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 1999-2007 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 #undef ldap_debug       /* silence a warning in ldap-int.h */
  36 #include "../../../libraries/libldap/ldap-int.h"
  37
  38 #include "lutil_ldap.h"
  39
  40 #define LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ       "2.16.840.1.113730.3.4.12"
  41
  42 #if LDAP_BACK_PRINT_CONNTREE > 0
  43 static void
  44 ldap_back_ravl_print( Avlnode *root, int depth )
  45 {
  46         int             i;
  47         ldapconn_t      *lc;
  48
  49         if ( root == 0 ) {
  50                 return;
  51         }
  52
  53         ldap_back_ravl_print( root->avl_right, depth+1 );
  54
  55         for ( i = 0; i < depth; i++ ) {
  56                 fprintf( stderr, "-" );
  57         }
  58
  59         lc = root->avl_data;
  60         fprintf( stderr, "lc=%p local=\"%s\" conn=%p %s refcnt=%d flags=0x%08x\n",
  61                 (void *)lc,
  62                 lc->lc_local_ndn.bv_val ? lc->lc_local_ndn.bv_val : "",
  63                 (void *)lc->lc_conn,
  64                 avl_bf2str( root->avl_bf ), lc->lc_refcnt, lc->lc_lcflags );
  65
  66         ldap_back_ravl_print( root->avl_left, depth+1 );
  67 }
  68
  69 static char* priv2str[] = {
  70         "privileged",
  71         "privileged/TLS",
  72         "anonymous",
  73         "anonymous/TLS",
  74         "bind",
  75         "bind/TLS",
  76         NULL
  77 };
  78
  79 void
  80 ldap_back_print_conntree( ldapinfo_t *li, char *msg )
  81 {
  82         int     c;
  83
  84         fprintf( stderr, "========> %s\n", msg );
  85
  86         for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) {
  87                 int             i = 0;
  88                 ldapconn_t      *lc;
  89
  90                 fprintf( stderr, "  %s[%d]\n", priv2str[ c ], li->li_conn_priv[ c ].lic_num );
  91
  92                 LDAP_TAILQ_FOREACH( lc, &li->li_conn_priv[ c ].lic_priv, lc_q )
  93                 {
  94                         fprintf( stderr, "    [%d] lc=%p local=\"%s\" conn=%p refcnt=%d flags=0x%08x\n",
  95                                 i,
  96                                 (void *)lc,
  97                                 lc->lc_local_ndn.bv_val ? lc->lc_local_ndn.bv_val : "",
  98                                 (void *)lc->lc_conn, lc->lc_refcnt, lc->lc_lcflags );
  99                         i++;
 100                 }
 101         }
 102
 103         if ( li->li_conninfo.lai_tree == 0 ) {
 104                 fprintf( stderr, "\t(empty)\n" );
 105
 106         } else {
 107                 ldap_back_ravl_print( li->li_conninfo.lai_tree, 0 );
 108         }
 109
 110         fprintf( stderr, "<======== %s\n", msg );
 111 }
 112 #endif /* LDAP_BACK_PRINT_CONNTREE */
 113
 114 static int
 115 ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock );
 116
 117 static ldapconn_t *
 118 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
 119         struct berval *binddn, struct berval *bindcred );
 120
 121 static int
 122 ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
 123         struct berval *binddn, struct berval *bindcred );
 124
 125 static int
 126 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs,
 127         ldap_back_send_t sendok, struct berval *binddn, struct berval *bindcred );
 128
 129 static int
 130 ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs,
 131         ldap_back_send_t sendok );
 132
 133 static int
 134 ldap_back_conndnlc_cmp( const void *c1, const void *c2 );
 135
 136 ldapconn_t *
 137 ldap_back_conn_delete( ldapinfo_t *li, ldapconn_t *lc )
 138 {
 139         if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
 140                 if ( LDAP_BACK_CONN_CACHED( lc ) ) {
 141                         assert( lc->lc_q.tqe_prev != NULL );
 142                         assert( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num > 0 );
 143                         li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num--;
 144                         LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
 145                         LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
 146                         LDAP_BACK_CONN_CACHED_CLEAR( lc );
 147
 148                 } else {
 149                         assert( LDAP_BACK_CONN_TAINTED( lc ) );
 150                         assert( lc->lc_q.tqe_prev == NULL );
 151                 }
 152
 153         } else {
 154                 ldapconn_t      *tmplc = NULL;
 155
 156                 if ( LDAP_BACK_CONN_CACHED( lc ) ) {
 157                         assert( !LDAP_BACK_CONN_TAINTED( lc ) );
 158                         tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 159                                 ldap_back_conndnlc_cmp );
 160                         assert( tmplc == lc );
 161                         LDAP_BACK_CONN_CACHED_CLEAR( lc );
 162                 }
 163
 164                 assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc );
 165         }
 166
 167         return lc;
 168 }
 169
 170 int
 171 ldap_back_bind( Operation *op, SlapReply *rs )
 172 {
 173         ldapinfo_t              *li = (ldapinfo_t *) op->o_bd->be_private;
 174         ldapconn_t              *lc;
 175
 176         int                     rc = 0;
 177         ber_int_t               msgid;
 178         ldap_back_send_t        retrying = LDAP_BACK_RETRYING;
 179
 180         lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR, NULL, NULL );
 181         if ( !lc ) {
 182                 return rs->sr_err;
 183         }
 184
 185         /* we can do (almost) whatever we want with this conn,
 186          * because either it's temporary, or it's marked as binding */
 187         if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
 188                 ch_free( lc->lc_bound_ndn.bv_val );
 189                 BER_BVZERO( &lc->lc_bound_ndn );
 190         }
 191         if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 192                 memset( lc->lc_cred.bv_val, 0, lc->lc_cred.bv_len );
 193                 ch_free( lc->lc_cred.bv_val );
 194                 BER_BVZERO( &lc->lc_cred );
 195         }
 196         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 197
 198 retry:;
 199         /* method is always LDAP_AUTH_SIMPLE if we got here */
 200         rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
 201                         LDAP_SASL_SIMPLE,
 202                         &op->orb_cred, op->o_ctrls, NULL, &msgid );
 203         /* FIXME: should we always retry, or only when piping the bind
 204          * in the "override" connection pool? */
 205         rc = ldap_back_op_result( lc, op, rs, msgid,
 206                 li->li_timeout[ SLAP_OP_BIND ],
 207                 LDAP_BACK_BIND_SERR | retrying );
 208         if ( rc == LDAP_UNAVAILABLE && retrying ) {
 209                 retrying &= ~LDAP_BACK_RETRYING;
 210                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_BIND_SERR ) ) {
 211                         goto retry;
 212                 }
 213         }
 214
 215         if ( rc == LDAP_SUCCESS ) {
 216                 /* If defined, proxyAuthz will be used also when
 217                  * back-ldap is the authorizing backend; for this
 218                  * purpose, after a successful bind the connection
 219                  * is left for further binds, and further operations
 220                  * on this client connection will use a default
 221                  * connection with identity assertion */
 222                 /* NOTE: use with care */
 223                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 224                         ldap_back_release_conn( li, lc );
 225                         return( rc );
 226                 }
 227
 228                 /* rebind is now done inside ldap_back_proxy_authz_bind()
 229                  * in case of success */
 230                 LDAP_BACK_CONN_ISBOUND_SET( lc );
 231                 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
 232
 233                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 234                         memset( lc->lc_cred.bv_val, 0,
 235                                         lc->lc_cred.bv_len );
 236                 }
 237
 238                 if ( LDAP_BACK_SAVECRED( li ) ) {
 239                         ber_bvreplace( &lc->lc_cred, &op->orb_cred );
 240                         ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
 241
 242                 } else {
 243                         lc->lc_cred.bv_len = 0;
 244                 }
 245         }
 246
 247         /* must re-insert if local DN changed as result of bind */
 248         if ( !LDAP_BACK_CONN_ISBOUND( lc )
 249                 || ( !dn_match( &op->o_req_ndn, &lc->lc_local_ndn )
 250                         && !LDAP_BACK_PCONN_ISPRIV( lc ) ) )
 251         {
 252                 int             lerr = -1;
 253                 ldapconn_t      *tmplc;
 254
 255                 /* wait for all other ops to release the connection */
 256 retry_lock:;
 257                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 258                 if ( lc->lc_refcnt > 1 ) {
 259                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 260                         ldap_pvt_thread_yield();
 261                         goto retry_lock;
 262                 }
 263
 264 #if LDAP_BACK_PRINT_CONNTREE > 0
 265                 ldap_back_print_conntree( li, ">>> ldap_back_bind" );
 266 #endif /* LDAP_BACK_PRINT_CONNTREE */
 267
 268                 assert( lc->lc_refcnt == 1 );
 269                 ldap_back_conn_delete( li, lc );
 270
 271                 /* delete all cached connections with the current connection */
 272                 if ( LDAP_BACK_SINGLECONN( li ) ) {
 273                         while ( ( tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, ldap_back_conn_cmp ) ) != NULL )
 274                         {
 275                                 Debug( LDAP_DEBUG_TRACE,
 276                                         "=>ldap_back_bind: destroying conn %ld (refcnt=%u)\n",
 277                                         LDAP_BACK_PCONN_ID( lc ), lc->lc_refcnt, 0 );
 278
 279                                 if ( tmplc->lc_refcnt != 0 ) {
 280                                         /* taint it */
 281                                         LDAP_BACK_CONN_TAINTED_SET( tmplc );
 282                                         LDAP_BACK_CONN_CACHED_CLEAR( tmplc );
 283
 284                                 } else {
 285                                         /*
 286                                          * Needs a test because the handler may be corrupted,
 287                                          * and calling ldap_unbind on a corrupted header results
 288                                          * in a segmentation fault
 289                                          */
 290                                         ldap_back_conn_free( tmplc );
 291                                 }
 292                         }
 293                 }
 294
 295                 if ( LDAP_BACK_CONN_ISBOUND( lc ) ) {
 296                         ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
 297                         if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 298                                 LDAP_BACK_PCONN_ROOTDN_SET( lc, op );
 299                         }
 300                         lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 301                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 302                 }
 303
 304 #if LDAP_BACK_PRINT_CONNTREE > 0
 305                 ldap_back_print_conntree( li, "<<< ldap_back_bind" );
 306 #endif /* LDAP_BACK_PRINT_CONNTREE */
 307
 308                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 309                 switch ( lerr ) {
 310                 case 0:
 311                         LDAP_BACK_CONN_CACHED_SET( lc );
 312                         break;
 313
 314                 case -1:
 315                         /* duplicate; someone else successfully bound
 316                          * on the same connection with the same identity;
 317                          * we can do this because lc_refcnt == 1 */
 318                         ldap_back_conn_free( lc );
 319                         lc = NULL;
 320                 }
 321         }
 322
 323         if ( lc != NULL ) {
 324                 ldap_back_release_conn( li, lc );
 325         }
 326
 327         return( rc );
 328 }
 329
 330 /*
 331  * ldap_back_conndn_cmp
 332  *
 333  * compares two ldapconn_t based on the value of the conn pointer
 334  * and of the local DN; used by avl stuff for insert, lookup
 335  * and direct delete
 336  */
 337 int
 338 ldap_back_conndn_cmp( const void *c1, const void *c2 )
 339 {
 340         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 341         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 342         int rc;
 343
 344         /* If local DNs don't match, it is definitely not a match */
 345         /* For shared sessions, conn is NULL. Only explicitly
 346          * bound sessions will have non-NULL conn.
