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

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