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   1 /* acl.c - routines to parse and check acl's */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2005 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 /*
  43  * speed up compares
  44  */
  45 static struct berval
  46         aci_bv_entry            = BER_BVC("entry"),
  47         aci_bv_children         = BER_BVC("children"),
  48         aci_bv_onelevel         = BER_BVC("onelevel"),
  49         aci_bv_subtree          = BER_BVC("subtree"),
  50         aci_bv_br_entry         = BER_BVC("[entry]"),
  51         aci_bv_br_all           = BER_BVC("[all]"),
  52         aci_bv_access_id        = BER_BVC("access-id"),
  53 #if 0
  54         aci_bv_anonymous        = BER_BVC("anonymous"),
  55 #endif
  56         aci_bv_public           = BER_BVC("public"),
  57         aci_bv_users            = BER_BVC("users"),
  58         aci_bv_self             = BER_BVC("self"),
  59         aci_bv_dnattr           = BER_BVC("dnattr"),
  60         aci_bv_group            = BER_BVC("group"),
  61         aci_bv_role             = BER_BVC("role"),
  62         aci_bv_set              = BER_BVC("set"),
  63         aci_bv_set_ref          = BER_BVC("set-ref"),
  64         aci_bv_grant            = BER_BVC("grant"),
  65         aci_bv_deny             = BER_BVC("deny"),
  66
  67         aci_bv_ip_eq            = BER_BVC("IP="),
  68 #ifdef LDAP_PF_LOCAL
  69         aci_bv_path_eq          = BER_BVC("PATH="),
  70 #if 0
  71         aci_bv_dirsep           = BER_BVC(LDAP_DIRSEP),
  72 #endif
  73 #endif /* LDAP_PF_LOCAL */
  74
  75         aci_bv_group_class      = BER_BVC(SLAPD_GROUP_CLASS),
  76         aci_bv_group_attr       = BER_BVC(SLAPD_GROUP_ATTR),
  77         aci_bv_role_class       = BER_BVC(SLAPD_ROLE_CLASS),
  78         aci_bv_role_attr        = BER_BVC(SLAPD_ROLE_ATTR),
  79         aci_bv_set_attr         = BER_BVC(SLAPD_ACI_SET_ATTR);
  80
  81 typedef enum slap_aci_scope_t {
  82         SLAP_ACI_SCOPE_ENTRY            = 0x1,
  83         SLAP_ACI_SCOPE_CHILDREN         = 0x2,
  84         SLAP_ACI_SCOPE_SUBTREE          = ( SLAP_ACI_SCOPE_ENTRY | SLAP_ACI_SCOPE_CHILDREN )
  85 } slap_aci_scope_t;
  86
  87 static AccessControl * slap_acl_get(
  88         AccessControl *ac, int *count,
  89         Operation *op, Entry *e,
  90         AttributeDescription *desc,
  91         struct berval *val,
  92         int nmatch, regmatch_t *matches,
  93         AccessControlState *state );
  94
  95 static slap_control_t slap_acl_mask(
  96         AccessControl *ac, slap_mask_t *mask,
  97         Operation *op, Entry *e,
  98         AttributeDescription *desc,
  99         struct berval *val,
 100         int nmatch,
 101         regmatch_t *matches,
 102         int count,
 103         AccessControlState *state );
 104
 105 #ifdef SLAPD_ACI_ENABLED
 106 static int aci_mask(
 107         Operation *op, Entry *e,
 108         AttributeDescription *desc,
 109         struct berval *val,
 110         struct berval *aci,
 111         int nmatch,
 112         regmatch_t *matches,
 113         slap_access_t *grant,
 114         slap_access_t *deny,
 115         slap_aci_scope_t scope);
 116 #endif /* SLAPD_ACI_ENABLED */
 117
 118 static int      regex_matches(
 119         struct berval *pat, char *str, char *buf,
 120         int nmatch, regmatch_t *matches);
 121 static int      string_expand(
 122         struct berval *newbuf, struct berval *pattern,
 123         char *match, int nmatch, regmatch_t *matches);
 124
 125 typedef struct AciSetCookie {
 126         Operation *op;
 127         Entry *e;
 128 } AciSetCookie;
 129
 130 SLAP_SET_GATHER aci_set_gather;
 131 SLAP_SET_GATHER aci_set_gather2;
 132 static int aci_match_set ( struct berval *subj, Operation *op,
 133     Entry *e, int setref );
 134
 135 /*
 136  * access_allowed - check whether op->o_ndn is allowed the requested access
 137  * to entry e, attribute attr, value val.  if val is null, access to
 138  * the whole attribute is assumed (all values).
 139  *
 140  * This routine loops through all access controls and calls
 141  * slap_acl_mask() on each applicable access control.
 142  * The loop exits when a definitive answer is reached or
 143  * or no more controls remain.
 144  *
 145  * returns:
 146  *              0       access denied
 147  *              1       access granted
 148  *
 149  * Notes:
 150  * - can be legally called with op == NULL
 151  * - can be legally called with op->o_bd == NULL
 152  */
 153
 154 #ifdef SLAP_OVERLAY_ACCESS
 155 int
 156 slap_access_always_allowed(
 157         Operation               *op,
 158         Entry                   *e,
 159         AttributeDescription    *desc,
 160         struct berval           *val,
 161         slap_access_t           access,
 162         AccessControlState      *state,
 163         slap_mask_t             *maskp )
 164 {
 165         assert( maskp != NULL );
 166
 167         ACL_PRIV_SET( *maskp, ACL_ACCESS2PRIV( access ) );
 168
 169         return 1;
 170 }
 171
 172 int
 173 slap_access_allowed(
 174         Operation               *op,
 175         Entry                   *e,
 176         AttributeDescription    *desc,
 177         struct berval           *val,
 178         slap_access_t           access,
 179         AccessControlState      *state,
 180         slap_mask_t             *maskp )
 181 {
 182         int                             ret = 1;
 183         int                             count;
 184         AccessControl                   *a = NULL;
 185
 186 #ifdef LDAP_DEBUG
 187         char                            accessmaskbuf[ACCESSMASK_MAXLEN];
 188 #endif
 189         slap_mask_t                     mask;
 190         slap_control_t                  control;
 191         slap_access_t                   access_level;
 192         const char                      *attr;
 193         regmatch_t                      matches[MAXREMATCHES];
 194         int                             st_same_attr = 0;
 195
 196         assert( op != NULL );
 197         assert( e != NULL );
 198         assert( desc != NULL );
 199         assert( maskp != NULL );
 200
 201         access_level = ACL_LEVEL( access );
 202         attr = desc->ad_cname.bv_val;
 203
 204         assert( attr != NULL );
 205
 206         /* grant database root access */
 207         if ( be_isroot( op ) ) {
 208                 Debug( LDAP_DEBUG_ACL, "<= root access granted\n", 0, 0, 0 );
 209                 mask = ACL_LVL_MANAGE;
 210                 goto done;
 211         }
 212
 213         /*
 214          * no-user-modification operational attributes are ignored
 215          * by ACL_WRITE checking as any found here are not provided
 216          * by the user
 217          */
 218         if ( access_level >= ACL_WRITE && is_at_no_user_mod( desc->ad_type )
 219                 && desc != slap_schema.si_ad_entry
 220                 && desc != slap_schema.si_ad_children )
 221         {
 222                 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
 223                         " %s access granted\n",
 224                         attr, 0, 0 );
 225                 goto done;
 226         }
 227
 228         /* use backend default access if no backend acls */
 229         if ( op->o_bd->be_acl == NULL ) {
 230                 int     i;
 231
 232                 Debug( LDAP_DEBUG_ACL,
 233                         "=> slap_access_allowed: backend default %s "
 234                         "access %s to \"%s\"\n",
 235                         access2str( access ),
 236                         op->o_bd->be_dfltaccess >= access_level ? "granted" : "denied",
 237                         op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" );
 238                 ret = op->o_bd->be_dfltaccess >= access_level;
 239
 240                 mask = ACL_PRIV_LEVEL;
 241                 for ( i = ACL_NONE; i <= op->o_bd->be_dfltaccess; i++ ) {
 242                         ACL_PRIV_SET( mask, ACL_ACCESS2PRIV( i ) );
 243                 }
 244
 245                 goto done;
 246         }
 247
 248         ret = 0;
 249         control = ACL_BREAK;
 250
 251         if ( st_same_attr ) {
 252                 assert( state->as_vd_acl != NULL );
 253
 254                 a = state->as_vd_acl;
 255                 count = state->as_vd_acl_count;
 256                 if ( !ACL_IS_INVALID( state->as_vd_acl_mask ) ) {
 257                         mask = state->as_vd_acl_mask;
 258                         AC_MEMCPY( matches, state->as_vd_acl_matches, sizeof(matches) );
 259                         goto vd_access;
 260                 }
 261
 262         } else {
 263                 if ( state ) state->as_vi_acl = NULL;
 264                 a = NULL;
 265                 ACL_PRIV_ASSIGN( mask, *maskp );
 266                 count = 0;
 267                 memset( matches, '\0', sizeof( matches ) );
 268         }
 269
 270         while ( ( a = slap_acl_get( a, &count, op, e, desc, val,
 271                 MAXREMATCHES, matches, state ) ) != NULL )
 272         {
 273                 int i;
 274
 275                 for ( i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++ ) {
 276                         Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
 277                                 (int)matches[i].rm_so, (int)matches[i].rm_eo );
 278                         if ( matches[i].rm_so <= matches[0].rm_eo ) {
 279                                 int n;
 280                                 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++ ) {
 281                                         Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
 282                                 }
 283                         }
 284                         Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
 285                 }
 286
 287                 if ( state ) {
 288                         if ( state->as_vi_acl == a &&
 289                                 ( state->as_recorded & ACL_STATE_RECORDED_NV ) )
 290                         {
 291                                 Debug( LDAP_DEBUG_ACL,
 292                                         "=> slap_access_allowed: result from state (%s)\n",
 293                                         attr, 0, 0 );
 294                                 ret = state->as_result;
 295                                 goto done;
 296                         } else {
 297                                 Debug( LDAP_DEBUG_ACL,
 298                                         "=> slap_access_allowed: no res from state (%s)\n",
 299                                         attr, 0, 0 );
 300                         }
 301                 }
 302
 303 vd_access:
 304                 control = slap_acl_mask( a, &mask, op,
 305                         e, desc, val, MAXREMATCHES, matches, count, state );
 306
 307                 if ( control != ACL_BREAK ) {
 308                         break;
 309                 }
 310
 311                 memset( matches, '\0', sizeof( matches ) );
 312         }
 313
 314         if ( ACL_IS_INVALID( mask ) ) {
 315                 Debug( LDAP_DEBUG_ACL,
 316                         "=> slap_access_allowed: \"%s\" (%s) invalid!\n",
 317                         e->e_dn, attr, 0 );
 318                 ACL_PRIV_ASSIGN( mask, *maskp );
 319
 320         } else if ( control == ACL_BREAK ) {
 321                 Debug( LDAP_DEBUG_ACL,
 322                         "=> slap_access_allowed: no more rules\n", 0, 0, 0 );
 323
 324                 goto done;
 325         }
 326
 327         ret = ACL_GRANT( mask, access );
 328
 329         Debug( LDAP_DEBUG_ACL,
 330                 "=> slap_access_allowed: %s access %s by %s\n",
 331                 access2str( access ), ret ? "granted" : "denied",
 332                 accessmask2str( mask, accessmaskbuf, 1 ) );
 333
 334 done:
 335         ACL_PRIV_ASSIGN( *maskp, mask );
 336         return ret;
 337 }
 338
 339 int
 340 fe_access_allowed(
 341         Operation               *op,
 342         Entry                   *e,
 343         AttributeDescription    *desc,
 344         struct berval           *val,
 345         slap_access_t           access,
 346         AccessControlState      *state,
 347         slap_mask_t             *maskp )
 348 {
 349         BackendDB               *be_orig;
 350         int                     rc;
 351
 352         /*
 353          * NOTE: control gets here if FIXME
 354          * if an appropriate backend cannot be selected for the operation,
 355          * we assume that the frontend should handle this
 356          * FIXME: should select_backend() take care of this,
 357          * and return frontendDB instead of NULL?  maybe for some value
 358          * of the flags?
