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 #if PRINT_CONNTREE > 0
  45 static void
  46 ravl_print( Avlnode *root, int depth )
  47 {
  48         int             i;
  49         ldapconn_t      *lc;
  50
  51         if ( root == 0 ) {
  52                 return;
  53         }
  54
  55         ravl_print( root->avl_right, depth+1 );
  56
  57         for ( i = 0; i < depth; i++ ) {
  58                 fprintf( stderr, "-" );
  59         }
  60
  61         lc = root->avl_data;
  62         fprintf( stderr, "lc=%p local=\"%s\" conn=%p %s refcnt=%d\n",
  63                 (void *)lc, lc->lc_local_ndn.bv_val, (void *)lc->lc_conn,
  64                 avl_bf2str( root->avl_bf ), lc->lc_refcnt );
  65
  66         ravl_print( root->avl_left, depth+1 );
  67 }
  68
  69 static void
  70 myprint( Avlnode *root, char *msg )
  71 {
  72         fprintf( stderr, "========> %s\n", msg );
  73
  74         if ( root == 0 ) {
  75                 fprintf( stderr, "\tNULL\n" );
  76
  77         } else {
  78                 ravl_print( root, 0 );
  79         }
  80
  81         fprintf( stderr, "<======== %s\n", msg );
  82 }
  83 #endif /* PRINT_CONNTREE */
  84
  85 static int
  86 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
  87
  88 static int
  89 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
  90
  91 static int
  92 ldap_back_conndnlc_cmp( const void *c1, const void *c2 );
  93
  94 int
  95 ldap_back_bind( Operation *op, SlapReply *rs )
  96 {
  97         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
  98         ldapconn_t      *lc;
  99
 100         int rc = 0;
 101         ber_int_t msgid;
 102
 103         lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR );
 104         if ( !lc ) {
 105                 return rs->sr_err;
 106         }
 107
 108         if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
 109                 ch_free( lc->lc_bound_ndn.bv_val );
 110                 BER_BVZERO( &lc->lc_bound_ndn );
 111         }
 112         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 113
 114         /* method is always LDAP_AUTH_SIMPLE if we got here */
 115         rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
 116                         LDAP_SASL_SIMPLE,
 117                         &op->orb_cred, op->o_ctrls, NULL, &msgid );
 118         rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_SENDERR );
 119
 120         if ( rc == LDAP_SUCCESS ) {
 121                 /* If defined, proxyAuthz will be used also when
 122                  * back-ldap is the authorizing backend; for this
 123                  * purpose, a successful bind is followed by a
 124                  * bind with the configured identity assertion */
 125                 /* NOTE: use with care */
 126                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 127                         ldap_back_proxy_authz_bind( lc, op, rs, LDAP_BACK_SENDERR );
 128                         if ( !LDAP_BACK_CONN_ISBOUND( lc ) ) {
 129                                 rc = 1;
 130                                 goto done;
 131                         }
 132                 }
 133
 134                 LDAP_BACK_CONN_ISBOUND_SET( lc );
 135                 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
 136
 137                 if ( LDAP_BACK_SAVECRED( li ) ) {
 138                         if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 139                                 memset( lc->lc_cred.bv_val, 0,
 140                                                 lc->lc_cred.bv_len );
 141                         }
 142                         ber_bvreplace( &lc->lc_cred, &op->orb_cred );
 143                         ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
 144                 }
 145         }
 146 done:;
 147
 148         assert( lc->lc_binding == 1 );
 149         lc->lc_binding = 0;
 150
 151         /* must re-insert if local DN changed as result of bind */
 152         if ( !LDAP_BACK_CONN_ISBOUND( lc )
 153                 || ( LDAP_BACK_CONN_ISBOUND( lc )
 154                         && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) ) )
 155         {
 156                 int             lerr = -1;
 157                 ldapconn_t      *tmplc;
 158
 159                 /* wait for all other ops to release the connection */
 160 retry_lock:;
 161                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 162                 if ( lc->lc_refcnt > 1 ) {
 163                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 164                         ldap_pvt_thread_yield();
 165                         goto retry_lock;
 166                 }
 167
 168                 assert( lc->lc_refcnt == 1 );
 169                 tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 170                                 ldap_back_conndnlc_cmp );
 171                 assert( tmplc == NULL || lc == tmplc );
 172
 173                 /* delete all cached connections with the current connection */
 174                 if ( LDAP_BACK_SINGLECONN( li ) ) {
 175                         while ( ( tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, ldap_back_conn_cmp ) ) != NULL )
 176                         {
 177                                 Debug( LDAP_DEBUG_TRACE,
 178                                         "=>ldap_back_bind: destroying conn %ld (refcnt=%u)\n",
 179                                         LDAP_BACK_PCONN_ID( lc->lc_conn ), lc->lc_refcnt, 0 );
 180
 181                                 if ( lc->lc_refcnt != 0 ) {
 182                                         /* taint it */
 183                                         LDAP_BACK_CONN_TAINTED_SET( tmplc );
 184
 185                                 } else {
 186                                         /*
 187                                          * Needs a test because the handler may be corrupted,
 188                                          * and calling ldap_unbind on a corrupted header results
 189                                          * in a segmentation fault
 190                                          */
 191                                         ldap_back_conn_free( tmplc );
 192                                 }
 193                         }
 194                 }
 195
 196                 if ( LDAP_BACK_CONN_ISBOUND( lc ) ) {
 197                         ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
 198                         lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 199                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 200                 }
 201
 202 #if PRINT_CONNTREE > 0
 203                 myprint( li->li_conninfo.lai_tree, "ldap_back_bind" );
 204 #endif /* PRINT_CONNTREE */
 205
 206                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 207                 switch ( lerr ) {
 208                 case 0:
 209                         break;
 210
 211                 case -1:
 212                         /* duplicate; someone else successfully bound
 213                          * on the same connection with the same identity;
 214                          * we can do this because lc_refcnt == 1 */
 215                         ldap_back_conn_free( lc );
 216                         lc = NULL;
 217                 }
 218         }
 219
 220         if ( lc != NULL ) {
 221                 ldap_back_release_conn( op, rs, lc );
 222         }
 223
 224         return( rc );
 225 }
 226
 227 /*
 228  * ldap_back_conndn_cmp
 229  *
 230  * compares two ldapconn_t based on the value of the conn pointer
 231  * and of the local DN; used by avl stuff for insert, lookup
 232  * and direct delete
 233  */
 234 int
 235 ldap_back_conndn_cmp( const void *c1, const void *c2 )
 236 {
 237         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 238         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 239         int rc;
 240
 241         /* If local DNs don't match, it is definitely not a match */
 242         /* For shared sessions, conn is NULL. Only explicitly
 243          * bound sessions will have non-NULL conn.
 244          */
 245         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 246         if ( rc == 0 ) {
 247                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 248         }
 249
 250         return rc;
 251 }
 252
 253 /*
 254  * ldap_back_conndnlc_cmp
 255  *
 256  * compares two ldapconn_t based on the value of the conn pointer,
 257  * the local DN and the lc pointer; used by avl stuff for insert, lookup
 258  * and direct delete
 259  */
 260 static int
 261 ldap_back_conndnlc_cmp( const void *c1, const void *c2 )
 262 {
 263         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 264         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 265         int rc;
 266
 267         /* If local DNs don't match, it is definitely not a match */
 268         /* For shared sessions, conn is NULL. Only explicitly
 269          * bound sessions will have non-NULL conn.
