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,
  64                 lc->lc_local_ndn.bv_val ? lc->lc_local_ndn.bv_val : "",
  65                 (void *)lc->lc_conn,
  66                 avl_bf2str( root->avl_bf ), lc->lc_refcnt );
  67
  68         ravl_print( root->avl_left, depth+1 );
  69 }
  70
  71 static void
  72 myprint( Avlnode *root, char *msg )
  73 {
  74         fprintf( stderr, "========> %s\n", msg );
  75
  76         if ( root == 0 ) {
  77                 fprintf( stderr, "\tNULL\n" );
  78
  79         } else {
  80                 ravl_print( root, 0 );
  81         }
  82
  83         fprintf( stderr, "<======== %s\n", msg );
  84 }
  85 #endif /* PRINT_CONNTREE */
  86
  87 static int
  88 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
  89
  90 static int
  91 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok );
  92
  93 static int
  94 ldap_back_conndnlc_cmp( const void *c1, const void *c2 );
  95
  96 int
  97 ldap_back_bind( Operation *op, SlapReply *rs )
  98 {
  99         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 100         ldapconn_t      *lc;
 101
 102         int rc = 0;
 103         ber_int_t msgid;
 104
 105         lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR );
 106         if ( !lc ) {
 107                 return rs->sr_err;
 108         }
 109
 110         if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
 111                 ch_free( lc->lc_bound_ndn.bv_val );
 112                 BER_BVZERO( &lc->lc_bound_ndn );
 113         }
 114         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 115
 116         /* method is always LDAP_AUTH_SIMPLE if we got here */
 117         rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
 118                         LDAP_SASL_SIMPLE,
 119                         &op->orb_cred, op->o_ctrls, NULL, &msgid );
 120         rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_SENDERR );
 121
 122         if ( rc == LDAP_SUCCESS ) {
 123                 /* If defined, proxyAuthz will be used also when
 124                  * back-ldap is the authorizing backend; for this
 125                  * purpose, a successful bind is followed by a
 126                  * bind with the configured identity assertion */
 127                 /* NOTE: use with care */
 128                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 129                         ldap_back_proxy_authz_bind( lc, op, rs, LDAP_BACK_SENDERR );
 130                         if ( !LDAP_BACK_CONN_ISBOUND( lc ) ) {
 131                                 rc = 1;
 132                                 goto done;
 133                         }
 134                 }
 135
 136                 LDAP_BACK_CONN_ISBOUND_SET( lc );
 137                 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
 138
 139                 if ( LDAP_BACK_SAVECRED( li ) ) {
 140                         if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 141                                 memset( lc->lc_cred.bv_val, 0,
 142                                                 lc->lc_cred.bv_len );
 143                         }
 144                         ber_bvreplace( &lc->lc_cred, &op->orb_cred );
 145                         ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
 146                 }
 147         }
 148 done:;
 149
 150         assert( lc->lc_binding == 1 );
 151         lc->lc_binding = 0;
 152
 153         /* must re-insert if local DN changed as result of bind */
 154         if ( !LDAP_BACK_CONN_ISBOUND( lc )
 155                 || ( LDAP_BACK_CONN_ISBOUND( lc )
 156                         && !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) ) )
 157         {
 158                 int             lerr = -1;
 159                 ldapconn_t      *tmplc;
 160
 161                 /* wait for all other ops to release the connection */
 162 retry_lock:;
 163                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 164                 if ( lc->lc_refcnt > 1 ) {
 165                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 166                         ldap_pvt_thread_yield();
 167                         goto retry_lock;
 168                 }
 169
 170                 assert( lc->lc_refcnt == 1 );
 171                 tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 172                                 ldap_back_conndnlc_cmp );
 173                 assert( tmplc == NULL || lc == tmplc );
 174
 175                 /* delete all cached connections with the current connection */
 176                 if ( LDAP_BACK_SINGLECONN( li ) ) {
 177                         while ( ( tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, ldap_back_conn_cmp ) ) != NULL )
 178                         {
 179                                 Debug( LDAP_DEBUG_TRACE,
 180                                         "=>ldap_back_bind: destroying conn %ld (refcnt=%u)\n",
 181                                         LDAP_BACK_PCONN_ID( lc->lc_conn ), lc->lc_refcnt, 0 );
 182
 183                                 if ( lc->lc_refcnt != 0 ) {
 184                                         /* taint it */
 185                                         LDAP_BACK_CONN_TAINTED_SET( tmplc );
 186
 187                                 } else {
 188                                         /*
 189                                          * Needs a test because the handler may be corrupted,
 190                                          * and calling ldap_unbind on a corrupted header results
 191                                          * in a segmentation fault
 192                                          */
 193                                         ldap_back_conn_free( tmplc );
 194                                 }
 195                         }
 196                 }
 197
 198                 if ( LDAP_BACK_CONN_ISBOUND( lc ) ) {
 199                         ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
 200                         if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 201                                 lc->lc_conn = LDAP_BACK_PCONN_SET( op );
 202                         }
 203                         lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 204                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 205                 }
 206
 207 #if PRINT_CONNTREE > 0
 208                 myprint( li->li_conninfo.lai_tree, "ldap_back_bind" );
 209 #endif /* PRINT_CONNTREE */
 210
 211                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 212                 switch ( lerr ) {
 213                 case 0:
 214                         break;
 215
 216                 case -1:
 217                         /* duplicate; someone else successfully bound
 218                          * on the same connection with the same identity;
 219                          * we can do this because lc_refcnt == 1 */
 220                         ldap_back_conn_free( lc );
 221                         lc = NULL;
 222                 }
 223         }
 224
 225         if ( lc != NULL ) {
 226                 ldap_back_release_conn( op, rs, lc );
 227         }
 228
 229         return( rc );
 230 }
 231
 232 /*
 233  * ldap_back_conndn_cmp
 234  *
 235  * compares two ldapconn_t based on the value of the conn pointer
 236  * and of the local DN; used by avl stuff for insert, lookup
 237  * and direct delete
 238  */
 239 int
 240 ldap_back_conndn_cmp( const void *c1, const void *c2 )
 241 {
 242         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 243         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 244         int rc;
 245
 246         /* If local DNs don't match, it is definitely not a match */
 247         /* For shared sessions, conn is NULL. Only explicitly
 248          * bound sessions will have non-NULL conn.
 249          */
 250         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 251         if ( rc == 0 ) {
 252                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 253         }
 254
 255         return rc;
 256 }
 257
 258 /*
 259  * ldap_back_conndnlc_cmp
 260  *
 261  * compares two ldapconn_t based on the value of the conn pointer,
 262  * the local DN and the lc pointer; used by avl stuff for insert, lookup
 263  * and direct delete
 264  */
 265 static int
 266 ldap_back_conndnlc_cmp( const void *c1, const void *c2 )
 267 {
 268         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 269         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 270         int rc;
 271
 272         /* If local DNs don't match, it is definitely not a match */
 273         /* For shared sessions, conn is NULL. Only explicitly
 274          * bound sessions will have non-NULL conn.
 275          */
 276         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 277         if ( rc == 0 ) {
 278                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 279                 if ( rc == 0 ) {
 280                         rc = SLAP_PTRCMP( lc1, lc2 );
 281                 }
 282         }
 283
 284         return rc;
 285 }
 286
 287 /*
 288  * ldap_back_conn_cmp
 289  *
 290  * compares two ldapconn_t based on the value of the conn pointer;
 291  * used by avl stuff for delete of all conns with the same connid
 292  */
 293 int
 294 ldap_back_conn_cmp( const void *c1, const void *c2 )
 295 {
 296         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 297         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 298
 299         /* For shared sessions, conn is NULL. Only explicitly
 300          * bound sessions will have non-NULL conn.
