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   1 /* acl.c - routines to parse and check acl's */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2003 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
  39 #ifdef LDAP_SLAPI
  40 #include "slapi/slapi.h"
  41 #endif /* LDAPI_SLAPI */
  42
  43 #define ACL_BUF_SIZE    1024    /* use most appropriate size */
  44
  45 /*
  46  * speed up compares
  47  */
  48 static struct berval
  49         aci_bv_entry            = BER_BVC("entry"),
  50         aci_bv_children         = BER_BVC("children"),
  51         aci_bv_br_entry         = BER_BVC("[entry]"),
  52         aci_bv_br_all           = BER_BVC("[all]"),
  53         aci_bv_access_id        = BER_BVC("access-id"),
  54         aci_bv_anonymous        = BER_BVC("anonymous"),
  55         aci_bv_public           = BER_BVC("public"),
  56         aci_bv_users            = BER_BVC("users"),
  57         aci_bv_self             = BER_BVC("self"),
  58         aci_bv_dnattr           = BER_BVC("dnattr"),
  59         aci_bv_group            = BER_BVC("group"),
  60         aci_bv_role             = BER_BVC("role"),
  61         aci_bv_set              = BER_BVC("set"),
  62         aci_bv_set_ref          = BER_BVC("set-ref"),
  63         aci_bv_grant            = BER_BVC("grant"),
  64         aci_bv_deny             = BER_BVC("deny"),
  65
  66         aci_bv_group_class      = BER_BVC(SLAPD_GROUP_CLASS),
  67         aci_bv_group_attr       = BER_BVC(SLAPD_GROUP_ATTR),
  68         aci_bv_role_class       = BER_BVC(SLAPD_ROLE_CLASS),
  69         aci_bv_role_attr        = BER_BVC(SLAPD_ROLE_ATTR);
  70
  71
  72 static AccessControl * acl_get(
  73         AccessControl *ac, int *count,
  74         Operation *op, Entry *e,
  75         AttributeDescription *desc,
  76         struct berval *val,
  77         int nmatches, regmatch_t *matches );
  78
  79 static slap_control_t acl_mask(
  80         AccessControl *ac, slap_mask_t *mask,
  81         Operation *op, Entry *e,
  82         AttributeDescription *desc,
  83         struct berval *val,
  84         regmatch_t *matches,
  85         int count,
  86         AccessControlState *state );
  87
  88 #ifdef SLAPD_ACI_ENABLED
  89 static int aci_mask(
  90         Operation *op, Entry *e,
  91         AttributeDescription *desc,
  92         struct berval *val,
  93         struct berval *aci,
  94         regmatch_t *matches,
  95         slap_access_t *grant,
  96         slap_access_t *deny,
  97         struct berval *scope);
  98 #endif
  99
 100 static int      regex_matches(
 101         struct berval *pat, char *str, char *buf, regmatch_t *matches);
 102 static void     string_expand(
 103         struct berval *newbuf, struct berval *pattern,
 104         char *match, regmatch_t *matches);
 105
 106 typedef struct AciSetCookie {
 107         Operation *op;
 108         Entry *e;
 109 } AciSetCookie;
 110
 111 SLAP_SET_GATHER aci_set_gather;
 112 static int aci_match_set ( struct berval *subj, Operation *op,
 113     Entry *e, int setref );
 114
 115 /*
 116  * access_allowed - check whether op->o_ndn is allowed the requested access
 117  * to entry e, attribute attr, value val.  if val is null, access to
 118  * the whole attribute is assumed (all values).
 119  *
 120  * This routine loops through all access controls and calls
 121  * acl_mask() on each applicable access control.
 122  * The loop exits when a definitive answer is reached or
 123  * or no more controls remain.
 124  *
 125  * returns:
 126  *              0       access denied
 127  *              1       access granted
 128  */
 129
 130 int
 131 access_allowed(
 132         Operation               *op,
 133         Entry           *e,
 134         AttributeDescription    *desc,
 135         struct berval   *val,
 136         slap_access_t   access,
 137         AccessControlState *state )
 138 {
 139         int                             ret = 1;
 140         int                             count;
 141         AccessControl                   *a = NULL;
 142         Backend *be;
 143         int     be_null = 0;
 144
 145 #ifdef LDAP_DEBUG
 146         char accessmaskbuf[ACCESSMASK_MAXLEN];
 147 #endif
 148         slap_mask_t mask;
 149         slap_control_t control;
 150         const char *attr;
 151         regmatch_t matches[MAXREMATCHES];
 152         int        st_same_attr = 0;
 153         int        st_initialized = 0;
 154         static AccessControlState state_init = ACL_STATE_INIT;
 155
 156         assert( e != NULL );
 157         assert( desc != NULL );
 158         assert( access > ACL_NONE );
 159
 160         attr = desc->ad_cname.bv_val;
 161
 162         assert( attr != NULL );
 163
 164         if( op && op->o_is_auth_check &&
 165                 ( access == ACL_SEARCH || access == ACL_READ ))
 166         {
 167                 access = ACL_AUTH;
 168         }
 169
 170         if( state && state->as_recorded && state->as_vd_ad==desc) {
 171                 if( state->as_recorded & ACL_STATE_RECORDED_NV &&
 172                         val == NULL )
 173                 {
 174                         return state->as_result;
 175
 176                 } else if ( state->as_recorded & ACL_STATE_RECORDED_VD &&
 177                         val != NULL && state->as_vd_acl == NULL )
 178                 {
 179                         return state->as_result;
 180                 }
 181                 st_same_attr = 1;
 182         }
 183
 184         if( state ) {
 185                 state->as_vd_ad=desc;
 186         }
 187
 188 #ifdef NEW_LOGGING
 189         LDAP_LOG( ACL, ENTRY,
 190                 "access_allowed: %s access to \"%s\" \"%s\" requested\n",
 191                 access2str( access ), e->e_dn, attr );
 192 #else
 193         Debug( LDAP_DEBUG_ACL,
 194                 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
 195             access2str( access ), e->e_dn, attr );
 196 #endif
 197
 198         if ( op == NULL ) {
 199                 /* no-op call */
 200                 goto done;
 201         }
 202
 203 #ifdef LDAP_SLAPI
 204         if ( op->o_pb &&
 205                 !slapi_int_access_allowed( op, e, desc, val, access, state )) {
 206                 /* ACL plugin denied access */
 207                 goto done;
 208         }
 209 #endif /* LDAP_SLAPI */
 210
 211         be = op->o_bd;
 212         if ( be == NULL ) {
 213                 be = &backends[0];
 214                 be_null = 1;
 215                 op->o_bd = be;
 216         }
 217         assert( be != NULL );
 218
 219         /* grant database root access */
 220         if ( be != NULL && be_isroot( be, &op->o_ndn ) ) {
 221 #ifdef NEW_LOGGING
 222                 LDAP_LOG( ACL, INFO,
 223                         "access_allowed: conn %lu root access granted\n",
 224                         op->o_connid, 0, 0 );
 225 #else
 226                 Debug( LDAP_DEBUG_ACL,
 227                     "<= root access granted\n",
 228                         0, 0, 0 );
 229 #endif
 230                 goto done;
 231         }
 232
 233         /*
 234          * no-user-modification operational attributes are ignored
 235          * by ACL_WRITE checking as any found here are not provided
 236          * by the user
 237          */
 238         if ( access >= ACL_WRITE && is_at_no_user_mod( desc->ad_type )
 239                 && desc != slap_schema.si_ad_entry
 240                 && desc != slap_schema.si_ad_children )
 241         {
 242 #ifdef NEW_LOGGING
 243                 LDAP_LOG( ACL, DETAIL1,
 244                         "access_allowed: conn %lu NoUserMod Operational attribute: %s "
 245                         "access granted\n", op->o_connid, attr , 0 );
 246 #else
 247                 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
 248                         " %s access granted\n",
 249                         attr, 0, 0 );
 250 #endif
 251                 goto done;
 252         }
 253
 254         /* use backend default access if no backend acls */
 255         if( be != NULL && be->be_acl == NULL ) {
 256 #ifdef NEW_LOGGING
 257                 LDAP_LOG( ACL, DETAIL1,
 258                         "access_allowed: backend default %s access %s to \"%s\"\n",
 259                     access2str( access ),
 260                     be->be_dfltaccess >= access ? "granted" : "denied",
 261                         op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" );
 262 #else
 263                 Debug( LDAP_DEBUG_ACL,
 264                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
 265                         access2str( access ),
 266                         be->be_dfltaccess >= access ? "granted" : "denied",
 267                         op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" );
 268 #endif
 269                 ret = be->be_dfltaccess >= access;
 270                 goto done;
 271
 272 #ifdef notdef
 273         /* be is always non-NULL */
 274         /* use global default access if no global acls */
 275         } else if ( be == NULL && global_acl == NULL ) {
 276 #ifdef NEW_LOGGING
 277                 LDAP_LOG( ACL, DETAIL1,
 278                         "access_allowed: global default %s access %s to \"%s\"\n",
 279                     access2str( access ),
 280                     global_default_access >= access ? "granted" : "denied",
 281                         op->o_dn.bv_val );
 282 #else
 283                 Debug( LDAP_DEBUG_ACL,
 284                         "=> access_allowed: global default %s access %s to \"%s\"\n",
 285                         access2str( access ),
 286                         global_default_access >= access ? "granted" : "denied", op->o_dn.bv_val );
 287 #endif
 288                 ret = global_default_access >= access;
 289                 goto done;
 290 #endif
 291         }
 292
 293         ret = 0;
 294         control = ACL_BREAK;
 295
 296         if( st_same_attr ) {
 297                 assert( state->as_vd_acl != NULL );
 298
 299                 a = state->as_vd_acl;
 300                 mask = state->as_vd_acl_mask;
 301                 count = state->as_vd_acl_count;
 302                 AC_MEMCPY( matches, state->as_vd_acl_matches, sizeof(matches) );
 303                 goto vd_access;
 304
 305         } else {
 306                 if ( state ) state->as_vi_acl = NULL;
 307                 a = NULL;
 308                 ACL_INIT(mask);
 309                 count = 0;
 310                 memset(matches, '\0', sizeof(matches));
 311         }
 312
 313         while((a = acl_get( a, &count, op, e, desc, val,
 314                 MAXREMATCHES, matches )) != NULL)
 315         {
 316                 int i;
 317
 318                 for (i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++) {
 319 #ifdef NEW_LOGGING
 320                         LDAP_LOG( ACL, DETAIL1,
 321                                 "access_allowed: match[%d]:  %d %d ",
 322                             i, (int)matches[i].rm_so, (int)matches[i].rm_eo );
 323 #else
 324                         Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