 270          */
 271         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 272         if ( rc == 0 ) {
 273                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 274                 if ( rc == 0 ) {
 275                         rc = SLAP_PTRCMP( lc1, lc2 );
 276                 }
 277         }
 278
 279         return rc;
 280 }
 281
 282 /*
 283  * ldap_back_conn_cmp
 284  *
 285  * compares two ldapconn_t based on the value of the conn pointer;
 286  * used by avl stuff for delete of all conns with the same connid
 287  */
 288 int
 289 ldap_back_conn_cmp( const void *c1, const void *c2 )
 290 {
 291         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 292         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 293
 294         /* For shared sessions, conn is NULL. Only explicitly
 295          * bound sessions will have non-NULL conn.
 296          */
 297         return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 298 }
 299
 300 /*
 301  * ldap_back_conndn_dup
 302  *
 303  * returns -1 in case a duplicate ldapconn_t has been inserted;
 304  * used by avl stuff
 305  */
 306 int
 307 ldap_back_conndn_dup( void *c1, void *c2 )
 308 {
 309         ldapconn_t      *lc1 = (ldapconn_t *)c1;
 310         ldapconn_t      *lc2 = (ldapconn_t *)c2;
 311
 312         /* Cannot have more than one shared session with same DN */
 313         if ( lc1->lc_conn == lc2->lc_conn &&
 314                 dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) )
 315         {
 316                 return -1;
 317         }
 318
 319         return 0;
 320 }
 321
 322 int
 323 ldap_back_freeconn( Operation *op, ldapconn_t *lc, int dolock )
 324 {
 325         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 326         ldapconn_t      *tmplc;
 327
 328         if ( dolock ) {
 329                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 330         }
 331
 332         tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 333                         ldap_back_conndnlc_cmp );
 334         assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc );
 335         if ( lc->lc_refcnt == 0 ) {
 336                 ldap_back_conn_free( (void *)lc );
 337         }
 338
 339         if ( dolock ) {
 340                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 341         }
 342
 343         return 0;
 344 }
 345
 346 #ifdef HAVE_TLS
 347 static int
 348 ldap_back_start_tls(
 349         LDAP            *ld,
 350         int             protocol,
 351         int             *is_tls,
 352         const char      *url,
 353         unsigned        flags,
 354         int             retries,
 355         const char      **text )
 356 {
 357         int             rc = LDAP_SUCCESS;
 358         ldapinfo_t      dummy;
 359
 360         /* this is ridiculous... */
 361         dummy.li_flags = flags;
 362
 363         /* start TLS ("tls-[try-]{start,propagate}" statements) */
 364         if ( ( LDAP_BACK_USE_TLS( &dummy ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &dummy ) ) )
 365                                 && !ldap_is_ldaps_url( url ) )
 366         {
 367 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
 368                 /*
 369                  * use asynchronous StartTLS
 370                  * in case, chase referral (not implemented yet)
 371                  */
 372                 int             msgid;
 373
 374                 if ( protocol == 0 ) {
 375                         ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
 376                                         (void *)&protocol );
 377                 }
 378
 379                 if ( protocol < LDAP_VERSION3 ) {
 380                         /* we should rather bail out... */
 381                         rc = LDAP_UNWILLING_TO_PERFORM;
 382                         *text = "invalid protocol version";
 383                 }
 384
 385                 if ( rc == LDAP_SUCCESS ) {
 386                         rc = ldap_start_tls( ld, NULL, NULL, &msgid );
 387                 }
 388
 389                 if ( rc == LDAP_SUCCESS ) {
 390                         LDAPMessage     *res = NULL;
 391                         struct timeval  tv;
 392
 393                         LDAP_BACK_TV_SET( &tv );
 394
 395 retry:;
 396                         rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
 397                         if ( rc < 0 ) {
 398                                 rc = LDAP_UNAVAILABLE;
 399
 400                         } else if ( rc == 0 ) {
 401                                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 402                                         ldap_pvt_thread_yield();
 403                                         if ( retries > 0 ) {
 404                                                 retries--;
 405                                         }
 406                                         LDAP_BACK_TV_SET( &tv );
 407                                         goto retry;
 408                                 }
 409                                 rc = LDAP_UNAVAILABLE;
 410
 411                         } else if ( rc == LDAP_RES_EXTENDED ) {
 412                                 struct berval   *data = NULL;
 413
 414                                 rc = ldap_parse_extended_result( ld, res,
 415                                                 NULL, &data, 0 );
 416                                 if ( rc == LDAP_SUCCESS ) {
 417                                         int err;
 418                                         rc = ldap_parse_result( ld, res, &err,
 419                                                 NULL, NULL, NULL, NULL, 1 );
 420                                         if ( rc == LDAP_SUCCESS ) {
 421                                                 rc = err;
 422                                         }
 423                                         res = NULL;
 424
 425                                         /* FIXME: in case a referral
 426                                          * is returned, should we try
 427                                          * using it instead of the
 428                                          * configured URI? */
 429                                         if ( rc == LDAP_SUCCESS ) {
 430                                                 rc = ldap_install_tls( ld );
 431
 432                                         } else if ( rc == LDAP_REFERRAL ) {
 433                                                 rc = LDAP_UNWILLING_TO_PERFORM;
 434                                                 *text = "unwilling to chase referral returned by Start TLS exop";
 435                                         }
 436
 437                                         if ( data ) {
 438                                                 if ( data->bv_val ) {
 439                                                         ber_memfree( data->bv_val );
 440                                                 }
 441                                                 ber_memfree( data );
 442                                         }
 443                                 }
 444
 445                         } else {
 446                                 rc = LDAP_OTHER;
 447                         }
 448
 449                         if ( res != NULL ) {
 450                                 ldap_msgfree( res );
 451                         }
 452                 }
 453 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 454                 /*
 455                  * use synchronous StartTLS
 456                  */
 457                 rc = ldap_start_tls_s( ld, NULL, NULL );
 458 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 459
 460                 /* if StartTLS is requested, only attempt it if the URL
 461                  * is not "ldaps://"; this may occur not only in case
 462                  * of misconfiguration, but also when used in the chain
 463                  * overlay, where the "uri" can be parsed out of a referral */
 464                 switch ( rc ) {
 465                 case LDAP_SUCCESS:
 466                         *is_tls = 1;
 467                         break;
 468
 469                 case LDAP_SERVER_DOWN:
 470                         break;
 471
 472                 default:
 473                         if ( LDAP_BACK_TLS_CRITICAL( &dummy ) ) {
 474                                 *text = "could not start TLS";
 475                                 break;
 476                         }
 477
 478                         /* in case Start TLS is not critical */
 479                         *is_tls = 0;
 480                         rc = LDAP_SUCCESS;
 481                         break;
 482                 }
 483
 484         } else {
 485                 *is_tls = 0;
 486         }
 487
 488         return rc;
 489 }
 490 #endif /* HAVE_TLS */
 491
 492 static int
 493 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 494 {
 495         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 496         int             version;
 497         LDAP            *ld = NULL;
 498 #ifdef HAVE_TLS
 499         int             is_tls = op->o_conn->c_is_tls;
 500 #endif /* HAVE_TLS */
 501
 502         assert( lcp != NULL );
 503
 504         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 505         rs->sr_err = ldap_initialize( &ld, li->li_uri );
 506         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 507         if ( rs->sr_err != LDAP_SUCCESS ) {
 508                 goto error_return;
 509         }
 510
 511         if ( li->li_urllist_f ) {
 512                 ldap_set_urllist_proc( ld, li->li_urllist_f, li->li_urllist_p );
 513         }
 514
 515         /* Set LDAP version. This will always succeed: If the client
 516          * bound with a particular version, then so can we.
