git.sur5r.net Git - openldap/blob - servers/slapd/acl.c

   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 1998-2006 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_LOCAL
  44 static const struct berval      acl_bv_path_eq = BER_BVC("PATH=");
  45 #endif /* LDAP_PF_LOCAL */
  46
  47 static AccessControl * slap_acl_get(
  48         AccessControl *ac, int *count,
  49         Operation *op, Entry *e,
  50         AttributeDescription *desc,
  51         struct berval *val,
  52         int nmatch, regmatch_t *matches,
  53         AccessControlState *state );
  54
  55 static slap_control_t slap_acl_mask(
  56         AccessControl *ac, slap_mask_t *mask,
  57         Operation *op, Entry *e,
  58         AttributeDescription *desc,
  59         struct berval *val,
  60         int nmatch,
  61         regmatch_t *matches,
  62         int count,
  63         AccessControlState *state );
  64
  65 static int      regex_matches(
  66         struct berval *pat, char *str, char *buf,
  67         int nmatch, regmatch_t *matches);
  68
  69 typedef struct AclSetCookie {
  70         SetCookie       asc_cookie;
  71 #define asc_op          asc_cookie.set_op
  72         Entry           *asc_e;
  73 } AclSetCookie;
  74
  75 SLAP_SET_GATHER acl_set_gather;
  76 SLAP_SET_GATHER acl_set_gather2;
  77
  78 /*
  79  * access_allowed - check whether op->o_ndn is allowed the requested access
  80  * to entry e, attribute attr, value val.  if val is null, access to
  81  * the whole attribute is assumed (all values).
  82  *
  83  * This routine loops through all access controls and calls
  84  * slap_acl_mask() on each applicable access control.
  85  * The loop exits when a definitive answer is reached or
  86  * or no more controls remain.
  87  *
  88  * returns:
  89  *              0       access denied
  90  *              1       access granted
  91  *
  92  * Notes:
  93  * - can be legally called with op == NULL
  94  * - can be legally called with op->o_bd == NULL
  95  */
  96
  97 #ifdef SLAP_OVERLAY_ACCESS
  98 int
  99 slap_access_always_allowed(
 100         Operation               *op,
 101         Entry                   *e,
 102         AttributeDescription    *desc,
 103         struct berval           *val,
 104         slap_access_t           access,
 105         AccessControlState      *state,
 106         slap_mask_t             *maskp )
 107 {
 108         assert( maskp != NULL );
 109
 110         /* assign all */
 111         ACL_LVL_ASSIGN_MANAGE( *maskp );
 112
 113         return 1;
 114 }
 115
 116 int
 117 slap_access_allowed(
 118         Operation               *op,
 119         Entry                   *e,
 120         AttributeDescription    *desc,
 121         struct berval           *val,
 122         slap_access_t           access,
 123         AccessControlState      *state,
 124         slap_mask_t             *maskp )
 125 {
 126         int                             ret = 1;
 127         int                             count;
 128         AccessControl                   *a = NULL;
 129
 130 #ifdef LDAP_DEBUG
 131         char                            accessmaskbuf[ACCESSMASK_MAXLEN];
 132 #endif
 133         slap_mask_t                     mask;
 134         slap_control_t                  control;
 135         slap_access_t                   access_level;
 136         const char                      *attr;
 137         regmatch_t                      matches[MAXREMATCHES];
 138         int                             st_same_attr = 0;
 139
 140         assert( op != NULL );
 141         assert( e != NULL );
 142         assert( desc != NULL );
 143         assert( maskp != NULL );
 144
 145         access_level = ACL_LEVEL( access );
 146         attr = desc->ad_cname.bv_val;
 147
 148         assert( attr != NULL );
 149
 150         ACL_INIT( mask );
 151
 152         /* grant database root access */
 153         if ( be_isroot( op ) ) {
 154                 Debug( LDAP_DEBUG_ACL, "<= root access granted\n", 0, 0, 0 );
 155                 mask = ACL_LVL_MANAGE;
 156                 goto done;
 157         }
 158
 159         /*
 160          * no-user-modification operational attributes are ignored
 161          * by ACL_WRITE checking as any found here are not provided
 162          * by the user
 163          *
 164          * NOTE: but they are not ignored for ACL_MANAGE, because
 165          * if we get here it means a non-root user is trying to
 166          * manage data, so we need to check its privileges.
 167          */
 168         if ( access_level == ACL_WRITE
 169                 && is_at_no_user_mod( desc->ad_type )
 170                 && desc != slap_schema.si_ad_entry
 171                 && desc != slap_schema.si_ad_children )
 172         {
 173                 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
 174                         " %s access granted\n",
 175                         attr, 0, 0 );
 176                 goto done;
 177         }
 178
 179         /* use backend default access if no backend acls */
 180         if ( op->o_bd->be_acl == NULL ) {
 181                 int     i;
 182
 183                 Debug( LDAP_DEBUG_ACL,
 184                         "=> slap_access_allowed: backend default %s "
 185                         "access %s to \"%s\"\n",
 186                         access2str( access ),
 187                         op->o_bd->be_dfltaccess >= access_level ? "granted" : "denied",
 188                         op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" );
 189                 ret = op->o_bd->be_dfltaccess >= access_level;
 190
 191                 mask = ACL_PRIV_LEVEL;
 192                 for ( i = ACL_NONE; i <= op->o_bd->be_dfltaccess; i++ ) {
 193                         ACL_PRIV_SET( mask, ACL_ACCESS2PRIV( i ) );
 194                 }
 195
 196                 goto done;
 197         }
 198
 199         ret = 0;
 200         control = ACL_BREAK;
 201
 202         if ( st_same_attr ) {
 203                 assert( state->as_vd_acl != NULL );
 204
 205                 a = state->as_vd_acl;
 206                 count = state->as_vd_acl_count;
 207                 if ( !ACL_IS_INVALID( state->as_vd_acl_mask ) ) {
 208                         mask = state->as_vd_acl_mask;
 209                         AC_MEMCPY( matches, state->as_vd_acl_matches, sizeof(matches) );
 210                         goto vd_access;
 211                 }
 212
 213         } else {
 214                 if ( state ) state->as_vi_acl = NULL;
 215                 a = NULL;
 216                 ACL_PRIV_ASSIGN( mask, *maskp );
 217                 count = 0;
 218                 memset( matches, '\0', sizeof( matches ) );
 219         }
 220
 221         while ( ( a = slap_acl_get( a, &count, op, e, desc, val,
 222                 MAXREMATCHES, matches, state ) ) != NULL )
 223         {
 224                 int i;
 225
 226                 for ( i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++ ) {
 227                         Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
 228                                 (int)matches[i].rm_so, (int)matches[i].rm_eo );
 229                         if ( matches[i].rm_so <= matches[0].rm_eo ) {
 230                                 int n;
 231                                 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++ ) {
 232                                         Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
 233                                 }
 234                         }
 235                         Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
 236                 }
 237
 238                 if ( state ) {
 239                         if ( state->as_vi_acl == a &&
 240                                 ( state->as_recorded & ACL_STATE_RECORDED_NV ) )
 241                         {
 242                                 Debug( LDAP_DEBUG_ACL,
 243                                         "=> slap_access_allowed: result from state (%s)\n",
 244                                         attr, 0, 0 );
 245                                 ret = state->as_result;
 246                                 goto done;
 247                         } else {
 248                                 Debug( LDAP_DEBUG_ACL,
 249                                         "=> slap_access_allowed: no res from state (%s)\n",
 250                                         attr, 0, 0 );
 251                         }
 252                 }
 253
 254 vd_access:
 255                 control = slap_acl_mask( a, &mask, op,
 256                         e, desc, val, MAXREMATCHES, matches, count, state );
 257
 258                 if ( control != ACL_BREAK ) {
 259                         break;
 260                 }
 261
 262                 memset( matches, '\0', sizeof( matches ) );
 263         }
 264
 265         if ( ACL_IS_INVALID( mask ) ) {
 266                 Debug( LDAP_DEBUG_ACL,
 267                         "=> slap_access_allowed: \"%s\" (%s) invalid!\n",
 268                         e->e_dn, attr, 0 );
 269                 ACL_PRIV_ASSIGN( mask, *maskp );
 270
 271         } else if ( control == ACL_BREAK ) {
 272                 Debug( LDAP_DEBUG_ACL,
 273                         "=> slap_access_allowed: no more rules\n", 0, 0, 0 );
 274
 275                 goto done;
 276         }
 277
 278         ret = ACL_GRANT( mask, access );
 279
 280         Debug( LDAP_DEBUG_ACL,
 281                 "=> slap_access_allowed: %s access %s by %s\n",
 282                 access2str( access ), ret ? "granted" : "denied",
 283                 accessmask2str( mask, accessmaskbuf, 1 ) );
 284
 285 done:
 286         ACL_PRIV_ASSIGN( *maskp, mask );
 287         return ret;
 288 }
 289
 290 int
 291 fe_access_allowed(
 292         Operation               *op,
 293         Entry                   *e,
 294         AttributeDescription    *desc,
 295         struct berval           *val,
 296         slap_access_t           access,
 297         AccessControlState      *state,
 298         slap_mask_t             *maskp )
 299 {
 300         BackendDB               *be_orig;
 301         int                     rc;
 302
 303         /*
 304          * NOTE: control gets here if FIXME
 305          * if an appropriate backend cannot be selected for the operation,
 306          * we assume that the frontend should handle this
 307          * FIXME: should select_backend() take care of this,
 308          * and return frontendDB instead of NULL?  maybe for some value
 309          * of the flags?
