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         slap_bindconf *sb;
 605 #endif /* HAVE_TLS */
 606
 607         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 608         rs->sr_err = ldap_initialize( &ld, li->li_uri );
 609         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 610         if ( rs->sr_err != LDAP_SUCCESS ) {
 611                 goto error_return;
 612         }
 613
 614         if ( li->li_urllist_f ) {
 615                 ldap_set_urllist_proc( ld, li->li_urllist_f, li->li_urllist_p );
 616         }
 617
 618         /* Set LDAP version. This will always succeed: If the client
 619          * bound with a particular version, then so can we.
 620          */
 621         if ( li->li_version != 0 ) {
 622                 version = li->li_version;
 623
 624         } else if ( op->o_protocol != 0 ) {
 625                 version = op->o_protocol;
 626
 627         } else {
 628                 /* assume it's an internal op; set to LDAPv3 */
 629                 version = LDAP_VERSION3;
 630         }
 631         ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
 632
 633         /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
 634         ldap_set_option( ld, LDAP_OPT_REFERRALS,
 635                 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
 636
 637         if ( li->li_network_timeout > 0 ) {
 638                 struct timeval          tv;
 639
 640                 tv.tv_sec = li->li_network_timeout;
 641                 tv.tv_usec = 0;
 642                 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
 643         }
 644
 645 #ifdef HAVE_TLS
 646         if ( LDAP_BACK_CONN_ISPRIV( lc ) ) {
 647                 sb = &li->li_acl;
 648
 649         } else if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
 650                 sb = &li->li_idassert.si_bc;
 651
 652         } else {
 653                 sb = &li->li_tls;
 654         }
 655
 656         if ( sb->sb_tls_do_init ) {
 657                 bindconf_tls_set( sb, ld );
 658         } else if ( sb->sb_tls_ctx ) {
 659                 ldap_set_option( ld, LDAP_OPT_X_TLS_CTX, sb->sb_tls_ctx );
 660         }
 661
 662         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 663         rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
 664                         li->li_uri, li->li_flags, li->li_nretries, &rs->sr_text );
 665         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 666         if ( rs->sr_err != LDAP_SUCCESS ) {
 667                 ldap_unbind_ext( ld, NULL, NULL );
 668                 goto error_return;
 669
 670         } else if ( li->li_idle_timeout ) {
 671                 /* only touch when activity actually took place... */
 672                 lc_time = op->o_time;
 673         }
 674 #endif /* HAVE_TLS */
 675
 676         lc->lc_ld = ld;
 677         lc->lc_refcnt = 1;
 678 #ifdef HAVE_TLS
 679         if ( is_tls ) {
 680                 LDAP_BACK_CONN_ISTLS_SET( lc );
 681         } else {
 682                 LDAP_BACK_CONN_ISTLS_CLEAR( lc );
 683         }
 684         if ( lc_time != (time_t)(-1) ) {
 685                 lc->lc_time = lc_time;
 686         }
 687 #endif /* HAVE_TLS */
 688
 689 error_return:;
 690         if ( rs->sr_err != LDAP_SUCCESS ) {
 691                 rs->sr_err = slap_map_api2result( rs );
 692                 if ( sendok & LDAP_BACK_SENDERR ) {
 693                         if ( rs->sr_text == NULL ) {
 694                                 rs->sr_text = "ldap_initialize() failed";
 695                         }
 696                         send_ldap_result( op, rs );
 697                         rs->sr_text = NULL;
 698                 }
 699
 700         } else {
 701                 if ( li->li_conn_ttl > 0 ) {
 702                         lc->lc_create_time = op->o_time;
 703                 }
 704         }
 705
 706         return rs->sr_err;
 707 }
 708
 709 static ldapconn_t *
 710 ldap_back_getconn(
 711         Operation               *op,
 712         SlapReply               *rs,
 713         ldap_back_send_t        sendok,
 714         struct berval           *binddn,
 715         struct berval           *bindcred )
 716 {
 717         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 718         ldapconn_t      *lc = NULL,
 719                         lc_curr = { 0 };
 720         int             refcnt = 1,
 721                         lookupconn = !( sendok & LDAP_BACK_BINDING );
 722
 723         /* if the server is quarantined, and
 724          * - the current interval did not expire yet, or
 725          * - no more retries should occur,
 726          * don't return the connection */
 727         if ( li->li_isquarantined ) {
 728                 slap_retry_info_t       *ri = &li->li_quarantine;
 729                 int                     dont_retry = 1;
 730
 731                 if ( li->li_quarantine.ri_interval ) {
 732                         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
 733                         if ( li->li_isquarantined == LDAP_BACK_FQ_YES ) {
 734                                 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
 735                                         || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
 736                                 if ( !dont_retry ) {
 737                                         Debug( LDAP_DEBUG_ANY,
 738                                                 "%s: ldap_back_getconn quarantine "
 739                                                 "retry block #%d try #%d.\n",
 740                                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
 741                                         li->li_isquarantined = LDAP_BACK_FQ_RETRYING;
 742                                 }
 743                         }
 744                         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
 745                 }
 746
 747                 if ( dont_retry ) {
 748                         rs->sr_err = LDAP_UNAVAILABLE;
 749                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
 750                                 send_ldap_result( op, rs );
 751                         }
 752                         return NULL;
 753                 }
 754         }
 755
 756         /* Internal searches are privileged and shared. So is root. */
 757         if ( op->o_do_not_cache || be_isroot( op ) ) {
 758                 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
 759                 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
 760                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 761
 762         } else {
 763                 struct berval   tmpbinddn,
 764                                 tmpbindcred,
 765                                 save_o_dn,
 766                                 save_o_ndn;
 767                 int             isproxyauthz;
 768
 769                 /* need cleanup */
 770                 if ( binddn == NULL ) {
 771                         binddn = &tmpbinddn;
 772                 }
 773                 if ( bindcred == NULL ) {
 774                         bindcred = &tmpbindcred;
 775                 }
 776                 if ( op->o_tag == LDAP_REQ_BIND ) {
 777                         save_o_dn = op->o_dn;
 778                         save_o_ndn = op->o_ndn;
 779                         op->o_dn = op->o_req_dn;
 780                         op->o_ndn = op->o_req_ndn;
 781                 }
 782                 isproxyauthz = ldap_back_is_proxy_authz( op, rs, sendok, binddn, bindcred );
 783                 if ( isproxyauthz == -1 ) {
 784                         return NULL;
 785                 }
 786                 if ( op->o_tag == LDAP_REQ_BIND ) {
 787                         op->o_dn = save_o_dn;
 788                         op->o_ndn = save_o_ndn;
 789                 }
 790
 791                 lc_curr.lc_local_ndn = op->o_ndn;
 792                 /* Explicit binds must not be shared;
 793                  * however, explicit binds are piped in a special connection
 794                  * when idassert is to occur with "override" set */
 795                 if ( op->o_tag == LDAP_REQ_BIND && !isproxyauthz ) {
 796                         lc_curr.lc_conn = op->o_conn;
 797
 798                 } else {
 799                         if ( isproxyauthz && !( sendok & LDAP_BACK_BINDING ) ) {
 800                                 lc_curr.lc_local_ndn = *binddn;
 801                                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 802                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 803
 804                         } else if ( isproxyauthz && ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) {
 805                                 lc_curr.lc_local_ndn = slap_empty_bv;
 806                                 LDAP_BACK_PCONN_BIND_SET( &lc_curr, op );
 807                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 808                                 lookupconn = 1;
 809
 810                         } else if ( SLAP_IS_AUTHZ_BACKEND( op ) ) {
 811                                 lc_curr.lc_conn = op->o_conn;
 812
 813                         } else {
 814                                 LDAP_BACK_PCONN_ANON_SET( &lc_curr, op );
 815                         }
 816                 }
 817         }
 818
 819         /* Explicit Bind requests always get their own conn */
 820         if ( lookupconn ) {
 821 retry_lock:
 822                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 823                 if ( LDAP_BACK_PCONN_ISPRIV( &lc_curr ) ) {
 824                         /* lookup a conn that's not binding */
 825                         LDAP_TAILQ_FOREACH( lc,
 826                                 &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv,
 827                                 lc_q )
 828                         {
 829                                 if ( !LDAP_BACK_CONN_BINDING( lc ) && lc->lc_refcnt == 0 ) {
 830                                         break;
