1/* bind.c - ldap backend bind function */ 2/* $OpenLDAP$ */ 3/* This work is part of OpenLDAP Software <http://www.openldap.org/>. 4 * 5 * Copyright 1999-2011 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#include "lutil.h" 36#include "lutil_ldap.h" 37 38#define LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ "2.16.840.1.113730.3.4.12" 39 40#ifdef LDAP_DEVEL 41#define SLAP_AUTH_DN 1 42#endif 43 44#if LDAP_BACK_PRINT_CONNTREE > 0 45 46static const struct { 47 slap_mask_t f; 48 char c; 49} flagsmap[] = { 50 { LDAP_BACK_FCONN_ISBOUND, 'B' }, 51 { LDAP_BACK_FCONN_ISANON, 'A' }, 52 { LDAP_BACK_FCONN_ISPRIV, 'P' }, 53 { LDAP_BACK_FCONN_ISTLS, 'T' }, 54 { LDAP_BACK_FCONN_BINDING, 'X' }, 55 { LDAP_BACK_FCONN_TAINTED, 'E' }, 56 { LDAP_BACK_FCONN_ABANDON, 'N' }, 57 { LDAP_BACK_FCONN_ISIDASR, 'S' }, 58 { LDAP_BACK_FCONN_CACHED, 'C' }, 59 { 0, '\0' } 60}; 61 62static void 63ldap_back_conn_print( ldapconn_t *lc, const char *avlstr ) 64{ 65 char buf[ SLAP_TEXT_BUFLEN ]; 66 char fbuf[ sizeof("BAPTIENSC") ]; 67 int i; 68 69 ldap_back_conn2str( &lc->lc_base, buf, sizeof( buf ) ); 70 for ( i = 0; flagsmap[ i ].c != '\0'; i++ ) { 71 if ( lc->lc_lcflags & flagsmap[i].f ) { 72 fbuf[i] = flagsmap[i].c; 73 74 } else { 75 fbuf[i] = '.'; 76 } 77 } 78 fbuf[i] = '\0'; 79 80 fprintf( stderr, "lc=%p %s %s flags=0x%08x (%s)\n", 81 (void *)lc, buf, avlstr, lc->lc_lcflags, fbuf ); 82} 83 84static void 85ldap_back_ravl_print( Avlnode *root, int depth ) 86{ 87 int i; 88 ldapconn_t *lc; 89 90 if ( root == 0 ) { 91 return; 92 } 93 94 ldap_back_ravl_print( root->avl_right, depth+1 ); 95 96 for ( i = 0; i < depth; i++ ) { 97 fprintf( stderr, "-" ); 98 } 99 100 lc = root->avl_data; 101 ldap_back_conn_print( lc, avl_bf2str( root->avl_bf ) ); 102 103 ldap_back_ravl_print( root->avl_left, depth + 1 ); 104} 105 106static char* priv2str[] = { 107 "privileged", 108 "privileged/TLS", 109 "anonymous", 110 "anonymous/TLS", 111 "bind", 112 "bind/TLS", 113 NULL 114}; 115 116void 117ldap_back_print_conntree( ldapinfo_t *li, char *msg ) 118{ 119 int c; 120 121 fprintf( stderr, "========> %s\n", msg ); 122 123 for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) { 124 int i = 0; 125 ldapconn_t *lc; 126 127 fprintf( stderr, " %s[%d]\n", priv2str[ c ], li->li_conn_priv[ c ].lic_num ); 128 129 LDAP_TAILQ_FOREACH( lc, &li->li_conn_priv[ c ].lic_priv, lc_q ) 130 { 131 fprintf( stderr, " [%d] ", i ); 132 ldap_back_conn_print( lc, "" ); 133 i++; 134 } 135 } 136 137 if ( li->li_conninfo.lai_tree == 0 ) { 138 fprintf( stderr, "\t(empty)\n" ); 139 140 } else { 141 ldap_back_ravl_print( li->li_conninfo.lai_tree, 0 ); 142 } 143 144 fprintf( stderr, "<======== %s\n", msg ); 145} 146#endif /* LDAP_BACK_PRINT_CONNTREE */ 147 148static int 149ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock ); 150 151static ldapconn_t * 152ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok, 153 struct berval *binddn, struct berval *bindcred ); 154 155static int 156ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok, 157 struct berval *binddn, struct berval *bindcred ); 158 159static int 160ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs, 161 ldap_back_send_t sendok, struct berval *binddn, struct berval *bindcred ); 162 163static int 164ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs, 165 ldap_back_send_t sendok ); 166 167static int 168ldap_back_conndnlc_cmp( const void *c1, const void *c2 ); 169 170ldapconn_t * 171ldap_back_conn_delete( ldapinfo_t *li, ldapconn_t *lc ) 172{ 173 if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) { 174 if ( LDAP_BACK_CONN_CACHED( lc ) ) { 175 assert( lc->lc_q.tqe_prev != NULL ); 176 assert( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num > 0 ); 177 li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num--; 178 LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q ); 179 LDAP_TAILQ_ENTRY_INIT( lc, lc_q ); 180 LDAP_BACK_CONN_CACHED_CLEAR( lc ); 181 182 } else { 183 assert( LDAP_BACK_CONN_TAINTED( lc ) ); 184 assert( lc->lc_q.tqe_prev == NULL ); 185 } 186 187 } else { 188 ldapconn_t *tmplc = NULL; 189 190 if ( LDAP_BACK_CONN_CACHED( lc ) ) { 191 assert( !LDAP_BACK_CONN_TAINTED( lc ) ); 192 tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, 193 ldap_back_conndnlc_cmp ); 194 assert( tmplc == lc ); 195 LDAP_BACK_CONN_CACHED_CLEAR( lc ); 196 } 197 198 assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc ); 199 } 200 201 return lc; 202} 203 204int 205ldap_back_bind( Operation *op, SlapReply *rs ) 206{ 207 ldapinfo_t *li = (ldapinfo_t *) op->o_bd->be_private; 208 ldapconn_t *lc; 209 210 LDAPControl **ctrls = NULL; 211 struct berval save_o_dn; 212 int save_o_do_not_cache, 213 rc = 0; 214 ber_int_t msgid; 215 ldap_back_send_t retrying = LDAP_BACK_RETRYING; 216 217 /* allow rootdn as a means to auth without the need to actually 218 * contact the proxied DSA */ 219 switch ( be_rootdn_bind( op, rs ) ) { 220 case SLAP_CB_CONTINUE: 221 break; 222 223 default: 224 return rs->sr_err; 225 } 226 227 lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR, NULL, NULL ); 228 if ( !lc ) { 229 return rs->sr_err; 230 } 231 232 /* we can do (almost) whatever we want with this conn, 233 * because either it's temporary, or it's marked as binding */ 234 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) { 235 ch_free( lc->lc_bound_ndn.bv_val ); 236 BER_BVZERO( &lc->lc_bound_ndn ); 237 } 238 if ( !BER_BVISNULL( &lc->lc_cred ) ) { 239 memset( lc->lc_cred.bv_val, 0, lc->lc_cred.bv_len ); 240 ch_free( lc->lc_cred.bv_val ); 241 BER_BVZERO( &lc->lc_cred ); 242 } 243 LDAP_BACK_CONN_ISBOUND_CLEAR( lc ); 244 245 /* don't add proxyAuthz; set the bindDN */ 246 save_o_dn = op->o_dn; 247 save_o_do_not_cache = op->o_do_not_cache; 248 op->o_dn = op->o_req_dn; 249 op->o_do_not_cache = 1; 250 251 ctrls = op->o_ctrls; 252 rc = ldap_back_controls_add( op, rs, lc, &ctrls ); 253 op->o_dn = save_o_dn; 254 op->o_do_not_cache = save_o_do_not_cache; 255 if ( rc != LDAP_SUCCESS ) { 256 send_ldap_result( op, rs ); 257 ldap_back_release_conn( li, lc ); 258 return( rc ); 259 } 260 261retry:; 262 /* method is always LDAP_AUTH_SIMPLE if we got here */ 263 rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val, 264 LDAP_SASL_SIMPLE, 265 &op->orb_cred, ctrls, NULL, &msgid ); 266 /* FIXME: should we always retry, or only when piping the bind 267 * in the "override" connection pool? */ 268 rc = ldap_back_op_result( lc, op, rs, msgid, 269 li->li_timeout[ SLAP_OP_BIND ], 270 LDAP_BACK_BIND_SERR | retrying ); 271 if ( rc == LDAP_UNAVAILABLE && retrying ) { 272 retrying &= ~LDAP_BACK_RETRYING; 273 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_BIND_SERR ) ) { 274 goto retry; 275 } 276 } 277 278 ldap_back_controls_free( op, rs, &ctrls ); 279 280 if ( rc == LDAP_SUCCESS ) { 281 op->o_conn->c_authz_cookie = op->o_bd->be_private; 282 283 /* If defined, proxyAuthz will be used also when 284 * back-ldap is the authorizing backend; for this 285 * purpose, after a successful bind the connection 286 * is left for further binds, and further operations 287 * on this client connection will use a default 288 * connection with identity assertion */ 289 /* NOTE: use with care */ 290 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) { 291 ldap_back_release_conn( li, lc ); 292 return( rc ); 293 } 294 295 /* rebind is now done inside ldap_back_proxy_authz_bind() 296 * in case of success */ 297 LDAP_BACK_CONN_ISBOUND_SET( lc ); 298 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn ); 299 300 if ( !BER_BVISNULL( &lc->lc_cred ) ) { 301 memset( lc->lc_cred.bv_val, 0, 302 lc->lc_cred.bv_len ); 303 } 304 305 if ( LDAP_BACK_SAVECRED( li ) ) { 306 ber_bvreplace( &lc->lc_cred, &op->orb_cred ); 307 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc ); 308 309 } else { 310 lc->lc_cred.bv_len = 0; 311 } 312 } 313 314 /* must re-insert if local DN changed as result of bind */ 315 if ( !LDAP_BACK_CONN_ISBOUND( lc ) 316 || ( !dn_match( &op->o_req_ndn, &lc->lc_local_ndn ) 317 && !LDAP_BACK_PCONN_ISPRIV( lc ) ) ) 318 { 319 int lerr = -1; 320 ldapconn_t *tmplc; 321 322 /* wait for all other ops to release the connection */ 323retry_lock:; 324 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 325 if ( lc->lc_refcnt > 1 ) { 326 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 327 ldap_pvt_thread_yield(); 328 goto retry_lock; 329 } 330 331#if LDAP_BACK_PRINT_CONNTREE > 0 332 ldap_back_print_conntree( li, ">>> ldap_back_bind" ); 333#endif /* LDAP_BACK_PRINT_CONNTREE */ 334 335 assert( lc->lc_refcnt == 1 ); 336 ldap_back_conn_delete( li, lc ); 337 338 /* delete all cached connections with the current connection */ 339 if ( LDAP_BACK_SINGLECONN( li ) ) { 340 while ( ( tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, ldap_back_conn_cmp ) ) != NULL ) 341 { 342 assert( !LDAP_BACK_PCONN_ISPRIV( lc ) ); 343 Debug( LDAP_DEBUG_TRACE, 344 "=>ldap_back_bind: destroying conn %lu (refcnt=%u)\n", 345 lc->lc_conn->c_connid, lc->lc_refcnt, 0 ); 346 347 if ( tmplc->lc_refcnt != 0 ) { 348 /* taint it */ 349 LDAP_BACK_CONN_TAINTED_SET( tmplc ); 350 LDAP_BACK_CONN_CACHED_CLEAR( tmplc ); 351 352 } else { 353 /* 354 * Needs a test because the handler may be corrupted, 355 * and calling ldap_unbind on a corrupted header results 356 * in a segmentation fault 357 */ 358 ldap_back_conn_free( tmplc ); 359 } 360 } 361 } 362 363 if ( LDAP_BACK_CONN_ISBOUND( lc ) ) { 364 ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn ); 365 if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) { 366 LDAP_BACK_PCONN_ROOTDN_SET( lc, op ); 367 } 368 lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc, 369 ldap_back_conndn_cmp, ldap_back_conndn_dup ); 370 } 371 372#if LDAP_BACK_PRINT_CONNTREE > 0 373 ldap_back_print_conntree( li, "<<< ldap_back_bind" ); 374#endif /* LDAP_BACK_PRINT_CONNTREE */ 375 376 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 377 switch ( lerr ) { 378 case 0: 379 LDAP_BACK_CONN_CACHED_SET( lc ); 380 break; 381 382 case -1: 383 /* duplicate; someone else successfully bound 384 * on the same connection with the same identity; 385 * we can do this because lc_refcnt == 1 */ 386 ldap_back_conn_free( lc ); 387 lc = NULL; 388 } 389 } 390 391 if ( lc != NULL ) { 392 ldap_back_release_conn( li, lc ); 393 } 394 395 return( rc ); 396} 397 398/* 399 * ldap_back_conndn_cmp 400 * 401 * compares two ldapconn_t based on the value of the conn pointer 402 * and of the local DN; used by avl stuff for insert, lookup 403 * and direct delete 404 */ 405int 406ldap_back_conndn_cmp( const void *c1, const void *c2 ) 407{ 408 const ldapconn_t *lc1 = (const ldapconn_t *)c1; 409 const ldapconn_t *lc2 = (const ldapconn_t *)c2; 410 int rc; 411 412 /* If local DNs don't match, it is definitely not a match */ 413 /* For shared sessions, conn is NULL. Only explicitly 414 * bound sessions will have non-NULL conn. 415 */ 416 rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn ); 417 if ( rc == 0 ) { 418 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn ); 419 } 420 421 return rc; 422} 423 424/* 425 * ldap_back_conndnlc_cmp 426 * 427 * compares two ldapconn_t based on the value of the conn pointer, 428 * the local DN and the lc pointer; used by avl stuff for insert, lookup 429 * and direct delete 430 */ 431static int 432ldap_back_conndnlc_cmp( const void *c1, const void *c2 ) 433{ 434 const ldapconn_t *lc1 = (const ldapconn_t *)c1; 435 const ldapconn_t *lc2 = (const ldapconn_t *)c2; 436 int rc; 437 438 /* If local DNs don't match, it is definitely not a match */ 439 /* For shared sessions, conn is NULL. Only explicitly 440 * bound sessions will have non-NULL conn. 441 */ 442 rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn ); 443 if ( rc == 0 ) { 444 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn ); 445 if ( rc == 0 ) { 446 rc = SLAP_PTRCMP( lc1, lc2 ); 447 } 448 } 449 450 return rc; 451} 452 453/* 454 * ldap_back_conn_cmp 455 * 456 * compares two ldapconn_t based on the value of the conn pointer; 457 * used by avl stuff for delete of all conns with the same connid 458 */ 459int 460ldap_back_conn_cmp( const void *c1, const void *c2 ) 461{ 462 const ldapconn_t *lc1 = (const ldapconn_t *)c1; 463 const ldapconn_t *lc2 = (const ldapconn_t *)c2; 464 465 /* For shared sessions, conn is NULL. Only explicitly 466 * bound sessions will have non-NULL conn. 467 */ 468 return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn ); 469} 470 471/* 472 * ldap_back_conndn_dup 473 * 474 * returns -1 in case a duplicate ldapconn_t has been inserted; 475 * used by avl stuff 476 */ 477int 478ldap_back_conndn_dup( void *c1, void *c2 ) 479{ 480 ldapconn_t *lc1 = (ldapconn_t *)c1; 481 ldapconn_t *lc2 = (ldapconn_t *)c2; 482 483 /* Cannot have more than one shared session with same DN */ 484 if ( lc1->lc_conn == lc2->lc_conn && 485 dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) ) 486 { 487 return -1; 488 } 489 490 return 0; 491} 492 493static int 494ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock ) 495{ 496 if ( dolock ) { 497 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 498 } 499 500#if LDAP_BACK_PRINT_CONNTREE > 0 501 ldap_back_print_conntree( li, ">>> ldap_back_freeconn" ); 502#endif /* LDAP_BACK_PRINT_CONNTREE */ 503 504 (void)ldap_back_conn_delete( li, lc ); 505 506 if ( lc->lc_refcnt == 0 ) { 507 ldap_back_conn_free( (void *)lc ); 508 } 509 510#if LDAP_BACK_PRINT_CONNTREE > 0 511 ldap_back_print_conntree( li, "<<< ldap_back_freeconn" ); 512#endif /* LDAP_BACK_PRINT_CONNTREE */ 513 514 if ( dolock ) { 515 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 516 } 517 518 return 0; 519} 520 521#ifdef HAVE_TLS 522static int 523ldap_back_start_tls( 524 LDAP *ld, 525 int protocol, 526 int *is_tls, 527 const char *url, 528 unsigned flags, 529 int retries, 530 const char **text ) 531{ 532 int rc = LDAP_SUCCESS; 533 534 /* start TLS ("tls-[try-]{start,propagate}" statements) */ 535 if ( ( LDAP_BACK_USE_TLS_F( flags ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS_F( flags ) ) ) 536 && !ldap_is_ldaps_url( url ) ) 537 { 538#ifdef SLAP_STARTTLS_ASYNCHRONOUS 539 /* 540 * use asynchronous StartTLS 541 * in case, chase referral (not implemented yet) 542 */ 543 int msgid; 544 545 if ( protocol == 0 ) { 546 ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION, 547 (void *)&protocol ); 548 } 549 550 if ( protocol < LDAP_VERSION3 ) { 551 /* we should rather bail out... */ 552 rc = LDAP_UNWILLING_TO_PERFORM; 553 *text = "invalid protocol version"; 554 } 555 556 if ( rc == LDAP_SUCCESS ) { 557 rc = ldap_start_tls( ld, NULL, NULL, &msgid ); 558 } 559 560 if ( rc == LDAP_SUCCESS ) { 561 LDAPMessage *res = NULL; 562 struct timeval tv; 563 564 LDAP_BACK_TV_SET( &tv ); 565 566retry:; 567 rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res ); 568 if ( rc < 0 ) { 569 rc = LDAP_UNAVAILABLE; 570 571 } else if ( rc == 0 ) { 572 if ( retries != LDAP_BACK_RETRY_NEVER ) { 573 ldap_pvt_thread_yield(); 574 if ( retries > 0 ) { 575 retries--; 576 } 577 LDAP_BACK_TV_SET( &tv ); 578 goto retry; 579 } 580 rc = LDAP_UNAVAILABLE; 581 582 } else if ( rc == LDAP_RES_EXTENDED ) { 583 struct berval *data = NULL; 584 585 rc = ldap_parse_extended_result( ld, res, 586 NULL, &data, 0 ); 587 if ( rc == LDAP_SUCCESS ) { 588 SlapReply rs; 589 rc = ldap_parse_result( ld, res, &rs.sr_err, 590 NULL, NULL, NULL, NULL, 1 ); 591 if ( rc != LDAP_SUCCESS ) { 592 rs.sr_err = rc; 593 } 594 rc = slap_map_api2result( &rs ); 595 res = NULL; 596 597 /* FIXME: in case a referral 598 * is returned, should we try 599 * using it instead of the 600 * configured URI? */ 601 if ( rc == LDAP_SUCCESS ) { 602 rc = ldap_install_tls( ld ); 603 604 } else if ( rc == LDAP_REFERRAL ) { 605 rc = LDAP_UNWILLING_TO_PERFORM; 606 *text = "unwilling to chase referral returned by Start TLS exop"; 607 } 608 609 if ( data ) { 610 if ( data->bv_val ) { 611 ber_memfree( data->bv_val ); 612 } 613 ber_memfree( data ); 614 } 615 } 616 617 } else { 618 rc = LDAP_OTHER; 619 } 620 621 if ( res != NULL ) { 622 ldap_msgfree( res ); 623 } 624 } 625#else /* ! SLAP_STARTTLS_ASYNCHRONOUS */ 626 /* 627 * use synchronous StartTLS 628 */ 629 rc = ldap_start_tls_s( ld, NULL, NULL ); 630#endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */ 631 632 /* if StartTLS is requested, only attempt it if the URL 633 * is not "ldaps://"; this may occur not only in case 634 * of misconfiguration, but also when used in the chain 635 * overlay, where the "uri" can be parsed out of a referral */ 636 switch ( rc ) { 637 case LDAP_SUCCESS: 638 *is_tls = 1; 639 break; 640 641 case LDAP_SERVER_DOWN: 642 break; 643 644 default: 645 if ( LDAP_BACK_TLS_CRITICAL_F( flags ) ) { 646 *text = "could not start TLS"; 647 break; 648 } 649 650 /* in case Start TLS is not critical */ 651 *is_tls = 0; 652 rc = LDAP_SUCCESS; 653 break; 654 } 655 656 } else { 657 *is_tls = 0; 658 } 659 660 return rc; 661} 662#endif /* HAVE_TLS */ 663 664static int 665ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok ) 666{ 667 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 668 int version; 669 LDAP *ld = NULL; 670#ifdef HAVE_TLS 671 int is_tls = op->o_conn->c_is_tls; 672 int flags = li->li_flags; 673 time_t lctime = (time_t)(-1); 674 slap_bindconf *sb; 675#endif /* HAVE_TLS */ 676 677 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex ); 678 rs->sr_err = ldap_initialize( &ld, li->li_uri ); 679 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex ); 680 if ( rs->sr_err != LDAP_SUCCESS ) { 681 goto error_return; 682 } 683 684 if ( li->li_urllist_f ) { 685 ldap_set_urllist_proc( ld, li->li_urllist_f, li->li_urllist_p ); 686 } 687 688 /* Set LDAP version. This will always succeed: If the client 689 * bound with a particular version, then so can we. 690 */ 691 if ( li->li_version != 0 ) { 692 version = li->li_version; 693 694 } else if ( op->o_protocol != 0 ) { 695 version = op->o_protocol; 696 697 } else { 698 /* assume it's an internal op; set to LDAPv3 */ 699 version = LDAP_VERSION3; 700 } 701 ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version ); 702 703 /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */ 704 ldap_set_option( ld, LDAP_OPT_REFERRALS, 705 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF ); 706 707 if ( li->li_network_timeout > 0 ) { 708 struct timeval tv; 709 710 tv.tv_sec = li->li_network_timeout; 711 tv.tv_usec = 0; 712 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv ); 713 } 714 715#ifdef HAVE_TLS 716 if ( LDAP_BACK_CONN_ISPRIV( lc ) ) { 717 /* See "rationale" comment in ldap_back_getconn() */ 718 if ( li->li_acl_authmethod == LDAP_AUTH_NONE && 719 li->li_idassert_authmethod != LDAP_AUTH_NONE ) 720 sb = &li->li_idassert.si_bc; 721 else 722 sb = &li->li_acl; 723 724 } else if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) { 725 sb = &li->li_idassert.si_bc; 726 727 } else { 728 sb = &li->li_tls; 729 } 730 731 if ( sb->sb_tls_do_init ) { 732 bindconf_tls_set( sb, ld ); 733 } else if ( sb->sb_tls_ctx ) { 734 ldap_set_option( ld, LDAP_OPT_X_TLS_CTX, sb->sb_tls_ctx ); 735 } 736 737 /* if required by the bindconf configuration, force TLS */ 738 if ( ( sb == &li->li_acl || sb == &li->li_idassert.si_bc ) && 739 sb->sb_tls_ctx ) 740 { 741 flags |= LDAP_BACK_F_USE_TLS; 742 } 743 744 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex ); 745 assert( li->li_uri_mutex_do_not_lock == 0 ); 746 li->li_uri_mutex_do_not_lock = 1; 747 rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls, 748 li->li_uri, flags, li->li_nretries, &rs->sr_text ); 749 li->li_uri_mutex_do_not_lock = 0; 750 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex ); 751 if ( rs->sr_err != LDAP_SUCCESS ) { 752 ldap_unbind_ext( ld, NULL, NULL ); 753 rs->sr_text = "Start TLS failed"; 754 goto error_return; 755 756 } else if ( li->li_idle_timeout ) { 757 /* only touch when activity actually took place... */ 758 lctime = op->o_time; 759 } 760#endif /* HAVE_TLS */ 761 762 lc->lc_ld = ld; 763 lc->lc_refcnt = 1; 764#ifdef HAVE_TLS 765 if ( is_tls ) { 766 LDAP_BACK_CONN_ISTLS_SET( lc ); 767 } else { 768 LDAP_BACK_CONN_ISTLS_CLEAR( lc ); 769 } 770 if ( lctime != (time_t)(-1) ) { 771 lc->lc_time = lctime; 772 } 773#endif /* HAVE_TLS */ 774 775error_return:; 776 if ( rs->sr_err != LDAP_SUCCESS ) { 777 rs->sr_err = slap_map_api2result( rs ); 778 if ( sendok & LDAP_BACK_SENDERR ) { 779 if ( rs->sr_text == NULL ) { 780 rs->sr_text = "Proxy connection initialization failed"; 781 } 782 send_ldap_result( op, rs ); 783 } 784 785 } else { 786 if ( li->li_conn_ttl > 0 ) { 787 lc->lc_create_time = op->o_time; 788 } 789 } 790 791 return rs->sr_err; 792} 793 794static ldapconn_t * 795ldap_back_getconn( 796 Operation *op, 797 SlapReply *rs, 798 ldap_back_send_t sendok, 799 struct berval *binddn, 800 struct berval *bindcred ) 801{ 802 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 803 ldapconn_t *lc = NULL, 804 lc_curr = {{ 0 }}; 805 int refcnt = 1, 806 lookupconn = !