 325                             (int)matches[i].rm_so, (int)matches[i].rm_eo );
 326 #endif
 327                         if( matches[i].rm_so <= matches[0].rm_eo ) {
 328                                 int n;
 329                                 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++) {
 330                                         Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
 331                                 }
 332                         }
 333 #ifdef NEW_LOGGING
 334                         LDAP_LOG( ACL, ARGS, "\n" , 0, 0, 0 );
 335 #else
 336                         Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
 337 #endif
 338                 }
 339
 340                 if (state) {
 341                         if (state->as_vi_acl == a && (state->as_recorded & ACL_STATE_RECORDED_NV)) {
 342                                 Debug( LDAP_DEBUG_ACL, "access_allowed: result from state (%s)\n", attr, 0, 0 );
 343                                 ret = state->as_result;
 344                                 goto done;
 345                         } else if (!st_initialized) {
 346                                 Debug( LDAP_DEBUG_ACL, "access_allowed: no res from state (%s)\n", attr, 0, 0);
 347                             *state = state_init;
 348                                 state->as_vd_ad=desc;
 349                                 st_initialized=1;
 350                         }
 351                 }
 352
 353 vd_access:
 354                 control = acl_mask( a, &mask, op,
 355                         e, desc, val, matches, count, state );
 356
 357                 if ( control != ACL_BREAK ) {
 358                         break;
 359                 }
 360
 361                 memset(matches, '\0', sizeof(matches));
 362         }
 363
 364         if ( ACL_IS_INVALID( mask ) ) {
 365 #ifdef NEW_LOGGING
 366                 LDAP_LOG( ACL, DETAIL1,
 367                         "access_allowed: conn %lu \"%s\" (%s) invalid!\n",
 368                     op->o_connid, e->e_dn, attr );
 369 #else
 370                 Debug( LDAP_DEBUG_ACL,
 371                         "=> access_allowed: \"%s\" (%s) invalid!\n",
 372                         e->e_dn, attr, 0 );
 373 #endif
 374                 ACL_INIT(mask);
 375
 376         } else if ( control == ACL_BREAK ) {
 377 #ifdef NEW_LOGGING
 378                 LDAP_LOG( ACL, DETAIL1,
 379                         "access_allowed: conn %lu        no more rules\n", op->o_connid, 0,0 );
 380 #else
 381                 Debug( LDAP_DEBUG_ACL,
 382                         "=> access_allowed: no more rules\n", 0, 0, 0);
 383 #endif
 384
 385                 goto done;
 386         }
 387
 388 #ifdef NEW_LOGGING
 389         LDAP_LOG( ACL, ENTRY,
 390                 "access_allowed: %s access %s by %s\n",
 391                 access2str( access ), ACL_GRANT( mask, access ) ? "granted" : "denied",
 392                 accessmask2str( mask, accessmaskbuf ) );
 393 #else
 394         Debug( LDAP_DEBUG_ACL,
 395                 "=> access_allowed: %s access %s by %s\n",
 396                 access2str( access ),
 397                 ACL_GRANT(mask, access) ? "granted" : "denied",
 398                 accessmask2str( mask, accessmaskbuf ) );
 399 #endif
 400
 401         ret = ACL_GRANT(mask, access);
 402
 403 done:
 404         if( state != NULL ) {
 405                 /* If not value-dependent, save ACL in case of more attrs */
 406                 if ( !(state->as_recorded & ACL_STATE_RECORDED_VD) ) {
 407                         state->as_vi_acl = a;
 408                         state->as_result = ret;
 409                 }
 410                 state->as_recorded |= ACL_STATE_RECORDED;
 411         }
 412         if (be_null) op->o_bd = NULL;
 413         return ret;
 414 }
 415
 416 /*
 417  * acl_get - return the acl applicable to entry e, attribute
 418  * attr.  the acl returned is suitable for use in subsequent calls to
 419  * acl_access_allowed().
 420  */
 421
 422 static AccessControl *
 423 acl_get(
 424         AccessControl *a,
 425         int                     *count,
 426         Operation       *op,
 427         Entry           *e,
 428         AttributeDescription *desc,
 429         struct berval   *val,
 430         int                     nmatch,
 431         regmatch_t      *matches )
 432 {
 433         const char *attr;
 434         int dnlen, patlen;
 435
 436         assert( e != NULL );
 437         assert( count != NULL );
 438         assert( desc != NULL );
 439
 440         attr = desc->ad_cname.bv_val;
 441
 442         assert( attr != NULL );
 443
 444         if( a == NULL ) {
 445                 if( op->o_bd == NULL ) {
 446                         a = global_acl;
 447                 } else {
 448                         a = op->o_bd->be_acl;
 449                 }
 450
 451                 assert( a != NULL );
 452
 453         } else {
 454                 a = a->acl_next;
 455         }
 456
 457         dnlen = e->e_nname.bv_len;
 458
 459         for ( ; a != NULL; a = a->acl_next ) {
 460                 (*count) ++;
 461
 462                 if ( a->acl_dn_pat.bv_len || ( a->acl_dn_style != ACL_STYLE_REGEX )) {
 463                         if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
 464 #ifdef NEW_LOGGING
 465                                 LDAP_LOG( ACL, DETAIL1,
 466                                         "acl_get: dnpat [%d] %s nsub: %d\n",
 467                                         *count, a->acl_dn_pat.bv_val,
 468                                         (int) a->acl_dn_re.re_nsub );
 469 #else
 470                                 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
 471                                         *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub );
 472 #endif
 473                                 if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
 474                                         continue;
 475
 476                         } else {
 477 #ifdef NEW_LOGGING
 478                                 LDAP_LOG( ACL, DETAIL1, "acl_get: dn [%d] %s\n",
 479                                            *count, a->acl_dn_pat.bv_val, 0 );
 480 #else
 481                                 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
 482                                         *count, a->acl_dn_pat.bv_val, 0 );
 483 #endif
 484                                 patlen = a->acl_dn_pat.bv_len;
 485                                 if ( dnlen < patlen )
 486                                         continue;
 487
 488                                 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
 489                                         /* base dn -- entire object DN must match */
 490                                         if ( dnlen != patlen )
 491                                                 continue;
 492
 493                                 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
 494                                         int rdnlen = -1;
 495
 496                                         if ( dnlen <= patlen )
 497                                                 continue;
 498
 499                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 500                                                 continue;
 501
 502                                         rdnlen = dn_rdnlen( NULL, &e->e_nname );
 503                                         if ( rdnlen != dnlen - patlen - 1 )
 504                                                 continue;
 505
 506                                 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
 507                                         if ( dnlen > patlen && !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 508                                                 continue;
 509
 510                                 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
 511                                         if ( dnlen <= patlen )
 512                                                 continue;
 513                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 514                                                 continue;
 515                                 }
 516
 517                                 if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
 518                                         continue;
 519                         }
 520
 521 #ifdef NEW_LOGGING
 522                         LDAP_LOG( ACL, DETAIL1,
 523                                 "acl_get: [%d] matched\n", *count, 0, 0 );
 524 #else
 525                         Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
 526                                 *count, 0, 0 );
 527 #endif
 528                 }
 529
 530                 if ( a->acl_filter != NULL ) {
 531                         ber_int_t rc = test_filter( NULL, e, a->acl_filter );
 532                         if ( rc != LDAP_COMPARE_TRUE ) {
 533                                 continue;
 534                         }
 535                 }
 536
 537 #ifdef NEW_LOGGING
 538                 LDAP_LOG( ACL, DETAIL1,
 539                         "acl_get: [%d] check attr %s\n", *count, attr ,0 );
 540 #else
 541                 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] check attr %s\n",
 542                        *count, attr, 0);
 543 #endif
 544                 if ( a->acl_attrs == NULL ||
 545                         ad_inlist( desc, a->acl_attrs ) )
 546                 {
 547 #ifdef NEW_LOGGING
 548                         LDAP_LOG( ACL, DETAIL1,
 549                                 "acl_get:  [%d] acl %s attr: %s\n", *count, e->e_dn, attr );
 550 #else
 551                         Debug( LDAP_DEBUG_ACL,
 552                                 "<= acl_get: [%d] acl %s attr: %s\n",
 553                                 *count, e->e_dn, attr );
 554 #endif
 555                         return a;
 556                 }
 557                 matches[0].rm_so = matches[0].rm_eo = -1;
 558         }
 559
 560 #ifdef NEW_LOGGING
 561         LDAP_LOG( ACL, RESULTS, "acl_get: done.\n", 0, 0, 0 );
 562 #else
 563         Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
 564 #endif
 565         return( NULL );
 566 }
 567
 568 /*
 569  * Record value-dependent access control state
 570  */
 571 #define ACL_RECORD_VALUE_STATE do { \
 572                 if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) { \
 573                         state->as_recorded |= ACL_STATE_RECORDED_VD; \
 574                         state->as_vd_acl = a; \
 575                         AC_MEMCPY( state->as_vd_acl_matches, matches, \
 576                                 sizeof( state->as_vd_acl_matches )) ; \
 577                         state->as_vd_acl_count = count; \
 578                         state->as_vd_access = b; \
 579                         state->as_vd_access_count = i; \
 580                 } \
 581         } while( 0 )
 582
 583 /*
 584  * acl_mask - modifies mask based upon the given acl and the
 585  * requested access to entry e, attribute attr, value val.  if val
 586  * is null, access to the whole attribute is assumed (all values).