 831                                 }
 832                         }
 833
 834                         if ( lc != NULL ) {
 835                                 if ( lc != LDAP_TAILQ_LAST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 836                                         ldapconn_t, lc_q ) )
 837                                 {
 838                                         LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 839                                                 lc, lc_q );
 840                                         LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
 841                                         LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 842                                                 lc, lc_q );
 843                                 }
 844
 845                         } else if ( !LDAP_BACK_USE_TEMPORARIES( li )
 846                                 && li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_num == li->li_conn_priv_max )
 847                         {
 848                                 lc = LDAP_TAILQ_FIRST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv );
 849                         }
 850
 851                 } else {
 852
 853                         /* Searches for a ldapconn in the avl tree */
 854                         lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 855                                         (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 856                 }
 857
 858                 if ( lc != NULL ) {
 859                         /* Don't reuse connections while they're still binding */
 860                         if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 861                                 if ( !LDAP_BACK_USE_TEMPORARIES( li ) ) {
 862                                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 863
 864                                         ldap_pvt_thread_yield();
 865                                         goto retry_lock;
 866                                 }
 867                                 lc = NULL;
 868                         }
 869
 870                         if ( lc != NULL ) {
 871                                 if ( op->o_tag == LDAP_REQ_BIND ) {
 872                                         /* right now, this is the only possible case */
 873                                         assert( ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) );
 874                                         LDAP_BACK_CONN_BINDING_SET( lc );
 875                                 }
 876
 877                                 refcnt = ++lc->lc_refcnt;
 878                         }
 879                 }
 880                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 881         }
 882
 883         /* Looks like we didn't get a bind. Open a new session... */
 884         if ( lc == NULL ) {
 885                 lc = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
 886                 lc->lc_flags = li->li_flags;
 887                 lc->lc_lcflags = lc_curr.lc_lcflags;
 888                 if ( ldap_back_prepare_conn( lc, op, rs, sendok ) != LDAP_SUCCESS ) {
 889                         ch_free( lc );
 890                         return NULL;
 891                 }
 892
 893                 if ( sendok & LDAP_BACK_BINDING ) {
 894                         LDAP_BACK_CONN_BINDING_SET( lc );
 895                 }
 896
 897                 lc->lc_conn = lc_curr.lc_conn;
 898                 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
 899
 900                 /*
 901                  * the rationale is: connections as the rootdn are privileged,
 902                  * so acl_authcDN is to be used; however, in some cases
 903                  * one already configured identity assertion with a highly
 904                  * privileged idassert_authcDN, so if acl_authcDN is NULL
 905                  * and idassert_authcDN is not, use the second instead.
 906                  *
 907                  * might change in the future, because it's preferable
 908                  * to make clear what identity is being used, since
 909                  * the only drawback is that one risks to configure
 910                  * the same identity twice...
 911                  */
 912                 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
 913                         if ( BER_BVISNULL( &li->li_acl_authcDN ) && !BER_BVISNULL( &li->li_idassert_authcDN ) ) {
 914                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
 915                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
 916
 917                         } else {
 918                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
 919                                 ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
 920                         }
 921                         LDAP_BACK_CONN_ISPRIV_SET( lc );
 922
 923                 } else if ( LDAP_BACK_CONN_ISIDASSERT( &lc_curr ) ) {
 924                         if ( !LDAP_BACK_PCONN_ISBIND( &lc_curr ) ) {
 925                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
 926                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
 927                         }
 928                         LDAP_BACK_CONN_ISIDASSERT_SET( lc );
 929
 930                 } else {
 931                         BER_BVZERO( &lc->lc_cred );
 932                         BER_BVZERO( &lc->lc_bound_ndn );
 933                         if ( !BER_BVISEMPTY( &op->o_ndn )
 934                                 && SLAP_IS_AUTHZ_BACKEND( op ) )
 935                         {
 936                                 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
 937                         }
 938                 }
 939
 940 #ifdef HAVE_TLS
 941                 /* if start TLS failed but it was not mandatory,
 942                  * check if the non-TLS connection was already
 943                  * in cache; in case, destroy the newly created
 944                  * connection and use the existing one */
 945                 if ( LDAP_BACK_PCONN_ISTLS( lc )
 946                                 && !ldap_tls_inplace( lc->lc_ld ) )
 947                 {
 948                         ldapconn_t      *tmplc = NULL;
 949                         int             idx = LDAP_BACK_CONN2PRIV( &lc_curr ) - 1;
 950
 951                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 952                         LDAP_TAILQ_FOREACH( tmplc,
 953                                 &li->li_conn_priv[ idx ].lic_priv,
 954                                 lc_q )
 955                         {
 956                                 if ( !LDAP_BACK_CONN_BINDING( tmplc ) ) {
 957                                         break;
 958                                 }
 959                         }
 960
 961                         if ( tmplc != NULL ) {
 962                                 refcnt = ++tmplc->lc_refcnt;
 963                                 ldap_back_conn_free( lc );
 964                                 lc = tmplc;
 965                         }
 966                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 967
 968                         if ( tmplc != NULL ) {
 969                                 goto done;
 970                         }
 971                 }
 972 #endif /* HAVE_TLS */
 973
 974                 /* Inserts the newly created ldapconn in the avl tree */
 975                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 976
 977                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 978
 979                 assert( lc->lc_refcnt == 1 );
 980
 981 #if LDAP_BACK_PRINT_CONNTREE > 0
 982                 ldap_back_print_conntree( li, ">>> ldap_back_getconn(insert)" );
 983 #endif /* LDAP_BACK_PRINT_CONNTREE */
 984
 985                 if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
 986                         if ( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num < li->li_conn_priv_max ) {
 987                                 LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
 988                                 li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num++;
 989                                 LDAP_BACK_CONN_CACHED_SET( lc );
 990
 991                         } else {
 992                                 LDAP_BACK_CONN_TAINTED_SET( lc );
 993                         }
 994                         rs->sr_err = 0;
 995
 996                 } else {
 997                         rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 998                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 999                         LDAP_BACK_CONN_CACHED_SET( lc );
1000                 }
1001
1002 #if LDAP_BACK_PRINT_CONNTREE > 0
1003                 ldap_back_print_conntree( li, "<<< ldap_back_getconn(insert)" );
1004 #endif /* LDAP_BACK_PRINT_CONNTREE */
1005
1006                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1007
1008                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1009                         char    buf[ SLAP_TEXT_BUFLEN ];
1010
1011                         snprintf( buf, sizeof( buf ),
1012                                 "lc=%p inserted refcnt=%u rc=%d",
1013                                 (void *)lc, refcnt, rs->sr_err );
1014
1015                         Debug( LDAP_DEBUG_TRACE,
1016                                 "=>ldap_back_getconn: %s: %s\n",
1017                                 op->o_log_prefix, buf, 0 );
1018                 }
1019
1020                 if ( !LDAP_BACK_PCONN_ISPRIV( lc ) ) {
1021                         /* Err could be -1 in case a duplicate ldapconn is inserted */
1022                         switch ( rs->sr_err ) {
1023                         case 0:
1024                                 break;
1025
1026                         case -1:
1027                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1028                                 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( li ) ) {