 347          */
 348         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 349         if ( rc == 0 ) {
 350                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 351         }
 352
 353         return rc;
 354 }
 355
 356 /*
 357  * ldap_back_conndnlc_cmp
 358  *
 359  * compares two ldapconn_t based on the value of the conn pointer,
 360  * the local DN and the lc pointer; used by avl stuff for insert, lookup
 361  * and direct delete
 362  */
 363 static int
 364 ldap_back_conndnlc_cmp( const void *c1, const void *c2 )
 365 {
 366         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 367         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 368         int rc;
 369
 370         /* If local DNs don't match, it is definitely not a match */
 371         /* For shared sessions, conn is NULL. Only explicitly
 372          * bound sessions will have non-NULL conn.
 373          */
 374         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 375         if ( rc == 0 ) {
 376                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 377                 if ( rc == 0 ) {
 378                         rc = SLAP_PTRCMP( lc1, lc2 );
 379                 }
 380         }
 381
 382         return rc;
 383 }
 384
 385 /*
 386  * ldap_back_conn_cmp
 387  *
 388  * compares two ldapconn_t based on the value of the conn pointer;
 389  * used by avl stuff for delete of all conns with the same connid
 390  */
 391 int
 392 ldap_back_conn_cmp( const void *c1, const void *c2 )
 393 {
 394         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 395         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 396
 397         /* For shared sessions, conn is NULL. Only explicitly
 398          * bound sessions will have non-NULL conn.
 399          */
 400         return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 401 }
 402
 403 /*
 404  * ldap_back_conndn_dup
 405  *
 406  * returns -1 in case a duplicate ldapconn_t has been inserted;
 407  * used by avl stuff
 408  */
 409 int
 410 ldap_back_conndn_dup( void *c1, void *c2 )
 411 {
 412         ldapconn_t      *lc1 = (ldapconn_t *)c1;
 413         ldapconn_t      *lc2 = (ldapconn_t *)c2;
 414
 415         /* Cannot have more than one shared session with same DN */
 416         if ( lc1->lc_conn == lc2->lc_conn &&
 417                 dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) )
 418         {
 419                 return -1;
 420         }
 421
 422         return 0;
 423 }
 424
 425 static int
 426 ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock )
 427 {
 428         if ( dolock ) {
 429                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 430         }
 431
 432 #if LDAP_BACK_PRINT_CONNTREE > 0
 433         ldap_back_print_conntree( li, ">>> ldap_back_freeconn" );
 434 #endif /* LDAP_BACK_PRINT_CONNTREE */
 435
 436         (void)ldap_back_conn_delete( li, lc );
 437
 438         if ( lc->lc_refcnt == 0 ) {
 439                 ldap_back_conn_free( (void *)lc );
 440         }
 441
 442 #if LDAP_BACK_PRINT_CONNTREE > 0
 443         ldap_back_print_conntree( li, "<<< ldap_back_freeconn" );
 444 #endif /* LDAP_BACK_PRINT_CONNTREE */
 445
 446         if ( dolock ) {
 447                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 448         }
 449
 450         return 0;
 451 }
 452
 453 #ifdef HAVE_TLS
 454 static int
 455 ldap_back_start_tls(
 456         LDAP            *ld,
 457         int             protocol,
 458         int             *is_tls,
 459         const char      *url,
 460         unsigned        flags,
 461         int             retries,
 462         const char      **text )
 463 {
 464         int             rc = LDAP_SUCCESS;
 465
 466         /* start TLS ("tls-[try-]{start,propagate}" statements) */
 467         if ( ( LDAP_BACK_USE_TLS_F( flags ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS_F( flags ) ) )
 468                                 && !ldap_is_ldaps_url( url ) )
 469         {
 470 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
 471                 /*
 472                  * use asynchronous StartTLS
 473                  * in case, chase referral (not implemented yet)
 474                  */
 475                 int             msgid;
 476
 477                 if ( protocol == 0 ) {
 478                         ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
 479                                         (void *)&protocol );
 480                 }
 481
 482                 if ( protocol < LDAP_VERSION3 ) {
 483                         /* we should rather bail out... */
 484                         rc = LDAP_UNWILLING_TO_PERFORM;
 485                         *text = "invalid protocol version";
 486                 }
 487
 488                 if ( rc == LDAP_SUCCESS ) {
 489                         rc = ldap_start_tls( ld, NULL, NULL, &msgid );
 490                 }
 491
 492                 if ( rc == LDAP_SUCCESS ) {
 493                         LDAPMessage     *res = NULL;
 494                         struct timeval  tv;
 495
 496                         LDAP_BACK_TV_SET( &tv );
 497
 498 retry:;
 499                         rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
 500                         if ( rc < 0 ) {
 501                                 rc = LDAP_UNAVAILABLE;
 502
 503                         } else if ( rc == 0 ) {
 504                                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 505                                         ldap_pvt_thread_yield();
 506                                         if ( retries > 0 ) {
 507                                                 retries--;
 508                                         }
 509                                         LDAP_BACK_TV_SET( &tv );
 510                                         goto retry;
 511                                 }
 512                                 rc = LDAP_UNAVAILABLE;
 513
 514                         } else if ( rc == LDAP_RES_EXTENDED ) {
 515                                 struct berval   *data = NULL;
 516
 517                                 rc = ldap_parse_extended_result( ld, res,
 518                                                 NULL, &data, 0 );
 519                                 if ( rc == LDAP_SUCCESS ) {
 520                                         int err;
 521                                         rc = ldap_parse_result( ld, res, &err,
 522                                                 NULL, NULL, NULL, NULL, 1 );
 523                                         if ( rc == LDAP_SUCCESS ) {
 524                                                 rc = err;
 525                                         }
 526                                         res = NULL;
 527
 528                                         /* FIXME: in case a referral
 529                                          * is returned, should we try
 530                                          * using it instead of the
 531                                          * configured URI? */
 532                                         if ( rc == LDAP_SUCCESS ) {
 533                                                 rc = ldap_install_tls( ld );
 534
 535                                         } else if ( rc == LDAP_REFERRAL ) {
 536                                                 rc = LDAP_UNWILLING_TO_PERFORM;
 537                                                 *text = "unwilling to chase referral returned by Start TLS exop";
 538                                         }
 539
 540                                         if ( data ) {
 541                                                 if ( data->bv_val ) {
 542                                                         ber_memfree( data->bv_val );
 543                                                 }
 544                                                 ber_memfree( data );
 545                                         }
 546                                 }
 547
 548                         } else {
 549                                 rc = LDAP_OTHER;
 550                         }
 551
 552                         if ( res != NULL ) {
 553                                 ldap_msgfree( res );
 554                         }
 555                 }
 556 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 557                 /*
 558                  * use synchronous StartTLS
 559                  */
 560                 rc = ldap_start_tls_s( ld, NULL, NULL );
 561 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 562
 563                 /* if StartTLS is requested, only attempt it if the URL
 564                  * is not "ldaps://"; this may occur not only in case
 565                  * of misconfiguration, but also when used in the chain
 566                  * overlay, where the "uri" can be parsed out of a referral */
 567                 switch ( rc ) {
 568                 case LDAP_SUCCESS:
 569                         *is_tls = 1;
 570                         break;
 571
 572                 case LDAP_SERVER_DOWN:
 573                         break;
 574
 575                 default:
 576                         if ( LDAP_BACK_TLS_CRITICAL_F( flags ) ) {
 577                                 *text = "could not start TLS";
 578                                 break;
 579                         }
 580
 581                         /* in case Start TLS is not critical */
 582                         *is_tls = 0;
 583                         rc = LDAP_SUCCESS;
 584                         break;
 585                 }
 586
 587         } else {
 588                 *is_tls = 0;
 589         }
 590
 591         return rc;
 592 }
 593 #endif /* HAVE_TLS */
 594
 595 static int
 596 ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 597 {
 598         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 599         int             version;
 600         LDAP            *ld = NULL;
 601 #ifdef HAVE_TLS
 602         int             is_tls = op->o_conn->c_is_tls;
 603         time_t          lc_time = (time_t)(-1);
 604 #endif /* HAVE_TLS */
 605
 606         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 607         rs->sr_err = ldap_initialize( &ld, li->li_uri );
 608         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 609         if ( rs->sr_err != LDAP_SUCCESS ) {
 610                 goto error_return;
 611         }
 612
 613         /* Set LDAP version. This will always succeed: If the client
 614          * bound with a particular version, then so can we.