 587  *
 588  * returns      0       access NOT allowed
 589  *              1       access allowed
 590  */
 591
 592 static slap_control_t
 593 acl_mask(
 594         AccessControl   *a,
 595         slap_mask_t *mask,
 596         Operation       *op,
 597         Entry           *e,
 598         AttributeDescription *desc,
 599         struct berval   *val,
 600         regmatch_t      *matches,
 601         int     count,
 602         AccessControlState *state )
 603 {
 604         int             i, odnlen, patlen;
 605         Access  *b;
 606 #ifdef LDAP_DEBUG
 607         char accessmaskbuf[ACCESSMASK_MAXLEN];
 608         char accessmaskbuf1[ACCESSMASK_MAXLEN];
 609 #endif
 610         const char *attr;
 611
 612         assert( a != NULL );
 613         assert( mask != NULL );
 614         assert( desc != NULL );
 615
 616         attr = desc->ad_cname.bv_val;
 617
 618         assert( attr != NULL );
 619
 620 #ifdef NEW_LOGGING
 621         LDAP_LOG( ACL, ENTRY,
 622                 "acl_mask: conn %lu  access to entry \"%s\", attr \"%s\" requested\n",
 623                 op->o_connid, e->e_dn, attr );
 624
 625         LDAP_LOG( ACL, ARGS,
 626                 " to %s by \"%s\", (%s) \n", val ? "value" : "all values",
 627                 op->o_ndn.bv_val ? op->o_ndn.bv_val : "",
 628                 accessmask2str( *mask, accessmaskbuf ) );
 629 #else
 630         Debug( LDAP_DEBUG_ACL,
 631                 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
 632                 e->e_dn, attr, 0 );
 633
 634         Debug( LDAP_DEBUG_ACL,
 635                 "=> acl_mask: to %s by \"%s\", (%s) \n",
 636                 val ? "value" : "all values",
 637                 op->o_ndn.bv_val ?  op->o_ndn.bv_val : "",
 638                 accessmask2str( *mask, accessmaskbuf ) );
 639 #endif
 640
 641         /* Is this ACL only for a specific value? */
 642         if ( a->acl_attrval.bv_len ) {
 643                 if ( state && !state->as_vd_acl ) {
 644                         state->as_vd_acl = a;
 645                         state->as_vd_access = a->acl_access;
 646                         state->as_vd_access_count = 1;
 647                 }
 648                 if ( val == NULL ) {
 649                         return ACL_BREAK;
 650                 }
 651                 if ( a->acl_attrval_style == ACL_STYLE_REGEX ) {
 652 #ifdef NEW_LOGGING
 653                         LDAP_LOG( ACL, DETAIL1,
 654                                 "acl_get: valpat %s\n",
 655                                 a->acl_attrval.bv_val, 0, 0 );
 656 #else
 657                         Debug( LDAP_DEBUG_ACL,
 658                                 "acl_get: valpat %s\n",
 659                                 a->acl_attrval.bv_val, 0, 0 );
 660 #endif
 661                         if (regexec(&a->acl_attrval_re, val->bv_val, 0, NULL, 0))
 662                                 return ACL_BREAK;
 663                 } else {
 664                         int match = 0;
 665                         const char *text;
 666 #ifdef NEW_LOGGING
 667                         LDAP_LOG( ACL, DETAIL1,
 668                                 "acl_get: val %s\n",
 669                                 a->acl_attrval.bv_val, 0, 0 );
 670 #else
 671                         Debug( LDAP_DEBUG_ACL,
 672                                 "acl_get: val %s\n",
 673                                 a->acl_attrval.bv_val, 0, 0 );
 674 #endif
 675                         if (value_match( &match, desc,
 676                                 desc->ad_type->sat_equality, 0,
 677                                 val, &a->acl_attrval, &text ) != LDAP_SUCCESS ||
 678                                         match )
 679                                 return ACL_BREAK;
 680                 }
 681         }
 682
 683         if( state && ( state->as_recorded & ACL_STATE_RECORDED_VD )
 684                 && state->as_vd_acl == a )
 685         {
 686                 b = state->as_vd_access;
 687                 i = state->as_vd_access_count;
 688
 689         } else {
 690                 b = a->acl_access;
 691                 i = 1;
 692         }
 693
 694         for ( ; b != NULL; b = b->a_next, i++ ) {
 695                 slap_mask_t oldmask, modmask;
 696
 697                 ACL_INVALIDATE( modmask );
 698
 699                 /* AND <who> clauses */
 700                 if ( b->a_dn_pat.bv_len != 0 ) {
 701 #ifdef NEW_LOGGING
 702                         LDAP_LOG( ACL, DETAIL1,
 703                                 "acl_mask: conn %lu  check a_dn_pat: %s\n",
 704                                 op->o_connid, b->a_dn_pat.bv_val ,0 );
 705 #else
 706                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
 707                                 b->a_dn_pat.bv_val, 0, 0);
 708 #endif
 709                         /*
 710                          * if access applies to the entry itself, and the
 711                          * user is bound as somebody in the same namespace as
 712                          * the entry, OR the given dn matches the dn pattern
 713                          */
 714                         if ( bvmatch( &b->a_dn_pat, &aci_bv_anonymous ) ) {
 715                                 if ( op->o_ndn.bv_len != 0 ) {
 716                                         continue;
 717                                 }
 718
 719                         } else if ( bvmatch( &b->a_dn_pat, &aci_bv_users ) ) {
 720                                 if ( op->o_ndn.bv_len == 0 ) {
 721                                         continue;
 722                                 }
 723
 724                         } else if ( bvmatch( &b->a_dn_pat, &aci_bv_self ) ) {
 725                                 if ( op->o_ndn.bv_len == 0 ) {
 726                                         continue;
 727                                 }
 728
 729                                 if ( e->e_dn == NULL || !dn_match( &e->e_nname, &op->o_ndn ) ) {
 730                                         continue;
 731                                 }
 732
 733                         } else if ( b->a_dn_style == ACL_STYLE_REGEX ) {
 734                                 if ( !ber_bvccmp( &b->a_dn_pat, '*' ) ) {
 735                                         int ret = regex_matches( &b->a_dn_pat,
 736                                                 op->o_ndn.bv_val, e->e_ndn, matches );
 737
 738                                         if( ret == 0 ) {
 739                                                 continue;
 740                                         }
 741                                 }
 742
 743                         } else {
 744                                 struct berval pat;
 745                                 int got_match = 0;
 746
 747                                 if ( e->e_dn == NULL )
 748                                         continue;
 749
 750                                 if ( b->a_dn_expand ) {
 751                                         struct berval bv;
 752                                         char buf[ACL_BUF_SIZE];
 753
 754                                         bv.bv_len = sizeof( buf ) - 1;
 755                                         bv.bv_val = buf;
 756
 757                                         string_expand(&bv, &b->a_dn_pat,
 758                                                         e->e_ndn, matches);
 759                                         if ( dnNormalize(0, NULL, NULL, &bv, &pat, op->o_tmpmemctx ) != LDAP_SUCCESS ) {
 760                                                 /* did not expand to a valid dn */
 761                                                 continue;
 762                                         }
 763                                 } else {
 764                                         pat = b->a_dn_pat;
 765                                 }
 766
 767                                 patlen = pat.bv_len;
 768                                 odnlen = op->o_ndn.bv_len;
 769                                 if ( odnlen < patlen ) {
 770                                         goto dn_match_cleanup;
 771
 772                                 }
 773
 774                                 if ( b->a_dn_style == ACL_STYLE_BASE ) {
 775                                         /* base dn -- entire object DN must match */
 776                                         if ( odnlen != patlen ) {
 777                                                 goto dn_match_cleanup;
 778                                         }
 779
 780                                 } else if ( b->a_dn_style == ACL_STYLE_ONE ) {
 781                                         int rdnlen = -1;
 782
 783                                         if ( odnlen <= patlen ) {
 784                                                 goto dn_match_cleanup;
 785                                         }
 786
 787                                         if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) {
 788                                                 goto dn_match_cleanup;
 789                                         }
 790
 791                                         rdnlen = dn_rdnlen( NULL, &op->o_ndn );
 792                                         if ( rdnlen != odnlen - patlen - 1 ) {
 793                                                 goto dn_match_cleanup;
 794                                         }
 795
 796                                 } else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) {
 797                                         if ( odnlen > patlen && !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) {
 798                                                 goto dn_match_cleanup;
 799                                         }
 800
 801                                 } else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) {
 802                                         if ( odnlen <= patlen ) {
 803                                                 goto dn_match_cleanup;
 804                                         }
 805
 806                                         if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) {
 807                                                 goto dn_match_cleanup;
 808                                         }
 809                                 }
 810
 811                                 got_match = !strcmp( pat.bv_val, op->o_ndn.bv_val + odnlen - patlen );
 812
 813 dn_match_cleanup:;
 814                                 if ( pat.bv_val != b->a_dn_pat.bv_val ) {
 815                                         free( pat.bv_val );
 816                                 }
 817
 818                                 if ( !got_match ) {
 819                                         continue;
 820                                 }
 821                         }
 822                 }
 823
 824                 if ( b->a_sockurl_pat.bv_len ) {
 825                         if ( ! op->o_conn->c_listener ) {
 826                                 continue;
 827                         }
 828 #ifdef NEW_LOGGING
 829                         LDAP_LOG( ACL, DETAIL1,
 830                                    "acl_mask: conn %lu  check a_sockurl_pat: %s\n",