 301          */
 302         return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 303 }
 304
 305 /*
 306  * ldap_back_conndn_dup
 307  *
 308  * returns -1 in case a duplicate ldapconn_t has been inserted;
 309  * used by avl stuff
 310  */
 311 int
 312 ldap_back_conndn_dup( void *c1, void *c2 )
 313 {
 314         ldapconn_t      *lc1 = (ldapconn_t *)c1;
 315         ldapconn_t      *lc2 = (ldapconn_t *)c2;
 316
 317         /* Cannot have more than one shared session with same DN */
 318         if ( lc1->lc_conn == lc2->lc_conn &&
 319                 dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) )
 320         {
 321                 return -1;
 322         }
 323
 324         return 0;
 325 }
 326
 327 int
 328 ldap_back_freeconn( Operation *op, ldapconn_t *lc, int dolock )
 329 {
 330         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 331         ldapconn_t      *tmplc;
 332
 333         if ( dolock ) {
 334                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 335         }
 336
 337         tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 338                         ldap_back_conndnlc_cmp );
 339         assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc );
 340         if ( lc->lc_refcnt == 0 ) {
 341                 ldap_back_conn_free( (void *)lc );
 342         }
 343
 344         if ( dolock ) {
 345                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 346         }
 347
 348         return 0;
 349 }
 350
 351 #ifdef HAVE_TLS
 352 static int
 353 ldap_back_start_tls(
 354         LDAP            *ld,
 355         int             protocol,
 356         int             *is_tls,
 357         const char      *url,
 358         unsigned        flags,
 359         int             retries,
 360         const char      **text )
 361 {
 362         int             rc = LDAP_SUCCESS;
 363         ldapinfo_t      dummy;
 364
 365         /* this is ridiculous... */
 366         dummy.li_flags = flags;
 367
 368         /* start TLS ("tls-[try-]{start,propagate}" statements) */
 369         if ( ( LDAP_BACK_USE_TLS( &dummy ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS( &dummy ) ) )
 370                                 && !ldap_is_ldaps_url( url ) )
 371         {
 372 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
 373                 /*
 374                  * use asynchronous StartTLS
 375                  * in case, chase referral (not implemented yet)
 376                  */
 377                 int             msgid;
 378
 379                 if ( protocol == 0 ) {
 380                         ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
 381                                         (void *)&protocol );
 382                 }
 383
 384                 if ( protocol < LDAP_VERSION3 ) {
 385                         /* we should rather bail out... */
 386                         rc = LDAP_UNWILLING_TO_PERFORM;
 387                         *text = "invalid protocol version";
 388                 }
 389
 390                 if ( rc == LDAP_SUCCESS ) {
 391                         rc = ldap_start_tls( ld, NULL, NULL, &msgid );
 392                 }
 393
 394                 if ( rc == LDAP_SUCCESS ) {
 395                         LDAPMessage     *res = NULL;
 396                         struct timeval  tv;
 397
 398                         LDAP_BACK_TV_SET( &tv );
 399
 400 retry:;
 401                         rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
 402                         if ( rc < 0 ) {
 403                                 rc = LDAP_UNAVAILABLE;
 404
 405                         } else if ( rc == 0 ) {
 406                                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 407                                         ldap_pvt_thread_yield();
 408                                         if ( retries > 0 ) {
 409                                                 retries--;
 410                                         }
 411                                         LDAP_BACK_TV_SET( &tv );
 412                                         goto retry;
 413                                 }
 414                                 rc = LDAP_UNAVAILABLE;
 415
 416                         } else if ( rc == LDAP_RES_EXTENDED ) {
 417                                 struct berval   *data = NULL;
 418
 419                                 rc = ldap_parse_extended_result( ld, res,
 420                                                 NULL, &data, 0 );
 421                                 if ( rc == LDAP_SUCCESS ) {
 422                                         int err;
 423                                         rc = ldap_parse_result( ld, res, &err,
 424                                                 NULL, NULL, NULL, NULL, 1 );
 425                                         if ( rc == LDAP_SUCCESS ) {
 426                                                 rc = err;
 427                                         }
 428                                         res = NULL;
 429
 430                                         /* FIXME: in case a referral
 431                                          * is returned, should we try
 432                                          * using it instead of the
 433                                          * configured URI? */
 434                                         if ( rc == LDAP_SUCCESS ) {
 435                                                 rc = ldap_install_tls( ld );
 436
 437                                         } else if ( rc == LDAP_REFERRAL ) {
 438                                                 rc = LDAP_UNWILLING_TO_PERFORM;
 439                                                 *text = "unwilling to chase referral returned by Start TLS exop";
 440                                         }
 441
 442                                         if ( data ) {
 443                                                 if ( data->bv_val ) {
 444                                                         ber_memfree( data->bv_val );
 445                                                 }
 446                                                 ber_memfree( data );
 447                                         }
 448                                 }
 449
 450                         } else {
 451                                 rc = LDAP_OTHER;
 452                         }
 453
 454                         if ( res != NULL ) {
 455                                 ldap_msgfree( res );
 456                         }
 457                 }
 458 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 459                 /*
 460                  * use synchronous StartTLS
 461                  */
 462                 rc = ldap_start_tls_s( ld, NULL, NULL );
 463 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 464
 465                 /* if StartTLS is requested, only attempt it if the URL
 466                  * is not "ldaps://"; this may occur not only in case
 467                  * of misconfiguration, but also when used in the chain
 468                  * overlay, where the "uri" can be parsed out of a referral */
 469                 switch ( rc ) {
 470                 case LDAP_SUCCESS:
 471                         *is_tls = 1;
 472                         break;
 473
 474                 case LDAP_SERVER_DOWN:
 475                         break;
 476
 477                 default:
 478                         if ( LDAP_BACK_TLS_CRITICAL( &dummy ) ) {
 479                                 *text = "could not start TLS";
 480                                 break;
 481                         }
 482
 483                         /* in case Start TLS is not critical */
 484                         *is_tls = 0;
 485                         rc = LDAP_SUCCESS;
 486                         break;
 487                 }
 488
 489         } else {
 490                 *is_tls = 0;
 491         }
 492
 493         return rc;
 494 }
 495 #endif /* HAVE_TLS */
 496
 497 static int
 498 ldap_back_prepare_conn( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 499 {
 500         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 501         int             version;
 502         LDAP            *ld = NULL;
 503 #ifdef HAVE_TLS
 504         int             is_tls = op->o_conn->c_is_tls;
 505 #endif /* HAVE_TLS */
 506
 507         assert( lcp != NULL );
 508
 509         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 510         rs->sr_err = ldap_initialize( &ld, li->li_uri );
 511         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 512         if ( rs->sr_err != LDAP_SUCCESS ) {
 513                 goto error_return;
 514         }
 515
 516         if ( li->li_urllist_f ) {
 517                 ldap_set_urllist_proc( ld, li->li_urllist_f, li->li_urllist_p );
 518         }
 519
 520         /* Set LDAP version. This will always succeed: If the client
 521          * bound with a particular version, then so can we.