 615          */
 616         if ( li->li_version != 0 ) {
 617                 version = li->li_version;
 618
 619         } else if ( op->o_protocol != 0 ) {
 620                 version = op->o_protocol;
 621
 622         } else {
 623                 /* assume it's an internal op; set to LDAPv3 */
 624                 version = LDAP_VERSION3;
 625         }
 626         ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
 627
 628         /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
 629         ldap_set_option( ld, LDAP_OPT_REFERRALS,
 630                 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
 631
 632         if ( li->li_network_timeout > 0 ) {
 633                 struct timeval          tv;
 634
 635                 tv.tv_sec = li->li_network_timeout;
 636                 tv.tv_usec = 0;
 637                 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
 638         }
 639
 640 #ifdef HAVE_TLS
 641         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 642         rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
 643                         li->li_uri, li->li_flags, li->li_nretries, &rs->sr_text );
 644         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 645         if ( rs->sr_err != LDAP_SUCCESS ) {
 646                 ldap_unbind_ext( ld, NULL, NULL );
 647                 rs->sr_text = "Start TLS failed";
 648                 goto error_return;
 649
 650         } else if ( li->li_idle_timeout ) {
 651                 /* only touch when activity actually took place... */
 652                 lc_time = op->o_time;
 653         }
 654 #endif /* HAVE_TLS */
 655
 656         lc->lc_ld = ld;
 657         lc->lc_refcnt = 1;
 658 #ifdef HAVE_TLS
 659         if ( is_tls ) {
 660                 LDAP_BACK_CONN_ISTLS_SET( lc );
 661         } else {
 662                 LDAP_BACK_CONN_ISTLS_CLEAR( lc );
 663         }
 664         if ( lc_time != (time_t)(-1) ) {
 665                 lc->lc_time = lc_time;
 666         }
 667 #endif /* HAVE_TLS */
 668
 669 error_return:;
 670         if ( rs->sr_err != LDAP_SUCCESS ) {
 671                 rs->sr_err = slap_map_api2result( rs );
 672                 if ( sendok & LDAP_BACK_SENDERR ) {
 673                         if ( rs->sr_text == NULL ) {
 674                                 rs->sr_text = "Proxy connection initialization failed";
 675                         }
 676                         send_ldap_result( op, rs );
 677                 }
 678
 679         } else {
 680                 if ( li->li_conn_ttl > 0 ) {
 681                         lc->lc_create_time = op->o_time;
 682                 }
 683         }
 684
 685         return rs->sr_err;
 686 }
 687
 688 static ldapconn_t *
 689 ldap_back_getconn(
 690         Operation               *op,
 691         SlapReply               *rs,
 692         ldap_back_send_t        sendok,
 693         struct berval           *binddn,
 694         struct berval           *bindcred )
 695 {
 696         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 697         ldapconn_t      *lc = NULL,
 698                         lc_curr = { 0 };
 699         int             refcnt = 1,
 700                         lookupconn = !( sendok & LDAP_BACK_BINDING );
 701
 702         /* if the server is quarantined, and
 703          * - the current interval did not expire yet, or
 704          * - no more retries should occur,
 705          * don't return the connection */
 706         if ( li->li_isquarantined ) {
 707                 slap_retry_info_t       *ri = &li->li_quarantine;
 708                 int                     dont_retry = 1;
 709
 710                 if ( li->li_quarantine.ri_interval ) {
 711                         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
 712                         if ( li->li_isquarantined == LDAP_BACK_FQ_YES ) {
 713                                 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
 714                                         || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
 715                                 if ( !dont_retry ) {
 716                                         Debug( LDAP_DEBUG_ANY,
 717                                                 "%s: ldap_back_getconn quarantine "
 718                                                 "retry block #%d try #%d.\n",
 719                                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
 720                                         li->li_isquarantined = LDAP_BACK_FQ_RETRYING;
 721                                 }
 722                         }
 723                         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
 724                 }
 725
 726                 if ( dont_retry ) {
 727                         rs->sr_err = LDAP_UNAVAILABLE;
 728                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
 729                                 rs->sr_text = "Target is quarantined";
 730                                 send_ldap_result( op, rs );
 731                         }
 732                         return NULL;
 733                 }
 734         }
 735
 736         /* Internal searches are privileged and shared. So is root. */
 737         if ( op->o_do_not_cache || be_isroot( op ) ) {
 738                 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
 739                 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
 740                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 741
 742         } else {
 743                 struct berval   tmpbinddn,
 744                                 tmpbindcred,
 745                                 save_o_dn,
 746                                 save_o_ndn;
 747                 int             isproxyauthz;
 748
 749                 /* need cleanup */
 750                 if ( binddn == NULL ) {
 751                         binddn = &tmpbinddn;
 752                 }
 753                 if ( bindcred == NULL ) {
 754                         bindcred = &tmpbindcred;
 755                 }
 756                 if ( op->o_tag == LDAP_REQ_BIND ) {
 757                         save_o_dn = op->o_dn;
 758                         save_o_ndn = op->o_ndn;
 759                         op->o_dn = op->o_req_dn;
 760                         op->o_ndn = op->o_req_ndn;
 761                 }
 762                 isproxyauthz = ldap_back_is_proxy_authz( op, rs, sendok, binddn, bindcred );
 763                 if ( op->o_tag == LDAP_REQ_BIND ) {
 764                         op->o_dn = save_o_dn;
 765                         op->o_ndn = save_o_ndn;
 766                 }
 767                 if ( isproxyauthz == -1 ) {
 768                         return NULL;
 769                 }
 770
 771                 lc_curr.lc_local_ndn = op->o_ndn;
 772                 /* Explicit binds must not be shared;
 773                  * however, explicit binds are piped in a special connection
 774                  * when idassert is to occur with "override" set */
 775                 if ( op->o_tag == LDAP_REQ_BIND && !isproxyauthz ) {
 776                         lc_curr.lc_conn = op->o_conn;
 777
 778                 } else {
 779                         if ( isproxyauthz && !( sendok & LDAP_BACK_BINDING ) ) {
 780                                 lc_curr.lc_local_ndn = *binddn;
 781                                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 782                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 783
 784                         } else if ( isproxyauthz && ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) {
 785                                 lc_curr.lc_local_ndn = slap_empty_bv;
 786                                 LDAP_BACK_PCONN_BIND_SET( &lc_curr, op );
 787                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 788                                 lookupconn = 1;
 789
 790                         } else if ( SLAP_IS_AUTHZ_BACKEND( op ) ) {
 791                                 lc_curr.lc_conn = op->o_conn;
 792
 793                         } else {
 794                                 LDAP_BACK_PCONN_ANON_SET( &lc_curr, op );
 795                         }
 796                 }
 797         }
 798
 799         /* Explicit Bind requests always get their own conn */
 800         if ( lookupconn ) {
 801 retry_lock:
 802                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 803                 if ( LDAP_BACK_PCONN_ISPRIV( &lc_curr ) ) {
 804                         /* lookup a conn that's not binding */
 805                         LDAP_TAILQ_FOREACH( lc,
 806                                 &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv,
 807                                 lc_q )
 808                         {
 809                                 if ( !LDAP_BACK_CONN_BINDING( lc ) && lc->lc_refcnt == 0 ) {
 810                                         break;
 811                                 }
 812                         }
 813
 814                         if ( lc != NULL ) {
 815                                 if ( lc != LDAP_TAILQ_LAST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 816                                         ldapconn_t, lc_q ) )
 817                                 {
 818                                         LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 819                                                 lc, lc_q );
 820                                         LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
 821                                         LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 822                                                 lc, lc_q );
 823                                 }
 824
 825                         } else if ( !LDAP_BACK_USE_TEMPORARIES( li )
 826                                 && li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_num == li->li_conn_priv_max )
 827                         {
 828                                 lc = LDAP_TAILQ_FIRST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv );
 829                         }
 830
 831                 } else {
 832
 833                         /* Searches for a ldapconn in the avl tree */
 834                         lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 835                                         (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 836                 }
 837
 838                 if ( lc != NULL ) {
 839                         /* Don't reuse connections while they're still binding */
 840                         if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 841                                 if ( !LDAP_BACK_USE_TEMPORARIES( li ) ) {
 842                                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 843
 844                                         ldap_pvt_thread_yield();
 845                                         goto retry_lock;
 846                                 }
 847                                 lc = NULL;
 848                         }
 849
 850                         if ( lc != NULL ) {
 851                                 if ( op->o_tag == LDAP_REQ_BIND ) {
 852                                         /* right now, this is the only possible case */
 853                                         assert( ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) );
 854                                         LDAP_BACK_CONN_BINDING_SET( lc );
 855                                 }
 856
 857                                 refcnt = ++lc->lc_refcnt;
 858                         }
 859                 }
 860                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 861         }
 862
 863         /* Looks like we didn't get a bind. Open a new session... */
 864         if ( lc == NULL ) {
 865                 lc = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
 866                 lc->lc_flags = li->li_flags;
 867                 lc->lc_lcflags = lc_curr.lc_lcflags;
 868                 if ( ldap_back_prepare_conn( lc, op, rs, sendok ) != LDAP_SUCCESS ) {
 869                         ch_free( lc );
 870                         return NULL;
 871                 }
 872
 873                 if ( sendok & LDAP_BACK_BINDING ) {
 874                         LDAP_BACK_CONN_BINDING_SET( lc );
 875                 }
 876
 877                 lc->lc_conn = lc_curr.lc_conn;
 878                 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
 879
 880                 /*
 881                  * the rationale is: connections as the rootdn are privileged,
 882                  * so acl_authcDN is to be used; however, in some cases
 883                  * one already configured identity assertion with a highly
 884                  * privileged idassert_authcDN, so if acl_authcDN is NULL
 885                  * and idassert_authcDN is not, use the second instead.
 886                  *
 887                  * might change in the future, because it's preferable
 888                  * to make clear what identity is being used, since
 889                  * the only drawback is that one risks to configure
 890                  * the same identity twice...