 831                                    op->o_connid, b->a_sockurl_pat.bv_val , 0 );
 832 #else
 833                         Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
 834                                 b->a_sockurl_pat.bv_val, 0, 0 );
 835 #endif
 836
 837                         if ( !ber_bvccmp( &b->a_sockurl_pat, '*' ) ) {
 838                                 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
 839                                         if (!regex_matches( &b->a_sockurl_pat, op->o_conn->c_listener_url.bv_val,
 840                                                         e->e_ndn, matches ) )
 841                                         {
 842                                                 continue;
 843                                         }
 844                                 } else {
 845                                         if ( ber_bvstrcasecmp( &b->a_sockurl_pat, &op->o_conn->c_listener_url ) != 0 )
 846                                                 continue;
 847                                 }
 848                         }
 849                 }
 850
 851                 if ( b->a_domain_pat.bv_len ) {
 852                         if ( !op->o_conn->c_peer_domain.bv_val ) {
 853                                 continue;
 854                         }
 855 #ifdef NEW_LOGGING
 856                         LDAP_LOG( ACL, DETAIL1,
 857                                    "acl_mask: conn %lu  check a_domain_pat: %s\n",
 858                                    op->o_connid, b->a_domain_pat.bv_val , 0 );
 859 #else
 860                         Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
 861                                 b->a_domain_pat.bv_val, 0, 0 );
 862 #endif
 863                         if ( !ber_bvccmp( &b->a_domain_pat, '*' ) ) {
 864                                 if ( b->a_domain_style == ACL_STYLE_REGEX) {
 865                                         if (!regex_matches( &b->a_domain_pat, op->o_conn->c_peer_domain.bv_val,
 866                                                         e->e_ndn, matches ) )
 867                                         {
 868                                                 continue;
 869                                         }
 870                                 } else {
 871                                         char buf[ACL_BUF_SIZE];
 872
 873                                         struct berval   cmp = op->o_conn->c_peer_domain;
 874                                         struct berval   pat = b->a_domain_pat;
 875
 876                                         if ( b->a_domain_expand ) {
 877                                                 struct berval bv;
 878
 879                                                 bv.bv_len = sizeof(buf) - 1;
 880                                                 bv.bv_val = buf;
 881
 882                                                 string_expand(&bv, &b->a_domain_pat, e->e_ndn, matches);
 883                                                 pat = bv;
 884                                         }
 885
 886                                         if ( b->a_domain_style == ACL_STYLE_SUBTREE ) {
 887                                                 int offset = cmp.bv_len - pat.bv_len;
 888                                                 if ( offset < 0 ) {
 889                                                         continue;
 890                                                 }
 891
 892                                                 if ( offset == 1 || ( offset > 1 && cmp.bv_val[ offset - 1 ] != '.' ) ) {
 893                                                         continue;
 894                                                 }
 895
 896                                                 /* trim the domain */
 897                                                 cmp.bv_val = &cmp.bv_val[ offset ];
 898                                                 cmp.bv_len -= offset;
 899                                         }
 900
 901                                         if ( ber_bvstrcasecmp( &pat, &cmp ) != 0 ) {
 902                                                 continue;
 903                                         }
 904                                 }
 905                         }
 906                 }
 907
 908                 if ( b->a_peername_pat.bv_len ) {
 909                         if ( !op->o_conn->c_peer_name.bv_val ) {
 910                                 continue;
 911                         }
 912 #ifdef NEW_LOGGING
 913                         LDAP_LOG( ACL, DETAIL1,
 914                                    "acl_mask: conn %lu  check a_peername_path: %s\n",
 915                                    op->o_connid, b->a_peername_pat.bv_val , 0 );
 916 #else
 917                         Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
 918                                 b->a_peername_pat.bv_val, 0, 0 );
 919 #endif
 920                         if ( !ber_bvccmp( &b->a_peername_pat, '*' ) ) {
 921                                 if ( b->a_peername_style == ACL_STYLE_REGEX) {
 922                                         if (!regex_matches( &b->a_peername_pat, op->o_conn->c_peer_name.bv_val,
 923                                                         e->e_ndn, matches ) )
 924                                         {
 925                                                 continue;
 926                                         }
 927                                 } else {
 928                                         if ( ber_bvstrcasecmp( &b->a_peername_pat, &op->o_conn->c_peer_name ) != 0 )
 929                                                 continue;
 930                                 }
 931                         }
 932                 }
 933
 934                 if ( b->a_sockname_pat.bv_len ) {
 935                         if ( !op->o_conn->c_sock_name.bv_val ) {
 936                                 continue;
 937                         }
 938 #ifdef NEW_LOGGING
 939                         LDAP_LOG( ACL, DETAIL1,
 940                                    "acl_mask: conn %lu  check a_sockname_path: %s\n",
 941                                    op->o_connid, b->a_sockname_pat.bv_val , 0 );
 942 #else
 943                         Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
 944                                 b->a_sockname_pat.bv_val, 0, 0 );
 945 #endif
 946                         if ( !ber_bvccmp( &b->a_sockname_pat, '*' ) ) {
 947                                 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
 948                                         if (!regex_matches( &b->a_sockname_pat, op->o_conn->c_sock_name.bv_val,
 949                                                         e->e_ndn, matches ) )
 950                                         {
 951                                                 continue;
 952                                         }
 953                                 } else {
 954                                         if ( ber_bvstrcasecmp( &b->a_sockname_pat, &op->o_conn->c_sock_name ) != 0 )
 955                                                 continue;
 956                                 }
 957                         }
 958                 }
 959
 960                 if ( b->a_dn_at != NULL ) {
 961                         Attribute       *at;
 962                         struct berval   bv;
 963                         int rc, match = 0;
 964                         const char *text;
 965                         const char *attr = b->a_dn_at->ad_cname.bv_val;
 966
 967                         assert( attr != NULL );
 968
 969                         if ( op->o_ndn.bv_len == 0 ) {
 970                                 continue;
 971                         }
 972
 973 #ifdef NEW_LOGGING
 974                         LDAP_LOG( ACL, DETAIL1,
 975                                    "acl_mask: conn %lu  check a_dn_pat: %s\n",
 976                                    op->o_connid, attr , 0 );
 977 #else
 978                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
 979                                 attr, 0, 0);
 980 #endif
 981                         bv = op->o_ndn;
 982
 983                         /* see if asker is listed in dnattr */
 984                         for( at = attrs_find( e->e_attrs, b->a_dn_at );
 985                                 at != NULL;
 986                                 at = attrs_find( at->a_next, b->a_dn_at ) )
 987                         {
 988                                 if( value_find_ex( b->a_dn_at,
 989                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 990                                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 991                                         at->a_nvals,
 992                                         &bv, op->o_tmpmemctx ) == 0 )
 993                                 {
 994                                         /* found it */
 995                                         match = 1;
 996                                         break;
 997                                 }
 998                         }
 999
1000                         if( match ) {
1001                                 /* have a dnattr match. if this is a self clause then
1002                                  * the target must also match the op dn.
1003                                  */
1004                                 if ( b->a_dn_self ) {
1005                                         /* check if the target is an attribute. */
1006                                         if ( val == NULL ) continue;
1007
1008                                         /* target is attribute, check if the attribute value
1009                                          * is the op dn.
1010                                          */
1011                                         rc = value_match( &match, b->a_dn_at,
1012                                                 b->a_dn_at->ad_type->sat_equality, 0,
1013                                                 val, &bv, &text );
1014                                         /* on match error or no match, fail the ACL clause */
1015                                         if (rc != LDAP_SUCCESS || match != 0 )
1016                                                 continue;
1017                                 }
1018                         } else {
1019                                 /* no dnattr match, check if this is a self clause */
1020                                 if ( ! b->a_dn_self )
1021                                         continue;
1022
1023                                 ACL_RECORD_VALUE_STATE;
1024
1025                                 /* this is a self clause, check if the target is an
1026                                  * attribute.
1027                                  */
1028                                 if ( val == NULL )
1029                                         continue;
1030
1031                                 /* target is attribute, check if the attribute value
1032                                  * is the op dn.