 310          */
 311         be_orig = op->o_bd;
 312
 313         if ( op->o_bd == NULL ) {
 314                 op->o_bd = select_backend( &op->o_req_ndn, 0, 0 );
 315                 if ( op->o_bd == NULL )
 316                         op->o_bd = frontendDB;
 317         }
 318         rc = slap_access_allowed( op, e, desc, val, access, state, maskp );
 319         op->o_bd = be_orig;
 320
 321         return rc;
 322 }
 323
 324 int
 325 access_allowed_mask(
 326         Operation               *op,
 327         Entry                   *e,
 328         AttributeDescription    *desc,
 329         struct berval           *val,
 330         slap_access_t           access,
 331         AccessControlState      *state,
 332         slap_mask_t             *maskp )
 333 {
 334         int                             ret = 1;
 335         AccessControl                   *a = NULL;
 336         int                             be_null = 0;
 337
 338 #ifdef LDAP_DEBUG
 339         char                            accessmaskbuf[ACCESSMASK_MAXLEN];
 340 #endif
 341         slap_mask_t                     mask;
 342         slap_access_t                   access_level;
 343         const char                      *attr;
 344         int                             st_same_attr = 0;
 345         static AccessControlState       state_init = ACL_STATE_INIT;
 346
 347         assert( e != NULL );
 348         assert( desc != NULL );
 349
 350         access_level = ACL_LEVEL( access );
 351
 352         assert( access_level > ACL_NONE );
 353
 354         ACL_INIT( mask );
 355         if ( maskp ) ACL_INVALIDATE( *maskp );
 356
 357         attr = desc->ad_cname.bv_val;
 358
 359         assert( attr != NULL );
 360
 361         if ( op ) {
 362                 if ( op->o_is_auth_check &&
 363                         ( access_level == ACL_SEARCH || access_level == ACL_READ ) )
 364                 {
 365                         access = ACL_AUTH;
 366
 367                 } else if ( get_manageDIT( op ) && access_level == ACL_WRITE &&
 368                         desc == slap_schema.si_ad_entry )
 369                 {
 370                         access = ACL_MANAGE;
 371                 }
 372         }
 373
 374         if ( state ) {
 375                 if ( state->as_vd_ad == desc ) {
 376                         if ( state->as_recorded ) {
 377                                 if ( ( state->as_recorded & ACL_STATE_RECORDED_NV ) &&
 378                                         val == NULL )
 379                                 {
 380                                         return state->as_result;
 381
 382                                 } else if ( ( state->as_recorded & ACL_STATE_RECORDED_VD ) &&
 383                                         val != NULL && state->as_vd_acl == NULL )
 384                                 {
 385                                         return state->as_result;
 386                                 }
 387                         }
 388                         st_same_attr = 1;
 389                 } else {
 390                         *state = state_init;
 391                 }
 392
 393                 state->as_vd_ad = desc;
 394         }
 395
 396         Debug( LDAP_DEBUG_ACL,
 397                 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
 398                 access2str( access ), e->e_dn, attr );
 399
 400         if ( op == NULL ) {
 401                 /* no-op call */
 402                 goto done;
 403         }
 404
 405         if ( op->o_bd == NULL ) {
 406                 op->o_bd = LDAP_STAILQ_FIRST( &backendDB );
 407                 be_null = 1;
 408
 409 #ifdef LDAP_DEVEL
 410                 /*
 411                  * FIXME: experimental; use first backend rules
 412                  * iff there is no global_acl (ITS#3100) */
 413                 if ( frontendDB->be_acl != NULL ) {
 414                         op->o_bd = frontendDB;
 415                 }
 416 #endif /* LDAP_DEVEL */
 417         }
 418         assert( op->o_bd != NULL );
 419
 420         /* this is enforced in backend_add() */
 421         if ( op->o_bd->bd_info->bi_access_allowed ) {
 422                 /* delegate to backend */
 423                 ret = op->o_bd->bd_info->bi_access_allowed( op, e,
 424                                 desc, val, access, state, &mask );
 425
 426         } else {
 427                 /* use default (but pass through frontend
 428                  * for global ACL overlays) */
 429                 ret = frontendDB->bd_info->bi_access_allowed( op, e,
 430                                 desc, val, access, state, &mask );
 431         }
 432
 433         if ( !ret ) {
 434                 if ( ACL_IS_INVALID( mask ) ) {
 435                         Debug( LDAP_DEBUG_ACL,
 436                                 "=> access_allowed: \"%s\" (%s) invalid!\n",
 437                                 e->e_dn, attr, 0 );
 438                         ACL_INIT( mask );
 439
 440                 } else {
 441                         Debug( LDAP_DEBUG_ACL,
 442                                 "=> access_allowed: no more rules\n", 0, 0, 0 );
 443
 444                         goto done;
 445                 }
 446         }
 447
 448         Debug( LDAP_DEBUG_ACL,
 449                 "=> access_allowed: %s access %s by %s\n",
 450                 access2str( access ), ret ? "granted" : "denied",
 451                 accessmask2str( mask, accessmaskbuf, 1 ) );
 452
 453 done:
 454         if ( state != NULL ) {
 455                 /* If not value-dependent, save ACL in case of more attrs */
 456                 if ( !( state->as_recorded & ACL_STATE_RECORDED_VD ) ) {
 457                         state->as_vi_acl = a;
 458                         state->as_result = ret;
 459                 }
 460                 state->as_recorded |= ACL_STATE_RECORDED;
 461         }
 462         if ( be_null ) op->o_bd = NULL;
 463         if ( maskp ) ACL_PRIV_ASSIGN( *maskp, mask );
 464         return ret;
 465 }
 466
 467 #else /* !SLAP_OVERLAY_ACCESS */
 468
 469 int
 470 access_allowed_mask(
 471         Operation               *op,
 472         Entry                   *e,
 473         AttributeDescription    *desc,
 474         struct berval           *val,
 475         slap_access_t           access,
 476         AccessControlState      *state,
 477         slap_mask_t             *maskp )
 478 {
 479         int                             ret = 1;
 480         int                             count;
 481         AccessControl                   *a = NULL;
 482         Backend                         *be;
 483         int                             be_null = 0;
 484
 485 #ifdef LDAP_DEBUG
 486         char                            accessmaskbuf[ACCESSMASK_MAXLEN];
 487 #endif
 488         slap_mask_t                     mask;
 489         slap_control_t                  control;
 490         slap_access_t                   access_level;
 491         const char                      *attr;
 492         regmatch_t                      matches[MAXREMATCHES];
 493         int                             st_same_attr = 0;
 494         static AccessControlState       state_init = ACL_STATE_INIT;
 495
 496         assert( e != NULL );
 497         assert( desc != NULL );
 498
 499         access_level = ACL_LEVEL( access );
 500
 501         assert( access_level > ACL_NONE );
 502         if ( maskp ) ACL_INVALIDATE( *maskp );
 503
 504         attr = desc->ad_cname.bv_val;
 505
 506         assert( attr != NULL );
 507
 508         if ( op ) {
 509                 if ( op->o_is_auth_check &&
 510                         ( access_level == ACL_SEARCH || access_level == ACL_READ ) )
 511                 {
 512                         access = ACL_AUTH;
 513
 514                 } else if ( get_manageDIT( op ) && access_level == ACL_WRITE &&
 515                         desc == slap_schema.si_ad_entry )
 516                 {
 517                         access = ACL_MANAGE;
 518                 }
 519         }
 520
 521         if ( state ) {
 522                 if ( state->as_vd_ad == desc ) {
 523                         if ( state->as_recorded ) {
 524                                 if ( ( state->as_recorded & ACL_STATE_RECORDED_NV ) &&
 525                                         val == NULL )
 526                                 {
 527                                         return state->as_result;
 528
 529                                 } else if ( ( state->as_recorded & ACL_STATE_RECORDED_VD ) &&
 530                                         val != NULL && state->as_vd_acl == NULL )
 531                                 {
 532                                         return state->as_result;
 533                                 }
 534                         }
 535                         st_same_attr = 1;
 536                 } else {
 537                         *state = state_init;
 538                 }
 539
 540                 state->as_vd_ad=desc;
 541         }
 542
 543         Debug( LDAP_DEBUG_ACL,
 544                 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
 545                 access2str( access ), e->e_dn, attr );
 546
 547         if ( op == NULL ) {
 548                 /* no-op call */
 549                 goto done;
 550         }
 551
 552         be = op->o_bd;
 553         if ( be == NULL ) {
 554                 be = LDAP_STAILQ_FIRST(&backendDB);
 555                 be_null = 1;
 556 #ifdef LDAP_DEVEL
 557                 /*
 558                  * FIXME: experimental; use first backend rules
 559                  * iff there is no global_acl (ITS#3100) */
 560                 if ( frontendDB->be_acl == NULL )
 561 #endif
 562                 {
 563                         op->o_bd = be;
 564                 }
 565         }
 566         assert( be != NULL );
 567
 568         /* grant database root access */
 569         if ( be_isroot( op ) ) {
 570                 Debug( LDAP_DEBUG_ACL, "<= root access granted\n", 0, 0, 0 );
 571                 if ( maskp ) {
 572                         mask = ACL_LVL_MANAGE;
 573                 }
 574
 575                 goto done;
 576         }
 577
 578         /*
 579          * no-user-modification operational attributes are ignored
 580          * by ACL_WRITE checking as any found here are not provided
 581          * by the user
 582          *
 583          * NOTE: but they are not ignored for ACL_MANAGE, because
 584          * if we get here it means a non-root user is trying to
 585          * manage data, so we need to check its privileges.
 586          */
 587         if ( access_level == ACL_WRITE && is_at_no_user_mod( desc->ad_type )
 588                 && desc != slap_schema.si_ad_entry
 589                 && desc != slap_schema.si_ad_children )
 590         {
 591                 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
 592                         " %s access granted\n",
 593                         attr, 0, 0 );
 594                 goto done;
 595         }
 596
 597         /* use backend default access if no backend acls */
 598         if ( be->be_acl == NULL ) {
 599                 Debug( LDAP_DEBUG_ACL,
 600                         "=> access_allowed: backend default %s "
 601                         "access %s to \"%s\"\n",
 602                         access2str( access ),
 603                         be->be_dfltaccess >= access_level ? "granted" : "denied",
 604                         op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" );
 605                 ret = be->be_dfltaccess >= access_level;
 606
 607                 if ( maskp ) {
 608                         int     i;
 609
 610                         mask = ACL_PRIV_LEVEL;
 611                         for ( i = ACL_NONE; i <= be->be_dfltaccess; i++ ) {
 612                                 mask |= ACL_ACCESS2PRIV( i );
 613                         }
 614                 }
 615
 616                 goto done;
 617
 618 #ifdef notdef
 619         /* be is always non-NULL */
 620         /* use global default access if no global acls */
 621         } else if ( be == NULL && frontendDB->be_acl == NULL ) {
 622                 Debug( LDAP_DEBUG_ACL,
 623                         "=> access_allowed: global default %s access %s to \"%s\"\n",
 624                         access2str( access ),
 625                         frontendDB->be_dfltaccess >= access_level ?
 626                                 "granted" : "denied", op->o_dn.bv_val );
 627                 ret = frontendDB->be_dfltaccess >= access_level;
 628
 629                 if ( maskp ) {
 630                         int     i;
 631
 632                         mask = ACL_PRIV_LEVEL;
 633                         for ( i = ACL_NONE; i <= global_default_access; i++ ) {
 634                                 mask |= ACL_ACCESS2PRIV( i );
 635                         }
 636                 }
 637
 638                 goto done;
 639 #endif
 640         }
 641
 642         ret = 0;
 643         control = ACL_BREAK;
 644
 645         if ( st_same_attr ) {
 646                 assert( state->as_vd_acl != NULL );
 647
 648                 a = state->as_vd_acl;
 649                 count = state->as_vd_acl_count;
 650                 if ( !ACL_IS_INVALID( state->as_vd_acl_mask ) ) {
 651                         mask = state->as_vd_acl_mask;
 652                         AC_MEMCPY( matches, state->as_vd_acl_matches, sizeof(matches) );
 653                         goto vd_access;
 654                 }
 655
 656         } else {
 657                 if ( state ) state->as_vi_acl = NULL;
 658                 a = NULL;
 659                 ACL_INIT(mask);
 660                 count = 0;
 661                 memset( matches, '\0', sizeof(matches) );
 662         }
 663
 664         while ( ( a = slap_acl_get( a, &count, op, e, desc, val,
 665                 MAXREMATCHES, matches, state ) ) != NULL )
 666         {
 667                 int i;
 668
 669                 for ( i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++ ) {
 670                         Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
 671                                 (int)matches[i].rm_so, (int)matches[i].rm_eo );
 672                         if ( matches[i].rm_so <= matches[0].rm_eo ) {
 673                                 int n;
 674                                 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++ ) {
 675                                         Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
 676                                 }
 677                         }
 678                         Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
 679                 }
 680
 681                 if ( state ) {
 682                         if ( state->as_vi_acl == a &&
 683                                 ( state->as_recorded & ACL_STATE_RECORDED_NV ) )
 684                         {
 685                                 Debug( LDAP_DEBUG_ACL,
 686                                         "access_allowed: result from state (%s)\n",
 687                                         attr, 0, 0 );
 688                                 ret = state->as_result;
 689                                 goto done;
 690                         } else {
 691                                 Debug( LDAP_DEBUG_ACL,
 692                                         "access_allowed: no res from state (%s)\n",
 693                                         attr, 0, 0 );
 694                         }
 695                 }
 696
 697 vd_access:
 698                 control = slap_acl_mask( a, &mask, op,
 699                         e, desc, val, MAXREMATCHES, matches, count, state );
 700
 701                 if ( control != ACL_BREAK ) {
 702                         break;
 703                 }
 704
 705                 memset( matches, '\0', sizeof(matches) );
 706         }
 707
 708         if ( ACL_IS_INVALID( mask ) ) {
 709                 Debug( LDAP_DEBUG_ACL,
 710                         "=> access_allowed: \"%s\" (%s) invalid!\n",
 711                         e->e_dn, attr, 0 );
 712                 ACL_INIT(mask);
 713
 714         } else if ( control == ACL_BREAK ) {
 715                 Debug( LDAP_DEBUG_ACL,
 716                         "=> access_allowed: no more rules\n", 0, 0, 0 );
 717
 718                 goto done;
 719         }
 720
 721         Debug( LDAP_DEBUG_ACL,
 722                 "=> access_allowed: %s access %s by %s\n",
 723                 access2str( access ),
 724                 ACL_GRANT(mask, access) ? "granted" : "denied",
 725                 accessmask2str( mask, accessmaskbuf, 1 ) );
 726
 727         ret = ACL_GRANT(mask, access);
 728
 729 done:
 730         if ( state != NULL ) {
 731                 /* If not value-dependent, save ACL in case of more attrs */
 732                 if ( !( state->as_recorded & ACL_STATE_RECORDED_VD ) ) {
 733                         state->as_vi_acl = a;
 734                         state->as_result = ret;
 735                 }
 736                 state->as_recorded |= ACL_STATE_RECORDED;
 737         }
 738         if ( be_null ) op->o_bd = NULL;
 739         if ( maskp ) *maskp = mask;
 740         return ret;
 741 }
 742
 743 #endif /* SLAP_OVERLAY_ACCESS */
 744
 745 /*
 746  * slap_acl_get - return the acl applicable to entry e, attribute
 747  * attr.  the acl returned is suitable for use in subsequent calls to
 748  * acl_access_allowed().
