lc, op, rs, sendok, li->li_nretries, 1 );
1007 }
1008
1009 /*
1010  * ldap_back_default_rebind
1011  *
1012  * This is a callback used for chasing referrals using the same
1013  * credentials as the original user on this session.
1014  */
1015 static int
1016 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
1017         ber_int_t msgid, void *params )
1018 {
1019         ldapconn_t      *lc = (ldapconn_t *)params;
1020
1021 #ifdef HAVE_TLS
1022         /* ... otherwise we couldn't get here */
1023         assert( lc != NULL );
1024
1025         if ( !ldap_tls_inplace( ld ) ) {
1026                 int             is_tls = LDAP_BACK_CONN_ISTLS( lc ),
1027                                 rc;
1028                 const char      *text = NULL;
1029
1030                 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
1031                         LDAP_BACK_RETRY_DEFAULT, &text );
1032                 if ( rc != LDAP_SUCCESS ) {
1033                         return rc;
1034                 }
1035         }
1036 #endif /* HAVE_TLS */
1037
1038         /* FIXME: add checks on the URL/identity? */
1039
1040         return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
1041                         LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
1042 }
1043
1044 int
1045 ldap_back_op_result(
1046                 ldapconn_t              *lc,
1047                 Operation               *op,
1048                 SlapReply               *rs,
1049                 ber_int_t               msgid,
1050                 time_t                  timeout,
1051                 ldap_back_send_t        sendok )
1052 {
1053         char            *match = NULL;
1054         LDAPMessage     *res = NULL;
1055         char            *text = NULL;
1056
1057 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
1058
1059         rs->sr_text = NULL;
1060         rs->sr_matched = NULL;
1061
1062         /* if the error recorded in the reply corresponds
1063          * to a successful state, get the error from the
1064          * remote server response */
1065         if ( ERR_OK( rs->sr_err ) ) {
1066                 int             rc;
1067                 struct timeval  tv;
1068
1069                 if ( timeout ) {
1070                         tv.tv_sec = timeout;
1071                         tv.tv_usec = 0;
1072
1073                 } else {
1074                         LDAP_BACK_TV_SET( &tv );
1075                 }
1076
1077 retry:;
1078                 /* if result parsing fails, note the failure reason */
1079                 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1080                 switch ( rc ) {
1081                 case 0:
1082                         if ( timeout ) {
1083                                 (void)ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
1084                                 rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
1085                                         LDAP_ADMINLIMIT_EXCEEDED : LDAP_OPERATIONS_ERROR;
1086                                 rs->sr_text = "Operation timed out";
1087                                 break;
1088                         }
1089
1090                         LDAP_BACK_TV_SET( &tv );
1091                         ldap_pvt_thread_yield();
1092                         goto retry;
1093
1094                 case -1:
1095                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
1096                                         &rs->sr_err );
1097                         break;
1098
1099
1100                 /* otherwise get the result; if it is not
1101                  * LDAP_SUCCESS, record it in the reply
1102                  * structure (this includes
1103                  * LDAP_COMPARE_{TRUE|FALSE}) */
1104                 default:
1105                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
1106                                         &match, &text, NULL, NULL, 1 );
1107                         rs->sr_text = text;
1108                         if ( rc != LDAP_SUCCESS ) {
1109                                 rs->sr_err = rc;
1110                         }
1111                 }
1112         }
1113
1114         /* if the error in the reply structure is not
1115          * LDAP_SUCCESS, try to map it from client
1116          * to server error */
1117         if ( !ERR_OK( rs->sr_err ) ) {
1118                 rs->sr_err = slap_map_api2result( rs );
1119
1120                 /* internal ops ( op->o_conn == NULL )
1121                  * must not reply to client */
1122                 if ( op->o_conn && !op->o_do_not_cache && match ) {
1123
1124                         /* record the (massaged) matched
1125                          * DN into the reply structure */
1126                         rs->sr_matched = match;
1127                 }
1128         }
1129         if ( op->o_conn &&