1033                                  */
1034                                 rc = value_match( &match, b->a_dn_at,
1035                                         b->a_dn_at->ad_type->sat_equality, 0,
1036                                         val, &bv, &text );
1037
1038                                 /* on match error or no match, fail the ACL clause */
1039                                 if (rc != LDAP_SUCCESS || match != 0 )
1040                                         continue;
1041                         }
1042                 }
1043
1044                 if ( b->a_group_pat.bv_len ) {
1045                         struct berval bv;
1046                         struct berval ndn = { 0, NULL };
1047                         int rc;
1048
1049                         if ( op->o_ndn.bv_len == 0 ) {
1050                                 continue;
1051                         }
1052
1053                         /* b->a_group is an unexpanded entry name, expanded it should be an
1054                          * entry with objectclass group* and we test to see if odn is one of
1055                          * the values in the attribute group
1056                          */
1057                         /* see if asker is listed in dnattr */
1058                         if ( b->a_group_style == ACL_STYLE_REGEX ) {
1059                                 char buf[ACL_BUF_SIZE];
1060                                 bv.bv_len = sizeof(buf) - 1;
1061                                 bv.bv_val = buf;
1062
1063                                 string_expand( &bv, &b->a_group_pat, e->e_ndn, matches );
1064                                 if ( dnNormalize( 0, NULL, NULL, &bv, &ndn, op->o_tmpmemctx ) != LDAP_SUCCESS ) {
1065                                         /* did not expand to a valid dn */
1066                                         continue;
1067                                 }
1068
1069                                 bv = ndn;
1070
1071                         } else {
1072                                 bv = b->a_group_pat;
1073                         }
1074
1075                         rc = backend_group( op, e, &bv, &op->o_ndn,
1076                                 b->a_group_oc, b->a_group_at );
1077
1078                         if ( ndn.bv_val ) free( ndn.bv_val );
1079
1080                         if ( rc != 0 ) {
1081                                 continue;
1082                         }
1083                 }
1084
1085                 if ( b->a_set_pat.bv_len != 0 ) {
1086                         struct berval bv;
1087                         char buf[ACL_BUF_SIZE];
1088                         if( b->a_set_style == ACL_STYLE_REGEX ){
1089                                 bv.bv_len = sizeof(buf) - 1;
1090                                 bv.bv_val = buf;
1091                                 string_expand( &bv, &b->a_set_pat, e->e_ndn, matches );
1092                         }else{
1093                                 bv = b->a_set_pat;
1094                         }
1095                         if (aci_match_set( &bv, op, e, 0 ) == 0) {
1096                                 continue;
1097                         }
1098                 }
1099
1100                 if ( b->a_authz.sai_ssf ) {
1101 #ifdef NEW_LOGGING
1102                         LDAP_LOG( ACL, DETAIL1,
1103                                 "acl_mask: conn %lu  check a_authz.sai_ssf: ACL %u > OP %u\n",
1104                                 op->o_connid, b->a_authz.sai_ssf, op->o_ssf  );
1105 #else
1106                         Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
1107                                 b->a_authz.sai_ssf, op->o_ssf, 0 );
1108 #endif
1109                         if ( b->a_authz.sai_ssf >  op->o_ssf ) {
1110                                 continue;
1111                         }
1112                 }
1113
1114                 if ( b->a_authz.sai_transport_ssf ) {
1115 #ifdef NEW_LOGGING
1116                         LDAP_LOG( ACL, DETAIL1,
1117                                 "acl_mask: conn %lu  check a_authz.sai_transport_ssf: "
1118                                 "ACL %u > OP %u\n",
1119                                 op->o_connid, b->a_authz.sai_transport_ssf,
1120                                 op->o_transport_ssf  );
1121 #else
1122                         Debug( LDAP_DEBUG_ACL,
1123                                 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
1124                                 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
1125 #endif
1126                         if ( b->a_authz.sai_transport_ssf >  op->o_transport_ssf ) {
1127                                 continue;
1128                         }
1129                 }
1130
1131                 if ( b->a_authz.sai_tls_ssf ) {
1132 #ifdef NEW_LOGGING
1133                         LDAP_LOG( ACL, DETAIL1,
1134                                 "acl_mask: conn %lu  check a_authz.sai_tls_ssf: ACL %u > "
1135                                 "OP %u\n",
1136                                 op->o_connid, b->a_authz.sai_tls_ssf, op->o_tls_ssf  );
1137 #else
1138                         Debug( LDAP_DEBUG_ACL,
1139                                 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
1140                                 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
1141 #endif
1142                         if ( b->a_authz.sai_tls_ssf >  op->o_tls_ssf ) {
1143                                 continue;
1144                         }
1145                 }
1146
1147                 if ( b->a_authz.sai_sasl_ssf ) {
1148 #ifdef NEW_LOGGING
1149                         LDAP_LOG( ACL, DETAIL1,
1150                            "acl_mask: conn %lu check a_authz.sai_sasl_ssf: "
1151                            "ACL %u > OP %u\n",
1152                                 op->o_connid, b->a_authz.sai_sasl_ssf, op->o_sasl_ssf );
1153 #else
1154                         Debug( LDAP_DEBUG_ACL,
1155                                 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
1156                                 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
1157 #endif
1158                         if ( b->a_authz.sai_sasl_ssf >  op->o_sasl_ssf ) {
1159                                 continue;
1160                         }
1161                 }
1162
1163 #ifdef SLAPD_ACI_ENABLED
1164                 if ( b->a_aci_at != NULL ) {
1165                         Attribute       *at;
1166                         slap_access_t grant, deny, tgrant, tdeny;
1167                         struct berval parent_ndn, old_parent_ndn;
1168                         BerVarray bvals = NULL;
1169                         int ret,stop;
1170
1171                         /* this case works different from the others above.
1172                          * since aci's themselves give permissions, we need
1173                          * to first check b->a_access_mask, the ACL's access level.
1174                          */
1175
1176                         if ( e->e_nname.bv_len == 0 ) {
1177                                 /* no ACIs in the root DSE */
1178                                 continue;
1179                         }
1180
1181                         /* first check if the right being requested
1182                          * is allowed by the ACL clause.
1183                          */
1184                         if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
1185                                 continue;
1186                         }
1187                         /* start out with nothing granted, nothing denied */
1188                         ACL_INIT(tgrant);
1189                         ACL_INIT(tdeny);
1190
1191                         /* get the aci attribute */
1192                         at = attr_find( e->e_attrs, b->a_aci_at );
1193                         if ( at != NULL ) {
1194                                 ACL_RECORD_VALUE_STATE;
1195                                 /* the aci is an multi-valued attribute.  The
1196                                 * rights are determined by OR'ing the individual
1197                                 * rights given by the acis.
1198                                 */
1199                                 for ( i = 0; at->a_vals[i].bv_val != NULL; i++ ) {
1200                                         if (aci_mask( op,
1201                                                 e, desc, val,
1202                                                 &at->a_nvals[i],
1203                                                 matches, &grant, &deny,  &aci_bv_entry ) != 0)
1204                                         {
1205                                                 tgrant |= grant;
1206                                                 tdeny |= deny;
1207                                         }
1208                                 }
1209                                 Debug(LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n",
1210                                           accessmask2str(tgrant,accessmaskbuf),
1211                                           accessmask2str(tdeny, accessmaskbuf1), 0);
1212
1213                         }
1214                         /* If the entry level aci didn't contain anything valid for the
1215                          * current operation, climb up the tree and evaluate the
1216                          * acis with scope set to subtree
1217                          */
1218                         if( (tgrant == ACL_PRIV_NONE) && (tdeny == ACL_PRIV_NONE) ){
1219                                 dnParent(&(e->e_nname), &parent_ndn);
1220                                 while ( parent_ndn.bv_val != old_parent_ndn.bv_val ){
1221                                         old_parent_ndn = parent_ndn;
1222                                         Debug(LDAP_DEBUG_ACL, "checking ACI of %s\n", parent_ndn.bv_val, 0, 0);
1223                                         ret=backend_attribute(op, NULL, &parent_ndn, b->a_aci_at, &bvals);
1224                                         switch(ret){
1225                                                 case LDAP_SUCCESS :
1226                                                         if(bvals){
1227                                                                 for( i = 0; bvals[i].bv_val != NULL; i++){
1228                                                                         ACL_RECORD_VALUE_STATE;
1229                                                                         if (aci_mask(op, e, desc, val, &bvals[i], matches,
1230                                                                                         &grant, &deny, &aci_bv_children) != 0) {
1231                                                                                 tgrant |= grant;
1232                                                                                 tdeny |= deny;
1233                                                                                 /* evaluation stops as soon as either a "deny" or a
1234                                                                                  * "grant" directive matches.
1235                                                                                  */
1236                                                                                 if( (tgrant != ACL_PRIV_NONE) || (tdeny != ACL_PRIV_NONE) ){
1237                                                                                         stop=1;
1238                                                                                 }
1239                                                                         }
1240                                                                         Debug(LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n",
1241                                                                                 accessmask2str(tgrant,accessmaskbuf),
1242                                                                                 accessmask2str(tdeny, accessmaskbuf1), 0);
1243                                                                 }
1244                                                         }
1245                                                         stop=0;
1246                                                         break;
1247                                                 case LDAP_NO_SUCH_ATTRIBUTE:
1248                                                         /* just go on if the aci-Attribute is not present in
1249                                                          * the current entry
1250                                                          */
1251                                                         Debug(LDAP_DEBUG_ACL, "no such attribute\n", 0, 0, 0);
1252                                                         stop=0;
1253                                                         break;
1254                                                 case LDAP_NO_SUCH_OBJECT:
1255                                                         /* We have reached the base object */
1256                                                         Debug(LDAP_DEBUG_ACL, "no such object\n", 0, 0, 0);
1257                                                         stop=1;
1258                                                         break;
1259                                                 default:
1260                                                         stop=1;
1261                                                         break;
1262                                         }
1263                                         if(stop){
1264                                                 break;
1265                                         }
1266                                         dnParent(&old_parent_ndn, &parent_ndn);
1267                                 }
1268                         }
1269
1270
1271                         /* remove anything that the ACL clause does not allow */
1272                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
1273                         tdeny &= ACL_PRIV_MASK;
1274
1275                         /* see if we have anything to contribute */
1276                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
1277                                 continue;
1278                         }
1279
1280                         /* this could be improved by changing acl_mask so that it can deal with
1281                          * by clauses that return grant/deny pairs.  Right now, it does either
1282                          * additive or subtractive rights, but not both at the same time.  So,
1283                          * we need to combine the grant/deny pair into a single rights mask in
1284                          * a smart way:  if either grant or deny is "empty", then we use the
1285                          * opposite as is, otherwise we remove any denied rights from the grant
1286                          * rights mask and construct an additive mask.