 522          */
 523         if ( li->li_version != 0 ) {
 524                 version = li->li_version;
 525
 526         } else if ( op->o_protocol != 0 ) {
 527                 version = op->o_protocol;
 528
 529         } else {
 530                 /* assume it's an internal op; set to LDAPv3 */
 531                 version = LDAP_VERSION3;
 532         }
 533         ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
 534
 535         /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
 536         ldap_set_option( ld, LDAP_OPT_REFERRALS,
 537                 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
 538
 539         if ( li->li_network_timeout > 0 ) {
 540                 struct timeval          tv;
 541
 542                 tv.tv_sec = li->li_network_timeout;
 543                 tv.tv_usec = 0;
 544                 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
 545         }
 546
 547 #ifdef HAVE_TLS
 548         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 549         rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
 550                         li->li_uri, li->li_flags, li->li_nretries, &rs->sr_text );
 551         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 552         if ( rs->sr_err != LDAP_SUCCESS ) {
 553                 ldap_unbind_ext( ld, NULL, NULL );
 554                 goto error_return;
 555         }
 556 #endif /* HAVE_TLS */
 557
 558         if ( *lcp == NULL ) {
 559                 *lcp = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
 560                 (*lcp)->lc_flags = li->li_flags;
 561         }
 562         (*lcp)->lc_ld = ld;
 563         (*lcp)->lc_refcnt = 1;
 564         (*lcp)->lc_binding = 1;
 565 #ifdef HAVE_TLS
 566         if ( is_tls ) {
 567                 LDAP_BACK_CONN_ISTLS_SET( *lcp );
 568         } else {
 569                 LDAP_BACK_CONN_ISTLS_CLEAR( *lcp );
 570         }
 571 #endif /* HAVE_TLS */
 572
 573 error_return:;
 574         if ( rs->sr_err != LDAP_SUCCESS ) {
 575                 rs->sr_err = slap_map_api2result( rs );
 576                 if ( sendok & LDAP_BACK_SENDERR ) {
 577                         if ( rs->sr_text == NULL ) {
 578                                 rs->sr_text = "ldap_initialize() failed";
 579                         }
 580                         send_ldap_result( op, rs );
 581                         rs->sr_text = NULL;
 582                 }
 583
 584         } else {
 585                 if ( li->li_conn_ttl > 0 ) {
 586                         (*lcp)->lc_create_time = op->o_time;
 587                 }
 588         }
 589
 590         return rs->sr_err;
 591 }
 592
 593 ldapconn_t *
 594 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 595 {
 596         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 597         ldapconn_t      *lc = NULL,
 598                         lc_curr = { 0 };
 599         int             refcnt = 1, binding = 1;
 600
 601         /* Internal searches are privileged and shared. So is root. */
 602         if ( op->o_do_not_cache || be_isroot( op ) ) {
 603                 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
 604                 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
 605                 lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
 606
 607         } else {
 608                 lc_curr.lc_local_ndn = op->o_ndn;
 609                 /* Explicit binds must not be shared */
 610                 if ( op->o_tag == LDAP_REQ_BIND || SLAP_IS_AUTHZ_BACKEND( op ) ) {
 611                         lc_curr.lc_conn = op->o_conn;
 612
 613                 } else {
 614                         lc_curr.lc_conn = LDAP_BACK_PCONN_SET( op );
 615                 }
 616         }
 617
 618         /* Explicit Bind requests always get their own conn */
 619         if ( !( sendok & LDAP_BACK_BINDING ) ) {
 620                 /* Searches for a ldapconn in the avl tree */
 621 retry_lock:
 622                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 623
 624                 lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 625                                 (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 626                 if ( lc != NULL ) {
 627                         /* Don't reuse connections while they're still binding */
 628                         if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 629                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 630                                 ldap_pvt_thread_yield();
 631                                 goto retry_lock;
 632                         }
 633                         refcnt = ++lc->lc_refcnt;
 634                         binding = ++lc->lc_binding;
 635                 }
 636                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 637         }
 638
 639         /* Looks like we didn't get a bind. Open a new session... */
 640         if ( lc == NULL ) {
 641                 if ( ldap_back_prepare_conn( &lc, op, rs, sendok ) != LDAP_SUCCESS ) {
 642                         return NULL;
 643                 }
 644                 if ( sendok & LDAP_BACK_BINDING ) {
 645                         LDAP_BACK_CONN_BINDING_SET( lc );
 646                 }
 647                 lc->lc_conn = lc_curr.lc_conn;
 648                 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
 649
 650                 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
 651                         ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
 652                         ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
 653                         LDAP_BACK_CONN_ISPRIV_SET( lc );
 654
 655                 } else {
 656                         BER_BVZERO( &lc->lc_cred );
 657                         BER_BVZERO( &lc->lc_bound_ndn );
 658 #if 0
 659                         /* FIXME: if we set lc_bound_ndn = o_ndn
 660                          * we end up with a bind with DN but no password! */
 661                         if ( !BER_BVISEMPTY( &op->o_ndn )
 662                                 && SLAP_IS_AUTHZ_BACKEND( op ) )
 663                         {
 664                                 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
 665                         }
 666 #endif
 667                 }
 668
 669 #ifdef HAVE_TLS
 670                 /* if start TLS failed but it was not mandatory,
 671                  * check if the non-TLS connection was already
 672                  * in cache; in case, destroy the newly created
 673                  * connection and use the existing one */
 674                 if ( lc->lc_conn == LDAP_BACK_PCONN_TLS
 675                                 && !ldap_tls_inplace( lc->lc_ld ) )
 676                 {
 677                         ldapconn_t *tmplc;
 678
 679                         lc_curr.lc_conn = LDAP_BACK_PCONN;
 680                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 681                         tmplc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 682                                         (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 683                         if ( tmplc != NULL ) {
 684                                 refcnt = ++tmplc->lc_refcnt;
 685                                 binding = ++tmplc->lc_binding;
 686                                 ldap_back_conn_free( lc );
 687                                 lc = tmplc;
 688                         }
 689                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 690
 691                         if ( tmplc != NULL ) {
 692                                 goto done;
 693                         }
 694                 }
 695 #endif /* HAVE_TLS */
 696
 697                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 698
 699                 /* Inserts the newly created ldapconn in the avl tree */
 700                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 701
 702                 assert( lc->lc_refcnt == 1 );
 703                 assert( lc->lc_binding == 1 );
 704                 rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 705                         ldap_back_conndn_cmp, ldap_back_conndn_dup );
 706
 707 #if PRINT_CONNTREE > 0
 708                 myprint( li->li_conninfo.lai_tree, "ldap_back_getconn" );
 709 #endif /* PRINT_CONNTREE */