( sendok & LDAP_BACK_BINDING ); 807 808 /* if the server is quarantined, and 809 * - the current interval did not expire yet, or 810 * - no more retries should occur, 811 * don't return the connection */ 812 if ( li->li_isquarantined ) { 813 slap_retry_info_t *ri = &li->li_quarantine; 814 int dont_retry = 1; 815 816 if ( li->li_quarantine.ri_interval ) { 817 ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex ); 818 if ( li->li_isquarantined == LDAP_BACK_FQ_YES ) { 819 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL 820 || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] ); 821 if ( !dont_retry ) { 822 Debug( LDAP_DEBUG_ANY, 823 "%s: ldap_back_getconn quarantine " 824 "retry block #%d try #%d.\n", 825 op->o_log_prefix, ri->ri_idx, ri->ri_count ); 826 li->li_isquarantined = LDAP_BACK_FQ_RETRYING; 827 } 828 } 829 ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex ); 830 } 831 832 if ( dont_retry ) { 833 rs->sr_err = LDAP_UNAVAILABLE; 834 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) { 835 rs->sr_text = "Target is quarantined"; 836 send_ldap_result( op, rs ); 837 } 838 return NULL; 839 } 840 } 841 842 /* Internal searches are privileged and shared. So is root. */ 843 if ( op->o_do_not_cache || be_isroot( op ) ) { 844 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr ); 845 lc_curr.lc_local_ndn = op->o_bd->be_rootndn; 846 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op ); 847 848 } else { 849 struct berval tmpbinddn, 850 tmpbindcred, 851 save_o_dn, 852 save_o_ndn; 853 int isproxyauthz; 854 855 /* need cleanup */ 856 if ( binddn == NULL ) { 857 binddn = &tmpbinddn; 858 } 859 if ( bindcred == NULL ) { 860 bindcred = &tmpbindcred; 861 } 862 if ( op->o_tag == LDAP_REQ_BIND ) { 863 save_o_dn = op->o_dn; 864 save_o_ndn = op->o_ndn; 865 op->o_dn = op->o_req_dn; 866 op->o_ndn = op->o_req_ndn; 867 } 868 isproxyauthz = ldap_back_is_proxy_authz( op, rs, sendok, binddn, bindcred ); 869 if ( op->o_tag == LDAP_REQ_BIND ) { 870 op->o_dn = save_o_dn; 871 op->o_ndn = save_o_ndn; 872 } 873 if ( isproxyauthz == -1 ) { 874 return NULL; 875 } 876 877 lc_curr.lc_local_ndn = op->o_ndn; 878 /* Explicit binds must not be shared; 879 * however, explicit binds are piped in a special connection 880 * when idassert is to occur with "override" set */ 881 if ( op->o_tag == LDAP_REQ_BIND && !isproxyauthz ) { 882 lc_curr.lc_conn = op->o_conn; 883 884 } else { 885 if ( isproxyauthz && !( sendok & LDAP_BACK_BINDING ) ) { 886 lc_curr.lc_local_ndn = *binddn; 887 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op ); 888 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr ); 889 890 } else if ( isproxyauthz && ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) { 891 lc_curr.lc_local_ndn = slap_empty_bv; 892 LDAP_BACK_PCONN_BIND_SET( &lc_curr, op ); 893 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr ); 894 lookupconn = 1; 895 896 } else if ( SLAP_IS_AUTHZ_BACKEND( op ) ) { 897 lc_curr.lc_conn = op->o_conn; 898 899 } else { 900 LDAP_BACK_PCONN_ANON_SET( &lc_curr, op ); 901 } 902 } 903 } 904 905 /* Explicit Bind requests always get their own conn */ 906 if ( lookupconn ) { 907retry_lock: 908 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 909 if ( LDAP_BACK_PCONN_ISPRIV( &lc_curr ) ) { 910 /* lookup a conn that's not binding */ 911 LDAP_TAILQ_FOREACH( lc, 912 &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv, 913 lc_q ) 914 { 915 if ( !LDAP_BACK_CONN_BINDING( lc ) && lc->lc_refcnt == 0 ) { 916 break; 917 } 918 } 919 920 if ( lc != NULL ) { 921 if ( lc != LDAP_TAILQ_LAST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, 922 ldapconn_t, lc_q ) ) 923 { 924 LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, 925 lc, lc_q ); 926 LDAP_TAILQ_ENTRY_INIT( lc, lc_q ); 927 LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, 928 lc, lc_q ); 929 } 930 931 } else if ( !LDAP_BACK_USE_TEMPORARIES( li ) 932 && li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_num == li->li_conn_priv_max ) 933 { 934 lc = LDAP_TAILQ_FIRST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv ); 935 } 936 937 } else { 938 939 /* Searches for a ldapconn in the avl tree */ 940 lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree, 941 (caddr_t)&lc_curr, ldap_back_conndn_cmp ); 942 } 943 944 if ( lc != NULL ) { 945 /* Don't reuse connections while they're still binding */ 946 if ( LDAP_BACK_CONN_BINDING( lc ) ) { 947 if ( !LDAP_BACK_USE_TEMPORARIES( li ) ) { 948 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 949 950 ldap_pvt_thread_yield(); 951 goto retry_lock; 952 } 953 lc = NULL; 954 } 955 956 if ( lc != NULL ) { 957 if ( op->o_tag == LDAP_REQ_BIND ) { 958 /* right now, this is the only possible case */ 959 assert( ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ); 960 LDAP_BACK_CONN_BINDING_SET( lc ); 961 } 962 963 refcnt = ++lc->lc_refcnt; 964 } 965 } 966 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 967 } 968 969 /* Looks like we didn't get a bind. Open a new session... */ 970 if ( lc == NULL ) { 971 lc = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) ); 972 lc->lc_flags = li->li_flags; 973 lc->lc_lcflags = lc_curr.lc_lcflags; 974 if ( ldap_back_prepare_conn( lc, op, rs, sendok ) != LDAP_SUCCESS ) { 975 ch_free( lc ); 976 return NULL; 977 } 978 979 if ( sendok & LDAP_BACK_BINDING ) { 980 LDAP_BACK_CONN_BINDING_SET( lc ); 981 } 982 983 lc->lc_conn = lc_curr.lc_conn; 984 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn ); 985 986 /* 987 * the rationale is: connections as the rootdn are privileged, 988 * so li_acl is to be used; however, in some cases 989 * one already configured identity assertion with a highly 990 * privileged idassert_authcDN, so if li_acl is not configured 991 * and idassert is, use idassert instead. 992 * 993 * might change in the future, because it's preferable 994 * to make clear what identity is being used, since 995 * the only drawback is that one risks to configure 996 * the same identity twice... 997 */ 998 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) { 999 if ( li->li_acl_authmethod == LDAP_AUTH_NONE && 1000 li->li_idassert_authmethod != LDAP_AUTH_NONE ) { 1001 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN ); 1002 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd ); 1003 1004 } else { 1005 ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN ); 1006 ber_dupbv( &lc->lc_cred, &li->li_acl_passwd ); 1007 } 1008 LDAP_BACK_CONN_ISPRIV_SET( lc ); 1009 1010 } else if ( LDAP_BACK_CONN_ISIDASSERT( &lc_curr ) ) { 1011 if ( !LDAP_BACK_PCONN_ISBIND( &lc_curr ) ) { 1012 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN ); 1013 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd ); 1014 } 1015 LDAP_BACK_CONN_ISIDASSERT_SET( lc ); 1016 1017 } else { 1018 BER_BVZERO( &lc->lc_cred ); 1019 BER_BVZERO( &lc->lc_bound_ndn ); 1020 if ( !BER_BVISEMPTY( &op->o_ndn ) 1021 && SLAP_IS_AUTHZ_BACKEND( op ) ) 1022 { 1023 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn ); 1024 } 1025 } 1026 1027#ifdef HAVE_TLS 1028 /* if start TLS failed but it was not mandatory, 1029 * check if the non-TLS connection was already 1030 * in cache; in case, destroy the newly created 1031 * connection and use the existing one */ 1032 if ( LDAP_BACK_PCONN_ISTLS( lc ) 1033 && !ldap_tls_inplace( lc->lc_ld ) ) 1034 { 1035 ldapconn_t *tmplc = NULL; 1036 int idx = LDAP_BACK_CONN2PRIV( &lc_curr ) - 1; 1037 1038 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 1039 LDAP_TAILQ_FOREACH( tmplc, 1040 &li->li_conn_priv[ idx ].lic_priv, 1041 lc_q ) 1042 { 1043 if ( !LDAP_BACK_CONN_BINDING( tmplc ) ) { 1044 break; 1045 } 1046 } 1047 1048 if ( tmplc != NULL ) { 1049 refcnt = ++tmplc->lc_refcnt; 1050 ldap_back_conn_free( lc ); 1051 lc = tmplc; 1052 } 1053 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 1054 1055 if ( tmplc != NULL ) { 1056 goto done; 1057 } 1058 } 1059#endif /* HAVE_TLS */ 1060 1061 /* Inserts the newly created ldapconn in the avl tree */ 1062 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 1063 1064 LDAP_BACK_CONN_ISBOUND_CLEAR( lc ); 1065 1066 assert( lc->lc_refcnt == 1 ); 1067 1068#if LDAP_BACK_PRINT_CONNTREE > 0 1069 ldap_back_print_conntree( li, ">>> ldap_back_getconn(insert)" ); 1070#endif /* LDAP_BACK_PRINT_CONNTREE */ 1071 1072 if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) { 1073 if ( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num < li->li_conn_priv_max ) { 1074 LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q ); 1075 li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num++; 1076 LDAP_BACK_CONN_CACHED_SET( lc ); 1077 1078 } else { 1079 LDAP_BACK_CONN_TAINTED_SET( lc ); 1080 } 1081 rs->sr_err = 0; 1082 1083 } else { 1084 rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc, 1085 ldap_back_conndn_cmp, ldap_back_conndn_dup ); 1086 LDAP_BACK_CONN_CACHED_SET( lc ); 1087 } 1088 1089#if LDAP_BACK_PRINT_CONNTREE > 0 1090 ldap_back_print_conntree( li, "<<< ldap_back_getconn(insert)" ); 1091#endif /* LDAP_BACK_PRINT_CONNTREE */ 1092 1093 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 1094 1095 if ( LogTest( LDAP_DEBUG_TRACE ) ) { 1096 char buf[ SLAP_TEXT_BUFLEN ]; 1097 1098 snprintf( buf, sizeof( buf ), 1099 "lc=%p inserted refcnt=%u rc=%d", 1100 (void *)lc, refcnt, rs->sr_err ); 1101 1102 Debug( LDAP_DEBUG_TRACE, 1103 "=>ldap_back_getconn: %s: %s\n", 1104 op->o_log_prefix, buf, 0 ); 1105 } 1106 1107 if ( !LDAP_BACK_PCONN_ISPRIV( lc ) ) { 1108 /* Err could be -1 in case a duplicate ldapconn is inserted */ 1109 switch ( rs->sr_err ) { 1110 case 0: 1111 break; 1112 1113 case -1: 1114 LDAP_BACK_CONN_CACHED_CLEAR( lc ); 1115 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( li ) ) { 1116 /* duplicate: free and try to get the newly created one */ 1117 ldap_back_conn_free( lc ); 1118 lc = NULL; 1119 goto retry_lock; 1120 } 1121 1122 /* taint connection, so that it'll be freed when released */ 1123 LDAP_BACK_CONN_TAINTED_SET( lc ); 1124 break; 1125 1126 default: 1127 LDAP_BACK_CONN_CACHED_CLEAR( lc ); 1128 ldap_back_conn_free( lc ); 1129 rs->sr_err = LDAP_OTHER; 1130 rs->sr_text = "Proxy bind collision"; 1131 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) { 1132 send_ldap_result( op, rs ); 1133 } 1134 return NULL; 1135 } 1136 } 1137 1138 } else { 1139 int expiring = 0; 1140 1141 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout ) 1142 || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) ) 1143 { 1144 expiring = 1; 1145 1146 /* let it be used, but taint/delete it so that 1147 * no-one else can look it up any further */ 1148 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 1149 1150#if LDAP_BACK_PRINT_CONNTREE > 0 1151 ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" ); 1152#endif /* LDAP_BACK_PRINT_CONNTREE */ 1153 1154 (void)ldap_back_conn_delete( li, lc ); 1155 LDAP_BACK_CONN_TAINTED_SET( lc ); 1156 1157#if LDAP_BACK_PRINT_CONNTREE > 0 1158 ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" ); 1159#endif /* LDAP_BACK_PRINT_CONNTREE */ 1160 1161 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 1162 } 1163 1164 if ( LogTest( LDAP_DEBUG_TRACE ) ) { 1165 char buf[ SLAP_TEXT_BUFLEN ]; 1166 1167 snprintf( buf, sizeof( buf ), 1168 "conn %p fetched refcnt=%u%s", 1169 (void *)lc, refcnt, 1170 expiring ? " expiring" : "" ); 1171 Debug( LDAP_DEBUG_TRACE, 1172 "=>ldap_back_getconn: %s.