1130                         ( ( sendok & LDAP_BACK_SENDOK )
1131                           || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1132         {
1133                 send_ldap_result( op, rs );
1134         }
1135         if ( match ) {
1136                 if ( rs->sr_matched != match ) {
1137                         free( (char *)rs->sr_matched );
1138                 }
1139                 rs->sr_matched = NULL;
1140                 ldap_memfree( match );
1141         }
1142         if ( text ) {
1143                 ldap_memfree( text );
1144         }
1145         rs->sr_text = NULL;
1146         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1147 }
1148
1149 /* return true if bound, false if failed */
1150 int
1151 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1152 {
1153         int             rc = 0;
1154         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1155
1156         assert( lcp != NULL );
1157         assert( *lcp != NULL );
1158
1159         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1160
1161         if ( (*lcp)->lc_refcnt == 1 ) {
1162                 Debug( LDAP_DEBUG_ANY,
1163                         "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
1164                         op->o_log_prefix, li->li_uri,
1165                         BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
1166                                 "" : (*lcp)->lc_bound_ndn.bv_val );
1167
1168                 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
1169                 (*lcp)->lc_ld = NULL;
1170                 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
1171
1172                 /* lc here must be the regular lc, reset and ready for init */
1173                 rc = ldap_back_prepare_conn( lcp, op, rs, sendok );
1174                 if ( rc != LDAP_SUCCESS ) {
1175                         rc = 0;
1176                         *lcp = NULL;
1177
1178                 } else {
1179                         rc = ldap_back_dobind_int( *lcp, op, rs, sendok, 0, 0 );
1180                         if ( rc == 0 ) {
1181                                 *lcp = NULL;
1182                         }
1183                 }
1184
1185         } else {
1186                 Debug( LDAP_DEBUG_TRACE,
1187                         "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
1188                         (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
1189
1190                 ldap_back_release_conn_lock( op, rs, *lcp, 0 );
1191                 *lcp = NULL;
1192
1193                 if ( sendok ) {
1194                         rs->sr_err = LDAP_UNAVAILABLE;
1195                         rs->sr_text = "unable to retry";
1196                         send_ldap_result( op, rs );
1197                 }
1198         }
1199
1200         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1201
1202         return rc;
1203 }
1204
1205 static int
1206 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1207 {
1208         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1209         struct berval   binddn = slap_empty_bv;
1210         struct berval   bindcred = slap_empty_bv;
1211         struct berval   ndn;
1212         int             dobind = 0;
1213         int             msgid;
1214         int             rc;
1215
1216         /* don't proxyAuthz if protocol is not LDAPv3 */
1217         switch ( li->li_version ) {
1218         case LDAP_VERSION3:
1219                 break;
1220
1221         case 0:
1222                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1223                         break;
1224                 }
1225                 /* fall thru */
1226
1227         default:
1228                 goto done;
1229         }
1230
1231         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1232                 ndn = op->o_conn->c_ndn;
1233
1234         } else {
1235                 ndn = op->o_ndn;
1236         }
1237
1238         /*
1239          * FIXME: we need to let clients use proxyAuthz
1240          * otherwise we cannot do symmetric pools of servers;
1241          * we have to live with the fact that a user can
1242          * authorize itself as any ID that is allowed
1243          * by the authzTo directive of the "proxyauthzdn".
1244          */
1245         /*
1246          * NOTE: current Proxy Authorization specification
1247          * and implementation do not allow proxy authorization
1248          * control to be provided with Bind requests
1249          */
1250         /*
1251          * if no bind took place yet, but the connection is bound
1252          * and the "proxyauthzdn" is set, then bind as
1253          * "proxyauthzdn" and explicitly add the proxyAuthz
1254          * control to every operation with the dn bound
1255          * to the connection as control value.