 710
 711                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 712
 713                 Debug( LDAP_DEBUG_TRACE,
 714                         "=>ldap_back_getconn: conn %p inserted refcnt=%u binding=%u\n",
 715                         (void *)lc, refcnt, binding );
 716
 717                 /* Err could be -1 in case a duplicate ldapconn is inserted */
 718                 switch ( rs->sr_err ) {
 719                 case 0:
 720                         break;
 721
 722                 case -1:
 723                         if ( !( sendok & LDAP_BACK_BINDING ) ) {
 724                                 /* duplicate: free and try to get the newly created one */
 725                                 goto retry_lock;
 726                         }
 727                         /* taint connection, so that it'll be freed when released */
 728                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 729                         (void *)avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 730                                         ldap_back_conndnlc_cmp );
 731                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 732                         LDAP_BACK_CONN_TAINTED_SET( lc );
 733                         break;
 734
 735                 default:
 736                         ldap_back_conn_free( lc );
 737                         rs->sr_err = LDAP_OTHER;
 738                         rs->sr_text = "proxy bind collision";
 739                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
 740                                 send_ldap_result( op, rs );
 741                                 rs->sr_text = NULL;
 742                         }
 743                         return NULL;
 744                 }
 745
 746         } else {
 747                 char    buf[ SLAP_TEXT_BUFLEN ];
 748                 int     expiring = 0;
 749
 750                 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
 751                         || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
 752                 {
 753                         expiring = 1;
 754
 755                         /* let it be used, but taint/delete it so that
 756                          * no-one else can look it up any further */
 757                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 758                         (void *)avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 759                                         ldap_back_conndnlc_cmp );
 760                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 761                         LDAP_BACK_CONN_TAINTED_SET( lc );
 762                 }
 763
 764                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 765                         snprintf( buf, sizeof( buf ),
 766                                 "conn %p fetched refcnt=%u binding=%u%s",
 767                                 (void *)lc, refcnt, binding, expiring ? " expiring" : "" );
 768                         Debug( LDAP_DEBUG_TRACE,
 769                                 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
 770                 }
 771
 772         }
 773
 774 #ifdef HAVE_TLS
 775 done:;
 776 #endif /* HAVE_TLS */
 777         if ( li->li_idle_timeout && lc ) {
 778                 lc->lc_time = op->o_time;
 779         }
 780
 781         return lc;
 782 }
 783
 784 void
 785 ldap_back_release_conn_lock(
 786         Operation               *op,
 787         SlapReply               *rs,
 788         ldapconn_t              *lc,
 789         int                     dolock )
 790 {
 791         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 792
 793         if ( dolock ) {
 794                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 795         }
 796         assert( lc->lc_refcnt > 0 );
 797         LDAP_BACK_CONN_BINDING_CLEAR( lc );
 798         lc->lc_refcnt--;
 799         if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
 800                 ldap_back_freeconn( op, lc, 0 );
 801         }
 802         if ( dolock ) {
 803                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 804         }
 805 }
 806
 807 /*
 808  * ldap_back_dobind
 809  *
 810  * Note: as the check for the value of lc->lc_bound was already here, I removed
 811  * it from all the callers, and I made the function return the flag, so
 812  * it can be used to simplify the check.
 813  *
 814  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
 815  */
 816 static int
 817 ldap_back_dobind_int(
 818         ldapconn_t              *lc,
 819         Operation               *op,
 820         SlapReply               *rs,
 821         ldap_back_send_t        sendok,
 822         int                     retries,
 823         int                     dolock )
 824 {
 825         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 826
 827         int             rc, binding = 0;
 828         ber_int_t       msgid;
 829
 830         assert( retries >= 0 );
 831
 832 retry_lock:;
 833         if ( dolock ) {
 834                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 835         }
 836
 837         if ( binding == 0 ) {
 838                 /* check if already bound */
 839                 rc = LDAP_BACK_CONN_ISBOUND( lc );
 840                 if ( rc ) {
 841                         lc->lc_binding--;
 842                         if ( dolock ) {
 843                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 844                         }
 845                         return rc;
 846                 }
 847
 848                 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 849                         /* if someone else is about to bind it, give up and retry */
 850                         if ( dolock ) {
 851                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 852                         }
 853                         ldap_pvt_thread_yield();
 854                         goto retry_lock;
 855
 856                 } else {
 857                         /* otherwise this thread will bind it */
 858                         LDAP_BACK_CONN_BINDING_SET( lc );
 859                         binding = 1;
 860                 }
 861         }
 862
 863         /* wait for pending operations to finish */
 864         /* FIXME: may become a bottleneck! */
 865         if ( lc->lc_refcnt != lc->lc_binding ) {
 866                 if ( dolock ) {
 867                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 868                 }
 869                 ldap_pvt_thread_yield();
 870                 goto retry_lock;
 871         }
 872
 873         if ( dolock ) {
 874                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 875         }
 876
 877 #if 0
 878         while ( lc->lc_refcnt > 1 ) {
 879                 ldap_pvt_thread_yield();
 880                 rc = LDAP_BACK_CONN_ISBOUND( lc );
 881                 if ( rc ) {
 882                         return rc;
 883                 }
 884         }
 885
 886         if ( dolock ) {
 887                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 888         }
 889         LDAP_BACK_CONN_BINDING_SET( lc );
 890         if ( dolock ) {
 891                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 892         }
 893 #endif
 894
 895         /*
 896          * FIXME: we need to let clients use proxyAuthz
 897          * otherwise we cannot do symmetric pools of servers;
 898          * we have to live with the fact that a user can
 899          * authorize itself as any ID that is allowed
 900          * by the authzTo directive of the "proxyauthzdn".
 901          */
 902         /*
 903          * NOTE: current Proxy Authorization specification
 904          * and implementation do not allow proxy authorization
 905          * control to be provided with Bind requests
 906          */
 907         /*
 908          * if no bind took place yet, but the connection is bound
 909          * and the "idassert-authcDN" (or other ID) is set,
 910          * then bind as the asserting identity and explicitly
 911          * add the proxyAuthz control to every operation with the
 912          * dn bound to the connection as control value.
 913          * This is done also if this is the authrizing backend,
 914          * but the "override" flag is given to idassert.