\n", buf, 0, 0 ); 1173 } 1174 } 1175 1176#ifdef HAVE_TLS 1177done:; 1178#endif /* HAVE_TLS */ 1179 1180 return lc; 1181} 1182 1183void 1184ldap_back_release_conn_lock( 1185 ldapinfo_t *li, 1186 ldapconn_t **lcp, 1187 int dolock ) 1188{ 1189 1190 ldapconn_t *lc = *lcp; 1191 1192 if ( dolock ) { 1193 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 1194 } 1195 assert( lc->lc_refcnt > 0 ); 1196 LDAP_BACK_CONN_BINDING_CLEAR( lc ); 1197 lc->lc_refcnt--; 1198 if ( LDAP_BACK_CONN_TAINTED( lc ) ) { 1199 ldap_back_freeconn( li, lc, 0 ); 1200 *lcp = NULL; 1201 } 1202 if ( dolock ) { 1203 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 1204 } 1205} 1206 1207void 1208ldap_back_quarantine( 1209 Operation *op, 1210 SlapReply *rs ) 1211{ 1212 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 1213 1214 slap_retry_info_t *ri = &li->li_quarantine; 1215 1216 ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex ); 1217 1218 if ( rs->sr_err == LDAP_UNAVAILABLE ) { 1219 time_t new_last = slap_get_time(); 1220 1221 switch ( li->li_isquarantined ) { 1222 case LDAP_BACK_FQ_NO: 1223 if ( ri->ri_last == new_last ) { 1224 goto done; 1225 } 1226 1227 Debug( LDAP_DEBUG_ANY, 1228 "%s: ldap_back_quarantine enter.\n", 1229 op->o_log_prefix, 0, 0 ); 1230 1231 ri->ri_idx = 0; 1232 ri->ri_count = 0; 1233 break; 1234 1235 case LDAP_BACK_FQ_RETRYING: 1236 Debug( LDAP_DEBUG_ANY, 1237 "%s: ldap_back_quarantine block #%d try #%d failed.\n", 1238 op->o_log_prefix, ri->ri_idx, ri->ri_count ); 1239 1240 ++ri->ri_count; 1241 if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER 1242 && ri->ri_count == ri->ri_num[ ri->ri_idx ] ) 1243 { 1244 ri->ri_count = 0; 1245 ++ri->ri_idx; 1246 } 1247 break; 1248 1249 default: 1250 break; 1251 } 1252 1253 li->li_isquarantined = LDAP_BACK_FQ_YES; 1254 ri->ri_last = new_last; 1255 1256 } else if ( li->li_isquarantined != LDAP_BACK_FQ_NO ) { 1257 if ( ri->ri_last == slap_get_time() ) { 1258 goto done; 1259 } 1260 1261 Debug( LDAP_DEBUG_ANY, 1262 "%s: ldap_back_quarantine exit (%d) err=%d.\n", 1263 op->o_log_prefix, li->li_isquarantined, rs->sr_err ); 1264 1265 if ( li->li_quarantine_f ) { 1266 (void)li->li_quarantine_f( li, li->li_quarantine_p ); 1267 } 1268 1269 ri->ri_count = 0; 1270 ri->ri_idx = 0; 1271 li->li_isquarantined = LDAP_BACK_FQ_NO; 1272 } 1273 1274done:; 1275 ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex ); 1276} 1277 1278static int 1279ldap_back_dobind_cb( 1280 Operation *op, 1281 SlapReply *rs 1282) 1283{ 1284 ber_tag_t *tptr = op->o_callback->sc_private; 1285 op->o_tag = *tptr; 1286 rs->sr_tag = slap_req2res( op->o_tag ); 1287 1288 return SLAP_CB_CONTINUE; 1289} 1290 1291/* 1292 * ldap_back_dobind_int 1293 * 1294 * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not 1295 */ 1296static int 1297ldap_back_dobind_int( 1298 ldapconn_t **lcp, 1299 Operation *op, 1300 SlapReply *rs, 1301 ldap_back_send_t sendok, 1302 int retries, 1303 int dolock ) 1304{ 1305 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 1306 1307 ldapconn_t *lc; 1308 struct berval binddn = slap_empty_bv, 1309 bindcred = slap_empty_bv; 1310 1311 int rc = 0, 1312 isbound, 1313 binding = 0; 1314 ber_int_t msgid; 1315 ber_tag_t o_tag = op->o_tag; 1316 slap_callback cb = {0}; 1317 char *tmp_dn; 1318 1319 assert( lcp != NULL ); 1320 assert( retries >= 0 ); 1321 1322 if ( sendok & LDAP_BACK_GETCONN ) { 1323 assert( *lcp == NULL ); 1324 1325 lc = ldap_back_getconn( op, rs, sendok, &binddn, &bindcred ); 1326 if ( lc == NULL ) { 1327 return 0; 1328 } 1329 *lcp = lc; 1330 1331 } else { 1332 lc = *lcp; 1333 } 1334 1335 assert( lc != NULL ); 1336 1337retry_lock:; 1338 if ( dolock ) { 1339 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 1340 } 1341 1342 if ( binding == 0 ) { 1343 /* check if already bound */ 1344 rc = isbound = LDAP_BACK_CONN_ISBOUND( lc ); 1345 if ( isbound ) { 1346 if ( dolock ) { 1347 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 1348 } 1349 return rc; 1350 } 1351 1352 if ( LDAP_BACK_CONN_BINDING( lc ) ) { 1353 /* if someone else is about to bind it, give up and retry */ 1354 if ( dolock ) { 1355 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 1356 } 1357 ldap_pvt_thread_yield(); 1358 goto retry_lock; 1359 1360 } else { 1361 /* otherwise this thread will bind it */ 1362 LDAP_BACK_CONN_BINDING_SET( lc ); 1363 binding = 1; 1364 } 1365 } 1366 1367 if ( dolock ) { 1368 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 1369 } 1370 1371 /* 1372 * FIXME: we need to let clients use proxyAuthz 1373 * otherwise we cannot do symmetric pools of servers; 1374 * we have to live with the fact that a user can 1375 * authorize itself as any ID that is allowed 1376 * by the authzTo directive of the "proxyauthzdn". 1377 */ 1378 /* 1379 * NOTE: current Proxy Authorization specification 1380 * and implementation do not allow proxy authorization 1381 * control to be provided with Bind requests 1382 */ 1383 /* 1384 * if no bind took place yet, but the connection is bound 1385 * and the "idassert-authcDN" (or other ID) is set, 1386 * then bind as the asserting identity and explicitly 1387 * add the proxyAuthz control to every operation with the 1388 * dn bound to the connection as control value. 1389 * This is done also if this is the authorizing backend, 1390 * but the "override" flag is given to idassert. 1391 * It allows to use SASL bind and yet proxyAuthz users 1392 */ 1393 op->o_tag = LDAP_REQ_BIND; 1394 cb.sc_next = op->o_callback; 1395 cb.sc_private = &o_tag; 1396 cb.sc_response = ldap_back_dobind_cb; 1397 op->o_callback = &cb; 1398 1399 if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) { 1400 if ( BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &bindcred ) ) { 1401 /* if we got here, it shouldn't return result */ 1402 rc = ldap_back_is_proxy_authz( op, rs, 1403 LDAP_BACK_DONTSEND, &binddn, &bindcred ); 1404 assert( rc == 1 ); 1405 } 1406 rc = ldap_back_proxy_authz_bind( lc, op, rs, sendok, &binddn, &bindcred ); 1407 goto done; 1408 } 1409 1410#ifdef HAVE_CYRUS_SASL 1411 if ( LDAP_BACK_CONN_ISPRIV( lc )) { 1412 slap_bindconf *sb; 1413 if ( li->li_acl_authmethod != LDAP_AUTH_NONE ) 1414 sb = &li->li_acl; 1415 else 1416 sb = &li->li_idassert.si_bc; 1417 1418 if ( sb->sb_method == LDAP_AUTH_SASL ) { 1419 void *defaults = NULL; 1420 1421 if ( sb->sb_secprops != NULL ) { 1422 rc = ldap_set_option( lc->lc_ld, 1423 LDAP_OPT_X_SASL_SECPROPS, sb->sb_secprops ); 1424 1425 if ( rc != LDAP_OPT_SUCCESS ) { 1426 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option " 1427 "(SECPROPS,\"%s\") failed!\n", 1428 sb->sb_secprops, 0, 0 ); 1429 goto done; 1430 } 1431 } 1432 1433 defaults = lutil_sasl_defaults( lc->lc_ld, 1434 sb->sb_saslmech.bv_val, 1435 sb->sb_realm.bv_val, 1436 sb->sb_authcId.bv_val, 1437 sb->sb_cred.bv_val, 1438 NULL ); 1439 if ( defaults == NULL ) { 1440 rs->sr_err = LDAP_OTHER; 1441 LDAP_BACK_CONN_ISBOUND_CLEAR( lc ); 1442 if ( sendok & LDAP_BACK_SENDERR ) { 1443 send_ldap_result( op, rs ); 1444 } 1445 goto done; 1446 } 1447 1448 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, 1449 sb->sb_binddn.bv_val, 1450 sb->sb_saslmech.bv_val, NULL, NULL, 1451 LDAP_SASL_QUIET, lutil_sasl_interact, 1452 defaults ); 1453 1454 lutil_sasl_freedefs( defaults ); 1455 1456 switch ( rs->sr_err ) { 1457 case LDAP_SUCCESS: 1458 LDAP_BACK_CONN_ISBOUND_SET( lc ); 1459 break; 1460 1461 case LDAP_LOCAL_ERROR: 1462 /* list client API error codes that require 1463 * to taint the connection */ 1464 /* FIXME: should actually retry? */ 1465 LDAP_BACK_CONN_TAINTED_SET( lc ); 1466 1467 /* fallthru */ 1468 1469 default: 1470 LDAP_BACK_CONN_ISBOUND_CLEAR( lc ); 1471 rs->sr_err = slap_map_api2result( rs ); 1472 if ( sendok & LDAP_BACK_SENDERR ) { 1473 send_ldap_result( op, rs ); 1474 } 1475 break; 1476 } 1477 1478 if ( LDAP_BACK_QUARANTINE( li ) ) { 1479 ldap_back_quarantine( op, rs ); 1480 } 1481 1482 goto done; 1483 } 1484 } 1485#endif /* HAVE_CYRUS_SASL */ 1486 1487retry:; 1488 if ( BER_BVISNULL( &lc->lc_cred ) ) { 1489 tmp_dn = ""; 1490 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) && !BER_BVISEMPTY( &lc->lc_bound_ndn ) ) { 1491 Debug( LDAP_DEBUG_ANY, "%s ldap_back_dobind_int: DN=\"%s\" without creds, binding anonymously", 1492 op->o_log_prefix, lc->lc_bound_ndn.bv_val, 0 ); 1493 } 1494 1495 } else { 1496 tmp_dn = lc->lc_bound_ndn.bv_val; 1497 } 1498 rs->sr_err = ldap_sasl_bind( lc->lc_ld, 1499 tmp_dn, 1500 LDAP_SASL_SIMPLE, &lc->lc_cred, 1501 NULL, NULL, &msgid ); 1502 1503 if ( rs->sr_err == LDAP_SERVER_DOWN ) { 1504 if ( retries != LDAP_BACK_RETRY_NEVER ) { 1505 if ( dolock ) { 1506 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 1507 } 1508 1509 assert( lc->lc_refcnt > 0 ); 1510 if ( lc->lc_refcnt == 1 ) { 1511 ldap_unbind_ext( lc->lc_ld, NULL, NULL ); 1512 lc->lc_ld = NULL; 1513 1514 /* lc here must be the regular lc, reset and ready for init */ 1515 rs->sr_err = ldap_back_prepare_conn( lc, op, rs, sendok ); 1516 if ( rs->sr_err != LDAP_SUCCESS ) { 1517 sendok &= ~LDAP_BACK_SENDERR; 1518 lc->lc_refcnt = 0; 1519 } 