 749  */
 750
 751 static AccessControl *
 752 slap_acl_get(
 753         AccessControl *a,
 754         int                     *count,
 755         Operation       *op,
 756         Entry           *e,
 757         AttributeDescription *desc,
 758         struct berval   *val,
 759         int                     nmatch,
 760         regmatch_t      *matches,
 761         AccessControlState *state )
 762 {
 763         const char *attr;
 764         int dnlen, patlen;
 765         AccessControl *prev;
 766
 767         assert( e != NULL );
 768         assert( count != NULL );
 769         assert( desc != NULL );
 770
 771         attr = desc->ad_cname.bv_val;
 772
 773         assert( attr != NULL );
 774
 775         if( a == NULL ) {
 776                 if( op->o_bd == NULL ) {
 777                         a = frontendDB->be_acl;
 778                 } else {
 779                         a = op->o_bd->be_acl;
 780                 }
 781                 prev = NULL;
 782
 783                 assert( a != NULL );
 784
 785         } else {
 786                 prev = a;
 787                 a = a->acl_next;
 788         }
 789
 790         dnlen = e->e_nname.bv_len;
 791
 792         for ( ; a != NULL; a = a->acl_next ) {
 793                 (*count) ++;
 794
 795                 if ( a->acl_dn_pat.bv_len || ( a->acl_dn_style != ACL_STYLE_REGEX )) {
 796                         if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
 797                                 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
 798                                         *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub );
 799                                 if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
 800                                         continue;
 801
 802                         } else {
 803                                 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
 804                                         *count, a->acl_dn_pat.bv_val, 0 );
 805                                 patlen = a->acl_dn_pat.bv_len;
 806                                 if ( dnlen < patlen )
 807                                         continue;
 808
 809                                 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
 810                                         /* base dn -- entire object DN must match */
 811                                         if ( dnlen != patlen )
 812                                                 continue;
 813
 814                                 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
 815                                         ber_len_t       rdnlen = 0;
 816                                         int             sep = 0;
 817
 818                                         if ( dnlen <= patlen )
 819                                                 continue;
 820
 821                                         if ( patlen > 0 ) {
 822                                                 if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 823                                                         continue;
 824                                                 sep = 1;
 825                                         }
 826
 827                                         rdnlen = dn_rdnlen( NULL, &e->e_nname );
 828                                         if ( rdnlen != dnlen - patlen - sep )
 829                                                 continue;
 830
 831                                 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
 832                                         if ( dnlen > patlen && !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 833                                                 continue;
 834
 835                                 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
 836                                         if ( dnlen <= patlen )
 837                                                 continue;
 838                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 839                                                 continue;
 840                                 }
 841
 842                                 if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
 843                                         continue;
 844                         }
 845
 846                         Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
 847                                 *count, 0, 0 );
 848                 }
 849
 850                 if ( a->acl_attrs && !ad_inlist( desc, a->acl_attrs ) ) {
 851                         matches[0].rm_so = matches[0].rm_eo = -1;
 852                         continue;
 853                 }
 854
 855                 /* Is this ACL only for a specific value? */
 856                 if ( a->acl_attrval.bv_len ) {
 857                         if ( val == NULL ) {
 858                                 continue;
 859                         }
 860
 861                         if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) {
 862                                 state->as_recorded |= ACL_STATE_RECORDED_VD;
 863                                 state->as_vd_acl = a;
 864                                 state->as_vd_acl_count = *count;
 865                                 state->as_vd_access = a->acl_access;
 866                                 state->as_vd_access_count = 1;
 867                                 ACL_INVALIDATE( state->as_vd_acl_mask );
 868                         }
 869
 870                         if ( a->acl_attrval_style == ACL_STYLE_REGEX ) {
 871                                 Debug( LDAP_DEBUG_ACL,
 872                                         "acl_get: valpat %s\n",
 873                                         a->acl_attrval.bv_val, 0, 0 );
 874                                 if ( regexec( &a->acl_attrval_re, val->bv_val, 0, NULL, 0 ) )
 875                                 {
 876                                         continue;
 877                                 }
 878
 879                         } else {
 880                                 int match = 0;
 881                                 const char *text;
 882                                 Debug( LDAP_DEBUG_ACL,
 883                                         "acl_get: val %s\n",
 884                                         a->acl_attrval.bv_val, 0, 0 );
 885
 886                                 if ( a->acl_attrs[0].an_desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName ) {
 887                                         if (value_match( &match, desc,
 888                                                 a->acl_attrval_mr, 0,
 889                                                 val, &a->acl_attrval, &text ) != LDAP_SUCCESS ||
 890                                                         match )
 891                                                 continue;
 892
 893                                 } else {
 894                                         int             patlen, vdnlen;
 895
 896                                         patlen = a->acl_attrval.bv_len;
 897                                         vdnlen = val->bv_len;
 898
 899                                         if ( vdnlen < patlen )
 900                                                 continue;
 901
 902                                         if ( a->acl_attrval_style == ACL_STYLE_BASE ) {
 903                                                 if ( vdnlen > patlen )
 904                                                         continue;
 905
 906                                         } else if ( a->acl_attrval_style == ACL_STYLE_ONE ) {
 907                                                 ber_len_t       rdnlen = 0;
 908
 909                                                 if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
 910                                                         continue;
 911
 912                                                 rdnlen = dn_rdnlen( NULL, val );
 913                                                 if ( rdnlen != vdnlen - patlen - 1 )
 914                                                         continue;
 915
 916                                         } else if ( a->acl_attrval_style == ACL_STYLE_SUBTREE ) {
 917                                                 if ( vdnlen > patlen && !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
 918                                                         continue;
 919
 920                                         } else if ( a->acl_attrval_style == ACL_STYLE_CHILDREN ) {
 921                                                 if ( vdnlen <= patlen )
 922                                                         continue;
 923
 924                                                 if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
 925                                                         continue;
 926                                         }
 927
 928                                         if ( strcmp( a->acl_attrval.bv_val, val->bv_val + vdnlen - patlen ) )
 929                                                 continue;
 930                                 }
 931                         }
 932                 }
 933
 934                 if ( a->acl_filter != NULL ) {
 935                         ber_int_t rc = test_filter( NULL, e, a->acl_filter );
 936                         if ( rc != LDAP_COMPARE_TRUE ) {
 937                                 continue;
 938                         }
 939                 }
 940
 941                 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] attr %s\n",
 942                        *count, attr, 0);
 943                 return a;
 944         }
 945
 946         Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
 947         return( NULL );
 948 }
 949
 950 static int
 951 acl_mask_dn(
 952         Operation               *op,
 953         Entry                   *e,
 954         AttributeDescription    *desc,
 955         struct berval           *val,
 956         AccessControl           *a,
 957         int                     nmatch,
 958         regmatch_t              *matches,
 959         slap_dn_access          *b,
 960         struct berval           *opndn )
 961 {
 962         /*
 963          * if access applies to the entry itself, and the
 964          * user is bound as somebody in the same namespace as
 965          * the entry, OR the given dn matches the dn pattern
 966          */
 967         /*
 968          * NOTE: styles "anonymous", "users" and "self"
 969          * have been moved to enum slap_style_t, whose
 970          * value is set in a_dn_style; however, the string
 971          * is maintaned in a_dn_pat.
 972          */
 973         if ( b->a_style == ACL_STYLE_ANONYMOUS ) {
 974                 if ( !BER_BVISEMPTY( opndn ) ) {
 975                         return 1;
 976                 }
 977
 978         } else if ( b->a_style == ACL_STYLE_USERS ) {
 979                 if ( BER_BVISEMPTY( opndn ) ) {
 980                         return 1;
 981                 }
 982
 983                 if ( b->a_self ) {
 984                         const char *dummy;
 985                         int rc, match = 0;
 986
 987                         /* must have DN syntax */
 988                         if ( desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName ) return 1;
 989
 990                         /* check if the target is an attribute. */
 991                         if ( val == NULL ) return 1;
 992
 993                         /* target is attribute, check if the attribute value
 994                          * is the op dn.
 995                          */
 996                         rc = value_match( &match, desc,
 997                                 desc->ad_type->sat_equality, 0,
 998                                 val, opndn, &dummy );
 999                         /* on match error or no match, fail the ACL clause */
1000                         if ( rc != LDAP_SUCCESS || match != 0 )
1001                                 return 1;
1002                 }
1003
1004         } else if ( b->a_style == ACL_STYLE_SELF ) {
1005                 struct berval   ndn, selfndn;
1006                 int             level;
1007
1008                 if ( BER_BVISEMPTY( opndn ) || BER_BVISNULL( &e->e_nname ) ) {
1009                         return 1;
1010                 }
1011
1012                 level = b->a_self_level;
1013                 if ( level < 0 ) {
1014                         selfndn = *opndn;
1015                         ndn = e->e_nname;
1016                         level = -level;
1017
1018                 } else {
1019                         ndn = *opndn;
1020                         selfndn = e->e_nname;
1021                 }
1022
1023                 for ( ; level > 0; level-- ) {
1024                         if ( BER_BVISEMPTY( &ndn ) ) {
1025                                 break;
1026                         }
1027                         dnParent( &ndn, &ndn );
1028                 }
1029
1030                 if ( BER_BVISEMPTY( &ndn ) || !dn_match( &ndn, &selfndn ) )
1031                 {
1032                         return 1;
1033                 }
1034
1035         } else if ( b->a_style == ACL_STYLE_REGEX ) {
1036                 if ( !ber_bvccmp( &b->a_pat, '*' ) ) {
1037                         int             tmp_nmatch;
1038                         regmatch_t      tmp_matches[2],
1039                                         *tmp_matchesp = tmp_matches;
1040
1041                         int             rc = 0;
1042
1043                         switch ( a->acl_dn_style ) {
1044                         case ACL_STYLE_REGEX:
1045                                 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1046                                         tmp_matchesp = matches;
1047                                         tmp_nmatch = nmatch;
1048                                         break;
1049                                 }
1050                         /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1051
1052                         case ACL_STYLE_BASE:
1053                                 tmp_matches[0].rm_so = 0;
1054                                 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1055                                 tmp_nmatch = 1;
1056                                 break;
1057
1058                         case ACL_STYLE_ONE:
1059                         case ACL_STYLE_SUBTREE:
1060                         case ACL_STYLE_CHILDREN:
1061                                 tmp_matches[0].rm_so = 0;
1062                                 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1063                                 tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1064                                 tmp_matches[1].rm_eo = e->e_nname.bv_len;
1065                                 tmp_nmatch = 2;
1066                                 break;
1067
1068                         default:
1069                                 /* error */
1070                                 rc = 1;
1071                                 break;
1072                         }
1073
1074                         if ( rc ) {
1075                                 return 1;
1076                         }
1077
1078                         if ( !regex_matches( &b->a_pat, opndn->bv_val,
1079                                 e->e_ndn, tmp_nmatch, tmp_matchesp ) )
1080                         {
1081                                 return 1;
1082                         }