 915          * It allows to use SASL bind and yet proxyAuthz users
 916          */
 917         if ( op->o_conn != NULL &&
 918                         !op->o_do_not_cache &&
 919                         ( BER_BVISNULL( &lc->lc_bound_ndn ) ||
 920                           ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 921         {
 922                 (void)ldap_back_proxy_authz_bind( lc, op, rs, sendok );
 923                 goto done;
 924         }
 925
 926 #ifdef HAVE_CYRUS_SASL
 927         if ( LDAP_BACK_CONN_ISPRIV( lc )
 928                 && li->li_acl_authmethod == LDAP_AUTH_SASL )
 929         {
 930                 void            *defaults = NULL;
 931
 932                 if ( li->li_acl_secprops != NULL ) {
 933                         rc = ldap_set_option( lc->lc_ld,
 934                                 LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops);
 935
 936                         if ( rc != LDAP_OPT_SUCCESS ) {
 937                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
 938                                         "(SECPROPS,\"%s\") failed!\n",
 939                                         li->li_acl_secprops, 0, 0 );
 940                                 goto done;
 941                         }
 942                 }
 943
 944                 defaults = lutil_sasl_defaults( lc->lc_ld,
 945                                 li->li_acl_sasl_mech.bv_val,
 946                                 li->li_acl_sasl_realm.bv_val,
 947                                 li->li_acl_authcID.bv_val,
 948                                 li->li_acl_passwd.bv_val,
 949                                 NULL );
 950
 951                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
 952                                 li->li_acl_authcDN.bv_val,
 953                                 li->li_acl_sasl_mech.bv_val, NULL, NULL,
 954                                 LDAP_SASL_QUIET, lutil_sasl_interact,
 955                                 defaults );
 956
 957                 lutil_sasl_freedefs( defaults );
 958
 959                 rs->sr_err = slap_map_api2result( rs );
 960                 if ( rs->sr_err != LDAP_SUCCESS ) {
 961                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 962                         send_ldap_result( op, rs );
 963
 964                 } else {
 965                         LDAP_BACK_CONN_ISBOUND_SET( lc );
 966                 }
 967                 goto done;
 968         }
 969 #endif /* HAVE_CYRUS_SASL */
 970
 971 retry:;
 972         rs->sr_err = ldap_sasl_bind( lc->lc_ld,
 973                         lc->lc_bound_ndn.bv_val,
 974                         LDAP_SASL_SIMPLE, &lc->lc_cred,
 975                         NULL, NULL, &msgid );
 976
 977         if ( rs->sr_err == LDAP_SERVER_DOWN ) {
 978                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 979                         if ( dolock ) {
 980                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 981                         }
 982
 983                         assert( lc->lc_refcnt > 0 );
 984                         if ( lc->lc_refcnt == 1 ) {
 985                                 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
 986                                 lc->lc_ld = NULL;
 987
 988                                 /* lc here must be the regular lc, reset and ready for init */
 989                                 rs->sr_err = ldap_back_prepare_conn( &lc, op, rs, sendok );
 990                                 if ( rs->sr_err != LDAP_SUCCESS ) {
 991                                         lc->lc_binding--;
 992                                         lc->lc_refcnt = 0;
 993                                 }
 994                         }
 995
 996                         if ( dolock ) {
 997                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 998                         }
 999
1000                         if ( rs->sr_err == LDAP_SUCCESS ) {
1001                                 if ( retries > 0 ) {
1002                                         retries--;
1003                                 }
1004                                 goto retry;
1005                         }
1006
1007                 } else {
1008                         if ( dolock ) {
1009                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1010                         }
1011                         lc->lc_binding--;
1012                         if ( dolock ) {
1013                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1014                         }
1015                 }
1016
1017                 lc->lc_binding--;
1018                 ldap_back_freeconn( op, lc, dolock );
1019                 rs->sr_err = slap_map_api2result( rs );
1020
1021                 return 0;
1022         }
1023
1024         rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
1025         if ( rc == LDAP_SUCCESS ) {
1026                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1027         }
1028
1029 done:;
1030         lc->lc_binding--;
1031         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1032         rc = LDAP_BACK_CONN_ISBOUND( lc );
1033         if ( !rc ) {
1034                 ldap_back_release_conn_lock( op, rs, lc, dolock );
1035         }
1036
1037         return rc;
1038 }
1039
1040 int
1041 ldap_back_dobind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1042 {
1043         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1044
1045         return ldap_back_dobind_int( lc, op, rs, sendok, li->li_nretries, 1 );
1046 }
1047
1048 /*
1049  * ldap_back_default_rebind
1050  *
1051  * This is a callback used for chasing referrals using the same
1052  * credentials as the original user on this session.
1053  */
1054 int
1055 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
1056         ber_int_t msgid, void *params )
1057 {
1058         ldapconn_t      *lc = (ldapconn_t *)params;
1059
1060 #ifdef HAVE_TLS
1061         /* ... otherwise we couldn't get here */
1062         assert( lc != NULL );
1063
1064         if ( !ldap_tls_inplace( ld ) ) {
1065                 int             is_tls = LDAP_BACK_CONN_ISTLS( lc ),
1066                                 rc;
1067                 const char      *text = NULL;
1068
1069                 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
1070                         LDAP_BACK_RETRY_DEFAULT, &text );
1071                 if ( rc != LDAP_SUCCESS ) {
1072                         return rc;
1073                 }
1074         }
1075 #endif /* HAVE_TLS */
1076
1077         /* FIXME: add checks on the URL/identity? */
1078
1079         return ldap_sasl_bind_s( ld, lc->lc_bound_ndn.bv_val,
1080                         LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
1081 }
1082
1083 /*
1084  * ldap_back_default_urllist
1085  */
1086 int
1087 ldap_back_default_urllist(
1088         LDAP            *ld,
1089         LDAPURLDesc     **urllist,
1090         LDAPURLDesc     **url,
1091         void            *params )
1092 {
1093         ldapinfo_t      *li = (ldapinfo_t *)params;
1094         LDAPURLDesc     **urltail;
1095
1096         if ( urllist == url ) {
1097                 return LDAP_SUCCESS;
1098         }
1099
1100         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
1101                 /* count */ ;
1102
1103         *urltail = *urllist;
1104         *urllist = *url;
1105         *url = NULL;
1106
1107         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1108         if ( li->li_uri ) {
1109                 ch_free( li->li_uri );
1110         }
1111
1112         ldap_get_option( ld, LDAP_OPT_URI, (void *)&li->li_uri );
1113         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1114
1115         return LDAP_SUCCESS;
1116 }
1117
1118 int
1119 ldap_back_op_result(
1120                 ldapconn_t              *lc,
1121                 Operation               *op,
1122                 SlapReply               *rs,
1123                 ber_int_t               msgid,
1124                 time_t                  timeout,
1125                 ldap_back_send_t        sendok )
1126 {
1127         char            *match = NULL;
1128         LDAPMessage     *res = NULL;
1129         char            *text = NULL;
1130
1131 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
1132
1133         rs->sr_text = NULL;
1134         rs->sr_matched = NULL;
1135
1136         /* if the error recorded in the reply corresponds
1137          * to a successful state, get the error from the
1138          * remote server response */
1139         if ( ERR_OK( rs->sr_err ) ) {
1140                 int             rc;
1141                 struct timeval  tv;
1142
1143                 if ( timeout ) {
1144                         tv.tv_sec = timeout;
1145                         tv.tv_usec = 0;
1146
1147                 } else {
1148                         LDAP_BACK_TV_SET( &tv );
1149                 }
1150
1151 retry:;
1152                 /* if result parsing fails, note the failure reason */
1153                 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1154                 switch ( rc ) {
1155                 case 0:
1156                         if ( timeout ) {
1157                                 (void)ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
1158                                 rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
1159                                         LDAP_ADMINLIMIT_EXCEEDED : LDAP_OPERATIONS_ERROR;
1160                                 rs->sr_text = "Operation timed out";
1161                                 break;
1162                         }
1163
1164                         LDAP_BACK_TV_SET( &tv );
1165                         ldap_pvt_thread_yield();
1166                         goto retry;
1167
1168                 case -1:
1169                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
1170                                         &rs->sr_err );
1171                         break;
1172
1173
1174                 /* otherwise get the result; if it is not
1175                  * LDAP_SUCCESS, record it in the reply
1176                  * structure (this includes
1177                  * LDAP_COMPARE_{TRUE|FALSE}) */
1178                 default:
1179                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
1180                                         &match, &text, NULL, NULL, 1 );
1181                         rs->sr_text = text;
1182                         if ( rc != LDAP_SUCCESS ) {
1183                                 rs->sr_err = rc;
1184                         }
1185                 }
