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   1 /* acl.c - routines to parse and check acl's */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2010 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27 #include "portable.h"
  28
  29 #include <stdio.h>
  30
  31 #include <ac/regex.h>
  32 #include <ac/socket.h>
  33 #include <ac/string.h>
  34
  35 #include "slap.h"
  36 #include "sets.h"
  37 #include "lber_pvt.h"
  38 #include "lutil.h"
  39
  40 #define ACL_BUF_SIZE    1024    /* use most appropriate size */
  41
  42 static const struct berval      acl_bv_ip_eq = BER_BVC( "IP=" );
  43 #ifdef LDAP_PF_INET6
  44 static const struct berval      acl_bv_ipv6_eq = BER_BVC( "IP=[" );
  45 #endif /* LDAP_PF_INET6 */
  46 #ifdef LDAP_PF_LOCAL
  47 static const struct berval      acl_bv_path_eq = BER_BVC("PATH=");
  48 #endif /* LDAP_PF_LOCAL */
  49
  50 static AccessControl * slap_acl_get(
  51         AccessControl *ac, int *count,
  52         Operation *op, Entry *e,
  53         AttributeDescription *desc,
  54         struct berval *val,
  55         AclRegexMatches *matches,
  56         slap_mask_t *mask,
  57         AccessControlState *state );
  58
  59 static slap_control_t slap_acl_mask(
  60         AccessControl *ac, slap_mask_t *mask,
  61         Operation *op, Entry *e,
  62         AttributeDescription *desc,
  63         struct berval *val,
  64         AclRegexMatches *matches,
  65         int count,
  66         AccessControlState *state,
  67         slap_access_t access );
  68
  69 static int      regex_matches(
  70         struct berval *pat, char *str,
  71         struct berval *dn_matches, struct berval *val_matches,
  72         AclRegexMatches *matches);
  73
  74 typedef struct AclSetCookie {
  75         SetCookie       asc_cookie;
  76 #define asc_op          asc_cookie.set_op
  77         Entry           *asc_e;
  78 } AclSetCookie;
  79
  80
  81 SLAP_SET_GATHER acl_set_gather;
  82 SLAP_SET_GATHER acl_set_gather2;
  83
  84 /*
  85  * access_allowed - check whether op->o_ndn is allowed the requested access
  86  * to entry e, attribute attr, value val.  if val is null, access to
  87  * the whole attribute is assumed (all values).
  88  *
  89  * This routine loops through all access controls and calls
  90  * slap_acl_mask() on each applicable access control.
  91  * The loop exits when a definitive answer is reached or
  92  * or no more controls remain.
  93  *
  94  * returns:
  95  *              0       access denied
  96  *              1       access granted
  97  *
  98  * Notes:
  99  * - can be legally called with op == NULL
 100  * - can be legally called with op->o_bd == NULL
 101  */
 102
 103 int
 104 slap_access_always_allowed(
 105         Operation               *op,
 106         Entry                   *e,
 107         AttributeDescription    *desc,
 108         struct berval           *val,
 109         slap_access_t           access,
 110         AccessControlState      *state,
 111         slap_mask_t             *maskp )
 112 {
 113         assert( maskp != NULL );
 114
 115         /* assign all */
 116         ACL_LVL_ASSIGN_MANAGE( *maskp );
 117
 118         return 1;
 119 }
 120
 121 #define MATCHES_DNMAXCOUNT(m)                                   \
 122         ( sizeof ( (m)->dn_data ) / sizeof( *(m)->dn_data ) )
 123 #define MATCHES_VALMAXCOUNT(m)                                  \
 124         ( sizeof ( (m)->val_data ) / sizeof( *(m)->val_data ) )
 125 #define MATCHES_MEMSET(m) do {                                  \
 126         memset( (m)->dn_data, '\0', sizeof( (m)->dn_data ) );   \
 127         memset( (m)->val_data, '\0', sizeof( (m)->val_data ) ); \
 128         (m)->dn_count = MATCHES_DNMAXCOUNT( (m) );              \
 129         (m)->val_count = MATCHES_VALMAXCOUNT( (m) );            \
 130 } while ( 0 /* CONSTCOND */ )
 131
 132 int
 133 slap_access_allowed(
 134         Operation               *op,
 135         Entry                   *e,
 136         AttributeDescription    *desc,
 137         struct berval           *val,
 138         slap_access_t           access,
 139         AccessControlState      *state,
 140         slap_mask_t             *maskp )
 141 {
 142         int                             ret = 1;
 143         int                             count;
 144         AccessControl                   *a = NULL;
 145
 146 #ifdef LDAP_DEBUG
 147         char                            accessmaskbuf[ACCESSMASK_MAXLEN];
 148 #endif
 149         slap_mask_t                     mask;
 150         slap_control_t                  control;
 151         slap_access_t                   access_level;
 152         const char                      *attr;
 153         AclRegexMatches                 matches;
 154         AccessControlState              acl_state = ACL_STATE_INIT;
 155         static AccessControlState       state_init = ACL_STATE_INIT;
 156
 157         assert( op != NULL );
 158         assert( e != NULL );
 159         assert( desc != NULL );
 160         assert( maskp != NULL );
 161
 162         access_level = ACL_LEVEL( access );
 163         attr = desc->ad_cname.bv_val;
 164
 165         assert( attr != NULL );
 166
 167         ACL_INIT( mask );
 168
 169         /* grant database root access */
 170         if ( be_isroot( op ) ) {
 171                 Debug( LDAP_DEBUG_ACL, "<= root access granted\n", 0, 0, 0 );
 172                 mask = ACL_LVL_MANAGE;
 173                 goto done;
 174         }
 175
 176         /*
 177          * no-user-modification operational attributes are ignored
 178          * by ACL_WRITE checking as any found here are not provided
 179          * by the user
 180          *
 181          * NOTE: but they are not ignored for ACL_MANAGE, because
 182          * if we get here it means a non-root user is trying to
 183          * manage data, so we need to check its privileges.
 184          */
 185         if ( access_level == ACL_WRITE
 186                 && is_at_no_user_mod( desc->ad_type )
 187                 && desc != slap_schema.si_ad_entry
 188                 && desc != slap_schema.si_ad_children )
 189         {
 190                 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
 191                         " %s access granted\n",
 192                         attr, 0, 0 );
 193                 goto done;
 194         }
 195
 196         /* use backend default access if no backend acls */
 197         if ( op->o_bd->be_acl == NULL && frontendDB->be_acl == NULL ) {
 198                 int     i;
 199
 200                 Debug( LDAP_DEBUG_ACL,
 201                         "=> slap_access_allowed: backend default %s "
 202                         "access %s to \"%s\"\n",
 203                         access2str( access ),
 204                         op->o_bd->be_dfltaccess >= access_level ? "granted" : "denied",
 205                         op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" );
 206                 ret = op->o_bd->be_dfltaccess >= access_level;
 207
 208                 mask = ACL_PRIV_LEVEL;
 209                 for ( i = ACL_NONE; i <= op->o_bd->be_dfltaccess; i++ ) {
 210                         ACL_PRIV_SET( mask, ACL_ACCESS2PRIV( i ) );
 211                 }
 212
 213                 goto done;
 214         }
 215
 216         ret = 0;
 217         control = ACL_BREAK;
 218
 219         if ( state == NULL )
 220                 state = &acl_state;
 221         if ( state->as_desc == desc &&
 222                 state->as_access == access &&
 223                 state->as_vd_acl_present )
 224         {
 225                 a = state->as_vd_acl;
 226                 count = state->as_vd_acl_count;
 227                 if ( state->as_fe_done )
 228                         state->as_fe_done--;
 229                 ACL_PRIV_ASSIGN( mask, state->as_vd_mask );
 230         } else {
 231                 *state = state_init;
 232
 233                 a = NULL;
 234                 count = 0;
 235                 ACL_PRIV_ASSIGN( mask, *maskp );
 236         }
 237
 238         MATCHES_MEMSET( &matches );
 239
 240         while ( ( a = slap_acl_get( a, &count, op, e, desc, val,
 241                 &matches, &mask, state ) ) != NULL )
 242         {
 243                 int i;
 244                 int dnmaxcount = MATCHES_DNMAXCOUNT( &matches );
 245                 int valmaxcount = MATCHES_VALMAXCOUNT( &matches );
 246                 regmatch_t *dn_data = matches.dn_data;
 247                 regmatch_t *val_data = matches.val_data;
 248
 249                 /* DN matches */
 250                 for ( i = 0; i < dnmaxcount && dn_data[i].rm_eo > 0; i++ ) {
 251                         char *data = e->e_ndn;
 252
 253                         Debug( LDAP_DEBUG_ACL, "=> match[dn%d]: %d %d ", i,
 254                                 (int)dn_data[i].rm_so,
 255                                 (int)dn_data[i].rm_eo );
 256                         if ( dn_data[i].rm_so <= dn_data[0].rm_eo ) {
 257                                 int n;
 258                                 for ( n = dn_data[i].rm_so;
 259                                       n < dn_data[i].rm_eo; n++ ) {
 260                                         Debug( LDAP_DEBUG_ACL, "%c",
 261                                                data[n], 0, 0 );
 262                                 }
 263                         }
 264                         Debug( LDAP_DEBUG_ACL, "\n", 0, 0, 0 );
 265                 }
 266
 267                 /* val matches */
 268                 for ( i = 0; i < valmaxcount && val_data[i].rm_eo > 0; i++ ) {
 269                         char *data = val->bv_val;
 270
 271                         Debug( LDAP_DEBUG_ACL, "=> match[val%d]: %d %d ", i,
 272                                 (int)val_data[i].rm_so,
 273                                 (int)val_data[i].rm_eo );
 274                         if ( val_data[i].rm_so <= val_data[0].rm_eo ) {
 275                                 int n;
 276                                 for ( n = val_data[i].rm_so;
 277                                       n < val_data[i].rm_eo; n++ ) {
 278                                         Debug( LDAP_DEBUG_ACL, "%c",
 279                                                data[n], 0, 0 );
 280                                 }
 281                         }
 282                         Debug( LDAP_DEBUG_ACL, "\n", 0, 0, 0 );
 283                 }
 284
 285                 control = slap_acl_mask( a, &mask, op,
 286                         e, desc, val, &matches, count, state, access );
 287
 288                 if ( control != ACL_BREAK ) {
 289                         break;
 290                 }
 291
 292                 MATCHES_MEMSET( &matches );
 293         }
 294
 295         if ( ACL_IS_INVALID( mask ) ) {
 296                 Debug( LDAP_DEBUG_ACL,
 297                         "=> slap_access_allowed: \"%s\" (%s) invalid!\n",
 298                         e->e_dn, attr, 0 );
 299                 ACL_PRIV_ASSIGN( mask, *maskp );
 300
 301         } else if ( control == ACL_BREAK ) {
 302                 Debug( LDAP_DEBUG_ACL,
 303                         "=> slap_access_allowed: no more rules\n", 0, 0, 0 );
 304
 305                 goto done;
 306         }
 307
 308         ret = ACL_GRANT( mask, access );
 309
 310         Debug( LDAP_DEBUG_ACL,
 311                 "=> slap_access_allowed: %s access %s by %s\n",
 312                 access2str( access ), ret ? "granted" : "denied",
 313                 accessmask2str( mask, accessmaskbuf, 1 ) );
 314
 315 done:
 316         ACL_PRIV_ASSIGN( *maskp, mask );
 317         return ret;
 318 }
 319
 320 int
 321 fe_access_allowed(
 322         Operation               *op,
 323         Entry                   *e,
 324         AttributeDescription    *desc,
 325         struct berval           *val,
 326         slap_access_t           access,
 327         AccessControlState      *state,
 328         slap_mask_t             *maskp )
 329 {
 330         BackendDB               *be_orig;
 331         int                     rc;
 332
 333         /*
 334          * NOTE: control gets here if FIXME
 335          * if an appropriate backend cannot be selected for the operation,
 336          * we assume that the frontend should handle this
 337          * FIXME: should select_backend() take care of this,
 338          * and return frontendDB instead of NULL?  maybe for some value
 339          * of the flags?