1083                 }
1084
1085         } else {
1086                 struct berval   pat;
1087                 ber_len_t       patlen, odnlen;
1088                 int             got_match = 0;
1089
1090                 if ( e->e_dn == NULL )
1091                         return 1;
1092
1093                 if ( b->a_expand ) {
1094                         struct berval   bv;
1095                         char            buf[ACL_BUF_SIZE];
1096
1097                         int             tmp_nmatch;
1098                         regmatch_t      tmp_matches[2],
1099                                         *tmp_matchesp = tmp_matches;
1100
1101                         int             rc = 0;
1102
1103                         bv.bv_len = sizeof( buf ) - 1;
1104                         bv.bv_val = buf;
1105
1106                         switch ( a->acl_dn_style ) {
1107                         case ACL_STYLE_REGEX:
1108                                 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1109                                         tmp_matchesp = matches;
1110                                         tmp_nmatch = nmatch;
1111                                         break;
1112                                 }
1113                         /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1114
1115                         case ACL_STYLE_BASE:
1116                                 tmp_matches[0].rm_so = 0;
1117                                 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1118                                 tmp_nmatch = 1;
1119                                 break;
1120
1121                         case ACL_STYLE_ONE:
1122                         case ACL_STYLE_SUBTREE:
1123                         case ACL_STYLE_CHILDREN:
1124                                 tmp_matches[0].rm_so = 0;
1125                                 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1126                                 tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1127                                 tmp_matches[1].rm_eo = e->e_nname.bv_len;
1128                                 tmp_nmatch = 2;
1129                                 break;
1130
1131                         default:
1132                                 /* error */
1133                                 rc = 1;
1134                                 break;
1135                         }
1136
1137                         if ( rc ) {
1138                                 return 1;
1139                         }
1140
1141                         if ( acl_string_expand( &bv, &b->a_pat,
1142                                         e->e_nname.bv_val,
1143                                         tmp_nmatch, tmp_matchesp ) )
1144                         {
1145                                 return 1;
1146                         }
1147
1148                         if ( dnNormalize(0, NULL, NULL, &bv,
1149                                         &pat, op->o_tmpmemctx )
1150                                         != LDAP_SUCCESS )
1151                         {
1152                                 /* did not expand to a valid dn */
1153                                 return 1;
1154                         }
1155
1156                 } else {
1157                         pat = b->a_pat;
1158                 }
1159
1160                 patlen = pat.bv_len;
1161                 odnlen = opndn->bv_len;
1162                 if ( odnlen < patlen ) {
1163                         goto dn_match_cleanup;
1164
1165                 }
1166
1167                 if ( b->a_style == ACL_STYLE_BASE ) {
1168                         /* base dn -- entire object DN must match */
1169                         if ( odnlen != patlen ) {
1170                                 goto dn_match_cleanup;
1171                         }
1172
1173                 } else if ( b->a_style == ACL_STYLE_ONE ) {
1174                         ber_len_t       rdnlen = 0;
1175
1176                         if ( odnlen <= patlen ) {
1177                                 goto dn_match_cleanup;
1178                         }
1179
1180                         if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
1181                                 goto dn_match_cleanup;
1182                         }
1183
1184                         rdnlen = dn_rdnlen( NULL, opndn );
1185                         if ( rdnlen - ( odnlen - patlen - 1 ) != 0 ) {
1186                                 goto dn_match_cleanup;
1187                         }
1188
1189                 } else if ( b->a_style == ACL_STYLE_SUBTREE ) {
1190                         if ( odnlen > patlen && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
1191                                 goto dn_match_cleanup;
1192                         }
1193
1194                 } else if ( b->a_style == ACL_STYLE_CHILDREN ) {
1195                         if ( odnlen <= patlen ) {
1196                                 goto dn_match_cleanup;
1197                         }
1198
1199                         if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
1200                                 goto dn_match_cleanup;
1201                         }
1202
1203                 } else if ( b->a_style == ACL_STYLE_LEVEL ) {
1204                         int             level = b->a_level;
1205                         struct berval   ndn;
1206
1207                         if ( odnlen <= patlen ) {
1208                                 goto dn_match_cleanup;
1209                         }
1210
1211                         if ( level > 0 && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) )
1212                         {
1213                                 goto dn_match_cleanup;
1214                         }
1215
1216                         ndn = *opndn;
1217                         for ( ; level > 0; level-- ) {
1218                                 if ( BER_BVISEMPTY( &ndn ) ) {
1219                                         goto dn_match_cleanup;
1220                                 }
1221                                 dnParent( &ndn, &ndn );
1222                                 if ( ndn.bv_len < patlen ) {
1223                                         goto dn_match_cleanup;
1224                                 }
1225                         }
1226
1227                         if ( ndn.bv_len != patlen ) {
1228                                 goto dn_match_cleanup;
1229                         }
1230                 }
1231
1232                 got_match = !strcmp( pat.bv_val, &opndn->bv_val[ odnlen - patlen ] );
1233
1234 dn_match_cleanup:;
1235                 if ( pat.bv_val != b->a_pat.bv_val ) {
1236                         slap_sl_free( pat.bv_val, op->o_tmpmemctx );
1237                 }
1238
1239                 if ( !got_match ) {
1240                         return 1;
1241                 }
1242         }
1243
1244         return 0;
1245 }
1246
1247 /*
1248  * Record value-dependent access control state
1249  */
1250 #define ACL_RECORD_VALUE_STATE do { \
1251                 if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) { \
1252                         state->as_recorded |= ACL_STATE_RECORDED_VD; \
1253                         state->as_vd_acl = a; \
1254                         AC_MEMCPY( state->as_vd_acl_matches, matches, \
1255                                 sizeof( state->as_vd_acl_matches )) ; \
1256                         state->as_vd_acl_count = count; \
1257                         state->as_vd_access = b; \
1258                         state->as_vd_access_count = i; \
1259                 } \
1260         } while( 0 )
1261
1262 static int
1263 acl_mask_dnattr(
1264         Operation               *op,
1265         Entry                   *e,
1266         struct berval           *val,
1267         AccessControl           *a,
1268         Access                  *b,
1269         int                     i,
1270         regmatch_t              *matches,
1271         int                     count,
1272         AccessControlState      *state,
1273         slap_dn_access          *bdn,
1274         struct berval           *opndn )
1275 {
1276         Attribute       *at;
1277         struct berval   bv;
1278         int             rc, match = 0;
1279         const char      *text;
1280         const char      *attr = bdn->a_at->ad_cname.bv_val;
1281
1282         assert( attr != NULL );
1283
1284         if ( BER_BVISEMPTY( opndn ) ) {
1285                 return 1;
1286         }
1287
1288         Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n", attr, 0, 0 );
1289         bv = *opndn;
1290
1291         /* see if asker is listed in dnattr */
1292         for ( at = attrs_find( e->e_attrs, bdn->a_at );
1293                 at != NULL;
1294                 at = attrs_find( at->a_next, bdn->a_at ) )
1295         {
1296                 if ( value_find_ex( bdn->a_at,
1297                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1298                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1299                         at->a_nvals,
1300                         &bv, op->o_tmpmemctx ) == 0 )
1301                 {
1302                         /* found it */
1303                         match = 1;
1304                         break;
1305                 }
1306         }
1307
1308         if ( match ) {
1309                 /* have a dnattr match. if this is a self clause then
1310                  * the target must also match the op dn.
1311                  */
1312                 if ( bdn->a_self ) {
1313                         /* check if the target is an attribute. */
1314                         if ( val == NULL ) return 1;
1315
1316                         /* target is attribute, check if the attribute value
1317                          * is the op dn.
1318                          */
1319                         rc = value_match( &match, bdn->a_at,
1320                                 bdn->a_at->ad_type->sat_equality, 0,
1321                                 val, &bv, &text );
1322                         /* on match error or no match, fail the ACL clause */
1323                         if ( rc != LDAP_SUCCESS || match != 0 )
1324                                 return 1;
1325                 }
1326
1327         } else {
1328                 /* no dnattr match, check if this is a self clause */
1329                 if ( ! bdn->a_self )
1330                         return 1;
1331
1332                 ACL_RECORD_VALUE_STATE;
1333
1334                 /* this is a self clause, check if the target is an
1335                  * attribute.
1336                  */
1337                 if ( val == NULL )
1338                         return 1;
1339
1340                 /* target is attribute, check if the attribute value
1341                  * is the op dn.
1342                  */
1343                 rc = value_match( &match, bdn->a_at,
1344                         bdn->a_at->ad_type->sat_equality, 0,
1345                         val, &bv, &text );
1346
1347                 /* on match error or no match, fail the ACL clause */
1348                 if ( rc != LDAP_SUCCESS || match != 0 )
1349                         return 1;
1350         }
1351
1352         return 0;
1353 }
1354
1355
1356 /*
1357  * slap_acl_mask - modifies mask based upon the given acl and the
1358  * requested access to entry e, attribute attr, value val.  if val
1359  * is null, access to the whole attribute is assumed (all values).
1360  *
1361  * returns      0       access NOT allowed
1362  *              1       access allowed
1363  */
1364
1365 static slap_control_t
1366 slap_acl_mask(
1367         AccessControl           *a,
1368         slap_mask_t             *mask,
1369         Operation               *op,
1370         Entry                   *e,
1371         AttributeDescription    *desc,
1372         struct berval           *val,
1373         int                     nmatch,
1374         regmatch_t              *matches,
1375         int                     count,
1376         AccessControlState      *state )
1377 {
1378         int             i;
1379         Access          *b;
1380 #ifdef LDAP_DEBUG
1381         char            accessmaskbuf[ACCESSMASK_MAXLEN];
1382 #endif /* DEBUG */
1383         const char      *attr;
1384         slap_mask_t     a2pmask = ACL_ACCESS2PRIV( *mask );
1385
1386         assert( a != NULL );
1387         assert( mask != NULL );
1388         assert( desc != NULL );
1389
1390         attr = desc->ad_cname.bv_val;
1391
1392         assert( attr != NULL );
1393
1394         Debug( LDAP_DEBUG_ACL,
1395                 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
1396                 e->e_dn, attr, 0 );
1397
1398         Debug( LDAP_DEBUG_ACL,
1399                 "=> acl_mask: to %s by \"%s\", (%s) \n",
1400                 val ? "value" : "all values",
1401                 op->o_ndn.bv_val ?  op->o_ndn.bv_val : "",
1402                 accessmask2str( *mask, accessmaskbuf, 1 ) );
1403
1404
1405         if( state && ( state->as_recorded & ACL_STATE_RECORDED_VD )
1406                 && state->as_vd_acl == a )
1407         {
1408                 b = state->as_vd_access;
1409                 i = state->as_vd_access_count;
1410
1411         } else {
1412                 b = a->acl_access;
1413                 i = 1;
1414         }
1415
1416         for ( ; b != NULL; b = b->a_next, i++ ) {
1417                 slap_mask_t oldmask, modmask;
1418
1419                 ACL_INVALIDATE( modmask );
1420
1421                 /* AND <who> clauses */
1422                 if ( !BER_BVISEMPTY( &b->a_dn_pat ) ) {
1423                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
1424                                 b->a_dn_pat.bv_val, 0, 0);
1425                         /*
1426                          * if access applies to the entry itself, and the
1427                          * user is bound as somebody in the same namespace as
1428                          * the entry, OR the given dn matches the dn pattern
1429                          */
1430                         /*
1431                          * NOTE: styles "anonymous", "users" and "self"
1432                          * have been moved to enum slap_style_t, whose
1433                          * value is set in a_dn_style; however, the string
1434                          * is maintaned in a_dn_pat.
1435                          */
1436
1437                         if ( acl_mask_dn( op, e, desc, val, a, nmatch, matches,
1438                                 &b->a_dn, &op->o_ndn ) )
1439                         {
1440                                 continue;
1441                         }
1442                 }
1443
1444                 if ( !BER_BVISEMPTY( &b->a_realdn_pat ) ) {
1445                         struct berval   ndn;
1446
1447                         Debug( LDAP_DEBUG_ACL, "<= check a_realdn_pat: %s\n",
1448                                 b->a_realdn_pat.bv_val, 0, 0);
1449                         /*
1450                          * if access applies to the entry itself, and the
1451                          * user is bound as somebody in the same namespace as
1452                          * the entry, OR the given dn matches the dn pattern
1453                          */
1454                         /*
1455                          * NOTE: styles "anonymous", "users" and "self"
1456                          * have been moved to enum slap_style_t, whose
1457                          * value is set in a_dn_style; however, the string
1458                          * is maintaned in a_dn_pat.