1287                          */
1288                         if (ACL_IS_INVALID(tdeny)) {
1289                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
1290
1291                         } else if (ACL_IS_INVALID(tgrant)) {
1292                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
1293
1294                         } else {
1295                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
1296                         }
1297
1298                 } else
1299 #endif
1300                 {
1301                         modmask = b->a_access_mask;
1302                 }
1303
1304 #ifdef NEW_LOGGING
1305                 LDAP_LOG( ACL, RESULTS,
1306                            "acl_mask: [%d] applying %s (%s)\n",
1307                            i, accessmask2str( modmask, accessmaskbuf),
1308                            b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK
1309                            ? "break" : "stop"  );
1310 #else
1311                 Debug( LDAP_DEBUG_ACL,
1312                         "<= acl_mask: [%d] applying %s (%s)\n",
1313                         i, accessmask2str( modmask, accessmaskbuf ),
1314                         b->a_type == ACL_CONTINUE
1315                                 ? "continue"
1316                                 : b->a_type == ACL_BREAK
1317                                         ? "break"
1318                                         : "stop" );
1319 #endif
1320                 /* save old mask */
1321                 oldmask = *mask;
1322
1323                 if( ACL_IS_ADDITIVE(modmask) ) {
1324                         /* add privs */
1325                         ACL_PRIV_SET( *mask, modmask );
1326
1327                         /* cleanup */
1328                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
1329
1330                 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
1331                         /* substract privs */
1332                         ACL_PRIV_CLR( *mask, modmask );
1333
1334                         /* cleanup */
1335                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
1336
1337                 } else {
1338                         /* assign privs */
1339                         *mask = modmask;
1340                 }
1341
1342 #ifdef NEW_LOGGING
1343                 LDAP_LOG( ACL, DETAIL1,
1344                            "acl_mask: conn %lu  [%d] mask: %s\n",
1345                            op->o_connid, i, accessmask2str( *mask, accessmaskbuf)  );
1346 #else
1347                 Debug( LDAP_DEBUG_ACL,
1348                         "<= acl_mask: [%d] mask: %s\n",
1349                         i, accessmask2str(*mask, accessmaskbuf), 0 );
1350 #endif
1351
1352                 if( b->a_type == ACL_CONTINUE ) {
1353                         continue;
1354
1355                 } else if ( b->a_type == ACL_BREAK ) {
1356                         return ACL_BREAK;
1357
1358                 } else {
1359                         return ACL_STOP;
1360                 }
1361         }
1362
1363         /* implicit "by * none" clause */
1364         ACL_INIT(*mask);
1365
1366 #ifdef NEW_LOGGING
1367         LDAP_LOG( ACL, RESULTS,
1368                    "acl_mask: conn %lu  no more <who> clauses, returning %d (stop)\n",
1369                    op->o_connid, accessmask2str( *mask, accessmaskbuf) , 0 );
1370 #else
1371         Debug( LDAP_DEBUG_ACL,
1372                 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
1373                 accessmask2str(*mask, accessmaskbuf), 0, 0 );
1374 #endif
1375         return ACL_STOP;
1376 }
1377
1378 /*
1379  * acl_check_modlist - check access control on the given entry to see if
1380  * it allows the given modifications by the user associated with op.
1381  * returns      1       if mods allowed ok
1382  *                      0       mods not allowed
1383  */
1384
1385 int
1386 acl_check_modlist(
1387         Operation       *op,
1388         Entry   *e,
1389         Modifications   *mlist
1390 )
1391 {
1392         struct berval *bv;
1393         AccessControlState state = ACL_STATE_INIT;
1394
1395         assert( op->o_bd != NULL );
1396
1397         /* short circuit root database access */
1398         if ( be_isroot( op->o_bd, &op->o_ndn ) ) {
1399 #ifdef NEW_LOGGING
1400                 LDAP_LOG( ACL, DETAIL1,
1401                            "acl_check_modlist: conn %lu  access granted to root user\n",
1402                            op->o_connid, 0, 0 );
1403 #else
1404                 Debug( LDAP_DEBUG_ACL,
1405                         "<= acl_access_allowed: granted to database root\n",
1406                     0, 0, 0 );
1407 #endif
1408                 return 1;
1409         }
1410
1411         /* use backend default access if no backend acls */
1412         if( op->o_bd != NULL && op->o_bd->be_acl == NULL ) {
1413 #ifdef NEW_LOGGING
1414                 LDAP_LOG( ACL, DETAIL1,
1415                         "acl_check_modlist: backend default %s access %s to \"%s\"\n",
1416                         access2str( ACL_WRITE ),
1417                         op->o_bd->be_dfltaccess >= ACL_WRITE ? "granted" : "denied",
1418                         op->o_dn.bv_val  );
1419 #else
1420                 Debug( LDAP_DEBUG_ACL,
1421                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
1422                         access2str( ACL_WRITE ),
1423                         op->o_bd->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn.bv_val );
1424 #endif
1425                 return op->o_bd->be_dfltaccess >= ACL_WRITE;
1426
1427 #ifdef notdef
1428         /* op->o_bd is always non-NULL */
1429         /* use global default access if no global acls */
1430         } else if ( op->o_bd == NULL && global_acl == NULL ) {
1431 #ifdef NEW_LOGGING
1432                 LDAP_LOG( ACL, DETAIL1,
1433                         "acl_check_modlist: global default %s access %s to \"%s\"\n",
1434                    access2str( ACL_WRITE ),
1435                    global_default_access >= ACL_WRITE ? "granted" : "denied",
1436                    op->o_dn  );
1437 #else
1438                 Debug( LDAP_DEBUG_ACL,
1439                         "=> access_allowed: global default %s access %s to \"%s\"\n",
1440                         access2str( ACL_WRITE ),
1441                         global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1442 #endif
1443                 return global_default_access >= ACL_WRITE;
1444 #endif
1445         }
1446
1447         for ( ; mlist != NULL; mlist = mlist->sml_next ) {
1448                 /*
1449                  * no-user-modification operational attributes are ignored
1450                  * by ACL_WRITE checking as any found here are not provided
1451                  * by the user
1452                  */
1453                 if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) {
1454 #ifdef NEW_LOGGING
1455                         LDAP_LOG( ACL, DETAIL1,
1456                                    "acl_check_modlist: conn %lu  no-user-mod %s: modify access granted\n",
1457                                    op->o_connid, mlist->sml_desc->ad_cname.bv_val , 0 );
1458 #else
1459                         Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
1460                                 " modify access granted\n",
1461                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1462 #endif
1463                         continue;
1464                 }
1465
1466                 switch ( mlist->sml_op ) {
1467                 case LDAP_MOD_REPLACE:
1468                         /*
1469                          * We must check both permission to delete the whole
1470                          * attribute and permission to add the specific attributes.
1471                          * This prevents abuse from selfwriters.
1472                          */
1473                         if ( ! access_allowed( op, e,
1474                                 mlist->sml_desc, NULL, ACL_WRITE, &state ) )
1475                         {
1476                                 return( 0 );
1477                         }
1478
1479                         if ( mlist->sml_bvalues == NULL ) break;
1480
1481                         /* fall thru to check value to add */
1482
1483                 case LDAP_MOD_ADD:
1484                         assert( mlist->sml_bvalues != NULL );
1485
1486                         for ( bv = mlist->sml_nvalues
1487                                         ? mlist->sml_nvalues : mlist->sml_values;
1488                                 bv->bv_val != NULL; bv++ )
1489                         {
1490                                 if ( ! access_allowed( op, e,
1491                                         mlist->sml_desc, bv, ACL_WRITE, &state ) )
1492                                 {
1493                                         return( 0 );
1494                                 }
1495                         }
1496                         break;
1497
1498                 case LDAP_MOD_DELETE:
1499                         if ( mlist->sml_bvalues == NULL ) {
1500                                 if ( ! access_allowed( op, e,
1501                                         mlist->sml_desc, NULL, ACL_WRITE, NULL ) )
1502                                 {
1503                                         return( 0 );
1504                                 }
1505                                 break;
1506                         }
1507                         for ( bv = mlist->sml_nvalues
1508                                         ? mlist->sml_nvalues : mlist->sml_values;
1509                                 bv->bv_val != NULL; bv++ )
1510                         {
1511                                 if ( ! access_allowed( op, e,
1512                                         mlist->sml_desc, bv, ACL_WRITE, &state ) )
1513                                 {
1514                                         return( 0 );
1515                                 }
1516                         }
1517                         break;
1518
1519                 case SLAP_MOD_SOFTADD:
1520                         /* allow adding attribute via modrdn thru */
1521                         break;
1522
1523                 default:
1524                         assert( 0 );
1525                         return( 0 );
1526                 }
1527         }
1528
1529         return( 1 );
1530 }
1531
1532 static int
1533 aci_get_part(
1534         struct berval *list,
1535         int ix,
1536         char sep,
1537         struct berval *bv )
1538 {
1539         int len;
1540         char *p;
1541
1542         if (bv) {
1543                 bv->bv_len = 0;
1544                 bv->bv_val = NULL;
1545         }
1546         len = list->bv_len;
1547         p = list->bv_val;
1548         while (len >= 0 && --ix >= 0) {
1549                 while (--len >= 0 && *p++ != sep) ;
1550         }
1551         while (len >= 0 && *p == ' ') {
1552                 len--;
1553                 p++;
1554         }
1555         if (len < 0)
1556                 return(-1);
1557
1558         if (!bv)
1559                 return(0);
1560
1561         bv->bv_val = p;
1562         while (--len >= 0 && *p != sep) {
1563                 bv->bv_len++;
1564                 p++;
1565         }
1566         while (bv->bv_len > 0 && *--p == ' ')
1567                 bv->bv_len--;
1568         return(bv->bv_len);
1569 }
1570
1571 BerVarray
1572 aci_set_gather (SetCookie *cookie, struct berval *name, struct berval *attr)
1573 {
1574         AciSetCookie *cp = (AciSetCookie *)cookie;
1575         BerVarray bvals = NULL;
1576         struct berval ndn;
1577
1578         /* this routine needs to return the bervals instead of
1579          * plain strings, since syntax is not known.  It should
1580          * also return the syntax or some "comparison cookie".