 359          */
 360         be_orig = op->o_bd;
 361
 362         op->o_bd = select_backend( &op->o_req_ndn, 0, 0 );
 363         if ( op->o_bd == NULL ) {
 364                 op->o_bd = frontendDB;
 365         }
 366         rc = slap_access_allowed( op, e, desc, val, access, state, maskp );
 367         op->o_bd = be_orig;
 368
 369         return rc;
 370 }
 371
 372 int
 373 access_allowed_mask(
 374         Operation               *op,
 375         Entry                   *e,
 376         AttributeDescription    *desc,
 377         struct berval           *val,
 378         slap_access_t           access,
 379         AccessControlState      *state,
 380         slap_mask_t             *maskp )
 381 {
 382         int                             ret = 1;
 383         AccessControl                   *a = NULL;
 384         int                             be_null = 0;
 385
 386 #ifdef LDAP_DEBUG
 387         char                            accessmaskbuf[ACCESSMASK_MAXLEN];
 388 #endif
 389         slap_mask_t                     mask;
 390         slap_control_t                  control;
 391         slap_access_t                   access_level;
 392         const char                      *attr;
 393         int                             st_same_attr = 0;
 394         static AccessControlState       state_init = ACL_STATE_INIT;
 395
 396         assert( e != NULL );
 397         assert( desc != NULL );
 398
 399         access_level = ACL_LEVEL( access );
 400
 401         assert( access_level > ACL_NONE );
 402
 403         ACL_INIT( mask );
 404         if ( maskp ) ACL_INVALIDATE( *maskp );
 405
 406         attr = desc->ad_cname.bv_val;
 407
 408         assert( attr != NULL );
 409
 410         if ( op && op->o_is_auth_check &&
 411                 ( access_level == ACL_SEARCH || access_level == ACL_READ ) )
 412         {
 413                 access = ACL_AUTH;
 414         }
 415
 416         if ( state ) {
 417                 if ( state->as_vd_ad == desc ) {
 418                         if ( state->as_recorded ) {
 419                                 if ( ( state->as_recorded & ACL_STATE_RECORDED_NV ) &&
 420                                         val == NULL )
 421                                 {
 422                                         return state->as_result;
 423
 424                                 } else if ( ( state->as_recorded & ACL_STATE_RECORDED_VD ) &&
 425                                         val != NULL && state->as_vd_acl == NULL )
 426                                 {
 427                                         return state->as_result;
 428                                 }
 429                         }
 430                         st_same_attr = 1;
 431                 } else {
 432                         *state = state_init;
 433                 }
 434
 435                 state->as_vd_ad = desc;
 436         }
 437
 438         Debug( LDAP_DEBUG_ACL,
 439                 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
 440                 access2str( access ), e->e_dn, attr );
 441
 442         if ( op == NULL ) {
 443                 /* no-op call */
 444                 goto done;
 445         }
 446
 447         if ( op->o_bd == NULL ) {
 448                 op->o_bd = LDAP_STAILQ_FIRST( &backendDB );
 449                 be_null = 1;
 450
 451 #ifdef LDAP_DEVEL
 452                 /*
 453                  * FIXME: experimental; use first backend rules
 454                  * iff there is no global_acl (ITS#3100) */
 455                 if ( frontendDB->be_acl != NULL ) {
 456                         op->o_bd = frontendDB;
 457                 }
 458 #endif /* LDAP_DEVEL */
 459         }
 460         assert( op->o_bd != NULL );
 461
 462         /* this is enforced in backend_add() */
 463         if ( op->o_bd->bd_info->bi_access_allowed ) {
 464                 /* delegate to backend */
 465                 ret = op->o_bd->bd_info->bi_access_allowed( op, e,
 466                                 desc, val, access, state, &mask );
 467
 468         } else {
 469                 BackendDB       *be_orig = op->o_bd;
 470
 471                 /* use default (but pass through frontend
 472                  * for global ACL overlays) */
 473                 op->o_bd = frontendDB;
 474                 ret = frontendDB->bd_info->bi_access_allowed( op, e,
 475                                 desc, val, access, state, &mask );
 476                 op->o_bd = be_orig;
 477         }
 478
 479         if ( !ret ) {
 480                 if ( ACL_IS_INVALID( mask ) ) {
 481                         Debug( LDAP_DEBUG_ACL,
 482                                 "=> access_allowed: \"%s\" (%s) invalid!\n",
 483                                 e->e_dn, attr, 0 );
 484                         ACL_INIT( mask );
 485
 486                 } else if ( control == ACL_BREAK ) {
 487                         Debug( LDAP_DEBUG_ACL,
 488                                 "=> access_allowed: no more rules\n", 0, 0, 0 );
 489
 490                         goto done;
 491                 }
 492
 493                 ret = ACL_GRANT( mask, access );
 494         }
 495
 496         Debug( LDAP_DEBUG_ACL,
 497                 "=> access_allowed: %s access %s by %s\n",
 498                 access2str( access ), ret ? "granted" : "denied",
 499                 accessmask2str( mask, accessmaskbuf, 1 ) );
 500
 501 done:
 502         if ( state != NULL ) {
 503                 /* If not value-dependent, save ACL in case of more attrs */
 504                 if ( !( state->as_recorded & ACL_STATE_RECORDED_VD ) ) {
 505                         state->as_vi_acl = a;
 506                         state->as_result = ret;
 507                 }
 508                 state->as_recorded |= ACL_STATE_RECORDED;
 509         }
 510         if ( be_null ) op->o_bd = NULL;
 511         if ( maskp ) ACL_PRIV_ASSIGN( *maskp, mask );
 512         return ret;
 513 }
 514
 515 #else /* !SLAP_OVERLAY_ACCESS */
 516
 517 int
 518 access_allowed_mask(
 519         Operation               *op,
 520         Entry                   *e,
 521         AttributeDescription    *desc,
 522         struct berval           *val,
 523         slap_access_t           access,
 524         AccessControlState      *state,
 525         slap_mask_t             *maskp )
 526 {
 527         int                             ret = 1;
 528         int                             count;
 529         AccessControl                   *a = NULL;
 530         Backend                         *be;
 531         int                             be_null = 0;
 532
 533 #ifdef LDAP_DEBUG
 534         char                            accessmaskbuf[ACCESSMASK_MAXLEN];
 535 #endif
 536         slap_mask_t                     mask;
 537         slap_control_t                  control;
 538         slap_access_t                   access_level;
 539         const char                      *attr;
 540         regmatch_t                      matches[MAXREMATCHES];
 541         int                             st_same_attr = 0;
 542         static AccessControlState       state_init = ACL_STATE_INIT;
 543
 544         assert( e != NULL );
 545         assert( desc != NULL );
 546
 547         access_level = ACL_LEVEL( access );
 548
 549         assert( access_level > ACL_NONE );
 550         if ( maskp ) ACL_INVALIDATE( *maskp );
 551
 552         attr = desc->ad_cname.bv_val;
 553
 554         assert( attr != NULL );
 555
 556         if ( op && op->o_is_auth_check &&
 557                 ( access_level == ACL_SEARCH || access_level == ACL_READ ) )
 558         {
 559                 access = ACL_AUTH;
 560         }
 561
 562         if ( state ) {
 563                 if ( state->as_vd_ad == desc ) {
 564                         if ( state->as_recorded ) {
 565                                 if ( ( state->as_recorded & ACL_STATE_RECORDED_NV ) &&
 566                                         val == NULL )
 567                                 {
 568                                         return state->as_result;
 569
 570                                 } else if ( ( state->as_recorded & ACL_STATE_RECORDED_VD ) &&
 571                                         val != NULL && state->as_vd_acl == NULL )
 572                                 {
 573                                         return state->as_result;
 574                                 }
 575                         }
 576                         st_same_attr = 1;
 577                 } else {
 578                         *state = state_init;
 579                 }
 580
 581                 state->as_vd_ad=desc;
 582         }
 583
 584         Debug( LDAP_DEBUG_ACL,
 585                 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
 586                 access2str( access ), e->e_dn, attr );
 587
 588         if ( op == NULL ) {
 589                 /* no-op call */
 590                 goto done;
 591         }
 592
 593         be = op->o_bd;
 594         if ( be == NULL ) {
 595                 be = LDAP_STAILQ_FIRST(&backendDB);
 596                 be_null = 1;
 597 #ifdef LDAP_DEVEL
 598                 /*
 599                  * FIXME: experimental; use first backend rules
 600                  * iff there is no global_acl (ITS#3100) */
 601                 if ( frontendDB->be_acl == NULL )
 602 #endif
 603                 {
 604                         op->o_bd = be;
 605                 }
 606         }
 607         assert( be != NULL );
 608
 609         /* grant database root access */
 610         if ( be_isroot( op ) ) {
 611                 Debug( LDAP_DEBUG_ACL, "<= root access granted\n", 0, 0, 0 );
 612                 if ( maskp ) {
 613                         mask = ACL_LVL_MANAGE;
 614                 }
 615
 616                 goto done;
 617         }
 618
 619         /*
 620          * no-user-modification operational attributes are ignored
 621          * by ACL_WRITE checking as any found here are not provided
 622          * by the user
 623          */
 624         if ( access_level >= ACL_WRITE && is_at_no_user_mod( desc->ad_type )
 625                 && desc != slap_schema.si_ad_entry
 626                 && desc != slap_schema.si_ad_children )
 627         {
 628                 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
 629                         " %s access granted\n",
 630                         attr, 0, 0 );
 631                 goto done;
 632         }
 633
 634         /* use backend default access if no backend acls */
 635         if ( be->be_acl == NULL ) {
 636                 Debug( LDAP_DEBUG_ACL,
 637                         "=> access_allowed: backend default %s "
 638                         "access %s to \"%s\"\n",
 639                         access2str( access ),
 640                         be->be_dfltaccess >= access_level ? "granted" : "denied",
 641                         op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" );
 642                 ret = be->be_dfltaccess >= access_level;
 643
 644                 if ( maskp ) {
 645                         int     i;
 646
 647                         mask = ACL_PRIV_LEVEL;
 648                         for ( i = ACL_NONE; i <= be->be_dfltaccess; i++ ) {
 649                                 mask |= ACL_ACCESS2PRIV( i );
 650                         }
 651                 }
 652
 653                 goto done;
 654
 655 #ifdef notdef
 656         /* be is always non-NULL */
 657         /* use global default access if no global acls */
 658         } else if ( be == NULL && frontendDB->be_acl == NULL ) {
 659                 Debug( LDAP_DEBUG_ACL,
 660                         "=> access_allowed: global default %s access %s to \"%s\"\n",
 661                         access2str( access ),
 662                         frontendDB->be_dfltaccess >= access_level ?
 663                                 "granted" : "denied", op->o_dn.bv_val );
 664                 ret = frontendDB->be_dfltaccess >= access_level;
 665
 666                 if ( maskp ) {
 667                         int     i;
 668
 669                         mask = ACL_PRIV_LEVEL;
 670                         for ( i = ACL_NONE; i <= global_default_access; i++ ) {
 671                                 mask |= ACL_ACCESS2PRIV( i );
 672                         }
 673                 }
 674
 675                 goto done;
 676 #endif
 677         }
 678
 679         ret = 0;
 680         control = ACL_BREAK;
 681
 682         if ( st_same_attr ) {
 683                 assert( state->as_vd_acl != NULL );
 684
 685                 a = state->as_vd_acl;
 686                 count = state->as_vd_acl_count;
 687                 if ( !ACL_IS_INVALID( state->as_vd_acl_mask ) ) {
 688                         mask = state->as_vd_acl_mask;
 689                         AC_MEMCPY( matches, state->as_vd_acl_matches, sizeof(matches) );
 690                         goto vd_access;
 691                 }
 692
 693         } else {
 694                 if ( state ) state->as_vi_acl = NULL;
 695                 a = NULL;
 696                 ACL_INIT(mask);
 697                 count = 0;
 698                 memset( matches, '\0', sizeof(matches) );
 699         }
 700
 701         while ( ( a = slap_acl_get( a, &count, op, e, desc, val,
 702                 MAXREMATCHES, matches, state ) ) != NULL )
 703         {
 704                 int i;
 705
 706                 for ( i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++ ) {
 707                         Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
 708                                 (int)matches[i].rm_so, (int)matches[i].rm_eo );
 709                         if ( matches[i].rm_so <= matches[0].rm_eo ) {
 710                                 int n;
 711                                 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++ ) {
 712                                         Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
 713                                 }
 714                         }
 715                         Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
 716                 }
 717
 718                 if ( state ) {
 719                         if ( state->as_vi_acl == a &&
 720                                 ( state->as_recorded & ACL_STATE_RECORDED_NV ) )
 721                         {
 722                                 Debug( LDAP_DEBUG_ACL,
 723                                         "access_allowed: result from state (%s)\n",
 724                                         attr, 0, 0 );
 725                                 ret = state->as_result;
 726                                 goto done;
 727                         } else {
 728                                 Debug( LDAP_DEBUG_ACL,
 729                                         "access_allowed: no res from state (%s)\n",
 730                                         attr, 0, 0 );
 731                         }
 732                 }
 733
 734 vd_access:
 735                 control = slap_acl_mask( a, &mask, op,
 736                         e, desc, val, MAXREMATCHES, matches, count, state );
 737
 738                 if ( control != ACL_BREAK ) {
 739                         break;
 740                 }
 741
 742                 memset( matches, '\0', sizeof(matches) );
 743         }
 744
 745         if ( ACL_IS_INVALID( mask ) ) {
 746                 Debug( LDAP_DEBUG_ACL,
 747                         "=> access_allowed: \"%s\" (%s) invalid!\n",
 748                         e->e_dn, attr, 0 );
 749                 ACL_INIT(mask);
 750
 751         } else if ( control == ACL_BREAK ) {
 752                 Debug( LDAP_DEBUG_ACL,
 753                         "=> access_allowed: no more rules\n", 0, 0, 0 );
 754
 755                 goto done;
 756         }
 757
 758         Debug( LDAP_DEBUG_ACL,
 759                 "=> access_allowed: %s access %s by %s\n",
 760                 access2str( access ),
 761                 ACL_GRANT(mask, access) ? "granted" : "denied",
 762                 accessmask2str( mask, accessmaskbuf, 1 ) );
 763
 764         ret = ACL_GRANT(mask, access);
 765
 766 done:
 767         if ( state != NULL ) {
 768                 /* If not value-dependent, save ACL in case of more attrs */
 769                 if ( !( state->as_recorded & ACL_STATE_RECORDED_VD ) ) {
 770                         state->as_vi_acl = a;
 771                         state->as_result = ret;
 772                 }
 773                 state->as_recorded |= ACL_STATE_RECORDED;
 774         }
 775         if ( be_null ) op->o_bd = NULL;
 776         if ( maskp ) *maskp = mask;
 777         return ret;
 778 }
 779
 780 #endif /* SLAP_OVERLAY_ACCESS */
 781
 782 /*
 783  * slap_acl_get - return the acl applicable to entry e, attribute
 784  * attr.  the acl returned is suitable for use in subsequent calls to
 785  * acl_access_allowed().
 786  */
 787
 788 static AccessControl *
 789 slap_acl_get(
 790         AccessControl *a,
 791         int                     *count,
 792         Operation       *op,
 793         Entry           *e,
 794         AttributeDescription *desc,
 795         struct berval   *val,
 796         int                     nmatch,
 797         regmatch_t      *matches,
 798         AccessControlState *state )
 799 {
 800         const char *attr;
 801         int dnlen, patlen;
 802         AccessControl *prev;
 803
 804         assert( e != NULL );
 805         assert( count != NULL );
 806         assert( desc != NULL );
 807
 808         attr = desc->ad_cname.bv_val;
 809
 810         assert( attr != NULL );
 811
 812         if( a == NULL ) {
 813                 if( op->o_bd == NULL ) {
 814                         a = frontendDB->be_acl;
 815                 } else {
 816                         a = op->o_bd->be_acl;
 817                 }
 818                 prev = NULL;
 819
 820                 assert( a != NULL );
 821
 822         } else {
 823                 prev = a;
 824                 a = a->acl_next;
 825         }
 826
 827         dnlen = e->e_nname.bv_len;
 828
 829         for ( ; a != NULL; a = a->acl_next ) {
 830                 (*count) ++;
 831
 832                 if ( a->acl_dn_pat.bv_len || ( a->acl_dn_style != ACL_STYLE_REGEX )) {
 833                         if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
 834                                 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
 835                                         *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub );
 836                                 if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
 837                                         continue;
 838
 839                         } else {
 840                                 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
 841                                         *count, a->acl_dn_pat.bv_val, 0 );
 842                                 patlen = a->acl_dn_pat.bv_len;
 843                                 if ( dnlen < patlen )
 844                                         continue;
 845
 846                                 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
 847                                         /* base dn -- entire object DN must match */
 848                                         if ( dnlen != patlen )
 849                                                 continue;
 850
 851                                 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
 852                                         int     rdnlen = -1, sep = 0;
 853
 854                                         if ( dnlen <= patlen )
 855                                                 continue;
 856
 857                                         if ( patlen > 0 ) {
 858                                                 if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 859                                                         continue;
 860                                                 sep = 1;
 861                                         }
 862
 863                                         rdnlen = dn_rdnlen( NULL, &e->e_nname );
 864                                         if ( rdnlen != dnlen - patlen - sep )
 865                                                 continue;
 866
 867                                 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
 868                                         if ( dnlen > patlen && !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 869                                                 continue;
 870
 871                                 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
 872                                         if ( dnlen <= patlen )
 873                                                 continue;
 874                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 875                                                 continue;
 876                                 }
 877
 878                                 if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
 879                                         continue;
 880                         }
 881
 882                         Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
 883                                 *count, 0, 0 );
 884                 }
 885
 886                 if ( a->acl_attrs && !ad_inlist( desc, a->acl_attrs ) ) {
 887                         matches[0].rm_so = matches[0].rm_eo = -1;
 888                         continue;
 889                 }
 890
 891                 /* Is this ACL only for a specific value? */
 892                 if ( a->acl_attrval.bv_len ) {
 893                         if ( val == NULL ) {
 894                                 continue;
 895                         }
 896
 897                         if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) {
 898                                 state->as_recorded |= ACL_STATE_RECORDED_VD;
 899                                 state->as_vd_acl = a;
 900                                 state->as_vd_acl_count = *count;
 901                                 state->as_vd_access = a->acl_access;
 902                                 state->as_vd_access_count = 1;
 903                                 ACL_INVALIDATE( state->as_vd_acl_mask );
 904                         }
 905
 906                         if ( a->acl_attrval_style == ACL_STYLE_REGEX ) {
 907                                 Debug( LDAP_DEBUG_ACL,
 908                                         "acl_get: valpat %s\n",
 909                                         a->acl_attrval.bv_val, 0, 0 );
 910                                 if ( regexec( &a->acl_attrval_re, val->bv_val, 0, NULL, 0 ) )
 911                                 {
 912                                         continue;
 913                                 }
 914
 915                         } else {
 916                                 int match = 0;
 917                                 const char *text;
 918                                 Debug( LDAP_DEBUG_ACL,
 919                                         "acl_get: val %s\n",
 920                                         a->acl_attrval.bv_val, 0, 0 );
 921
 922                                 if ( a->acl_attrs[0].an_desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName ) {
 923                                         if (value_match( &match, desc,
 924                                                 /* desc->ad_type->sat_equality */ a->acl_attrval_mr, 0,
 925                                                 val, &a->acl_attrval, &text ) != LDAP_SUCCESS ||
 926                                                         match )
 927                                                 continue;
 928
 929                                 } else {
 930                                         int             patlen, vdnlen;
 931
 932                                         patlen = a->acl_attrval.bv_len;
 933                                         vdnlen = val->bv_len;
 934
 935                                         if ( vdnlen < patlen )
 936                                                 continue;
 937
 938                                         if ( a->acl_attrval_style == ACL_STYLE_BASE ) {
 939                                                 if ( vdnlen > patlen )
 940                                                         continue;
 941
 942                                         } else if ( a->acl_attrval_style == ACL_STYLE_ONE ) {
 943                                                 int rdnlen = -1;
 944
 945                                                 if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
 946                                                         continue;
 947
 948                                                 rdnlen = dn_rdnlen( NULL, val );
 949                                                 if ( rdnlen != vdnlen - patlen - 1 )
 950                                                         continue;
 951
 952                                         } else if ( a->acl_attrval_style == ACL_STYLE_SUBTREE ) {
 953                                                 if ( vdnlen > patlen && !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
 954                                                         continue;
 955
 956                                         } else if ( a->acl_attrval_style == ACL_STYLE_CHILDREN ) {
 957                                                 if ( vdnlen <= patlen )
 958                                                         continue;
 959
 960                                                 if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) )
 961                                                         continue;
 962                                         }
 963
 964                                         if ( strcmp( a->acl_attrval.bv_val, val->bv_val + vdnlen - patlen ))
 965                                                 continue;
 966                                 }
 967                         }
 968                 }
 969
 970                 if ( a->acl_filter != NULL ) {
 971                         ber_int_t rc = test_filter( NULL, e, a->acl_filter );
 972                         if ( rc != LDAP_COMPARE_TRUE ) {
 973                                 continue;
 974                         }
 975                 }
 976
 977                 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] attr %s\n",
 978                        *count, attr, 0);
 979                 return a;
 980         }
 981
 982         Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
 983         return( NULL );
 984 }
 985
 986 static int
 987 acl_mask_dn(
 988         Operation               *op,
 989         Entry                   *e,
 990         AccessControl           *a,
 991         int                     nmatch,
 992         regmatch_t              *matches,
 993         slap_dn_access          *b,
 994         struct berval           *opndn )
 995 {
 996         /*
 997          * if access applies to the entry itself, and the
 998          * user is bound as somebody in the same namespace as
 999          * the entry, OR the given dn matches the dn pattern
1000          */
1001         /*
1002          * NOTE: styles "anonymous", "users" and "self"
1003          * have been moved to enum slap_style_t, whose
1004          * value is set in a_dn_style; however, the string
1005          * is maintaned in a_dn_pat.