1256          */
1257
1258         /* bind as proxyauthzdn only if no idassert mode
1259          * is requested, or if the client's identity
1260          * is authorized */
1261         switch ( li->li_idassert_mode ) {
1262         case LDAP_BACK_IDASSERT_LEGACY:
1263                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1264                         if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
1265                         {
1266                                 binddn = li->li_idassert_authcDN;
1267                                 bindcred = li->li_idassert_passwd;
1268                                 dobind = 1;
1269                         }
1270                 }
1271                 break;
1272
1273         default:
1274                 /* NOTE: rootdn can always idassert */
1275                 if ( BER_BVISNULL( &ndn ) && li->li_idassert_authz == NULL ) {
1276                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1277                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1278                                 if ( sendok & LDAP_BACK_SENDERR ) {
1279                                         send_ldap_result( op, rs );
1280                                 }
1281                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1282
1283                         } else {
1284                                 rs->sr_err = LDAP_SUCCESS;
1285                                 binddn = slap_empty_bv;
1286                                 bindcred = slap_empty_bv;
1287                                 break;
1288                         }
1289
1290                         goto done;
1291
1292                 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1293                         struct berval authcDN;
1294
1295                         if ( BER_BVISNULL( &ndn ) ) {
1296                                 authcDN = slap_empty_bv;
1297
1298                         } else {
1299                                 authcDN = ndn;
1300                         }
1301                         rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
1302                                         &authcDN, &authcDN );
1303                         if ( rs->sr_err != LDAP_SUCCESS ) {
1304                                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1305                                         if ( sendok & LDAP_BACK_SENDERR ) {
1306                                                 send_ldap_result( op, rs );
1307                                         }
1308                                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1309
1310                                 } else {
1311                                         rs->sr_err = LDAP_SUCCESS;
1312                                         binddn = slap_empty_bv;
1313                                         bindcred = slap_empty_bv;
1314                                         break;
1315                                 }
1316
1317                                 goto done;
1318                         }
1319                 }
1320
1321                 binddn = li->li_idassert_authcDN;
1322                 bindcred = li->li_idassert_passwd;
1323                 dobind = 1;
1324                 break;
1325         }
1326
1327         if ( dobind && li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1328 #ifdef HAVE_CYRUS_SASL
1329                 void            *defaults = NULL;
1330                 struct berval   authzID = BER_BVNULL;
1331                 int             freeauthz = 0;
1332
1333                 /* if SASL supports native authz, prepare for it */
1334                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1335                                 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1336                 {
1337                         switch ( li->li_idassert_mode ) {
1338                         case LDAP_BACK_IDASSERT_OTHERID:
1339                         case LDAP_BACK_IDASSERT_OTHERDN:
1340                                 authzID = li->li_idassert_authzID;
1341                                 break;
1342
1343                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1344                                 BER_BVSTR( &authzID, "dn:" );
1345                                 break;
1346
1347                         case LDAP_BACK_IDASSERT_SELF:
1348                                 if ( BER_BVISNULL( &ndn ) ) {
1349                                         /* connection is not authc'd, so don't idassert */
1350                                         BER_BVSTR( &authzID, "dn:" );
1351                                         break;
1352                                 }
1353                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1354                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1355                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1356                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1357                                                 ndn.bv_val, ndn.bv_len + 1 );
1358                                 freeauthz = 1;
1359                                 break;
1360
1361                         default:
1362                                 break;
1363                         }
1364                 }
1365
1366                 if ( li->li_idassert_secprops != NULL ) {
1367                         rs->sr_err = ldap_set_option( lc->lc_ld,
1368                                 LDAP_OPT_X_SASL_SECPROPS,
1369                                 (void *)li->li_idassert_secprops );
1370
1371                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1372                                 rs->sr_err = LDAP_OTHER;
1373                                 if ( sendok & LDAP_BACK_SENDERR ) {
1374                                         send_ldap_result( op, rs );
1375                                 }
1376                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1377                                 goto done;
1378                         }
1379                 }
1380
1381                 defaults = lutil_sasl_defaults( lc->lc_ld,
1382                                 li->li_idassert_sasl_mech.bv_val,
1383                                 li->li_idassert_sasl_realm.bv_val,
1384                                 li->li_idassert_authcID.bv_val,
1385                                 li->li_idassert_passwd.bv_val,
1386                                 authzID.bv_val );
1387
1388                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1389                                 li->li_idassert_sasl_mech.bv_val, NULL, NULL,
1390                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1391                                 defaults );
1392
1393                 rs->sr_err = slap_map_api2result( rs );
1394                 if ( rs->sr_err != LDAP_SUCCESS ) {
1395                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1396                         if ( sendok & LDAP_BACK_SENDERR ) {
1397                                 send_ldap_result( op, rs );
1398                         }
1399
1400                 } else {
1401                         LDAP_BACK_CONN_ISBOUND_SET( lc );
1402                 }
1403
1404                 lutil_sasl_freedefs( defaults );
1405                 if ( freeauthz ) {
1406                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1407                 }
1408
1409                 goto done;
1410 #endif /* HAVE_CYRUS_SASL */
1411         }
1412
1413         switch ( li->li_idassert_authmethod ) {
1414         case LDAP_AUTH_NONE:
1415                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1416                 goto done;
1417
1418         case LDAP_AUTH_SIMPLE:
1419                 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1420                                 binddn.bv_val, LDAP_SASL_SIMPLE,
1421                                 &bindcred, NULL, NULL, &msgid );
1422                 break;
1423
1424         default:
1425                 /* unsupported! */
1426                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1427                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1428                 if ( sendok & LDAP_BACK_SENDERR ) {
1429                         send_ldap_result( op, rs );
1430                 }
1431                 goto done;
1432         }
1433
1434         rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
1435         if ( rc == LDAP_SUCCESS ) {
1436                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1437         }
1438 done:;
1439         return LDAP_BACK_CONN_ISBOUND( lc );
1440 }
1441
1442 /*
1443  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1444  * to existing server-side controls if required; if not,
1445  * the existing server-side controls are placed in *pctrls.