1459                          */
1460
1461                         if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) )
1462                         {
1463                                 ndn = op->o_conn->c_ndn;
1464                         } else {
1465                                 ndn = op->o_ndn;
1466                         }
1467
1468                         if ( acl_mask_dn( op, e, desc, val, a, nmatch, matches,
1469                                 &b->a_realdn, &ndn ) )
1470                         {
1471                                 continue;
1472                         }
1473                 }
1474
1475                 if ( !BER_BVISEMPTY( &b->a_sockurl_pat ) ) {
1476                         if ( ! op->o_conn->c_listener ) {
1477                                 continue;
1478                         }
1479                         Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
1480                                 b->a_sockurl_pat.bv_val, 0, 0 );
1481
1482                         if ( !ber_bvccmp( &b->a_sockurl_pat, '*' ) ) {
1483                                 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
1484                                         if (!regex_matches( &b->a_sockurl_pat, op->o_conn->c_listener_url.bv_val,
1485                                                         e->e_ndn, nmatch, matches ) )
1486                                         {
1487                                                 continue;
1488                                         }
1489
1490                                 } else if ( b->a_sockurl_style == ACL_STYLE_EXPAND ) {
1491                                         struct berval   bv;
1492                                         char buf[ACL_BUF_SIZE];
1493
1494                                         bv.bv_len = sizeof( buf ) - 1;
1495                                         bv.bv_val = buf;
1496                                         if ( acl_string_expand( &bv, &b->a_sockurl_pat,
1497                                                         e->e_ndn, nmatch, matches ) )
1498                                         {
1499                                                 continue;
1500                                         }
1501
1502                                         if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_listener_url ) != 0 )
1503                                         {
1504                                                 continue;
1505                                         }
1506
1507                                 } else {
1508                                         if ( ber_bvstrcasecmp( &b->a_sockurl_pat, &op->o_conn->c_listener_url ) != 0 )
1509                                         {
1510                                                 continue;
1511                                         }
1512                                 }
1513                         }
1514                 }
1515
1516                 if ( !BER_BVISEMPTY( &b->a_domain_pat ) ) {
1517                         if ( !op->o_conn->c_peer_domain.bv_val ) {
1518                                 continue;
1519                         }
1520                         Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
1521                                 b->a_domain_pat.bv_val, 0, 0 );
1522                         if ( !ber_bvccmp( &b->a_domain_pat, '*' ) ) {
1523                                 if ( b->a_domain_style == ACL_STYLE_REGEX) {
1524                                         if (!regex_matches( &b->a_domain_pat, op->o_conn->c_peer_domain.bv_val,
1525                                                         e->e_ndn, nmatch, matches ) )
1526                                         {
1527                                                 continue;
1528                                         }
1529                                 } else {
1530                                         char buf[ACL_BUF_SIZE];
1531
1532                                         struct berval   cmp = op->o_conn->c_peer_domain;
1533                                         struct berval   pat = b->a_domain_pat;
1534
1535                                         if ( b->a_domain_expand ) {
1536                                                 struct berval bv;
1537
1538                                                 bv.bv_len = sizeof(buf) - 1;
1539                                                 bv.bv_val = buf;
1540
1541                                                 if ( acl_string_expand(&bv, &b->a_domain_pat,
1542                                                                 e->e_ndn, nmatch, matches) )
1543                                                 {
1544                                                         continue;
1545                                                 }
1546                                                 pat = bv;
1547                                         }
1548
1549                                         if ( b->a_domain_style == ACL_STYLE_SUBTREE ) {
1550                                                 int offset = cmp.bv_len - pat.bv_len;
1551                                                 if ( offset < 0 ) {
1552                                                         continue;
1553                                                 }
1554
1555                                                 if ( offset == 1 || ( offset > 1 && cmp.bv_val[ offset - 1 ] != '.' ) ) {
1556                                                         continue;
1557                                                 }
1558
1559                                                 /* trim the domain */
1560                                                 cmp.bv_val = &cmp.bv_val[ offset ];
1561                                                 cmp.bv_len -= offset;
1562                                         }
1563
1564                                         if ( ber_bvstrcasecmp( &pat, &cmp ) != 0 ) {
1565                                                 continue;
1566                                         }
1567                                 }
1568                         }
1569                 }
1570
1571                 if ( !BER_BVISEMPTY( &b->a_peername_pat ) ) {
1572                         if ( !op->o_conn->c_peer_name.bv_val ) {
1573                                 continue;
1574                         }
1575                         Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
1576                                 b->a_peername_pat.bv_val, 0, 0 );
1577                         if ( !ber_bvccmp( &b->a_peername_pat, '*' ) ) {
1578                                 if ( b->a_peername_style == ACL_STYLE_REGEX ) {
1579                                         if (!regex_matches( &b->a_peername_pat, op->o_conn->c_peer_name.bv_val,
1580                                                         e->e_ndn, nmatch, matches ) )
1581                                         {
1582                                                 continue;
1583                                         }
1584
1585                                 } else {
1586                                         /* try exact match */
1587                                         if ( b->a_peername_style == ACL_STYLE_BASE ) {
1588                                                 if ( ber_bvstrcasecmp( &b->a_peername_pat, &op->o_conn->c_peer_name ) != 0 ) {
1589                                                         continue;
1590                                                 }
1591
1592                                         } else if ( b->a_peername_style == ACL_STYLE_EXPAND ) {
1593                                                 struct berval   bv;
1594                                                 char buf[ACL_BUF_SIZE];
1595
1596                                                 bv.bv_len = sizeof( buf ) - 1;
1597                                                 bv.bv_val = buf;
1598                                                 if ( acl_string_expand( &bv, &b->a_peername_pat,
1599                                                                 e->e_ndn, nmatch, matches ) )
1600                                                 {
1601                                                         continue;
1602                                                 }
1603
1604                                                 if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_peer_name ) != 0 ) {
1605                                                         continue;
1606                                                 }
1607
1608                                         /* extract IP and try exact match */
1609                                         } else if ( b->a_peername_style == ACL_STYLE_IP ) {
1610                                                 char            *port;
1611                                                 char            buf[] = "255.255.255.255";
1612                                                 struct berval   ip;
1613                                                 unsigned long   addr;
1614                                                 int             port_number = -1;
1615
1616                                                 if ( strncasecmp( op->o_conn->c_peer_name.bv_val,
1617                                                                         acl_bv_ip_eq.bv_val,
1618                                                                         acl_bv_ip_eq.bv_len ) != 0 )
1619                                                         continue;
1620
1621                                                 ip.bv_val = op->o_conn->c_peer_name.bv_val + acl_bv_ip_eq.bv_len;
1622                                                 ip.bv_len = op->o_conn->c_peer_name.bv_len - acl_bv_ip_eq.bv_len;
1623
1624                                                 port = strrchr( ip.bv_val, ':' );
1625                                                 if ( port ) {
1626                                                         ip.bv_len = port - ip.bv_val;
1627                                                         ++port;
1628                                                         if ( lutil_atoi( &port_number, port ) != 0 )
1629                                                                 continue;
1630                                                 }
1631
1632                                                 /* the port check can be anticipated here */
1633                                                 if ( b->a_peername_port != -1 && port_number != b->a_peername_port )
1634                                                         continue;
1635
1636                                                 /* address longer than expected? */
1637                                                 if ( ip.bv_len >= sizeof(buf) )
1638                                                         continue;
1639
1640                                                 AC_MEMCPY( buf, ip.bv_val, ip.bv_len );
1641                                                 buf[ ip.bv_len ] = '\0';
1642
1643                                                 addr = inet_addr( buf );
1644
1645                                                 /* unable to convert? */
1646                                                 if ( addr == (unsigned long)(-1) )
1647                                                         continue;
1648
1649                                                 if ( (addr & b->a_peername_mask) != b->a_peername_addr )
1650                                                         continue;
1651
1652 #ifdef LDAP_PF_LOCAL
1653                                         /* extract path and try exact match */
1654                                         } else if ( b->a_peername_style == ACL_STYLE_PATH ) {
1655                                                 struct berval path;
1656
1657                                                 if ( strncmp( op->o_conn->c_peer_name.bv_val,
1658                                                                         acl_bv_path_eq.bv_val,
1659                                                                         acl_bv_path_eq.bv_len ) != 0 )
1660                                                         continue;
1661
1662                                                 path.bv_val = op->o_conn->c_peer_name.bv_val
1663                                                         + acl_bv_path_eq.bv_len;
1664                                                 path.bv_len = op->o_conn->c_peer_name.bv_len
1665                                                         - acl_bv_path_eq.bv_len;
1666
1667                                                 if ( ber_bvcmp( &b->a_peername_pat, &path ) != 0 )
1668                                                         continue;
1669
1670 #endif /* LDAP_PF_LOCAL */
1671
1672                                         /* exact match (very unlikely...) */
1673                                         } else if ( ber_bvcmp( &op->o_conn->c_peer_name, &b->a_peername_pat ) != 0 ) {
1674                                                         continue;
1675                                         }
1676                                 }
1677                         }
1678                 }
1679
1680                 if ( !BER_BVISEMPTY( &b->a_sockname_pat ) ) {
1681                         if ( BER_BVISNULL( &op->o_conn->c_sock_name ) ) {
1682                                 continue;
1683                         }
1684                         Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
1685                                 b->a_sockname_pat.bv_val, 0, 0 );
1686                         if ( !ber_bvccmp( &b->a_sockname_pat, '*' ) ) {
1687                                 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
1688                                         if (!regex_matches( &b->a_sockname_pat, op->o_conn->c_sock_name.bv_val,
1689                                                         e->e_ndn, nmatch, matches ) )
1690                                         {
1691                                                 continue;
1692                                         }
1693
1694                                 } else if ( b->a_sockname_style == ACL_STYLE_EXPAND ) {
1695                                         struct berval   bv;
1696                                         char buf[ACL_BUF_SIZE];
1697
1698                                         bv.bv_len = sizeof( buf ) - 1;
1699                                         bv.bv_val = buf;
1700                                         if ( acl_string_expand( &bv, &b->a_sockname_pat,
1701                                                         e->e_ndn, nmatch, matches ) )
1702                                         {
1703                                                 continue;
1704                                         }
1705
1706                                         if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_sock_name ) != 0 ) {
1707                                                 continue;
1708                                         }
1709
1710                                 } else {
1711                                         if ( ber_bvstrcasecmp( &b->a_sockname_pat, &op->o_conn->c_sock_name ) != 0 ) {
1712                                                 continue;
1713                                         }
1714                                 }
1715                         }
1716                 }
1717
1718                 if ( b->a_dn_at != NULL ) {
1719                         if ( acl_mask_dnattr( op, e, val, a, b, i,
1720                                         matches, count, state,
1721                                         &b->a_dn, &op->o_ndn ) )
1722                         {
1723                                 continue;
1724                         }
1725                 }
1726
1727                 if ( b->a_realdn_at != NULL ) {
1728                         struct berval   ndn;
1729
1730                         if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) )
1731                         {
1732                                 ndn = op->o_conn->c_ndn;
1733                         } else {
1734                                 ndn = op->o_ndn;
1735                         }
1736
1737                         if ( acl_mask_dnattr( op, e, val, a, b, i,
1738                                         matches, count, state,
1739                                         &b->a_realdn, &ndn ) )
1740                         {
1741                                 continue;
1742                         }
1743                 }
1744
1745                 if ( !BER_BVISEMPTY( &b->a_group_pat ) ) {
1746                         struct berval bv;
1747                         struct berval ndn = BER_BVNULL;
1748                         int rc;
1749
1750                         if ( op->o_ndn.bv_len == 0 ) {
1751                                 continue;
1752                         }
1753
1754                         Debug( LDAP_DEBUG_ACL, "<= check a_group_pat: %s\n",
1755                                 b->a_group_pat.bv_val, 0, 0 );
1756
1757                         /* b->a_group is an unexpanded entry name, expanded it should be an
1758                          * entry with objectclass group* and we test to see if odn is one of
1759                          * the values in the attribute group
1760                          */
1761                         /* see if asker is listed in dnattr */
1762                         if ( b->a_group_style == ACL_STYLE_EXPAND ) {
1763                                 char            buf[ACL_BUF_SIZE];
1764                                 int             tmp_nmatch;
1765                                 regmatch_t      tmp_matches[2],
1766                                                 *tmp_matchesp = tmp_matches;
1767
1768                                 bv.bv_len = sizeof(buf) - 1;
1769                                 bv.bv_val = buf;
1770
1771                                 rc = 0;
1772
1773                                 switch ( a->acl_dn_style ) {
1774                                 case ACL_STYLE_REGEX:
1775                                         if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1776                                                 tmp_matchesp = matches;
1777                                                 tmp_nmatch = nmatch;
1778                                                 break;
1779                                         }
1780
1781                                 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1782                                 case ACL_STYLE_BASE:
1783                                         tmp_matches[0].rm_so = 0;
1784                                         tmp_matches[0].rm_eo = e->e_nname.bv_len;
1785                                         tmp_nmatch = 1;
1786                                         break;
1787
1788                                 case ACL_STYLE_ONE:
1789                                 case ACL_STYLE_SUBTREE:
1790                                 case ACL_STYLE_CHILDREN:
1791                                         tmp_matches[0].rm_so = 0;
1792                                         tmp_matches[0].rm_eo = e->e_nname.bv_len;
1793                                         tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1794                                         tmp_matches[1].rm_eo = e->e_nname.bv_len;
1795                                         tmp_nmatch = 2;
1796                                         break;
1797
1798                                 default:
1799                                         /* error */
1800                                         rc = 1;
1801                                         break;
1802                                 }
1803
1804                                 if ( rc ) {
1805                                         continue;
1806                                 }
1807
1808                                 if ( acl_string_expand( &bv, &b->a_group_pat,
1809                                                 e->e_nname.bv_val,
1810                                                 tmp_nmatch, tmp_matchesp ) )
1811                                 {
1812                                         continue;
1813                                 }
1814
1815                                 if ( dnNormalize( 0, NULL, NULL, &bv, &ndn,
1816                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1817                                 {
1818                                         /* did not expand to a valid dn */
1819                                         continue;
1820                                 }
1821
1822                                 bv = ndn;
1823
1824                         } else {
1825                                 bv = b->a_group_pat;
1826                         }
1827
1828                         rc = backend_group( op, e, &bv, &op->o_ndn,
1829                                 b->a_group_oc, b->a_group_at );
1830
1831                         if ( ndn.bv_val ) {
1832                                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
1833                         }
1834
1835                         if ( rc != 0 ) {
1836                                 continue;
1837                         }
1838                 }
1839
1840                 if ( !BER_BVISEMPTY( &b->a_set_pat ) ) {
1841                         struct berval   bv;
1842                         char            buf[ACL_BUF_SIZE];
1843
1844                         Debug( LDAP_DEBUG_ACL, "<= check a_set_pat: %s\n",
1845                                 b->a_set_pat.bv_val, 0, 0 );
1846
1847                         if ( b->a_set_style == ACL_STYLE_EXPAND ) {
1848                                 int             tmp_nmatch;
1849                                 regmatch_t      tmp_matches[2],
1850                                                 *tmp_matchesp = tmp_matches;
1851                                 int             rc = 0;
1852
1853                                 bv.bv_len = sizeof( buf ) - 1;
1854                                 bv.bv_val = buf;
1855
1856                                 rc = 0;
1857
1858                                 switch ( a->acl_dn_style ) {
1859                                 case ACL_STYLE_REGEX:
1860                                         if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1861                                                 tmp_matchesp = matches;
1862                                                 tmp_nmatch = nmatch;
1863                                                 break;
1864                                         }
1865
1866                                 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1867                                 case ACL_STYLE_BASE:
1868                                         tmp_matches[0].rm_so = 0;
1869                                         tmp_matches[0].rm_eo = e->e_nname.bv_len;
1870                                         tmp_nmatch = 1;
1871                                         break;
1872
1873                                 case ACL_STYLE_ONE:
1874                                 case ACL_STYLE_SUBTREE:
1875                                 case ACL_STYLE_CHILDREN:
1876                                         tmp_matches[0].rm_so = 0;
1877                                         tmp_matches[0].rm_eo = e->e_nname.bv_len;
1878                                         tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1879                                         tmp_matches[1].rm_eo = e->e_nname.bv_len;
1880                                         tmp_nmatch = 2;
1881                                         break;
1882
1883                                 default:
1884                                         /* error */
1885                                         rc = 1;
1886                                         break;
1887                                 }
1888
1889                                 if ( rc ) {
1890                                         continue;
1891                                 }
1892
1893                                 if ( acl_string_expand( &bv, &b->a_set_pat,
1894                                                 e->e_nname.bv_val,
1895                                                 tmp_nmatch, tmp_matchesp ) )
1896                                 {
1897                                         continue;
1898                                 }
1899
1900                         } else {
1901                                 bv = b->a_set_pat;
1902                         }
1903
1904                         if ( acl_match_set( &bv, op, e, NULL ) == 0 ) {
1905                                 continue;
1906                         }
1907                 }
1908
1909                 if ( b->a_authz.sai_ssf ) {
1910                         Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
1911                                 b->a_authz.sai_ssf, op->o_ssf, 0 );
1912                         if ( b->a_authz.sai_ssf >  op->o_ssf ) {
1913                                 continue;
1914                         }
1915                 }
1916
1917                 if ( b->a_authz.sai_transport_ssf ) {
1918                         Debug( LDAP_DEBUG_ACL,
1919                                 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
1920                                 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
1921                         if ( b->a_authz.sai_transport_ssf >  op->o_transport_ssf ) {
1922                                 continue;
1923                         }
1924                 }
1925
1926                 if ( b->a_authz.sai_tls_ssf ) {
1927                         Debug( LDAP_DEBUG_ACL,
1928                                 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
1929                                 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
1930                         if ( b->a_authz.sai_tls_ssf >  op->o_tls_ssf ) {
1931                                 continue;
1932                         }
1933                 }
1934
1935                 if ( b->a_authz.sai_sasl_ssf ) {
1936                         Debug( LDAP_DEBUG_ACL,
1937                                 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
1938                                 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
1939                         if ( b->a_authz.sai_sasl_ssf >  op->o_sasl_ssf ) {
1940                                 continue;
1941                         }
1942                 }
1943
1944 #ifdef SLAP_DYNACL
1945                 if ( b->a_dynacl ) {
1946                         slap_dynacl_t   *da;
1947                         slap_access_t   tgrant, tdeny;
1948
1949                         Debug( LDAP_DEBUG_ACL, "<= check a_dynacl\n",
1950                                 0, 0, 0 );
1951
1952                         /* this case works different from the others above.