1006          */
1007         if ( b->a_style == ACL_STYLE_ANONYMOUS ) {
1008                 if ( !BER_BVISEMPTY( opndn ) ) {
1009                         return 1;
1010                 }
1011
1012         } else if ( b->a_style == ACL_STYLE_USERS ) {
1013                 if ( BER_BVISEMPTY( opndn ) ) {
1014                         return 1;
1015                 }
1016
1017         } else if ( b->a_style == ACL_STYLE_SELF ) {
1018                 struct berval   ndn, selfndn;
1019                 int             level;
1020
1021                 if ( BER_BVISEMPTY( opndn ) || BER_BVISNULL( &e->e_nname ) ) {
1022                         return 1;
1023                 }
1024
1025                 level = b->a_self_level;
1026                 if ( level < 0 ) {
1027                         selfndn = *opndn;
1028                         ndn = e->e_nname;
1029                         level = -level;
1030
1031                 } else {
1032                         ndn = *opndn;
1033                         selfndn = e->e_nname;
1034                 }
1035
1036                 for ( ; level > 0; level-- ) {
1037                         if ( BER_BVISEMPTY( &ndn ) ) {
1038                                 break;
1039                         }
1040                         dnParent( &ndn, &ndn );
1041                 }
1042
1043                 if ( BER_BVISEMPTY( &ndn ) || !dn_match( &ndn, &selfndn ) )
1044                 {
1045                         return 1;
1046                 }
1047
1048         } else if ( b->a_style == ACL_STYLE_REGEX ) {
1049                 if ( !ber_bvccmp( &b->a_pat, '*' ) ) {
1050                         int             tmp_nmatch;
1051                         regmatch_t      tmp_matches[2],
1052                                         *tmp_matchesp = tmp_matches;
1053
1054                         int             rc = 0;
1055
1056                         switch ( a->acl_dn_style ) {
1057                         case ACL_STYLE_REGEX:
1058                                 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1059                                         tmp_matchesp = matches;
1060                                         tmp_nmatch = nmatch;
1061                                         break;
1062                                 }
1063                         /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1064
1065                         case ACL_STYLE_BASE:
1066                                 tmp_matches[0].rm_so = 0;
1067                                 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1068                                 tmp_nmatch = 1;
1069                                 break;
1070
1071                         case ACL_STYLE_ONE:
1072                         case ACL_STYLE_SUBTREE:
1073                         case ACL_STYLE_CHILDREN:
1074                                 tmp_matches[0].rm_so = 0;
1075                                 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1076                                 tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1077                                 tmp_matches[1].rm_eo = e->e_nname.bv_len;
1078                                 tmp_nmatch = 2;
1079                                 break;
1080
1081                         default:
1082                                 /* error */
1083                                 rc = 1;
1084                                 break;
1085                         }
1086
1087                         if ( rc ) {
1088                                 return 1;
1089                         }
1090
1091                         if ( !regex_matches( &b->a_pat, opndn->bv_val,
1092                                 e->e_ndn, tmp_nmatch, tmp_matchesp ) )
1093                         {
1094                                 return 1;
1095                         }
1096                 }
1097
1098         } else {
1099                 struct berval   pat;
1100                 ber_len_t       patlen, odnlen;
1101                 int             got_match = 0;
1102
1103                 if ( e->e_dn == NULL )
1104                         return 1;
1105
1106                 if ( b->a_expand ) {
1107                         struct berval   bv;
1108                         char            buf[ACL_BUF_SIZE];
1109
1110                         int             tmp_nmatch;
1111                         regmatch_t      tmp_matches[2],
1112                                         *tmp_matchesp = tmp_matches;
1113
1114                         int             rc = 0;
1115
1116                         bv.bv_len = sizeof( buf ) - 1;
1117                         bv.bv_val = buf;
1118
1119                         switch ( a->acl_dn_style ) {
1120                         case ACL_STYLE_REGEX:
1121                                 if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1122                                         tmp_matchesp = matches;
1123                                         tmp_nmatch = nmatch;
1124                                         break;
1125                                 }
1126                         /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1127
1128                         case ACL_STYLE_BASE:
1129                                 tmp_matches[0].rm_so = 0;
1130                                 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1131                                 tmp_nmatch = 1;
1132                                 break;
1133
1134                         case ACL_STYLE_ONE:
1135                         case ACL_STYLE_SUBTREE:
1136                         case ACL_STYLE_CHILDREN:
1137                                 tmp_matches[0].rm_so = 0;
1138                                 tmp_matches[0].rm_eo = e->e_nname.bv_len;
1139                                 tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1140                                 tmp_matches[1].rm_eo = e->e_nname.bv_len;
1141                                 tmp_nmatch = 2;
1142                                 break;
1143
1144                         default:
1145                                 /* error */
1146                                 rc = 1;
1147                                 break;
1148                         }
1149
1150                         if ( rc ) {
1151                                 return 1;
1152                         }
1153
1154                         if ( string_expand( &bv, &b->a_pat,
1155                                         e->e_nname.bv_val,
1156                                         tmp_nmatch, tmp_matchesp ) )
1157                         {
1158                                 return 1;
1159                         }
1160
1161                         if ( dnNormalize(0, NULL, NULL, &bv,
1162                                         &pat, op->o_tmpmemctx )
1163                                         != LDAP_SUCCESS )
1164                         {
1165                                 /* did not expand to a valid dn */
1166                                 return 1;
1167                         }
1168
1169                 } else {
1170                         pat = b->a_pat;
1171                 }
1172
1173                 patlen = pat.bv_len;
1174                 odnlen = opndn->bv_len;
1175                 if ( odnlen < patlen ) {
1176                         goto dn_match_cleanup;
1177
1178                 }
1179
1180                 if ( b->a_style == ACL_STYLE_BASE ) {
1181                         /* base dn -- entire object DN must match */
1182                         if ( odnlen != patlen ) {
1183                                 goto dn_match_cleanup;
1184                         }
1185
1186                 } else if ( b->a_style == ACL_STYLE_ONE ) {
1187                         int rdnlen = -1;
1188
1189                         if ( odnlen <= patlen ) {
1190                                 goto dn_match_cleanup;
1191                         }
1192
1193                         if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
1194                                 goto dn_match_cleanup;
1195                         }
1196
1197                         rdnlen = dn_rdnlen( NULL, opndn );
1198                         if ( rdnlen != odnlen - patlen - 1 ) {
1199                                 goto dn_match_cleanup;
1200                         }
1201
1202                 } else if ( b->a_style == ACL_STYLE_SUBTREE ) {
1203                         if ( odnlen > patlen && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
1204                                 goto dn_match_cleanup;
1205                         }
1206
1207                 } else if ( b->a_style == ACL_STYLE_CHILDREN ) {
1208                         if ( odnlen <= patlen ) {
1209                                 goto dn_match_cleanup;
1210                         }
1211
1212                         if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) {
1213                                 goto dn_match_cleanup;
1214                         }
1215
1216                 } else if ( b->a_style == ACL_STYLE_LEVEL ) {
1217                         int level;
1218                         struct berval ndn;
1219
1220                         if ( odnlen <= patlen ) {
1221                                 goto dn_match_cleanup;
1222                         }
1223
1224                         if ( level > 0 && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) )
1225                         {
1226                                 goto dn_match_cleanup;
1227                         }
1228
1229                         level = b->a_level;
1230                         ndn = *opndn;
1231                         for ( ; level > 0; level-- ) {
1232                                 if ( BER_BVISEMPTY( &ndn ) ) {
1233                                         goto dn_match_cleanup;
1234                                 }
1235                                 dnParent( &ndn, &ndn );
1236                                 if ( ndn.bv_len < patlen ) {
1237                                         goto dn_match_cleanup;
1238                                 }
1239                         }
1240
1241                         if ( ndn.bv_len != patlen ) {
1242                                 goto dn_match_cleanup;
1243                         }
1244                 }
1245
1246                 got_match = !strcmp( pat.bv_val, &opndn->bv_val[ odnlen - patlen ] );
1247
1248 dn_match_cleanup:;
1249                 if ( pat.bv_val != b->a_pat.bv_val ) {
1250                         slap_sl_free( pat.bv_val, op->o_tmpmemctx );
1251                 }
1252
1253                 if ( !got_match ) {
1254                         return 1;
1255                 }
1256         }
1257
1258         return 0;
1259 }
1260
1261 /*
1262  * Record value-dependent access control state
1263  */
1264 #define ACL_RECORD_VALUE_STATE do { \
1265                 if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) { \
1266                         state->as_recorded |= ACL_STATE_RECORDED_VD; \
1267                         state->as_vd_acl = a; \
1268                         AC_MEMCPY( state->as_vd_acl_matches, matches, \
1269                                 sizeof( state->as_vd_acl_matches )) ; \
1270                         state->as_vd_acl_count = count; \
1271                         state->as_vd_access = b; \
1272                         state->as_vd_access_count = i; \
1273                 } \
1274         } while( 0 )
1275
1276 static int
1277 acl_mask_dnattr(
1278         Operation               *op,
1279         Entry                   *e,
1280         struct berval           *val,
1281         AccessControl           *a,
1282         Access                  *b,
1283         int                     i,
1284         regmatch_t              *matches,
1285         int                     count,
1286         AccessControlState      *state,
1287         slap_dn_access          *bdn,
1288         struct berval           *opndn )
1289 {
1290         Attribute       *at;
1291         struct berval   bv;
1292         int             rc, match = 0;
1293         const char      *text;
1294         const char      *attr = bdn->a_at->ad_cname.bv_val;
1295
1296         assert( attr != NULL );
1297
1298         if ( BER_BVISEMPTY( opndn ) ) {
1299                 return 1;
1300         }
1301
1302         Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n", attr, 0, 0 );
1303         bv = *opndn;
1304
1305         /* see if asker is listed in dnattr */
1306         for ( at = attrs_find( e->e_attrs, bdn->a_at );
1307                 at != NULL;
1308                 at = attrs_find( at->a_next, bdn->a_at ) )
1309         {
1310                 if ( value_find_ex( bdn->a_at,
1311                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1312                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1313                         at->a_nvals,
1314                         &bv, op->o_tmpmemctx ) == 0 )
1315                 {
1316                         /* found it */
1317                         match = 1;
1318                         break;
1319                 }
1320         }
1321
1322         if ( match ) {
1323                 /* have a dnattr match. if this is a self clause then
1324                  * the target must also match the op dn.
1325                  */
1326                 if ( bdn->a_self ) {
1327                         /* check if the target is an attribute. */
1328                         if ( val == NULL ) return 1;
1329
1330                         /* target is attribute, check if the attribute value
1331                          * is the op dn.
1332                          */
1333                         rc = value_match( &match, bdn->a_at,
1334                                 bdn->a_at->ad_type->sat_equality, 0,
1335                                 val, &bv, &text );
1336                         /* on match error or no match, fail the ACL clause */
1337                         if ( rc != LDAP_SUCCESS || match != 0 )
1338                                 return 1;
1339                 }
1340
1341         } else {
1342                 /* no dnattr match, check if this is a self clause */
1343                 if ( ! bdn->a_self )
1344                         return 1;
1345
1346                 ACL_RECORD_VALUE_STATE;
1347
1348                 /* this is a self clause, check if the target is an
1349                  * attribute.
1350                  */
1351                 if ( val == NULL )
1352                         return 1;
1353
1354                 /* target is attribute, check if the attribute value
1355                  * is the op dn.
1356                  */
1357                 rc = value_match( &match, bdn->a_at,
1358                         bdn->a_at->ad_type->sat_equality, 0,
1359                         val, &bv, &text );
1360
1361                 /* on match error or no match, fail the ACL clause */
1362                 if ( rc != LDAP_SUCCESS || match != 0 )
1363                         return 1;
1364         }
1365
1366         return 0;
1367 }
1368
1369
1370 /*
1371  * slap_acl_mask - modifies mask based upon the given acl and the
1372  * requested access to entry e, attribute attr, value val.  if val
1373  * is null, access to the whole attribute is assumed (all values).
1374  *
1375  * returns      0       access NOT allowed
1376  *              1       access allowed
1377  */
1378
1379 static slap_control_t
1380 slap_acl_mask(
1381         AccessControl           *a,
1382         slap_mask_t             *mask,
1383         Operation               *op,
1384         Entry                   *e,
1385         AttributeDescription    *desc,
1386         struct berval           *val,
1387         int                     nmatch,
1388         regmatch_t              *matches,
1389         int                     count,
1390         AccessControlState      *state )
1391 {
1392         int             i;
1393         Access  *b;
1394 #ifdef LDAP_DEBUG
1395         char accessmaskbuf[ACCESSMASK_MAXLEN];
1396 #if !defined( SLAP_DYNACL ) && defined( SLAPD_ACI_ENABLED )
1397         char accessmaskbuf1[ACCESSMASK_MAXLEN];
1398 #endif /* !SLAP_DYNACL && SLAPD_ACI_ENABLED */
1399 #endif /* DEBUG */
1400         const char *attr;
1401
1402         assert( a != NULL );
1403         assert( mask != NULL );
1404         assert( desc != NULL );
1405
1406         attr = desc->ad_cname.bv_val;
1407
1408         assert( attr != NULL );
1409
1410         Debug( LDAP_DEBUG_ACL,
1411                 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
1412                 e->e_dn, attr, 0 );
1413
1414         Debug( LDAP_DEBUG_ACL,
1415                 "=> acl_mask: to %s by \"%s\", (%s) \n",
1416                 val ? "value" : "all values",
1417                 op->o_ndn.bv_val ?  op->o_ndn.bv_val : "",
1418                 accessmask2str( *mask, accessmaskbuf, 1 ) );
1419
1420
1421         if( state && ( state->as_recorded & ACL_STATE_RECORDED_VD )
1422                 && state->as_vd_acl == a )
1423         {
1424                 b = state->as_vd_access;
1425                 i = state->as_vd_access_count;
1426
1427         } else {
1428                 b = a->acl_access;
1429                 i = 1;
1430         }
1431
1432         for ( ; b != NULL; b = b->a_next, i++ ) {
1433                 slap_mask_t oldmask, modmask;
1434
1435                 ACL_INVALIDATE( modmask );
1436
1437                 /* AND <who> clauses */
1438                 if ( !BER_BVISEMPTY( &b->a_dn_pat ) ) {
1439                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
1440                                 b->a_dn_pat.bv_val, 0, 0);
1441                         /*
1442                          * if access applies to the entry itself, and the
1443                          * user is bound as somebody in the same namespace as
1444                          * the entry, OR the given dn matches the dn pattern
1445                          */
1446                         /*
1447                          * NOTE: styles "anonymous", "users" and "self"
1448                          * have been moved to enum slap_style_t, whose
1449                          * value is set in a_dn_style; however, the string
1450                          * is maintaned in a_dn_pat.