1581          */
1582
1583         if (dnNormalize(0, NULL, NULL, name, &ndn, cp->op->o_tmpmemctx) == LDAP_SUCCESS) {
1584                 const char *text;
1585                 AttributeDescription *desc = NULL;
1586                 if (slap_bv2ad(attr, &desc, &text) == LDAP_SUCCESS) {
1587                         backend_attribute(cp->op,
1588                                 cp->e, &ndn, desc, &bvals);
1589                 }
1590                 sl_free(ndn.bv_val, cp->op->o_tmpmemctx);
1591         }
1592         return(bvals);
1593 }
1594
1595 static int
1596 aci_match_set (
1597         struct berval *subj,
1598         Operation *op,
1599         Entry *e,
1600         int setref
1601 )
1602 {
1603         struct berval set = { 0, NULL };
1604         int rc = 0;
1605         AciSetCookie cookie;
1606
1607         if (setref == 0) {
1608                 ber_dupbv_x( &set, subj, op->o_tmpmemctx );
1609         } else {
1610                 struct berval subjdn, ndn = { 0, NULL };
1611                 struct berval setat;
1612                 BerVarray bvals;
1613                 const char *text;
1614                 AttributeDescription *desc = NULL;
1615
1616                 /* format of string is "entry/setAttrName" */
1617                 if (aci_get_part(subj, 0, '/', &subjdn) < 0) {
1618                         return(0);
1619                 }
1620
1621                 if ( aci_get_part(subj, 1, '/', &setat) < 0 ) {
1622                         setat.bv_val = SLAPD_ACI_SET_ATTR;
1623                         setat.bv_len = sizeof(SLAPD_ACI_SET_ATTR)-1;
1624                 }
1625
1626                 if ( setat.bv_val != NULL ) {
1627                         /*
1628                          * NOTE: dnNormalize honors the ber_len field
1629                          * as the length of the dn to be normalized
1630                          */
1631                         if ( dnNormalize(0, NULL, NULL, &subjdn, &ndn, op->o_tmpmemctx) == LDAP_SUCCESS
1632                                 && slap_bv2ad(&setat, &desc, &text) == LDAP_SUCCESS )
1633                         {
1634                                 backend_attribute(op, e,
1635                                         &ndn, desc, &bvals);
1636                                 if ( bvals != NULL ) {
1637                                         if ( bvals[0].bv_val != NULL ) {
1638                                                 int i;
1639                                                 set = bvals[0];
1640                                                 bvals[0].bv_val = NULL;
1641                                                 for (i=1;bvals[i].bv_val;i++);
1642                                                 bvals[0].bv_val = bvals[i-1].bv_val;
1643                                                 bvals[i-1].bv_val = NULL;
1644                                         }
1645                                         ber_bvarray_free_x(bvals, op->o_tmpmemctx);
1646                                 }
1647                         }
1648                         if (ndn.bv_val)
1649                                 free(ndn.bv_val);
1650                 }
1651         }
1652
1653         if (set.bv_val != NULL) {
1654                 cookie.op = op;
1655                 cookie.e = e;
1656                 rc = (slap_set_filter(aci_set_gather, (SetCookie *)&cookie, &set,
1657                         &op->o_ndn, &e->e_nname, NULL) > 0);
1658                 sl_free(set.bv_val, op->o_tmpmemctx);
1659         }
1660         return(rc);
1661 }
1662
1663 #ifdef SLAPD_ACI_ENABLED
1664 static int
1665 aci_list_map_rights(
1666         struct berval *list )
1667 {
1668         struct berval bv;
1669         slap_access_t mask;
1670         int i;
1671
1672         ACL_INIT(mask);
1673         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1674                 if (bv.bv_len <= 0)
1675                         continue;
1676                 switch (*bv.bv_val) {
1677                 case 'c':
1678                         ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
1679                         break;
1680                 case 's':
1681                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines
1682                          * the right 's' to mean "set", but in the examples states
1683                          * that the right 's' means "search".  The latter definition
1684                          * is used here.
1685                          */
1686                         ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
1687                         break;
1688                 case 'r':
1689                         ACL_PRIV_SET(mask, ACL_PRIV_READ);
1690                         break;
1691                 case 'w':
1692                         ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
1693                         break;
1694                 case 'x':
1695                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not
1696                          * define any equivalent to the AUTH right, so I've just used
1697                          * 'x' for now.
1698                          */
1699                         ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
1700                         break;
1701                 default:
1702                         break;
1703                 }
1704
1705         }
1706         return(mask);
1707 }
1708
1709 static int
1710 aci_list_has_attr(
1711         struct berval *list,
1712         const struct berval *attr,
1713         struct berval *val )
1714 {
1715         struct berval bv, left, right;
1716         int i;
1717
1718         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1719                 if (aci_get_part(&bv, 0, '=', &left) < 0
1720                         || aci_get_part(&bv, 1, '=', &right) < 0)
1721                 {
1722                         if (ber_bvstrcasecmp(attr, &bv) == 0)
1723                                 return(1);
1724                 } else if (val == NULL) {
1725                         if (ber_bvstrcasecmp(attr, &left) == 0)
1726                                 return(1);
1727                 } else {
1728                         if (ber_bvstrcasecmp(attr, &left) == 0) {
1729                                 /* this is experimental code that implements a
1730                                  * simple (prefix) match of the attribute value.
1731                                  * the ACI draft does not provide for aci's that
1732                                  * apply to specific values, but it would be
1733                                  * nice to have.  If the <attr> part of an aci's
1734                                  * rights list is of the form <attr>=<value>,
1735                                  * that means the aci applies only to attrs with
1736                                  * the given value.  Furthermore, if the attr is
1737                                  * of the form <attr>=<value>*, then <value> is
1738                                  * treated as a prefix, and the aci applies to
1739                                  * any value with that prefix.
1740                                  *
1741                                  * Ideally, this would allow r.e. matches.
1742                                  */
1743                                 if (aci_get_part(&right, 0, '*', &left) < 0
1744                                         || right.bv_len <= left.bv_len)
1745                                 {
1746                                         if (ber_bvstrcasecmp(val, &right) == 0)
1747                                                 return(1);
1748                                 } else if (val->bv_len >= left.bv_len) {
1749                                         if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0)
1750                                                 return(1);
1751                                 }
1752                         }
1753                 }
1754         }
1755         return(0);
1756 }
1757
1758 static slap_access_t
1759 aci_list_get_attr_rights(
1760         struct berval *list,
1761         const struct berval *attr,
1762         struct berval *val )
1763 {
1764     struct berval bv;
1765     slap_access_t mask;
1766     int i;
1767
1768         /* loop through each rights/attr pair, skip first part (action) */
1769         ACL_INIT(mask);
1770         for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
1771                 if (aci_list_has_attr(&bv, attr, val) == 0)
1772                         continue;
1773                 if (aci_get_part(list, i, ';', &bv) < 0)
1774                         continue;
1775                 mask |= aci_list_map_rights(&bv);
1776         }
1777         return(mask);
1778 }
1779
1780 static int
1781 aci_list_get_rights(
1782         struct berval *list,
1783         const struct berval *attr,
1784         struct berval *val,
1785         slap_access_t *grant,
1786         slap_access_t *deny )
1787 {
1788     struct berval perm, actn;
1789     slap_access_t *mask;
1790     int i, found;
1791
1792         if (attr == NULL || attr->bv_len == 0
1793                         || ber_bvstrcasecmp( attr, &aci_bv_entry ) == 0) {
1794                 attr = &aci_bv_br_entry;
1795         }
1796
1797         found = 0;
1798         ACL_INIT(*grant);
1799         ACL_INIT(*deny);
1800         /* loop through each permissions clause */
1801         for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) {
1802                 if (aci_get_part(&perm, 0, ';', &actn) < 0)
1803                         continue;
1804                 if (ber_bvstrcasecmp( &aci_bv_grant, &actn ) == 0) {
1805                         mask = grant;
1806                 } else if (ber_bvstrcasecmp( &aci_bv_deny, &actn ) == 0) {
1807                         mask = deny;
1808                 } else {
1809                         continue;
1810                 }
1811
1812                 found = 1;
1813                 *mask |= aci_list_get_attr_rights(&perm, attr, val);
1814                 *mask |= aci_list_get_attr_rights(&perm, &aci_bv_br_all, NULL);
1815         }
1816         return(found);
1817 }
1818
1819 static int
1820 aci_group_member (
1821         struct berval *subj,
1822         struct berval *defgrpoc,
1823         struct berval *defgrpat,
1824         Operation               *op,
1825         Entry           *e,
1826         regmatch_t      *matches
1827 )
1828 {
1829         struct berval subjdn;
1830         struct berval grpoc;
1831         struct berval grpat;
1832         ObjectClass *grp_oc = NULL;
1833         AttributeDescription *grp_ad = NULL;
1834         const char *text;
1835         int rc;
1836
1837         /* format of string is "group/objectClassValue/groupAttrName" */
1838         if (aci_get_part(subj, 0, '/', &subjdn) < 0) {
1839                 return(0);
1840         }
1841
1842         if (aci_get_part(subj, 1, '/', &grpoc) < 0) {
1843                 grpoc = *defgrpoc;
1844         }
1845
1846         if (aci_get_part(subj, 2, '/', &grpat) < 0) {
1847                 grpat = *defgrpat;
1848         }
1849
1850         rc = slap_bv2ad( &grpat, &grp_ad, &text );
1851         if( rc != LDAP_SUCCESS ) {
1852                 rc = 0;
1853                 goto done;
1854         }
1855         rc = 0;
1856
1857         grp_oc = oc_bvfind( &grpoc );
1858
1859         if (grp_oc != NULL && grp_ad != NULL ) {
1860                 char buf[ACL_BUF_SIZE];
1861                 struct berval bv, ndn;
1862                 bv.bv_len = sizeof( buf ) - 1;
1863                 bv.bv_val = (char *)&buf;
1864                 string_expand(&bv, &subjdn, e->e_ndn, matches);
1865                 if ( dnNormalize(0, NULL, NULL, &bv, &ndn, op->o_tmpmemctx) == LDAP_SUCCESS ) {
1866                         rc = (backend_group(op, e, &ndn, &op->o_ndn,
1867                                 grp_oc, grp_ad) == 0);
1868                         free( ndn.bv_val );
1869                 }
1870         }
1871
1872 done:
1873         return(rc);
1874 }
1875
1876 static int
1877 aci_mask(
1878     Operation           *op,
1879     Entry                       *e,
1880         AttributeDescription *desc,
1881     struct berval       *val,
1882     struct berval       *aci,
1883         regmatch_t              *matches,
1884         slap_access_t   *grant,
1885         slap_access_t   *deny,
1886         struct berval   *scope
1887 )
1888 {
1889     struct berval bv, perms, sdn;
1890         int rc;
1891
1892
1893         assert( desc->ad_cname.bv_val != NULL );
1894
1895         /* parse an aci of the form:
1896                 oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN
1897
1898            See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
1899            a full description of the format for this attribute.