 517          */
 518         if ( li->li_version != 0 ) {
 519                 version = li->li_version;
 520
 521         } else if ( op->o_protocol != 0 ) {
 522                 version = op->o_protocol;
 523
 524         } else {
 525                 /* assume it's an internal op; set to LDAPv3 */
 526                 version = LDAP_VERSION3;
 527         }
 528         ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
 529
 530         /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
 531         ldap_set_option( ld, LDAP_OPT_REFERRALS,
 532                 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
 533
 534         if ( li->li_network_timeout > 0 ) {
 535                 struct timeval          tv;
 536
 537                 tv.tv_sec = li->li_network_timeout;
 538                 tv.tv_usec = 0;
 539                 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
 540         }
 541
 542 #ifdef HAVE_TLS
 543         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 544         rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
 545                         li->li_uri, li->li_flags, li->li_nretries, &rs->sr_text );
 546         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 547         if ( rs->sr_err != LDAP_SUCCESS ) {
 548                 ldap_unbind_ext( ld, NULL, NULL );
 549                 goto error_return;
 550         }
 551 #endif /* HAVE_TLS */
 552
 553         if ( *lcp == NULL ) {
 554                 *lcp = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
 555                 (*lcp)->lc_flags = li->li_flags;
 556         }
 557         (*lcp)->lc_ld = ld;
 558         (*lcp)->lc_refcnt = 1;
 559         (*lcp)->lc_binding = 1;
 560 #ifdef HAVE_TLS
 561         if ( is_tls ) {
 562                 LDAP_BACK_CONN_ISTLS_SET( *lcp );
 563         } else {
 564                 LDAP_BACK_CONN_ISTLS_CLEAR( *lcp );
 565         }
 566 #endif /* HAVE_TLS */
 567
 568 error_return:;
 569         if ( rs->sr_err != LDAP_SUCCESS ) {
 570                 rs->sr_err = slap_map_api2result( rs );
 571                 if ( sendok & LDAP_BACK_SENDERR ) {
 572                         if ( rs->sr_text == NULL ) {
 573                                 rs->sr_text = "ldap_initialize() failed";
 574                         }
 575                         send_ldap_result( op, rs );
 576                         rs->sr_text = NULL;
 577                 }
 578
 579         } else {
 580                 if ( li->li_conn_ttl > 0 ) {
 581                         (*lcp)->lc_create_time = op->o_time;
 582                 }
 583         }
 584
 585         return rs->sr_err;
 586 }
 587
 588 ldapconn_t *
 589 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 590 {
 591         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 592         ldapconn_t      *lc = NULL,
 593                         lc_curr = { 0 };
 594         int             refcnt = 1, binding = 1;
 595
 596         /* Internal searches are privileged and shared. So is root. */
 597         if ( op->o_do_not_cache || be_isroot( op ) ) {
 598                 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
 599                 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
 600                 lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
 601
 602         } else {
 603                 lc_curr.lc_local_ndn = op->o_ndn;
 604                 /* Explicit binds must not be shared */
 605                 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
 606                         lc_curr.lc_conn = op->o_conn;
 607
 608                 } else {
 609                         lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
 610                 }
 611         }
 612
 613         /* Explicit Bind requests always get their own conn */
 614         if ( !( sendok & LDAP_BACK_BINDING ) ) {
 615                 /* Searches for a ldapconn in the avl tree */
 616 retry_lock:
 617                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 618
 619                 lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 620                                 (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 621                 if ( lc != NULL ) {
 622                         /* Don't reuse connections while they're still binding */
 623                         if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 624                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 625                                 ldap_pvt_thread_yield();
 626                                 goto retry_lock;
 627                         }
 628                         refcnt = ++lc->lc_refcnt;
 629                         binding = ++lc->lc_binding;
 630                 }
 631                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 632         }
 633
 634         /* Looks like we didn't get a bind. Open a new session... */
 635         if ( lc == NULL ) {
 636                 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
 637                         return NULL;
 638                 }
 639                 if ( sendok & LDAP_BACK_BINDING ) {
 640                         LDAP_BACK_CONN_BINDING_SET( lc );
 641                 }
 642                 lc->lc_conn = lc_curr.lc_conn;
 643                 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
 644
 645                 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
 646                         ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
 647                         ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
 648                         LDAP_BACK_CONN_ISPRIV_SET( lc );
 649
 650                 } else {
 651                         BER_BVZERO( &lc->lc_cred );
 652                         BER_BVZERO( &lc->lc_bound_ndn );
 653 #if 0
 654                         /* FIXME: if we set lc_bound_ndn = o_ndn
 655                          * we end up with a bind with DN but no password! */
 656                         if ( !BER_BVISEMPTY( &op->o_ndn )
 657                                 && SLAP_IS_AUTHZ_BACKEND( op ) )
 658                         {
 659                                 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
 660                         }
 661 #endif
 662                 }
 663
 664 #ifdef HAVE_TLS
 665                 /* if start TLS failed but it was not mandatory,
 666                  * check if the non-TLS connection was already
 667                  * in cache; in case, destroy the newly created
 668                  * connection and use the existing one */
 669                 if ( lc->lc_conn == LDAP_BACK_PCONN_TLS
 670                                 && !ldap_tls_inplace( lc->lc_ld ) )
 671                 {
 672                         ldapconn_t *tmplc;
 673
 674                         lc_curr.lc_conn = LDAP_BACK_PCONN;
 675                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 676                         tmplc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 677                                         (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 678                         if ( tmplc != NULL ) {
 679                                 refcnt = ++tmplc->lc_refcnt;
 680                                 binding = ++tmplc->lc_binding;
 681                                 ldap_back_conn_free( lc );
 682                                 lc = tmplc;
 683                         }
 684                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 685
 686                         if ( tmplc != NULL ) {
 687                                 goto done;
 688                         }
 689                 }
 690 #endif /* HAVE_TLS */
 691
 692                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 693
 694                 /* Inserts the newly created ldapconn in the avl tree */
 695                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 696
 697                 assert( lc->lc_refcnt == 1 );
 698                 assert( lc->lc_binding == 1 );
 699                 rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 700                         ldap_back_conndn_cmp, ldap_back_conndn_dup );
 701
 702 #if PRINT_CONNTREE > 0
 703                 myprint( li->li_conninfo.lai_tree, "ldap_back_getconn" );
 704 #endif /* PRINT_CONNTREE */
 705