 891                  */
 892                 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
 893                         if ( BER_BVISNULL( &li->li_acl_authcDN ) && !BER_BVISNULL( &li->li_idassert_authcDN ) ) {
 894                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
 895                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
 896
 897                         } else {
 898                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
 899                                 ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
 900                         }
 901                         LDAP_BACK_CONN_ISPRIV_SET( lc );
 902
 903                 } else if ( LDAP_BACK_CONN_ISIDASSERT( &lc_curr ) ) {
 904                         if ( !LDAP_BACK_PCONN_ISBIND( &lc_curr ) ) {
 905                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
 906                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
 907                         }
 908                         LDAP_BACK_CONN_ISIDASSERT_SET( lc );
 909
 910                 } else {
 911                         BER_BVZERO( &lc->lc_cred );
 912                         BER_BVZERO( &lc->lc_bound_ndn );
 913                         if ( !BER_BVISEMPTY( &op->o_ndn )
 914                                 && SLAP_IS_AUTHZ_BACKEND( op ) )
 915                         {
 916                                 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
 917                         }
 918                 }
 919
 920 #ifdef HAVE_TLS
 921                 /* if start TLS failed but it was not mandatory,
 922                  * check if the non-TLS connection was already
 923                  * in cache; in case, destroy the newly created
 924                  * connection and use the existing one */
 925                 if ( LDAP_BACK_PCONN_ISTLS( lc )
 926                                 && !ldap_tls_inplace( lc->lc_ld ) )
 927                 {
 928                         ldapconn_t      *tmplc = NULL;
 929                         int             idx = LDAP_BACK_CONN2PRIV( &lc_curr ) - 1;
 930
 931                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 932                         LDAP_TAILQ_FOREACH( tmplc,
 933                                 &li->li_conn_priv[ idx ].lic_priv,
 934                                 lc_q )
 935                         {
 936                                 if ( !LDAP_BACK_CONN_BINDING( tmplc ) ) {
 937                                         break;
 938                                 }
 939                         }
 940
 941                         if ( tmplc != NULL ) {
 942                                 refcnt = ++tmplc->lc_refcnt;
 943                                 ldap_back_conn_free( lc );
 944                                 lc = tmplc;
 945                         }
 946                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 947
 948                         if ( tmplc != NULL ) {
 949                                 goto done;
 950                         }
 951                 }
 952 #endif /* HAVE_TLS */
 953
 954                 /* Inserts the newly created ldapconn in the avl tree */
 955                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 956
 957                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 958
 959                 assert( lc->lc_refcnt == 1 );
 960
 961 #if LDAP_BACK_PRINT_CONNTREE > 0
 962                 ldap_back_print_conntree( li, ">>> ldap_back_getconn(insert)" );
 963 #endif /* LDAP_BACK_PRINT_CONNTREE */
 964
 965                 if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
 966                         if ( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num < li->li_conn_priv_max ) {
 967                                 LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
 968                                 li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num++;
 969                                 LDAP_BACK_CONN_CACHED_SET( lc );
 970
 971                         } else {
 972                                 LDAP_BACK_CONN_TAINTED_SET( lc );
 973                         }
 974                         rs->sr_err = 0;
 975
 976                 } else {
 977                         rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 978                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 979                         LDAP_BACK_CONN_CACHED_SET( lc );
 980                 }
 981
 982 #if LDAP_BACK_PRINT_CONNTREE > 0
 983                 ldap_back_print_conntree( li, "<<< ldap_back_getconn(insert)" );
 984 #endif /* LDAP_BACK_PRINT_CONNTREE */
 985
 986                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 987
 988                 if ( StatslogTest( LDAP_DEBUG_TRACE ) ) {
 989                         char    buf[ SLAP_TEXT_BUFLEN ];
 990
 991                         snprintf( buf, sizeof( buf ),
 992                                 "lc=%p inserted refcnt=%u rc=%d",
 993                                 (void *)lc, refcnt, rs->sr_err );
 994
 995                         Debug( LDAP_DEBUG_TRACE,
 996                                 "=>ldap_back_getconn: %s: %s\n",
 997                                 op->o_log_prefix, buf, 0 );
 998                 }
 999
1000                 if ( !LDAP_BACK_PCONN_ISPRIV( lc ) ) {
1001                         /* Err could be -1 in case a duplicate ldapconn is inserted */
1002                         switch ( rs->sr_err ) {
1003                         case 0:
1004                                 break;
1005
1006                         case -1:
1007                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1008                                 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( li ) ) {
1009                                         /* duplicate: free and try to get the newly created one */
1010                                         ldap_back_conn_free( lc );
1011                                         lc = NULL;
1012                                         goto retry_lock;
1013                                 }
1014
1015                                 /* taint connection, so that it'll be freed when released */
1016                                 LDAP_BACK_CONN_TAINTED_SET( lc );
1017                                 break;
1018
1019                         default:
1020                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1021                                 ldap_back_conn_free( lc );
1022                                 rs->sr_err = LDAP_OTHER;
1023                                 rs->sr_text = "Proxy bind collision";
1024                                 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1025                                         send_ldap_result( op, rs );
1026                                 }
1027                                 return NULL;
1028                         }
1029                 }
1030
1031         } else {
1032                 int     expiring = 0;
1033
1034                 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
1035                         || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
1036                 {
1037                         expiring = 1;
1038
1039                         /* let it be used, but taint/delete it so that
1040                          * no-one else can look it up any further */
1041                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1042
1043 #if LDAP_BACK_PRINT_CONNTREE > 0
1044                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1045 #endif /* LDAP_BACK_PRINT_CONNTREE */
1046
1047                         (void)ldap_back_conn_delete( li, lc );
1048                         LDAP_BACK_CONN_TAINTED_SET( lc );
1049
1050 #if LDAP_BACK_PRINT_CONNTREE > 0
1051                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1052 #endif /* LDAP_BACK_PRINT_CONNTREE */
1053
1054                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1055                 }
1056
1057                 if ( StatslogTest( LDAP_DEBUG_TRACE ) ) {
1058                         char    buf[ SLAP_TEXT_BUFLEN ];
1059
1060                         snprintf( buf, sizeof( buf ),
1061                                 "conn %p fetched refcnt=%u%s",
1062                                 (void *)lc, refcnt,
1063                                 expiring ? " expiring" : "" );
1064                         Debug( LDAP_DEBUG_TRACE,
1065                                 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
1066                 }
1067         }
1068
1069 #ifdef HAVE_TLS
1070 done:;
1071 #endif /* HAVE_TLS */
1072
1073         return lc;
1074 }
1075
1076 void
1077 ldap_back_release_conn_lock(
1078         ldapinfo_t              *li,
1079         ldapconn_t              **lcp,
1080         int                     dolock )
1081 {
1082
1083         ldapconn_t      *lc = *lcp;
1084
1085         if ( dolock ) {
1086                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1087         }
1088         assert( lc->lc_refcnt > 0 );
1089         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1090         lc->lc_refcnt--;
1091         if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
1092                 ldap_back_freeconn( li, lc, 0 );
1093                 *lcp = NULL;
1094         }
1095         if ( dolock ) {
1096                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1097         }
1098 }
1099
1100 void
1101 ldap_back_quarantine(
1102         Operation       *op,
1103         SlapReply       *rs )
1104 {
1105         ldapinfo_t              *li = (ldapinfo_t *)op->o_bd->be_private;
1106
1107         slap_retry_info_t       *ri = &li->li_quarantine;
1108
1109         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
1110
1111         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1112                 time_t          new_last = slap_get_time();
1113
1114                 switch ( li->li_isquarantined ) {
1115                 case LDAP_BACK_FQ_NO:
1116                         if ( ri->ri_last == new_last ) {
1117                                 goto done;
1118                         }
1119
1120                         Debug( LDAP_DEBUG_ANY,
1121                                 "%s: ldap_back_quarantine enter.\n",
1122                                 op->o_log_prefix, 0, 0 );
1123
1124                         ri->ri_idx = 0;
1125                         ri->ri_count = 0;
1126                         break;
1127
1128                 case LDAP_BACK_FQ_RETRYING:
1129                         Debug( LDAP_DEBUG_ANY,
1130                                 "%s: ldap_back_quarantine block #%d try #%d failed.\n",
1131                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
1132
1133                         ++ri->ri_count;
1134                         if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1135                                 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1136                         {
1137                                 ri->ri_count = 0;
1138                                 ++ri->ri_idx;
1139                         }
1140                         break;
1141
1142                 default:
1143                         break;
1144                 }
1145
1146                 li->li_isquarantined = LDAP_BACK_FQ_YES;
1147                 ri->ri_last = new_last;
1148
1149         } else if ( li->li_isquarantined != LDAP_BACK_FQ_NO ) {
1150                 if ( ri->ri_last == slap_get_time() ) {
1151                         goto done;
1152                 }
1153
1154                 Debug( LDAP_DEBUG_ANY,
1155                         "%s: ldap_back_quarantine exit (%d) err=%d.\n",
1156                         op->o_log_prefix, li->li_isquarantined, rs->sr_err );
1157
1158                 if ( li->li_quarantine_f ) {
1159                         (void)li->li_quarantine_f( li, li->li_quarantine_p );
1160                 }
1161
1162                 ri->ri_count = 0;
1163                 ri->ri_idx = 0;
1164                 li->li_isquarantined = LDAP_BACK_FQ_NO;
1165         }
1166
1167 done:;
1168         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
1169 }
1170
1171 /*
1172  * ldap_back_dobind_int
1173  *
1174  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1175  */
1176 static int
1177 ldap_back_dobind_int(
1178         ldapconn_t              **lcp,
1179         Operation               *op,
1180         SlapReply               *rs,
1181         ldap_back_send_t        sendok,
1182         int                     retries,
1183         int                     dolock )
1184 {
1185         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1186
1187         ldapconn_t      *lc;
1188         struct berval   binddn = slap_empty_bv,
1189                         bindcred = slap_empty_bv;
1190
1191         int             rc = 0,
1192                         isbound,
1193                         binding = 0;
1194         ber_int_t       msgid;
1195
1196         assert( lcp != NULL );
1197         assert( retries >= 0 );
1198
1199         if ( sendok & LDAP_BACK_GETCONN ) {
1200                 assert( *lcp == NULL );
1201
1202                 lc = ldap_back_getconn( op, rs, sendok, &binddn, &bindcred );
1203                 if ( lc == NULL ) {
1204                         return 0;
1205                 }
1206                 *lcp = lc;
1207
1208         } else {
1209                 lc = *lcp;
1210         }
1211
1212         assert( lc != NULL );
1213
1214 retry_lock:;
1215         if ( dolock ) {
1216                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1217         }
1218
1219         if ( binding == 0 ) {
1220                 /* check if already bound */
1221                 rc = isbound = LDAP_BACK_CONN_ISBOUND( lc );
1222                 if ( isbound ) {
1223                         if ( dolock ) {
1224                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1225                         }
1226                         return rc;
1227                 }
1228
1229                 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
1230                         /* if someone else is about to bind it, give up and retry */
1231                         if ( dolock ) {
1232                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1233                         }
1234                         ldap_pvt_thread_yield();
1235                         goto retry_lock;
1236
1237                 } else {
1238                         /* otherwise this thread will bind it */
1239                         LDAP_BACK_CONN_BINDING_SET( lc );
1240                         binding = 1;
1241                 }
1242         }
1243
1244         if ( dolock ) {
1245                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1246         }
1247
1248         /*
1249          * FIXME: we need to let clients use proxyAuthz
1250          * otherwise we cannot do symmetric pools of servers;
1251          * we have to live with the fact that a user can
1252          * authorize itself as any ID that is allowed
1253          * by the authzTo directive of the "proxyauthzdn".