1446  * The caller, after using the controls in client API
1447  * operations, if ( *pctrls != op->o_ctrls ), should
1448  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1449  * The function returns success if the control could
1450  * be added if required, or if it did nothing; in the future,
1451  * it might return some error if it failed.
1452  *
1453  * if no bind took place yet, but the connection is bound
1454  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1455  * and explicitly add proxyAuthz the control to every operation
1456  * with the dn bound to the connection as control value.
1457  *
1458  * If no server-side controls are defined for the operation,
1459  * simply add the proxyAuthz control; otherwise, if the
1460  * proxyAuthz control is not already set, add it as
1461  * the first one
1462  *
1463  * FIXME: is controls order significant for security?
1464  * ANSWER: controls ordering and interoperability
1465  * must be indicated by the specs of each control; if none
1466  * is specified, the order is irrelevant.
1467  */
1468 int
1469 ldap_back_proxy_authz_ctrl(
1470                 ldapconn_t      *lc,
1471                 Operation       *op,
1472                 SlapReply       *rs,
1473                 LDAPControl     ***pctrls )
1474 {
1475         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
1476         LDAPControl     **ctrls = NULL;
1477         int             i = 0,
1478                         mode;
1479         struct berval   assertedID,
1480                         ndn;
1481
1482         *pctrls = NULL;
1483
1484         rs->sr_err = LDAP_SUCCESS;
1485
1486         /* don't proxyAuthz if protocol is not LDAPv3 */
1487         switch ( li->li_version ) {
1488         case LDAP_VERSION3:
1489                 break;
1490
1491         case 0:
1492                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1493                         break;
1494                 }
1495                 /* fall thru */
1496
1497         default:
1498                 goto done;
1499         }
1500
1501         /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1502          * but if it is not set this test fails.  We need a different
1503          * means to detect if idassert is enabled */
1504         if ( ( BER_BVISNULL( &li->li_idassert_authcID ) || BER_BVISEMPTY( &li->li_idassert_authcID ) )
1505                         && ( BER_BVISNULL( &li->li_idassert_authcDN ) || BER_BVISEMPTY( &li->li_idassert_authcDN ) ) )
1506         {
1507                 goto done;
1508         }
1509
1510         if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1511                 goto done;
1512         }
1513
1514         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1515                 ndn = op->o_conn->c_ndn;
1516
1517         } else {
1518                 ndn = op->o_ndn;
1519         }
1520
1521         if ( li->li_idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1522                 if ( op->o_proxy_authz ) {
1523                         /*
1524                          * FIXME: we do not want to perform proxyAuthz
1525                          * on behalf of the client, because this would
1526                          * be performed with "proxyauthzdn" privileges.
1527                          *
1528                          * This might actually be too strict, since
1529                          * the "proxyauthzdn" authzTo, and each entry's
1530                          * authzFrom attributes may be crafted
1531                          * to avoid unwanted proxyAuthz to take place.