 340          */
 341         be_orig = op->o_bd;
 342
 343         if ( op->o_bd == NULL ) {
 344                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
 345                 if ( op->o_bd == NULL )
 346                         op->o_bd = frontendDB;
 347         }
 348         rc = slap_access_allowed( op, e, desc, val, access, state, maskp );
 349         op->o_bd = be_orig;
 350
 351         return rc;
 352 }
 353
 354 int
 355 access_allowed_mask(
 356         Operation               *op,
 357         Entry                   *e,
 358         AttributeDescription    *desc,
 359         struct berval           *val,
 360         slap_access_t           access,
 361         AccessControlState      *state,
 362         slap_mask_t             *maskp )
 363 {
 364         int                             ret = 1;
 365         int                             be_null = 0;
 366
 367 #ifdef LDAP_DEBUG
 368         char                            accessmaskbuf[ACCESSMASK_MAXLEN];
 369 #endif
 370         slap_mask_t                     mask;
 371         slap_access_t                   access_level;
 372         const char                      *attr;
 373
 374         assert( e != NULL );
 375         assert( desc != NULL );
 376
 377         access_level = ACL_LEVEL( access );
 378
 379         assert( access_level > ACL_NONE );
 380
 381         ACL_INIT( mask );
 382         if ( maskp ) ACL_INVALIDATE( *maskp );
 383
 384         attr = desc->ad_cname.bv_val;
 385
 386         assert( attr != NULL );
 387
 388         if ( op ) {
 389                 if ( op->o_acl_priv != ACL_NONE ) {
 390                         access = op->o_acl_priv;
 391
 392                 } else if ( op->o_is_auth_check &&
 393                         ( access_level == ACL_SEARCH || access_level == ACL_READ ) )
 394                 {
 395                         access = ACL_AUTH;
 396
 397                 } else if ( get_relax( op ) && access_level == ACL_WRITE &&
 398                         desc == slap_schema.si_ad_entry )
 399                 {
 400                         access = ACL_MANAGE;
 401                 }
 402         }
 403
 404         if ( state != NULL ) {
 405                 if ( state->as_desc == desc &&
 406                         state->as_access == access &&
 407                         state->as_result != -1 &&
 408                         !state->as_vd_acl_present )
 409                         {
 410                         Debug( LDAP_DEBUG_ACL,
 411                                 "=> access_allowed: result was in cache (%s)\n",
 412                                 attr, 0, 0 );
 413                                 return state->as_result;
 414                 } else {
 415                         Debug( LDAP_DEBUG_ACL,
 416                                 "=> access_allowed: result not in cache (%s)\n",
 417                                 attr, 0, 0 );
 418                 }
 419         }
 420
 421         Debug( LDAP_DEBUG_ACL,
 422                 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
 423                 access2str( access ), e->e_dn, attr );
 424
 425         if ( op == NULL ) {
 426                 /* no-op call */
 427                 goto done;
 428         }
 429
 430         if ( op->o_bd == NULL ) {
 431                 op->o_bd = LDAP_STAILQ_FIRST( &backendDB );
 432                 be_null = 1;
 433
 434                 /* FIXME: experimental; use first backend rules
 435                  * iff there is no global_acl (ITS#3100)
 436                  */
 437                 if ( frontendDB->be_acl != NULL ) {
 438                         op->o_bd = frontendDB;
 439                 }
 440         }
 441         assert( op->o_bd != NULL );
 442
 443         /* this is enforced in backend_add() */
 444         if ( op->o_bd->bd_info->bi_access_allowed ) {
 445                 /* delegate to backend */
 446                 ret = op->o_bd->bd_info->bi_access_allowed( op, e,
 447                                 desc, val, access, state, &mask );
 448
 449         } else {
 450                 /* use default (but pass through frontend
 451                  * for global ACL overlays) */
 452                 ret = frontendDB->bd_info->bi_access_allowed( op, e,
 453                                 desc, val, access, state, &mask );
 454         }
 455
 456         if ( !ret ) {
 457                 if ( ACL_IS_INVALID( mask ) ) {
 458                         Debug( LDAP_DEBUG_ACL,
 459                                 "=> access_allowed: \"%s\" (%s) invalid!\n",
 460                                 e->e_dn, attr, 0 );
 461                         ACL_INIT( mask );
 462
 463                 } else {
 464                         Debug( LDAP_DEBUG_ACL,
 465                                 "=> access_allowed: no more rules\n", 0, 0, 0 );
 466
 467                         goto done;
 468                 }
 469         }
 470
 471         Debug( LDAP_DEBUG_ACL,
 472                 "=> access_allowed: %s access %s by %s\n",
 473                 access2str( access ), ret ? "granted" : "denied",
 474                 accessmask2str( mask, accessmaskbuf, 1 ) );
 475
 476 done:
 477         if ( state != NULL ) {
 478                 state->as_access = access;
 479                         state->as_result = ret;
 480                 state->as_desc = desc;
 481         }
 482         if ( be_null ) op->o_bd = NULL;
 483         if ( maskp ) ACL_PRIV_ASSIGN( *maskp, mask );
 484         return ret;
 485 }
 486
 487
 488 /*
 489  * slap_acl_get - return the acl applicable to entry e, attribute
 490  * attr.  the acl returned is suitable for use in subsequent calls to
 491  * acl_access_allowed().
 492  */
 493
 494 static AccessControl *
 495 slap_acl_get(
 496         AccessControl *a,
 497         int                     *count,
 498         Operation       *op,
 499         Entry           *e,
 500         AttributeDescription *desc,
 501         struct berval   *val,
 502         AclRegexMatches *matches,
 503         slap_mask_t *mask,
 504         AccessControlState *state )
 505 {
 506         const char *attr;
 507         ber_len_t dnlen;
 508         AccessControl *prev;
 509
 510         assert( e != NULL );
 511         assert( count != NULL );
 512         assert( desc != NULL );
 513         assert( state != NULL );
 514
 515         attr = desc->ad_cname.bv_val;
 516
 517         assert( attr != NULL );
 518
 519         if( a == NULL ) {
 520                 if( op->o_bd == NULL || op->o_bd->be_acl == NULL ) {
 521                         a = frontendDB->be_acl;
 522                 } else {
 523                         a = op->o_bd->be_acl;
 524                 }
 525                 prev = NULL;
 526
 527                 assert( a != NULL );
 528                 if ( a == frontendDB->be_acl )
 529                         state->as_fe_done = 1;
 530         } else {
 531                 prev = a;
 532                 a = a->acl_next;
 533         }
 534
 535         dnlen = e->e_nname.bv_len;
 536
 537  retry:
 538         for ( ; a != NULL; prev = a, a = a->acl_next ) {
 539                 (*count) ++;
 540
 541                 if ( a != frontendDB->be_acl && state->as_fe_done )
 542                         state->as_fe_done++;
 543
 544                 if ( a->acl_dn_pat.bv_len || ( a->acl_dn_style != ACL_STYLE_REGEX )) {
 545                         if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
 546                                 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
 547                                         *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub );
 548                                 if ( regexec ( &a->acl_dn_re,
 549                                                e->e_ndn,
 550                                                matches->dn_count,
 551                                                matches->dn_data, 0 ) )
 552                                         continue;
 553
 554                         } else {
 555                                 ber_len_t patlen;
 556
 557                                 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
 558                                         *count, a->acl_dn_pat.bv_val, 0 );
 559                                 patlen = a->acl_dn_pat.bv_len;
 560                                 if ( dnlen < patlen )
 561                                         continue;
 562
 563                                 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
 564                                         /* base dn -- entire object DN must match */
 565                                         if ( dnlen != patlen )
 566                                                 continue;
 567
 568                                 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
 569                                         ber_len_t       rdnlen = 0;
 570                                         ber_len_t       sep = 0;
 571
 572                                         if ( dnlen <= patlen )
 573                                                 continue;
 574
 575                                         if ( patlen > 0 ) {
 576                                                 if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 577                                                         continue;
 578                                                 sep = 1;
 579                                         }
 580
 581                                         rdnlen = dn_rdnlen( NULL, &e->e_nname );
 582                                         if ( rdnlen + patlen + sep != dnlen )
 583                                                 continue;
 584
 585                                 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
 586                                         if ( dnlen > patlen && !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 587                                                 continue;
 588
 589                                 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
 590                                         if ( dnlen <= patlen )
 591                                                 continue;
 592                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 593                                                 continue;
 594                                 }
 595
 596                                 if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
 597                                         continue;
 598                         }
 599
 600                         Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
 601                                 *count, 0, 0 );
 602                 }
 603
 604                 if ( a->acl_attrs && !ad_inlist( desc, a->acl_attrs ) ) {
 605                         matches->dn_data[0].rm_so = -1;
 606                         matches->dn_data[0].rm_eo = -1;
 607                         matches->val_data[0].rm_so = -1;
 608                         matches->val_data[0].rm_eo = -1;
 609                         continue;
 610                 }
 611
 612                 /* Is this ACL only for a specific value? */
 613                 if ( a->acl_attrval.bv_len ) {
 614                         if ( val == NULL ) {
 615                                 continue;
 616                         }
 617
 618                         if ( !state->as_vd_acl_present ) {
 619                                 state->as_vd_acl_present = 1;
 620                                 state->as_vd_acl = prev;
 621                                 state->as_vd_acl_count = *count - 1;
 622                                 ACL_PRIV_ASSIGN ( state->as_vd_mask, *mask );
 623                         }
 624
 625                         if ( a->acl_attrval_style == ACL_STYLE_REGEX ) {
 626                                 Debug( LDAP_DEBUG_ACL,
 627                                         "acl_get: valpat %s\n",
 628                                         a->acl_attrval.bv_val, 0, 0 );
 629                                 if ( regexec ( &a->acl_attrval_re,
 630                                                     val->bv_val,
 631                                                     matches->val_count,
 632                                                     matches->val_data, 0 ) )
 633                                 {
 634                                         continue;
 635                                 }
 636
 637                         } else {
 638                                 int match = 0;
 639                                 const char *text;
 640                                 Debug( LDAP_DEBUG_ACL,
 641                                         "acl_get: val %s\n",
 642                                         a->acl_attrval.bv_val, 0, 0 );
 643
 644                                 if ( a->acl_attrs[0].an_desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName ) {
 645                                         if (value_match( &match, desc,
 646                                                 a->acl_attrval_mr, 0,
 647                                                 val, &a->acl_attrval, &text ) != LDAP_SUCCESS ||
 648                                                         match )
 649                                                 continue;
 650
 651                                 } else {
 652                                         ber_len_t       patlen, vdnlen;
 653
 654                                         patlen = a->acl_attrval.bv_len;
 655                                         vdnlen = val->bv_len;
 656
 657                                         if ( vdnlen < patlen )
 658                                                 continue;
 659
 660                                         if ( a->acl_attrval_style == ACL_STYLE_BASE ) {
 661                                                 if ( vdnlen > patlen )
 662                                                         continue;
 663
 664                                         } else if ( a->acl_attrval_style == ACL_STYLE_ONE ) {
 665                                                 ber_len_t       rdnlen = 0;
 666
 667                                                 if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
 668                                                         continue;
 669
 670                                                 rdnlen = dn_rdnlen( NULL, val );
 671                                                 if ( rdnlen + patlen + 1 != vdnlen )
 672                                                         continue;
 673
 674                                         } else if ( a->acl_attrval_style == ACL_STYLE_SUBTREE ) {
 675                                                 if ( vdnlen > patlen && !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
 676                                                         continue;
 677
 678                                         } else if ( a->acl_attrval_style == ACL_STYLE_CHILDREN ) {
 679                                                 if ( vdnlen <= patlen )
 680                                                         continue;
 681
 682                                                 if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
 683                                                         continue;
 684                                         }
 685
 686                                         if ( strcmp( a->acl_attrval.bv_val, val->bv_val + vdnlen - patlen ) )
 687                                                 continue;
 688                                 }
 689                         }
 690                 }
 691
 692                 if ( a->acl_filter != NULL ) {
 693                         ber_int_t rc = test_filter( NULL, e, a->acl_filter );
 694                         if ( rc != LDAP_COMPARE_TRUE ) {
 695                                 continue;
 696                         }
 697                 }
 698
 699                 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] attr %s\n",
 700                        *count, attr, 0);
 701                 return a;
 702         }
 703
 704         if ( !state->as_fe_done ) {
 705                 state->as_fe_done = 1;
 706                 a = frontendDB->be_acl;
 707                 goto retry;
 708         }
 709
 710         Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
 711         return( NULL );
 712 }
 713
 714 /*
 715  * Record value-dependent access control state
 716  */
 717 #define ACL_RECORD_VALUE_STATE do { \
 718                 if( state && !state->as_vd_acl_present ) { \
 719                         state->as_vd_acl_present = 1; \
 720                         state->as_vd_acl = a; \
 721                         state->as_vd_acl_count = count; \
 722                         ACL_PRIV_ASSIGN( state->as_vd_mask, *mask ); \
 723                 } \
 724         } while( 0 )
 725
 726 static int
 727 acl_mask_dn(
 728         Operation               *op,
 729         Entry                   *e,
 730         struct berval           *val,
 731         AccessControl           *a,
 732         AclRegexMatches         *matches,
 733         slap_dn_access          *bdn,
 734         struct berval           *opndn )
 735 {
 736         /*
 737          * if access applies to the entry itself, and the
 738          * user is bound as somebody in the same namespace as
 739          * the entry, OR the given dn matches the dn pattern
 740          */
 741         /*
 742          * NOTE: styles "anonymous", "users" and "self"
 743          * have been moved to enum slap_style_t, whose
 744          * value is set in a_dn_style; however, the string
 745          * is maintained in a_dn_pat.