1029                                         /* duplicate: free and try to get the newly created one */
1030                                         ldap_back_conn_free( lc );
1031                                         lc = NULL;
1032                                         goto retry_lock;
1033                                 }
1034
1035                                 /* taint connection, so that it'll be freed when released */
1036                                 LDAP_BACK_CONN_TAINTED_SET( lc );
1037                                 break;
1038
1039                         default:
1040                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1041                                 ldap_back_conn_free( lc );
1042                                 rs->sr_err = LDAP_OTHER;
1043                                 rs->sr_text = "proxy bind collision";
1044                                 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1045                                         send_ldap_result( op, rs );
1046                                         rs->sr_text = NULL;
1047                                 }
1048                                 return NULL;
1049                         }
1050                 }
1051
1052         } else {
1053                 int     expiring = 0;
1054
1055                 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
1056                         || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
1057                 {
1058                         expiring = 1;
1059
1060                         /* let it be used, but taint/delete it so that
1061                          * no-one else can look it up any further */
1062                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1063
1064 #if LDAP_BACK_PRINT_CONNTREE > 0
1065                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1066 #endif /* LDAP_BACK_PRINT_CONNTREE */
1067
1068                         (void)ldap_back_conn_delete( li, lc );
1069                         LDAP_BACK_CONN_TAINTED_SET( lc );
1070
1071 #if LDAP_BACK_PRINT_CONNTREE > 0
1072                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1073 #endif /* LDAP_BACK_PRINT_CONNTREE */
1074
1075                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1076                 }
1077
1078                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1079                         char    buf[ SLAP_TEXT_BUFLEN ];
1080
1081                         snprintf( buf, sizeof( buf ),
1082                                 "conn %p fetched refcnt=%u%s",
1083                                 (void *)lc, refcnt,
1084                                 expiring ? " expiring" : "" );
1085                         Debug( LDAP_DEBUG_TRACE,
1086                                 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
1087                 }
1088         }
1089
1090 #ifdef HAVE_TLS
1091 done:;
1092 #endif /* HAVE_TLS */
1093
1094         return lc;
1095 }
1096
1097 void
1098 ldap_back_release_conn_lock(
1099         ldapinfo_t              *li,
1100         ldapconn_t              **lcp,
1101         int                     dolock )
1102 {
1103
1104         ldapconn_t      *lc = *lcp;
1105
1106         if ( dolock ) {
1107                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1108         }
1109         assert( lc->lc_refcnt > 0 );
1110         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1111         lc->lc_refcnt--;
1112         if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
1113                 ldap_back_freeconn( li, lc, 0 );
1114                 *lcp = NULL;
1115         }
1116         if ( dolock ) {
1117                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1118         }
1119 }
1120
1121 void
1122 ldap_back_quarantine(
1123         Operation       *op,
1124         SlapReply       *rs )
1125 {
1126         ldapinfo_t              *li = (ldapinfo_t *)op->o_bd->be_private;
1127
1128         slap_retry_info_t       *ri = &li->li_quarantine;
1129
1130         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
1131
1132         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1133                 time_t          new_last = slap_get_time();
1134
1135                 switch ( li->li_isquarantined ) {
1136                 case LDAP_BACK_FQ_NO:
1137                         if ( ri->ri_last == new_last ) {
1138                                 goto done;
1139                         }
1140
1141                         Debug( LDAP_DEBUG_ANY,
1142                                 "%s: ldap_back_quarantine enter.\n",
1143                                 op->o_log_prefix, 0, 0 );
1144
1145                         ri->ri_idx = 0;
1146                         ri->ri_count = 0;
1147                         break;
1148
1149                 case LDAP_BACK_FQ_RETRYING:
1150                         Debug( LDAP_DEBUG_ANY,
1151                                 "%s: ldap_back_quarantine block #%d try #%d failed.\n",
1152                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
1153
1154                         ++ri->ri_count;
1155                         if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1156                                 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1157                         {
1158                                 ri->ri_count = 0;
1159                                 ++ri->ri_idx;
1160                         }
1161                         break;
1162
1163                 default:
1164                         break;
1165                 }
1166
1167                 li->li_isquarantined = LDAP_BACK_FQ_YES;
1168                 ri->ri_last = new_last;
1169
1170         } else if ( li->li_isquarantined != LDAP_BACK_FQ_NO ) {
1171                 if ( ri->ri_last == slap_get_time() ) {
1172                         goto done;
1173                 }
1174
1175                 Debug( LDAP_DEBUG_ANY,
1176                         "%s: ldap_back_quarantine exit (%d) err=%d.\n",
1177                         op->o_log_prefix, li->li_isquarantined, rs->sr_err );
1178
1179                 if ( li->li_quarantine_f ) {
1180                         (void)li->li_quarantine_f( li, li->li_quarantine_p );
1181                 }
1182
1183                 ri->ri_count = 0;
1184                 ri->ri_idx = 0;
1185                 li->li_isquarantined = LDAP_BACK_FQ_NO;
1186         }
1187
1188 done:;
1189         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
1190 }
1191
1192 /*
1193  * ldap_back_dobind_int
1194  *
1195  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1196  */
1197 static int
1198 ldap_back_dobind_int(
1199         ldapconn_t              **lcp,
1200         Operation               *op,
1201         SlapReply               *rs,
1202         ldap_back_send_t        sendok,
1203         int                     retries,
1204         int                     dolock )
1205 {
1206         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1207
1208         ldapconn_t      *lc;
1209         struct berval   binddn = slap_empty_bv,
1210                         bindcred = slap_empty_bv;
1211
1212         int             rc = 0,
1213                         isbound,
1214                         binding = 0;
1215         ber_int_t       msgid;
1216
1217         assert( lcp != NULL );
1218         assert( retries >= 0 );
1219
1220         if ( sendok & LDAP_BACK_GETCONN ) {
1221                 assert( *lcp == NULL );
1222
1223                 lc = ldap_back_getconn( op, rs, sendok, &binddn, &bindcred );
1224                 if ( lc == NULL ) {
1225                         return 0;
1226                 }
1227                 *lcp = lc;
1228
1229         } else {
1230                 lc = *lcp;
1231         }
1232
1233         assert( lc != NULL );
1234
1235 retry_lock:;
1236         if ( dolock ) {
1237                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1238         }
1239
1240         if ( binding == 0 ) {
1241                 /* check if already bound */
1242                 rc = isbound = LDAP_BACK_CONN_ISBOUND( lc );
1243                 if ( isbound ) {
1244                         if ( dolock ) {
1245                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1246                         }
1247                         return rc;
1248                 }
1249
1250                 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
1251                         /* if someone else is about to bind it, give up and retry */
1252                         if ( dolock ) {
1253                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1254                         }
1255                         ldap_pvt_thread_yield();
1256                         goto retry_lock;
1257
1258                 } else {
1259                         /* otherwise this thread will bind it */
1260                         LDAP_BACK_CONN_BINDING_SET( lc );
1261                         binding = 1;
1262                 }
1263         }
1264
1265         if ( dolock ) {
1266                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1267         }
1268
1269         /*
1270          * FIXME: we need to let clients use proxyAuthz
1271          * otherwise we cannot do symmetric pools of servers;
1272          * we have to live with the fact that a user can
1273          * authorize itself as any ID that is allowed
1274          * by the authzTo directive of the "proxyauthzdn".
1275          */
1276         /*
1277          * NOTE: current Proxy Authorization specification
1278          * and implementation do not allow proxy authorization
1279          * control to be provided with Bind requests
1280          */
1281         /*
1282          * if no bind took place yet, but the connection is bound
1283          * and the "idassert-authcDN" (or other ID) is set,
1284          * then bind as the asserting identity and explicitly
1285          * add the proxyAuthz control to every operation with the
1286          * dn bound to the connection as control value.