 706                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 707
 708                 Debug( LDAP_DEBUG_TRACE,
 709                         "=>ldap_back_getconn: conn %p inserted refcnt=%u binding=%u\n",
 710                         (void *)lc, refcnt, binding );
 711
 712                 /* Err could be -1 in case a duplicate ldapconn is inserted */
 713                 switch ( rs->sr_err ) {
 714                 case 0:
 715                         break;
 716
 717                 case -1:
 718                         if ( !( sendok & LDAP_BACK_BINDING ) ) {
 719                                 /* duplicate: free and try to get the newly created one */
 720                                 goto retry_lock;
 721                         }
 722                         /* taint connection, so that it'll be freed when released */
 723                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 724                         (void *)avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 725                                         ldap_back_conndnlc_cmp );
 726                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 727                         LDAP_BACK_CONN_TAINTED_SET( lc );
 728                         break;
 729
 730                 default:
 731                         ldap_back_conn_free( lc );
 732                         rs->sr_err = LDAP_OTHER;
 733                         rs->sr_text = "proxy bind collision";
 734                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
 735                                 send_ldap_result( op, rs );
 736                                 rs->sr_text = NULL;
 737                         }
 738                         return NULL;
 739                 }
 740
 741         } else {
 742                 char    buf[ SLAP_TEXT_BUFLEN ];
 743                 int     expiring = 0;
 744
 745                 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
 746                         || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
 747                 {
 748                         expiring = 1;
 749
 750                         /* let it be used, but taint/delete it so that
 751                          * no-one else can look it up any further */
 752                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 753                         (void *)avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 754                                         ldap_back_conndnlc_cmp );
 755                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 756                         LDAP_BACK_CONN_TAINTED_SET( lc );
 757                 }
 758
 759                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 760                         snprintf( buf, sizeof( buf ),
 761                                 "conn %p fetched refcnt=%u binding=%u%s",
 762                                 (void *)lc, refcnt, binding, expiring ? " expiring" : "" );
 763                         Debug( LDAP_DEBUG_TRACE,
 764                                 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
 765                 }
 766
 767         }
 768
 769 #ifdef HAVE_TLS
 770 done:;
 771 #endif /* HAVE_TLS */
 772         if ( li->li_idle_timeout && lc ) {
 773                 lc->lc_time = op->o_time;
 774         }
 775
 776         return lc;
 777 }
 778
 779 void
 780 ldap_back_release_conn_lock(
 781         Operation               *op,
 782         SlapReply               *rs,
 783         ldapconn_t              *lc,
 784         int                     dolock )
 785 {
 786         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 787
 788         if ( dolock ) {
 789                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 790         }
 791         assert( lc->lc_refcnt > 0 );
 792         LDAP_BACK_CONN_BINDING_CLEAR( lc );
 793         lc->lc_refcnt--;
 794         if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
 795                 ldap_back_freeconn( op, lc, 0 );
 796         }
 797         if ( dolock ) {
 798                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 799         }
 800 }
 801
 802 /*
 803  * ldap_back_dobind
 804  *
 805  * Note: as the check for the value of lc->lc_bound was already here, I removed
 806  * it from all the callers, and I made the function return the flag, so
 807  * it can be used to simplify the check.
 808  *
 809  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
 810  */
 811 static int
 812 ldap_back_dobind_int(
 813         ldapconn_t              *lc,
 814         Operation               *op,
 815         SlapReply               *rs,
 816         ldap_back_send_t        sendok,
 817         int                     retries,
 818         int                     dolock )
 819 {
 820         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 821
 822         int             rc, binding = 0;
 823         ber_int_t       msgid;
 824
 825         assert( retries >= 0 );
 826
 827 retry_lock:;
 828         if ( dolock ) {
 829                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 830         }
 831
 832         if ( binding == 0 ) {
 833                 /* check if already bound */
 834                 rc = LDAP_BACK_CONN_ISBOUND( lc );
 835                 if ( rc ) {
 836                         lc->lc_binding--;
 837                         if ( dolock ) {
 838                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 839                         }
 840                         return rc;
 841                 }
 842
 843                 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 844                         /* if someone else is about to bind it, give up and retry */
 845                         if ( dolock ) {
 846                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 847                         }
 848                         ldap_pvt_thread_yield();
 849                         goto retry_lock;
 850
 851                 } else {
 852                         /* otherwise this thread will bind it */
 853                         LDAP_BACK_CONN_BINDING_SET( lc );
 854                         binding = 1;
 855                 }
 856         }
 857
 858         /* wait for pending operations to finish */
 859         /* FIXME: may become a bottleneck! */
 860         if ( lc->lc_refcnt != lc->lc_binding ) {
 861                 if ( dolock ) {
 862                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 863                 }
 864                 ldap_pvt_thread_yield();
 865                 goto retry_lock;
 866         }
 867
 868         if ( dolock ) {
 869                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 870         }
 871
 872 #if 0
 873         while ( lc->lc_refcnt > 1 ) {
 874                 ldap_pvt_thread_yield();
 875                 rc = LDAP_BACK_CONN_ISBOUND( lc );
 876                 if ( rc ) {
 877                         return rc;
 878                 }
 879         }
 880
 881         if ( dolock ) {
 882                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 883         }
 884         LDAP_BACK_CONN_BINDING_SET( lc );
 885         if ( dolock ) {
 886                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 887         }
 888 #endif
 889
 890         /*
 891          * FIXME: we need to let clients use proxyAuthz
 892          * otherwise we cannot do symmetric pools of servers;
 893          * we have to live with the fact that a user can
 894          * authorize itself as any ID that is allowed
 895          * by the authzTo directive of the "proxyauthzdn".
 896          */
 897         /*
 898          * NOTE: current Proxy Authorization specification
 899          * and implementation do not allow proxy authorization
 900          * control to be provided with Bind requests
 901          */
 902         /*
 903          * if no bind took place yet, but the connection is bound
 904          * and the "idassert-authcDN" (or other ID) is set,
 905          * then bind as the asserting identity and explicitly
 906          * add the proxyAuthz control to every operation with the
 907          * dn bound to the connection as control value.
 908          * This is done also if this is the authrizing backend,
 909          * but the "override" flag is given to idassert.