1254          */
1255         /*
1256          * NOTE: current Proxy Authorization specification
1257          * and implementation do not allow proxy authorization
1258          * control to be provided with Bind requests
1259          */
1260         /*
1261          * if no bind took place yet, but the connection is bound
1262          * and the "idassert-authcDN" (or other ID) is set,
1263          * then bind as the asserting identity and explicitly
1264          * add the proxyAuthz control to every operation with the
1265          * dn bound to the connection as control value.
1266          * This is done also if this is the authrizing backend,
1267          * but the "override" flag is given to idassert.
1268          * It allows to use SASL bind and yet proxyAuthz users
1269          */
1270         if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
1271                 if ( BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &bindcred ) ) {
1272                         /* if we got here, it shouldn't return result */
1273                         rc = ldap_back_is_proxy_authz( op, rs,
1274                                 LDAP_BACK_DONTSEND, &binddn, &bindcred );
1275                         assert( rc == 1 );
1276                 }
1277                 rc = ldap_back_proxy_authz_bind( lc, op, rs, sendok, &binddn, &bindcred );
1278                 goto done;
1279         }
1280
1281 #ifdef HAVE_CYRUS_SASL
1282         if ( LDAP_BACK_CONN_ISPRIV( lc )
1283                 && li->li_acl_authmethod == LDAP_AUTH_SASL )
1284         {
1285                 void            *defaults = NULL;
1286
1287                 if ( li->li_acl_secprops != NULL ) {
1288                         rc = ldap_set_option( lc->lc_ld,
1289                                 LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops );
1290
1291                         if ( rc != LDAP_OPT_SUCCESS ) {
1292                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
1293                                         "(SECPROPS,\"%s\") failed!\n",
1294                                         li->li_acl_secprops, 0, 0 );
1295                                 goto done;
1296                         }
1297                 }
1298
1299                 defaults = lutil_sasl_defaults( lc->lc_ld,
1300                                 li->li_acl_sasl_mech.bv_val,
1301                                 li->li_acl_sasl_realm.bv_val,
1302                                 li->li_acl_authcID.bv_val,
1303                                 li->li_acl_passwd.bv_val,
1304                                 NULL );
1305
1306                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
1307                                 li->li_acl_authcDN.bv_val,
1308                                 li->li_acl_sasl_mech.bv_val, NULL, NULL,
1309                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1310                                 defaults );
1311
1312                 lutil_sasl_freedefs( defaults );
1313
1314                 rs->sr_err = slap_map_api2result( rs );
1315                 if ( rs->sr_err != LDAP_SUCCESS ) {
1316                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1317                         if ( sendok & LDAP_BACK_SENDERR ) {
1318                                 send_ldap_result( op, rs );
1319                         }
1320
1321                 } else {
1322                         LDAP_BACK_CONN_ISBOUND_SET( lc );
1323                 }
1324
1325                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1326                         ldap_back_quarantine( op, rs );
1327                 }
1328
1329                 goto done;
1330         }
1331 #endif /* HAVE_CYRUS_SASL */
1332
1333 retry:;
1334         rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1335                         BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val,
1336                         LDAP_SASL_SIMPLE, &lc->lc_cred,
1337                         NULL, NULL, &msgid );
1338
1339         if ( rs->sr_err == LDAP_SERVER_DOWN ) {
1340                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
1341                         if ( dolock ) {
1342                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1343                         }
1344
1345                         assert( lc->lc_refcnt > 0 );
1346                         if ( lc->lc_refcnt == 1 ) {
1347                                 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1348                                 lc->lc_ld = NULL;
1349
1350                                 /* lc here must be the regular lc, reset and ready for init */
1351                                 rs->sr_err = ldap_back_prepare_conn( lc, op, rs, sendok );
1352                                 if ( rs->sr_err != LDAP_SUCCESS ) {
1353                                         sendok &= ~LDAP_BACK_SENDERR;
1354                                         lc->lc_refcnt = 0;
1355                                 }
1356                         }
1357
1358                         if ( dolock ) {
1359                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1360                         }
1361
1362                         if ( rs->sr_err == LDAP_SUCCESS ) {
1363                                 if ( retries > 0 ) {
1364                                         retries--;
1365                                 }
1366                                 goto retry;
1367                         }
1368                 }
1369
1370                 assert( lc->lc_refcnt == 1 );
1371                 lc->lc_refcnt = 0;
1372                 ldap_back_freeconn( li, lc, dolock );
1373                 *lcp = NULL;
1374                 rs->sr_err = slap_map_api2result( rs );
1375
1376                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1377                         ldap_back_quarantine( op, rs );
1378                 }
1379
1380                 if ( rs->sr_err != LDAP_SUCCESS &&
1381                         ( sendok & LDAP_BACK_SENDERR ) )
1382                 {
1383                         rs->sr_text = "Internal proxy bind failure";
1384                         send_ldap_result( op, rs );
1385                 }
1386
1387                 return 0;
1388         }
1389
1390         rc = ldap_back_op_result( lc, op, rs, msgid,
1391                 -1, ( sendok | LDAP_BACK_BINDING ) );
1392         if ( rc == LDAP_SUCCESS ) {
1393                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1394         }
1395
1396 done:;
1397         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1398         rc = LDAP_BACK_CONN_ISBOUND( lc );
1399         if ( !rc ) {
1400                 ldap_back_release_conn_lock( li, lcp, dolock );
1401
1402         } else if ( LDAP_BACK_SAVECRED( li ) ) {
1403                 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
1404         }
1405
1406         return rc;
1407 }
1408
1409 /*
1410  * ldap_back_dobind
1411  *
1412  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1413  */
1414 int
1415 ldap_back_dobind( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1416 {
1417         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1418
1419         return ldap_back_dobind_int( lcp, op, rs,
1420                 ( sendok | LDAP_BACK_GETCONN ), li->li_nretries, 1 );
1421 }
1422
1423 /*
1424  * ldap_back_default_rebind
1425  *
1426  * This is a callback used for chasing referrals using the same
1427  * credentials as the original user on this session.