1953                          * since dynamic ACL's themselves give permissions, we need
1954                          * to first check b->a_access_mask, the ACL's access level.
1955                          */
1956                         /* first check if the right being requested
1957                          * is allowed by the ACL clause.
1958                          */
1959                         if ( ! ACL_PRIV_ISSET( b->a_access_mask, a2pmask ) ) {
1960                                 continue;
1961                         }
1962
1963                         /* start out with nothing granted, nothing denied */
1964                         ACL_INVALIDATE(tgrant);
1965                         ACL_INVALIDATE(tdeny);
1966
1967                         for ( da = b->a_dynacl; da; da = da->da_next ) {
1968                                 slap_access_t   grant,
1969                                                 deny;
1970
1971                                 ACL_INVALIDATE(grant);
1972                                 ACL_INVALIDATE(deny);
1973
1974                                 Debug( LDAP_DEBUG_ACL, "    <= check a_dynacl: %s\n",
1975                                         da->da_name, 0, 0 );
1976
1977                                 (void)( *da->da_mask )( da->da_private, op, e, desc, val, nmatch, matches, &grant, &deny );
1978
1979                                 tgrant |= grant;
1980                                 tdeny |= deny;
1981                         }
1982
1983                         /* remove anything that the ACL clause does not allow */
1984                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
1985                         tdeny &= ACL_PRIV_MASK;
1986
1987                         /* see if we have anything to contribute */
1988                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
1989                                 continue;
1990                         }
1991
1992                         /* this could be improved by changing slap_acl_mask so that it can deal with
1993                          * by clauses that return grant/deny pairs.  Right now, it does either
1994                          * additive or subtractive rights, but not both at the same time.  So,
1995                          * we need to combine the grant/deny pair into a single rights mask in
1996                          * a smart way:  if either grant or deny is "empty", then we use the
1997                          * opposite as is, otherwise we remove any denied rights from the grant
1998                          * rights mask and construct an additive mask.
1999                          */
2000                         if (ACL_IS_INVALID(tdeny)) {
2001                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
2002
2003                         } else if (ACL_IS_INVALID(tgrant)) {
2004                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
2005
2006                         } else {
2007                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
2008                         }
2009
2010                 } else
2011 #else /* !SLAP_DYNACL */
2012
2013                 /* NOTE: this entire block can be eliminated when SLAP_DYNACL
2014                  * moves outside of LDAP_DEVEL */
2015 #ifdef SLAPD_ACI_ENABLED
2016                 if ( b->a_aci_at != NULL ) {
2017                         Attribute       *at;
2018                         slap_access_t   grant, deny, tgrant, tdeny;
2019                         struct berval   parent_ndn;
2020                         BerVarray       bvals = NULL;
2021                         int             ret, stop;
2022 #ifdef LDAP_DEBUG
2023                         char            accessmaskbuf1[ACCESSMASK_MAXLEN];
2024 #endif /* DEBUG */
2025
2026                         Debug( LDAP_DEBUG_ACL, "    <= check a_aci_at: %s\n",
2027                                 b->a_aci_at->ad_cname.bv_val, 0, 0 );
2028
2029                         /* this case works different from the others above.
2030                          * since aci's themselves give permissions, we need
2031                          * to first check b->a_access_mask, the ACL's access level.
2032                          */
2033
2034                         if ( BER_BVISEMPTY( &e->e_nname ) ) {
2035                                 /* no ACIs in the root DSE */
2036                                 continue;
2037                         }
2038
2039                         /* first check if the right being requested
2040                          * is allowed by the ACL clause.
2041                          */
2042                         if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
2043                                 continue;
2044                         }
2045                         /* start out with nothing granted, nothing denied */
2046                         ACL_INIT(tgrant);
2047                         ACL_INIT(tdeny);
2048
2049                         /* get the aci attribute */
2050                         at = attr_find( e->e_attrs, b->a_aci_at );
2051                         if ( at != NULL ) {
2052 #if 0
2053                                 /* FIXME: this breaks acl caching;
2054                                  * see also ACL_RECORD_VALUE_STATE below */
2055                                 ACL_RECORD_VALUE_STATE;
2056 #endif
2057                                 /* the aci is an multi-valued attribute.  The
2058                                 * rights are determined by OR'ing the individual
2059                                 * rights given by the acis.
2060                                 */
2061                                 for ( i = 0; !BER_BVISNULL( &at->a_nvals[i] ); i++ ) {
2062                                         if ( aci_mask( op,
2063                                                 e, desc, val,
2064                                                 &at->a_nvals[i],
2065                                                 nmatch, matches,
2066                                                 &grant, &deny, SLAP_ACI_SCOPE_ENTRY ) != 0 )
2067                                         {
2068                                                 tgrant |= grant;
2069                                                 tdeny |= deny;
2070                                         }
2071                                 }
2072                                 Debug(LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n",
2073                                           accessmask2str(tgrant, accessmaskbuf, 1),
2074                                           accessmask2str(tdeny, accessmaskbuf1, 1), 0);
2075
2076                         }
2077                         /* If the entry level aci didn't contain anything valid for the
2078                          * current operation, climb up the tree and evaluate the
2079                          * acis with scope set to subtree
2080                          */
2081                         if ( (tgrant == ACL_PRIV_NONE) && (tdeny == ACL_PRIV_NONE) ) {
2082                                 dnParent( &e->e_nname, &parent_ndn );
2083                                 while ( !BER_BVISEMPTY( &parent_ndn ) ) {
2084                                         Debug(LDAP_DEBUG_ACL, "checking ACI of %s\n", parent_ndn.bv_val, 0, 0);
2085                                         ret = backend_attribute(op, NULL, &parent_ndn, b->a_aci_at, &bvals, ACL_AUTH);
2086                                         switch(ret){
2087                                         case LDAP_SUCCESS :
2088                                                 stop = 0;
2089                                                 if (!bvals){
2090                                                         break;
2091                                                 }
2092
2093                                                 for ( i = 0; !BER_BVISNULL( &bvals[i] ); i++ ) {
2094 #if 0
2095                                                         /* FIXME: this breaks acl caching;
2096                                                          * see also ACL_RECORD_VALUE_STATE above */
2097                                                         ACL_RECORD_VALUE_STATE;
2098 #endif
2099                                                         if ( aci_mask( op, e, desc, val, &bvals[i],
2100                                                                         nmatch, matches,
2101                                                                         &grant, &deny, SLAP_ACI_SCOPE_CHILDREN ) != 0 )
2102                                                         {
2103                                                                 tgrant |= grant;
2104                                                                 tdeny |= deny;
2105                                                                 /* evaluation stops as soon as either a "deny" or a
2106                                                                  * "grant" directive matches.
2107                                                                  */
2108                                                                 if( (tgrant != ACL_PRIV_NONE) || (tdeny != ACL_PRIV_NONE) ){
2109                                                                         stop = 1;
2110                                                                 }
2111                                                         }
2112                                                         Debug(LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n",
2113                                                                 accessmask2str(tgrant, accessmaskbuf, 1),
2114                                                                 accessmask2str(tdeny, accessmaskbuf1, 1), 0);
2115                                                 }
2116                                                 break;
2117
2118                                         case LDAP_NO_SUCH_ATTRIBUTE:
2119                                                 /* just go on if the aci-Attribute is not present in
2120                                                  * the current entry
2121                                                  */
2122                                                 Debug(LDAP_DEBUG_ACL, "no such attribute\n", 0, 0, 0);
2123                                                 stop = 0;
2124                                                 break;
2125
2126                                         case LDAP_NO_SUCH_OBJECT:
2127                                                 /* We have reached the base object */
2128                                                 Debug(LDAP_DEBUG_ACL, "no such object\n", 0, 0, 0);
2129                                                 stop = 1;
2130                                                 break;
2131
2132                                         default:
2133                                                 stop = 1;
2134                                                 break;
2135                                         }
2136                                         if (stop){
2137                                                 break;
2138                                         }
2139                                         dnParent( &parent_ndn, &parent_ndn );
2140                                 }
2141                         }
2142
2143
2144                         /* remove anything that the ACL clause does not allow */
2145                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
2146                         tdeny &= ACL_PRIV_MASK;
2147
2148                         /* see if we have anything to contribute */
2149                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
2150                                 continue;
2151                         }
2152
2153                         /* this could be improved by changing slap_acl_mask so that it can deal with
2154                          * by clauses that return grant/deny pairs.  Right now, it does either
2155                          * additive or subtractive rights, but not both at the same time.  So,
2156                          * we need to combine the grant/deny pair into a single rights mask in
2157                          * a smart way:  if either grant or deny is "empty", then we use the
2158                          * opposite as is, otherwise we remove any denied rights from the grant
2159                          * rights mask and construct an additive mask.
2160                          */
2161                         if (ACL_IS_INVALID(tdeny)) {
2162                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
2163
2164                         } else if (ACL_IS_INVALID(tgrant)) {
2165                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
2166
2167                         } else {
2168                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
2169                         }
2170
2171                 } else
2172 #endif /* SLAPD_ACI_ENABLED */
2173 #endif /* !SLAP_DYNACL */
2174                 {
2175                         modmask = b->a_access_mask;
2176                 }
2177
2178                 Debug( LDAP_DEBUG_ACL,
2179                         "<= acl_mask: [%d] applying %s (%s)\n",
2180                         i, accessmask2str( modmask, accessmaskbuf, 1 ),
2181                         b->a_type == ACL_CONTINUE
2182                                 ? "continue"
2183                                 : b->a_type == ACL_BREAK
2184                                         ? "break"
2185                                         : "stop" );
2186                 /* save old mask */
2187                 oldmask = *mask;
2188
2189                 if( ACL_IS_ADDITIVE(modmask) ) {
2190                         /* add privs */
2191                         ACL_PRIV_SET( *mask, modmask );
2192
2193                         /* cleanup */
2194                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
2195
2196                 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
2197                         /* substract privs */
2198                         ACL_PRIV_CLR( *mask, modmask );
2199
2200                         /* cleanup */
2201                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
2202
2203                 } else {
2204                         /* assign privs */
2205                         *mask = modmask;
2206                 }
2207
2208                 a2pmask = *mask;
2209
2210                 Debug( LDAP_DEBUG_ACL,
2211                         "<= acl_mask: [%d] mask: %s\n",
2212                         i, accessmask2str(*mask, accessmaskbuf, 1), 0 );
2213
2214                 if( b->a_type == ACL_CONTINUE ) {
2215                         continue;
2216
2217                 } else if ( b->a_type == ACL_BREAK ) {
2218                         return ACL_BREAK;
2219
2220                 } else {
2221                         return ACL_STOP;
2222                 }
2223         }
2224
2225         /* implicit "by * none" clause */
2226         ACL_INIT(*mask);
2227
2228         Debug( LDAP_DEBUG_ACL,
2229                 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
2230                 accessmask2str(*mask, accessmaskbuf, 1), 0, 0 );
2231         return ACL_STOP;
2232 }
2233
2234 /*
2235  * acl_check_modlist - check access control on the given entry to see if
2236  * it allows the given modifications by the user associated with op.