 910          * It allows to use SASL bind and yet proxyAuthz users
 911          */
 912         if ( op->o_conn != NULL &&
 913                         !op->o_do_not_cache &&
 914                         ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
 915                           ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 916         {
 917                 (void)ldap_back_proxy_authz_bind( lc, op, rs, sendok );
 918                 goto done;
 919         }
 920
 921 #ifdef HAVE_CYRUS_SASL
 922         if ( LDAP_BACK_CONN_ISPRIV( lc )
 923                 && li->li_acl_authmethod == LDAP_AUTH_SASL )
 924         {
 925                 void            *defaults = NULL;
 926
 927                 if ( li->li_acl_secprops != NULL ) {
 928                         rc = ldap_set_option( lc->lc_ld,
 929                                 LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops);
 930
 931                         if ( rc != LDAP_OPT_SUCCESS ) {
 932                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
 933                                         "(SECPROPS,\"%s\") failed!\n",
 934                                         li->li_acl_secprops, 0, 0 );
 935                                 goto done;
 936                         }
 937                 }
 938
 939                 defaults = lutil_sasl_defaults( lc->lc_ld,
 940                                 li->li_acl_sasl_mech.bv_val,
 941                                 li->li_acl_sasl_realm.bv_val,
 942                                 li->li_acl_authcID.bv_val,
 943                                 li->li_acl_passwd.bv_val,
 944                                 NULL );
 945
 946                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
 947                                 li->li_acl_authcDN.bv_val,
 948                                 li->li_acl_sasl_mech.bv_val, NULL, NULL,
 949                                 LDAP_SASL_QUIET, lutil_sasl_interact,
 950                                 defaults );
 951
 952                 lutil_sasl_freedefs( defaults );
 953
 954                 rs->sr_err = slap_map_api2result( rs );
 955                 if ( rs->sr_err != LDAP_SUCCESS ) {
 956                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 957                         send_ldap_result( op, rs );
 958
 959                 } else {
 960                         LDAP_BACK_CONN_ISBOUND_SET( lc );
 961                 }
 962                 goto done;
 963         }
 964 #endif /* HAVE_CYRUS_SASL */
 965
 966 retry:;
 967         rs->sr_err = ldap_sasl_bind( lc->lc_ld,
 968                         lc->lc_bound_ndn.bv_val,
 969                         LDAP_SASL_SIMPLE, &lc->lc_cred,
 970                         NULL, NULL, &msgid );
 971
 972         if ( rs->sr_err == LDAP_SERVER_DOWN ) {
 973                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 974                         if ( dolock ) {
 975                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 976                         }
 977
 978                         assert( lc->lc_refcnt > 0 );
 979                         if ( lc->lc_refcnt == 1 ) {
 980                                 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
 981                                 lc->lc_ld = NULL;
 982
 983                                 /* lc here must be the regular lc, reset and ready for init */
 984                                 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
 985                                 if ( rs->sr_err != LDAP_SUCCESS ) {
 986                                         lc->lc_binding--;
 987                                         lc->lc_refcnt = 0;
 988                                 }
 989                         }
 990
 991                         if ( dolock ) {
 992                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 993                         }
 994
 995                         if ( rs->sr_err == LDAP_SUCCESS ) {
 996                                 if ( retries > 0 ) {
 997                                         retries--;
 998                                 }
 999                                 goto retry;
1000                         }
1001
1002                 } else {
1003                         if ( dolock ) {
1004                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1005                         }
1006                         lc->lc_binding--;
1007                         if ( dolock ) {
1008                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1009                         }
1010                 }
1011
1012                 lc->lc_binding--;
1013                 ldap_back_freeconn( op, lc, dolock );
1014                 rs->sr_err = slap_map_api2result( rs );
1015
1016                 return 0;
1017         }
1018
1019         rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
1020         if ( rc == LDAP_SUCCESS ) {
1021                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1022         }
1023
1024 done:;
1025         lc->lc_binding--;
1026         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1027         rc = LDAP_BACK_CONN_ISBOUND( lc );
1028         if ( !rc ) {
1029                 ldap_back_release_conn_lock( op, rs, lc, dolock );
1030         }
1031
1032         return rc;
1033 }
1034
1035 int
1036 ldap_back_dobind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1037 {
1038         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1039
1040         return ldap_back_dobind_int( lc, op, rs, sendok, li->li_nretries, 1 );
1041 }
1042
1043 /*
1044  * ldap_back_default_rebind
1045  *
1046  * This is a callback used for chasing referrals using the same
1047  * credentials as the original user on this session.
1048  */
1049 int
1050 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
1051         ber_int_t msgid, void *params )
1052 {
1053         ldapconn_t      *lc = (ldapconn_t *)params;
1054
1055 #ifdef HAVE_TLS
1056         /* ... otherwise we couldn't get here */
1057         assert( lc != NULL );
1058
1059         if ( !ldap_tls_inplace( ld ) ) {
1060                 int             is_tls = LDAP_BACK_CONN_ISTLS( lc ),
1061                                 rc;
1062                 const char      *text = NULL;
1063
1064                 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
1065                         LDAP_BACK_RETRY_DEFAULT, &text );
1066                 if ( rc != LDAP_SUCCESS ) {
1067                         return rc;
1068                 }
1069         }
1070 #endif /* HAVE_TLS */
1071
1072         /* FIXME: add checks on the URL/identity? */
1073
1074         return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
1075                         LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
1076 }
1077
1078 /*
1079  * ldap_back_default_urllist
1080  */
1081 int
1082 ldap_back_default_urllist(
1083         LDAP            *ld,
1084         LDAPURLDesc     **urllist,
1085         LDAPURLDesc     **url,
1086         void            *params )
1087 {
1088         ldapinfo_t      *li = (ldapinfo_t *)params;
1089         LDAPURLDesc     **urltail;
1090
1091         if ( urllist == url ) {
1092                 return LDAP_SUCCESS;
1093         }
1094
1095         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
1096                 /* count */ ;
1097
1098         *urltail = *urllist;
1099         *urllist = *url;
1100         *url = NULL;
1101
1102         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1103         if ( li->li_uri ) {
1104                 ch_free( li->li_uri );
1105         }
1106
1107         ldap_get_option( ld, LDAP_OPT_URI, (void *)&li->li_uri );
1108         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1109
1110         return LDAP_SUCCESS;
1111 }
1112
1113 int
1114 ldap_back_op_result(
1115                 ldapconn_t              *lc,
1116                 Operation               *op,
1117                 SlapReply               *rs,
1118                 ber_int_t               msgid,
1119                 time_t                  timeout,
1120                 ldap_back_send_t        sendok )
1121 {
1122         char            *match = NULL;
1123         LDAPMessage     *res = NULL;
1124         char            *text = NULL;
1125
1126 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
1127
1128         rs->sr_text = NULL;
1129         rs->sr_matched = NULL;
1130
1131         /* if the error recorded in the reply corresponds
1132          * to a successful state, get the error from the
1133          * remote server response */
1134         if ( ERR_OK( rs->sr_err ) ) {
1135                 int             rc;
1136                 struct timeval  tv;
1137
1138                 if ( timeout ) {
1139                         tv.tv_sec = timeout;
1140                         tv.tv_usec = 0;
1141
1142                 } else {
1143                         LDAP_BACK_TV_SET( &tv );
1144                 }
1145
1146 retry:;
1147                 /* if result parsing fails, note the failure reason */
1148                 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1149                 switch ( rc ) {
1150                 case 0:
1151                         if ( timeout ) {
1152                                 (void)ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
1153                                 rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
1154                                         LDAP_ADMINLIMIT_EXCEEDED : LDAP_OPERATIONS_ERROR;
1155                                 rs->sr_text = "Operation timed out";
1156                                 break;
1157                         }
1158
1159                         LDAP_BACK_TV_SET( &tv );
1160                         ldap_pvt_thread_yield();
1161                         goto retry;
1162
1163                 case -1:
1164                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
1165                                         &rs->sr_err );
1166                         break;
1167
1168
1169                 /* otherwise get the result; if it is not
1170                  * LDAP_SUCCESS, record it in the reply
1171                  * structure (this includes
1172                  * LDAP_COMPARE_{TRUE|FALSE}) */
1173                 default:
1174                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
1175                                         &match, &text, NULL, NULL, 1 );
1176                         rs->sr_text = text;
1177                         if ( rc != LDAP_SUCCESS ) {
1178                                 rs->sr_err = rc;
1179                         }