1428  */
1429 int
1430 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
1431         ber_int_t msgid, void *params )
1432 {
1433         ldapconn_t      *lc = (ldapconn_t *)params;
1434
1435 #ifdef HAVE_TLS
1436         /* ... otherwise we couldn't get here */
1437         assert( lc != NULL );
1438
1439         if ( !ldap_tls_inplace( ld ) ) {
1440                 int             is_tls = LDAP_BACK_CONN_ISTLS( lc ),
1441                                 rc;
1442                 const char      *text = NULL;
1443
1444                 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
1445                         LDAP_BACK_RETRY_DEFAULT, &text );
1446                 if ( rc != LDAP_SUCCESS ) {
1447                         return rc;
1448                 }
1449         }
1450 #endif /* HAVE_TLS */
1451
1452         /* FIXME: add checks on the URL/identity? */
1453
1454         return ldap_sasl_bind_s( ld,
1455                         BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val,
1456                         LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
1457 }
1458
1459 int
1460 ldap_back_cancel(
1461                 ldapconn_t              *lc,
1462                 Operation               *op,
1463                 SlapReply               *rs,
1464                 ber_int_t               msgid,
1465                 ldap_back_send_t        sendok )
1466 {
1467         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1468
1469         /* default behavior */
1470         if ( LDAP_BACK_ABANDON( li ) ) {
1471                 return ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
1472         }
1473
1474         if ( LDAP_BACK_CANCEL( li ) ) {
1475                 /* FIXME: asynchronous? */
1476                 return ldap_cancel_s( lc->lc_ld, msgid, NULL, NULL );
1477         }
1478
1479         assert( 0 );
1480
1481         return LDAP_OTHER;
1482 }
1483
1484 int
1485 ldap_back_op_result(
1486                 ldapconn_t              *lc,
1487                 Operation               *op,
1488                 SlapReply               *rs,
1489                 ber_int_t               msgid,
1490                 time_t                  timeout,
1491                 ldap_back_send_t        sendok )
1492 {
1493         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1494
1495         char            *match = NULL;
1496         char            *text = NULL;
1497         char            **refs = NULL;
1498         LDAPControl     **ctrls = NULL;
1499
1500 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
1501
1502         rs->sr_text = NULL;
1503         rs->sr_matched = NULL;
1504         rs->sr_ref = NULL;
1505         rs->sr_ctrls = NULL;
1506
1507         /* if the error recorded in the reply corresponds
1508          * to a successful state, get the error from the
1509          * remote server response */
1510         if ( ERR_OK( rs->sr_err ) ) {
1511                 int             rc;
1512                 struct timeval  tv;
1513                 LDAPMessage     *res = NULL;
1514                 time_t          stoptime = (time_t)(-1);
1515                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
1516                                         LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
1517                 const char      *timeout_text = "Operation timed out";
1518
1519                 /* if timeout is not specified, compute and use
1520                  * the one specific to the ongoing operation */
1521                 if ( timeout == (time_t)(-1) ) {
1522                         slap_op_t       opidx = slap_req2op( op->o_tag );
1523
1524                         if ( opidx == SLAP_OP_SEARCH ) {
1525                                 if ( op->ors_tlimit <= 0 ) {
1526                                         timeout = 0;
1527
1528                                 } else {
1529                                         timeout = op->ors_tlimit;
1530                                         timeout_err = LDAP_TIMELIMIT_EXCEEDED;
1531                                         timeout_text = NULL;
1532                                 }
1533
1534                         } else {
1535                                 timeout = li->li_timeout[ opidx ];
1536                         }
1537                 }
1538
1539                 /* better than nothing :) */
1540                 if ( timeout == 0 ) {
1541                         if ( li->li_idle_timeout ) {
1542                                 timeout = li->li_idle_timeout;
1543
1544                         } else if ( li->li_conn_ttl ) {
1545                                 timeout = li->li_conn_ttl;
1546                         }
1547                 }
1548
1549                 if ( timeout ) {
1550                         stoptime = op->o_time + timeout;
1551                 }
1552
1553                 LDAP_BACK_TV_SET( &tv );
1554
1555 retry:;
1556                 /* if result parsing fails, note the failure reason */
1557                 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1558                 switch ( rc ) {
1559                 case 0:
1560                         if ( timeout && slap_get_time() > stoptime ) {
1561                                 if ( sendok & LDAP_BACK_BINDING ) {
1562                                         ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1563                                         lc->lc_ld = NULL;
1564
1565                                         /* let it be used, but taint/delete it so that
1566                                          * no-one else can look it up any further */
1567                                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1568
1569 #if LDAP_BACK_PRINT_CONNTREE > 0
1570                                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1571 #endif /* LDAP_BACK_PRINT_CONNTREE */
1572
1573                                         (void)ldap_back_conn_delete( li, lc );
1574                                         LDAP_BACK_CONN_TAINTED_SET( lc );
1575
1576 #if LDAP_BACK_PRINT_CONNTREE > 0
1577                                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1578 #endif /* LDAP_BACK_PRINT_CONNTREE */
1579                                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1580
1581                                 } else {
1582                                         (void)ldap_back_cancel( lc, op, rs, msgid, sendok );
1583                                 }
1584                                 rs->sr_err = timeout_err;
1585                                 rs->sr_text = timeout_text;
1586                                 break;
1587                         }
1588
1589                         /* timeout == 0 */
1590                         LDAP_BACK_TV_SET( &tv );
1591                         ldap_pvt_thread_yield();
1592                         goto retry;
1593
1594                 case -1:
1595                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
1596                                         &rs->sr_err );
1597                         break;
1598
1599
1600                 /* otherwise get the result; if it is not
1601                  * LDAP_SUCCESS, record it in the reply
1602                  * structure (this includes
1603                  * LDAP_COMPARE_{TRUE|FALSE}) */
1604                 default:
1605                         /* only touch when activity actually took place... */
1606                         if ( li->li_idle_timeout && lc ) {
1607                                 lc->lc_time = op->o_time;
1608                         }
1609
1610                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
1611                                         &match, &text, &refs, &ctrls, 1 );
1612                         rs->sr_text = text;
1613                         if ( rc != LDAP_SUCCESS ) {
1614                                 rs->sr_err = rc;
1615                         }
1616
1617                         /* RFC 4511: referrals can only appear
1618                          * if result code is LDAP_REFERRAL */
1619                         if ( refs != NULL
1620                                 && refs[ 0 ] != NULL
1621                                 && refs[ 0 ][ 0 ] != '\0' )
1622                         {
1623                                 if ( rs->sr_err != LDAP_REFERRAL ) {
1624                                         Debug( LDAP_DEBUG_ANY,
1625                                                 "%s ldap_back_op_result: "
1626                                                 "got referrals with err=%d\n",
1627                                                 op->o_log_prefix,
1628                                                 rs->sr_err, 0 );
1629
1630                                 } else {
1631                                         int     i;
1632
1633                                         for ( i = 0; refs[ i ] != NULL; i++ )
1634                                                 /* count */ ;
1635                                         rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1636                                                 op->o_tmpmemctx );
1637                                         for ( i = 0; refs[ i ] != NULL; i++ ) {
1638                                                 ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1639                                         }
1640                                         BER_BVZERO( &rs->sr_ref[ i ] );
1641                                 }
1642
1643                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
1644                                 Debug( LDAP_DEBUG_ANY,
1645                                         "%s ldap_back_op_result: "
1646                                         "got err=%d with null "
1647                                         "or empty referrals\n",
1648                                         op->o_log_prefix,
1649                                         rs->sr_err, 0 );
1650
1651                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1652                         }
1653
1654                         if ( ctrls != NULL ) {
1655                                 rs->sr_ctrls = ctrls;
1656                         }
1657                 }
1658         }
1659
1660         /* if the error in the reply structure is not
1661          * LDAP_SUCCESS, try to map it from client
1662          * to server error */
1663         if ( !ERR_OK( rs->sr_err ) ) {
1664                 rs->sr_err = slap_map_api2result( rs );
1665
1666                 /* internal ops ( op->o_conn == NULL )
1667                  * must not reply to client */
1668                 if ( op->o_conn && !op->o_do_not_cache && match ) {
1669
1670                         /* record the (massaged) matched
1671                          * DN into the reply structure */
1672                         rs->sr_matched = match;
1673                 }
1674         }
1675
1676         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1677                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1678                         if ( LDAP_BACK_QUARANTINE( li ) ) {
1679                                 ldap_back_quarantine( op, rs );
1680                         }
1681                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1682                                 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
1683                                 send_ldap_result( op, rs );
1684                         }
1685                 }
1686
1687         } else if ( op->o_conn &&
1688                 ( ( ( sendok & LDAP_BACK_SENDOK ) && ERR_OK( rs->sr_err ) )
1689                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1690         {
1691                 send_ldap_result( op, rs );
1692         }
1693
1694         if ( match ) {
1695                 if ( rs->sr_matched != match ) {
1696                         free( (char *)rs->sr_matched );
1697                 }
1698                 rs->sr_matched = NULL;
1699                 ldap_memfree( match );
1700         }
1701
1702         if ( text ) {
1703                 ldap_memfree( text );
1704         }
1705         rs->sr_text = NULL;
1706
1707         if ( rs->sr_ref ) {
1708                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1709                 rs->sr_ref = NULL;
1710         }
1711
1712         if ( refs ) {
1713                 ber_memvfree( (void **)refs );
1714         }
1715
1716         if ( ctrls ) {
1717                 assert( rs->sr_ctrls != NULL );
1718                 ldap_controls_free( ctrls );
1719                 rs->sr_ctrls = NULL;
1720         }
1721
1722         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1723 }
1724
1725 /* return true if bound, false if failed */
1726 int
1727 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1728 {
1729         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1730         int             rc = 0;
1731
1732         assert( lcp != NULL );
1733         assert( *lcp != NULL );
1734
1735         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1736
1737         if ( (*lcp)->lc_refcnt == 1 ) {
1738                 int binding = LDAP_BACK_CONN_BINDING( *lcp );
1739
1740                 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1741                 Debug( LDAP_DEBUG_ANY,
1742                         "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
1743                         op->o_log_prefix, li->li_uri,
1744                         BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
1745                                 "" : (*lcp)->lc_bound_ndn.bv_val );
1746                 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1747
1748                 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
1749                 (*lcp)->lc_ld = NULL;
1750                 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
1751
1752                 /* lc here must be the regular lc, reset and ready for init */
1753                 rc = ldap_back_prepare_conn( *lcp, op, rs, sendok );
1754                 if ( rc != LDAP_SUCCESS ) {
1755                         /* freeit, because lc_refcnt == 1 */
1756                         (*lcp)->lc_refcnt = 0;
1757                         (void)ldap_back_freeconn( li, *lcp, 0 );
1758                         *lcp = NULL;
1759                         rc = 0;
1760
1761                 } else if ( ( sendok & LDAP_BACK_BINDING ) ) {
1762                         if ( binding ) {
1763                                 LDAP_BACK_CONN_BINDING_SET( *lcp );
1764                         }
1765                         rc = 1;
1766
1767                 } else {
1768                         rc = ldap_back_dobind_int( lcp, op, rs, sendok, 0, 0 );
1769                         if ( rc == 0 && *lcp != NULL ) {
1770                                 /* freeit, because lc_refcnt == 1 */
1771                                 (*lcp)->lc_refcnt = 0;
1772                                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
1773                                 (void)ldap_back_freeconn( li, *lcp, 0 );
1774                                 *lcp = NULL;
1775                         }
1776                 }
1777
1778         } else {
1779                 Debug( LDAP_DEBUG_TRACE,
1780                         "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
1781                         (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
1782
1783                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
1784                 ldap_back_release_conn_lock( li, lcp, 0 );
1785                 assert( *lcp == NULL );
1786
1787                 if ( sendok & LDAP_BACK_SENDERR ) {