1451                          */
1452
1453                         if ( acl_mask_dn( op, e, a, nmatch, matches,
1454                                 &b->a_dn, &op->o_ndn ) )
1455                         {
1456                                 continue;
1457                         }
1458                 }
1459
1460                 if ( !BER_BVISEMPTY( &b->a_realdn_pat ) ) {
1461                         struct berval   ndn;
1462
1463                         Debug( LDAP_DEBUG_ACL, "<= check a_realdn_pat: %s\n",
1464                                 b->a_realdn_pat.bv_val, 0, 0);
1465                         /*
1466                          * if access applies to the entry itself, and the
1467                          * user is bound as somebody in the same namespace as
1468                          * the entry, OR the given dn matches the dn pattern
1469                          */
1470                         /*
1471                          * NOTE: styles "anonymous", "users" and "self"
1472                          * have been moved to enum slap_style_t, whose
1473                          * value is set in a_dn_style; however, the string
1474                          * is maintaned in a_dn_pat.
1475                          */
1476
1477                         if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) )
1478                         {
1479                                 ndn = op->o_conn->c_ndn;
1480                         } else {
1481                                 ndn = op->o_ndn;
1482                         }
1483
1484                         if ( acl_mask_dn( op, e, a, nmatch, matches,
1485                                 &b->a_realdn, &ndn ) )
1486                         {
1487                                 continue;
1488                         }
1489                 }
1490
1491                 if ( !BER_BVISEMPTY( &b->a_sockurl_pat ) ) {
1492                         if ( ! op->o_conn->c_listener ) {
1493                                 continue;
1494                         }
1495                         Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
1496                                 b->a_sockurl_pat.bv_val, 0, 0 );
1497
1498                         if ( !ber_bvccmp( &b->a_sockurl_pat, '*' ) ) {
1499                                 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
1500                                         if (!regex_matches( &b->a_sockurl_pat, op->o_conn->c_listener_url.bv_val,
1501                                                         e->e_ndn, nmatch, matches ) )
1502                                         {
1503                                                 continue;
1504                                         }
1505
1506                                 } else if ( b->a_sockurl_style == ACL_STYLE_EXPAND ) {
1507                                         struct berval   bv;
1508                                         char buf[ACL_BUF_SIZE];
1509
1510                                         bv.bv_len = sizeof( buf ) - 1;
1511                                         bv.bv_val = buf;
1512                                         if ( string_expand( &bv, &b->a_sockurl_pat,
1513                                                         e->e_ndn, nmatch, matches ) )
1514                                         {
1515                                                 continue;
1516                                         }
1517
1518                                         if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_listener_url ) != 0 )
1519                                         {
1520                                                 continue;
1521                                         }
1522
1523                                 } else {
1524                                         if ( ber_bvstrcasecmp( &b->a_sockurl_pat, &op->o_conn->c_listener_url ) != 0 )
1525                                         {
1526                                                 continue;
1527                                         }
1528                                 }
1529                         }
1530                 }
1531
1532                 if ( !BER_BVISEMPTY( &b->a_domain_pat ) ) {
1533                         if ( !op->o_conn->c_peer_domain.bv_val ) {
1534                                 continue;
1535                         }
1536                         Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
1537                                 b->a_domain_pat.bv_val, 0, 0 );
1538                         if ( !ber_bvccmp( &b->a_domain_pat, '*' ) ) {
1539                                 if ( b->a_domain_style == ACL_STYLE_REGEX) {
1540                                         if (!regex_matches( &b->a_domain_pat, op->o_conn->c_peer_domain.bv_val,
1541                                                         e->e_ndn, nmatch, matches ) )
1542                                         {
1543                                                 continue;
1544                                         }
1545                                 } else {
1546                                         char buf[ACL_BUF_SIZE];
1547
1548                                         struct berval   cmp = op->o_conn->c_peer_domain;
1549                                         struct berval   pat = b->a_domain_pat;
1550
1551                                         if ( b->a_domain_expand ) {
1552                                                 struct berval bv;
1553
1554                                                 bv.bv_len = sizeof(buf) - 1;
1555                                                 bv.bv_val = buf;
1556
1557                                                 if ( string_expand(&bv, &b->a_domain_pat,
1558                                                                 e->e_ndn, nmatch, matches) )
1559                                                 {
1560                                                         continue;
1561                                                 }
1562                                                 pat = bv;
1563                                         }
1564
1565                                         if ( b->a_domain_style == ACL_STYLE_SUBTREE ) {
1566                                                 int offset = cmp.bv_len - pat.bv_len;
1567                                                 if ( offset < 0 ) {
1568                                                         continue;
1569                                                 }
1570
1571                                                 if ( offset == 1 || ( offset > 1 && cmp.bv_val[ offset - 1 ] != '.' ) ) {
1572                                                         continue;
1573                                                 }
1574
1575                                                 /* trim the domain */
1576                                                 cmp.bv_val = &cmp.bv_val[ offset ];
1577                                                 cmp.bv_len -= offset;
1578                                         }
1579
1580                                         if ( ber_bvstrcasecmp( &pat, &cmp ) != 0 ) {
1581                                                 continue;
1582                                         }
1583                                 }
1584                         }
1585                 }
1586
1587                 if ( !BER_BVISEMPTY( &b->a_peername_pat ) ) {
1588                         if ( !op->o_conn->c_peer_name.bv_val ) {
1589                                 continue;
1590                         }
1591                         Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
1592                                 b->a_peername_pat.bv_val, 0, 0 );
1593                         if ( !ber_bvccmp( &b->a_peername_pat, '*' ) ) {
1594                                 if ( b->a_peername_style == ACL_STYLE_REGEX ) {
1595                                         if (!regex_matches( &b->a_peername_pat, op->o_conn->c_peer_name.bv_val,
1596                                                         e->e_ndn, nmatch, matches ) )
1597                                         {
1598                                                 continue;
1599                                         }
1600
1601                                 } else {
1602                                         /* try exact match */
1603                                         if ( b->a_peername_style == ACL_STYLE_BASE ) {
1604                                                 if ( ber_bvstrcasecmp( &b->a_peername_pat, &op->o_conn->c_peer_name ) != 0 ) {
1605                                                         continue;
1606                                                 }
1607
1608                                         } else if ( b->a_peername_style == ACL_STYLE_EXPAND ) {
1609                                                 struct berval   bv;
1610                                                 char buf[ACL_BUF_SIZE];
1611
1612                                                 bv.bv_len = sizeof( buf ) - 1;
1613                                                 bv.bv_val = buf;
1614                                                 if ( string_expand( &bv, &b->a_peername_pat,
1615                                                                 e->e_ndn, nmatch, matches ) )
1616                                                 {
1617                                                         continue;
1618                                                 }
1619
1620                                                 if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_peer_name ) != 0 ) {
1621                                                         continue;
1622                                                 }
1623
1624                                         /* extract IP and try exact match */
1625                                         } else if ( b->a_peername_style == ACL_STYLE_IP ) {
1626                                                 char            *port;
1627                                                 char            buf[] = "255.255.255.255";
1628                                                 struct berval   ip;
1629                                                 unsigned long   addr;
1630                                                 int             port_number = -1;
1631
1632                                                 if ( strncasecmp( op->o_conn->c_peer_name.bv_val,
1633                                                                         aci_bv_ip_eq.bv_val, aci_bv_ip_eq.bv_len ) != 0 )
1634                                                         continue;
1635
1636                                                 ip.bv_val = op->o_conn->c_peer_name.bv_val + aci_bv_ip_eq.bv_len;
1637                                                 ip.bv_len = op->o_conn->c_peer_name.bv_len - aci_bv_ip_eq.bv_len;
1638
1639                                                 port = strrchr( ip.bv_val, ':' );
1640                                                 if ( port ) {
1641                                                         char    *next;
1642
1643                                                         ip.bv_len = port - ip.bv_val;
1644                                                         ++port;
1645                                                         port_number = strtol( port, &next, 10 );
1646                                                         if ( next[0] != '\0' )
1647                                                                 continue;
1648                                                 }
1649
1650                                                 /* the port check can be anticipated here */
1651                                                 if ( b->a_peername_port != -1 && port_number != b->a_peername_port )
1652                                                         continue;
1653
1654                                                 /* address longer than expected? */
1655                                                 if ( ip.bv_len >= sizeof(buf) )
1656                                                         continue;
1657
1658                                                 AC_MEMCPY( buf, ip.bv_val, ip.bv_len );
1659                                                 buf[ ip.bv_len ] = '\0';
1660
1661                                                 addr = inet_addr( buf );
1662
1663                                                 /* unable to convert? */
1664                                                 if ( addr == (unsigned long)(-1) )
1665                                                         continue;
1666
1667                                                 if ( (addr & b->a_peername_mask) != b->a_peername_addr )
1668                                                         continue;
1669
1670 #ifdef LDAP_PF_LOCAL
1671                                         /* extract path and try exact match */
1672                                         } else if ( b->a_peername_style == ACL_STYLE_PATH ) {
1673                                                 struct berval path;
1674
1675                                                 if ( strncmp( op->o_conn->c_peer_name.bv_val,
1676                                                                         aci_bv_path_eq.bv_val, aci_bv_path_eq.bv_len ) != 0 )
1677                                                         continue;
1678
1679                                                 path.bv_val = op->o_conn->c_peer_name.bv_val + aci_bv_path_eq.bv_len;
1680                                                 path.bv_len = op->o_conn->c_peer_name.bv_len - aci_bv_path_eq.bv_len;
1681
1682                                                 if ( ber_bvcmp( &b->a_peername_pat, &path ) != 0 )
1683                                                         continue;
1684
1685 #endif /* LDAP_PF_LOCAL */
1686
1687                                         /* exact match (very unlikely...) */
1688                                         } else if ( ber_bvcmp( &op->o_conn->c_peer_name, &b->a_peername_pat ) != 0 ) {
1689                                                         continue;
1690                                         }
1691                                 }
1692                         }
1693                 }
1694
1695                 if ( !BER_BVISEMPTY( &b->a_sockname_pat ) ) {
1696                         if ( BER_BVISNULL( &op->o_conn->c_sock_name ) ) {
1697                                 continue;
1698                         }
1699                         Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
1700                                 b->a_sockname_pat.bv_val, 0, 0 );
1701                         if ( !ber_bvccmp( &b->a_sockname_pat, '*' ) ) {
1702                                 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
1703                                         if (!regex_matches( &b->a_sockname_pat, op->o_conn->c_sock_name.bv_val,
1704                                                         e->e_ndn, nmatch, matches ) )
1705                                         {
1706                                                 continue;
1707                                         }
1708
1709                                 } else if ( b->a_sockname_style == ACL_STYLE_EXPAND ) {
1710                                         struct berval   bv;
1711                                         char buf[ACL_BUF_SIZE];
1712
1713                                         bv.bv_len = sizeof( buf ) - 1;
1714                                         bv.bv_val = buf;
1715                                         if ( string_expand( &bv, &b->a_sockname_pat,
1716                                                         e->e_ndn, nmatch, matches ) )
1717                                         {
1718                                                 continue;
1719                                         }
1720
1721                                         if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_sock_name ) != 0 ) {
1722                                                 continue;
1723                                         }
1724
1725                                 } else {
1726                                         if ( ber_bvstrcasecmp( &b->a_sockname_pat, &op->o_conn->c_sock_name ) != 0 ) {
1727                                                 continue;
1728                                         }
1729                                 }
1730                         }
1731                 }
1732
1733                 if ( b->a_dn_at != NULL ) {
1734                         if ( acl_mask_dnattr( op, e, val, a, b, i,
1735                                         matches, count, state,
1736                                         &b->a_dn, &op->o_ndn ) )
1737                         {
1738                                 continue;
1739                         }
1740                 }
1741
1742                 if ( b->a_realdn_at != NULL ) {
1743                         struct berval   ndn;
1744
1745                         if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) )
1746                         {
1747                                 ndn = op->o_conn->c_ndn;
1748                         } else {
1749                                 ndn = op->o_ndn;
1750                         }
1751
1752                         if ( acl_mask_dnattr( op, e, val, a, b, i,
1753                                         matches, count, state,
1754                                         &b->a_realdn, &ndn ) )
1755                         {
1756                                 continue;
1757                         }
1758                 }
1759
1760                 if ( !BER_BVISEMPTY( &b->a_group_pat ) ) {
1761                         struct berval bv;
1762                         struct berval ndn = BER_BVNULL;
1763                         int rc;
1764
1765                         if ( op->o_ndn.bv_len == 0 ) {
1766                                 continue;
1767                         }
1768
1769                         /* b->a_group is an unexpanded entry name, expanded it should be an
1770                          * entry with objectclass group* and we test to see if odn is one of
1771                          * the values in the attribute group
1772                          */
1773                         /* see if asker is listed in dnattr */
1774                         if ( b->a_group_style == ACL_STYLE_EXPAND ) {
1775                                 char            buf[ACL_BUF_SIZE];
1776                                 int             tmp_nmatch;
1777                                 regmatch_t      tmp_matches[2],
1778                                                 *tmp_matchesp = tmp_matches;
1779
1780                                 bv.bv_len = sizeof(buf) - 1;
1781                                 bv.bv_val = buf;
1782
1783                                 rc = 0;
1784
1785                                 switch ( a->acl_dn_style ) {
1786                                 case ACL_STYLE_REGEX:
1787                                         if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1788                                                 tmp_matchesp = matches;
1789                                                 tmp_nmatch = nmatch;
1790                                                 break;
1791                                         }
1792
1793                                 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1794                                 case ACL_STYLE_BASE:
1795                                         tmp_matches[0].rm_so = 0;
1796                                         tmp_matches[0].rm_eo = e->e_nname.bv_len;
1797                                         tmp_nmatch = 1;
1798                                         break;
1799
1800                                 case ACL_STYLE_ONE:
1801                                 case ACL_STYLE_SUBTREE:
1802                                 case ACL_STYLE_CHILDREN:
1803                                         tmp_matches[0].rm_so = 0;
1804                                         tmp_matches[0].rm_eo = e->e_nname.bv_len;
1805                                         tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1806                                         tmp_matches[1].rm_eo = e->e_nname.bv_len;
1807                                         tmp_nmatch = 2;
1808                                         break;
1809
1810                                 default:
1811                                         /* error */
1812                                         rc = 1;
1813                                         break;
1814                                 }
1815
1816                                 if ( rc ) {
1817                                         continue;
1818                                 }
1819
1820                                 if ( string_expand( &bv, &b->a_group_pat,
1821                                                 e->e_nname.bv_val,
1822                                                 tmp_nmatch, tmp_matchesp ) )
1823                                 {
1824                                         continue;
1825                                 }
1826
1827                                 if ( dnNormalize( 0, NULL, NULL, &bv, &ndn,
1828                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1829                                 {
1830                                         /* did not expand to a valid dn */
1831                                         continue;
1832                                 }
1833
1834                                 bv = ndn;
1835
1836                         } else {
1837                                 bv = b->a_group_pat;
1838                         }
1839
1840                         rc = backend_group( op, e, &bv, &op->o_ndn,
1841                                 b->a_group_oc, b->a_group_at );
1842
1843                         if ( ndn.bv_val ) {
1844                                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
1845                         }
1846
1847                         if ( rc != 0 ) {
1848                                 continue;
1849                         }
1850                 }
1851
1852                 if ( !BER_BVISEMPTY( &b->a_set_pat ) ) {
1853                         struct berval   bv;
1854                         char            buf[ACL_BUF_SIZE];
1855
1856                         if ( b->a_set_style == ACL_STYLE_EXPAND ) {
1857                                 int             tmp_nmatch;
1858                                 regmatch_t      tmp_matches[2],
1859                                                 *tmp_matchesp = tmp_matches;
1860                                 int             rc = 0;
1861
1862                                 bv.bv_len = sizeof( buf ) - 1;
1863                                 bv.bv_val = buf;
1864
1865                                 rc = 0;
1866
1867                                 switch ( a->acl_dn_style ) {
1868                                 case ACL_STYLE_REGEX:
1869                                         if ( !BER_BVISNULL( &a->acl_dn_pat ) ) {
1870                                                 tmp_matchesp = matches;
1871                                                 tmp_nmatch = nmatch;
1872                                                 break;
1873                                         }
1874
1875                                 /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */
1876                                 case ACL_STYLE_BASE:
1877                                         tmp_matches[0].rm_so = 0;
1878                                         tmp_matches[0].rm_eo = e->e_nname.bv_len;
1879                                         tmp_nmatch = 1;
1880                                         break;
1881
1882                                 case ACL_STYLE_ONE:
1883                                 case ACL_STYLE_SUBTREE:
1884                                 case ACL_STYLE_CHILDREN:
1885                                         tmp_matches[0].rm_so = 0;
1886                                         tmp_matches[0].rm_eo = e->e_nname.bv_len;
1887                                         tmp_matches[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len;
1888                                         tmp_matches[1].rm_eo = e->e_nname.bv_len;
1889                                         tmp_nmatch = 2;
1890                                         break;
1891
1892                                 default:
1893                                         /* error */
1894                                         rc = 1;
1895                                         break;
1896                                 }
1897
1898                                 if ( rc ) {
1899                                         continue;
1900                                 }
1901
1902                                 if ( string_expand( &bv, &b->a_set_pat,
1903                                                 e->e_nname.bv_val,
1904                                                 tmp_nmatch, tmp_matchesp ) )
1905                                 {
1906                                         continue;
1907                                 }
1908
1909                         } else {
1910                                 bv = b->a_set_pat;
1911                         }
1912
1913                         if ( aci_match_set( &bv, op, e, 0 ) == 0 ) {
1914                                 continue;
1915                         }
1916                 }
1917
1918                 if ( b->a_authz.sai_ssf ) {
1919                         Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
1920                                 b->a_authz.sai_ssf, op->o_ssf, 0 );
1921                         if ( b->a_authz.sai_ssf >  op->o_ssf ) {
1922                                 continue;
1923                         }
1924                 }
1925
1926                 if ( b->a_authz.sai_transport_ssf ) {
1927                         Debug( LDAP_DEBUG_ACL,
1928                                 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
1929                                 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
1930                         if ( b->a_authz.sai_transport_ssf >  op->o_transport_ssf ) {
1931                                 continue;
1932                         }
1933                 }
1934
1935                 if ( b->a_authz.sai_tls_ssf ) {
1936                         Debug( LDAP_DEBUG_ACL,
1937                                 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
1938                                 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
1939                         if ( b->a_authz.sai_tls_ssf >  op->o_tls_ssf ) {
1940                                 continue;
1941                         }
1942                 }
1943
1944                 if ( b->a_authz.sai_sasl_ssf ) {
1945                         Debug( LDAP_DEBUG_ACL,
1946                                 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
1947                                 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
1948                         if ( b->a_authz.sai_sasl_ssf >  op->o_sasl_ssf ) {
1949                                 continue;
1950                         }
1951                 }
1952
1953 #ifdef SLAP_DYNACL
1954                 if ( b->a_dynacl ) {
1955                         slap_dynacl_t   *da;
1956                         slap_access_t   tgrant, tdeny;
1957
1958                         /* this case works different from the others above.