1186         }
1187
1188         /* if the error in the reply structure is not
1189          * LDAP_SUCCESS, try to map it from client
1190          * to server error */
1191         if ( !ERR_OK( rs->sr_err ) ) {
1192                 rs->sr_err = slap_map_api2result( rs );
1193
1194                 /* internal ops ( op->o_conn == NULL )
1195                  * must not reply to client */
1196                 if ( op->o_conn && !op->o_do_not_cache && match ) {
1197
1198                         /* record the (massaged) matched
1199                          * DN into the reply structure */
1200                         rs->sr_matched = match;
1201                 }
1202         }
1203         if ( op->o_conn &&
1204                         ( ( sendok & LDAP_BACK_SENDOK )
1205                           || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1206         {
1207                 send_ldap_result( op, rs );
1208         }
1209         if ( match ) {
1210                 if ( rs->sr_matched != match ) {
1211                         free( (char *)rs->sr_matched );
1212                 }
1213                 rs->sr_matched = NULL;
1214                 ldap_memfree( match );
1215         }
1216         if ( text ) {
1217                 ldap_memfree( text );
1218         }
1219         rs->sr_text = NULL;
1220         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1221 }
1222
1223 /* return true if bound, false if failed */
1224 int
1225 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1226 {
1227         int             rc = 0;
1228         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1229
1230         assert( lcp != NULL );
1231         assert( *lcp != NULL );
1232
1233         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1234
1235         if ( (*lcp)->lc_refcnt == 1 ) {
1236                 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1237                 Debug( LDAP_DEBUG_ANY,
1238                         "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
1239                         op->o_log_prefix, li->li_uri,
1240                         BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
1241                                 "" : (*lcp)->lc_bound_ndn.bv_val );
1242                 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1243
1244                 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
1245                 (*lcp)->lc_ld = NULL;
1246                 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
1247
1248                 /* lc here must be the regular lc, reset and ready for init */
1249                 rc = ldap_back_prepare_conn( lcp, op, rs, sendok );
1250                 if ( rc != LDAP_SUCCESS ) {
1251                         rc = 0;
1252                         *lcp = NULL;
1253
1254                 } else {
1255                         rc = ldap_back_dobind_int( *lcp, op, rs, sendok, 0, 0 );
1256                         if ( rc == 0 ) {
1257                                 *lcp = NULL;
1258                         }
1259                 }
1260
1261         } else {
1262                 Debug( LDAP_DEBUG_TRACE,
1263                         "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
1264                         (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
1265
1266                 ldap_back_release_conn_lock( op, rs, *lcp, 0 );
1267                 *lcp = NULL;
1268
1269                 if ( sendok ) {
1270                         rs->sr_err = LDAP_UNAVAILABLE;
1271                         rs->sr_text = "unable to retry";
1272                         send_ldap_result( op, rs );
1273                 }
1274         }
1275
1276         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1277
1278         return rc;
1279 }
1280
1281 static int
1282 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1283 {
1284         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1285         struct berval   binddn = slap_empty_bv;
1286         struct berval   bindcred = slap_empty_bv;
1287         struct berval   ndn;
1288         int             dobind = 0;
1289         int             msgid;
1290         int             rc;
1291
1292         /* don't proxyAuthz if protocol is not LDAPv3 */
1293         switch ( li->li_version ) {
1294         case LDAP_VERSION3:
1295                 break;
1296
1297         case 0:
1298                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1299                         break;
1300                 }
1301                 /* fall thru */
1302
1303         default:
1304                 goto done;
1305         }
1306
1307         if ( op->o_tag == LDAP_REQ_BIND ) {
1308                 ndn = op->o_req_ndn;
1309
1310         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1311                 ndn = op->o_conn->c_ndn;
1312
1313         } else {
1314                 ndn = op->o_ndn;
1315         }
1316
1317         /*
1318          * FIXME: we need to let clients use proxyAuthz
1319          * otherwise we cannot do symmetric pools of servers;
1320          * we have to live with the fact that a user can
1321          * authorize itself as any ID that is allowed
1322          * by the authzTo directive of the "proxyauthzdn".
1323          */
1324         /*
1325          * NOTE: current Proxy Authorization specification
1326          * and implementation do not allow proxy authorization
1327          * control to be provided with Bind requests
1328          */
1329         /*
1330          * if no bind took place yet, but the connection is bound
1331          * and the "proxyauthzdn" is set, then bind as
1332          * "proxyauthzdn" and explicitly add the proxyAuthz
1333          * control to every operation with the dn bound
1334          * to the connection as control value.
1335          */
1336
1337         /* bind as proxyauthzdn only if no idassert mode
1338          * is requested, or if the client's identity
1339          * is authorized */
1340         switch ( li->li_idassert_mode ) {
1341         case LDAP_BACK_IDASSERT_LEGACY:
1342                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1343                         if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
1344                         {
1345                                 binddn = li->li_idassert_authcDN;
1346                                 bindcred = li->li_idassert_passwd;
1347                                 dobind = 1;
1348                         }
1349                 }
1350                 break;
1351
1352         default:
1353                 /* NOTE: rootdn can always idassert */
1354                 if ( BER_BVISNULL( &ndn ) && li->li_idassert_authz == NULL ) {
1355                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1356                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1357                                 if ( sendok & LDAP_BACK_SENDERR ) {
1358                                         send_ldap_result( op, rs );
1359                                 }
1360                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1361
1362                         } else {
1363                                 rs->sr_err = LDAP_SUCCESS;
1364                                 binddn = slap_empty_bv;
1365                                 bindcred = slap_empty_bv;
1366                                 break;
1367                         }
1368
1369                         goto done;
1370
1371                 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1372                         struct berval authcDN;
1373
1374                         if ( BER_BVISNULL( &ndn ) ) {
1375                                 authcDN = slap_empty_bv;
1376
1377                         } else {
1378                                 authcDN = ndn;
1379                         }
1380                         rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
1381                                         &authcDN, &authcDN );
1382                         if ( rs->sr_err != LDAP_SUCCESS ) {
1383                                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1384                                         if ( sendok & LDAP_BACK_SENDERR ) {
1385                                                 send_ldap_result( op, rs );
1386                                         }
1387                                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1388
1389                                 } else {
1390                                         rs->sr_err = LDAP_SUCCESS;
1391                                         binddn = slap_empty_bv;
1392                                         bindcred = slap_empty_bv;
1393                                         break;
1394                                 }
1395
1396                                 goto done;
1397                         }
1398                 }
1399
1400                 binddn = li->li_idassert_authcDN;
1401                 bindcred = li->li_idassert_passwd;
1402                 dobind = 1;
1403                 break;
1404         }
1405
1406         if ( dobind && li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1407 #ifdef HAVE_CYRUS_SASL
1408                 void            *defaults = NULL;
1409                 struct berval   authzID = BER_BVNULL;
1410                 int             freeauthz = 0;
1411
1412                 /* if SASL supports native authz, prepare for it */
1413                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1414                                 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1415                 {
1416                         switch ( li->li_idassert_mode ) {
1417                         case LDAP_BACK_IDASSERT_OTHERID:
1418                         case LDAP_BACK_IDASSERT_OTHERDN:
1419                                 authzID = li->li_idassert_authzID;
1420                                 break;
1421
1422                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1423                                 BER_BVSTR( &authzID, "dn:" );
1424                                 break;
1425
1426                         case LDAP_BACK_IDASSERT_SELF:
1427                                 if ( BER_BVISNULL( &ndn ) ) {
1428                                         /* connection is not authc'd, so don't idassert */
1429                                         BER_BVSTR( &authzID, "dn:" );
1430                                         break;
1431                                 }