 746          */
 747
 748         if ( bdn->a_style == ACL_STYLE_ANONYMOUS ) {
 749                 if ( !BER_BVISEMPTY( opndn ) ) {
 750                         return 1;
 751                 }
 752
 753         } else if ( bdn->a_style == ACL_STYLE_USERS ) {
 754                 if ( BER_BVISEMPTY( opndn ) ) {
 755                         return 1;
 756                 }
 757
 758         } else if ( bdn->a_style == ACL_STYLE_SELF ) {
 759                 struct berval   ndn, selfndn;
 760                 int             level;
 761
 762                 if ( BER_BVISEMPTY( opndn ) || BER_BVISNULL( &e->e_nname ) ) {
 763                         return 1;
 764                 }
 765
 766                 level = bdn->a_self_level;
 767                 if ( level < 0 ) {
 768                         selfndn = *opndn;
 769                         ndn = e->e_nname;
 770                         level = -level;
 771
 772                 } else {
 773                         ndn = *opndn;
 774                         selfndn = e->e_nname;
 775                 }
 776
 777                 for ( ; level > 0; level-- ) {
 778                         if ( BER_BVISEMPTY( &ndn ) ) {
 779                                 break;
 780                         }
 781                         dnParent( &ndn, &ndn );
 782                 }
 783
 784                 if ( BER_BVISEMPTY( &ndn ) || !dn_match( &ndn, &selfndn ) )
 785                 {
 786                         return 1;
 787                 }
 788
 789         } else if ( bdn->a_style == ACL_STYLE_REGEX ) {
 790                 if ( !ber_bvccmp( &bdn->a_pat, '*' ) ) {
 791                         AclRegexMatches tmp_matches,
 792                                         *tmp_matchesp = &tmp_matches;
 793                         int             rc = 0;
 794                         regmatch_t      *tmp_data;
 795
 796                         MATCHES_MEMSET( &tmp_matches );
 797                         tmp_data = &tmp_matches.dn_data[0];
 798
 799                         if ( a->acl_attrval_style == ACL_STYLE_REGEX )
 800                                 tmp_matchesp = matches;
 801                         else switch ( a->acl_dn_style ) {
 802                         case ACL_STYLE_REGEX:
 803                                 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
 804                                         tmp_matchesp = matches;
 805                                         break;
 806                                 }
 807                         /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
 808
 809                         case ACL_STYLE_BASE:
 810                                 tmp_data[0].rm_so = 0;
 811                                 tmp_data[0].rm_eo = e->e_nname.bv_len;
 812                                 tmp_matches.dn_count = 1;
 813                                 break;
 814
 815                         case ACL_STYLE_ONE:
 816                         case ACL_STYLE_SUBTREE:
 817                         case ACL_STYLE_CHILDREN:
 818                                 tmp_data[0].rm_so = 0;
 819                                 tmp_data[0].rm_eo = e->e_nname.bv_len;
 820                                 tmp_data[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
 821                                 tmp_data[1].rm_eo = e->e_nname.bv_len;
 822                                 tmp_matches.dn_count = 2;
 823                                 break;
 824
 825                         default:
 826                                 /* error */
 827                                 rc = 1;
 828                                 break;
 829                         }
 830
 831                         if ( rc ) {
 832                                 return 1;
 833                         }
 834
 835                         if ( !regex_matches( &bdn->a_pat, opndn->bv_val,
 836                                 &e->e_nname, NULL, tmp_matchesp ) )
 837                         {
 838                                 return 1;
 839                         }
 840                 }
 841
 842         } else {
 843                 struct berval   pat;
 844                 ber_len_t       patlen, odnlen;
 845                 int             got_match = 0;
 846
 847                 if ( e->e_dn == NULL )
 848                         return 1;
 849
 850                 if ( bdn->a_expand ) {
 851                         struct berval   bv;
 852                         char            buf[ACL_BUF_SIZE];
 853
 854                         AclRegexMatches tmp_matches,
 855                                         *tmp_matchesp = &tmp_matches;
 856                         int             rc = 0;
 857                         regmatch_t      *tmp_data;
 858
 859                         MATCHES_MEMSET( &tmp_matches );
 860                         tmp_data = &tmp_matches.dn_data[0];
 861
 862                         bv.bv_len = sizeof( buf ) - 1;
 863                         bv.bv_val = buf;
 864
 865                         /* Expand value regex */
 866                         if ( a->acl_attrval_style == ACL_STYLE_REGEX )
 867                                 tmp_matchesp = matches;
 868                         else switch ( a->acl_dn_style ) {
 869                         case ACL_STYLE_REGEX:
 870                                 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
 871                                         tmp_matchesp = matches;
 872                                         break;
 873                                 }
 874                         /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
 875
 876                         case ACL_STYLE_BASE:
 877                                 tmp_data[0].rm_so = 0;
 878                                 tmp_data[0].rm_eo = e->e_nname.bv_len;
 879                                 tmp_matches.dn_count = 1;
 880                                 break;
 881
 882                         case ACL_STYLE_ONE:
 883                         case ACL_STYLE_SUBTREE:
 884                         case ACL_STYLE_CHILDREN:
 885                                 tmp_data[0].rm_so = 0;
 886                                 tmp_data[0].rm_eo = e->e_nname.bv_len;
 887                                 tmp_data[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
 888                                 tmp_data[1].rm_eo = e->e_nname.bv_len;
 889                                 tmp_matches.dn_count = 2;
 890                                 break;
 891
 892                         default:
 893                                 /* error */
 894                                 rc = 1;
 895                                 break;
 896                         }
 897
 898                         if ( rc ) {
 899                                 return 1;
 900                         }
 901
 902                         if ( acl_string_expand( &bv, &bdn->a_pat,
 903                                                 &e->e_nname,
 904                                                 val, tmp_matchesp ) )
 905                         {
 906                                 return 1;
 907                         }
 908
 909                         if ( dnNormalize(0, NULL, NULL, &bv,
 910                                         &pat, op->o_tmpmemctx )
 911                                         != LDAP_SUCCESS )
 912                         {
 913                                 /* did not expand to a valid dn */
 914                                 return 1;
 915                         }
 916
 917                 } else {
 918                         pat = bdn->a_pat;
 919                 }
 920
 921                 patlen = pat.bv_len;
 922                 odnlen = opndn->bv_len;
 923                 if ( odnlen < patlen ) {
 924                         goto dn_match_cleanup;
 925
 926                 }
 927
 928                 if ( bdn->a_style == ACL_STYLE_BASE ) {
 929                         /* base dn -- entire object DN must match */
 930                         if ( odnlen != patlen ) {
 931                                 goto dn_match_cleanup;
 932                         }
 933
 934                 } else if ( bdn->a_style == ACL_STYLE_ONE ) {
 935                         ber_len_t       rdnlen = 0;
 936
 937                         if ( odnlen <= patlen ) {
 938                                 goto dn_match_cleanup;
 939                         }
 940
 941                         if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
 942                                 goto dn_match_cleanup;
 943                         }
 944
 945                         rdnlen = dn_rdnlen( NULL, opndn );
 946                         if ( rdnlen - ( odnlen - patlen - 1 ) != 0 ) {
 947                                 goto dn_match_cleanup;
 948                         }
 949
 950                 } else if ( bdn->a_style == ACL_STYLE_SUBTREE ) {
 951                         if ( odnlen > patlen && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
 952                                 goto dn_match_cleanup;
 953                         }
 954
 955                 } else if ( bdn->a_style == ACL_STYLE_CHILDREN ) {
 956                         if ( odnlen <= patlen ) {
 957                                 goto dn_match_cleanup;
 958                         }
 959
 960                         if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
 961                                 goto dn_match_cleanup;
 962                         }
 963
 964                 } else if ( bdn->a_style == ACL_STYLE_LEVEL ) {
 965                         int             level = bdn->a_level;
 966                         struct berval   ndn;
 967
 968                         if ( odnlen <= patlen ) {
 969                                 goto dn_match_cleanup;
 970                         }
 971
 972                         if ( level > 0 && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) )
 973                         {
 974                                 goto dn_match_cleanup;
 975                         }
 976
 977                         ndn = *opndn;
 978                         for ( ; level > 0; level-- ) {
 979                                 if ( BER_BVISEMPTY( &ndn ) ) {
 980                                         goto dn_match_cleanup;
 981                                 }
 982                                 dnParent( &ndn, &ndn );
 983                                 if ( ndn.bv_len < patlen ) {
 984                                         goto dn_match_cleanup;
 985                                 }
 986                         }
 987
 988                         if ( ndn.bv_len != patlen ) {
 989                                 goto dn_match_cleanup;
 990                         }
 991                 }
 992
 993                 got_match = !strcmp( pat.bv_val, &opndn->bv_val[ odnlen - patlen ] );
 994
 995 dn_match_cleanup:;
 996                 if ( pat.bv_val != bdn->a_pat.bv_val ) {
 997                         slap_sl_free( pat.bv_val, op->o_tmpmemctx );
 998                 }
 999
1000                 if ( !got_match ) {
1001                         return 1;
1002                 }
1003         }
1004
1005         return 0;
1006 }
1007
1008 static int
1009 acl_mask_dnattr(
1010         Operation               *op,
1011         Entry                   *e,
1012         struct berval           *val,
1013         AccessControl           *a,
1014         int                     count,
1015         AccessControlState      *state,
1016         slap_mask_t                     *mask,
1017         slap_dn_access          *bdn,
1018         struct berval           *opndn )
1019 {
1020         Attribute       *at;
1021         struct berval   bv;
1022         int             rc, match = 0;
1023         const char      *text;
1024         const char      *attr = bdn->a_at->ad_cname.bv_val;
1025
1026         assert( attr != NULL );
1027
1028         if ( BER_BVISEMPTY( opndn ) ) {
1029                 return 1;
1030         }
1031
1032         Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n", attr, 0, 0 );
1033         bv = *opndn;
1034
1035         /* see if asker is listed in dnattr */
1036         for ( at = attrs_find( e->e_attrs, bdn->a_at );
1037                 at != NULL;
1038                 at = attrs_find( at->a_next, bdn->a_at ) )
1039         {
1040                 if ( attr_valfind( at,
1041                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1042                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1043                         &bv, NULL, op->o_tmpmemctx ) == 0 )
1044                 {
1045                         /* found it */
1046                         match = 1;
1047                         break;
1048                 }
1049         }
1050
1051         if ( match ) {
1052                 /* have a dnattr match. if this is a self clause then
1053                  * the target must also match the op dn.