1287          * This is done also if this is the authrizing backend,
1288          * but the "override" flag is given to idassert.
1289          * It allows to use SASL bind and yet proxyAuthz users
1290          */
1291         if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
1292                 if ( BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &bindcred ) ) {
1293                         /* if we got here, it shouldn't return result */
1294                         rc = ldap_back_is_proxy_authz( op, rs,
1295                                 LDAP_BACK_DONTSEND, &binddn, &bindcred );
1296                         assert( rc == 1 );
1297                 }
1298                 rc = ldap_back_proxy_authz_bind( lc, op, rs, sendok, &binddn, &bindcred );
1299                 goto done;
1300         }
1301
1302 #ifdef HAVE_CYRUS_SASL
1303         if ( LDAP_BACK_CONN_ISPRIV( lc )
1304                 && li->li_acl_authmethod == LDAP_AUTH_SASL )
1305         {
1306                 void            *defaults = NULL;
1307
1308                 if ( li->li_acl_secprops != NULL ) {
1309                         rc = ldap_set_option( lc->lc_ld,
1310                                 LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops );
1311
1312                         if ( rc != LDAP_OPT_SUCCESS ) {
1313                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
1314                                         "(SECPROPS,\"%s\") failed!\n",
1315                                         li->li_acl_secprops, 0, 0 );
1316                                 goto done;
1317                         }
1318                 }
1319
1320                 defaults = lutil_sasl_defaults( lc->lc_ld,
1321                                 li->li_acl_sasl_mech.bv_val,
1322                                 li->li_acl_sasl_realm.bv_val,
1323                                 li->li_acl_authcID.bv_val,
1324                                 li->li_acl_passwd.bv_val,
1325                                 NULL );
1326
1327                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
1328                                 li->li_acl_authcDN.bv_val,
1329                                 li->li_acl_sasl_mech.bv_val, NULL, NULL,
1330                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1331                                 defaults );
1332
1333                 lutil_sasl_freedefs( defaults );
1334
1335                 rs->sr_err = slap_map_api2result( rs );
1336                 if ( rs->sr_err != LDAP_SUCCESS ) {
1337                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1338                         if ( sendok & LDAP_BACK_SENDERR ) {
1339                                 send_ldap_result( op, rs );
1340                         }
1341
1342                 } else {
1343                         LDAP_BACK_CONN_ISBOUND_SET( lc );
1344                 }
1345
1346                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1347                         ldap_back_quarantine( op, rs );
1348                 }
1349
1350                 goto done;
1351         }
1352 #endif /* HAVE_CYRUS_SASL */
1353
1354 retry:;
1355         rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1356                         BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val,
1357                         LDAP_SASL_SIMPLE, &lc->lc_cred,
1358                         NULL, NULL, &msgid );
1359
1360         if ( rs->sr_err == LDAP_SERVER_DOWN ) {
1361                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
1362                         if ( dolock ) {
1363                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1364                         }
1365
1366                         assert( lc->lc_refcnt > 0 );
1367                         if ( lc->lc_refcnt == 1 ) {
1368                                 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1369                                 lc->lc_ld = NULL;
1370
1371                                 /* lc here must be the regular lc, reset and ready for init */
1372                                 rs->sr_err = ldap_back_prepare_conn( lc, op, rs, sendok );
1373                                 if ( rs->sr_err != LDAP_SUCCESS ) {
1374                                         lc->lc_refcnt = 0;
1375                                 }
1376                         }
1377
1378                         if ( dolock ) {
1379                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1380                         }
1381
1382                         if ( rs->sr_err == LDAP_SUCCESS ) {
1383                                 if ( retries > 0 ) {
1384                                         retries--;
1385                                 }
1386                                 goto retry;
1387                         }
1388                 }
1389
1390                 assert( lc->lc_refcnt == 1 );
1391                 lc->lc_refcnt = 0;
1392                 ldap_back_freeconn( li, lc, dolock );
1393                 *lcp = NULL;
1394                 rs->sr_err = slap_map_api2result( rs );
1395
1396                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1397                         ldap_back_quarantine( op, rs );
1398                 }
1399
1400                 if ( rs->sr_err != LDAP_SUCCESS &&
1401                         ( sendok & LDAP_BACK_SENDERR ) )
1402                 {
1403                         send_ldap_result( op, rs );
1404                 }
1405
1406                 return 0;
1407         }
1408
1409         rc = ldap_back_op_result( lc, op, rs, msgid,
1410                 -1, (sendok|LDAP_BACK_BINDING) );
1411         if ( rc == LDAP_SUCCESS ) {
1412                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1413         }
1414
1415 done:;
1416         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1417         rc = LDAP_BACK_CONN_ISBOUND( lc );
1418         if ( !rc ) {
1419                 ldap_back_release_conn_lock( li, lcp, dolock );
1420
1421         } else if ( LDAP_BACK_SAVECRED( li ) ) {
1422                 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
1423         }
1424
1425         return rc;
1426 }
1427
1428 /*
1429  * ldap_back_dobind
1430  *
1431  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1432  */
1433 int
1434 ldap_back_dobind( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1435 {
1436         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1437
1438         return ldap_back_dobind_int( lcp, op, rs,
1439                 ( sendok | LDAP_BACK_GETCONN ), li->li_nretries, 1 );
1440 }
1441
1442 /*
1443  * ldap_back_default_rebind
1444  *
1445  * This is a callback used for chasing referrals using the same
1446  * credentials as the original user on this session.