1520 } 1521 1522 if ( dolock ) { 1523 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 1524 } 1525 1526 if ( rs->sr_err == LDAP_SUCCESS ) { 1527 if ( retries > 0 ) { 1528 retries--; 1529 } 1530 goto retry; 1531 } 1532 } 1533 1534 assert( lc->lc_refcnt == 1 ); 1535 lc->lc_refcnt = 0; 1536 ldap_back_freeconn( li, lc, dolock ); 1537 *lcp = NULL; 1538 rs->sr_err = slap_map_api2result( rs ); 1539 1540 if ( LDAP_BACK_QUARANTINE( li ) ) { 1541 ldap_back_quarantine( op, rs ); 1542 } 1543 1544 if ( rs->sr_err != LDAP_SUCCESS && 1545 ( sendok & LDAP_BACK_SENDERR ) ) 1546 { 1547 if ( op->o_callback == &cb ) 1548 op->o_callback = cb.sc_next; 1549 op->o_tag = o_tag; 1550 rs->sr_text = "Proxy can't contact remote server"; 1551 send_ldap_result( op, rs ); 1552 } 1553 1554 rc = 0; 1555 goto func_leave; 1556 } 1557 1558 rc = ldap_back_op_result( lc, op, rs, msgid, 1559 -1, ( sendok | LDAP_BACK_BINDING ) ); 1560 if ( rc == LDAP_SUCCESS ) { 1561 op->o_conn->c_authz_cookie = op->o_bd->be_private; 1562 LDAP_BACK_CONN_ISBOUND_SET( lc ); 1563 } 1564 1565done:; 1566 LDAP_BACK_CONN_BINDING_CLEAR( lc ); 1567 rc = LDAP_BACK_CONN_ISBOUND( lc ); 1568 if ( !rc ) { 1569 ldap_back_release_conn_lock( li, lcp, dolock ); 1570 1571 } else if ( LDAP_BACK_SAVECRED( li ) ) { 1572 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc ); 1573 } 1574 1575func_leave:; 1576 if ( op->o_callback == &cb ) 1577 op->o_callback = cb.sc_next; 1578 op->o_tag = o_tag; 1579 1580 return rc; 1581} 1582 1583/* 1584 * ldap_back_dobind 1585 * 1586 * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not 1587 */ 1588int 1589ldap_back_dobind( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok ) 1590{ 1591 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 1592 1593 return ldap_back_dobind_int( lcp, op, rs, 1594 ( sendok | LDAP_BACK_GETCONN ), li->li_nretries, 1 ); 1595} 1596 1597/* 1598 * ldap_back_default_rebind 1599 * 1600 * This is a callback used for chasing referrals using the same 1601 * credentials as the original user on this session. 1602 */ 1603int 1604ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request, 1605 ber_int_t msgid, void *params ) 1606{ 1607 ldapconn_t *lc = (ldapconn_t *)params; 1608 1609#ifdef HAVE_TLS 1610 /* ... otherwise we couldn't get here */ 1611 assert( lc != NULL ); 1612 1613 if ( !ldap_tls_inplace( ld ) ) { 1614 int is_tls = LDAP_BACK_CONN_ISTLS( lc ), 1615 rc; 1616 const char *text = NULL; 1617 1618 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags, 1619 LDAP_BACK_RETRY_DEFAULT, &text ); 1620 if ( rc != LDAP_SUCCESS ) { 1621 return rc; 1622 } 1623 } 1624#endif /* HAVE_TLS */ 1625 1626 /* FIXME: add checks on the URL/identity? */ 1627 1628 return ldap_sasl_bind_s( ld, 1629 BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val, 1630 LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL ); 1631} 1632 1633/* 1634 * ldap_back_default_urllist 1635 */ 1636int 1637ldap_back_default_urllist( 1638 LDAP *ld, 1639 LDAPURLDesc **urllist, 1640 LDAPURLDesc **url, 1641 void *params ) 1642{ 1643 ldapinfo_t *li = (ldapinfo_t *)params; 1644 LDAPURLDesc **urltail; 1645 1646 if ( urllist == url ) { 1647 return LDAP_SUCCESS; 1648 } 1649 1650 for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next ) 1651 /* count */ ; 1652 1653 *urltail = *urllist; 1654 *urllist = *url; 1655 *url = NULL; 1656 1657 if ( !li->li_uri_mutex_do_not_lock ) { 1658 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex ); 1659 } 1660 1661 if ( li->li_uri ) { 1662 ch_free( li->li_uri ); 1663 } 1664 1665 ldap_get_option( ld, LDAP_OPT_URI, (void *)&li->li_uri ); 1666 1667 if ( !li->li_uri_mutex_do_not_lock ) { 1668 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex ); 1669 } 1670 1671 return LDAP_SUCCESS; 1672} 1673 1674int 1675ldap_back_cancel( 1676 ldapconn_t *lc, 1677 Operation *op, 1678 SlapReply *rs, 1679 ber_int_t msgid, 1680 ldap_back_send_t sendok ) 1681{ 1682 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 1683 1684 /* default behavior */ 1685 if ( LDAP_BACK_ABANDON( li ) ) { 1686 return ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL ); 1687 } 1688 1689 if ( LDAP_BACK_IGNORE( li ) ) { 1690 return ldap_pvt_discard( lc->lc_ld, msgid ); 1691 } 1692 1693 if ( LDAP_BACK_CANCEL( li ) ) { 1694 /* FIXME: asynchronous? */ 1695 return ldap_cancel_s( lc->lc_ld, msgid, NULL, NULL ); 1696 } 1697 1698 assert( 0 ); 1699 1700 return LDAP_OTHER; 1701} 1702 1703int 1704ldap_back_op_result( 1705 ldapconn_t *lc, 1706 Operation *op, 1707 SlapReply *rs, 1708 ber_int_t msgid, 1709 time_t timeout, 1710 ldap_back_send_t sendok ) 1711{ 1712 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 1713 1714 char *match = NULL; 1715 char *text = NULL; 1716 char **refs = NULL; 1717 LDAPControl **ctrls = NULL; 1718 1719 rs->sr_text = NULL; 1720 rs->sr_matched = NULL; 1721 rs->sr_ref = NULL; 1722 rs->sr_ctrls = NULL; 1723 1724 /* if the error recorded in the reply corresponds 1725 * to a successful state, get the error from the 1726 * remote server response */ 1727 if ( LDAP_ERR_OK( rs->sr_err ) ) { 1728 int rc; 1729 struct timeval tv; 1730 LDAPMessage *res = NULL; 1731 time_t stoptime = (time_t)(-1); 1732 int timeout_err = op->o_protocol >= LDAP_VERSION3 ? 1733 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER; 1734 const char *timeout_text = "Operation timed out"; 1735 1736 /* if timeout is not specified, compute and use 1737 * the one specific to the ongoing operation */ 1738 if ( timeout == (time_t)(-1) ) { 1739 slap_op_t opidx = slap_req2op( op->o_tag ); 1740 1741 if ( opidx == SLAP_OP_SEARCH ) { 1742 if ( op->ors_tlimit <= 0 ) { 1743 timeout = 0; 1744 1745 } else { 1746 timeout = op->ors_tlimit; 1747 timeout_err = LDAP_TIMELIMIT_EXCEEDED; 1748 timeout_text = NULL; 1749 } 1750 1751 } else { 1752 timeout = li->li_timeout[ opidx ]; 1753 } 1754 } 1755 1756 /* better than nothing :) */ 1757 if ( timeout == 0 ) { 1758 if ( li->li_idle_timeout ) { 1759 timeout = li->li_idle_timeout; 1760 1761 } else if ( li->li_conn_ttl ) { 1762 timeout = li->li_conn_ttl; 1763 } 1764 } 1765 1766 if ( timeout ) { 1767 stoptime = op->o_time + timeout; 1768 } 1769 1770 LDAP_BACK_TV_SET( &tv ); 1771 1772retry:; 1773 /* if result parsing fails, note the failure reason */ 1774 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res ); 1775 switch ( rc ) { 1776 case 0: 1777 if ( timeout && slap_get_time() > stoptime ) { 1778 if ( sendok & LDAP_BACK_BINDING ) { 1779 ldap_unbind_ext( lc->lc_ld, NULL, NULL ); 1780 lc->lc_ld = NULL; 1781 1782 /* let it be used, but taint/delete it so that 1783 * no-one else can look it up any further */ 1784 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 1785 1786#if LDAP_BACK_PRINT_CONNTREE > 0 1787 ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" ); 1788#endif /* LDAP_BACK_PRINT_CONNTREE */ 1789 1790 (void)ldap_back_conn_delete( li, lc ); 1791 LDAP_BACK_CONN_TAINTED_SET( lc ); 1792 1793#if LDAP_BACK_PRINT_CONNTREE > 0 1794 ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" ); 1795#endif /* LDAP_BACK_PRINT_CONNTREE */ 1796 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 1797 1798 } else { 1799 (void)ldap_back_cancel( lc, op, rs, msgid, sendok ); 1800 } 1801 rs->sr_err = timeout_err; 1802 rs->sr_text = timeout_text; 1803 break; 1804 } 1805 1806 /* timeout == 0 */ 1807 LDAP_BACK_TV_SET( &tv ); 1808 ldap_pvt_thread_yield(); 1809 goto retry; 1810 1811 case -1: 1812 ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER, 1813 &rs->sr_err ); 1814 break; 1815 1816 1817 /* otherwise get the result; if it is not 1818 * LDAP_SUCCESS, record it in the reply 1819 * structure (this includes 1820 * LDAP_COMPARE_{TRUE|FALSE}) */ 1821 default: 1822 /* only touch when activity actually took place... */ 1823 if ( li->li_idle_timeout && lc ) { 1824 lc->lc_time = op->o_time; 1825 } 1826 1827 rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err, 1828 &match, &text, &refs, &ctrls, 1 ); 1829 if ( rc == LDAP_SUCCESS ) { 1830 rs->sr_text = text; 1831 } else { 1832 rs->sr_err = rc; 1833 } 1834 rs->sr_err = slap_map_api2result( rs ); 1835 1836 /* RFC 4511: referrals can only appear 1837 * if result code is LDAP_REFERRAL */ 1838 if ( refs != NULL 1839 && refs[ 0 ] != NULL 1840 && refs[ 0 ][ 0 ] != '\0' ) 1841 { 1842 if ( rs->sr_err != LDAP_REFERRAL ) { 1843 Debug( LDAP_DEBUG_ANY, 1844 "%s ldap_back_op_result: " 1845 "got referrals with err=%d\n", 1846 op->o_log_prefix, 1847 rs->sr_err, 0 ); 1848 1849 } else { 1850 int i; 1851 1852 for ( i = 0; refs[ i ] != NULL; i++ ) 1853 /* count */ ; 1854 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ), 1855 op->o_tmpmemctx ); 1856 for ( i = 0; refs[ i ] != NULL; i++ ) { 1857 ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] ); 1858 } 1859 BER_BVZERO( &rs->sr_ref[ i ] ); 1860 } 1861 1862 } else if ( rs->sr_err == LDAP_REFERRAL ) { 1863 Debug( LDAP_DEBUG_ANY, 1864 "%s ldap_back_op_result: " 1865 "got err=%d with null " 1866 "or empty referrals\n", 1867 op->o_log_prefix, 1868 rs->sr_err, 0 ); 1869 1870 rs->sr_err = LDAP_NO_SUCH_OBJECT; 1871 } 1872 1873 if ( ctrls != NULL ) { 1874 rs->sr_ctrls = ctrls; 1875 } 1876 } 1877 } 1878 1879 /* if the error in the reply structure is not 1880 * LDAP_SUCCESS, try to map it from client 1881 * to server error */ 1882 if ( !LDAP_ERR_OK( rs->sr_err ) ) { 1883 rs->sr_err = slap_map_api2result( rs ); 1884 1885 /* internal ops ( op->o_conn == NULL ) 1886 * must not reply to client */ 1887 if ( op->o_conn && !op->o_do_not_cache && match ) { 1888 1889 /* record the (massaged) matched 1890 * DN into the reply structure */ 1891 rs->sr_matched = match; 1892 } 1893 } 1894 1895 if ( rs->sr_err == LDAP_UNAVAILABLE ) { 1896 if ( !