1054                  */
1055                 if ( bdn->a_self ) {
1056                         /* check if the target is an attribute. */
1057                         if ( val == NULL ) return 1;
1058
1059                         /* target is attribute, check if the attribute value
1060                          * is the op dn.
1061                          */
1062                         rc = value_match( &match, bdn->a_at,
1063                                 bdn->a_at->ad_type->sat_equality, 0,
1064                                 val, &bv, &text );
1065                         /* on match error or no match, fail the ACL clause */
1066                         if ( rc != LDAP_SUCCESS || match != 0 )
1067                                 return 1;
1068                 }
1069
1070         } else {
1071                 /* no dnattr match, check if this is a self clause */
1072                 if ( ! bdn->a_self )
1073                         return 1;
1074
1075                 ACL_RECORD_VALUE_STATE;
1076
1077                 /* this is a self clause, check if the target is an
1078                  * attribute.
1079                  */
1080                 if ( val == NULL )
1081                         return 1;
1082
1083                 /* target is attribute, check if the attribute value
1084                  * is the op dn.
1085                  */
1086                 rc = value_match( &match, bdn->a_at,
1087                         bdn->a_at->ad_type->sat_equality, 0,
1088                         val, &bv, &text );
1089
1090                 /* on match error or no match, fail the ACL clause */
1091                 if ( rc != LDAP_SUCCESS || match != 0 )
1092                         return 1;
1093         }
1094
1095         return 0;
1096 }
1097
1098
1099 /*
1100  * slap_acl_mask - modifies mask based upon the given acl and the
1101  * requested access to entry e, attribute attr, value val.  if val
1102  * is null, access to the whole attribute is assumed (all values).
1103  *
1104  * returns      0       access NOT allowed
1105  *              1       access allowed
1106  */
1107
1108 static slap_control_t
1109 slap_acl_mask(
1110         AccessControl           *a,
1111         slap_mask_t             *mask,
1112         Operation               *op,
1113         Entry                   *e,
1114         AttributeDescription    *desc,
1115         struct berval           *val,
1116         AclRegexMatches         *matches,
1117         int                     count,
1118         AccessControlState      *state,
1119         slap_access_t   access )
1120 {
1121         int             i;
1122         Access          *b;
1123 #ifdef LDAP_DEBUG
1124         char            accessmaskbuf[ACCESSMASK_MAXLEN];
1125 #endif /* DEBUG */
1126         const char      *attr;
1127 #ifdef SLAP_DYNACL
1128         slap_mask_t     a2pmask = ACL_ACCESS2PRIV( access );
1129 #endif /* SLAP_DYNACL */
1130
1131         assert( a != NULL );
1132         assert( mask != NULL );
1133         assert( desc != NULL );
1134
1135         attr = desc->ad_cname.bv_val;
1136
1137         assert( attr != NULL );
1138
1139         Debug( LDAP_DEBUG_ACL,
1140                 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
1141                 e->e_dn, attr, 0 );
1142
1143         Debug( LDAP_DEBUG_ACL,
1144                 "=> acl_mask: to %s by \"%s\", (%s) \n",
1145                 val ? "value" : "all values",
1146                 op->o_ndn.bv_val ?  op->o_ndn.bv_val : "",
1147                 accessmask2str( *mask, accessmaskbuf, 1 ) );
1148
1149
1150         b = a->acl_access;
1151         i = 1;
1152
1153         for ( ; b != NULL; b = b->a_next, i++ ) {
1154                 slap_mask_t oldmask, modmask;
1155
1156                 ACL_INVALIDATE( modmask );
1157
1158                 /* AND <who> clauses */
1159                 if ( !BER_BVISEMPTY( &b->a_dn_pat ) ) {
1160                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
1161                                 b->a_dn_pat.bv_val, 0, 0);
1162                         /*
1163                          * if access applies to the entry itself, and the
1164                          * user is bound as somebody in the same namespace as
1165                          * the entry, OR the given dn matches the dn pattern
1166                          */
1167                         /*
1168                          * NOTE: styles "anonymous", "users" and "self"
1169                          * have been moved to enum slap_style_t, whose
1170                          * value is set in a_dn_style; however, the string
1171                          * is maintained in a_dn_pat.
1172                          */
1173
1174                         if ( acl_mask_dn( op, e, val, a, matches,
1175                                 &b->a_dn, &op->o_ndn ) )
1176                         {
1177                                 continue;
1178                         }
1179                 }
1180
1181                 if ( !BER_BVISEMPTY( &b->a_realdn_pat ) ) {
1182                         struct berval   ndn;
1183
1184                         Debug( LDAP_DEBUG_ACL, "<= check a_realdn_pat: %s\n",
1185                                 b->a_realdn_pat.bv_val, 0, 0);
1186                         /*
1187                          * if access applies to the entry itself, and the
1188                          * user is bound as somebody in the same namespace as
1189                          * the entry, OR the given dn matches the dn pattern
1190                          */
1191                         /*
1192                          * NOTE: styles "anonymous", "users" and "self"
1193                          * have been moved to enum slap_style_t, whose
1194                          * value is set in a_dn_style; however, the string
1195                          * is maintained in a_dn_pat.
1196                          */
1197
1198                         if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) )
1199                         {
1200                                 ndn = op->o_conn->c_ndn;
1201                         } else {
1202                                 ndn = op->o_ndn;
1203                         }
1204
1205                         if ( acl_mask_dn( op, e, val, a, matches,
1206                                 &b->a_realdn, &ndn ) )
1207                         {
1208                                 continue;
1209                         }
1210                 }
1211
1212                 if ( !BER_BVISEMPTY( &b->a_sockurl_pat ) ) {
1213                         if ( ! op->o_conn->c_listener ) {
1214                                 continue;
1215                         }
1216                         Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
1217                                 b->a_sockurl_pat.bv_val, 0, 0 );
1218
1219                         if ( !ber_bvccmp( &b->a_sockurl_pat, '*' ) ) {
1220                                 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
1221                                         if ( !regex_matches( &b->a_sockurl_pat, op->o_conn->c_listener_url.bv_val,
1222                                                         &e->e_nname, val, matches ) )
1223                                         {
1224                                                 continue;
1225                                         }
1226
1227                                 } else if ( b->a_sockurl_style == ACL_STYLE_EXPAND ) {
1228                                         struct berval   bv;
1229                                         char buf[ACL_BUF_SIZE];
1230
1231                                         bv.bv_len = sizeof( buf ) - 1;
1232                                         bv.bv_val = buf;
1233                                         if ( acl_string_expand( &bv, &b->a_sockurl_pat, &e->e_nname, val, matches ) )
1234                                         {
1235                                                 continue;
1236                                         }
1237
1238                                         if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_listener_url ) != 0 )
1239                                         {
1240                                                 continue;
1241                                         }
1242
1243                                 } else {
1244                                         if ( ber_bvstrcasecmp( &b->a_sockurl_pat, &op->o_conn->c_listener_url ) != 0 )
1245                                         {
1246                                                 continue;
1247                                         }
1248                                 }
1249                         }
1250                 }
1251
1252                 if ( !BER_BVISEMPTY( &b->a_domain_pat ) ) {
1253                         if ( !op->o_conn->c_peer_domain.bv_val ) {
1254                                 continue;
1255                         }
1256                         Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
1257                                 b->a_domain_pat.bv_val, 0, 0 );
1258                         if ( !ber_bvccmp( &b->a_domain_pat, '*' ) ) {
1259                                 if ( b->a_domain_style == ACL_STYLE_REGEX) {
1260                                         if ( !regex_matches( &b->a_domain_pat, op->o_conn->c_peer_domain.bv_val,
1261                                                         &e->e_nname, val, matches ) )
1262                                         {
1263                                                 continue;
1264                                         }
1265                                 } else {
1266                                         char buf[ACL_BUF_SIZE];
1267
1268                                         struct berval   cmp = op->o_conn->c_peer_domain;
1269                                         struct berval   pat = b->a_domain_pat;
1270
1271                                         if ( b->a_domain_expand ) {
1272                                                 struct berval bv;
1273
1274                                                 bv.bv_len = sizeof(buf) - 1;
1275                                                 bv.bv_val = buf;
1276
1277                                                 if ( acl_string_expand(&bv, &b->a_domain_pat, &e->e_nname, val, matches) )
1278                                                 {
1279                                                         continue;
1280                                                 }
1281                                                 pat = bv;
1282                                         }
1283
1284                                         if ( b->a_domain_style == ACL_STYLE_SUBTREE ) {
1285                                                 int offset = cmp.bv_len - pat.bv_len;
1286                                                 if ( offset < 0 ) {
1287                                                         continue;
1288                                                 }
1289
1290                                                 if ( offset == 1 || ( offset > 1 && cmp.bv_val[ offset - 1 ] != '.' ) ) {
1291                                                         continue;
1292                                                 }
1293
1294                                                 /* trim the domain */
1295                                                 cmp.bv_val = &cmp.bv_val[ offset ];
1296                                                 cmp.bv_len -= offset;
1297                                         }
1298
1299                                         if ( ber_bvstrcasecmp( &pat, &cmp ) != 0 ) {
1300                                                 continue;
1301                                         }
1302                                 }
1303                         }
1304                 }
1305
1306                 if ( !BER_BVISEMPTY( &b->a_peername_pat ) ) {
1307                         if ( !op->o_conn->c_peer_name.bv_val ) {
1308                                 continue;
1309                         }
1310                         Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
1311                                 b->a_peername_pat.bv_val, 0, 0 );
1312                         if ( !ber_bvccmp( &b->a_peername_pat, '*' ) ) {
1313                                 if ( b->a_peername_style == ACL_STYLE_REGEX ) {
1314                                         if ( !regex_matches( &b->a_peername_pat, op->o_conn->c_peer_name.bv_val,
1315                                                         &e->e_nname, val, matches ) )
1316                                         {
1317                                                 continue;
1318                                         }
1319
1320                                 } else {
1321                                         /* try exact match */
1322                                         if ( b->a_peername_style == ACL_STYLE_BASE ) {
1323                                                 if ( ber_bvstrcasecmp( &b->a_peername_pat, &op->o_conn->c_peer_name ) != 0 ) {
1324                                                         continue;
1325                                                 }
1326
1327                                         } else if ( b->a_peername_style == ACL_STYLE_EXPAND ) {
1328                                                 struct berval   bv;
1329                                                 char buf[ACL_BUF_SIZE];
1330
1331                                                 bv.bv_len = sizeof( buf ) - 1;
1332                                                 bv.bv_val = buf;
1333                                                 if ( acl_string_expand( &bv, &b->a_peername_pat, &e->e_nname, val, matches ) )
1334                                                 {
1335                                                         continue;
1336                                                 }
1337
1338                                                 if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_peer_name ) != 0 ) {
1339                                                         continue;
1340                                                 }
1341
1342                                         /* extract IP and try exact match */
1343                                         } else if ( b->a_peername_style == ACL_STYLE_IP ) {
1344                                                 char            *port;
1345                                                 char            buf[STRLENOF("255.255.255.255") + 1];
1346                                                 struct berval   ip;
1347                                                 unsigned long   addr;
1348                                                 int             port_number = -1;
1349
1350                                                 if ( strncasecmp( op->o_conn->c_peer_name.bv_val,
1351                                                                         acl_bv_ip_eq.bv_val,
1352                                                                         acl_bv_ip_eq.bv_len ) != 0 )
1353                                                         continue;
1354
1355                                                 ip.bv_val = op->o_conn->c_peer_name.bv_val + acl_bv_ip_eq.bv_len;
1356                                                 ip.bv_len = op->o_conn->c_peer_name.bv_len - acl_bv_ip_eq.bv_len;
1357
1358                                                 port = strrchr( ip.bv_val, ':' );
1359                                                 if ( port ) {
1360                                                         ip.bv_len = port - ip.bv_val;
1361                                                         ++port;
1362                                                         if ( lutil_atoi( &port_number, port ) != 0 )
1363                                                                 continue;
1364                                                 }
1365
1366                                                 /* the port check can be anticipated here */
1367                                                 if ( b->a_peername_port != -1 && port_number != b->a_peername_port )
1368                                                         continue;
1369
1370                                                 /* address longer than expected? */
1371                                                 if ( ip.bv_len >= sizeof(buf) )
1372                                                         continue;
1373
1374                                                 AC_MEMCPY( buf, ip.bv_val, ip.bv_len );
1375                                                 buf[ ip.bv_len ] = '\0';
1376
1377                                                 addr = inet_addr( buf );
1378
1379                                                 /* unable to convert? */
1380                                                 if ( addr == (unsigned long)(-1) )
1381                                                         continue;
1382
1383                                                 if ( (addr & b->a_peername_mask) != b->a_peername_addr )
1384                                                         continue;
1385
1386 #ifdef LDAP_PF_INET6
1387                                         /* extract IPv6 and try exact match */
1388                                         } else if ( b->a_peername_style == ACL_STYLE_IPV6 ) {
1389                                                 char            *port;
1390                                                 char            buf[STRLENOF("FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF") + 1];
1391                                                 struct berval   ip;
1392                                                 struct in6_addr addr;
1393                                                 int             port_number = -1;
1394
1395                                                 if ( strncasecmp( op->o_conn->c_peer_name.bv_val,
1396                                                                         acl_bv_ipv6_eq.bv_val,
1397                                                                         acl_bv_ipv6_eq.bv_len ) != 0 )
1398                                                         continue;
1399
1400                                                 ip.bv_val = op->o_conn->c_peer_name.bv_val + acl_bv_ipv6_eq.bv_len;