1959                          * since aci's themselves give permissions, we need
1960                          * to first check b->a_access_mask, the ACL's access level.
1961                          */
1962                         if ( BER_BVISEMPTY( &e->e_nname ) ) {
1963                                 /* no ACIs in the root DSE */
1964                                 continue;
1965                         }
1966
1967                         /* first check if the right being requested
1968                          * is allowed by the ACL clause.
1969                          */
1970                         if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
1971                                 continue;
1972                         }
1973
1974                         /* start out with nothing granted, nothing denied */
1975                         ACL_INIT(tgrant);
1976                         ACL_INIT(tdeny);
1977
1978                         for ( da = b->a_dynacl; da; da = da->da_next ) {
1979                                 slap_access_t   grant, deny;
1980
1981                                 (void)( *da->da_mask )( da->da_private, op, e, desc, val, nmatch, matches, &grant, &deny );
1982
1983                                 tgrant |= grant;
1984                                 tdeny |= deny;
1985                         }
1986
1987                         /* remove anything that the ACL clause does not allow */
1988                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
1989                         tdeny &= ACL_PRIV_MASK;
1990
1991                         /* see if we have anything to contribute */
1992                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
1993                                 continue;
1994                         }
1995
1996                         /* this could be improved by changing slap_acl_mask so that it can deal with
1997                          * by clauses that return grant/deny pairs.  Right now, it does either
1998                          * additive or subtractive rights, but not both at the same time.  So,
1999                          * we need to combine the grant/deny pair into a single rights mask in
2000                          * a smart way:  if either grant or deny is "empty", then we use the
2001                          * opposite as is, otherwise we remove any denied rights from the grant
2002                          * rights mask and construct an additive mask.
2003                          */
2004                         if (ACL_IS_INVALID(tdeny)) {
2005                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
2006
2007                         } else if (ACL_IS_INVALID(tgrant)) {
2008                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
2009
2010                         } else {
2011                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
2012                         }
2013
2014                 } else
2015 #else /* !SLAP_DYNACL */
2016
2017 #ifdef SLAPD_ACI_ENABLED
2018                 if ( b->a_aci_at != NULL ) {
2019                         Attribute       *at;
2020                         slap_access_t   grant, deny, tgrant, tdeny;
2021                         struct berval   parent_ndn;
2022                         BerVarray       bvals = NULL;
2023                         int             ret, stop;
2024
2025                         /* this case works different from the others above.
2026                          * since aci's themselves give permissions, we need
2027                          * to first check b->a_access_mask, the ACL's access level.
2028                          */
2029
2030                         if ( BER_BVISEMPTY( &e->e_nname ) ) {
2031                                 /* no ACIs in the root DSE */
2032                                 continue;
2033                         }
2034
2035                         /* first check if the right being requested
2036                          * is allowed by the ACL clause.
2037                          */
2038                         if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
2039                                 continue;
2040                         }
2041                         /* start out with nothing granted, nothing denied */
2042                         ACL_INIT(tgrant);
2043                         ACL_INIT(tdeny);
2044
2045                         /* get the aci attribute */
2046                         at = attr_find( e->e_attrs, b->a_aci_at );
2047                         if ( at != NULL ) {
2048 #if 0
2049                                 /* FIXME: this breaks acl caching;
2050                                  * see also ACL_RECORD_VALUE_STATE below */
2051                                 ACL_RECORD_VALUE_STATE;
2052 #endif
2053                                 /* the aci is an multi-valued attribute.  The
2054                                 * rights are determined by OR'ing the individual
2055                                 * rights given by the acis.
2056                                 */
2057                                 for ( i = 0; !BER_BVISNULL( &at->a_nvals[i] ); i++ ) {
2058                                         if (aci_mask( op,
2059                                                 e, desc, val,
2060                                                 &at->a_nvals[i],
2061                                                 nmatch, matches,
2062                                                 &grant, &deny, SLAP_ACI_SCOPE_ENTRY ) != 0)
2063                                         {
2064                                                 tgrant |= grant;
2065                                                 tdeny |= deny;
2066                                         }
2067                                 }
2068                                 Debug(LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n",
2069                                           accessmask2str(tgrant, accessmaskbuf, 1),
2070                                           accessmask2str(tdeny, accessmaskbuf1, 1), 0);
2071
2072                         }
2073                         /* If the entry level aci didn't contain anything valid for the
2074                          * current operation, climb up the tree and evaluate the
2075                          * acis with scope set to subtree
2076                          */
2077                         if ( (tgrant == ACL_PRIV_NONE) && (tdeny == ACL_PRIV_NONE) ) {
2078                                 dnParent( &e->e_nname, &parent_ndn );
2079                                 while ( !BER_BVISEMPTY( &parent_ndn ) ) {
2080                                         Debug(LDAP_DEBUG_ACL, "checking ACI of %s\n", parent_ndn.bv_val, 0, 0);
2081                                         ret = backend_attribute(op, NULL, &parent_ndn, b->a_aci_at, &bvals, ACL_AUTH);
2082                                         switch(ret){
2083                                         case LDAP_SUCCESS :
2084                                                 stop = 0;
2085                                                 if (!bvals){
2086                                                         break;
2087                                                 }
2088
2089                                                 for( i = 0; bvals[i].bv_val != NULL; i++){
2090 #if 0
2091                                                         /* FIXME: this breaks acl caching;
2092                                                          * see also ACL_RECORD_VALUE_STATE above */
2093                                                         ACL_RECORD_VALUE_STATE;
2094 #endif
2095                                                         if (aci_mask(op, e, desc, val, &bvals[i],
2096                                                                         nmatch, matches,
2097                                                                         &grant, &deny, SLAP_ACI_SCOPE_CHILDREN ) != 0 )
2098                                                         {
2099                                                                 tgrant |= grant;
2100                                                                 tdeny |= deny;
2101                                                                 /* evaluation stops as soon as either a "deny" or a
2102                                                                  * "grant" directive matches.
2103                                                                  */
2104                                                                 if( (tgrant != ACL_PRIV_NONE) || (tdeny != ACL_PRIV_NONE) ){
2105                                                                         stop = 1;
2106                                                                 }
2107                                                         }
2108                                                         Debug(LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n",
2109                                                                 accessmask2str(tgrant, accessmaskbuf, 1),
2110                                                                 accessmask2str(tdeny, accessmaskbuf1, 1), 0);
2111                                                 }
2112                                                 break;
2113
2114                                         case LDAP_NO_SUCH_ATTRIBUTE:
2115                                                 /* just go on if the aci-Attribute is not present in
2116                                                  * the current entry
2117                                                  */
2118                                                 Debug(LDAP_DEBUG_ACL, "no such attribute\n", 0, 0, 0);
2119                                                 stop = 0;
2120                                                 break;
2121
2122                                         case LDAP_NO_SUCH_OBJECT:
2123                                                 /* We have reached the base object */
2124                                                 Debug(LDAP_DEBUG_ACL, "no such object\n", 0, 0, 0);
2125                                                 stop = 1;
2126                                                 break;
2127
2128                                         default:
2129                                                 stop = 1;
2130                                                 break;
2131                                         }
2132                                         if (stop){
2133                                                 break;
2134                                         }
2135                                         dnParent( &parent_ndn, &parent_ndn );
2136                                 }
2137                         }
2138
2139
2140                         /* remove anything that the ACL clause does not allow */
2141                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
2142                         tdeny &= ACL_PRIV_MASK;
2143
2144                         /* see if we have anything to contribute */
2145                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
2146                                 continue;
2147                         }
2148
2149                         /* this could be improved by changing slap_acl_mask so that it can deal with
2150                          * by clauses that return grant/deny pairs.  Right now, it does either
2151                          * additive or subtractive rights, but not both at the same time.  So,
2152                          * we need to combine the grant/deny pair into a single rights mask in
2153                          * a smart way:  if either grant or deny is "empty", then we use the
2154                          * opposite as is, otherwise we remove any denied rights from the grant
2155                          * rights mask and construct an additive mask.
2156                          */
2157                         if (ACL_IS_INVALID(tdeny)) {
2158                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
2159
2160                         } else if (ACL_IS_INVALID(tgrant)) {
2161                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
2162
2163                         } else {
2164                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
2165                         }
2166
2167                 } else
2168 #endif /* SLAPD_ACI_ENABLED */
2169 #endif /* !SLAP_DYNACL */
2170                 {
2171                         modmask = b->a_access_mask;
2172                 }
2173
2174                 Debug( LDAP_DEBUG_ACL,
2175                         "<= acl_mask: [%d] applying %s (%s)\n",
2176                         i, accessmask2str( modmask, accessmaskbuf, 1 ),
2177                         b->a_type == ACL_CONTINUE
2178                                 ? "continue"
2179                                 : b->a_type == ACL_BREAK
2180                                         ? "break"
2181                                         : "stop" );
2182                 /* save old mask */
2183                 oldmask = *mask;
2184
2185                 if( ACL_IS_ADDITIVE(modmask) ) {
2186                         /* add privs */
2187                         ACL_PRIV_SET( *mask, modmask );
2188
2189                         /* cleanup */
2190                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
2191
2192                 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
2193                         /* substract privs */
2194                         ACL_PRIV_CLR( *mask, modmask );
2195
2196                         /* cleanup */
2197                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
2198
2199                 } else {
2200                         /* assign privs */
2201                         *mask = modmask;
2202                 }
2203
2204                 Debug( LDAP_DEBUG_ACL,
2205                         "<= acl_mask: [%d] mask: %s\n",
2206                         i, accessmask2str(*mask, accessmaskbuf, 1), 0 );
2207
2208                 if( b->a_type == ACL_CONTINUE ) {
2209                         continue;
2210
2211                 } else if ( b->a_type == ACL_BREAK ) {
2212                         return ACL_BREAK;
2213
2214                 } else {
2215                         return ACL_STOP;
2216                 }
2217         }
2218
2219         /* implicit "by * none" clause */
2220         ACL_INIT(*mask);
2221
2222         Debug( LDAP_DEBUG_ACL,
2223                 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
2224                 accessmask2str(*mask, accessmaskbuf, 1), 0, 0 );
2225         return ACL_STOP;
2226 }
2227
2228 /*
2229  * acl_check_modlist - check access control on the given entry to see if
2230  * it allows the given modifications by the user associated with op.
2231  * returns      1       if mods allowed ok
2232  *              0       mods not allowed
2233  */
2234
2235 int
2236 acl_check_modlist(
2237         Operation       *op,
2238         Entry   *e,
2239         Modifications   *mlist
2240 )
2241 {
2242         struct berval *bv;
2243         AccessControlState state = ACL_STATE_INIT;
2244         Backend *be;
2245         int be_null = 0;
2246         int ret = 1; /* default is access allowed */
2247
2248         be = op->o_bd;
2249         if ( be == NULL ) {
2250                 be = LDAP_STAILQ_FIRST(&backendDB);
2251                 be_null = 1;
2252                 op->o_bd = be;
2253         }
2254         assert( be != NULL );
2255
2256         /* short circuit root database access */
2257         if ( be_isroot( op ) ) {
2258                 Debug( LDAP_DEBUG_ACL,
2259                         "<= acl_access_allowed: granted to database root\n",
2260                     0, 0, 0 );
2261                 goto done;
2262         }
2263
2264         /* use backend default access if no backend acls */
2265         if( op->o_bd != NULL && op->o_bd->be_acl == NULL ) {
2266                 Debug( LDAP_DEBUG_ACL,
2267                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
2268                         access2str( ACL_WRITE ),
2269                         op->o_bd->be_dfltaccess >= ACL_WRITE
2270                                 ? "granted" : "denied",
2271                         op->o_dn.bv_val );
2272                 ret = (op->o_bd->be_dfltaccess >= ACL_WRITE);
2273                 goto done;
2274         }
2275
2276         for ( ; mlist != NULL; mlist = mlist->sml_next ) {
2277                 /*
2278                  * Internal mods are ignored by ACL_WRITE checking
2279                  */
2280                 if ( mlist->sml_flags & SLAP_MOD_INTERNAL ) {
2281                         Debug( LDAP_DEBUG_ACL, "acl: internal mod %s:"
2282                                 " modify access granted\n",
2283                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
2284                         continue;
2285                 }
2286
2287                 /*
2288                  * no-user-modification operational attributes are ignored
2289                  * by ACL_WRITE checking as any found here are not provided
2290                  * by the user
2291                  */
2292                 if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) {
2293                         Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
2294                                 " modify access granted\n",
2295                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
2296                         continue;
2297                 }
2298
2299                 switch ( mlist->sml_op ) {
2300                 case LDAP_MOD_REPLACE:
2301                         /*
2302                          * We must check both permission to delete the whole
2303                          * attribute and permission to add the specific attributes.