1432                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1433                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1434                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1435                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1436                                                 ndn.bv_val, ndn.bv_len + 1 );
1437                                 freeauthz = 1;
1438                                 break;
1439
1440                         default:
1441                                 break;
1442                         }
1443                 }
1444
1445                 if ( li->li_idassert_secprops != NULL ) {
1446                         rs->sr_err = ldap_set_option( lc->lc_ld,
1447                                 LDAP_OPT_X_SASL_SECPROPS,
1448                                 (void *)li->li_idassert_secprops );
1449
1450                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1451                                 rs->sr_err = LDAP_OTHER;
1452                                 if ( sendok & LDAP_BACK_SENDERR ) {
1453                                         send_ldap_result( op, rs );
1454                                 }
1455                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1456                                 goto done;
1457                         }
1458                 }
1459
1460                 defaults = lutil_sasl_defaults( lc->lc_ld,
1461                                 li->li_idassert_sasl_mech.bv_val,
1462                                 li->li_idassert_sasl_realm.bv_val,
1463                                 li->li_idassert_authcID.bv_val,
1464                                 li->li_idassert_passwd.bv_val,
1465                                 authzID.bv_val );
1466
1467                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn.bv_val,
1468                                 li->li_idassert_sasl_mech.bv_val, NULL, NULL,
1469                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1470                                 defaults );
1471
1472                 rs->sr_err = slap_map_api2result( rs );
1473                 if ( rs->sr_err != LDAP_SUCCESS ) {
1474                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1475                         if ( sendok & LDAP_BACK_SENDERR ) {
1476                                 send_ldap_result( op, rs );
1477                         }
1478
1479                 } else {
1480                         LDAP_BACK_CONN_ISBOUND_SET( lc );
1481                 }
1482
1483                 lutil_sasl_freedefs( defaults );
1484                 if ( freeauthz ) {
1485                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1486                 }
1487
1488                 goto done;
1489 #endif /* HAVE_CYRUS_SASL */
1490         }
1491
1492         switch ( li->li_idassert_authmethod ) {
1493         case LDAP_AUTH_NONE:
1494                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1495                 goto done;
1496
1497         case LDAP_AUTH_SIMPLE:
1498                 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1499                                 binddn.bv_val, LDAP_SASL_SIMPLE,
1500                                 &bindcred, NULL, NULL, &msgid );
1501                 break;
1502
1503         default:
1504                 /* unsupported! */
1505                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1506                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1507                 if ( sendok & LDAP_BACK_SENDERR ) {
1508                         send_ldap_result( op, rs );
1509                 }
1510                 goto done;
1511         }
1512
1513         rc = ldap_back_op_result( lc, op, rs, msgid, 0, sendok );
1514         if ( rc == LDAP_SUCCESS ) {
1515                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1516         }
1517 done:;
1518         return LDAP_BACK_CONN_ISBOUND( lc );
1519 }
1520
1521 /*
1522  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
1523  * to existing server-side controls if required; if not,
1524  * the existing server-side controls are placed in *pctrls.
1525  * The caller, after using the controls in client API
1526  * operations, if ( *pctrls != op->o_ctrls ), should
1527  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
1528  * The function returns success if the control could
1529  * be added if required, or if it did nothing; in the future,
1530  * it might return some error if it failed.
1531  *
1532  * if no bind took place yet, but the connection is bound
1533  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
1534  * and explicitly add proxyAuthz the control to every operation
1535  * with the dn bound to the connection as control value.
1536  *
1537  * If no server-side controls are defined for the operation,
1538  * simply add the proxyAuthz control; otherwise, if the
1539  * proxyAuthz control is not already set, add it as
1540  * the first one
1541  *
1542  * FIXME: is controls order significant for security?
1543  * ANSWER: controls ordering and interoperability
1544  * must be indicated by the specs of each control; if none
1545  * is specified, the order is irrelevant.
1546  */
1547 int
1548 ldap_back_proxy_authz_ctrl(
1549                 ldapconn_t      *lc,
1550                 Operation       *op,
1551                 SlapReply       *rs,
1552                 LDAPControl     ***pctrls )
1553 {
1554         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
1555         LDAPControl     **ctrls = NULL;
1556         int             i = 0,
1557                         mode;
1558         struct berval   assertedID,
1559                         ndn;
1560
1561         *pctrls = NULL;
1562
1563         rs->sr_err = LDAP_SUCCESS;
1564
1565         /* don't proxyAuthz if protocol is not LDAPv3 */
1566         switch ( li->li_version ) {
1567         case LDAP_VERSION3:
1568                 break;
1569
1570         case 0:
1571                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1572                         break;
1573                 }
1574                 /* fall thru */
1575
1576         default:
1577                 goto done;
1578         }
1579
1580         /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
1581          * but if it is not set this test fails.  We need a different
1582          * means to detect if idassert is enabled */
1583         if ( ( BER_BVISNULL( &li->li_idassert_authcID ) || BER_BVISEMPTY( &li->li_idassert_authcID ) )
1584                         && ( BER_BVISNULL( &li->li_idassert_authcDN ) || BER_BVISEMPTY( &li->li_idassert_authcDN ) ) )
1585         {
1586                 goto done;
1587         }
1588
1589         if ( !op->o_conn || op->o_do_not_cache || be_isroot( op ) ) {
1590                 goto done;
1591         }
1592
1593         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1594                 ndn = op->o_conn->c_ndn;
1595
1596         } else {
1597                 ndn = op->o_ndn;
1598         }
1599
1600         if ( li->li_idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
1601                 if ( op->o_proxy_authz ) {
1602                         /*
1603                          * FIXME: we do not want to perform proxyAuthz
1604                          * on behalf of the client, because this would
1605                          * be performed with "proxyauthzdn" privileges.
1606                          *
1607                          * This might actually be too strict, since
1608                          * the "proxyauthzdn" authzTo, and each entry's
1609                          * authzFrom attributes may be crafted
1610                          * to avoid unwanted proxyAuthz to take place.
1611                          */
1612 #if 0
1613                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1614                         rs->sr_text = "proxyAuthz not allowed within namingContext";
1615 #endif
1616                         goto done;
1617                 }
1618
1619                 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
1620                         goto done;
1621                 }
1622
1623                 if ( BER_BVISNULL( &ndn ) ) {
1624                         goto done;
1625                 }
1626
1627                 if ( BER_BVISNULL( &li->li_idassert_authcDN ) ) {
1628                         goto done;
1629                 }
1630
1631         } else if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1632                 if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ )
1633                                 /* && ( !BER_BVISNULL( &ndn )
1634                                         || LDAP_BACK_CONN_ISBOUND( lc ) ) */ )
1635                 {
1636                         /* already asserted in SASL via native authz */
1637                         /* NOTE: the test on lc->lc_bound is used to trap
1638                          * native authorization of anonymous users,
1639                          * since in that case ndn is NULL */
1640                         goto done;
1641                 }
1642
1643         } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1644                 int             rc;
1645                 struct berval authcDN;
1646
1647                 if ( BER_BVISNULL( &ndn ) ) {
1648                         authcDN = slap_empty_bv;
1649                 } else {
1650                         authcDN = ndn;
1651                 }
1652                 rc = slap_sasl_matches( op, li->li_idassert_authz,
1653                                 &authcDN, & authcDN );
1654                 if ( rc != LDAP_SUCCESS ) {
1655                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE )
1656                         {
1657                                 /* ndn is not authorized
1658                                  * to use idassert */
1659                                 rs->sr_err = rc;
1660                         }
1661                         goto done;
1662                 }
1663         }
1664
1665         if ( op->o_proxy_authz ) {
1666                 /*
1667                  * FIXME: we can:
1668                  * 1) ignore the already set proxyAuthz control
1669                  * 2) leave it in place, and don't set ours
1670                  * 3) add both
1671                  * 4) reject the operation
1672                  *
1673                  * option (4) is very drastic
1674                  * option (3) will make the remote server reject
1675                  * the operation, thus being equivalent to (4)
1676                  * option (2) will likely break the idassert
1677                  * assumptions, so we cannot accept it;
1678                  * option (1) means that we are contradicting
1679                  * the client's reques.