1401                                                 ip.bv_len = op->o_conn->c_peer_name.bv_len - acl_bv_ipv6_eq.bv_len;
1402
1403                                                 port = strrchr( ip.bv_val, ']' );
1404                                                 if ( port ) {
1405                                                         ip.bv_len = port - ip.bv_val;
1406                                                         ++port;
1407                                                         if ( port[0] == ':' && lutil_atoi( &port_number, ++port ) != 0 )
1408                                                                 continue;
1409                                                 }
1410
1411                                                 /* the port check can be anticipated here */
1412                                                 if ( b->a_peername_port != -1 && port_number != b->a_peername_port )
1413                                                         continue;
1414
1415                                                 /* address longer than expected? */
1416                                                 if ( ip.bv_len >= sizeof(buf) )
1417                                                         continue;
1418
1419                                                 AC_MEMCPY( buf, ip.bv_val, ip.bv_len );
1420                                                 buf[ ip.bv_len ] = '\0';
1421
1422                                                 if ( inet_pton( AF_INET6, buf, &addr ) != 1 )
1423                                                         continue;
1424
1425                                                 /* check mask */
1426                                                 if ( !slap_addr6_mask( &addr, &b->a_peername_mask6, &b->a_peername_addr6 ) )
1427                                                         continue;
1428 #endif /* LDAP_PF_INET6 */
1429
1430 #ifdef LDAP_PF_LOCAL
1431                                         /* extract path and try exact match */
1432                                         } else if ( b->a_peername_style == ACL_STYLE_PATH ) {
1433                                                 struct berval path;
1434
1435                                                 if ( strncmp( op->o_conn->c_peer_name.bv_val,
1436                                                                         acl_bv_path_eq.bv_val,
1437                                                                         acl_bv_path_eq.bv_len ) != 0 )
1438                                                         continue;
1439
1440                                                 path.bv_val = op->o_conn->c_peer_name.bv_val
1441                                                         + acl_bv_path_eq.bv_len;
1442                                                 path.bv_len = op->o_conn->c_peer_name.bv_len
1443                                                         - acl_bv_path_eq.bv_len;
1444
1445                                                 if ( ber_bvcmp( &b->a_peername_pat, &path ) != 0 )
1446                                                         continue;
1447
1448 #endif /* LDAP_PF_LOCAL */
1449
1450                                         /* exact match (very unlikely...) */
1451                                         } else if ( ber_bvcmp( &op->o_conn->c_peer_name, &b->a_peername_pat ) != 0 ) {
1452                                                         continue;
1453                                         }
1454                                 }
1455                         }
1456                 }
1457
1458                 if ( !BER_BVISEMPTY( &b->a_sockname_pat ) ) {
1459                         if ( BER_BVISNULL( &op->o_conn->c_sock_name ) ) {
1460                                 continue;
1461                         }
1462                         Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
1463                                 b->a_sockname_pat.bv_val, 0, 0 );
1464                         if ( !ber_bvccmp( &b->a_sockname_pat, '*' ) ) {
1465                                 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
1466                                         if ( !regex_matches( &b->a_sockname_pat, op->o_conn->c_sock_name.bv_val,
1467                                                         &e->e_nname, val, matches ) )
1468                                         {
1469                                                 continue;
1470                                         }
1471
1472                                 } else if ( b->a_sockname_style == ACL_STYLE_EXPAND ) {
1473                                         struct berval   bv;
1474                                         char buf[ACL_BUF_SIZE];
1475
1476                                         bv.bv_len = sizeof( buf ) - 1;
1477                                         bv.bv_val = buf;
1478                                         if ( acl_string_expand( &bv, &b->a_sockname_pat, &e->e_nname, val, matches ) )
1479                                         {
1480                                                 continue;
1481                                         }
1482
1483                                         if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_sock_name ) != 0 ) {
1484                                                 continue;
1485                                         }
1486
1487                                 } else {
1488                                         if ( ber_bvstrcasecmp( &b->a_sockname_pat, &op->o_conn->c_sock_name ) != 0 ) {
1489                                                 continue;
1490                                         }
1491                                 }
1492                         }
1493                 }
1494
1495                 if ( b->a_dn_at != NULL ) {
1496                         if ( acl_mask_dnattr( op, e, val, a,
1497                                         count, state, mask,
1498                                         &b->a_dn, &op->o_ndn ) )
1499                         {
1500                                 continue;
1501                         }
1502                 }
1503
1504                 if ( b->a_realdn_at != NULL ) {
1505                         struct berval   ndn;
1506
1507                         if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) )
1508                         {
1509                                 ndn = op->o_conn->c_ndn;
1510                         } else {
1511                                 ndn = op->o_ndn;
1512                         }
1513
1514                         if ( acl_mask_dnattr( op, e, val, a,
1515                                         count, state, mask,
1516                                         &b->a_realdn, &ndn ) )
1517                         {
1518                                 continue;
1519                         }
1520                 }
1521
1522                 if ( !BER_BVISEMPTY( &b->a_group_pat ) ) {
1523                         struct berval bv;
1524                         struct berval ndn = BER_BVNULL;
1525                         int rc;
1526
1527                         if ( op->o_ndn.bv_len == 0 ) {
1528                                 continue;
1529                         }
1530
1531                         Debug( LDAP_DEBUG_ACL, "<= check a_group_pat: %s\n",
1532                                 b->a_group_pat.bv_val, 0, 0 );
1533
1534                         /* b->a_group is an unexpanded entry name, expanded it should be an
1535                          * entry with objectclass group* and we test to see if odn is one of
1536                          * the values in the attribute group
1537                          */
1538                         /* see if asker is listed in dnattr */
1539                         if ( b->a_group_style == ACL_STYLE_EXPAND ) {
1540                                 char            buf[ACL_BUF_SIZE];
1541                                 AclRegexMatches tmp_matches,
1542                                                 *tmp_matchesp = &tmp_matches;
1543                                 regmatch_t      *tmp_data;
1544
1545                                 MATCHES_MEMSET( &tmp_matches );
1546                                 tmp_data = &tmp_matches.dn_data[0];
1547
1548                                 bv.bv_len = sizeof(buf) - 1;
1549                                 bv.bv_val = buf;
1550
1551                                 rc = 0;
1552
1553                                 if ( a->acl_attrval_style == ACL_STYLE_REGEX )
1554                                         tmp_matchesp = matches;
1555                                 else switch ( a->acl_dn_style ) {
1556                                 case ACL_STYLE_REGEX:
1557                                         if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1558                                                 tmp_matchesp = matches;
1559                                                 break;
1560                                         }
1561
1562                                 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1563                                 case ACL_STYLE_BASE:
1564                                         tmp_data[0].rm_so = 0;
1565                                         tmp_data[0].rm_eo = e->e_nname.bv_len;
1566                                         tmp_matches.dn_count = 1;
1567                                         break;
1568
1569                                 case ACL_STYLE_ONE:
1570                                 case ACL_STYLE_SUBTREE:
1571                                 case ACL_STYLE_CHILDREN:
1572                                         tmp_data[0].rm_so = 0;
1573                                         tmp_data[0].rm_eo = e->e_nname.bv_len;
1574
1575                                         tmp_data[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1576                                         tmp_data[1].rm_eo = e->e_nname.bv_len;
1577                                         tmp_matches.dn_count = 2;
1578                                         break;
1579
1580                                 default:
1581                                         /* error */
1582                                         rc = 1;
1583                                         break;
1584                                 }
1585
1586                                 if ( rc ) {
1587                                         continue;
1588                                 }
1589
1590                                 if ( acl_string_expand( &bv, &b->a_group_pat,
1591                                                 &e->e_nname, val,
1592                                                 tmp_matchesp ) )
1593                                 {
1594                                         continue;
1595                                 }
1596
1597                                 if ( dnNormalize( 0, NULL, NULL, &bv, &ndn,
1598                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1599                                 {
1600                                         /* did not expand to a valid dn */
1601                                         continue;
1602                                 }
1603
1604                                 bv = ndn;
1605
1606                         } else {
1607                                 bv = b->a_group_pat;
1608                         }
1609
1610                         rc = backend_group( op, e, &bv, &op->o_ndn,
1611                                 b->a_group_oc, b->a_group_at );
1612
1613                         if ( ndn.bv_val ) {
1614                                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
1615                         }
1616
1617                         if ( rc != 0 ) {
1618                                 continue;
1619                         }
1620                 }
1621
1622                 if ( !BER_BVISEMPTY( &b->a_set_pat ) ) {
1623                         struct berval   bv;
1624                         char            buf[ACL_BUF_SIZE];
1625
1626                         Debug( LDAP_DEBUG_ACL, "<= check a_set_pat: %s\n",
1627                                 b->a_set_pat.bv_val, 0, 0 );
1628
1629                         if ( b->a_set_style == ACL_STYLE_EXPAND ) {
1630                                 AclRegexMatches tmp_matches,
1631                                                 *tmp_matchesp = &tmp_matches;
1632                                 int             rc = 0;
1633                                 regmatch_t      *tmp_data;
1634
1635                                 MATCHES_MEMSET( &tmp_matches );
1636                                 tmp_data = &tmp_matches.dn_data[0];
1637
1638                                 bv.bv_len = sizeof( buf ) - 1;
1639                                 bv.bv_val = buf;
1640
1641                                 rc = 0;
1642
1643                                 if ( a->acl_attrval_style == ACL_STYLE_REGEX )
1644                                         tmp_matchesp = matches;
1645                                 else switch ( a->acl_dn_style ) {
1646                                 case ACL_STYLE_REGEX:
1647                                         if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1648                                                 tmp_matchesp = matches;
1649                                                 break;
1650                                         }
1651
1652                                 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1653                                 case ACL_STYLE_BASE:
1654                                         tmp_data[0].rm_so = 0;
1655                                         tmp_data[0].rm_eo = e->e_nname.bv_len;
1656                                         tmp_matches.dn_count = 1;
1657                                         break;
1658
1659                                 case ACL_STYLE_ONE:
1660                                 case ACL_STYLE_SUBTREE:
1661                                 case ACL_STYLE_CHILDREN:
1662                                         tmp_data[0].rm_so = 0;
1663                                         tmp_data[0].rm_eo = e->e_nname.bv_len;
1664                                         tmp_data[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1665                                         tmp_data[1].rm_eo = e->e_nname.bv_len; tmp_matches.dn_count = 2;
1666                                         break;
1667
1668                                 default:
1669                                         /* error */
1670                                         rc = 1;
1671                                         break;
1672                                 }
1673
1674                                 if ( rc ) {
1675                                         continue;
1676                                 }
1677
1678                                 if ( acl_string_expand( &bv, &b->a_set_pat,
1679                                                 &e->e_nname, val,
1680                                                 tmp_matchesp ) )
1681                                 {
1682                                         continue;
1683                                 }
1684
1685                         } else {
1686                                 bv = b->a_set_pat;
1687                         }
1688
1689                         if ( acl_match_set( &bv, op, e, NULL ) == 0 ) {
1690                                 continue;
1691                         }
1692                 }
1693
1694                 if ( b->a_authz.sai_ssf ) {
1695                         Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
1696                                 b->a_authz.sai_ssf, op->o_ssf, 0 );
1697                         if ( b->a_authz.sai_ssf >  op->o_ssf ) {
1698                                 continue;
1699                         }
1700                 }
1701
1702                 if ( b->a_authz.sai_transport_ssf ) {
1703                         Debug( LDAP_DEBUG_ACL,
1704                                 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
1705                                 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
1706                         if ( b->a_authz.sai_transport_ssf >  op->o_transport_ssf ) {
1707                                 continue;
1708                         }
1709                 }
1710
1711                 if ( b->a_authz.sai_tls_ssf ) {
1712                         Debug( LDAP_DEBUG_ACL,
1713                                 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
1714                                 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
1715                         if ( b->a_authz.sai_tls_ssf >  op->o_tls_ssf ) {
1716                                 continue;
1717                         }
1718                 }
1719
1720                 if ( b->a_authz.sai_sasl_ssf ) {
1721                         Debug( LDAP_DEBUG_ACL,
1722                                 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
1723                                 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
1724                         if ( b->a_authz.sai_sasl_ssf >  op->o_sasl_ssf ) {
1725                                 continue;
1726                         }
1727                 }
1728
1729                 /* check for the "self" modifier in the <access> field */
1730                 if ( b->a_dn.a_self ) {
1731                         const char *dummy;
1732                         int rc, match = 0;
1733
1734                         ACL_RECORD_VALUE_STATE;
1735
1736                         /* must have DN syntax */
1737                         if ( desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName &&
1738                                 !is_at_syntax( desc->ad_type, SLAPD_NAMEUID_SYNTAX )) continue;
1739
1740                         /* check if the target is an attribute. */
1741                         if ( val == NULL ) continue;
1742
1743                         /* a DN must be present */
1744                         if ( BER_BVISEMPTY( &op->o_ndn ) ) {
1745                                 continue;
1746                         }
1747
1748                         /* target is attribute, check if the attribute value
1749                          * is the op dn.