2304                          * This prevents abuse from selfwriters.
2305                          */
2306                         if ( ! access_allowed( op, e,
2307                                 mlist->sml_desc, NULL, ACL_WDEL, &state ) )
2308                         {
2309                                 ret = 0;
2310                                 goto done;
2311                         }
2312
2313                         if ( mlist->sml_values == NULL ) break;
2314
2315                         /* fall thru to check value to add */
2316
2317                 case LDAP_MOD_ADD:
2318                         assert( mlist->sml_values != NULL );
2319
2320                         for ( bv = mlist->sml_nvalues
2321                                         ? mlist->sml_nvalues : mlist->sml_values;
2322                                 bv->bv_val != NULL; bv++ )
2323                         {
2324                                 if ( ! access_allowed( op, e,
2325                                         mlist->sml_desc, bv, ACL_WADD, &state ) )
2326                                 {
2327                                         ret = 0;
2328                                         goto done;
2329                                 }
2330                         }
2331                         break;
2332
2333                 case LDAP_MOD_DELETE:
2334                         if ( mlist->sml_values == NULL ) {
2335                                 if ( ! access_allowed( op, e,
2336                                         mlist->sml_desc, NULL, ACL_WDEL, NULL ) )
2337                                 {
2338                                         ret = 0;
2339                                         goto done;
2340                                 }
2341                                 break;
2342                         }
2343                         for ( bv = mlist->sml_nvalues
2344                                         ? mlist->sml_nvalues : mlist->sml_values;
2345                                 bv->bv_val != NULL; bv++ )
2346                         {
2347                                 if ( ! access_allowed( op, e,
2348                                         mlist->sml_desc, bv, ACL_WDEL, &state ) )
2349                                 {
2350                                         ret = 0;
2351                                         goto done;
2352                                 }
2353                         }
2354                         break;
2355
2356                 case SLAP_MOD_SOFTADD:
2357                         /* allow adding attribute via modrdn thru */
2358                         break;
2359
2360                 default:
2361                         assert( 0 );
2362                         /* not reached */
2363                         ret = 0;
2364                         break;
2365                 }
2366         }
2367
2368 done:
2369         if (be_null) op->o_bd = NULL;
2370         return( ret );
2371 }
2372
2373 static int
2374 aci_get_part(
2375         struct berval   *list,
2376         int             ix,
2377         char            sep,
2378         struct berval   *bv )
2379 {
2380         int     len;
2381         char    *p;
2382
2383         if ( bv ) {
2384                 BER_BVZERO( bv );
2385         }
2386         len = list->bv_len;
2387         p = list->bv_val;
2388         while ( len >= 0 && --ix >= 0 ) {
2389                 while ( --len >= 0 && *p++ != sep )
2390                         ;
2391         }
2392         while ( len >= 0 && *p == ' ' ) {
2393                 len--;
2394                 p++;
2395         }
2396         if ( len < 0 ) {
2397                 return -1;
2398         }
2399
2400         if ( !bv ) {
2401                 return 0;
2402         }
2403
2404         bv->bv_val = p;
2405         while ( --len >= 0 && *p != sep ) {
2406                 bv->bv_len++;
2407                 p++;
2408         }
2409         while ( bv->bv_len > 0 && *--p == ' ' ) {
2410                 bv->bv_len--;
2411         }
2412
2413         return bv->bv_len;
2414 }
2415
2416 typedef struct aci_set_gather_t {
2417         SetCookie               *cookie;
2418         BerVarray               bvals;
2419 } aci_set_gather_t;
2420
2421 static int
2422 aci_set_cb_gather( Operation *op, SlapReply *rs )
2423 {
2424         aci_set_gather_t        *p = (aci_set_gather_t *)op->o_callback->sc_private;
2425
2426         if ( rs->sr_type == REP_SEARCH ) {
2427                 BerValue        bvals[ 2 ];
2428                 BerVarray       bvalsp = NULL;
2429                 int             j;
2430
2431                 for ( j = 0; !BER_BVISNULL( &rs->sr_attrs[ j ].an_name ); j++ ) {
2432                         AttributeDescription    *desc = rs->sr_attrs[ j ].an_desc;
2433
2434                         if ( desc == slap_schema.si_ad_entryDN ) {
2435                                 bvalsp = bvals;
2436                                 bvals[ 0 ] = rs->sr_entry->e_nname;
2437                                 BER_BVZERO( &bvals[ 1 ] );
2438
2439                         } else {
2440                                 Attribute       *a;
2441
2442                                 a = attr_find( rs->sr_entry->e_attrs, desc );
2443                                 if ( a != NULL ) {
2444                                         int     i;
2445
2446                                         for ( i = 0; !BER_BVISNULL( &a->a_nvals[ i ] ); i++ )
2447                                                 ;
2448
2449                                         bvalsp = a->a_nvals;
2450                                 }
2451                         }
2452                 }
2453
2454                 if ( bvals ) {
2455                         p->bvals = slap_set_join( p->cookie, p->bvals,
2456                                         ( '|' | SLAP_SET_RREF ), bvalsp );
2457                 }
2458
2459         } else {
2460                 assert( rs->sr_type == REP_RESULT );
2461         }
2462
2463         return 0;
2464 }
2465
2466 BerVarray
2467 aci_set_gather( SetCookie *cookie, struct berval *name, AttributeDescription *desc )
2468 {
2469         AciSetCookie            *cp = (AciSetCookie *)cookie;
2470         int                     rc = 0;
2471         LDAPURLDesc             *ludp = NULL;
2472         Operation               op2 = { 0 };
2473         SlapReply               rs = {REP_RESULT};
2474         AttributeName           anlist[ 2 ], *anlistp = NULL;
2475         int                     nattrs = 0;
2476         slap_callback           cb = { NULL, aci_set_cb_gather, NULL, NULL };
2477         aci_set_gather_t        p = { 0 };
2478         const char              *text = NULL;
2479         static struct berval    defaultFilter_bv = BER_BVC( "(objectClass=*)" );
2480
2481         /* this routine needs to return the bervals instead of
2482          * plain strings, since syntax is not known.  It should
2483          * also return the syntax or some "comparison cookie".
2484          */
2485         if ( strncasecmp( name->bv_val, "ldap:///", STRLENOF( "ldap:///" ) ) != 0 ) {
2486                 return aci_set_gather2( cookie, name, desc );
2487         }
2488
2489         rc = ldap_url_parse( name->bv_val, &ludp );
2490         if ( rc != LDAP_URL_SUCCESS ) {
2491                 rc = LDAP_PROTOCOL_ERROR;
2492                 goto url_done;
2493         }
2494
2495         if ( ( ludp->lud_host && ludp->lud_host[0] ) || ludp->lud_exts )
2496         {
2497                 /* host part must be empty */
2498                 /* extensions parts must be empty */
2499                 rc = LDAP_PROTOCOL_ERROR;
2500                 goto url_done;
2501         }
2502
2503         /* Grab the searchbase and see if an appropriate database can be found */
2504         ber_str2bv( ludp->lud_dn, 0, 0, &op2.o_req_dn );
2505         rc = dnNormalize( 0, NULL, NULL, &op2.o_req_dn,
2506                         &op2.o_req_ndn, cp->op->o_tmpmemctx );
2507         BER_BVZERO( &op2.o_req_dn );
2508         if ( rc != LDAP_SUCCESS ) {
2509                 goto url_done;
2510         }
2511
2512         op2.o_bd = select_backend( &op2.o_req_ndn, 0, 1 );
2513         if ( ( op2.o_bd == NULL ) || ( op2.o_bd->be_search == NULL ) ) {
2514                 rc = LDAP_NO_SUCH_OBJECT;
2515                 goto url_done;
2516         }
2517
2518         /* Grab the filter */
2519         if ( ludp->lud_filter ) {
2520                 ber_str2bv_x( ludp->lud_filter, 0, 0, &op2.ors_filterstr,
2521                                 cp->op->o_tmpmemctx );
2522
2523         } else {
2524                 op2.ors_filterstr = defaultFilter_bv;
2525         }
2526
2527         op2.ors_filter = str2filter_x( cp->op, op2.ors_filterstr.bv_val );
2528         if ( op2.ors_filter == NULL ) {
2529                 rc = LDAP_PROTOCOL_ERROR;
2530                 goto url_done;
2531         }
2532
2533         /* Grab the scope */
2534         op2.ors_scope = ludp->lud_scope;
2535
2536         /* Grap the attributes */
2537         if ( ludp->lud_attrs ) {
2538                 for ( ; ludp->lud_attrs[ nattrs ]; nattrs++ )
2539                         ;
2540
2541                 anlistp = slap_sl_malloc( sizeof( AttributeName ) * ( nattrs + 2 ),
2542                                 cp->op->o_tmpmemctx );
2543
2544                 for ( ; ludp->lud_attrs[ nattrs ]; nattrs++ ) {
2545                         ber_str2bv( ludp->lud_attrs[ nattrs ], 0, 0, &anlistp[ nattrs ].an_name );
2546                         anlistp[ nattrs ].an_desc = NULL;
2547                         rc = slap_bv2ad( &anlistp[ nattrs ].an_name,
2548                                         &anlistp[ nattrs ].an_desc, &text );
2549                         if ( rc != LDAP_SUCCESS ) {
2550                                 goto url_done;
2551                         }
2552                 }
2553
2554         } else {
2555                 anlistp = anlist;
2556         }
2557
2558         anlistp[ nattrs ].an_name = desc->ad_cname;
2559         anlistp[ nattrs ].an_desc = desc;
2560
2561         BER_BVZERO( &anlistp[ nattrs + 1 ].an_name );
2562
2563         p.cookie = cookie;
2564
2565         op2.o_hdr = cp->op->o_hdr;
2566         op2.o_tag = LDAP_REQ_SEARCH;
2567         op2.o_ndn = op2.o_bd->be_rootndn;
2568         op2.o_callback = &cb;
2569         op2.o_time = slap_get_time();
2570         op2.o_do_not_cache = 1;
2571         op2.o_is_auth_check = 0;
2572         ber_dupbv_x( &op2.o_req_dn, &op2.o_req_ndn, cp->op->o_tmpmemctx );
2573         op2.ors_slimit = SLAP_NO_LIMIT;
2574         op2.ors_tlimit = SLAP_NO_LIMIT;
2575         op2.ors_attrs = anlistp;
2576         op2.ors_attrsonly = 0;
2577         op2.o_private = cp->op->o_private;
2578
2579         cb.sc_private = &p;
2580
2581         rc = op2.o_bd->be_search( &op2, &rs );
2582         if ( rc != 0 ) {
2583                 goto url_done;
2584         }
2585
2586 url_done:;
2587         if ( op2.ors_filter ) {
2588                 filter_free_x( cp->op, op2.ors_filter );
2589         }
2590         if ( !BER_BVISNULL( &op2.o_req_ndn ) ) {
2591                 slap_sl_free( op2.o_req_ndn.bv_val, cp->op->o_tmpmemctx );
2592         }
2593         if ( !BER_BVISNULL( &op2.o_req_dn ) ) {
2594                 slap_sl_free( op2.o_req_dn.bv_val, cp->op->o_tmpmemctx );
2595         }
2596         if ( ludp ) {
2597                 ldap_free_urldesc( ludp );
2598         }
2599         if ( anlistp && anlistp != anlist ) {
2600                 slap_sl_free( anlistp, cp->op->o_tmpmemctx );
2601         }
2602
2603         return p.bvals;
2604 }
2605
2606 BerVarray
2607 aci_set_gather2( SetCookie *cookie, struct berval *name, AttributeDescription *desc )
2608 {
2609         AciSetCookie    *cp = (AciSetCookie *)cookie;
2610         BerVarray       bvals = NULL;
2611         struct berval   ndn;
2612         int             rc = 0;
2613
2614         /* this routine needs to return the bervals instead of
2615          * plain strings, since syntax is not known.  It should
2616          * also return the syntax or some "comparison cookie".
2617          */
2618         rc = dnNormalize( 0, NULL, NULL, name, &ndn, cp->op->o_tmpmemctx );
2619         if ( rc == LDAP_SUCCESS ) {
2620                 if ( desc == slap_schema.si_ad_entryDN ) {
2621                         bvals = (BerVarray)slap_sl_malloc( sizeof( BerValue ) * 2,
2622                                         cp->op->o_tmpmemctx );
2623                         bvals[ 0 ] = ndn;
2624                         BER_BVZERO( &bvals[ 1 ] );
2625                         BER_BVZERO( &ndn );
2626
2627                 } else {
2628                         backend_attribute( cp->op,
2629                                 cp->e, &ndn, desc, &bvals, ACL_NONE );
2630                 }
2631
2632                 if ( !BER_BVISNULL( &ndn ) ) {
2633                         slap_sl_free( ndn.bv_val, cp->op->o_tmpmemctx );
2634                 }
2635         }
2636
2637         return bvals;
2638 }
2639
2640 static int
2641 aci_match_set (
2642         struct berval *subj,
2643         Operation *op,
2644         Entry *e,
2645         int setref
2646 )
2647 {
2648         struct berval   set = BER_BVNULL;
2649         int             rc = 0;
2650         AciSetCookie    cookie;
2651
2652         if ( setref == 0 ) {
2653                 ber_dupbv_x( &set, subj, op->o_tmpmemctx );
2654
2655         } else {
2656                 struct berval           subjdn, ndn = BER_BVNULL;
2657                 struct berval           setat;
2658                 BerVarray               bvals;
2659                 const char              *text;
2660                 AttributeDescription    *desc = NULL;
2661
2662                 /* format of string is "entry/setAttrName" */
2663                 if ( aci_get_part( subj, 0, '/', &subjdn ) < 0 ) {
2664                         return 0;
2665                 }
2666
2667                 if ( aci_get_part( subj, 1, '/', &setat ) < 0 ) {
2668                         setat = aci_bv_set_attr;
2669                 }
2670
2671                 /*
2672                  * NOTE: dnNormalize honors the ber_len field
2673                  * as the length of the dn to be normalized
2674                  */
2675                 if ( slap_bv2ad( &setat, &desc, &text ) == LDAP_SUCCESS ) {
2676                         if ( dnNormalize( 0, NULL, NULL, &subjdn, &ndn, op->o_tmpmemctx ) == LDAP_SUCCESS )
2677                         {
2678                                 backend_attribute( op, e, &ndn, desc, &bvals, ACL_NONE );
2679                                 if ( bvals != NULL && !BER_BVISNULL( &bvals[0] ) ) {
2680                                         int     i;
2681
2682                                         set = bvals[0];
2683                                         BER_BVZERO( &bvals[0] );
2684                                         for ( i = 1; !BER_BVISNULL( &bvals[i] ); i++ )
2685                                                 /* count */ ;
2686                                         bvals[0].bv_val = bvals[i-1].bv_val;
2687                                         BER_BVZERO( &bvals[i-1] );
2688                                 }
2689                                 ber_bvarray_free_x( bvals, op->o_tmpmemctx );
2690                                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
2691                         }
2692                 }
2693         }
2694
2695         if ( !BER_BVISNULL( &set ) ) {
2696                 cookie.op = op;
2697                 cookie.e = e;
2698                 rc = ( slap_set_filter( aci_set_gather, (SetCookie *)&cookie, &set,
2699                         &op->o_ndn, &e->e_nname, NULL ) > 0 );
2700                 slap_sl_free( set.bv_val, op->o_tmpmemctx );
2701         }
2702
2703         return(rc);
2704 }
2705
2706 #ifdef SLAPD_ACI_ENABLED
2707 static int
2708 aci_list_map_rights(
2709         struct berval *list )
2710 {
2711         struct berval bv;
2712         slap_access_t mask;
2713         int i;
2714
2715         ACL_INIT(mask);
2716         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
2717                 if (bv.bv_len <= 0)
2718                         continue;
2719                 switch (*bv.bv_val) {
2720                 case 'c':
2721                         ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
2722                         break;
2723                 case 's':
2724                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines
2725                          * the right 's' to mean "set", but in the examples states
2726                          * that the right 's' means "search".  The latter definition
2727                          * is used here.