( sendok & LDAP_BACK_RETRYING ) ) { 1897 if ( LDAP_BACK_QUARANTINE( li ) ) { 1898 ldap_back_quarantine( op, rs ); 1899 } 1900 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) { 1901 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed"; 1902 send_ldap_result( op, rs ); 1903 } 1904 } 1905 1906 } else if ( op->o_conn && 1907 ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) ) 1908 || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) ) 1909 { 1910 send_ldap_result( op, rs ); 1911 } 1912 1913 if ( text ) { 1914 ldap_memfree( text ); 1915 } 1916 rs->sr_text = NULL; 1917 1918 /* there can't be refs with a (successful) bind */ 1919 if ( rs->sr_ref ) { 1920 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx ); 1921 rs->sr_ref = NULL; 1922 } 1923 1924 if ( refs ) { 1925 ber_memvfree( (void **)refs ); 1926 } 1927 1928 /* match should not be possible with a successful bind */ 1929 if ( match ) { 1930 if ( rs->sr_matched != match ) { 1931 free( (char *)rs->sr_matched ); 1932 } 1933 rs->sr_matched = NULL; 1934 ldap_memfree( match ); 1935 } 1936 1937 if ( ctrls != NULL ) { 1938 if ( op->o_tag == LDAP_REQ_BIND && rs->sr_err == LDAP_SUCCESS ) { 1939 int i; 1940 1941 for ( i = 0; ctrls[i] != NULL; i++ ); 1942 1943 rs->sr_ctrls = op->o_tmpalloc( sizeof( LDAPControl * )*( i + 1 ), 1944 op->o_tmpmemctx ); 1945 for ( i = 0; ctrls[ i ] != NULL; i++ ) { 1946 char *ptr; 1947 ber_len_t oidlen = strlen( ctrls[i]->ldctl_oid ); 1948 ber_len_t size = sizeof( LDAPControl ) 1949 + oidlen + 1 1950 + ctrls[i]->ldctl_value.bv_len + 1; 1951 1952 rs->sr_ctrls[ i ] = op->o_tmpalloc( size, op->o_tmpmemctx ); 1953 rs->sr_ctrls[ i ]->ldctl_oid = (char *)&rs->sr_ctrls[ i ][ 1 ]; 1954 lutil_strcopy( rs->sr_ctrls[ i ]->ldctl_oid, ctrls[i]->ldctl_oid ); 1955 rs->sr_ctrls[ i ]->ldctl_value.bv_val 1956 = (char *)&rs->sr_ctrls[ i ]->ldctl_oid[oidlen + 1]; 1957 rs->sr_ctrls[ i ]->ldctl_value.bv_len 1958 = ctrls[i]->ldctl_value.bv_len; 1959 ptr = lutil_memcopy( rs->sr_ctrls[ i ]->ldctl_value.bv_val, 1960 ctrls[i]->ldctl_value.bv_val, ctrls[i]->ldctl_value.bv_len ); 1961 *ptr = '\0'; 1962 } 1963 rs->sr_ctrls[ i ] = NULL; 1964 rs->sr_flags |= REP_CTRLS_MUSTBEFREED; 1965 1966 } else { 1967 assert( rs->sr_ctrls != NULL ); 1968 rs->sr_ctrls = NULL; 1969 } 1970 1971 ldap_controls_free( ctrls ); 1972 } 1973 1974 return( LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err ); 1975} 1976 1977/* return true if bound, false if failed */ 1978int 1979ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok ) 1980{ 1981 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 1982 int rc = 0; 1983 1984 assert( lcp != NULL ); 1985 assert( *lcp != NULL ); 1986 1987 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex ); 1988 1989 if ( (*lcp)->lc_refcnt == 1 ) { 1990 int binding = LDAP_BACK_CONN_BINDING( *lcp ); 1991 1992 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex ); 1993 Debug( LDAP_DEBUG_ANY, 1994 "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n", 1995 op->o_log_prefix, li->li_uri, 1996 BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ? 1997 "" : (*lcp)->lc_bound_ndn.bv_val ); 1998 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex ); 1999 2000 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL ); 2001 (*lcp)->lc_ld = NULL; 2002 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) ); 2003 2004 /* lc here must be the regular lc, reset and ready for init */ 2005 rc = ldap_back_prepare_conn( *lcp, op, rs, sendok ); 2006 if ( rc != LDAP_SUCCESS ) { 2007 /* freeit, because lc_refcnt == 1 */ 2008 (*lcp)->lc_refcnt = 0; 2009 (void)ldap_back_freeconn( li, *lcp, 0 ); 2010 *lcp = NULL; 2011 rc = 0; 2012 2013 } else if ( ( sendok & LDAP_BACK_BINDING ) ) { 2014 if ( binding ) { 2015 LDAP_BACK_CONN_BINDING_SET( *lcp ); 2016 } 2017 rc = 1; 2018 2019 } else { 2020 rc = ldap_back_dobind_int( lcp, op, rs, sendok, 0, 0 ); 2021 if ( rc == 0 && *lcp != NULL ) { 2022 /* freeit, because lc_refcnt == 1 */ 2023 (*lcp)->lc_refcnt = 0; 2024 LDAP_BACK_CONN_TAINTED_SET( *lcp ); 2025 (void)ldap_back_freeconn( li, *lcp, 0 ); 2026 *lcp = NULL; 2027 } 2028 } 2029 2030 } else { 2031 Debug( LDAP_DEBUG_TRACE, 2032 "ldap_back_retry: conn %p refcnt=%u unable to retry.\n", 2033 (void *)(*lcp), (*lcp)->lc_refcnt, 0 ); 2034 2035 LDAP_BACK_CONN_TAINTED_SET( *lcp ); 2036 ldap_back_release_conn_lock( li, lcp, 0 ); 2037 assert( *lcp == NULL ); 2038 2039 if ( sendok & LDAP_BACK_SENDERR ) { 2040 rs->sr_err = LDAP_UNAVAILABLE; 2041 rs->sr_text = "Unable to retry"; 2042 send_ldap_result( op, rs ); 2043 } 2044 } 2045 2046 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex ); 2047 2048 return rc; 2049} 2050 2051static int 2052ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok, 2053 struct berval *binddn, struct berval *bindcred ) 2054{ 2055 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 2056 struct berval ndn; 2057 int dobind = 0; 2058 2059 if ( op->o_conn == NULL || op->o_do_not_cache ) { 2060 goto done; 2061 } 2062 2063 /* don't proxyAuthz if protocol is not LDAPv3 */ 2064 switch ( li->li_version ) { 2065 case LDAP_VERSION3: 2066 break; 2067 2068 case 0: 2069 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) { 2070 break; 2071 } 2072 /* fall thru */ 2073 2074 default: 2075 rs->sr_err = LDAP_UNWILLING_TO_PERFORM; 2076 if ( sendok & LDAP_BACK_SENDERR ) { 2077 send_ldap_result( op, rs ); 2078 dobind = -1; 2079 } 2080 goto done; 2081 } 2082 2083 /* safe default */ 2084 *binddn = slap_empty_bv; 2085 *bindcred = slap_empty_bv; 2086 2087 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) { 2088 ndn = op->o_conn->c_ndn; 2089 2090 } else { 2091 ndn = op->o_ndn; 2092 } 2093 2094 switch ( li->li_idassert_mode ) { 2095 case LDAP_BACK_IDASSERT_LEGACY: 2096 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) { 2097 if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) ) 2098 { 2099 *binddn = li->li_idassert_authcDN; 2100 *bindcred = li->li_idassert_passwd; 2101 dobind = 1; 2102 } 2103 } 2104 break; 2105 2106 default: 2107 /* NOTE: rootdn can always idassert */ 2108 if ( BER_BVISNULL( &ndn ) 2109 && li->li_idassert_authz == NULL 2110 && !( li->li_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) ) 2111 { 2112 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) { 2113 rs->sr_err = LDAP_INAPPROPRIATE_AUTH; 2114 if ( sendok & LDAP_BACK_SENDERR ) { 2115 send_ldap_result( op, rs ); 2116 dobind = -1; 2117 } 2118 2119 } else { 2120 rs->sr_err = LDAP_SUCCESS; 2121 *binddn = slap_empty_bv; 2122 *bindcred = slap_empty_bv; 2123 break; 2124 } 2125 2126 goto done; 2127 2128 } else if ( !be_isroot( op ) ) { 2129 if ( li->li_idassert_passthru ) { 2130 struct berval authcDN; 2131 2132 if ( BER_BVISNULL( &ndn ) ) { 2133 authcDN = slap_empty_bv; 2134 2135 } else { 2136 authcDN = ndn; 2137 } 2138 rs->sr_err = slap_sasl_matches( op, li->li_idassert_passthru, 2139 &authcDN, &authcDN ); 2140 if ( rs->sr_err == LDAP_SUCCESS ) { 2141 dobind = 0; 2142 break; 2143 } 2144 } 2145 2146 if ( li->li_idassert_authz ) { 2147 struct berval authcDN; 2148 2149 if ( BER_BVISNULL( &ndn ) ) { 2150 authcDN = slap_empty_bv; 2151 2152 } else { 2153 authcDN = ndn; 2154 } 2155 rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz, 2156 &authcDN, &authcDN ); 2157 if ( rs->sr_err != LDAP_SUCCESS ) { 2158 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) { 2159 if ( sendok & LDAP_BACK_SENDERR ) { 2160 send_ldap_result( op, rs ); 2161 dobind = -1; 2162 } 2163 2164 } else { 2165 rs->sr_err = LDAP_SUCCESS; 2166 *binddn = slap_empty_bv; 2167 *bindcred = slap_empty_bv; 2168 break; 2169 } 2170 2171 goto done; 2172 } 2173 } 2174 } 2175 2176 *binddn = li->li_idassert_authcDN; 2177 *bindcred = li->li_idassert_passwd; 2178 dobind = 1; 2179 break; 2180 } 2181 2182done:; 2183 return dobind; 2184} 2185 2186static int 2187ldap_back_proxy_authz_bind( 2188 ldapconn_t *lc, 2189 Operation *op, 2190 SlapReply *rs, 2191 ldap_back_send_t sendok, 2192 struct berval *binddn, 2193 struct berval *bindcred ) 2194{ 2195 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 2196 struct berval ndn; 2197 int msgid; 2198 int rc; 2199 2200 if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) { 2201 ndn = op->o_conn->c_ndn; 2202 2203 } else { 2204 ndn = op->o_ndn; 2205 } 2206 2207 if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) { 2208#ifdef HAVE_CYRUS_SASL 2209 void *defaults = NULL; 2210 struct berval authzID = BER_BVNULL; 2211 int freeauthz = 0; 2212 LDAPControl **ctrlsp = NULL; 2213 LDAPMessage *result = NULL; 2214 const char *rmech = NULL; 2215 const char *save_text = rs->sr_text; 2216 2217#ifdef SLAP_AUTH_DN 2218 LDAPControl ctrl, *ctrls[2]; 2219 int msgid; 2220#endif /* SLAP_AUTH_DN */ 2221 2222 /* if SASL supports native authz, prepare for it */ 2223 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) && 2224 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) ) 2225 { 2226 switch ( li->li_idassert_mode ) { 2227 case LDAP_BACK_IDASSERT_OTHERID: 2228 case LDAP_BACK_IDASSERT_OTHERDN: 2229 authzID = li->li_idassert_authzID; 2230 break; 2231 2232 case LDAP_BACK_IDASSERT_ANONYMOUS: 2233 BER_BVSTR( &authzID, "dn:" ); 2234 break; 2235 2236 case LDAP_BACK_IDASSERT_SELF: 2237 if ( BER_BVISNULL( &ndn ) ) { 2238 /* connection is not authc'd, so don't idassert */ 2239 BER_BVSTR( &authzID, "dn:" ); 2240 break; 2241 } 2242 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len; 2243 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx ); 2244 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ); 2245 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ), 2246 ndn.bv_val, ndn.bv_len + 1 ); 2247 freeauthz = 1; 2248 break; 2249 2250 default: 2251 break; 2252 } 2253 } 2254 2255 if ( li->li_idassert_secprops != NULL ) { 2256 rs->sr_err = ldap_set_option( lc->lc_ld, 2257 LDAP_OPT_X_SASL_SECPROPS, 2258 (void *)li->li_idassert_secprops ); 2259 2260 if ( rs->sr_err != LDAP_OPT_SUCCESS ) { 2261 rs->sr_err = LDAP_OTHER; 2262 if ( sendok & LDAP_BACK_SENDERR ) { 2263 send_ldap_result( op, rs ); 2264 } 2265 LDAP_BACK_CONN_ISBOUND_CLEAR( lc ); 2266 goto done; 2267 } 2268 } 2269 2270 defaults = lutil_sasl_defaults( lc->lc_ld, 2271 li->li_idassert_sasl_mech.bv_val, 2272 li->li_idassert_sasl_realm.bv_val, 2273 li->li_idassert_authcID.bv_val, 2274 li->li_idassert_passwd.bv_val, 2275 authzID.bv_val ); 2276 if ( defaults == NULL ) { 2277 rs->sr_err = LDAP_OTHER; 2278 LDAP_BACK_CONN_ISBOUND_CLEAR( lc ); 2279 if ( sendok & LDAP_BACK_SENDERR ) { 2280 send_ldap_result( op, rs ); 2281 } 2282 goto done; 2283 } 2284 2285#ifdef SLAP_AUTH_DN 2286 if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) { 2287 assert( BER_BVISNULL( binddn ) ); 2288 2289 ctrl.ldctl_oid = LDAP_CONTROL_AUTHZID_REQUEST; 2290 ctrl.ldctl_iscritical = 0; 2291 BER_BVZERO( &ctrl.ldctl_value ); 2292 ctrls[0] = &ctrl; 2293 ctrls[1] = NULL; 2294 ctrlsp = ctrls; 2295 } 2296#endif /* SLAP_AUTH_DN */ 2297 2298 do { 2299 rs->sr_err = ldap_sasl_interactive_bind( lc->lc_ld, binddn->bv_val, 2300 li->li_idassert_sasl_mech.bv_val, 