1447  */
1448 int
1449 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
1450         ber_int_t msgid, void *params )
1451 {
1452         ldapconn_t      *lc = (ldapconn_t *)params;
1453
1454 #ifdef HAVE_TLS
1455         /* ... otherwise we couldn't get here */
1456         assert( lc != NULL );
1457
1458         if ( !ldap_tls_inplace( ld ) ) {
1459                 int             is_tls = LDAP_BACK_CONN_ISTLS( lc ),
1460                                 rc;
1461                 const char      *text = NULL;
1462
1463                 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
1464                         LDAP_BACK_RETRY_DEFAULT, &text );
1465                 if ( rc != LDAP_SUCCESS ) {
1466                         return rc;
1467                 }
1468         }
1469 #endif /* HAVE_TLS */
1470
1471         /* FIXME: add checks on the URL/identity? */
1472
1473         return ldap_sasl_bind_s( ld,
1474                         BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val,
1475                         LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
1476 }
1477
1478 /*
1479  * ldap_back_default_urllist
1480  */
1481 int
1482 ldap_back_default_urllist(
1483         LDAP            *ld,
1484         LDAPURLDesc     **urllist,
1485         LDAPURLDesc     **url,
1486         void            *params )
1487 {
1488         ldapinfo_t      *li = (ldapinfo_t *)params;
1489         LDAPURLDesc     **urltail;
1490
1491         if ( urllist == url ) {
1492                 return LDAP_SUCCESS;
1493         }
1494
1495         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
1496                 /* count */ ;
1497
1498         *urltail = *urllist;
1499         *urllist = *url;
1500         *url = NULL;
1501
1502         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1503         if ( li->li_uri ) {
1504                 ch_free( li->li_uri );
1505         }
1506
1507         ldap_get_option( ld, LDAP_OPT_URI, (void *)&li->li_uri );
1508         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1509
1510         return LDAP_SUCCESS;
1511 }
1512
1513 int
1514 ldap_back_cancel(
1515                 ldapconn_t              *lc,
1516                 Operation               *op,
1517                 SlapReply               *rs,
1518                 ber_int_t               msgid,
1519                 ldap_back_send_t        sendok )
1520 {
1521         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1522
1523         /* default behavior */
1524         if ( LDAP_BACK_ABANDON( li ) ) {
1525                 return ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
1526         }
1527
1528         if ( LDAP_BACK_IGNORE( li ) ) {
1529                 return ldap_pvt_discard( lc->lc_ld, msgid );
1530         }
1531
1532         if ( LDAP_BACK_CANCEL( li ) ) {
1533                 /* FIXME: asynchronous? */
1534                 return ldap_cancel_s( lc->lc_ld, msgid, NULL, NULL );
1535         }
1536
1537         assert( 0 );
1538
1539         return LDAP_OTHER;
1540 }
1541
1542 int
1543 ldap_back_op_result(
1544                 ldapconn_t              *lc,
1545                 Operation               *op,
1546                 SlapReply               *rs,
1547                 ber_int_t               msgid,
1548                 time_t                  timeout,
1549                 ldap_back_send_t        sendok )
1550 {
1551         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1552
1553         char            *match = NULL;
1554         char            *text = NULL;
1555         char            **refs = NULL;
1556         LDAPControl     **ctrls = NULL;
1557
1558 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
1559
1560         rs->sr_text = NULL;
1561         rs->sr_matched = NULL;
1562         rs->sr_ref = NULL;
1563         rs->sr_ctrls = NULL;
1564
1565         /* if the error recorded in the reply corresponds
1566          * to a successful state, get the error from the
1567          * remote server response */
1568         if ( ERR_OK( rs->sr_err ) ) {
1569                 int             rc;
1570                 struct timeval  tv;
1571                 LDAPMessage     *res = NULL;
1572                 time_t          stoptime = (time_t)(-1);
1573                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
1574                                         LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
1575                 const char      *timeout_text = "Operation timed out";
1576
1577                 /* if timeout is not specified, compute and use
1578                  * the one specific to the ongoing operation */
1579                 if ( timeout == (time_t)(-1) ) {
1580                         slap_op_t       opidx = slap_req2op( op->o_tag );
1581
1582                         if ( opidx == SLAP_OP_SEARCH ) {
1583                                 if ( op->ors_tlimit <= 0 ) {
1584                                         timeout = 0;
1585
1586                                 } else {
1587                                         timeout = op->ors_tlimit;
1588                                         timeout_err = LDAP_TIMELIMIT_EXCEEDED;
1589                                         timeout_text = NULL;
1590                                 }
1591
1592                         } else {
1593                                 timeout = li->li_timeout[ opidx ];
1594                         }
1595                 }
1596
1597                 /* better than nothing :) */
1598                 if ( timeout == 0 ) {
1599                         if ( li->li_idle_timeout ) {
1600                                 timeout = li->li_idle_timeout;
1601
1602                         } else if ( li->li_conn_ttl ) {
1603                                 timeout = li->li_conn_ttl;
1604                         }
1605                 }
1606
1607                 if ( timeout ) {
1608                         stoptime = op->o_time + timeout;
1609                 }
1610
1611                 LDAP_BACK_TV_SET( &tv );
1612
1613 retry:;
1614                 /* if result parsing fails, note the failure reason */
1615                 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1616                 switch ( rc ) {
1617                 case 0:
1618                         if ( timeout && slap_get_time() > stoptime ) {
1619                                 if ( sendok & LDAP_BACK_BINDING ) {
1620                                         ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1621                                         lc->lc_ld = NULL;
1622
1623                                         /* let it be used, but taint/delete it so that
1624                                          * no-one else can look it up any further */
1625                                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1626
1627 #if LDAP_BACK_PRINT_CONNTREE > 0
1628                                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1629 #endif /* LDAP_BACK_PRINT_CONNTREE */
1630
1631                                         (void)ldap_back_conn_delete( li, lc );
1632                                         LDAP_BACK_CONN_TAINTED_SET( lc );
1633
1634 #if LDAP_BACK_PRINT_CONNTREE > 0
1635                                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1636 #endif /* LDAP_BACK_PRINT_CONNTREE */
1637                                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1638
1639                                 } else {
1640                                         (void)ldap_back_cancel( lc, op, rs, msgid, sendok );
1641                                 }
1642                                 rs->sr_err = timeout_err;
1643                                 rs->sr_text = timeout_text;
1644                                 break;
1645                         }
1646
1647                         /* timeout == 0 */
1648                         LDAP_BACK_TV_SET( &tv );
1649                         ldap_pvt_thread_yield();
1650                         goto retry;
1651
1652                 case -1:
1653                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
1654                                         &rs->sr_err );
1655                         break;
1656
1657
1658                 /* otherwise get the result; if it is not
1659                  * LDAP_SUCCESS, record it in the reply
1660                  * structure (this includes
1661                  * LDAP_COMPARE_{TRUE|FALSE}) */
1662                 default:
1663                         /* only touch when activity actually took place... */
1664                         if ( li->li_idle_timeout && lc ) {
1665                                 lc->lc_time = op->o_time;
1666                         }
1667
1668                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
1669                                         &match, &text, &refs, &ctrls, 1 );
1670                         rs->sr_text = text;
1671                         if ( rc != LDAP_SUCCESS ) {
1672                                 rs->sr_err = rc;
1673                         }
1674                         if ( refs != NULL ) {
1675                                 int     i;
1676
1677                                 for ( i = 0; refs[ i ] != NULL; i++ )
1678                                         /* count */ ;
1679                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1680                                         op->o_tmpmemctx );
1681                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1682                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1683                                 }
1684                                 BER_BVZERO( &rs->sr_ref[ i ] );
1685                         }
1686                         if ( ctrls != NULL ) {
1687                                 rs->sr_ctrls = ctrls;
1688                         }
1689                 }
1690         }
1691
1692         /* if the error in the reply structure is not
1693          * LDAP_SUCCESS, try to map it from client
1694          * to server error */
1695         if ( !ERR_OK( rs->sr_err ) ) {
1696                 rs->sr_err = slap_map_api2result( rs );
1697
1698                 /* internal ops ( op->o_conn == NULL )
1699                  * must not reply to client */
1700                 if ( op->o_conn && !op->o_do_not_cache && match ) {
1701
1702                         /* record the (massaged) matched
1703                          * DN into the reply structure */
1704                         rs->sr_matched = match;
1705                 }
1706         }
1707
1708         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1709                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1710                         if ( LDAP_BACK_QUARANTINE( li ) ) {
1711                                 ldap_back_quarantine( op, rs );
1712                         }
1713                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1714                                 send_ldap_result( op, rs );
1715                         }
1716                 }
1717
1718         } else if ( op->o_conn &&
1719                 ( ( ( sendok & LDAP_BACK_SENDOK ) && ERR_OK( rs->sr_err ) )
1720                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1721         {