1680                  *
1681                  * I think (4) is the only correct choice.
1682                  */
1683                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1684                 rs->sr_text = "proxyAuthz not allowed within namingContext";
1685         }
1686
1687         if ( op->o_is_auth_check ) {
1688                 mode = LDAP_BACK_IDASSERT_NOASSERT;
1689
1690         } else {
1691                 mode = li->li_idassert_mode;
1692         }
1693
1694         switch ( mode ) {
1695         case LDAP_BACK_IDASSERT_SELF:
1696                 if ( BER_BVISNULL( &ndn ) ) {
1697                         goto done;
1698                 }
1699                 assertedID = ndn;
1700                 break;
1701
1702         case LDAP_BACK_IDASSERT_LEGACY:
1703                 /* original behavior:
1704                  * assert the client's identity */
1705                 if ( BER_BVISNULL( &ndn ) ) {
1706                         assertedID = slap_empty_bv;
1707                 } else {
1708                         assertedID = ndn;
1709                 }
1710                 break;
1711
1712         case LDAP_BACK_IDASSERT_ANONYMOUS:
1713                 /* assert "anonymous" */
1714                 assertedID = slap_empty_bv;
1715                 break;
1716
1717         case LDAP_BACK_IDASSERT_NOASSERT:
1718                 /* don't assert; bind as proxyauthzdn */
1719                 goto done;
1720
1721         case LDAP_BACK_IDASSERT_OTHERID:
1722         case LDAP_BACK_IDASSERT_OTHERDN:
1723                 /* assert idassert DN */
1724                 assertedID = li->li_idassert_authzID;
1725                 break;
1726
1727         default:
1728                 assert( 0 );
1729         }
1730
1731         if ( BER_BVISNULL( &assertedID ) ) {
1732                 assertedID = slap_empty_bv;
1733         }
1734
1735         /* don't idassert the bound DN (ITS#4497) */
1736         if ( dn_match( &assertedID, &lc->lc_bound_ndn ) ) {
1737                 goto done;
1738         }
1739
1740         if ( op->o_ctrls ) {
1741                 for ( i = 0; op->o_ctrls[ i ]; i++ )
1742                         /* just count ctrls */ ;
1743         }
1744
1745         ctrls = op->o_tmpalloc( sizeof( LDAPControl * ) * (i + 2) + sizeof( LDAPControl ),
1746                         op->o_tmpmemctx );
1747         ctrls[ 0 ] = (LDAPControl *)&ctrls[ i + 2 ];
1748
1749         ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
1750         ctrls[ 0 ]->ldctl_iscritical = 1;
1751
1752         switch ( li->li_idassert_mode ) {
1753         /* already in u:ID or dn:DN form */
1754         case LDAP_BACK_IDASSERT_OTHERID:
1755         case LDAP_BACK_IDASSERT_OTHERDN:
1756                 ber_dupbv_x( &ctrls[ 0 ]->ldctl_value, &assertedID, op->o_tmpmemctx );
1757                 break;
1758
1759         /* needs the dn: prefix */
1760         default:
1761                 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
1762                 ctrls[ 0 ]->ldctl_value.bv_val = op->o_tmpalloc( ctrls[ 0 ]->ldctl_value.bv_len + 1,
1763                                 op->o_tmpmemctx );
1764                 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
1765                 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
1766                                 assertedID.bv_val, assertedID.bv_len + 1 );
1767                 break;
1768         }
1769
1770         /* Older versions of <draft-weltman-ldapv3-proxy> required
1771          * to encode the value of the authzID (and called it proxyDN);
1772          * this hack provides compatibility with those DSAs that
1773          * implement it this way */
1774         if ( li->li_idassert_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
1775                 struct berval           authzID = ctrls[ 0 ]->ldctl_value;
1776                 BerElementBuffer        berbuf;
1777                 BerElement              *ber = (BerElement *)&berbuf;
1778                 ber_tag_t               tag;
1779
1780                 ber_init2( ber, 0, LBER_USE_DER );
1781                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
1782
1783                 tag = ber_printf( ber, "O", &authzID );
1784                 if ( tag == LBER_ERROR ) {
1785                         rs->sr_err = LDAP_OTHER;
1786                         goto free_ber;
1787                 }
1788
1789                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
1790                         rs->sr_err = LDAP_OTHER;
1791                         goto free_ber;
1792                 }
1793
1794 free_ber:;
1795                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
1796                 ber_free_buf( ber );
1797
1798                 if ( rs->sr_err != LDAP_SUCCESS ) {
1799                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
1800                         ctrls = NULL;
1801                         goto done;
1802                 }
1803
1804         } else if ( li->li_idassert_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
1805                 struct berval           authzID = ctrls[ 0 ]->ldctl_value,
1806                                         tmp;
1807                 BerElementBuffer        berbuf;
1808                 BerElement              *ber = (BerElement *)&berbuf;
1809                 ber_tag_t               tag;
1810
1811                 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
1812                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
1813                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
1814                         ctrls = NULL;
1815                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1816                         goto done;
1817                 }
1818
1819                 tmp = authzID;
1820                 tmp.bv_val += STRLENOF( "dn:" );
1821                 tmp.bv_len -= STRLENOF( "dn:" );
1822
1823                 ber_init2( ber, 0, LBER_USE_DER );
1824                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
1825
1826                 /* apparently, Mozilla API encodes this
1827                  * as "SEQUENCE { LDAPDN }" */
1828                 tag = ber_printf( ber, "{O}", &tmp );
1829                 if ( tag == LBER_ERROR ) {
1830                         rs->sr_err = LDAP_OTHER;
1831                         goto free_ber2;
1832                 }
1833
1834                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
1835                         rs->sr_err = LDAP_OTHER;
1836                         goto free_ber2;
1837                 }
1838
1839 free_ber2:;
1840                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
1841                 ber_free_buf( ber );
1842
1843                 if ( rs->sr_err != LDAP_SUCCESS ) {
1844                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
1845                         ctrls = NULL;
1846                         goto done;
1847                 }
1848
1849                 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
1850         }
1851
1852         if ( op->o_ctrls ) {
1853                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1854                         ctrls[ i + 1 ] = op->o_ctrls[ i ];
1855                 }
1856         }
1857         ctrls[ i + 1 ] = NULL;
1858
1859 done:;
1860         if ( ctrls == NULL ) {
1861                 ctrls = op->o_ctrls;
1862         }
1863
1864         *pctrls = ctrls;
1865
1866         return rs->sr_err;
1867 }
1868
1869 int
1870 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
1871 {
1872         LDAPControl     **ctrls = *pctrls;
1873
1874         /* we assume that the first control is the proxyAuthz
1875          * added by back-ldap, so it's the only one we explicitly
1876          * free */
1877         if ( ctrls && ctrls != op->o_ctrls ) {
1878                 assert( ctrls[ 0 ] != NULL );
1879
1880                 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
1881                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
1882                 }
1883
1884                 op->o_tmpfree( ctrls, op->o_tmpmemctx );
1885         }
1886
1887         *pctrls = NULL;
1888
1889         return 0;
1890 }