2301 ctrlsp, NULL, LDAP_SASL_QUIET, lutil_sasl_interact, defaults, 2302 result, &rmech, &msgid ); 2303 2304 if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) 2305 break; 2306 2307 ldap_msgfree( result ); 2308 2309 if ( ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, NULL, &result ) == -1 || !result ) { 2310 ldap_get_option( lc->lc_ld, LDAP_OPT_RESULT_CODE, (void*)&rs->sr_err ); 2311 ldap_get_option( lc->lc_ld, LDAP_OPT_DIAGNOSTIC_MESSAGE, (void*)&rs->sr_text ); 2312 break; 2313 } 2314 } while ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS ); 2315 2316 switch ( rs->sr_err ) { 2317 case LDAP_SUCCESS: 2318#ifdef SLAP_AUTH_DN 2319 /* FIXME: right now, the only reason to check 2320 * response controls is RFC 3829 authzid */ 2321 if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) { 2322 ctrlsp = NULL; 2323 rc = ldap_parse_result( lc->lc_ld, result, NULL, NULL, NULL, NULL, 2324 &ctrlsp, 0 ); 2325 if ( rc == LDAP_SUCCESS && ctrlsp ) { 2326 LDAPControl *ctrl; 2327 2328 ctrl = ldap_control_find( LDAP_CONTROL_AUTHZID_RESPONSE, 2329 ctrlsp, NULL ); 2330 if ( ctrl ) { 2331 Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (authzid)\n", 2332 op->o_log_prefix, ctrl->ldctl_value.bv_val, 0 ); 2333 if ( ctrl->ldctl_value.bv_len > STRLENOF("dn:") && 2334 strncasecmp( ctrl->ldctl_value.bv_val, "dn:", STRLENOF("dn:") ) == 0 ) 2335 { 2336 struct berval bv; 2337 bv.bv_val = &ctrl->ldctl_value.bv_val[STRLENOF("dn:")]; 2338 bv.bv_len = ctrl->ldctl_value.bv_len - STRLENOF("dn:"); 2339 ber_bvreplace( &lc->lc_bound_ndn, &bv ); 2340 } 2341 } 2342 } 2343 2344 ldap_controls_free( ctrlsp ); 2345 2346 } else if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_WHOAMI ) { 2347 struct berval *val = NULL; 2348 rc = ldap_whoami_s( lc->lc_ld, &val, NULL, NULL ); 2349 if ( rc == LDAP_SUCCESS && val != NULL ) { 2350 Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (whoami)\n", 2351 op->o_log_prefix, val->bv_val, 0 ); 2352 if ( val->bv_len > STRLENOF("dn:") && 2353 strncasecmp( val->bv_val, "dn:", STRLENOF("dn:") ) == 0 ) 2354 { 2355 struct berval bv; 2356 bv.bv_val = &val->bv_val[STRLENOF("dn:")]; 2357 bv.bv_len = val->bv_len - STRLENOF("dn:"); 2358 ber_bvreplace( &lc->lc_bound_ndn, &bv ); 2359 } 2360 ber_bvfree( val ); 2361 } 2362 } 2363 2364 if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_MASK ) && 2365 BER_BVISNULL( &lc->lc_bound_ndn ) ) 2366 { 2367 /* all in all, we only need it to be non-null */ 2368 /* FIXME: should this be configurable? */ 2369 static struct berval bv = BER_BVC("cn=authzdn"); 2370 ber_bvreplace( &lc->lc_bound_ndn, &bv ); 2371 } 2372#endif /* SLAP_AUTH_DN */ 2373 op->o_conn->c_authz_cookie = op->o_bd->be_private; 2374 LDAP_BACK_CONN_ISBOUND_SET( lc ); 2375 break; 2376 2377 case LDAP_LOCAL_ERROR: 2378 /* list client API error codes that require 2379 * to taint the connection */ 2380 /* FIXME: should actually retry? */ 2381 LDAP_BACK_CONN_TAINTED_SET( lc ); 2382 2383 /* fallthru */ 2384 2385 default: 2386 LDAP_BACK_CONN_ISBOUND_CLEAR( lc ); 2387 rs->sr_err = slap_map_api2result( rs ); 2388 if ( sendok & LDAP_BACK_SENDERR ) { 2389 send_ldap_result( op, rs ); 2390 } 2391 break; 2392 } 2393 2394 if ( save_text != rs->sr_text ) { 2395 ldap_memfree( (char *)rs->sr_text ); 2396 rs->sr_text = save_text; 2397 } 2398 2399 ldap_msgfree( result ); 2400 2401 lutil_sasl_freedefs( defaults ); 2402 if ( freeauthz ) { 2403 slap_sl_free( authzID.bv_val, op->o_tmpmemctx ); 2404 } 2405 2406 goto done; 2407#endif /* HAVE_CYRUS_SASL */ 2408 } 2409 2410 switch ( li->li_idassert_authmethod ) { 2411 case LDAP_AUTH_NONE: 2412 /* FIXME: do we really need this? */ 2413 BER_BVSTR( binddn, "" ); 2414 BER_BVSTR( bindcred, "" ); 2415 /* fallthru */ 2416 2417 case LDAP_AUTH_SIMPLE: 2418 rs->sr_err = ldap_sasl_bind( lc->lc_ld, 2419 binddn->bv_val, LDAP_SASL_SIMPLE, 2420 bindcred, NULL, NULL, &msgid ); 2421 rc = ldap_back_op_result( lc, op, rs, msgid, 2422 -1, ( sendok | LDAP_BACK_BINDING ) ); 2423 break; 2424 2425 default: 2426 /* unsupported! */ 2427 LDAP_BACK_CONN_ISBOUND_CLEAR( lc ); 2428 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED; 2429 if ( sendok & LDAP_BACK_SENDERR ) { 2430 send_ldap_result( op, rs ); 2431 } 2432 goto done; 2433 } 2434 2435 if ( rc == LDAP_SUCCESS ) { 2436 /* set rebind stuff in case of successful proxyAuthz bind, 2437 * so that referral chasing is attempted using the right 2438 * identity */ 2439 LDAP_BACK_CONN_ISBOUND_SET( lc ); 2440 op->o_conn->c_authz_cookie = op->o_bd->be_private; 2441 if ( !BER_BVISNULL( binddn ) ) { 2442 ber_bvreplace( &lc->lc_bound_ndn, binddn ); 2443 } 2444 2445 if ( !BER_BVISNULL( &lc->lc_cred ) ) { 2446 memset( lc->lc_cred.bv_val, 0, 2447 lc->lc_cred.bv_len ); 2448 } 2449 2450 if ( LDAP_BACK_SAVECRED( li ) ) { 2451 if ( !BER_BVISNULL( bindcred ) ) { 2452 ber_bvreplace( &lc->lc_cred, bindcred ); 2453 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc ); 2454 } 2455 2456 } else { 2457 lc->lc_cred.bv_len = 0; 2458 } 2459 } 2460 2461done:; 2462 return LDAP_BACK_CONN_ISBOUND( lc ); 2463} 2464 2465/* 2466 * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control 2467 * to existing server-side controls if required; if not, 2468 * the existing server-side controls are placed in *pctrls. 2469 * The caller, after using the controls in client API 2470 * operations, if ( *pctrls != op->o_ctrls ), should 2471 * free( (*pctrls)[ 0 ] ) and free( *pctrls ). 2472 * The function returns success if the control could 2473 * be added if required, or if it did nothing; in the future, 2474 * it might return some error if it failed. 2475 * 2476 * if no bind took place yet, but the connection is bound 2477 * and the "proxyauthzdn" is set, then bind as "proxyauthzdn" 2478 * and explicitly add proxyAuthz the control to every operation 2479 * with the dn bound to the connection as control value. 2480 * 2481 * If no server-side controls are defined for the operation, 2482 * simply add the proxyAuthz control; otherwise, if the 2483 * proxyAuthz control is not already set, add it as 2484 * the first one 2485 * 2486 * FIXME: is controls order significant for security? 2487 * ANSWER: controls ordering and interoperability 2488 * must be indicated by the specs of each control; if none 2489 * is specified, the order is irrelevant. 2490 */ 2491int 2492ldap_back_proxy_authz_ctrl( 2493 Operation *op, 2494 SlapReply *rs, 2495 struct berval *bound_ndn, 2496 int version, 2497 slap_idassert_t *si, 2498 LDAPControl *ctrl ) 2499{ 2500 slap_idassert_mode_t mode; 2501 struct berval assertedID, 2502 ndn; 2503 int isroot = 0; 2504 2505 rs->sr_err = SLAP_CB_CONTINUE; 2506 2507 /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID, 2508 * but if it is not set this test fails. We need a different 2509 * means to detect if idassert is enabled */ 2510 if ( ( BER_BVISNULL( &si->si_bc.sb_authcId ) || BER_BVISEMPTY( &si->si_bc.sb_authcId ) ) 2511 && ( BER_BVISNULL( &si->si_bc.sb_binddn ) || BER_BVISEMPTY( &si->si_bc.sb_binddn ) ) 2512 && BER_BVISNULL( &si->si_bc.sb_saslmech ) ) 2513 { 2514 goto done; 2515 } 2516 2517 if ( !op->o_conn || op->o_do_not_cache || ( isroot = be_isroot( op ) ) ) { 2518 goto done; 2519 } 2520 2521 if ( op->o_tag == LDAP_REQ_BIND ) { 2522 ndn = op->o_req_ndn; 2523 2524 } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) { 2525 ndn = op->o_conn->c_ndn; 2526 2527 } else { 2528 ndn = op->o_ndn; 2529 } 2530 2531 if ( si->si_mode == LDAP_BACK_IDASSERT_LEGACY ) { 2532 if ( op->o_proxy_authz ) { 2533 /* 2534 * FIXME: we do not want to perform proxyAuthz 2535 * on behalf of the client, because this would 2536 * be performed with "proxyauthzdn" privileges. 2537 * 2538 * This might actually be too strict, since 2539 * the "proxyauthzdn" authzTo, and each entry's 2540 * authzFrom attributes may be crafted 2541 * to avoid unwanted proxyAuthz to take place. 2542 */ 2543#if 0 2544 rs->sr_err = LDAP_UNWILLING_TO_PERFORM; 2545 rs->sr_text = "proxyAuthz not allowed within namingContext"; 2546#endif 2547 goto done; 2548 } 2549 2550 if ( !BER_BVISNULL( bound_ndn ) ) { 2551 goto done; 2552 } 2553 2554 if ( BER_BVISNULL( &ndn ) ) { 2555 goto done; 2556 } 2557 2558 if ( BER_BVISNULL( &si->si_bc.sb_binddn ) ) { 2559 goto done; 2560 } 2561 2562 } else if ( si->si_bc.sb_method == LDAP_AUTH_SASL ) { 2563 if ( ( si->si_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) ) 2564 { 2565 /* already asserted in SASL via native authz */ 2566 goto done; 2567 } 2568 2569 } else if ( si->si_authz && !isroot ) { 2570 int rc; 2571 struct berval authcDN; 2572 2573 if ( BER_BVISNULL( &ndn ) ) { 2574 authcDN = slap_empty_bv; 2575 } else { 2576 authcDN = ndn; 2577 } 2578 rc = slap_sasl_matches( op, si->si_authz, 2579 &authcDN, &authcDN ); 2580 if ( rc != LDAP_SUCCESS ) { 2581 if ( si->si_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) { 2582 /* ndn is not authorized 2583 * to use idassert */ 2584 rs->sr_err = rc; 2585 } 2586 goto done; 2587 } 2588 } 2589 2590 if ( op->o_proxy_authz ) { 2591 /* 2592 * FIXME: we can: 2593 * 1) ignore the already set proxyAuthz control 2594 * 2) leave it in place, and don't set ours 2595 * 3) add both 2596 * 4) reject the operation 2597 * 2598 * option (4) is very drastic 2599 * option (3) will make the remote server reject 2600 * the operation, thus being equivalent to (4) 2601 * option (2) will likely break the idassert 2602 * assumptions, so we cannot accept it; 2603 * option (1) means that we are contradicting 2604 * the client's reques. 2605 * 2606 * I think (4) is the only correct choice. 