1722                 send_ldap_result( op, rs );
1723         }
1724
1725         if ( match ) {
1726                 if ( rs->sr_matched != match ) {
1727                         free( (char *)rs->sr_matched );
1728                 }
1729                 rs->sr_matched = NULL;
1730                 ldap_memfree( match );
1731         }
1732
1733         if ( text ) {
1734                 ldap_memfree( text );
1735         }
1736         rs->sr_text = NULL;
1737
1738         if ( rs->sr_ref ) {
1739                 assert( refs != NULL );
1740                 ber_memvfree( (void **)refs );
1741                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1742                 rs->sr_ref = NULL;
1743         }
1744
1745         if ( ctrls ) {
1746                 assert( rs->sr_ctrls != NULL );
1747                 ldap_controls_free( ctrls );
1748                 rs->sr_ctrls = NULL;
1749         }
1750
1751         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1752 }
1753
1754 /* return true if bound, false if failed */
1755 int
1756 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1757 {
1758         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1759         int             rc = 0,
1760                         binding;
1761
1762         assert( lcp != NULL );
1763         assert( *lcp != NULL );
1764
1765         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1766
1767         if ( (*lcp)->lc_refcnt == 1 ) {
1768                 binding = LDAP_BACK_CONN_BINDING( *lcp );
1769
1770                 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1771                 Debug( LDAP_DEBUG_ANY,
1772                         "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
1773                         op->o_log_prefix, li->li_uri,
1774                         BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
1775                                 "" : (*lcp)->lc_bound_ndn.bv_val );
1776                 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1777
1778                 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
1779                 (*lcp)->lc_ld = NULL;
1780                 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
1781
1782                 /* lc here must be the regular lc, reset and ready for init */
1783                 rc = ldap_back_prepare_conn( *lcp, op, rs, sendok );
1784                 if ( rc != LDAP_SUCCESS ) {
1785                         /* freeit, because lc_refcnt == 1 */
1786                         (*lcp)->lc_refcnt = 0;
1787                         (void)ldap_back_freeconn( li, *lcp, 0 );
1788                         *lcp = NULL;
1789                         rc = 0;
1790
1791                 } else if ( ( sendok & LDAP_BACK_BINDING ) ) {
1792                         if ( binding ) {
1793                                 LDAP_BACK_CONN_BINDING_SET( *lcp );
1794                         }
1795                         rc = 1;
1796
1797                 } else {
1798                         rc = ldap_back_dobind_int( lcp, op, rs, sendok, 0, 0 );
1799                         if ( rc == 0 && *lcp != NULL ) {
1800                                 /* freeit, because lc_refcnt == 1 */
1801                                 (*lcp)->lc_refcnt = 0;
1802                                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
1803                                 (void)ldap_back_freeconn( li, *lcp, 0 );
1804                                 *lcp = NULL;
1805                         }
1806                 }
1807
1808         } else {
1809                 Debug( LDAP_DEBUG_TRACE,
1810                         "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
1811                         (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
1812
1813                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
1814                 ldap_back_release_conn_lock( li, lcp, 0 );
1815                 assert( *lcp == NULL );
1816
1817                 if ( sendok ) {
1818                         rs->sr_err = LDAP_UNAVAILABLE;
1819                         rs->sr_text = "unable to retry";
1820                         send_ldap_result( op, rs );
1821                 }
1822         }
1823
1824         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1825
1826         return rc;
1827 }
1828
1829 static int
1830 ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
1831         struct berval *binddn, struct berval *bindcred )
1832 {
1833         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1834         struct berval   ndn;
1835         int             dobind = 0;
1836
1837         if ( op->o_conn == NULL || op->o_do_not_cache ) {
1838                 goto done;
1839         }
1840
1841         /* don't proxyAuthz if protocol is not LDAPv3 */
1842         switch ( li->li_version ) {
1843         case LDAP_VERSION3:
1844                 break;
1845
1846         case 0:
1847                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1848                         break;
1849                 }
1850                 /* fall thru */
1851
1852         default:
1853                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1854                 if ( sendok & LDAP_BACK_SENDERR ) {
1855                         send_ldap_result( op, rs );
1856                         dobind = -1;
1857                 }
1858                 goto done;
1859         }
1860
1861         /* safe default */
1862         *binddn = slap_empty_bv;
1863         *bindcred = slap_empty_bv;
1864
1865         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1866                 ndn = op->o_conn->c_ndn;
1867
1868         } else {
1869                 ndn = op->o_ndn;
1870         }
1871
1872         switch ( li->li_idassert_mode ) {
1873         case LDAP_BACK_IDASSERT_LEGACY:
1874                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1875                         if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
1876                         {
1877                                 *binddn = li->li_idassert_authcDN;
1878                                 *bindcred = li->li_idassert_passwd;
1879                                 dobind = 1;
1880                         }
1881                 }
1882                 break;
1883
1884         default:
1885                 /* NOTE: rootdn can always idassert */
1886                 if ( BER_BVISNULL( &ndn )
1887                         && li->li_idassert_authz == NULL
1888                         && !( li->li_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1889                 {
1890                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1891                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1892                                 if ( sendok & LDAP_BACK_SENDERR ) {
1893                                         send_ldap_result( op, rs );
1894                                         dobind = -1;
1895                                 }
1896
1897                         } else {
1898                                 rs->sr_err = LDAP_SUCCESS;
1899                                 *binddn = slap_empty_bv;
1900                                 *bindcred = slap_empty_bv;
1901                                 break;
1902                         }
1903
1904                         goto done;
1905
1906                 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1907                         struct berval authcDN;
1908
1909                         if ( BER_BVISNULL( &ndn ) ) {
1910                                 authcDN = slap_empty_bv;
1911
1912                         } else {
1913                                 authcDN = ndn;
1914                         }
1915                         rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
1916                                         &authcDN, &authcDN );
1917                         if ( rs->sr_err != LDAP_SUCCESS ) {
1918                                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1919                                         if ( sendok & LDAP_BACK_SENDERR ) {
1920                                                 send_ldap_result( op, rs );
1921                                                 dobind = -1;
1922                                         }
1923
1924                                 } else {
1925                                         rs->sr_err = LDAP_SUCCESS;
1926                                         *binddn = slap_empty_bv;
1927                                         *bindcred = slap_empty_bv;
1928                                         break;
1929                                 }
1930
1931                                 goto done;
1932                         }
1933                 }
1934
1935                 *binddn = li->li_idassert_authcDN;
1936                 *bindcred = li->li_idassert_passwd;
1937                 dobind = 1;
1938                 break;
1939         }
1940
1941 done:;
1942         return dobind;
1943 }
1944
1945 static int
1946 ldap_back_proxy_authz_bind(
1947         ldapconn_t              *lc,
1948         Operation               *op,
1949         SlapReply               *rs,
1950         ldap_back_send_t        sendok,
1951         struct berval           *binddn,
1952         struct berval           *bindcred )
1953 {
1954         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1955         struct berval   ndn;
1956         int             msgid;
1957         int             rc;
1958
1959         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1960                 ndn = op->o_conn->c_ndn;
1961
1962         } else {
1963                 ndn = op->o_ndn;
1964         }
1965
1966         if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1967 #ifdef HAVE_CYRUS_SASL
1968                 void            *defaults = NULL;
1969                 struct berval   authzID = BER_BVNULL;
1970                 int             freeauthz = 0;
1971
1972                 /* if SASL supports native authz, prepare for it */
1973                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1974                                 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1975                 {
1976                         switch ( li->li_idassert_mode ) {
1977                         case LDAP_BACK_IDASSERT_OTHERID:
1978                         case LDAP_BACK_IDASSERT_OTHERDN:
1979                                 authzID = li->li_idassert_authzID;
1980                                 break;
1981
1982                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1983                                 BER_BVSTR( &authzID, "dn:" );
1984                                 break;
1985
1986                         case LDAP_BACK_IDASSERT_SELF:
1987                                 if ( BER_BVISNULL( &ndn ) ) {
1988                                         /* connection is not authc'd, so don't idassert */
1989                                         BER_BVSTR( &authzID, "dn:" );
1990                                         break;
1991                                 }
1992                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1993                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1994                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1995                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1996                                                 ndn.bv_val, ndn.bv_len + 1 );