2728                          */
2729                         ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
2730                         break;
2731                 case 'r':
2732                         ACL_PRIV_SET(mask, ACL_PRIV_READ);
2733                         break;
2734                 case 'w':
2735                         ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
2736                         break;
2737                 case 'x':
2738                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not
2739                          * define any equivalent to the AUTH right, so I've just used
2740                          * 'x' for now.
2741                          */
2742                         ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
2743                         break;
2744                 default:
2745                         break;
2746                 }
2747
2748         }
2749         return(mask);
2750 }
2751
2752 static int
2753 aci_list_has_attr(
2754         struct berval *list,
2755         const struct berval *attr,
2756         struct berval *val )
2757 {
2758         struct berval bv, left, right;
2759         int i;
2760
2761         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
2762                 if (aci_get_part(&bv, 0, '=', &left) < 0
2763                         || aci_get_part(&bv, 1, '=', &right) < 0)
2764                 {
2765                         if (ber_bvstrcasecmp(attr, &bv) == 0)
2766                                 return(1);
2767                 } else if (val == NULL) {
2768                         if (ber_bvstrcasecmp(attr, &left) == 0)
2769                                 return(1);
2770                 } else {
2771                         if (ber_bvstrcasecmp(attr, &left) == 0) {
2772                                 /* this is experimental code that implements a
2773                                  * simple (prefix) match of the attribute value.
2774                                  * the ACI draft does not provide for aci's that
2775                                  * apply to specific values, but it would be
2776                                  * nice to have.  If the <attr> part of an aci's
2777                                  * rights list is of the form <attr>=<value>,
2778                                  * that means the aci applies only to attrs with
2779                                  * the given value.  Furthermore, if the attr is
2780                                  * of the form <attr>=<value>*, then <value> is
2781                                  * treated as a prefix, and the aci applies to
2782                                  * any value with that prefix.
2783                                  *
2784                                  * Ideally, this would allow r.e. matches.
2785                                  */
2786                                 if (aci_get_part(&right, 0, '*', &left) < 0
2787                                         || right.bv_len <= left.bv_len)
2788                                 {
2789                                         if (ber_bvstrcasecmp(val, &right) == 0)
2790                                                 return(1);
2791                                 } else if (val->bv_len >= left.bv_len) {
2792                                         if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0)
2793                                                 return(1);
2794                                 }
2795                         }
2796                 }
2797         }
2798         return(0);
2799 }
2800
2801 static slap_access_t
2802 aci_list_get_attr_rights(
2803         struct berval *list,
2804         const struct berval *attr,
2805         struct berval *val )
2806 {
2807     struct berval bv;
2808     slap_access_t mask;
2809     int i;
2810
2811         /* loop through each rights/attr pair, skip first part (action) */
2812         ACL_INIT(mask);
2813         for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
2814                 if (aci_list_has_attr(&bv, attr, val) == 0)
2815                         continue;
2816                 if (aci_get_part(list, i, ';', &bv) < 0)
2817                         continue;
2818                 mask |= aci_list_map_rights(&bv);
2819         }
2820         return(mask);
2821 }
2822
2823 static int
2824 aci_list_get_rights(
2825         struct berval *list,
2826         const struct berval *attr,
2827         struct berval *val,
2828         slap_access_t *grant,
2829         slap_access_t *deny )
2830 {
2831     struct berval perm, actn;
2832     slap_access_t *mask;
2833     int i, found;
2834
2835         if (attr == NULL || attr->bv_len == 0
2836                         || ber_bvstrcasecmp( attr, &aci_bv_entry ) == 0) {
2837                 attr = &aci_bv_br_entry;
2838         }
2839
2840         found = 0;
2841         ACL_INIT(*grant);
2842         ACL_INIT(*deny);
2843         /* loop through each permissions clause */
2844         for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) {
2845                 if (aci_get_part(&perm, 0, ';', &actn) < 0)
2846                         continue;
2847                 if (ber_bvstrcasecmp( &aci_bv_grant, &actn ) == 0) {
2848                         mask = grant;
2849                 } else if (ber_bvstrcasecmp( &aci_bv_deny, &actn ) == 0) {
2850                         mask = deny;
2851                 } else {
2852                         continue;
2853                 }
2854
2855                 found = 1;
2856                 *mask |= aci_list_get_attr_rights(&perm, attr, val);
2857                 *mask |= aci_list_get_attr_rights(&perm, &aci_bv_br_all, NULL);
2858         }
2859         return(found);
2860 }
2861
2862 static int
2863 aci_group_member (
2864         struct berval   *subj,
2865         struct berval   *defgrpoc,
2866         struct berval   *defgrpat,
2867         Operation       *op,
2868         Entry           *e,
2869         int             nmatch,
2870         regmatch_t      *matches
2871 )
2872 {
2873         struct berval subjdn;
2874         struct berval grpoc;
2875         struct berval grpat;
2876         ObjectClass *grp_oc = NULL;
2877         AttributeDescription *grp_ad = NULL;
2878         const char *text;
2879         int rc;
2880
2881         /* format of string is "group/objectClassValue/groupAttrName" */
2882         if (aci_get_part(subj, 0, '/', &subjdn) < 0) {
2883                 return(0);
2884         }
2885
2886         if (aci_get_part(subj, 1, '/', &grpoc) < 0) {
2887                 grpoc = *defgrpoc;
2888         }
2889
2890         if (aci_get_part(subj, 2, '/', &grpat) < 0) {
2891                 grpat = *defgrpat;
2892         }
2893
2894         rc = slap_bv2ad( &grpat, &grp_ad, &text );
2895         if( rc != LDAP_SUCCESS ) {
2896                 rc = 0;
2897                 goto done;
2898         }
2899         rc = 0;
2900
2901         grp_oc = oc_bvfind( &grpoc );
2902
2903         if (grp_oc != NULL && grp_ad != NULL ) {
2904                 char buf[ACL_BUF_SIZE];
2905                 struct berval bv, ndn;
2906                 bv.bv_len = sizeof( buf ) - 1;
2907                 bv.bv_val = (char *)&buf;
2908                 if ( string_expand(&bv, &subjdn,
2909                                 e->e_ndn, nmatch, matches) )
2910                 {
2911                         rc = LDAP_OTHER;
2912                         goto done;
2913                 }
2914                 if ( dnNormalize( 0, NULL, NULL, &bv, &ndn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
2915                         rc = ( backend_group( op, e, &ndn, &op->o_ndn,
2916                                 grp_oc, grp_ad ) == 0 );
2917                         slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
2918                 }
2919         }
2920
2921 done:
2922         return(rc);
2923 }
2924
2925 static int
2926 aci_mask(
2927         Operation               *op,
2928         Entry                   *e,
2929         AttributeDescription    *desc,
2930         struct berval           *val,
2931         struct berval           *aci,
2932         int                     nmatch,
2933         regmatch_t              *matches,
2934         slap_access_t           *grant,
2935         slap_access_t           *deny,
2936         slap_aci_scope_t        asserted_scope
2937 )
2938 {
2939         struct berval           bv, scope, perms, type, sdn;
2940         int                     rc;
2941
2942
2943         assert( !BER_BVISNULL( &desc->ad_cname ) );
2944
2945         /* parse an aci of the form:
2946                 oid # scope # action;rights;attr;rights;attr
2947                         $ action;rights;attr;rights;attr # type # subject
2948
2949            [NOTE: the following comment is very outdated,
2950            as the draft version it refers to (Ando, 2004-11-20)].
2951
2952            See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
2953            a full description of the format for this attribute.
2954            Differences: "this" in the draft is "self" here, and
2955            "self" and "public" is in the position of type.
2956
2957            <scope> = {entry|children|subtree}
2958            <type> = {public|users|access-id|subtree|onelevel|children|
2959                      self|dnattr|group|role|set|set-ref}
2960
2961            This routine now supports scope={ENTRY,CHILDREN}
2962            with the semantics:
2963              - ENTRY applies to "entry" and "subtree";
2964              - CHILDREN aplies to "children" and "subtree"
2965          */
2966
2967         /* check that the aci has all 5 components */
2968         if ( aci_get_part( aci, 4, '#', NULL ) < 0 ) {
2969                 return 0;
2970         }
2971
2972         /* check that the aci family is supported */
2973         if ( aci_get_part( aci, 0, '#', &bv ) < 0 ) {
2974                 return 0;
2975         }
2976
2977         /* check that the scope matches */
2978         if ( aci_get_part( aci, 1, '#', &scope ) < 0 ) {
2979                 return 0;
2980         }
2981
2982         /* note: scope can be either ENTRY or CHILDREN;
2983          * they respectively match "entry" and "children" in bv
2984          * both match "subtree" */
2985         switch ( asserted_scope ) {
2986         case SLAP_ACI_SCOPE_ENTRY:
2987                 if ( ber_bvstrcasecmp( &scope, &aci_bv_entry ) != 0
2988                                 && ber_bvstrcasecmp( &scope, &aci_bv_subtree ) != 0 )
2989                 {
2990                         return 0;
2991                 }
2992                 break;
2993
2994         case SLAP_ACI_SCOPE_CHILDREN:
2995                 if ( ber_bvstrcasecmp( &scope, &aci_bv_children ) != 0
2996                                 && ber_bvstrcasecmp( &scope, &aci_bv_subtree ) != 0 )
2997                 {
2998                         return 0;
2999                 }
3000                 break;
3001
3002         default:
3003                 return 0;
3004         }
3005
3006         /* get the list of permissions clauses, bail if empty */
3007         if ( aci_get_part( aci, 2, '#', &perms ) <= 0 ) {
3008                 return 0;
3009         }
3010
3011         /* check if any permissions allow desired access */
3012         if ( aci_list_get_rights( &perms, &desc->ad_cname, val, grant, deny ) == 0 ) {
3013                 return 0;
3014         }
3015
3016         /* see if we have a DN match */
3017         if ( aci_get_part( aci, 3, '#', &type ) < 0 ) {
3018                 return 0;
3019         }
3020
3021         /* see if we have a public (i.e. anonymous) access */
3022         if ( ber_bvstrcasecmp( &aci_bv_public, &type ) == 0 ) {
3023                 return 1;
3024         }
3025
3026         /* otherwise require an identity */
3027         if ( BER_BVISNULL( &op->o_ndn ) || BER_BVISEMPTY( &op->o_ndn ) ) {
3028                 return 0;
3029         }
3030
3031         /* see if we have a users access */
3032         if ( ber_bvstrcasecmp( &aci_bv_users, &type ) == 0 ) {
3033                 return 1;
3034         }
3035
3036         /* NOTE: this may fail if a DN contains a valid '#' (unescaped);
3037          * just grab all the berval up to its end (ITS#3303).
3038          * NOTE: the problem could be solved by providing the DN with
3039          * the embedded '#' encoded as hexpairs: "cn=Foo#Bar" would
3040          * become "cn=Foo\23Bar" and be safely used by aci_mask(). */
3041 #if 0
3042         if ( aci_get_part( aci, 4, '#', &sdn ) < 0 ) {
3043                 return 0;
3044         }
3045 #endif
3046         sdn.bv_val = type.bv_val + type.bv_len + STRLENOF( "#" );
3047         sdn.bv_len = aci->bv_len - ( sdn.bv_val - aci->bv_val );
3048
3049         if ( ber_bvstrcasecmp( &aci_bv_access_id, &type ) == 0 ) {
3050                 struct berval ndn;
3051
3052                 rc = dnNormalize( 0, NULL, NULL, &sdn, &ndn, op->o_tmpmemctx );
3053                 if ( rc != LDAP_SUCCESS ) {
3054                         return 0;
3055                 }
3056
3057                 if ( dn_match( &op->o_ndn, &ndn ) ) {
3058                         rc = 1;
3059                 }
3060                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
3061
3062                 return rc;
3063
3064         } else if ( ber_bvstrcasecmp( &aci_bv_subtree, &type ) == 0 ) {
3065                 struct berval ndn;
3066
3067                 rc = dnNormalize( 0, NULL, NULL, &sdn, &ndn, op->o_tmpmemctx );
3068                 if ( rc != LDAP_SUCCESS ) {
3069                         return 0;
3070                 }
3071
3072                 if ( dnIsSuffix( &op->o_ndn, &ndn ) ) {
3073                         rc = 1;
3074                 }
3075                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
3076
3077                 return rc;
3078
3079         } else if ( ber_bvstrcasecmp( &aci_bv_onelevel, &type ) == 0 ) {
3080                 struct berval ndn, pndn;
3081
3082                 rc = dnNormalize( 0, NULL, NULL, &sdn, &ndn, op->o_tmpmemctx );
3083                 if ( rc != LDAP_SUCCESS ) {
3084                         return 0;
3085                 }
3086
3087                 dnParent( &ndn, &pndn );
3088
3089                 if ( dn_match( &op->o_ndn, &pndn ) ) {
3090                         rc = 1;
3091                 }
3092                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
3093
3094                 return rc;
3095
3096         } else if ( ber_bvstrcasecmp( &aci_bv_children, &type ) == 0 ) {
3097                 struct berval ndn;
3098
3099                 rc = dnNormalize( 0, NULL, NULL, &sdn, &ndn, op->o_tmpmemctx );
3100                 if ( rc != LDAP_SUCCESS ) {
3101                         return 0;
3102                 }
3103
3104                 if ( !dn_match( &op->o_ndn, &ndn )
3105                                 && dnIsSuffix( &op->o_ndn, &ndn ) )
3106                 {
3107                         rc = 1;
3108                 }
3109                 slap_sl_free( ndn.bv_val, op->o_tmpmemctx );
3110
3111                 return rc;
3112
3113         } else if ( ber_bvstrcasecmp( &aci_bv_self, &type ) == 0 ) {
3114                 if ( dn_match( &op->o_ndn, &e->e_nname ) ) {
3115                         return 1;
3116                 }
3117
3118         } else if ( ber_bvstrcasecmp( &aci_bv_dnattr, &type ) == 0 ) {
3119                 Attribute               *at;
3120                 AttributeDescription    *ad = NULL;
3121                 const char              *text;
3122
3123                 rc = slap_bv2ad( &sdn, &ad, &text );
3124
3125                 if( rc != LDAP_SUCCESS ) {
3126                         return 0;
3127                 }
3128
3129                 rc = 0;
3130
3131                 for ( at = attrs_find( e->e_attrs, ad );
3132                                 at != NULL;
3133                                 at = attrs_find( at->a_next, ad ) )
3134                 {
3135                         if ( value_find_ex( ad,
3136                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
3137                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
3138                                 at->a_nvals,
3139                                 &op->o_ndn, op->o_tmpmemctx ) == 0 )
3140                         {
3141                                 rc = 1;
3142                                 break;
3143                         }
3144                 }
3145
3146                 return rc;
3147
3148         } else if ( ber_bvstrcasecmp( &aci_bv_group, &type ) == 0 ) {
3149                 if ( aci_group_member( &sdn, &aci_bv_group_class,
3150                                 &aci_bv_group_attr, op, e, nmatch, matches ) )
3151                 {
3152                         return 1;
3153                 }
3154
3155         } else if ( ber_bvstrcasecmp( &aci_bv_role, &type ) == 0 ) {
3156                 if ( aci_group_member( &sdn, &aci_bv_role_class,
3157                                 &aci_bv_role_attr, op, e, nmatch, matches ) )
3158                 {
3159                         return 1;
3160                 }
3161
3162         } else if ( ber_bvstrcasecmp( &aci_bv_set, &type ) == 0 ) {
3163                 if ( aci_match_set( &sdn, op, e, 0 ) ) {
3164                         return 1;
3165                 }
3166
3167         } else if ( ber_bvstrcasecmp( &aci_bv_set_ref, &type ) == 0 ) {
3168                 if ( aci_match_set( &sdn, op, e, 1 ) ) {
3169                         return 1;
3170                 }
3171         }
3172
3173         return 0;
3174 }
3175
3176 #ifdef SLAP_DYNACL
3177 /*
3178  * FIXME: there is a silly dependence that makes it difficult
3179  * to move ACIs in a run-time loadable module under the "dynacl"
3180  * umbrella, because sets share some helpers with ACIs.