1900            Differences: "this" in the draft is "self" here, and
1901            "self" and "public" is in the position of dnType.
1902
1903            For now, this routine only supports scope=entry.
1904          */
1905         /* check that the aci has all 5 components */
1906         if (aci_get_part(aci, 4, '#', NULL) < 0)
1907                 return(0);
1908
1909         /* check that the aci family is supported */
1910         if (aci_get_part(aci, 0, '#', &bv) < 0)
1911                 return(0);
1912
1913         /* check that the scope matches */
1914         if (aci_get_part(aci, 1, '#', &bv) < 0
1915                 || ber_bvstrcasecmp( scope, &bv ) != 0)
1916         {
1917                 return(0);
1918         }
1919
1920         /* get the list of permissions clauses, bail if empty */
1921         if (aci_get_part(aci, 2, '#', &perms) <= 0)
1922                 return(0);
1923
1924         /* check if any permissions allow desired access */
1925         if (aci_list_get_rights(&perms, &desc->ad_cname, val, grant, deny) == 0)
1926                 return(0);
1927
1928         /* see if we have a DN match */
1929         if (aci_get_part(aci, 3, '#', &bv) < 0)
1930                 return(0);
1931
1932         if (aci_get_part(aci, 4, '#', &sdn) < 0)
1933                 return(0);
1934
1935         if (ber_bvstrcasecmp( &aci_bv_access_id, &bv ) == 0) {
1936                 struct berval ndn;
1937                 rc = 0;
1938                 if ( dnNormalize(0, NULL, NULL, &sdn, &ndn, op->o_tmpmemctx) == LDAP_SUCCESS ) {
1939                         if (dn_match( &op->o_ndn, &ndn))
1940                                 rc = 1;
1941                         free(ndn.bv_val);
1942                 }
1943                 return (rc);
1944
1945         } else if (ber_bvstrcasecmp( &aci_bv_public, &bv ) == 0) {
1946                 return(1);
1947
1948         } else if (ber_bvstrcasecmp( &aci_bv_self, &bv ) == 0) {
1949                 if (dn_match(&op->o_ndn, &e->e_nname))
1950                         return(1);
1951
1952         } else if (ber_bvstrcasecmp( &aci_bv_dnattr, &bv ) == 0) {
1953                 Attribute *at;
1954                 AttributeDescription *ad = NULL;
1955                 const char *text;
1956
1957                 rc = slap_bv2ad( &sdn, &ad, &text );
1958
1959                 if( rc != LDAP_SUCCESS ) {
1960                         return 0;
1961                 }
1962
1963                 rc = 0;
1964
1965                 bv = op->o_ndn;
1966
1967                 for(at = attrs_find( e->e_attrs, ad );
1968                         at != NULL;
1969                         at = attrs_find( at->a_next, ad ) )
1970                 {
1971                         if (value_find_ex( ad,
1972                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1973                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1974                                 at->a_nvals,
1975                                 &bv, op->o_tmpmemctx) == 0 )
1976                         {
1977                                 rc = 1;
1978                                 break;
1979                         }
1980                 }
1981
1982                 return rc;
1983
1984
1985         } else if (ber_bvstrcasecmp( &aci_bv_group, &bv ) == 0) {
1986                 if (aci_group_member(&sdn, &aci_bv_group_class, &aci_bv_group_attr, op, e, matches))
1987                         return(1);
1988
1989         } else if (ber_bvstrcasecmp( &aci_bv_role, &bv ) == 0) {
1990                 if (aci_group_member(&sdn, &aci_bv_role_class, &aci_bv_role_attr, op, e, matches))
1991                         return(1);
1992
1993         } else if (ber_bvstrcasecmp( &aci_bv_set, &bv ) == 0) {
1994                 if (aci_match_set(&sdn, op, e, 0))
1995                         return(1);
1996
1997         } else if (ber_bvstrcasecmp( &aci_bv_set_ref, &bv ) == 0) {
1998                 if (aci_match_set(&sdn, op, e, 1))
1999                         return(1);
2000
2001         }
2002
2003         return(0);
2004 }
2005
2006 #endif  /* SLAPD_ACI_ENABLED */
2007
2008 static void
2009 string_expand(
2010         struct berval *bv,
2011         struct berval *pat,
2012         char *match,
2013         regmatch_t *matches)
2014 {
2015         ber_len_t       size;
2016         char   *sp;
2017         char   *dp;
2018         int     flag;
2019
2020         size = 0;
2021         bv->bv_val[0] = '\0';
2022         bv->bv_len--; /* leave space for lone $ */
2023
2024         flag = 0;
2025         for ( dp = bv->bv_val, sp = pat->bv_val; size < bv->bv_len &&
2026                 sp < pat->bv_val + pat->bv_len ; sp++ )
2027         {
2028                 /* did we previously see a $ */
2029                 if ( flag ) {
2030                         if ( flag == 1 && *sp == '$' ) {
2031                                 *dp++ = '$';
2032                                 size++;
2033                                 flag = 0;
2034
2035                         } else if ( flag == 1 && *sp == '{' /*'}'*/) {
2036                                 flag = 2;
2037
2038                         } else if ( *sp >= '0' && *sp <= '9' ) {
2039                                 int     n;
2040                                 int     i;
2041                                 int     l;
2042
2043                                 n = *sp - '0';
2044
2045                                 if ( flag == 2 ) {
2046                                         for ( sp++; *sp != '\0' && *sp != /*'{'*/ '}'; sp++ ) {
2047                                                 if ( *sp >= '0' && *sp <= '9' ) {
2048                                                         n = 10*n + ( *sp - '0' );
2049                                                 }
2050                                         }
2051
2052                                         if ( *sp != /*'{'*/ '}' ) {
2053                                                 /* error */
2054                                         }
2055                                 }
2056
2057                                 if ( n >= MAXREMATCHES ) {
2058
2059                                 }
2060
2061                                 *dp = '\0';
2062                                 i = matches[n].rm_so;
2063                                 l = matches[n].rm_eo;
2064                                 for ( ; size < bv->bv_len && i < l; size++, i++ ) {
2065                                         *dp++ = match[i];
2066                                 }
2067                                 *dp = '\0';
2068
2069                                 flag = 0;
2070                         }
2071                 } else {
2072                         if (*sp == '$') {
2073                                 flag = 1;
2074                         } else {
2075                                 *dp++ = *sp;
2076                                 size++;
2077                         }
2078                 }
2079         }
2080
2081         if ( flag ) {
2082                 /* must have ended with a single $ */
2083                 *dp++ = '$';
2084                 size++;
2085         }
2086
2087         *dp = '\0';
2088         bv->bv_len = size;
2089
2090 #ifdef NEW_LOGGING
2091         LDAP_LOG( ACL, DETAIL1,
2092            "string_expand:  pattern = %.*s\n", (int)pat->bv_len, pat->bv_val, 0 );
2093         LDAP_LOG( ACL, DETAIL1, "string_expand:  expanded = %s\n", bv->bv_val, 0, 0 );
2094 #else
2095         Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern:  %.*s\n", (int)pat->bv_len, pat->bv_val, 0 );
2096         Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", bv->bv_val, 0, 0 );
2097 #endif
2098 }
2099
2100 static int
2101 regex_matches(
2102         struct berval *pat,                     /* pattern to expand and match against */
2103         char *str,                              /* string to match against pattern */
2104         char *buf,                              /* buffer with $N expansion variables */
2105         regmatch_t *matches             /* offsets in buffer for $N expansion variables */
2106 )
2107 {
2108         regex_t re;
2109         char newbuf[ACL_BUF_SIZE];
2110         struct berval bv;
2111         int     rc;
2112
2113         bv.bv_len = sizeof(newbuf) - 1;
2114         bv.bv_val = newbuf;
2115
2116         if(str == NULL) str = "";
2117
2118         string_expand(&bv, pat, buf, matches);
2119         if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) {
2120                 char error[ACL_BUF_SIZE];
2121                 regerror(rc, &re, error, sizeof(error));
2122
2123 #ifdef NEW_LOGGING
2124                 LDAP_LOG( ACL, ERR,
2125                            "regex_matches: compile( \"%s\", \"%s\") failed %s\n",
2126                            pat->bv_val, str, error  );
2127 #else
2128                 Debug( LDAP_DEBUG_TRACE,
2129                     "compile( \"%s\", \"%s\") failed %s\n",
2130                         pat->bv_val, str, error );
2131 #endif
2132                 return( 0 );
2133         }
2134
2135         rc = regexec(&re, str, 0, NULL, 0);
2136         regfree( &re );
2137
2138 #ifdef NEW_LOGGING
2139         LDAP_LOG( ACL, DETAIL2, "regex_matches: string:   %s\n", str, 0, 0 );
2140         LDAP_LOG( ACL, DETAIL2, "regex_matches: rc:     %d  %s\n",
2141                    rc, rc ? "matches" : "no matches", 0  );
2142 #else
2143         Debug( LDAP_DEBUG_TRACE,
2144             "=> regex_matches: string:   %s\n", str, 0, 0 );
2145         Debug( LDAP_DEBUG_TRACE,
2146             "=> regex_matches: rc: %d %s\n",
2147                 rc, !rc ? "matches" : "no matches", 0 );
2148 #endif
2149         return( !rc );
2150 }
2151