1997                                 freeauthz = 1;
1998                                 break;
1999
2000                         default:
2001                                 break;
2002                         }
2003                 }
2004
2005                 if ( li->li_idassert_secprops != NULL ) {
2006                         rs->sr_err = ldap_set_option( lc->lc_ld,
2007                                 LDAP_OPT_X_SASL_SECPROPS,
2008                                 (void *)li->li_idassert_secprops );
2009
2010                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
2011                                 rs->sr_err = LDAP_OTHER;
2012                                 if ( sendok & LDAP_BACK_SENDERR ) {
2013                                         send_ldap_result( op, rs );
2014                                 }
2015                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2016                                 goto done;
2017                         }
2018                 }
2019
2020                 defaults = lutil_sasl_defaults( lc->lc_ld,
2021                                 li->li_idassert_sasl_mech.bv_val,
2022                                 li->li_idassert_sasl_realm.bv_val,
2023                                 li->li_idassert_authcID.bv_val,
2024                                 li->li_idassert_passwd.bv_val,
2025                                 authzID.bv_val );
2026
2027                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn->bv_val,
2028                                 li->li_idassert_sasl_mech.bv_val, NULL, NULL,
2029                                 LDAP_SASL_QUIET, lutil_sasl_interact,
2030                                 defaults );
2031
2032                 rs->sr_err = slap_map_api2result( rs );
2033                 if ( rs->sr_err != LDAP_SUCCESS ) {
2034                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2035                         if ( sendok & LDAP_BACK_SENDERR ) {
2036                                 send_ldap_result( op, rs );
2037                         }
2038
2039                 } else {
2040                         LDAP_BACK_CONN_ISBOUND_SET( lc );
2041                 }
2042
2043                 lutil_sasl_freedefs( defaults );
2044                 if ( freeauthz ) {
2045                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
2046                 }
2047
2048                 goto done;
2049 #endif /* HAVE_CYRUS_SASL */
2050         }
2051
2052         switch ( li->li_idassert_authmethod ) {
2053         case LDAP_AUTH_NONE:
2054                 /* FIXME: do we really need this? */
2055                 BER_BVSTR( binddn, "" );
2056                 BER_BVSTR( bindcred, "" );
2057                 /* fallthru */
2058
2059         case LDAP_AUTH_SIMPLE:
2060                 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
2061                                 binddn->bv_val, LDAP_SASL_SIMPLE,
2062                                 bindcred, NULL, NULL, &msgid );
2063                 rc = ldap_back_op_result( lc, op, rs, msgid,
2064                         -1, (sendok|LDAP_BACK_BINDING) );
2065                 break;
2066
2067         default:
2068                 /* unsupported! */
2069                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2070                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
2071                 if ( sendok & LDAP_BACK_SENDERR ) {
2072                         send_ldap_result( op, rs );
2073                 }
2074                 goto done;
2075         }
2076
2077         if ( rc == LDAP_SUCCESS ) {
2078                 /* set rebind stuff in case of successful proxyAuthz bind,
2079                  * so that referral chasing is attempted using the right
2080                  * identity */
2081                 LDAP_BACK_CONN_ISBOUND_SET( lc );
2082                 ber_bvreplace( &lc->lc_bound_ndn, binddn );
2083
2084                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
2085                         memset( lc->lc_cred.bv_val, 0,
2086                                         lc->lc_cred.bv_len );
2087                 }
2088
2089                 if ( LDAP_BACK_SAVECRED( li ) ) {
2090                         ber_bvreplace( &lc->lc_cred, bindcred );
2091                         ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
2092
2093                 } else {
2094                         lc->lc_cred.bv_len = 0;
2095                 }
2096         }
2097 done:;
2098         return LDAP_BACK_CONN_ISBOUND( lc );
2099 }
2100
2101 /*
2102  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
2103  * to existing server-side controls if required; if not,
2104  * the existing server-side controls are placed in *pctrls.
2105  * The caller, after using the controls in client API
2106  * operations, if ( *pctrls != op->o_ctrls ), should
2107  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
2108  * The function returns success if the control could
2109  * be added if required, or if it did nothing; in the future,
2110  * it might return some error if it failed.
2111  *
2112  * if no bind took place yet, but the connection is bound
2113  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
2114  * and explicitly add proxyAuthz the control to every operation
2115  * with the dn bound to the connection as control value.
2116  *
2117  * If no server-side controls are defined for the operation,
2118  * simply add the proxyAuthz control; otherwise, if the
2119  * proxyAuthz control is not already set, add it as
2120  * the first one
2121  *
2122  * FIXME: is controls order significant for security?
2123  * ANSWER: controls ordering and interoperability
2124  * must be indicated by the specs of each control; if none
2125  * is specified, the order is irrelevant.
2126  */
2127 int
2128 ldap_back_proxy_authz_ctrl(
2129                 struct berval   *bound_ndn,
2130                 int             version,
2131                 slap_idassert_t *si,
2132                 Operation       *op,
2133                 SlapReply       *rs,
2134                 LDAPControl     ***pctrls )
2135 {
2136         LDAPControl             **ctrls = NULL;
2137         int                     i = 0;
2138         slap_idassert_mode_t    mode;
2139         struct berval           assertedID,
2140                                 ndn;
2141         int                     isroot = 0;
2142
2143         *pctrls = NULL;
2144
2145         rs->sr_err = LDAP_SUCCESS;
2146
2147         /* don't proxyAuthz if protocol is not LDAPv3 */
2148         switch ( version ) {
2149         case LDAP_VERSION3:
2150                 break;
2151
2152         case 0:
2153                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
2154                         break;
2155                 }
2156                 /* fall thru */
2157
2158         default:
2159                 goto done;
2160         }
2161
2162         /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
2163          * but if it is not set this test fails.  We need a different
2164          * means to detect if idassert is enabled */
2165         if ( ( BER_BVISNULL( &si->si_bc.sb_authcId ) || BER_BVISEMPTY( &si->si_bc.sb_authcId ) )
2166                         && ( BER_BVISNULL( &si->si_bc.sb_binddn ) || BER_BVISEMPTY( &si->si_bc.sb_binddn ) ) )
2167         {
2168                 goto done;
2169         }
2170
2171         if ( !op->o_conn || op->o_do_not_cache || ( isroot = be_isroot( op ) ) ) {
2172                 goto done;
2173         }
2174
2175         if ( op->o_tag == LDAP_REQ_BIND ) {
2176                 ndn = op->o_req_ndn;
2177
2178         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2179                 ndn = op->o_conn->c_ndn;
2180
2181         } else {
2182                 ndn = op->o_ndn;
2183         }
2184
2185         if ( si->si_mode == LDAP_BACK_IDASSERT_LEGACY ) {
2186                 if ( op->o_proxy_authz ) {
2187                         /*
2188                          * FIXME: we do not want to perform proxyAuthz
2189                          * on behalf of the client, because this would
2190                          * be performed with "proxyauthzdn" privileges.
2191                          *
2192                          * This might actually be too strict, since
2193                          * the "proxyauthzdn" authzTo, and each entry's
2194                          * authzFrom attributes may be crafted
2195                          * to avoid unwanted proxyAuthz to take place.
2196                          */
2197 #if 0
2198                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2199                         rs->sr_text = "proxyAuthz not allowed within namingContext";
2200 #endif
2201                         goto done;
2202                 }
2203
2204                 if ( !BER_BVISNULL( bound_ndn ) ) {
2205                         goto done;
2206                 }
2207
2208                 if ( BER_BVISNULL( &ndn ) ) {
2209                         goto done;
2210                 }
2211
2212                 if ( BER_BVISNULL( &si->si_bc.sb_binddn ) ) {
2213                         goto done;
2214                 }
2215
2216         } else if ( si->si_bc.sb_method == LDAP_AUTH_SASL ) {
2217                 if ( ( si->si_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
2218                 {
2219                         /* already asserted in SASL via native authz */
2220                         goto done;
2221                 }
2222
2223         } else if ( si->si_authz && !isroot ) {
2224                 int             rc;
2225                 struct berval authcDN;
2226
2227                 if ( BER_BVISNULL( &ndn ) ) {
2228                         authcDN = slap_empty_bv;
2229                 } else {
2230                         authcDN = ndn;
2231                 }
2232                 rc = slap_sasl_matches( op, si->si_authz,
2233                                 &authcDN, & authcDN );
2234                 if ( rc != LDAP_SUCCESS ) {
2235                         if ( si->si_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2236                                 /* ndn is not authorized
2237                                  * to use idassert */
2238                                 rs->sr_err = rc;
2239                         }
2240                         goto done;
2241                 }
2242         }
2243
2244         if ( op->o_proxy_authz ) {
2245                 /*
2246                  * FIXME: we can:
2247                  * 1) ignore the already set proxyAuthz control
2248                  * 2) leave it in place, and don't set ours
2249                  * 3) add both
2250                  * 4) reject the operation
2251                  *
2252                  * option (4) is very drastic
2253                  * option (3) will make the remote server reject
2254                  * the operation, thus being equivalent to (4)
2255                  * option (2) will likely break the idassert
2256                  * assumptions, so we cannot accept it;
2257                  * option (1) means that we are contradicting
2258                  * the client's reques.