1750                          */
1751                         rc = value_match( &match, desc,
1752                                 desc->ad_type->sat_equality, 0,
1753                                 val, &op->o_ndn, &dummy );
1754                         /* on match error or no match, fail the ACL clause */
1755                         if ( rc != LDAP_SUCCESS || match != 0 )
1756                                 continue;
1757                 }
1758
1759 #ifdef SLAP_DYNACL
1760                 if ( b->a_dynacl ) {
1761                         slap_dynacl_t   *da;
1762                         slap_access_t   tgrant, tdeny;
1763
1764                         Debug( LDAP_DEBUG_ACL, "<= check a_dynacl\n",
1765                                 0, 0, 0 );
1766
1767                         /* this case works different from the others above.
1768                          * since dynamic ACL's themselves give permissions, we need
1769                          * to first check b->a_access_mask, the ACL's access level.
1770                          */
1771                         /* first check if the right being requested
1772                          * is allowed by the ACL clause.
1773                          */
1774                         if ( ! ACL_PRIV_ISSET( b->a_access_mask, a2pmask ) ) {
1775                                 continue;
1776                         }
1777
1778                         /* start out with nothing granted, nothing denied */
1779                         ACL_INVALIDATE(tgrant);
1780                         ACL_INVALIDATE(tdeny);
1781
1782                         for ( da = b->a_dynacl; da; da = da->da_next ) {
1783                                 slap_access_t   grant,
1784                                                 deny;
1785
1786                                 ACL_INVALIDATE(grant);
1787                                 ACL_INVALIDATE(deny);
1788
1789                                 Debug( LDAP_DEBUG_ACL, "    <= check a_dynacl: %s\n",
1790                                         da->da_name, 0, 0 );
1791
1792                                 /*
1793                                  * XXXmanu Only DN matches are supplied
1794                                  * sending attribute values matches require
1795                                  * an API update
1796                                  */
1797                                 (void)da->da_mask( da->da_private, op, e, desc,
1798                                         val, matches->dn_count, matches->dn_data,
1799                                         &grant, &deny );
1800
1801                                 tgrant |= grant;
1802                                 tdeny |= deny;
1803                         }
1804
1805                         /* remove anything that the ACL clause does not allow */
1806                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
1807                         tdeny &= ACL_PRIV_MASK;
1808
1809                         /* see if we have anything to contribute */
1810                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
1811                                 continue;
1812                         }
1813
1814                         /* this could be improved by changing slap_acl_mask so that it can deal with
1815                          * by clauses that return grant/deny pairs.  Right now, it does either
1816                          * additive or subtractive rights, but not both at the same time.  So,
1817                          * we need to combine the grant/deny pair into a single rights mask in
1818                          * a smart way:  if either grant or deny is "empty", then we use the
1819                          * opposite as is, otherwise we remove any denied rights from the grant
1820                          * rights mask and construct an additive mask.
1821                          */
1822                         if (ACL_IS_INVALID(tdeny)) {
1823                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
1824
1825                         } else if (ACL_IS_INVALID(tgrant)) {
1826                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
1827
1828                         } else {
1829                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
1830                         }
1831
1832                 } else
1833 #endif /* SLAP_DYNACL */
1834                 {
1835                         modmask = b->a_access_mask;
1836                 }
1837
1838                 Debug( LDAP_DEBUG_ACL,
1839                         "<= acl_mask: [%d] applying %s (%s)\n",
1840                         i, accessmask2str( modmask, accessmaskbuf, 1 ),
1841                         b->a_type == ACL_CONTINUE
1842                                 ? "continue"
1843                                 : b->a_type == ACL_BREAK
1844                                         ? "break"
1845                                         : "stop" );
1846                 /* save old mask */
1847                 oldmask = *mask;
1848
1849                 if( ACL_IS_ADDITIVE(modmask) ) {
1850                         /* add privs */
1851                         ACL_PRIV_SET( *mask, modmask );
1852
1853                         /* cleanup */
1854                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
1855
1856                 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
1857                         /* substract privs */
1858                         ACL_PRIV_CLR( *mask, modmask );
1859
1860                         /* cleanup */
1861                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
1862
1863                 } else {
1864                         /* assign privs */
1865                         *mask = modmask;
1866                 }
1867
1868                 Debug( LDAP_DEBUG_ACL,
1869                         "<= acl_mask: [%d] mask: %s\n",
1870                         i, accessmask2str(*mask, accessmaskbuf, 1), 0 );
1871
1872                 if( b->a_type == ACL_CONTINUE ) {
1873                         continue;
1874
1875                 } else if ( b->a_type == ACL_BREAK ) {
1876                         return ACL_BREAK;
1877
1878                 } else {
1879                         return ACL_STOP;
1880                 }
1881         }
1882
1883         /* implicit "by * none" clause */
1884         ACL_INIT(*mask);
1885
1886         Debug( LDAP_DEBUG_ACL,
1887                 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
1888                 accessmask2str(*mask, accessmaskbuf, 1), 0, 0 );
1889         return ACL_STOP;
1890 }
1891
1892 /*
1893  * acl_check_modlist - check access control on the given entry to see if
1894  * it allows the given modifications by the user associated with op.
1895  * returns      1       if mods allowed ok
1896  *              0       mods not allowed
1897  */
1898
1899 int
1900 acl_check_modlist(
1901         Operation       *op,
1902         Entry   *e,
1903         Modifications   *mlist )
1904 {
1905         struct berval *bv;
1906         AccessControlState state = ACL_STATE_INIT;
1907         Backend *be;
1908         int be_null = 0;
1909         int ret = 1; /* default is access allowed */
1910
1911         be = op->o_bd;
1912         if ( be == NULL ) {
1913                 be = LDAP_STAILQ_FIRST(&backendDB);
1914                 be_null = 1;
1915                 op->o_bd = be;
1916         }
1917         assert( be != NULL );
1918
1919         /* If ADD attribute checking is not enabled, just allow it */
1920         if ( op->o_tag == LDAP_REQ_ADD && !SLAP_DBACL_ADD( be ))
1921                 return 1;
1922
1923         /* short circuit root database access */
1924         if ( be_isroot( op ) ) {
1925                 Debug( LDAP_DEBUG_ACL,
1926                         "<= acl_access_allowed: granted to database root\n",
1927                     0, 0, 0 );
1928                 goto done;
1929         }
1930
1931         /* use backend default access if no backend acls */
1932         if( op->o_bd != NULL && op->o_bd->be_acl == NULL && frontendDB->be_acl == NULL ) {
1933                 Debug( LDAP_DEBUG_ACL,
1934                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
1935                         access2str( ACL_WRITE ),
1936                         op->o_bd->be_dfltaccess >= ACL_WRITE
1937                                 ? "granted" : "denied",
1938                         op->o_dn.bv_val );
1939                 ret = (op->o_bd->be_dfltaccess >= ACL_WRITE);
1940                 goto done;
1941         }
1942
1943         for ( ; mlist != NULL; mlist = mlist->sml_next ) {
1944                 /*
1945                  * Internal mods are ignored by ACL_WRITE checking
1946                  */
1947                 if ( mlist->sml_flags & SLAP_MOD_INTERNAL ) {
1948                         Debug( LDAP_DEBUG_ACL, "acl: internal mod %s:"
1949                                 " modify access granted\n",
1950                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1951                         continue;
1952                 }
1953
1954                 /*
1955                  * no-user-modification operational attributes are ignored
1956                  * by ACL_WRITE checking as any found here are not provided
1957                  * by the user
1958                  */
1959                 if ( is_at_no_user_mod( mlist->sml_desc->ad_type )
1960                                 && ! ( mlist->sml_flags & SLAP_MOD_MANAGING ) )
1961                 {
1962                         Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
1963                                 " modify access granted\n",
1964                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1965                         continue;
1966                 }
1967
1968                 switch ( mlist->sml_op ) {
1969                 case LDAP_MOD_REPLACE:
1970                 case LDAP_MOD_INCREMENT:
1971                         /*
1972                          * We must check both permission to delete the whole
1973                          * attribute and permission to add the specific attributes.
1974                          * This prevents abuse from selfwriters.