2237  * returns      1       if mods allowed ok
2238  *              0       mods not allowed
2239  */
2240
2241 int
2242 acl_check_modlist(
2243         Operation       *op,
2244         Entry   *e,
2245         Modifications   *mlist )
2246 {
2247         struct berval *bv;
2248         AccessControlState state = ACL_STATE_INIT;
2249         Backend *be;
2250         int be_null = 0;
2251         int ret = 1; /* default is access allowed */
2252
2253         be = op->o_bd;
2254         if ( be == NULL ) {
2255                 be = LDAP_STAILQ_FIRST(&backendDB);
2256                 be_null = 1;
2257                 op->o_bd = be;
2258         }
2259         assert( be != NULL );
2260
2261         /* short circuit root database access */
2262         if ( be_isroot( op ) ) {
2263                 Debug( LDAP_DEBUG_ACL,
2264                         "<= acl_access_allowed: granted to database root\n",
2265                     0, 0, 0 );
2266                 goto done;
2267         }
2268
2269         /* use backend default access if no backend acls */
2270         if( op->o_bd != NULL && op->o_bd->be_acl == NULL ) {
2271                 Debug( LDAP_DEBUG_ACL,
2272                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
2273                         access2str( ACL_WRITE ),
2274                         op->o_bd->be_dfltaccess >= ACL_WRITE
2275                                 ? "granted" : "denied",
2276                         op->o_dn.bv_val );
2277                 ret = (op->o_bd->be_dfltaccess >= ACL_WRITE);
2278                 goto done;
2279         }
2280
2281         for ( ; mlist != NULL; mlist = mlist->sml_next ) {
2282                 /*
2283                  * Internal mods are ignored by ACL_WRITE checking
2284                  */
2285                 if ( mlist->sml_flags & SLAP_MOD_INTERNAL ) {
2286                         Debug( LDAP_DEBUG_ACL, "acl: internal mod %s:"
2287                                 " modify access granted\n",
2288                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
2289                         continue;
2290                 }
2291
2292                 /*
2293                  * no-user-modification operational attributes are ignored
2294                  * by ACL_WRITE checking as any found here are not provided
2295                  * by the user
2296                  */
2297                 if ( is_at_no_user_mod( mlist->sml_desc->ad_type )
2298                                 && ! ( mlist->sml_flags & SLAP_MOD_MANAGING ) )
2299                 {
2300                         Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
2301                                 " modify access granted\n",
2302                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
2303                         continue;
2304                 }
2305
2306                 switch ( mlist->sml_op ) {
2307                 case LDAP_MOD_REPLACE:
2308                 case LDAP_MOD_INCREMENT:
2309                         /*
2310                          * We must check both permission to delete the whole
2311                          * attribute and permission to add the specific attributes.
2312                          * This prevents abuse from selfwriters.
2313                          */
2314                         if ( ! access_allowed( op, e,
2315                                 mlist->sml_desc, NULL,
2316                                 ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL,
2317                                 &state ) )
2318                         {
2319                                 ret = 0;
2320                                 goto done;
2321                         }
2322
2323                         if ( mlist->sml_values == NULL ) break;
2324
2325                         /* fall thru to check value to add */
2326
2327                 case LDAP_MOD_ADD:
2328                         assert( mlist->sml_values != NULL );
2329
2330                         for ( bv = mlist->sml_nvalues
2331                                         ? mlist->sml_nvalues : mlist->sml_values;
2332                                 bv->bv_val != NULL; bv++ )
2333                         {
2334                                 if ( ! access_allowed( op, e,
2335                                         mlist->sml_desc, bv,
2336                                         ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WADD,
2337                                         &state ) )
2338                                 {
2339                                         ret = 0;
2340                                         goto done;
2341                                 }
2342                         }
2343                         break;
2344
2345                 case LDAP_MOD_DELETE:
2346                         if ( mlist->sml_values == NULL ) {
2347                                 if ( ! access_allowed( op, e,
2348                                         mlist->sml_desc, NULL,
2349                                         ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL,
2350                                         NULL ) )
2351                                 {
2352                                         ret = 0;
2353                                         goto done;
2354                                 }
2355                                 break;
2356                         }
2357                         for ( bv = mlist->sml_nvalues
2358                                         ? mlist->sml_nvalues : mlist->sml_values;
2359                                 bv->bv_val != NULL; bv++ )
2360                         {
2361                                 if ( ! access_allowed( op, e,
2362                                         mlist->sml_desc, bv,
2363                                         ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL,
2364                                         &state ) )
2365                                 {
2366                                         ret = 0;
2367                                         goto done;
2368                                 }
2369                         }
2370                         break;
2371
2372                 case SLAP_MOD_SOFTADD:
2373                         /* allow adding attribute via modrdn thru */
2374                         break;
2375
2376                 default:
2377                         assert( 0 );
2378                         /* not reached */
2379                         ret = 0;
2380                         break;
2381                 }
2382         }
2383
2384 done:
2385         if (be_null) op->o_bd = NULL;
2386         return( ret );
2387 }
2388
2389 int
2390 acl_get_part(
2391         struct berval   *list,
2392         int             ix,
2393         char            sep,
2394         struct berval   *bv )
2395 {
2396         int     len;
2397         char    *p;
2398
2399         if ( bv ) {
2400                 BER_BVZERO( bv );
2401         }
2402         len = list->bv_len;
2403         p = list->bv_val;
2404         while ( len >= 0 && --ix >= 0 ) {
2405                 while ( --len >= 0 && *p++ != sep )
2406                         ;
2407         }
2408         while ( len >= 0 && *p == ' ' ) {
2409                 len--;
2410                 p++;
2411         }
2412         if ( len < 0 ) {
2413                 return -1;
2414         }
2415
2416         if ( !bv ) {
2417                 return 0;
2418         }
2419
2420         bv->bv_val = p;
2421         while ( --len >= 0 && *p != sep ) {
2422                 bv->bv_len++;
2423                 p++;
2424         }
2425         while ( bv->bv_len > 0 && *--p == ' ' ) {
2426                 bv->bv_len--;
2427         }
2428
2429         return bv->bv_len;
2430 }
2431
2432 typedef struct acl_set_gather_t {
2433         SetCookie               *cookie;
2434         BerVarray               bvals;
2435 } acl_set_gather_t;
2436
2437 static int
2438 acl_set_cb_gather( Operation *op, SlapReply *rs )
2439 {
2440         acl_set_gather_t        *p = (acl_set_gather_t *)op->o_callback->sc_private;
2441
2442         if ( rs->sr_type == REP_SEARCH ) {
2443                 BerValue        bvals[ 2 ];
2444                 BerVarray       bvalsp = NULL;
2445                 int             j;
2446
2447                 for ( j = 0; !BER_BVISNULL( &rs->sr_attrs[ j ].an_name ); j++ ) {
2448                         AttributeDescription    *desc = rs->sr_attrs[ j ].an_desc;
2449
2450                         if ( desc == slap_schema.si_ad_entryDN ) {
2451                                 bvalsp = bvals;
2452                                 bvals[ 0 ] = rs->sr_entry->e_nname;
2453                                 BER_BVZERO( &bvals[ 1 ] );
2454
2455                         } else {
2456                                 Attribute       *a;
2457
2458                                 a = attr_find( rs->sr_entry->e_attrs, desc );
2459                                 if ( a != NULL ) {
2460                                         int     i;
2461
2462                                         for ( i = 0; !BER_BVISNULL( &a->a_nvals[ i ] ); i++ )
2463                                                 ;
2464
2465                                         bvalsp = a->a_nvals;
2466                                 }
2467                         }
2468                 }
2469
2470                 if ( bvals ) {
2471                         p->bvals = slap_set_join( p->cookie, p->bvals,
2472                                         ( '|' | SLAP_SET_RREF ), bvalsp );
2473                 }
2474
2475         } else {
2476                 assert( rs->sr_type == REP_RESULT );
2477         }
2478
2479         return 0;
2480 }
2481
2482 BerVarray
2483 acl_set_gather( SetCookie *cookie, struct berval *name, AttributeDescription *desc )
2484 {
2485         AclSetCookie            *cp = (AclSetCookie *)cookie;
2486         int                     rc = 0;
2487         LDAPURLDesc             *ludp = NULL;
2488         Operation               op2 = { 0 };
2489         SlapReply               rs = {REP_RESULT};
2490         AttributeName           anlist[ 2 ], *anlistp = NULL;
2491         int                     nattrs = 0;
2492         slap_callback           cb = { NULL, acl_set_cb_gather, NULL, NULL };
2493         acl_set_gather_t        p = { 0 };
2494         const char              *text = NULL;
2495         static struct berval    defaultFilter_bv = BER_BVC( "(objectClass=*)" );
2496
2497         /* this routine needs to return the bervals instead of
2498          * plain strings, since syntax is not known.  It should
2499          * also return the syntax or some "comparison cookie".
2500          */
2501         if ( strncasecmp( name->bv_val, "ldap:///", STRLENOF( "ldap:///" ) ) != 0 ) {
2502                 return acl_set_gather2( cookie, name, desc );
2503         }
2504
2505         rc = ldap_url_parse( name->bv_val, &ludp );
2506         if ( rc != LDAP_URL_SUCCESS ) {
2507                 rc = LDAP_PROTOCOL_ERROR;
2508                 goto url_done;
2509         }
2510
2511         if ( ( ludp->lud_host && ludp->lud_host[0] ) || ludp->lud_exts )
2512         {
2513                 /* host part must be empty */
2514                 /* extensions parts must be empty */
2515                 rc = LDAP_PROTOCOL_ERROR;
2516                 goto url_done;
2517         }
2518
2519         /* Grab the searchbase and see if an appropriate database can be found */
2520         ber_str2bv( ludp->lud_dn, 0, 0, &op2.o_req_dn );
2521         rc = dnNormalize( 0, NULL, NULL, &op2.o_req_dn,
2522                         &op2.o_req_ndn, cp->asc_op->o_tmpmemctx );
2523         BER_BVZERO( &op2.o_req_dn );
2524         if ( rc != LDAP_SUCCESS ) {
2525                 goto url_done;
2526         }
2527
2528         op2.o_bd = select_backend( &op2.o_req_ndn, 0, 1 );
2529         if ( ( op2.o_bd == NULL ) || ( op2.o_bd->be_search == NULL ) ) {
2530                 rc = LDAP_NO_SUCH_OBJECT;
2531                 goto url_done;
2532         }
2533
2534         /* Grab the filter */
2535         if ( ludp->lud_filter ) {
2536                 ber_str2bv_x( ludp->lud_filter, 0, 0, &op2.ors_filterstr,
2537                                 cp->asc_op->o_tmpmemctx );
2538
2539         } else {
2540                 op2.ors_filterstr = defaultFilter_bv;
2541         }
2542
2543         op2.ors_filter = str2filter_x( cp->asc_op, op2.ors_filterstr.bv_val );
2544         if ( op2.ors_filter == NULL ) {
2545                 rc = LDAP_PROTOCOL_ERROR;
2546                 goto url_done;
2547         }
2548
2549         /* Grab the scope */
2550         op2.ors_scope = ludp->lud_scope;
2551
2552         /* Grap the attributes */
2553         if ( ludp->lud_attrs ) {
2554                 for ( ; ludp->lud_attrs[ nattrs ]; nattrs++ )
2555                         ;
2556
2557                 anlistp = slap_sl_malloc( sizeof( AttributeName ) * ( nattrs + 2 ),
2558                                 cp->asc_op->o_tmpmemctx );
2559
2560                 for ( ; ludp->lud_attrs[ nattrs ]; nattrs++ ) {
2561                         ber_str2bv( ludp->lud_attrs[ nattrs ], 0, 0, &anlistp[ nattrs ].an_name );
2562                         anlistp[ nattrs ].an_desc = NULL;
2563                         rc = slap_bv2ad( &anlistp[ nattrs ].an_name,
2564                                         &anlistp[ nattrs ].an_desc, &text );
2565                         if ( rc != LDAP_SUCCESS ) {
2566                                 goto url_done;
2567                         }
2568                 }
2569
2570         } else {
2571                 anlistp = anlist;
2572         }
2573
2574         anlistp[ nattrs ].an_name = desc->ad_cname;
2575         anlistp[ nattrs ].an_desc = desc;
2576
2577         BER_BVZERO( &anlistp[ nattrs + 1 ].an_name );
2578
2579         p.cookie = cookie;
2580
2581         op2.o_hdr = cp->asc_op->o_hdr;
2582         op2.o_tag = LDAP_REQ_SEARCH;
2583         op2.o_ndn = op2.o_bd->be_rootndn;
2584         op2.o_callback = &cb;
2585         slap_op_time( &op2.o_time, &op2.o_tincr );
2586         op2.o_do_not_cache = 1;
2587         op2.o_is_auth_check = 0;
2588         ber_dupbv_x( &op2.o_req_dn, &op2.o_req_ndn, cp->asc_op->o_tmpmemctx );
2589         op2.ors_slimit = SLAP_NO_LIMIT;
2590         op2.ors_tlimit = SLAP_NO_LIMIT;
2591         op2.ors_attrs = anlistp;
2592         op2.ors_attrsonly = 0;
2593         op2.o_private = cp->asc_op->o_private;
2594
2595         cb.sc_private = &p;
2596
2597         rc = op2.o_bd->be_search( &op2, &rs );
2598         if ( rc != 0 ) {
2599                 goto url_done;
2600         }
2601
2602 url_done:;
2603         if ( op2.ors_filter ) {
2604                 filter_free_x( cp->asc_op, op2.ors_filter );
2605         }
2606         if ( !BER_BVISNULL( &op2.o_req_ndn ) ) {
2607                 slap_sl_free( op2.o_req_ndn.bv_val, cp->asc_op->o_tmpmemctx );
2608         }
2609         if ( !BER_BVISNULL( &op2.o_req_dn ) ) {
2610                 slap_sl_free( op2.o_req_dn.bv_val, cp->asc_op->o_tmpmemctx );
2611         }
2612         if ( ludp ) {
2613                 ldap_free_urldesc( ludp );
2614         }
2615         if ( anlistp && anlistp != anlist ) {
2616                 slap_sl_free( anlistp, cp->asc_op->o_tmpmemctx );
2617         }
2618
2619         return p.bvals;
2620 }
2621
2622 BerVarray
2623 acl_set_gather2( SetCookie *cookie, struct berval *name, AttributeDescription *desc )
2624 {
2625         AclSetCookie    *cp = (AclSetCookie *)cookie;
2626         BerVarray       bvals = NULL;
2627         struct berval   ndn;
2628         int             rc = 0;
2629
2630         /* this routine needs to return the bervals instead of
2631          * plain strings, since syntax is not known.  It should
2632          * also return the syntax or some "comparison cookie".