1532                          */
1533 #if 0
1534                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1535                         rs->sr_text = "proxyAuthz not allowed within namingContext";
1536 #endif
1537                         goto done;
1538                 }
1539
1540                 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1541                         goto done;
1542                 }
1543
1544                 if ( BER_BVISNULL( &ndn ) ) {
1545                         goto done;
1546                 }
1547
1548                 if ( BER_BVISNULL( &li->li_idassert_authcDN ) ) {
1549                         goto done;
1550                 }
1551
1552         } else if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1553                 if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1554                                 /* && ( !BER_BVISNULL( &ndn )
1555                                         || LDAP_BACK_CONN_ISBOUND( lc ) ) */ )
1556                 {
1557                         /* already asserted in SASL via native authz */
1558                         /* NOTE: the test on lc->lc_bound is used to trap
1559                          * native authorization of anonymous users,
1560                          * since in that case ndn is NULL */
1561                         goto done;
1562                 }
1563
1564         } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1565                 int             rc;
1566                 struct berval authcDN;
1567
1568                 if ( BER_BVISNULL( &ndn ) ) {
1569                         authcDN = slap_empty_bv;
1570                 } else {
1571                         authcDN = ndn;
1572                 }
1573                 rc = slap_sasl_matches( op, li->li_idassert_authz,
1574                                 &authcDN, & authcDN );
1575                 if ( rc != LDAP_SUCCESS ) {
1576                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1577                         {
1578                                 /* ndn is not authorized
1579                                  * to use idassert */
1580                                 rs->sr_err = rc;
1581                         }
1582                         goto done;
1583                 }
1584         }
1585
1586         if ( op->o_proxy_authz ) {
1587                 /*
1588                  * FIXME: we can:
1589                  * 1) ignore the already set proxyAuthz control
1590                  * 2) leave it in place, and don't set ours
1591                  * 3) add both
1592                  * 4) reject the operation
1593                  *
1594                  * option (4) is very drastic
1595                  * option (3) will make the remote server reject
1596                  * the operation, thus being equivalent to (4)
1597                  * option (2) will likely break the idassert
1598                  * assumptions, so we cannot accept it;
1599                  * option (1) means that we are contradicting
1600                  * the client's reques.
1601                  *
1602                  * I think (4) is the only correct choice.
1603                  */
1604                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1605                 rs->sr_text = "proxyAuthz not allowed within namingContext";
1606         }
1607
1608         if ( op->o_is_auth_check ) {
1609                 mode = LDAP_BACK_IDASSERT_NOASSERT;
1610
1611         } else {
1612                 mode = li->li_idassert_mode;
1613         }
1614
1615         switch ( mode ) {
1616         case LDAP_BACK_IDASSERT_SELF:
1617                 if ( BER_BVISNULL( &ndn ) ) {
1618                         goto done;
1619                 }
1620                 assertedID = ndn;
1621                 break;
1622
1623         case LDAP_BACK_IDASSERT_LEGACY:
1624                 /* original behavior:
1625                  * assert the client's identity */
1626                 if ( BER_BVISNULL( &ndn ) ) {
1627                         assertedID = slap_empty_bv;
1628                 } else {
1629                         assertedID = ndn;
1630                 }
1631                 break;
1632
1633         case LDAP_BACK_IDASSERT_ANONYMOUS:
1634                 /* assert "anonymous" */
1635                 assertedID = slap_empty_bv;
1636                 break;
1637
1638         case LDAP_BACK_IDASSERT_NOASSERT:
1639                 /* don't assert; bind as proxyauthzdn */
1640                 goto done;
1641
1642         case LDAP_BACK_IDASSERT_OTHERID:
1643         case LDAP_BACK_IDASSERT_OTHERDN:
1644                 /* assert idassert DN */
1645                 assertedID = li->li_idassert_authzID;
1646                 break;
1647
1648         default:
1649                 assert( 0 );
1650         }
1651
1652         if ( BER_BVISNULL( &assertedID ) ) {
1653                 assertedID = slap_empty_bv;
1654         }
1655
1656         if ( op->o_ctrls ) {
1657                 for ( i = 0; op->o_ctrls[ i ]; i++ )
1658                         /* just count ctrls */ ;
1659         }
1660
1661         ctrls = op->o_tmpalloc( sizeof( LDAPControl * ) * (i + 2) + sizeof( LDAPControl ),
1662                         op->o_tmpmemctx );
1663         ctrls[ 0 ] = (LDAPControl *)&ctrls[ i + 2 ];
1664
1665         ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1666         ctrls[ 0 ]->ldctl_iscritical = 1;
1667
1668         switch ( li->li_idassert_mode ) {
1669         /* already in u:ID or dn:DN form */