1975                          */
1976                         if ( ! access_allowed( op, e,
1977                                 mlist->sml_desc, NULL,
1978                                 ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL,
1979                                 &state ) )
1980                         {
1981                                 ret = 0;
1982                                 goto done;
1983                         }
1984
1985                         if ( mlist->sml_values == NULL ) break;
1986
1987                         /* fall thru to check value to add */
1988
1989                 case LDAP_MOD_ADD:
1990                         assert( mlist->sml_values != NULL );
1991
1992                         for ( bv = mlist->sml_nvalues
1993                                         ? mlist->sml_nvalues : mlist->sml_values;
1994                                 bv->bv_val != NULL; bv++ )
1995                         {
1996                                 if ( ! access_allowed( op, e,
1997                                         mlist->sml_desc, bv,
1998                                         ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WADD,
1999                                         &state ) )
2000                                 {
2001                                         ret = 0;
2002                                         goto done;
2003                                 }
2004                         }
2005                         break;
2006
2007                 case LDAP_MOD_DELETE:
2008                         if ( mlist->sml_values == NULL ) {
2009                                 if ( ! access_allowed( op, e,
2010                                         mlist->sml_desc, NULL,
2011                                         ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL,
2012                                         &state ) )
2013                                 {
2014                                         ret = 0;
2015                                         goto done;
2016                                 }
2017                                 break;
2018                         }
2019                         for ( bv = mlist->sml_nvalues
2020                                         ? mlist->sml_nvalues : mlist->sml_values;
2021                                 bv->bv_val != NULL; bv++ )
2022                         {
2023                                 if ( ! access_allowed( op, e,
2024                                         mlist->sml_desc, bv,
2025                                         ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL,
2026                                         &state ) )
2027                                 {
2028                                         ret = 0;
2029                                         goto done;
2030                                 }
2031                         }
2032                         break;
2033
2034                 case SLAP_MOD_SOFTADD:
2035                         /* allow adding attribute via modrdn thru */
2036                         break;
2037
2038                 default:
2039                         assert( 0 );
2040                         /* not reached */
2041                         ret = 0;
2042                         break;
2043                 }
2044         }
2045
2046 done:
2047         if (be_null) op->o_bd = NULL;
2048         return( ret );
2049 }
2050
2051 int
2052 acl_get_part(
2053         struct berval   *list,
2054         int             ix,
2055         char            sep,
2056         struct berval   *bv )
2057 {
2058         int     len;
2059         char    *p;
2060
2061         if ( bv ) {
2062                 BER_BVZERO( bv );
2063         }
2064         len = list->bv_len;
2065         p = list->bv_val;
2066         while ( len >= 0 && --ix >= 0 ) {
2067                 while ( --len >= 0 && *p++ != sep )
2068                         ;
2069         }
2070         while ( len >= 0 && *p == ' ' ) {
2071                 len--;
2072                 p++;
2073         }
2074         if ( len < 0 ) {
2075                 return -1;
2076         }
2077
2078         if ( !bv ) {
2079                 return 0;
2080         }
2081
2082         bv->bv_val = p;
2083         while ( --len >= 0 && *p != sep ) {
2084                 bv->bv_len++;
2085                 p++;
2086         }
2087         while ( bv->bv_len > 0 && *--p == ' ' ) {
2088                 bv->bv_len--;
2089         }
2090
2091         return bv->bv_len;
2092 }
2093
2094 typedef struct acl_set_gather_t {
2095         SetCookie               *cookie;
2096         BerVarray               bvals;
2097 } acl_set_gather_t;
2098
2099 static int
2100 acl_set_cb_gather( Operation *op, SlapReply *rs )
2101 {
2102         acl_set_gather_t        *p = (acl_set_gather_t *)op->o_callback->sc_private;
2103
2104         if ( rs->sr_type == REP_SEARCH ) {
2105                 BerValue        bvals[ 2 ];
2106                 BerVarray       bvalsp = NULL;
2107                 int             j;
2108
2109                 for ( j = 0; !BER_BVISNULL( &rs->sr_attrs[ j ].an_name ); j++ ) {
2110                         AttributeDescription    *desc = rs->sr_attrs[ j ].an_desc;
2111
2112                         if ( desc == NULL ) {
2113                                 continue;
2114                         }
2115
2116                         if ( desc == slap_schema.si_ad_entryDN ) {
2117                                 bvalsp = bvals;
2118                                 bvals[ 0 ] = rs->sr_entry->e_nname;
2119                                 BER_BVZERO( &bvals[ 1 ] );
2120
2121                         } else {
2122                                 Attribute       *a;
2123
2124                                 a = attr_find( rs->sr_entry->e_attrs, desc );
2125                                 if ( a != NULL ) {
2126                                         bvalsp = a->a_nvals;
2127                                 }
2128                         }
2129
2130                         if ( bvalsp ) {
2131                                 p->bvals = slap_set_join( p->cookie, p->bvals,
2132                                                 ( '|' | SLAP_SET_RREF ), bvalsp );
2133                         }
2134                 }
2135
2136         } else {
2137                 switch ( rs->sr_type ) {
2138                 case REP_SEARCHREF:
2139                 case REP_INTERMEDIATE:
2140                         /* ignore */
2141                         break;
2142
2143                 default:
2144                         assert( rs->sr_type == REP_RESULT );
2145                         break;
2146                 }
2147         }
2148
2149         return 0;
2150 }
2151
2152 BerVarray
2153 acl_set_gather( SetCookie *cookie, struct berval *name, AttributeDescription *desc )
2154 {
2155         AclSetCookie            *cp = (AclSetCookie *)cookie;
2156         int                     rc = 0;
2157         LDAPURLDesc             *ludp = NULL;
2158         Operation               op2 = { 0 };
2159         SlapReply               rs = {REP_RESULT};
2160         AttributeName           anlist[ 2 ], *anlistp = NULL;
2161         int                     nattrs = 0;
2162         slap_callback           cb = { NULL, acl_set_cb_gather, NULL, NULL };
2163         acl_set_gather_t        p = { 0 };
2164
2165         /* this routine needs to return the bervals instead of
2166          * plain strings, since syntax is not known.  It should
2167          * also return the syntax or some "comparison cookie".
2168          */
2169         if ( strncasecmp( name->bv_val, "ldap:///", STRLENOF( "ldap:///" ) ) != 0 ) {
2170                 return acl_set_gather2( cookie, name, desc );
2171         }
2172
2173         rc = ldap_url_parse( name->bv_val, &ludp );
2174         if ( rc != LDAP_URL_SUCCESS ) {
2175                 Debug( LDAP_DEBUG_TRACE,
2176                         "%s acl_set_gather: unable to parse URL=\"%s\"\n",
2177                         cp->asc_op->o_log_prefix, name->bv_val, 0 );
2178
2179                 rc = LDAP_PROTOCOL_ERROR;
2180                 goto url_done;
2181         }
2182
2183         if ( ( ludp->lud_host && ludp->lud_host[0] ) || ludp->lud_exts )
2184         {
2185                 /* host part must be empty */
2186                 /* extensions parts must be empty */
2187                 Debug( LDAP_DEBUG_TRACE,
2188                         "%s acl_set_gather: host/exts must be absent in URL=\"%s\"\n",
2189                         cp->asc_op->o_log_prefix, name->bv_val, 0 );
2190
2191                 rc = LDAP_PROTOCOL_ERROR;
2192                 goto url_done;
2193         }
2194
2195         /* Grab the searchbase and see if an appropriate database can be found */
2196         ber_str2bv( ludp->lud_dn, 0, 0, &op2.o_req_dn );
2197         rc = dnNormalize( 0, NULL, NULL, &op2.o_req_dn,
2198                         &op2.o_req_ndn, cp->asc_op->o_tmpmemctx );
2199         BER_BVZERO( &op2.o_req_dn );
2200         if ( rc != LDAP_SUCCESS ) {
2201                 Debug( LDAP_DEBUG_TRACE,
2202                         "%s acl_set_gather: DN=\"%s\" normalize failed\n",
2203                         cp->asc_op->o_log_prefix, ludp->lud_dn, 0 );
2204
2205                 goto url_done;
2206         }
2207
2208         op2.o_bd = select_backend( &op2.o_req_ndn, 1 );
2209         if ( ( op2.o_bd == NULL ) || ( op2.o_bd->be_search == NULL ) ) {
2210                 Debug( LDAP_DEBUG_TRACE,
2211                         "%s acl_set_gather: no database could be selected for DN=\"%s\"\n",
2212                         cp->asc_op->o_log_prefix, op2.o_req_ndn.bv_val, 0 );
2213
2214                 rc = LDAP_NO_SUCH_OBJECT;
2215                 goto url_done;
2216         }
2217
2218         /* Grab the filter */
2219         if ( ludp->lud_filter ) {
2220                 ber_str2bv_x( ludp->lud_filter, 0, 0, &op2.ors_filterstr,
2221                                 cp->asc_op->o_tmpmemctx );
2222                 op2.ors_filter = str2filter_x( cp->asc_op, op2.ors_filterstr.bv_val );
2223                 if ( op2.ors_filter == NULL ) {
2224                         Debug( LDAP_DEBUG_TRACE,
2225                                 "%s acl_set_gather: unable to parse filter=\"%s\"\n",
2226                                 cp->asc_op->o_log_prefix, op2.ors_filterstr.bv_val, 0 );
2227
2228                         rc = LDAP_PROTOCOL_ERROR;
2229                         goto url_done;
2230                 }
2231
2232         } else {
2233                 op2.ors_filterstr = *slap_filterstr_objectClass_pres;
2234                 op2.ors_filter = (Filter *)slap_filter_objectClass_pres;
2235         }
2236
2237
2238         /* Grab the scope */
2239         op2.ors_scope = ludp->lud_scope;
2240
2241         /* Grap the attributes */
2242         if ( ludp->lud_attrs ) {
2243                 int i;
2244
2245                 for ( ; ludp->lud_attrs[ nattrs ]; nattrs++ )
2246                         ;
2247
2248                 anlistp = slap_sl_calloc( sizeof( AttributeName ), nattrs + 2,
2249                                 cp->asc_op->o_tmpmemctx );
2250
2251                 for ( i = 0, nattrs = 0; ludp->lud_attrs[ i ]; i++ ) {
2252                         struct berval           name;
2253                         AttributeDescription    *desc = NULL;
2254                         const char              *text = NULL;
2255
2256                         ber_str2bv( ludp->lud_attrs[ i ], 0, 0, &name );
2257                         rc = slap_bv2ad( &name, &desc, &text );
2258                         if ( rc == LDAP_SUCCESS ) {
2259                                 anlistp[ nattrs ].an_name = name;
2260                                 anlistp[ nattrs ].an_desc = desc;
2261                                 nattrs++;
2262                         }
2263                 }
2264
2265         } else {
2266                 anlistp = anlist;
2267         }
2268
2269         anlistp[ nattrs ].an_name = desc->ad_cname;
2270         anlistp[ nattrs ].an_desc = desc;
2271
2272         BER_BVZERO( &anlistp[ nattrs + 1 ].an_name );
2273
2274         p.cookie = cookie;
2275
2276         op2.o_hdr = cp->asc_op->o_hdr;
2277         op2.o_tag = LDAP_REQ_SEARCH;
2278         op2.o_ndn = op2.o_bd->be_rootndn;
2279         op2.o_callback = &cb;
2280         slap_op_time( &op2.o_time, &op2.o_tincr );
2281         op2.o_do_not_cache = 1;
2282         op2.o_is_auth_check = 0;
2283         ber_dupbv_x( &op2.o_req_dn, &op2.o_req_ndn, cp->asc_op->o_tmpmemctx );
2284         op2.ors_slimit = SLAP_NO_LIMIT;
2285         op2.ors_tlimit = SLAP_NO_LIMIT;
2286         op2.ors_attrs = anlistp;
2287         op2.ors_attrsonly = 0;
2288         op2.o_private = cp->asc_op->o_private;
2289         op2.o_extra = cp->asc_op->o_extra;
2290
2291         cb.sc_private = &p;
2292
2293         rc = op2.o_bd->be_search( &op2, &rs );
2294         if ( rc != 0 ) {
2295                 goto url_done;
2296         }
2297
2298 url_done:;
2299         if ( op2.ors_filter && op2.ors_filter != slap_filter_objectClass_pres ) {
2300                 filter_free_x( cp->asc_op, op2.ors_filter, 1 );
2301         }
2302         if ( !BER_BVISNULL( &op2.o_req_ndn ) ) {
2303                 slap_sl_free( op2.o_req_ndn.bv_val, cp->asc_op->o_tmpmemctx );
2304         }
2305         if ( !BER_BVISNULL( &op2.o_req_dn ) ) {
2306                 slap_sl_free( op2.o_req_dn.bv_val, cp->asc_op->o_tmpmemctx );
2307         }
2308         if ( ludp ) {
2309                 ldap_free_urldesc( ludp );
2310         }
2311         if ( anlistp && anlistp != anlist ) {
2312                 slap_sl_free( anlistp, cp->asc_op->o_tmpmemctx );
2313         }
2314
2315         return p.bvals;
2316 }
2317
2318 BerVarray
2319 acl_set_gather2( SetCookie *cookie, struct berval *name, AttributeDescription *desc )
2320 {
2321         AclSetCookie    *cp = (AclSetCookie *)cookie;
2322         BerVarray       bvals = NULL;
2323         struct berval   ndn;
2324         int             rc = 0;
2325
2326         /* this routine needs to return the bervals instead of
2327          * plain strings, since syntax is not known.  It should
2328          * also return the syntax or some "comparison cookie".