2633          */
2634         rc = dnNormalize( 0, NULL, NULL, name, &ndn, cp->asc_op->o_tmpmemctx );
2635         if ( rc == LDAP_SUCCESS ) {
2636                 if ( desc == slap_schema.si_ad_entryDN ) {
2637                         bvals = (BerVarray)slap_sl_malloc( sizeof( BerValue ) * 2,
2638                                         cp->asc_op->o_tmpmemctx );
2639                         bvals[ 0 ] = ndn;
2640                         BER_BVZERO( &bvals[ 1 ] );
2641                         BER_BVZERO( &ndn );
2642
2643                 } else {
2644                         backend_attribute( cp->asc_op,
2645                                 cp->asc_e, &ndn, desc, &bvals, ACL_NONE );
2646                 }
2647
2648                 if ( !BER_BVISNULL( &ndn ) ) {
2649                         slap_sl_free( ndn.bv_val, cp->asc_op->o_tmpmemctx );
2650                 }
2651         }
2652
2653         return bvals;
2654 }
2655
2656 int
2657 acl_match_set (
2658         struct berval *subj,
2659         Operation *op,
2660         Entry *e,
2661         struct berval *default_set_attribute )
2662 {
2663         struct berval   set = BER_BVNULL;
2664         int             rc = 0;
2665         AclSetCookie    cookie;
2666
2667         if ( default_set_attribute == NULL ) {
2668                 ber_dupbv_x( &set, subj, op->o_tmpmemctx );
2669
2670         } else {
2671                 struct berval           subjdn, ndn = BER_BVNULL;
2672                 struct berval           setat;
2673                 BerVarray               bvals;
2674                 const char              *text;
2675                 AttributeDescription    *desc = NULL;
2676
2677                 /* format of string is "entry/setAttrName" */
2678                 if ( acl_get_part( subj, 0, '/', &subjdn ) < 0 ) {
2679                         return 0;
2680                 }
2681
2682                 if ( acl_get_part( subj, 1, '/', &setat ) < 0 ) {
2683                         setat = *default_set_attribute;
2684                 }
2685
2686                 /*
2687                  * NOTE: dnNormalize honors the ber_len field
2688                  * as the length of the dn to be normalized
2689                  */
2690                 if ( slap_bv2ad( &setat, &desc, &text ) == LDAP_SUCCESS ) {
2691                         if ( dnNormalize( 0, NULL, NULL, &subjdn, &ndn, op->o_tmpmemctx ) == LDAP_SUCCESS )
2692                         {
2693                                 backend_attribute( op, e, &ndn, desc, &bvals, ACL_NONE );
2694                                 if ( bvals != NULL && !BER_BVISNULL( &bvals[0] ) ) {
2695                                         int     i;
2696
2697                                         set = bvals[0];
2698                                         BER_BVZERO( &bvals[0] );
2699                                         for ( i = 1; !BER_BVISNULL( &bvals[i] ); i++ )
2700                                                 /* count */ ;
2701                                         bvals[0].bv_val = bvals[i-1].bv_val;
2702                                         BER_BVZERO( &bvals[i-1] );
2703                                 }
2704                                 ber_bvarray_free_x( bvals, op->o_tmpmemctx );
2705                                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
2706                         }
2707                 }
2708         }
2709
2710         if ( !BER_BVISNULL( &set ) ) {
2711                 cookie.asc_op = op;
2712                 cookie.asc_e = e;
2713                 rc = ( slap_set_filter(
2714                         acl_set_gather,
2715                         (SetCookie *)&cookie, &set,
2716                         &op->o_ndn, &e->e_nname, NULL ) > 0 );
2717                 slap_sl_free( set.bv_val, op->o_tmpmemctx );
2718         }
2719
2720         return(rc);
2721 }
2722
2723 #ifdef SLAP_DYNACL
2724
2725 /*
2726  * dynamic ACL infrastructure
2727  */
2728 static slap_dynacl_t    *da_list = NULL;
2729
2730 int
2731 slap_dynacl_register( slap_dynacl_t *da )
2732 {
2733         slap_dynacl_t   *tmp;
2734
2735         for ( tmp = da_list; tmp; tmp = tmp->da_next ) {
2736                 if ( strcasecmp( da->da_name, tmp->da_name ) == 0 ) {
2737                         break;
2738                 }
2739         }
2740
2741         if ( tmp != NULL ) {
2742                 return -1;
2743         }
2744
2745         if ( da->da_mask == NULL ) {
2746                 return -1;
2747         }
2748
2749         da->da_private = NULL;
2750         da->da_next = da_list;
2751         da_list = da;
2752
2753         return 0;
2754 }
2755
2756 static slap_dynacl_t *
2757 slap_dynacl_next( slap_dynacl_t *da )
2758 {
2759         if ( da ) {
2760                 return da->da_next;
2761         }
2762         return da_list;
2763 }
2764
2765 slap_dynacl_t *
2766 slap_dynacl_get( const char *name )
2767 {
2768         slap_dynacl_t   *da;
2769
2770         for ( da = slap_dynacl_next( NULL ); da; da = slap_dynacl_next( da ) ) {
2771                 if ( strcasecmp( da->da_name, name ) == 0 ) {
2772                         break;
2773                 }
2774         }
2775
2776         return da;
2777 }
2778 #endif /* SLAP_DYNACL */
2779
2780 /*
2781  * statically built-in dynamic ACL initialization
2782  */
2783 static int (*acl_init_func[])( void ) = {
2784 #ifdef SLAPD_ACI_ENABLED
2785 #ifdef SLAP_DYNACL
2786         dynacl_aci_init,
2787 #else /* !SLAP_DYNACL */
2788         aci_init,
2789 #endif /* !SLAP_DYNACL */
2790 #endif /* SLAPD_ACI_ENABLED */
2791
2792         NULL
2793 };
2794
2795 int
2796 acl_init( void )
2797 {
2798         int     i, rc;
2799
2800         for ( i = 0; acl_init_func[ i ] != NULL; i++ ) {
2801                 rc = (*(acl_init_func[ i ]))();
2802                 if ( rc != 0 ) {
2803                         return rc;
2804                 }
2805         }
2806
2807         return 0;
2808 }
2809
2810 int
2811 acl_string_expand(
2812         struct berval   *bv,
2813         struct berval   *pat,
2814         char            *match,
2815         int             nmatch,
2816         regmatch_t      *matches)
2817 {
2818         ber_len_t       size;
2819         char   *sp;
2820         char   *dp;
2821         int     flag;
2822
2823         size = 0;
2824         bv->bv_val[0] = '\0';
2825         bv->bv_len--; /* leave space for lone $ */
2826
2827         flag = 0;
2828         for ( dp = bv->bv_val, sp = pat->bv_val; size < bv->bv_len &&
2829                 sp < pat->bv_val + pat->bv_len ; sp++ )
2830         {
2831                 /* did we previously see a $ */
2832                 if ( flag ) {
2833                         if ( flag == 1 && *sp == '$' ) {
2834                                 *dp++ = '$';
2835                                 size++;
2836                                 flag = 0;
2837
2838                         } else if ( flag == 1 && *sp == '{' /*'}'*/) {
2839                                 flag = 2;
2840
2841                         } else if ( *sp >= '0' && *sp <= '9' ) {
2842                                 int     n;
2843                                 int     i;
2844                                 int     l;
2845
2846                                 n = *sp - '0';
2847
2848                                 if ( flag == 2 ) {
2849                                         for ( sp++; *sp != '\0' && *sp != /*'{'*/ '}'; sp++ ) {
2850                                                 if ( *sp >= '0' && *sp <= '9' ) {
2851                                                         n = 10*n + ( *sp - '0' );
2852                                                 }
2853                                         }
2854
2855                                         if ( *sp != /*'{'*/ '}' ) {
2856                                                 /* FIXME: error */
2857                                                 return 1;
2858                                         }
2859                                 }
2860
2861                                 if ( n >= nmatch ) {
2862                                         /* FIXME: error */
2863                                         return 1;
2864                                 }
2865
2866                                 *dp = '\0';
2867                                 i = matches[n].rm_so;
2868                                 l = matches[n].rm_eo;
2869                                 for ( ; size < bv->bv_len && i < l; size++, i++ ) {
2870                                         *dp++ = match[i];
2871                                 }
2872                                 *dp = '\0';
2873
2874                                 flag = 0;
2875                         }
2876                 } else {
2877                         if (*sp == '$') {
2878                                 flag = 1;
2879                         } else {
2880                                 *dp++ = *sp;
2881                                 size++;
2882                         }
2883                 }
2884         }
2885
2886         if ( flag ) {
2887                 /* must have ended with a single $ */
2888                 *dp++ = '$';
2889                 size++;
2890         }
2891
2892         *dp = '\0';
2893         bv->bv_len = size;
2894
2895         Debug( LDAP_DEBUG_TRACE, "=> acl_string_expand: pattern:  %.*s\n", (int)pat->bv_len, pat->bv_val, 0 );
2896         Debug( LDAP_DEBUG_TRACE, "=> acl_string_expand: expanded: %s\n", bv->bv_val, 0, 0 );
2897
2898         return 0;
2899 }
2900
2901 static int
2902 regex_matches(
2903         struct berval   *pat,           /* pattern to expand and match against */
2904         char            *str,           /* string to match against pattern */
2905         char            *buf,           /* buffer with $N expansion variables */
2906         int             nmatch, /* size of the matches array */
2907         regmatch_t      *matches        /* offsets in buffer for $N expansion variables */
2908 )
2909 {
2910         regex_t re;
2911         char newbuf[ACL_BUF_SIZE];
2912         struct berval bv;
2913         int     rc;
2914
2915         bv.bv_len = sizeof( newbuf ) - 1;
2916         bv.bv_val = newbuf;
2917
2918         if (str == NULL) {
2919                 str = "";
2920         };
2921
2922         acl_string_expand( &bv, pat, buf, nmatch, matches );
2923         rc = regcomp( &re, newbuf, REG_EXTENDED|REG_ICASE );
2924         if ( rc ) {
2925                 char error[ACL_BUF_SIZE];
2926                 regerror( rc, &re, error, sizeof( error ) );
2927
2928                 Debug( LDAP_DEBUG_TRACE,
2929                     "compile( \"%s\", \"%s\") failed %s\n",
2930                         pat->bv_val, str, error );
2931                 return( 0 );
2932         }
2933
2934         rc = regexec( &re, str, 0, NULL, 0 );
2935         regfree( &re );
2936
2937         Debug( LDAP_DEBUG_TRACE,
2938             "=> regex_matches: string:   %s\n", str, 0, 0 );
2939         Debug( LDAP_DEBUG_TRACE,
2940             "=> regex_matches: rc: %d %s\n",
2941                 rc, !rc ? "matches" : "no matches", 0 );
2942         return( !rc );
2943 }
2944