3181  */
3182 static int
3183 dynacl_aci_parse( const char *fname, int lineno, slap_style_t sty, const char *right, void **privp )
3184 {
3185         AttributeDescription    *ad = NULL;
3186         const char              *text = NULL;
3187
3188         if ( sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE ) {
3189                 fprintf( stderr, "%s: line %d: "
3190                         "inappropriate style \"%s\" in \"aci\" by clause\n",
3191                         fname, lineno, style_strings[sty] );
3192                 return -1;
3193         }
3194
3195         if ( right != NULL && *right != '\0' ) {
3196                 if ( slap_str2ad( right, &ad, &text ) != LDAP_SUCCESS ) {
3197                         fprintf( stderr,
3198                                 "%s: line %d: aci \"%s\": %s\n",
3199                                 fname, lineno, right, text );
3200                         return -1;
3201                 }
3202
3203         } else {
3204                 ad = slap_schema.si_ad_aci;
3205         }
3206
3207         if ( !is_at_syntax( ad->ad_type, SLAPD_ACI_SYNTAX) ) {
3208                 fprintf( stderr, "%s: line %d: "
3209                         "aci \"%s\": inappropriate syntax: %s\n",
3210                         fname, lineno, right,
3211                         ad->ad_type->sat_syntax_oid );
3212                 return -1;
3213         }
3214
3215         *privp = (void *)ad;
3216
3217         return 0;
3218 }
3219
3220 static int
3221 dynacl_aci_unparse( void *priv, struct berval *bv )
3222 {
3223         AttributeDescription    *ad = ( AttributeDescription * )priv;
3224         char *ptr;
3225
3226         assert( ad != NULL );
3227
3228         bv->bv_val = ch_malloc( STRLENOF(" aci=") + ad->ad_cname.bv_len + 1 );
3229         ptr = lutil_strcopy( bv->bv_val, " aci=" );
3230         ptr = lutil_strcopy( ptr, ad->ad_cname.bv_val );
3231         bv->bv_len = ptr - bv->bv_val;
3232
3233         return 0;
3234 }
3235
3236
3237 static int
3238 dynacl_aci_mask(
3239                 void                    *priv,
3240                 Operation               *op,
3241                 Entry                   *e,
3242                 AttributeDescription    *desc,
3243                 struct berval           *val,
3244                 int                     nmatch,
3245                 regmatch_t              *matches,
3246                 slap_access_t           *grantp,
3247                 slap_access_t           *denyp )
3248 {
3249         AttributeDescription    *ad = ( AttributeDescription * )priv;
3250         Attribute               *at;
3251         slap_access_t           tgrant, tdeny, grant, deny;
3252 #ifdef LDAP_DEBUG
3253         char                    accessmaskbuf[ACCESSMASK_MAXLEN];
3254         char                    accessmaskbuf1[ACCESSMASK_MAXLEN];
3255 #endif /* LDAP_DEBUG */
3256
3257         /* start out with nothing granted, nothing denied */
3258         ACL_INIT(tgrant);
3259         ACL_INIT(tdeny);
3260
3261         /* get the aci attribute */
3262         at = attr_find( e->e_attrs, ad );
3263         if ( at != NULL ) {
3264                 int             i;
3265
3266                 /* the aci is an multi-valued attribute.  The
3267                  * rights are determined by OR'ing the individual
3268                  * rights given by the acis.
3269                  */
3270                 for ( i = 0; !BER_BVISNULL( &at->a_nvals[i] ); i++ ) {
3271                         if ( aci_mask( op, e, desc, val, &at->a_nvals[i],
3272                                         nmatch, matches, &grant, &deny,
3273                                         SLAP_ACI_SCOPE_ENTRY ) != 0 )
3274                         {
3275                                 tgrant |= grant;
3276                                 tdeny |= deny;
3277                         }
3278                 }
3279
3280                 Debug( LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n",
3281                           accessmask2str( tgrant, accessmaskbuf, 1 ),
3282                           accessmask2str( tdeny, accessmaskbuf1, 1 ), 0 );
3283         }
3284
3285         /* If the entry level aci didn't contain anything valid for the
3286          * current operation, climb up the tree and evaluate the
3287          * acis with scope set to subtree
3288          */
3289         if ( tgrant == ACL_PRIV_NONE && tdeny == ACL_PRIV_NONE ) {
3290                 struct berval   parent_ndn;
3291
3292 #if 1
3293                 /* to solve the chicken'n'egg problem of accessing
3294                  * the OpenLDAPaci attribute, the direct access
3295                  * to the entry's attribute is unchecked; however,
3296                  * further accesses to OpenLDAPaci values in the
3297                  * ancestors occur through backend_attribute(), i.e.
3298                  * with the identity of the operation, requiring
3299                  * further access checking.  For uniformity, this
3300                  * makes further requests occur as the rootdn, if
3301                  * any, i.e. searching for the OpenLDAPaci attribute
3302                  * is considered an internal search.  If this is not
3303                  * acceptable, then the same check needs be performed
3304                  * when accessing the entry's attribute. */
3305                 Operation       op2 = *op;
3306
3307                 if ( !BER_BVISNULL( &op->o_bd->be_rootndn ) ) {
3308                         op2.o_dn = op->o_bd->be_rootdn;
3309                         op2.o_ndn = op->o_bd->be_rootndn;
3310                 }
3311 #endif
3312
3313                 dnParent( &e->e_nname, &parent_ndn );
3314                 while ( !BER_BVISEMPTY( &parent_ndn ) ){
3315                         int             i;
3316                         BerVarray       bvals = NULL;
3317                         int             ret, stop;
3318
3319                         Debug( LDAP_DEBUG_ACL, "checking ACI of \"%s\"\n", parent_ndn.bv_val, 0, 0 );
3320                         ret = backend_attribute( &op2, NULL, &parent_ndn, ad, &bvals, ACL_AUTH );
3321
3322                         switch ( ret ) {
3323                         case LDAP_SUCCESS :
3324                                 stop = 0;
3325                                 if ( !bvals ) {
3326                                         break;
3327                                 }
3328
3329                                 for ( i = 0; !BER_BVISNULL( &bvals[i] ); i++) {
3330                                         if ( aci_mask( op, e, desc, val,
3331                                                         &bvals[i],
3332                                                         nmatch, matches,
3333                                                         &grant, &deny,
3334                                                         SLAP_ACI_SCOPE_CHILDREN ) != 0 )
3335                                         {
3336                                                 tgrant |= grant;
3337                                                 tdeny |= deny;
3338                                                 /* evaluation stops as soon as either a "deny" or a
3339                                                  * "grant" directive matches.
3340                                                  */
3341                                                 if ( tgrant != ACL_PRIV_NONE || tdeny != ACL_PRIV_NONE ) {
3342                                                         stop = 1;
3343                                                 }
3344                                         }
3345                                         Debug( LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n",
3346                                                 accessmask2str( tgrant, accessmaskbuf, 1 ),
3347                                                 accessmask2str( tdeny, accessmaskbuf1, 1 ), 0 );
3348                                 }
3349                                 break;
3350
3351                         case LDAP_NO_SUCH_ATTRIBUTE:
3352                                 /* just go on if the aci-Attribute is not present in
3353                                  * the current entry
3354                                  */
3355                                 Debug( LDAP_DEBUG_ACL, "no such attribute\n", 0, 0, 0 );
3356                                 stop = 0;
3357                                 break;
3358
3359                         case LDAP_NO_SUCH_OBJECT:
3360                                 /* We have reached the base object */
3361                                 Debug( LDAP_DEBUG_ACL, "no such object\n", 0, 0, 0 );
3362                                 stop = 1;
3363                                 break;
3364
3365                         default:
3366                                 stop = 1;
3367                                 break;
3368                         }
3369
3370                         if ( stop ) {
3371                                 break;
3372                         }
3373                         dnParent( &parent_ndn, &parent_ndn );
3374                 }
3375         }
3376
3377         *grantp = tgrant;
3378         *denyp = tdeny;
3379
3380         return 0;
3381 }
3382
3383 /* need to register this at some point */
3384 static slap_dynacl_t    dynacl_aci = {
3385         "aci",
3386         dynacl_aci_parse,
3387         dynacl_aci_unparse,
3388         dynacl_aci_mask,
3389         NULL,
3390         NULL,
3391         NULL
3392 };
3393
3394 #endif /* SLAP_DYNACL */
3395
3396 #endif  /* SLAPD_ACI_ENABLED */
3397
3398 #ifdef SLAP_DYNACL
3399
3400 /*
3401  * dynamic ACL infrastructure
3402  */
3403 static slap_dynacl_t    *da_list = NULL;
3404
3405 int
3406 slap_dynacl_register( slap_dynacl_t *da )
3407 {
3408         slap_dynacl_t   *tmp;
3409
3410         for ( tmp = da_list; tmp; tmp = tmp->da_next ) {
3411                 if ( strcasecmp( da->da_name, tmp->da_name ) == 0 ) {
3412                         break;
3413                 }
3414         }
3415
3416         if ( tmp != NULL ) {
3417                 return -1;
3418         }
3419
3420         if ( da->da_mask == NULL ) {
3421                 return -1;
3422         }
3423
3424         da->da_private = NULL;
3425         da->da_next = da_list;
3426         da_list = da;
3427
3428         return 0;
3429 }
3430
3431 static slap_dynacl_t *
3432 slap_dynacl_next( slap_dynacl_t *da )
3433 {
3434         if ( da ) {
3435                 return da->da_next;
3436         }
3437         return da_list;
3438 }
3439
3440 slap_dynacl_t *
3441 slap_dynacl_get( const char *name )
3442 {
3443         slap_dynacl_t   *da;
3444
3445         for ( da = slap_dynacl_next( NULL ); da; da = slap_dynacl_next( da ) ) {
3446                 if ( strcasecmp( da->da_name, name ) == 0 ) {
3447                         break;
3448                 }
3449         }
3450
3451         return da;
3452 }
3453 #endif /* SLAP_DYNACL */
3454
3455 int
3456 acl_init( void )
3457 {
3458         int             i, rc;
3459 #ifdef SLAP_DYNACL
3460         slap_dynacl_t   *known_dynacl[] = {
3461 #ifdef SLAPD_ACI_ENABLED
3462                 &dynacl_aci,
3463 #endif  /* SLAPD_ACI_ENABLED */
3464                 NULL
3465         };
3466
3467         for ( i = 0; known_dynacl[ i ]; i++ ) {
3468                 rc = slap_dynacl_register( known_dynacl[ i ] );
3469                 if ( rc ) {
3470                         return rc;
3471                 }
3472         }
3473 #endif /* SLAP_DYNACL */
3474
3475         return 0;
3476 }
3477
3478 static int
3479 string_expand(
3480         struct berval   *bv,
3481         struct berval   *pat,
3482         char            *match,
3483         int             nmatch,
3484         regmatch_t      *matches)
3485 {
3486         ber_len_t       size;
3487         char   *sp;
3488         char   *dp;
3489         int     flag;
3490
3491         size = 0;
3492         bv->bv_val[0] = '\0';
3493         bv->bv_len--; /* leave space for lone $ */
3494
3495         flag = 0;
3496         for ( dp = bv->bv_val, sp = pat->bv_val; size < bv->bv_len &&
3497                 sp < pat->bv_val + pat->bv_len ; sp++ )
3498         {
3499                 /* did we previously see a $ */
3500                 if ( flag ) {
3501                         if ( flag == 1 && *sp == '$' ) {
3502                                 *dp++ = '$';
3503                                 size++;
3504                                 flag = 0;
3505
3506                         } else if ( flag == 1 && *sp == '{' /*'}'*/) {
3507                                 flag = 2;
3508
3509                         } else if ( *sp >= '0' && *sp <= '9' ) {
3510                                 int     n;
3511                                 int     i;
3512                                 int     l;
3513
3514                                 n = *sp - '0';
3515
3516                                 if ( flag == 2 ) {
3517                                         for ( sp++; *sp != '\0' && *sp != /*'{'*/ '}'; sp++ ) {
3518                                                 if ( *sp >= '0' && *sp <= '9' ) {
3519                                                         n = 10*n + ( *sp - '0' );
3520                                                 }
3521                                         }
3522
3523                                         if ( *sp != /*'{'*/ '}' ) {
3524                                                 /* FIXME: error */
3525                                                 return 1;
3526                                         }
3527                                 }
3528
3529                                 if ( n >= nmatch ) {
3530                                         /* FIXME: error */
3531                                         return 1;
3532                                 }
3533
3534                                 *dp = '\0';
3535                                 i = matches[n].rm_so;
3536                                 l = matches[n].rm_eo;
3537                                 for ( ; size < bv->bv_len && i < l; size++, i++ ) {
3538                                         *dp++ = match[i];
3539                                 }
3540                                 *dp = '\0';
3541
3542                                 flag = 0;
3543                         }
3544                 } else {
3545                         if (*sp == '$') {
3546                                 flag = 1;
3547                         } else {
3548                                 *dp++ = *sp;
3549                                 size++;
3550                         }
3551                 }
3552         }
3553
3554         if ( flag ) {
3555                 /* must have ended with a single $ */
3556                 *dp++ = '$';
3557                 size++;
3558         }
3559
3560         *dp = '\0';
3561         bv->bv_len = size;
3562
3563         Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern:  %.*s\n", (int)pat->bv_len, pat->bv_val, 0 );
3564         Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", bv->bv_val, 0, 0 );
3565
3566         return 0;
3567 }
3568
3569 static int
3570 regex_matches(
3571         struct berval   *pat,           /* pattern to expand and match against */
3572         char            *str,           /* string to match against pattern */
3573         char            *buf,           /* buffer with $N expansion variables */
3574         int             nmatch, /* size of the matches array */
3575         regmatch_t      *matches        /* offsets in buffer for $N expansion variables */
3576 )
3577 {
3578         regex_t re;
3579         char newbuf[ACL_BUF_SIZE];
3580         struct berval bv;
3581         int     rc;
3582
3583         bv.bv_len = sizeof( newbuf ) - 1;
3584         bv.bv_val = newbuf;
3585
3586         if (str == NULL) {
3587                 str = "";
3588         };
3589
3590         string_expand( &bv, pat, buf, nmatch, matches );
3591         rc = regcomp( &re, newbuf, REG_EXTENDED|REG_ICASE );
3592         if ( rc ) {
3593                 char error[ACL_BUF_SIZE];
3594                 regerror( rc, &re, error, sizeof( error ) );
3595
3596                 Debug( LDAP_DEBUG_TRACE,
3597                     "compile( \"%s\", \"%s\") failed %s\n",
3598                         pat->bv_val, str, error );
3599                 return( 0 );
3600         }
3601
3602         rc = regexec( &re, str, 0, NULL, 0 );
3603         regfree( &re );
3604
3605         Debug( LDAP_DEBUG_TRACE,
3606             "=> regex_matches: string:   %s\n", str, 0, 0 );
3607         Debug( LDAP_DEBUG_TRACE,
3608             "=> regex_matches: rc: %d %s\n",
3609                 rc, !rc ? "matches" : "no matches", 0 );
3610         return( !rc );
3611 }
3612