2329          */
2330         rc = dnNormalize( 0, NULL, NULL, name, &ndn, cp->asc_op->o_tmpmemctx );
2331         if ( rc == LDAP_SUCCESS ) {
2332                 if ( desc == slap_schema.si_ad_entryDN ) {
2333                         bvals = (BerVarray)slap_sl_malloc( sizeof( BerValue ) * 2,
2334                                         cp->asc_op->o_tmpmemctx );
2335                         bvals[ 0 ] = ndn;
2336                         BER_BVZERO( &bvals[ 1 ] );
2337                         BER_BVZERO( &ndn );
2338
2339                 } else {
2340                         backend_attribute( cp->asc_op,
2341                                 cp->asc_e, &ndn, desc, &bvals, ACL_NONE );
2342                 }
2343
2344                 if ( !BER_BVISNULL( &ndn ) ) {
2345                         slap_sl_free( ndn.bv_val, cp->asc_op->o_tmpmemctx );
2346                 }
2347         }
2348
2349         return bvals;
2350 }
2351
2352 int
2353 acl_match_set (
2354         struct berval *subj,
2355         Operation *op,
2356         Entry *e,
2357         struct berval *default_set_attribute )
2358 {
2359         struct berval   set = BER_BVNULL;
2360         int             rc = 0;
2361         AclSetCookie    cookie;
2362
2363         if ( default_set_attribute == NULL ) {
2364                 set = *subj;
2365
2366         } else {
2367                 struct berval           subjdn, ndn = BER_BVNULL;
2368                 struct berval           setat;
2369                 BerVarray               bvals = NULL;
2370                 const char              *text;
2371                 AttributeDescription    *desc = NULL;
2372
2373                 /* format of string is "entry/setAttrName" */
2374                 if ( acl_get_part( subj, 0, '/', &subjdn ) < 0 ) {
2375                         return 0;
2376                 }
2377
2378                 if ( acl_get_part( subj, 1, '/', &setat ) < 0 ) {
2379                         setat = *default_set_attribute;
2380                 }
2381
2382                 /*
2383                  * NOTE: dnNormalize honors the ber_len field
2384                  * as the length of the dn to be normalized
2385                  */
2386                 if ( slap_bv2ad( &setat, &desc, &text ) == LDAP_SUCCESS ) {
2387                         if ( dnNormalize( 0, NULL, NULL, &subjdn, &ndn, op->o_tmpmemctx ) == LDAP_SUCCESS )
2388                         {
2389                                 backend_attribute( op, e, &ndn, desc, &bvals, ACL_NONE );
2390                                 if ( bvals != NULL && !BER_BVISNULL( &bvals[0] ) ) {
2391                                         int     i;
2392
2393                                         set = bvals[0];
2394                                         BER_BVZERO( &bvals[0] );
2395                                         for ( i = 1; !BER_BVISNULL( &bvals[i] ); i++ )
2396                                                 /* count */ ;
2397                                         bvals[0].bv_val = bvals[i-1].bv_val;
2398                                         BER_BVZERO( &bvals[i-1] );
2399                                 }
2400                                 ber_bvarray_free_x( bvals, op->o_tmpmemctx );
2401                                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
2402                         }
2403                 }
2404         }
2405
2406         if ( !BER_BVISNULL( &set ) ) {
2407                 cookie.asc_op = op;
2408                 cookie.asc_e = e;
2409                 rc = ( slap_set_filter(
2410                         acl_set_gather,
2411                         (SetCookie *)&cookie, &set,
2412                         &op->o_ndn, &e->e_nname, NULL ) > 0 );
2413                 if ( set.bv_val != subj->bv_val ) {
2414                         slap_sl_free( set.bv_val, op->o_tmpmemctx );
2415                 }
2416         }
2417
2418         return(rc);
2419 }
2420
2421 #ifdef SLAP_DYNACL
2422
2423 /*
2424  * dynamic ACL infrastructure
2425  */
2426 static slap_dynacl_t    *da_list = NULL;
2427
2428 int
2429 slap_dynacl_register( slap_dynacl_t *da )
2430 {
2431         slap_dynacl_t   *tmp;
2432
2433         for ( tmp = da_list; tmp; tmp = tmp->da_next ) {
2434                 if ( strcasecmp( da->da_name, tmp->da_name ) == 0 ) {
2435                         break;
2436                 }
2437         }
2438
2439         if ( tmp != NULL ) {
2440                 return -1;
2441         }
2442
2443         if ( da->da_mask == NULL ) {
2444                 return -1;
2445         }
2446
2447         da->da_private = NULL;
2448         da->da_next = da_list;
2449         da_list = da;
2450
2451         return 0;
2452 }
2453
2454 static slap_dynacl_t *
2455 slap_dynacl_next( slap_dynacl_t *da )
2456 {
2457         if ( da ) {
2458                 return da->da_next;
2459         }
2460         return da_list;
2461 }
2462
2463 slap_dynacl_t *
2464 slap_dynacl_get( const char *name )
2465 {
2466         slap_dynacl_t   *da;
2467
2468         for ( da = slap_dynacl_next( NULL ); da; da = slap_dynacl_next( da ) ) {
2469                 if ( strcasecmp( da->da_name, name ) == 0 ) {
2470                         break;
2471                 }
2472         }
2473
2474         return da;
2475 }
2476 #endif /* SLAP_DYNACL */
2477
2478 /*
2479  * statically built-in dynamic ACL initialization
2480  */
2481 static int (*acl_init_func[])( void ) = {
2482 #ifdef SLAP_DYNACL
2483         /* TODO: remove when ACI will only be dynamic */
2484 #if SLAPD_ACI_ENABLED == SLAPD_MOD_STATIC
2485         dynacl_aci_init,
2486 #endif /* SLAPD_ACI_ENABLED */
2487 #endif /* SLAP_DYNACL */
2488
2489         NULL
2490 };
2491
2492 int
2493 acl_init( void )
2494 {
2495         int     i, rc;
2496
2497         for ( i = 0; acl_init_func[ i ] != NULL; i++ ) {
2498                 rc = (*(acl_init_func[ i ]))();
2499                 if ( rc != 0 ) {
2500                         return rc;
2501                 }
2502         }
2503
2504         return 0;
2505 }
2506
2507 int
2508 acl_string_expand(
2509         struct berval   *bv,
2510         struct berval   *pat,
2511         struct berval   *dn_matches,
2512         struct berval   *val_matches,
2513         AclRegexMatches *matches)
2514 {
2515         ber_len_t       size;
2516         char   *sp;
2517         char   *dp;
2518         int     flag;
2519         enum { DN_FLAG, VAL_FLAG } tflag;
2520
2521         size = 0;
2522         bv->bv_val[0] = '\0';
2523         bv->bv_len--; /* leave space for lone $ */
2524
2525         flag = 0;
2526         tflag = DN_FLAG;
2527         for ( dp = bv->bv_val, sp = pat->bv_val; size < bv->bv_len &&
2528                 sp < pat->bv_val + pat->bv_len ; sp++ )
2529         {
2530                 /* did we previously see a $ */
2531                 if ( flag ) {
2532                         if ( flag == 1 && *sp == '$' ) {
2533                                 *dp++ = '$';
2534                                 size++;
2535                                 flag = 0;
2536                                 tflag = DN_FLAG;
2537
2538                         } else if ( flag == 2 && *sp == 'v' /*'}'*/) {
2539                                 tflag = VAL_FLAG;
2540
2541                         } else if ( flag == 2 && *sp == 'd' /*'}'*/) {
2542                                 tflag = DN_FLAG;
2543
2544                         } else if ( flag == 1 && *sp == '{' /*'}'*/) {
2545                                 flag = 2;
2546
2547                         } else if ( *sp >= '0' && *sp <= '9' ) {
2548                                 int     nm;
2549                                 regmatch_t *m;
2550                                 char *data;
2551                                 int     n;
2552                                 int     i;
2553                                 int     l;
2554
2555                                 n = *sp - '0';
2556
2557                                 if ( flag == 2 ) {
2558                                         for ( sp++; *sp != '\0' && *sp != /*'{'*/ '}'; sp++ ) {
2559                                                 if ( *sp >= '0' && *sp <= '9' ) {
2560                                                         n = 10*n + ( *sp - '0' );
2561                                                 }
2562                                         }
2563
2564                                         if ( *sp != /*'{'*/ '}' ) {
2565                                                 /* FIXME: error */
2566                                                 return 1;
2567                                         }
2568                                 }
2569
2570                                 switch (tflag) {
2571                                 case DN_FLAG:
2572                                         nm = matches->dn_count;
2573                                         m = matches->dn_data;
2574                                         data = dn_matches ? dn_matches->bv_val : NULL;
2575                                         break;
2576                                 case VAL_FLAG:
2577                                         nm = matches->val_count;
2578                                         m = matches->val_data;
2579                                         data = val_matches ? val_matches->bv_val : NULL;
2580                                         break;
2581                                 default:
2582                                         assert( 0 );
2583                                 }
2584                                 if ( n >= nm ) {
2585                                         /* FIXME: error */
2586                                         return 1;
2587                                 }
2588                                 if ( data == NULL ) {
2589                                         /* FIXME: error */
2590                                         return 1;
2591                                 }
2592
2593                                 *dp = '\0';
2594                                 i = m[n].rm_so;
2595                                 l = m[n].rm_eo;
2596
2597                                 for ( ; size < bv->bv_len && i < l; size++, i++ ) {
2598                                         *dp++ = data[i];
2599                                 }
2600                                 *dp = '\0';
2601
2602                                 flag = 0;
2603                                 tflag = DN_FLAG;
2604                         }
2605                 } else {
2606                         if (*sp == '$') {
2607                                 flag = 1;
2608                         } else {
2609                                 *dp++ = *sp;
2610                                 size++;
2611                         }
2612                 }
2613         }
2614
2615         if ( flag ) {
2616                 /* must have ended with a single $ */
2617                 *dp++ = '$';
2618                 size++;
2619         }
2620
2621         *dp = '\0';
2622         bv->bv_len = size;
2623
2624         Debug( LDAP_DEBUG_ACL, "=> acl_string_expand: pattern:  %.*s\n", (int)pat->bv_len, pat->bv_val, 0 );
2625         Debug( LDAP_DEBUG_ACL, "=> acl_string_expand: expanded: %s\n", bv->bv_val, 0, 0 );
2626
2627         return 0;
2628 }
2629
2630 static int
2631 regex_matches(
2632         struct berval   *pat,           /* pattern to expand and match against */
2633         char            *str,           /* string to match against pattern */
2634         struct berval   *dn_matches,    /* buffer with $N expansion variables from DN */
2635         struct berval   *val_matches,   /* buffer with $N expansion variables from val */
2636         AclRegexMatches *matches        /* offsets in buffer for $N expansion variables */
2637 )
2638 {
2639         regex_t re;
2640         char newbuf[ACL_BUF_SIZE];
2641         struct berval bv;
2642         int     rc;
2643
2644         bv.bv_len = sizeof( newbuf ) - 1;
2645         bv.bv_val = newbuf;
2646
2647         if (str == NULL) {
2648                 str = "";
2649         };
2650
2651         acl_string_expand( &bv, pat, dn_matches, val_matches, matches );
2652         rc = regcomp( &re, newbuf, REG_EXTENDED|REG_ICASE );
2653         if ( rc ) {
2654                 char error[ACL_BUF_SIZE];
2655                 regerror( rc, &re, error, sizeof( error ) );
2656
2657                 Debug( LDAP_DEBUG_TRACE,
2658                     "compile( \"%s\", \"%s\") failed %s\n",
2659                         pat->bv_val, str, error );
2660                 return( 0 );
2661         }
2662
2663         rc = regexec( &re, str, 0, NULL, 0 );
2664         regfree( &re );
2665
2666         Debug( LDAP_DEBUG_TRACE,
2667             "=> regex_matches: string:   %s\n", str, 0, 0 );
2668         Debug( LDAP_DEBUG_TRACE,
2669             "=> regex_matches: rc: %d %s\n",
2670                 rc, !rc ? "matches" : "no matches", 0 );
2671         return( !rc );
2672 }
2673