2607 */ 2608 rs->sr_err = LDAP_UNWILLING_TO_PERFORM; 2609 rs->sr_text = "proxyAuthz not allowed within namingContext"; 2610 } 2611 2612 if ( op->o_is_auth_check ) { 2613 mode = LDAP_BACK_IDASSERT_NOASSERT; 2614 2615 } else { 2616 mode = si->si_mode; 2617 } 2618 2619 switch ( mode ) { 2620 case LDAP_BACK_IDASSERT_LEGACY: 2621 /* original behavior: 2622 * assert the client's identity */ 2623 case LDAP_BACK_IDASSERT_SELF: 2624 assertedID = ndn; 2625 break; 2626 2627 case LDAP_BACK_IDASSERT_ANONYMOUS: 2628 /* assert "anonymous" */ 2629 assertedID = slap_empty_bv; 2630 break; 2631 2632 case LDAP_BACK_IDASSERT_NOASSERT: 2633 /* don't assert; bind as proxyauthzdn */ 2634 goto done; 2635 2636 case LDAP_BACK_IDASSERT_OTHERID: 2637 case LDAP_BACK_IDASSERT_OTHERDN: 2638 /* assert idassert DN */ 2639 assertedID = si->si_bc.sb_authzId; 2640 break; 2641 2642 default: 2643 assert( 0 ); 2644 } 2645 2646 /* if we got here, "" is allowed to proxyAuthz */ 2647 if ( BER_BVISNULL( &assertedID ) ) { 2648 assertedID = slap_empty_bv; 2649 } 2650 2651 /* don't idassert the bound DN (ITS#4497) */ 2652 if ( dn_match( &assertedID, bound_ndn ) ) { 2653 goto done; 2654 } 2655 2656 ctrl->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ; 2657 ctrl->ldctl_iscritical = ( ( si->si_flags & LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL ) == LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL ); 2658 2659 switch ( si->si_mode ) { 2660 /* already in u:ID or dn:DN form */ 2661 case LDAP_BACK_IDASSERT_OTHERID: 2662 case LDAP_BACK_IDASSERT_OTHERDN: 2663 ber_dupbv_x( &ctrl->ldctl_value, &assertedID, op->o_tmpmemctx ); 2664 rs->sr_err = LDAP_SUCCESS; 2665 break; 2666 2667 /* needs the dn: prefix */ 2668 default: 2669 ctrl->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" ); 2670 ctrl->ldctl_value.bv_val = op->o_tmpalloc( ctrl->ldctl_value.bv_len + 1, 2671 op->o_tmpmemctx ); 2672 AC_MEMCPY( ctrl->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) ); 2673 AC_MEMCPY( &ctrl->ldctl_value.bv_val[ STRLENOF( "dn:" ) ], 2674 assertedID.bv_val, assertedID.bv_len + 1 ); 2675 rs->sr_err = LDAP_SUCCESS; 2676 break; 2677 } 2678 2679 /* Older versions of <draft-weltman-ldapv3-proxy> required 2680 * to encode the value of the authzID (and called it proxyDN); 2681 * this hack provides compatibility with those DSAs that 2682 * implement it this way */ 2683 if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) { 2684 struct berval authzID = ctrl->ldctl_value; 2685 BerElementBuffer berbuf; 2686 BerElement *ber = (BerElement *)&berbuf; 2687 ber_tag_t tag; 2688 2689 ber_init2( ber, 0, LBER_USE_DER ); 2690 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx ); 2691 2692 tag = ber_printf( ber, "O", &authzID ); 2693 if ( tag == LBER_ERROR ) { 2694 rs->sr_err = LDAP_OTHER; 2695 goto free_ber; 2696 } 2697 2698 if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) { 2699 rs->sr_err = LDAP_OTHER; 2700 goto free_ber; 2701 } 2702 2703 rs->sr_err = LDAP_SUCCESS; 2704 2705free_ber:; 2706 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx ); 2707 ber_free_buf( ber ); 2708 2709 if ( rs->sr_err != LDAP_SUCCESS ) { 2710 goto done; 2711 } 2712 2713 } else if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) { 2714 struct berval authzID = ctrl->ldctl_value, 2715 tmp; 2716 BerElementBuffer berbuf; 2717 BerElement *ber = (BerElement *)&berbuf; 2718 ber_tag_t tag; 2719 2720 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) { 2721 rs->sr_err = LDAP_PROTOCOL_ERROR; 2722 goto done; 2723 } 2724 2725 tmp = authzID; 2726 tmp.bv_val += STRLENOF( "dn:" ); 2727 tmp.bv_len -= STRLENOF( "dn:" ); 2728 2729 ber_init2( ber, 0, LBER_USE_DER ); 2730 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx ); 2731 2732 /* apparently, Mozilla API encodes this 2733 * as "SEQUENCE { LDAPDN }" */ 2734 tag = ber_printf( ber, "{O}", &tmp ); 2735 if ( tag == LBER_ERROR ) { 2736 rs->sr_err = LDAP_OTHER; 2737 goto free_ber2; 2738 } 2739 2740 if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) { 2741 rs->sr_err = LDAP_OTHER; 2742 goto free_ber2; 2743 } 2744 2745 ctrl->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ; 2746 rs->sr_err = LDAP_SUCCESS; 2747 2748free_ber2:; 2749 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx ); 2750 ber_free_buf( ber ); 2751 2752 if ( rs->sr_err != LDAP_SUCCESS ) { 2753 goto done; 2754 } 2755 } 2756 2757done:; 2758 2759 return rs->sr_err; 2760} 2761 2762/* 2763 * Add controls; 2764 * 2765 * if any needs to be added, it is prepended to existing ones, 2766 * in a newly allocated array. The companion function 2767 * ldap_back_controls_free() must be used to restore the original 2768 * status of op->o_ctrls. 2769 */ 2770int 2771ldap_back_controls_add( 2772 Operation *op, 2773 SlapReply *rs, 2774 ldapconn_t *lc, 2775 LDAPControl ***pctrls ) 2776{ 2777 ldapinfo_t *li = (ldapinfo_t *)op->o_bd->be_private; 2778 2779 LDAPControl **ctrls = NULL; 2780 /* set to the maximum number of controls this backend can add */ 2781 LDAPControl c[ 2 ] = { { 0 } }; 2782 int n = 0, i, j1 = 0, j2 = 0; 2783 2784 *pctrls = NULL; 2785 2786 rs->sr_err = LDAP_SUCCESS; 2787 2788 /* don't add controls if protocol is not LDAPv3 */ 2789 switch ( li->li_version ) { 2790 case LDAP_VERSION3: 2791 break; 2792 2793 case 0: 2794 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) { 2795 break; 2796 } 2797 /* fall thru */ 2798 2799 default: 2800 goto done; 2801 } 2802 2803 /* put controls that go __before__ existing ones here */ 2804 2805 /* proxyAuthz for identity assertion */ 2806 switch ( ldap_back_proxy_authz_ctrl( op, rs, &lc->lc_bound_ndn, 2807 li->li_version, &li->li_idassert, &c[ j1 ] ) ) 2808 { 2809 case SLAP_CB_CONTINUE: 2810 break; 2811 2812 case LDAP_SUCCESS: 2813 j1++; 2814 break; 2815 2816 default: 2817 goto done; 2818 } 2819 2820 /* put controls that go __after__ existing ones here */ 2821 2822#ifdef SLAP_CONTROL_X_SESSION_TRACKING 2823 /* FIXME: according to <draft-wahl-ldap-session>, 2824 * the server should check if the control can be added 2825 * based on the identity of the client and so */ 2826 2827 /* session tracking */ 2828 if ( LDAP_BACK_ST_REQUEST( li ) ) { 2829 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) { 2830 case SLAP_CB_CONTINUE: 2831 break; 2832 2833 case LDAP_SUCCESS: 2834 j2++; 2835 break; 2836 2837 default: 2838 goto done; 2839 } 2840 } 2841#endif /* SLAP_CONTROL_X_SESSION_TRACKING */ 2842 2843 if ( rs->sr_err == SLAP_CB_CONTINUE ) { 2844 rs->sr_err = LDAP_SUCCESS; 2845 } 2846 2847 /* if nothing to do, just bail out */ 2848 if ( j1 == 0 && j2 == 0 ) { 2849 goto done; 2850 } 2851 2852 assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) ); 2853 2854 if ( op->o_ctrls ) { 2855 for ( n = 0; op->o_ctrls[ n ]; n++ ) 2856 /* just count ctrls */ ; 2857 } 2858 2859 ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ), 2860 op->o_tmpmemctx ); 2861 if ( j1 ) { 2862 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ]; 2863 *ctrls[ 0 ] = c[ 0 ]; 2864 for ( i = 1; i < j1; i++ ) { 2865 ctrls[ i ] = &ctrls[ 0 ][ i ]; 2866 *ctrls[ i ] = c[ i ]; 2867 } 2868 } 2869 2870 i = 0; 2871 if ( op->o_ctrls ) { 2872 for ( i = 0; op->o_ctrls[ i ]; i++ ) { 2873 ctrls[ i + j1 ] = op->o_ctrls[ i ]; 2874 } 2875 } 2876 2877 n += j1; 2878 if ( j2 ) { 2879 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1; 2880 *ctrls[ n ] = c[ j1 ]; 2881 for ( i = 1; i < j2; i++ ) { 2882 ctrls[ n + i ] = &ctrls[ n ][ i ]; 2883 *ctrls[ n + i ] = c[ i ]; 2884 } 2885 } 2886 2887 ctrls[ n + j2 ] = NULL; 2888 2889done:; 2890 if ( ctrls == NULL ) { 2891 ctrls = op->o_ctrls; 2892 } 2893 2894 *pctrls = ctrls; 2895 2896 return rs->sr_err; 2897} 2898 2899int 2900ldap_back_controls_free( Operation *op, SlapReply *rs, LDAPControl ***pctrls ) 2901{ 2902 LDAPControl **ctrls = *pctrls; 2903 2904 /* we assume that the controls added by the proxy come first, 2905 * so as soon as we find op->o_ctrls[ 0 ] we can stop */ 2906 if ( ctrls && ctrls != op->o_ctrls ) { 2907 int i = 0, n = 0, n_added; 2908 LDAPControl *lower, *upper; 2909 2910 assert( ctrls[ 0 ] != NULL ); 2911 2912 for ( n = 0; ctrls[ n ] != NULL; n++ ) 2913 /* count 'em */ ; 2914 2915 if ( op->o_ctrls ) { 2916 for ( i = 0; op->o_ctrls[ i ] != NULL; i++ ) 2917 /* count 'em */ ; 2918 } 2919 2920 n_added = n - i; 2921 lower = (LDAPControl *)&ctrls[ n ]; 2922 upper = &lower[ n_added ]; 2923 2924 for ( i = 0; ctrls[ i ] != NULL; i++ ) { 2925 if ( ctrls[ i ] < lower || ctrls[ i ] >= upper ) { 2926 /* original; don't touch */ 2927 continue; 2928 } 2929 2930 if ( !BER_BVISNULL( &ctrls[ i ]->ldctl_value ) ) { 2931 op->o_tmpfree( ctrls[ i ]->ldctl_value.bv_val, op->o_tmpmemctx ); 2932 } 2933 } 2934 2935 op->o_tmpfree( ctrls, op->o_tmpmemctx ); 2936 } 2937 2938 *pctrls = NULL; 2939 2940 return 0; 2941} 2942 2943int 2944ldap_back_conn2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen ) 2945{ 2946 char tbuf[ SLAP_TEXT_BUFLEN ]; 2947 char *ptr = buf, *end = buf + buflen; 2948 int len; 2949 2950 if ( ptr + sizeof("conn=") > end ) return -1; 2951 ptr = lutil_strcopy( ptr, "conn=" ); 2952 2953 len = ldap_back_connid2str( lc, ptr, (ber_len_t)(end - ptr) ); 2954 ptr += len; 2955 if ( ptr >= end ) return -1; 2956 2957 if ( !BER_BVISNULL( &lc->lcb_local_ndn ) ) { 2958 if ( ptr + sizeof(" DN=\"\"") + lc->lcb_local_ndn.bv_len > end ) return -1; 2959 ptr = lutil_strcopy( ptr, " DN=\"" ); 2960 ptr = lutil_strncopy( ptr, lc->lcb_local_ndn.bv_val, lc->lcb_local_ndn.bv_len ); 2961 *ptr++ = '"'; 2962 } 2963 2964 if ( lc->lcb_create_time != 0 ) { 2965 len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_create_time ); 2966 if ( ptr + sizeof(" created=") + len >= end ) return -1; 2967 ptr = lutil_strcopy( ptr, " created=" ); 2968 ptr = lutil_strcopy( ptr, tbuf ); 2969 } 2970 2971 if ( lc->lcb_time != 0 ) { 2972 len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_time ); 2973 if ( ptr + sizeof(" modified=") + len >= end ) return -1; 2974 ptr = lutil_strcopy( ptr, " modified=" ); 2975 ptr = lutil_strcopy( ptr, tbuf ); 2976 } 2977 2978 len = snprintf( tbuf, sizeof(tbuf), "%u", lc->lcb_refcnt ); 2979 if ( ptr + sizeof(" refcnt=") + len >= end ) return -1; 2980 ptr = lutil_strcopy( ptr, " refcnt=" ); 2981 ptr = lutil_strcopy( ptr, tbuf ); 2982 2983 return ptr - buf; 2984} 2985 2986int 2987ldap_back_connid2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen ) 2988{ 2989 static struct berval conns[] = { 2990 BER_BVC("ROOTDN"), 2991 BER_BVC("ROOTDN-TLS"), 2992 BER_BVC("ANON"), 2993 BER_BVC("ANON-TLS"), 2994 BER_BVC("BIND"), 2995 BER_BVC("BIND-TLS"), 2996 BER_BVNULL 2997 }; 2998 2999 int len = 0; 3000 3001 if ( LDAP_BACK_PCONN_ISPRIV( (const ldapconn_t *)lc ) ) { 3002 long cid; 3003 struct berval *bv; 3004 3005 cid = (long)lc->lcb_conn; 3006 assert( cid >= LDAP_BACK_PCONN_FIRST && cid < LDAP_BACK_PCONN_LAST ); 3007 3008 bv = &conns[ cid ]; 3009 3010 if ( bv->bv_len >= buflen ) { 3011 return bv->bv_len + 1; 3012 } 3013 3014 len = bv->bv_len; 3015 lutil_strncopy( buf, bv->bv_val, bv->bv_len + 1 ); 3016 3017 } else { 3018 len = snprintf( buf, buflen, "%lu", lc->lcb_conn->c_connid ); 3019 } 3020 3021 return len; 3022} 3023