1788                         rs->sr_err = LDAP_UNAVAILABLE;
1789                         rs->sr_text = "Unable to retry";
1790                         send_ldap_result( op, rs );
1791                 }
1792         }
1793
1794         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1795
1796         return rc;
1797 }
1798
1799 static int
1800 ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
1801         struct berval *binddn, struct berval *bindcred )
1802 {
1803         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1804         struct berval   ndn;
1805         int             dobind = 0;
1806
1807         if ( op->o_conn == NULL || op->o_do_not_cache ) {
1808                 goto done;
1809         }
1810
1811         /* don't proxyAuthz if protocol is not LDAPv3 */
1812         switch ( li->li_version ) {
1813         case LDAP_VERSION3:
1814                 break;
1815
1816         case 0:
1817                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1818                         break;
1819                 }
1820                 /* fall thru */
1821
1822         default:
1823                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1824                 if ( sendok & LDAP_BACK_SENDERR ) {
1825                         send_ldap_result( op, rs );
1826                         dobind = -1;
1827                 }
1828                 goto done;
1829         }
1830
1831         /* safe default */
1832         *binddn = slap_empty_bv;
1833         *bindcred = slap_empty_bv;
1834
1835         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1836                 ndn = op->o_conn->c_ndn;
1837
1838         } else {
1839                 ndn = op->o_ndn;
1840         }
1841
1842         switch ( li->li_idassert_mode ) {
1843         case LDAP_BACK_IDASSERT_LEGACY:
1844                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1845                         if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
1846                         {
1847                                 *binddn = li->li_idassert_authcDN;
1848                                 *bindcred = li->li_idassert_passwd;
1849                                 dobind = 1;
1850                         }
1851                 }
1852                 break;
1853
1854         default:
1855                 /* NOTE: rootdn can always idassert */
1856                 if ( BER_BVISNULL( &ndn )
1857                         && li->li_idassert_authz == NULL
1858                         && !( li->li_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1859                 {
1860                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1861                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1862                                 if ( sendok & LDAP_BACK_SENDERR ) {
1863                                         send_ldap_result( op, rs );
1864                                         dobind = -1;
1865                                 }
1866
1867                         } else {
1868                                 rs->sr_err = LDAP_SUCCESS;
1869                                 *binddn = slap_empty_bv;
1870                                 *bindcred = slap_empty_bv;
1871                                 break;
1872                         }
1873
1874                         goto done;
1875
1876                 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1877                         struct berval authcDN;
1878
1879                         if ( BER_BVISNULL( &ndn ) ) {
1880                                 authcDN = slap_empty_bv;
1881
1882                         } else {
1883                                 authcDN = ndn;
1884                         }
1885                         rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
1886                                         &authcDN, &authcDN );
1887                         if ( rs->sr_err != LDAP_SUCCESS ) {
1888                                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1889                                         if ( sendok & LDAP_BACK_SENDERR ) {
1890                                                 send_ldap_result( op, rs );
1891                                                 dobind = -1;
1892                                         }
1893
1894                                 } else {
1895                                         rs->sr_err = LDAP_SUCCESS;
1896                                         *binddn = slap_empty_bv;
1897                                         *bindcred = slap_empty_bv;
1898                                         break;
1899                                 }
1900
1901                                 goto done;
1902                         }
1903                 }
1904
1905                 *binddn = li->li_idassert_authcDN;
1906                 *bindcred = li->li_idassert_passwd;
1907                 dobind = 1;
1908                 break;
1909         }
1910
1911 done:;
1912         return dobind;
1913 }
1914
1915 static int
1916 ldap_back_proxy_authz_bind(
1917         ldapconn_t              *lc,
1918         Operation               *op,
1919         SlapReply               *rs,
1920         ldap_back_send_t        sendok,
1921         struct berval           *binddn,
1922         struct berval           *bindcred )
1923 {
1924         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1925         struct berval   ndn;
1926         int             msgid;
1927         int             rc;
1928
1929         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1930                 ndn = op->o_conn->c_ndn;
1931
1932         } else {
1933                 ndn = op->o_ndn;
1934         }
1935
1936         if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1937 #ifdef HAVE_CYRUS_SASL
1938                 void            *defaults = NULL;
1939                 struct berval   authzID = BER_BVNULL;
1940                 int             freeauthz = 0;
1941
1942                 /* if SASL supports native authz, prepare for it */
1943                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1944                                 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1945                 {
1946                         switch ( li->li_idassert_mode ) {
1947                         case LDAP_BACK_IDASSERT_OTHERID:
1948                         case LDAP_BACK_IDASSERT_OTHERDN:
1949                                 authzID = li->li_idassert_authzID;
1950                                 break;
1951
1952                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1953                                 BER_BVSTR( &authzID, "dn:" );
1954                                 break;
1955
1956                         case LDAP_BACK_IDASSERT_SELF:
1957                                 if ( BER_BVISNULL( &ndn ) ) {
1958                                         /* connection is not authc'd, so don't idassert */
1959                                         BER_BVSTR( &authzID, "dn:" );
1960                                         break;
1961                                 }
1962                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1963                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1964                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1965                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1966                                                 ndn.bv_val, ndn.bv_len + 1 );
1967                                 freeauthz = 1;
1968                                 break;
1969
1970                         default:
1971                                 break;
1972                         }
1973                 }
1974
1975                 if ( li->li_idassert_secprops != NULL ) {
1976                         rs->sr_err = ldap_set_option( lc->lc_ld,
1977                                 LDAP_OPT_X_SASL_SECPROPS,
1978                                 (void *)li->li_idassert_secprops );
1979
1980                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1981                                 rs->sr_err = LDAP_OTHER;
1982                                 if ( sendok & LDAP_BACK_SENDERR ) {
1983                                         send_ldap_result( op, rs );
1984                                 }
1985                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1986                                 goto done;
1987                         }
1988                 }
1989
1990                 defaults = lutil_sasl_defaults( lc->lc_ld,
1991                                 li->li_idassert_sasl_mech.bv_val,
1992                                 li->li_idassert_sasl_realm.bv_val,
1993                                 li->li_idassert_authcID.bv_val,
1994                                 li->li_idassert_passwd.bv_val,
1995                                 authzID.bv_val );
1996
1997                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn->bv_val,
1998                                 li->li_idassert_sasl_mech.bv_val, NULL, NULL,
1999                                 LDAP_SASL_QUIET, lutil_sasl_interact,
2000                                 defaults );
2001
2002                 rs->sr_err = slap_map_api2result( rs );
2003                 if ( rs->sr_err != LDAP_SUCCESS ) {
2004                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2005                         if ( sendok & LDAP_BACK_SENDERR ) {
2006                                 send_ldap_result( op, rs );
2007                         }
2008
2009                 } else {
2010                         LDAP_BACK_CONN_ISBOUND_SET( lc );
2011                 }
2012
2013                 lutil_sasl_freedefs( defaults );
2014                 if ( freeauthz ) {
2015                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
2016                 }
2017
2018                 goto done;
2019 #endif /* HAVE_CYRUS_SASL */
2020         }
2021
2022         switch ( li->li_idassert_authmethod ) {
2023         case LDAP_AUTH_NONE:
2024                 /* FIXME: do we really need this? */
2025                 BER_BVSTR( binddn, "" );
2026                 BER_BVSTR( bindcred, "" );
2027                 /* fallthru */
2028
2029         case LDAP_AUTH_SIMPLE:
2030                 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
2031                                 binddn->bv_val, LDAP_SASL_SIMPLE,
2032                                 bindcred, NULL, NULL, &msgid );
2033                 rc = ldap_back_op_result( lc, op, rs, msgid,
2034                         -1, ( sendok | LDAP_BACK_BINDING ) );
2035                 break;
2036
2037         default:
2038                 /* unsupported! */
2039                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2040                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
2041                 if ( sendok & LDAP_BACK_SENDERR ) {
2042                         send_ldap_result( op, rs );
2043                 }
2044                 goto done;
2045         }
2046
2047         if ( rc == LDAP_SUCCESS ) {
2048                 /* set rebind stuff in case of successful proxyAuthz bind,
2049                  * so that referral chasing is attempted using the right
2050                  * identity */
2051                 LDAP_BACK_CONN_ISBOUND_SET( lc );
2052                 ber_bvreplace( &lc->lc_bound_ndn, binddn );
2053
2054                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
2055                         memset( lc->lc_cred.bv_val, 0,
2056                                         lc->lc_cred.bv_len );
2057                 }
2058
2059                 if ( LDAP_BACK_SAVECRED( li ) ) {
2060                         ber_bvreplace( &lc->lc_cred, bindcred );
2061                         ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
2062
2063                 } else {
2064                         lc->lc_cred.bv_len = 0;
2065                 }
2066         }
2067 done:;
2068         return LDAP_BACK_CONN_ISBOUND( lc );
2069 }
2070
2071 /*
2072  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
2073  * to existing server-side controls if required; if not,
2074  * the existing server-side controls are placed in *pctrls.
2075  * The caller, after using the controls in client API
2076  * operations, if ( *pctrls != op->o_ctrls ), should
2077  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
2078  * The function returns success if the control could
2079  * be added if required, or if it did nothing; in the future,
2080  * it might return some error if it failed.
2081  *
2082  * if no bind took place yet, but the connection is bound
2083  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
2084  * and explicitly add proxyAuthz the control to every operation
2085  * with the dn bound to the connection as control value.
2086  *
2087  * If no server-side controls are defined for the operation,
2088  * simply add the proxyAuthz control; otherwise, if the
2089  * proxyAuthz control is not already set, add it as
2090  * the first one
2091  *
2092  * FIXME: is controls order significant for security?
2093  * ANSWER: controls ordering and interoperability
2094  * must be indicated by the specs of each control; if none
2095  * is specified, the order is irrelevant.
2096  */
2097 int
2098 ldap_back_proxy_authz_ctrl(
2099                 struct berval   *bound_ndn,
2100                 int             version,
2101                 slap_idassert_t *si,
2102                 Operation       *op,
2103                 SlapReply       *rs,
2104                 LDAPControl     ***pctrls )
2105 {
2106         LDAPControl             **ctrls = NULL;
2107         int                     i = 0;
2108         slap_idassert_mode_t    mode;
2109         struct berval           assertedID,
2110                                 ndn;
2111         int                     isroot = 0;
2112
2113         *pctrls = NULL;
2114
2115         rs->sr_err = LDAP_SUCCESS;
2116
2117         /* don't proxyAuthz if protocol is not LDAPv3 */
2118         switch ( version ) {
2119         case LDAP_VERSION3:
2120                 break;
2121
2122         case 0:
2123                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
2124                         break;
2125                 }
2126                 /* fall thru */
2127
2128         default:
2129                 goto done;
2130         }
2131
2132         /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
2133          * but if it is not set this test fails.  We need a different
2134          * means to detect if idassert is enabled */
2135         if ( ( BER_BVISNULL( &si->si_bc.sb_authcId ) || BER_BVISEMPTY( &si->si_bc.sb_authcId ) )
2136                 && ( BER_BVISNULL( &si->si_bc.sb_binddn ) || BER_BVISEMPTY( &si->si_bc.sb_binddn ) )
2137                 && BER_BVISNULL( &si->si_bc.sb_saslmech ) )
2138         {
2139                 goto done;
2140         }
2141
2142         if ( !op->o_conn || op->o_do_not_cache || ( isroot = be_isroot( op ) ) ) {
2143                 goto done;
2144         }
2145
2146         if ( op->o_tag == LDAP_REQ_BIND ) {
2147                 ndn = op->o_req_ndn;
2148
2149         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2150                 ndn = op->o_conn->c_ndn;
2151
2152         } else {
2153                 ndn = op->o_ndn;
2154         }
2155
2156         if ( si->si_mode == LDAP_BACK_IDASSERT_LEGACY ) {
2157                 if ( op->o_proxy_authz ) {
2158                         /*
2159                          * FIXME: we do not want to perform proxyAuthz
2160                          * on behalf of the client, because this would
2161                          * be performed with "proxyauthzdn" privileges.