1180                 }
1181         }
1182
1183         /* if the error in the reply structure is not
1184          * LDAP_SUCCESS, try to map it from client
1185          * to server error */
1186         if ( !ERR_OK( rs->sr_err ) ) {
1187                 rs->sr_err = slap_map_api2result( rs );
1188
1189                 /* internal ops ( op->o_conn == NULL )
1190                  * must not reply to client */
1191                 if ( op->o_conn && !op->o_do_not_cache && match ) {
1192
1193                         /* record the (massaged) matched
1194                          * DN into the reply structure */
1195                         rs->sr_matched = match;
1196                 }
1197         }
1198         if ( op->o_conn &&
1199                         ( ( sendok & LDAP_BACK_SENDOK )
1200                           || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1201         {
1202                 send_ldap_result( op, rs );
1203         }
1204         if ( match ) {
1205                 if ( rs->sr_matched != match ) {
1206                         free( (char *)rs->sr_matched );
1207                 }
1208                 rs->sr_matched = NULL;
1209                 ldap_memfree( match );
1210         }
1211         if ( text ) {
1212                 ldap_memfree( text );
1213         }
1214         rs->sr_text = NULL;
1215         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1216 }
1217
1218 /* return true if bound, false if failed */
1219 int
1220 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1221 {
1222         int             rc = 0;
1223         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1224
1225         assert( lcp != NULL );
1226         assert( *lcp != NULL );
1227
1228         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1229
1230         if ( (*lcp)->lc_refcnt == 1 ) {
1231                 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1232                 Debug( LDAP_DEBUG_ANY,
1233                         "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
1234                         op->o_log_prefix, li->li_uri,
1235                         BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
1236                                 "" : (*lcp)->lc_bound_ndn.bv_val );
1237                 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1238
1239                 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
1240                 (*lcp)->lc_ld = NULL;
1241                 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
1242
1243                 /* lc here must be the regular lc, reset and ready for init */
1244                 rc = ldap_back_prepare_conn( lcp, op, rs, sendok );
1245                 if ( rc != LDAP_SUCCESS ) {
1246                         rc = 0;
1247                         *lcp = NULL;
1248
1249                 } else {
1250                         rc = ldap_back_dobind_int( *lcp, op, rs, sendok, 0, 0 );
1251                         if ( rc == 0 ) {
1252                                 *lcp = NULL;
1253                         }
1254                 }
1255
1256         } else {
1257                 Debug( LDAP_DEBUG_TRACE,
1258                         "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
1259                         (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
1260
1261                 ldap_back_release_conn_lock( op, rs, *lcp, 0 );
1262                 *lcp = NULL;
1263
1264                 if ( sendok ) {
1265                         rs->sr_err = LDAP_UNAVAILABLE;
1266                         rs->sr_text = "unable to retry";
1267                         send_ldap_result( op, rs );
1268                 }
1269         }
1270
1271         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1272
1273         return rc;
1274 }
1275
1276 static int
1277 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1278 {
1279         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1280         struct berval   binddn = slap_empty_bv;
1281         struct berval   bindcred = slap_empty_bv;
1282         struct berval   ndn;
1283         int             dobind = 0;
1284         int             msgid;
1285         int             rc;
1286
1287         /* don't proxyAuthz if protocol is not LDAPv3 */
1288         switch ( li->li_version ) {
1289         case LDAP_VERSION3:
1290                 break;
1291
1292         case 0:
1293                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1294                         break;
1295                 }
1296                 /* fall thru */
1297
1298         default:
1299                 goto done;
1300         }
1301
1302         if ( op->o_tag == LDAP_REQ_BIND ) {
1303                 ndn = op->o_req_ndn;
1304
1305         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1306                 ndn = op->o_conn->c_ndn;
1307
1308         } else {
1309                 ndn = op->o_ndn;
1310         }
1311
1312         /*
1313          * FIXME: we need to let clients use proxyAuthz
1314          * otherwise we cannot do symmetric pools of servers;
1315          * we have to live with the fact that a user can
1316          * authorize itself as any ID that is allowed
1317          * by the authzTo directive of the "proxyauthzdn".
1318          */
1319         /*
1320          * NOTE: current Proxy Authorization specification
1321          * and implementation do not allow proxy authorization
1322          * control to be provided with Bind requests
1323          */
1324         /*
1325          * if no bind took place yet, but the connection is bound
1326          * and the "proxyauthzdn" is set, then bind as
1327          * "proxyauthzdn" and explicitly add the proxyAuthz
1328          * control to every operation with the dn bound
1329          * to the connection as control value.
1330          */
1331
1332         /* bind as proxyauthzdn only if no idassert mode
1333          * is requested, or if the client's identity
1334          * is authorized */
1335         switch ( li->li_idassert_mode ) {
1336         case LDAP_BACK_IDASSERT_LEGACY:
1337                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1338                         if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
1339                         {
1340                                 binddn = li->li_idassert_authcDN;
1341                                 bindcred = li->li_idassert_passwd;
1342                                 dobind = 1;
1343                         }
1344                 }
1345                 break;
1346
1347         default:
1348                 /* NOTE: rootdn can always idassert */
1349                 if ( BER_BVISNULL( &ndn ) && li->li_idassert_authz == NULL ) {
1350                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1351                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1352                                 if ( sendok & LDAP_BACK_SENDERR ) {
1353                                         send_ldap_result( op, rs );
1354                                 }
1355                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1356
1357                         } else {
1358                                 rs->sr_err = LDAP_SUCCESS;
1359                                 binddn = slap_empty_bv;
1360                                 bindcred = slap_empty_bv;
1361                                 break;
1362                         }
1363
1364                         goto done;
1365
1366                 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1367                         struct berval authcDN;
1368
1369                         if ( BER_BVISNULL( &ndn ) ) {
1370                                 authcDN = slap_empty_bv;
1371
1372                         } else {
1373                                 authcDN = ndn;
1374                         }
1375                         rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
1376                                         &authcDN, &authcDN );
1377                         if ( rs->sr_err != LDAP_SUCCESS ) {
1378                                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1379                                         if ( sendok & LDAP_BACK_SENDERR ) {
1380                                                 send_ldap_result( op, rs );
1381                                         }
1382                                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1383
1384                                 } else {
1385                                         rs->sr_err = LDAP_SUCCESS;
1386                                         binddn = slap_empty_bv;
1387                                         bindcred = slap_empty_bv;
1388                                         break;
1389                                 }
1390
1391                                 goto done;
1392                         }
1393                 }
1394
1395                 binddn = li->li_idassert_authcDN;
1396                 bindcred = li->li_idassert_passwd;
1397                 dobind = 1;
1398                 break;
1399         }
1400
1401         if ( dobind && li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1402 #ifdef HAVE_CYRUS_SASL
1403                 void            *defaults = NULL;
1404                 struct berval   authzID = BER_BVNULL;
1405                 int             freeauthz = 0;
1406
1407                 /* if SASL supports native authz, prepare for it */
1408                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1409                                 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1410                 {
1411                         switch ( li->li_idassert_mode ) {
1412                         case LDAP_BACK_IDASSERT_OTHERID:
1413                         case LDAP_BACK_IDASSERT_OTHERDN:
1414                                 authzID = li->li_idassert_authzID;
1415                                 break;
1416
1417                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1418                                 BER_BVSTR( &authzID, "dn:" );
1419                                 break;
1420
1421                         case LDAP_BACK_IDASSERT_SELF:
1422                                 if ( BER_BVISNULL( &ndn ) ) {
1423                                         /* connection is not authc'd, so don't idassert */
1424                                         BER_BVSTR( &authzID, "dn:" );
1425                                         break;
1426                                 }