1670         case LDAP_BACK_IDASSERT_OTHERID:
1671         case LDAP_BACK_IDASSERT_OTHERDN:
1672                 ber_dupbv_x( &ctrls[ 0 ]->ldctl_value, &assertedID, op->o_tmpmemctx );
1673                 break;
1674
1675         /* needs the dn: prefix */
1676         default:
1677                 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1678                 ctrls[ 0 ]->ldctl_value.bv_val = op->o_tmpalloc( ctrls[ 0 ]->ldctl_value.bv_len + 1,
1679                                 op->o_tmpmemctx );
1680                 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1681                 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1682                                 assertedID.bv_val, assertedID.bv_len + 1 );
1683                 break;
1684         }
1685
1686         /* Older versions of <draft-weltman-ldapv3-proxy> required
1687          * to encode the value of the authzID (and called it proxyDN);
1688          * this hack provides compatibility with those DSAs that
1689          * implement it this way */
1690         if ( li->li_idassert_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
1691                 struct berval           authzID = ctrls[ 0 ]->ldctl_value;
1692                 BerElementBuffer        berbuf;
1693                 BerElement              *ber = (BerElement *)&berbuf;
1694                 ber_tag_t               tag;
1695
1696                 ber_init2( ber, 0, LBER_USE_DER );
1697                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
1698
1699                 tag = ber_printf( ber, "O", &authzID );
1700                 if ( tag == LBER_ERROR ) {
1701                         rs->sr_err = LDAP_OTHER;
1702                         goto free_ber;
1703                 }
1704
1705                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
1706                         rs->sr_err = LDAP_OTHER;
1707                         goto free_ber;
1708                 }
1709
1710 free_ber:;
1711                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
1712                 ber_free_buf( ber );
1713
1714                 if ( rs->sr_err != LDAP_SUCCESS ) {
1715                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
1716                         ctrls = NULL;
1717                 }
1718
1719         } else if ( li->li_idassert_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
1720                 struct berval           authzID = ctrls[ 0 ]->ldctl_value,
1721                                         tmp;
1722                 BerElementBuffer        berbuf;
1723                 BerElement              *ber = (BerElement *)&berbuf;
1724                 ber_tag_t               tag;
1725
1726                 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
1727                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
1728                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
1729                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1730                         goto done;
1731                 }
1732
1733                 tmp = authzID;
1734                 tmp.bv_val += STRLENOF( "dn:" );
1735                 tmp.bv_len -= STRLENOF( "dn:" );
1736
1737                 ber_init2( ber, 0, LBER_USE_DER );
1738                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
1739
1740                 /* apparently, Mozilla API encodes this
1741                  * as "SEQUENCE { LDAPDN }" */
1742                 tag = ber_printf( ber, "{O}", &tmp );
1743                 if ( tag == LBER_ERROR ) {
1744                         rs->sr_err = LDAP_OTHER;
1745                         goto free_ber2;
1746                 }
1747
1748                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
1749                         rs->sr_err = LDAP_OTHER;
1750                         goto free_ber2;
1751                 }
1752
1753 free_ber2:;
1754                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
1755                 ber_free_buf( ber );
1756
1757                 if ( rs->sr_err != LDAP_SUCCESS ) {
1758                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
1759                         ctrls = NULL;
1760                         goto done;
1761                 }
1762
1763                 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
1764         }
1765
1766         if ( op->o_ctrls ) {
1767                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1768                         ctrls[ i + 1 ] = op->o_ctrls[ i ];
1769                 }
1770         }
1771         ctrls[ i + 1 ] = NULL;
1772
1773 done:;
1774         if ( ctrls == NULL ) {
1775                 ctrls = op->o_ctrls;
1776         }
1777
1778         *pctrls = ctrls;
1779
1780         return rs->sr_err;
1781 }
1782
1783 int
1784 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1785 {
1786         LDAPControl     **ctrls = *pctrls;
1787
1788         /* we assume that the first control is the proxyAuthz
1789          * added by back-ldap, so it's the only one we explicitly
1790          * free */
1791         if ( ctrls && ctrls != op->o_ctrls ) {
1792                 assert( ctrls[ 0 ] != NULL );
1793
1794                 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1795                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
1796                 }
1797
1798                 op->o_tmpfree( ctrls, op->o_tmpmemctx );
1799         }
1800
1801         *pctrls = NULL;
1802
1803         return 0;
1804 }