2162                          *
2163                          * This might actually be too strict, since
2164                          * the "proxyauthzdn" authzTo, and each entry's
2165                          * authzFrom attributes may be crafted
2166                          * to avoid unwanted proxyAuthz to take place.
2167                          */
2168 #if 0
2169                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2170                         rs->sr_text = "proxyAuthz not allowed within namingContext";
2171 #endif
2172                         goto done;
2173                 }
2174
2175                 if ( !BER_BVISNULL( bound_ndn ) ) {
2176                         goto done;
2177                 }
2178
2179                 if ( BER_BVISNULL( &ndn ) ) {
2180                         goto done;
2181                 }
2182
2183                 if ( BER_BVISNULL( &si->si_bc.sb_binddn ) ) {
2184                         goto done;
2185                 }
2186
2187         } else if ( si->si_bc.sb_method == LDAP_AUTH_SASL ) {
2188                 if ( ( si->si_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
2189                 {
2190                         /* already asserted in SASL via native authz */
2191                         goto done;
2192                 }
2193
2194         } else if ( si->si_authz && !isroot ) {
2195                 int             rc;
2196                 struct berval authcDN;
2197
2198                 if ( BER_BVISNULL( &ndn ) ) {
2199                         authcDN = slap_empty_bv;
2200                 } else {
2201                         authcDN = ndn;
2202                 }
2203                 rc = slap_sasl_matches( op, si->si_authz,
2204                                 &authcDN, & authcDN );
2205                 if ( rc != LDAP_SUCCESS ) {
2206                         if ( si->si_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2207                                 /* ndn is not authorized
2208                                  * to use idassert */
2209                                 rs->sr_err = rc;
2210                         }
2211                         goto done;
2212                 }
2213         }
2214
2215         if ( op->o_proxy_authz ) {
2216                 /*
2217                  * FIXME: we can:
2218                  * 1) ignore the already set proxyAuthz control
2219                  * 2) leave it in place, and don't set ours
2220                  * 3) add both
2221                  * 4) reject the operation
2222                  *
2223                  * option (4) is very drastic
2224                  * option (3) will make the remote server reject
2225                  * the operation, thus being equivalent to (4)
2226                  * option (2) will likely break the idassert
2227                  * assumptions, so we cannot accept it;
2228                  * option (1) means that we are contradicting
2229                  * the client's reques.
2230                  *
2231                  * I think (4) is the only correct choice.
2232                  */
2233                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2234                 rs->sr_text = "proxyAuthz not allowed within namingContext";
2235         }
2236
2237         if ( op->o_is_auth_check ) {
2238                 mode = LDAP_BACK_IDASSERT_NOASSERT;
2239
2240         } else {
2241                 mode = si->si_mode;
2242         }
2243
2244         switch ( mode ) {
2245         case LDAP_BACK_IDASSERT_LEGACY:
2246                 /* original behavior:
2247                  * assert the client's identity */
2248         case LDAP_BACK_IDASSERT_SELF:
2249                 assertedID = ndn;
2250                 break;
2251
2252         case LDAP_BACK_IDASSERT_ANONYMOUS:
2253                 /* assert "anonymous" */
2254                 assertedID = slap_empty_bv;
2255                 break;
2256
2257         case LDAP_BACK_IDASSERT_NOASSERT:
2258                 /* don't assert; bind as proxyauthzdn */
2259                 goto done;
2260
2261         case LDAP_BACK_IDASSERT_OTHERID:
2262         case LDAP_BACK_IDASSERT_OTHERDN:
2263                 /* assert idassert DN */
2264                 assertedID = si->si_bc.sb_authzId;
2265                 break;
2266
2267         default:
2268                 assert( 0 );
2269         }
2270
2271         /* if we got here, "" is allowed to proxyAuthz */
2272         if ( BER_BVISNULL( &assertedID ) ) {
2273                 assertedID = slap_empty_bv;
2274         }
2275
2276         /* don't idassert the bound DN (ITS#4497) */
2277         if ( dn_match( &assertedID, bound_ndn ) ) {
2278                 goto done;
2279         }
2280
2281         if ( op->o_ctrls ) {
2282                 for ( i = 0; op->o_ctrls[ i ]; i++ )
2283                         /* just count ctrls */ ;
2284         }
2285
2286         ctrls = op->o_tmpalloc( sizeof( LDAPControl * ) * (i + 2) + sizeof( LDAPControl ),
2287                         op->o_tmpmemctx );
2288         ctrls[ 0 ] = (LDAPControl *)&ctrls[ i + 2 ];
2289
2290         ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
2291         ctrls[ 0 ]->ldctl_iscritical = 1;
2292
2293         switch ( si->si_mode ) {
2294         /* already in u:ID or dn:DN form */
2295         case LDAP_BACK_IDASSERT_OTHERID:
2296         case LDAP_BACK_IDASSERT_OTHERDN:
2297                 ber_dupbv_x( &ctrls[ 0 ]->ldctl_value, &assertedID, op->o_tmpmemctx );
2298                 break;
2299
2300         /* needs the dn: prefix */
2301         default:
2302                 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
2303                 ctrls[ 0 ]->ldctl_value.bv_val = op->o_tmpalloc( ctrls[ 0 ]->ldctl_value.bv_len + 1,
2304                                 op->o_tmpmemctx );
2305                 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
2306                 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
2307                                 assertedID.bv_val, assertedID.bv_len + 1 );
2308                 break;
2309         }
2310
2311         /* Older versions of <draft-weltman-ldapv3-proxy> required
2312          * to encode the value of the authzID (and called it proxyDN);
2313          * this hack provides compatibility with those DSAs that
2314          * implement it this way */
2315         if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
2316                 struct berval           authzID = ctrls[ 0 ]->ldctl_value;
2317                 BerElementBuffer        berbuf;
2318                 BerElement              *ber = (BerElement *)&berbuf;
2319                 ber_tag_t               tag;
2320
2321                 ber_init2( ber, 0, LBER_USE_DER );
2322                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2323
2324                 tag = ber_printf( ber, "O", &authzID );
2325                 if ( tag == LBER_ERROR ) {
2326                         rs->sr_err = LDAP_OTHER;
2327                         goto free_ber;
2328                 }
2329
2330                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
2331                         rs->sr_err = LDAP_OTHER;
2332                         goto free_ber;
2333                 }
2334
2335 free_ber:;
2336                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2337                 ber_free_buf( ber );
2338
2339                 if ( rs->sr_err != LDAP_SUCCESS ) {
2340                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
2341                         ctrls = NULL;
2342                         goto done;
2343                 }
2344
2345         } else if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
2346                 struct berval           authzID = ctrls[ 0 ]->ldctl_value,
2347                                         tmp;
2348                 BerElementBuffer        berbuf;
2349                 BerElement              *ber = (BerElement *)&berbuf;
2350                 ber_tag_t               tag;
2351
2352                 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
2353                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
2354                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
2355                         ctrls = NULL;
2356                         rs->sr_err = LDAP_PROTOCOL_ERROR;
2357                         goto done;
2358                 }
2359
2360                 tmp = authzID;
2361                 tmp.bv_val += STRLENOF( "dn:" );
2362                 tmp.bv_len -= STRLENOF( "dn:" );
2363
2364                 ber_init2( ber, 0, LBER_USE_DER );
2365                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2366
2367                 /* apparently, Mozilla API encodes this
2368                  * as "SEQUENCE { LDAPDN }" */
2369                 tag = ber_printf( ber, "{O}", &tmp );
2370                 if ( tag == LBER_ERROR ) {
2371                         rs->sr_err = LDAP_OTHER;
2372                         goto free_ber2;
2373                 }
2374
2375                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
2376                         rs->sr_err = LDAP_OTHER;
2377                         goto free_ber2;
2378                 }
2379
2380 free_ber2:;
2381                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2382                 ber_free_buf( ber );
2383
2384                 if ( rs->sr_err != LDAP_SUCCESS ) {
2385                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
2386                         ctrls = NULL;
2387                         goto done;
2388                 }
2389
2390                 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
2391         }
2392
2393         if ( op->o_ctrls ) {
2394                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
2395                         ctrls[ i + 1 ] = op->o_ctrls[ i ];
2396                 }
2397         }
2398         ctrls[ i + 1 ] = NULL;
2399
2400 done:;
2401         if ( ctrls == NULL ) {
2402                 ctrls = op->o_ctrls;
2403         }
2404
2405         *pctrls = ctrls;
2406
2407         return rs->sr_err;
2408 }
2409
2410 int
2411 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
2412 {
2413         LDAPControl     **ctrls = *pctrls;
2414
2415         /* we assume that the first control is the proxyAuthz
2416          * added by back-ldap, so it's the only one we explicitly
2417          * free */
2418         if ( ctrls && ctrls != op->o_ctrls ) {
2419                 assert( ctrls[ 0 ] != NULL );
2420
2421                 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
2422                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
2423                 }
2424
2425                 op->o_tmpfree( ctrls, op->o_tmpmemctx );
2426         }
2427
2428         *pctrls = NULL;
2429
2430         return 0;
2431 }