1427                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1428                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1429                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1430                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1431                                                 ndn.bv_val, ndn.bv_len + 1 );
1432                                 freeauthz = 1;
1433                                 break;
1434
1435                         default:
1436                                 break;
1437                         }
1438                 }
1439
1440                 if ( li->li_idassert_secprops != NULL ) {
1441                         rs->sr_err = ldap_set_option( lc->lc_ld,
1442                                 LDAP_OPT_X_SASL_SECPROPS,
1443                                 (void *)li->li_idassert_secprops );
1444
1445                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1446                                 rs->sr_err = LDAP_OTHER;
1447                                 if ( sendok & LDAP_BACK_SENDERR ) {
1448                                         send_ldap_result( op, rs );
1449                                 }
1450                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1451                                 goto done;
1452                         }
1453                 }
1454
1455                 defaults = lutil_sasl_defaults( lc->lc_ld,
1456                                 li->li_idassert_sasl_mech.bv_val,
1457                                 li->li_idassert_sasl_realm.bv_val,
1458                                 li->li_idassert_authcID.bv_val,
1459                                 li->li_idassert_passwd.bv_val,
1460                                 authzID.bv_val );
1461
1462                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1463                                 li->li_idassert_sasl_mech.bv_val, NULL, NULL,
1464                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1465                                 defaults );
1466
1467                 rs->sr_err = slap_map_api2result( rs );
1468                 if ( rs->sr_err != LDAP_SUCCESS ) {
1469                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1470                         if ( sendok & LDAP_BACK_SENDERR ) {
1471                                 send_ldap_result( op, rs );
1472                         }
1473
1474                 } else {
1475                         LDAP_BACK_CONN_ISBOUND_SET( lc );
1476                 }
1477
1478                 lutil_sasl_freedefs( defaults );
1479                 if ( freeauthz ) {
1480                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1481                 }
1482
1483                 goto done;
1484 #endif /* HAVE_CYRUS_SASL */
1485         }
1486
1487         switch ( li->li_idassert_authmethod ) {
1488         case LDAP_AUTH_NONE:
1489                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1490                 goto done;
1491
1492         case LDAP_AUTH_SIMPLE:
1493                 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1494                                 binddn.bv_val, LDAP_SASL_SIMPLE,
1495                                 &bindcred, NULL, NULL, &msgid );
1496                 break;
1497
1498         default:
1499                 /* unsupported! */
1500                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1501                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1502                 if ( sendok & LDAP_BACK_SENDERR ) {
1503                         send_ldap_result( op, rs );
1504                 }
1505                 goto done;
1506         }
1507
1508         rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
1509         if ( rc == LDAP_SUCCESS ) {
1510                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1511         }
1512 done:;
1513         return LDAP_BACK_CONN_ISBOUND( lc );
1514 }
1515
1516 /*
1517  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1518  * to existing server-side controls if required; if not,
1519  * the existing server-side controls are placed in *pctrls.
1520  * The caller, after using the controls in client API
1521  * operations, if ( *pctrls != op->o_ctrls ), should
1522  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1523  * The function returns success if the control could
1524  * be added if required, or if it did nothing; in the future,
1525  * it might return some error if it failed.
1526  *
1527  * if no bind took place yet, but the connection is bound
1528  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1529  * and explicitly add proxyAuthz the control to every operation
1530  * with the dn bound to the connection as control value.
1531  *
1532  * If no server-side controls are defined for the operation,
1533  * simply add the proxyAuthz control; otherwise, if the
1534  * proxyAuthz control is not already set, add it as
1535  * the first one
1536  *
1537  * FIXME: is controls order significant for security?
1538  * ANSWER: controls ordering and interoperability
1539  * must be indicated by the specs of each control; if none
1540  * is specified, the order is irrelevant.
1541  */
1542 int
1543 ldap_back_proxy_authz_ctrl(
1544                 ldapconn_t      *lc,
1545                 Operation       *op,
1546                 SlapReply       *rs,
1547                 LDAPControl     ***pctrls )
1548 {
1549         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
1550         LDAPControl     **ctrls = NULL;
1551         int             i = 0,
1552                         mode;
1553         struct berval   assertedID,
1554                         ndn;
1555
1556         *pctrls = NULL;
1557
1558         rs->sr_err = LDAP_SUCCESS;
1559
1560         /* don't proxyAuthz if protocol is not LDAPv3 */
1561         switch ( li->li_version ) {
1562         case LDAP_VERSION3:
1563                 break;
1564
1565         case 0:
1566                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1567                         break;
1568                 }
1569                 /* fall thru */
1570
1571         default:
1572                 goto done;
1573         }
1574
1575         /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1576          * but if it is not set this test fails.  We need a different
1577          * means to detect if idassert is enabled */
1578         if ( ( BER_BVISNULL( &li->li_idassert_authcID ) || BER_BVISEMPTY( &li->li_idassert_authcID ) )
1579                         && ( BER_BVISNULL( &li->li_idassert_authcDN ) || BER_BVISEMPTY( &li->li_idassert_authcDN ) ) )
1580         {
1581                 goto done;
1582         }
1583
1584         if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1585                 goto done;
1586         }
1587
1588         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1589                 ndn = op->o_conn->c_ndn;
1590
1591         } else {
1592                 ndn = op->o_ndn;
1593         }
1594
1595         if ( li->li_idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1596                 if ( op->o_proxy_authz ) {
1597                         /*
1598                          * FIXME: we do not want to perform proxyAuthz
1599                          * on behalf of the client, because this would
1600                          * be performed with "proxyauthzdn" privileges.
1601                          *
1602                          * This might actually be too strict, since
1603                          * the "proxyauthzdn" authzTo, and each entry's
1604                          * authzFrom attributes may be crafted
1605                          * to avoid unwanted proxyAuthz to take place.
1606                          */
1607 #if 0
1608                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1609                         rs->sr_text = "proxyAuthz not allowed within namingContext";
1610 #endif
1611                         goto done;
1612                 }
1613
1614                 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1615                         goto done;
1616                 }
1617
1618                 if ( BER_BVISNULL( &ndn ) ) {
1619                         goto done;
1620                 }
1621
1622                 if ( BER_BVISNULL( &li->li_idassert_authcDN ) ) {
1623                         goto done;
1624                 }
1625
1626         } else if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1627                 if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1628                                 /* && ( !BER_BVISNULL( &ndn )
1629                                         || LDAP_BACK_CONN_ISBOUND( lc ) ) */ )
1630                 {
1631                         /* already asserted in SASL via native authz */
1632                         /* NOTE: the test on lc->lc_bound is used to trap
1633                          * native authorization of anonymous users,
1634                          * since in that case ndn is NULL */
1635                         goto done;
1636                 }
1637
1638         } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1639                 int             rc;
1640                 struct berval authcDN;
1641
1642                 if ( BER_BVISNULL( &ndn ) ) {
1643                         authcDN = slap_empty_bv;
1644                 } else {
1645                         authcDN = ndn;
1646                 }
1647                 rc = slap_sasl_matches( op, li->li_idassert_authz,
1648                                 &authcDN, & authcDN );
1649                 if ( rc != LDAP_SUCCESS ) {
1650                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1651                         {
1652                                 /* ndn is not authorized
1653                                  * to use idassert */
1654                                 rs->sr_err = rc;
1655                         }
1656                         goto done;
1657                 }
1658         }
1659
1660         if ( op->o_proxy_authz ) {
1661                 /*
1662                  * FIXME: we can:
1663                  * 1) ignore the already set proxyAuthz control
1664                  * 2) leave it in place, and don't set ours
1665                  * 3) add both
1666                  * 4) reject the operation
1667                  *
1668                  * option (4) is very drastic
1669                  * option (3) will make the remote server reject
1670                  * the operation, thus being equivalent to (4)
1671                  * option (2) will likely break the idassert
1672                  * assumptions, so we cannot accept it;
1673                  * option (1) means that we are contradicting
1674                  * the client's reques.