2259                  *
2260                  * I think (4) is the only correct choice.
2261                  */
2262                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2263                 rs->sr_text = "proxyAuthz not allowed within namingContext";
2264         }
2265
2266         if ( op->o_is_auth_check ) {
2267                 mode = LDAP_BACK_IDASSERT_NOASSERT;
2268
2269         } else {
2270                 mode = si->si_mode;
2271         }
2272
2273         switch ( mode ) {
2274         case LDAP_BACK_IDASSERT_LEGACY:
2275                 /* original behavior:
2276                  * assert the client's identity */
2277         case LDAP_BACK_IDASSERT_SELF:
2278                 assertedID = ndn;
2279                 break;
2280
2281         case LDAP_BACK_IDASSERT_ANONYMOUS:
2282                 /* assert "anonymous" */
2283                 assertedID = slap_empty_bv;
2284                 break;
2285
2286         case LDAP_BACK_IDASSERT_NOASSERT:
2287                 /* don't assert; bind as proxyauthzdn */
2288                 goto done;
2289
2290         case LDAP_BACK_IDASSERT_OTHERID:
2291         case LDAP_BACK_IDASSERT_OTHERDN:
2292                 /* assert idassert DN */
2293                 assertedID = si->si_bc.sb_authzId;
2294                 break;
2295
2296         default:
2297                 assert( 0 );
2298         }
2299
2300         /* if we got here, "" is allowed to proxyAuthz */
2301         if ( BER_BVISNULL( &assertedID ) ) {
2302                 assertedID = slap_empty_bv;
2303         }
2304
2305         /* don't idassert the bound DN (ITS#4497) */
2306         if ( dn_match( &assertedID, bound_ndn ) ) {
2307                 goto done;
2308         }
2309
2310         if ( op->o_ctrls ) {
2311                 for ( i = 0; op->o_ctrls[ i ]; i++ )
2312                         /* just count ctrls */ ;
2313         }
2314
2315         ctrls = op->o_tmpalloc( sizeof( LDAPControl * ) * (i + 2) + sizeof( LDAPControl ),
2316                         op->o_tmpmemctx );
2317         ctrls[ 0 ] = (LDAPControl *)&ctrls[ i + 2 ];
2318
2319         ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
2320         ctrls[ 0 ]->ldctl_iscritical = 1;
2321
2322         switch ( si->si_mode ) {
2323         /* already in u:ID or dn:DN form */
2324         case LDAP_BACK_IDASSERT_OTHERID:
2325         case LDAP_BACK_IDASSERT_OTHERDN:
2326                 ber_dupbv_x( &ctrls[ 0 ]->ldctl_value, &assertedID, op->o_tmpmemctx );
2327                 break;
2328
2329         /* needs the dn: prefix */
2330         default:
2331                 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
2332                 ctrls[ 0 ]->ldctl_value.bv_val = op->o_tmpalloc( ctrls[ 0 ]->ldctl_value.bv_len + 1,
2333                                 op->o_tmpmemctx );
2334                 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
2335                 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
2336                                 assertedID.bv_val, assertedID.bv_len + 1 );
2337                 break;
2338         }
2339
2340         /* Older versions of <draft-weltman-ldapv3-proxy> required
2341          * to encode the value of the authzID (and called it proxyDN);
2342          * this hack provides compatibility with those DSAs that
2343          * implement it this way */
2344         if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
2345                 struct berval           authzID = ctrls[ 0 ]->ldctl_value;
2346                 BerElementBuffer        berbuf;
2347                 BerElement              *ber = (BerElement *)&berbuf;
2348                 ber_tag_t               tag;
2349
2350                 ber_init2( ber, 0, LBER_USE_DER );
2351                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2352
2353                 tag = ber_printf( ber, "O", &authzID );
2354                 if ( tag == LBER_ERROR ) {
2355                         rs->sr_err = LDAP_OTHER;
2356                         goto free_ber;
2357                 }
2358
2359                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
2360                         rs->sr_err = LDAP_OTHER;
2361                         goto free_ber;
2362                 }
2363
2364 free_ber:;
2365                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2366                 ber_free_buf( ber );
2367
2368                 if ( rs->sr_err != LDAP_SUCCESS ) {
2369                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
2370                         ctrls = NULL;
2371                         goto done;
2372                 }
2373
2374         } else if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
2375                 struct berval           authzID = ctrls[ 0 ]->ldctl_value,
2376                                         tmp;
2377                 BerElementBuffer        berbuf;
2378                 BerElement              *ber = (BerElement *)&berbuf;
2379                 ber_tag_t               tag;
2380
2381                 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
2382                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
2383                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
2384                         ctrls = NULL;
2385                         rs->sr_err = LDAP_PROTOCOL_ERROR;
2386                         goto done;
2387                 }
2388
2389                 tmp = authzID;
2390                 tmp.bv_val += STRLENOF( "dn:" );
2391                 tmp.bv_len -= STRLENOF( "dn:" );
2392
2393                 ber_init2( ber, 0, LBER_USE_DER );
2394                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2395
2396                 /* apparently, Mozilla API encodes this
2397                  * as "SEQUENCE { LDAPDN }" */
2398                 tag = ber_printf( ber, "{O}", &tmp );
2399                 if ( tag == LBER_ERROR ) {
2400                         rs->sr_err = LDAP_OTHER;
2401                         goto free_ber2;
2402                 }
2403
2404                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
2405                         rs->sr_err = LDAP_OTHER;
2406                         goto free_ber2;
2407                 }
2408
2409 free_ber2:;
2410                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2411                 ber_free_buf( ber );
2412
2413                 if ( rs->sr_err != LDAP_SUCCESS ) {
2414                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
2415                         ctrls = NULL;
2416                         goto done;
2417                 }
2418
2419                 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
2420         }
2421
2422         if ( op->o_ctrls ) {
2423                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
2424                         ctrls[ i + 1 ] = op->o_ctrls[ i ];
2425                 }
2426         }
2427         ctrls[ i + 1 ] = NULL;
2428
2429 done:;
2430         if ( ctrls == NULL ) {
2431                 ctrls = op->o_ctrls;
2432         }
2433
2434         *pctrls = ctrls;
2435
2436         return rs->sr_err;
2437 }
2438
2439 int
2440 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
2441 {
2442         LDAPControl     **ctrls = *pctrls;
2443
2444         /* we assume that the first control is the proxyAuthz
2445          * added by back-ldap, so it's the only one we explicitly
2446          * free */
2447         if ( ctrls && ctrls != op->o_ctrls ) {
2448                 assert( ctrls[ 0 ] != NULL );
2449
2450                 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
2451                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
2452                 }
2453
2454                 op->o_tmpfree( ctrls, op->o_tmpmemctx );
2455         }
2456
2457         *pctrls = NULL;
2458
2459         return 0;
2460 }