1675                  *
1676                  * I think (4) is the only correct choice.
1677                  */
1678                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1679                 rs->sr_text = "proxyAuthz not allowed within namingContext";
1680         }
1681
1682         if ( op->o_is_auth_check ) {
1683                 mode = LDAP_BACK_IDASSERT_NOASSERT;
1684
1685         } else {
1686                 mode = li->li_idassert_mode;
1687         }
1688
1689         switch ( mode ) {
1690         case LDAP_BACK_IDASSERT_SELF:
1691                 if ( BER_BVISNULL( &ndn ) ) {
1692                         goto done;
1693                 }
1694                 assertedID = ndn;
1695                 break;
1696
1697         case LDAP_BACK_IDASSERT_LEGACY:
1698                 /* original behavior:
1699                  * assert the client's identity */
1700                 if ( BER_BVISNULL( &ndn ) ) {
1701                         assertedID = slap_empty_bv;
1702                 } else {
1703                         assertedID = ndn;
1704                 }
1705                 break;
1706
1707         case LDAP_BACK_IDASSERT_ANONYMOUS:
1708                 /* assert "anonymous" */
1709                 assertedID = slap_empty_bv;
1710                 break;
1711
1712         case LDAP_BACK_IDASSERT_NOASSERT:
1713                 /* don't assert; bind as proxyauthzdn */
1714                 goto done;
1715
1716         case LDAP_BACK_IDASSERT_OTHERID:
1717         case LDAP_BACK_IDASSERT_OTHERDN:
1718                 /* assert idassert DN */
1719                 assertedID = li->li_idassert_authzID;
1720                 break;
1721
1722         default:
1723                 assert( 0 );
1724         }
1725
1726         if ( BER_BVISNULL( &assertedID ) ) {
1727                 assertedID = slap_empty_bv;
1728         }
1729
1730         /* don't idassert the bound DN (ITS#4497) */
1731         if ( dn_match( &assertedID, &lc->lc_bound_ndn ) ) {
1732                 goto done;
1733         }
1734
1735         if ( op->o_ctrls ) {
1736                 for ( i = 0; op->o_ctrls[ i ]; i++ )
1737                         /* just count ctrls */ ;
1738         }
1739
1740         ctrls = op->o_tmpalloc( sizeof( LDAPControl * ) * (i + 2) + sizeof( LDAPControl ),
1741                         op->o_tmpmemctx );
1742         ctrls[ 0 ] = (LDAPControl *)&ctrls[ i + 2 ];
1743
1744         ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1745         ctrls[ 0 ]->ldctl_iscritical = 1;
1746
1747         switch ( li->li_idassert_mode ) {
1748         /* already in u:ID or dn:DN form */
1749         case LDAP_BACK_IDASSERT_OTHERID:
1750         case LDAP_BACK_IDASSERT_OTHERDN:
1751                 ber_dupbv_x( &ctrls[ 0 ]->ldctl_value, &assertedID, op->o_tmpmemctx );
1752                 break;
1753
1754         /* needs the dn: prefix */
1755         default:
1756                 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1757                 ctrls[ 0 ]->ldctl_value.bv_val = op->o_tmpalloc( ctrls[ 0 ]->ldctl_value.bv_len + 1,
1758                                 op->o_tmpmemctx );
1759                 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1760                 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1761                                 assertedID.bv_val, assertedID.bv_len + 1 );
1762                 break;
1763         }
1764
1765         /* Older versions of <draft-weltman-ldapv3-proxy> required
1766          * to encode the value of the authzID (and called it proxyDN);
1767          * this hack provides compatibility with those DSAs that
1768          * implement it this way */
1769         if ( li->li_idassert_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
1770                 struct berval           authzID = ctrls[ 0 ]->ldctl_value;
1771                 BerElementBuffer        berbuf;
1772                 BerElement              *ber = (BerElement *)&berbuf;
1773                 ber_tag_t               tag;
1774
1775                 ber_init2( ber, 0, LBER_USE_DER );
1776                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
1777
1778                 tag = ber_printf( ber, "O", &authzID );
1779                 if ( tag == LBER_ERROR ) {
1780                         rs->sr_err = LDAP_OTHER;
1781                         goto free_ber;
1782                 }
1783
1784                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
1785                         rs->sr_err = LDAP_OTHER;
1786                         goto free_ber;
1787                 }
1788
1789 free_ber:;
1790                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
1791                 ber_free_buf( ber );
1792
1793                 if ( rs->sr_err != LDAP_SUCCESS ) {
1794                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
1795                         ctrls = NULL;
1796                         goto done;
1797                 }
1798
1799         } else if ( li->li_idassert_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
1800                 struct berval           authzID = ctrls[ 0 ]->ldctl_value,
1801                                         tmp;
1802                 BerElementBuffer        berbuf;
1803                 BerElement              *ber = (BerElement *)&berbuf;
1804                 ber_tag_t               tag;
1805
1806                 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
1807                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
1808                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
1809                         ctrls = NULL;
1810                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1811                         goto done;
1812                 }
1813
1814                 tmp = authzID;
1815                 tmp.bv_val += STRLENOF( "dn:" );
1816                 tmp.bv_len -= STRLENOF( "dn:" );
1817
1818                 ber_init2( ber, 0, LBER_USE_DER );
1819                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
1820
1821                 /* apparently, Mozilla API encodes this
1822                  * as "SEQUENCE { LDAPDN }" */
1823                 tag = ber_printf( ber, "{O}", &tmp );
1824                 if ( tag == LBER_ERROR ) {
1825                         rs->sr_err = LDAP_OTHER;
1826                         goto free_ber2;
1827                 }
1828
1829                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
1830                         rs->sr_err = LDAP_OTHER;
1831                         goto free_ber2;
1832                 }
1833
1834 free_ber2:;
1835                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
1836                 ber_free_buf( ber );
1837
1838                 if ( rs->sr_err != LDAP_SUCCESS ) {
1839                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
1840                         ctrls = NULL;
1841                         goto done;
1842                 }
1843
1844                 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
1845         }
1846
1847         if ( op->o_ctrls ) {
1848                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1849                         ctrls[ i + 1 ] = op->o_ctrls[ i ];
1850                 }
1851         }
1852         ctrls[ i + 1 ] = NULL;
1853
1854 done:;
1855         if ( ctrls == NULL ) {
1856                 ctrls = op->o_ctrls;
1857         }
1858
1859         *pctrls = ctrls;
1860
1861         return rs->sr_err;
1862 }
1863
1864 int
1865 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1866 {
1867         LDAPControl     **ctrls = *pctrls;
1868
1869         /* we assume that the first control is the proxyAuthz
1870          * added by back-ldap, so it's the only one we explicitly
1871          * free */
1872         if ( ctrls && ctrls != op->o_ctrls ) {
1873                 assert( ctrls[ 0 ] != NULL );
1874
1875                 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1876                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
1877                 }
1878
1879                 op->o_tmpfree( ctrls, op->o_tmpmemctx );
1880         }
1881
1882         *pctrls = NULL;
1883
1884         return 0;
1885 }