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

   1 /* acl.c - routines to parse and check acl's */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/regex.h>
  13 #include <ac/socket.h>
  14 #include <ac/string.h>
  15
  16 #include "slap.h"
  17 #include "sets.h"
  18 #include "lber_pvt.h"
  19
  20 #define ACL_BUF_SIZE    1024    /* use most appropriate size */
  21
  22 /*
  23  * speed up compares
  24  */
  25 static struct berval
  26         aci_bv_entry            = BER_BVC("entry"),
  27         aci_bv_br_entry         = BER_BVC("[entry]"),
  28         aci_bv_br_all           = BER_BVC("[all]"),
  29         aci_bv_access_id        = BER_BVC("access-id"),
  30         aci_bv_anonymous        = BER_BVC("anonymous"),
  31         aci_bv_public           = BER_BVC("public"),
  32         aci_bv_users            = BER_BVC("users"),
  33         aci_bv_self             = BER_BVC("self"),
  34         aci_bv_dnattr           = BER_BVC("dnattr"),
  35         aci_bv_group            = BER_BVC("group"),
  36         aci_bv_role             = BER_BVC("role"),
  37         aci_bv_set              = BER_BVC("set"),
  38         aci_bv_set_ref          = BER_BVC("set-ref"),
  39         aci_bv_grant            = BER_BVC("grant"),
  40         aci_bv_deny             = BER_BVC("deny"),
  41
  42         aci_bv_group_class      = BER_BVC(SLAPD_GROUP_CLASS),
  43         aci_bv_group_attr       = BER_BVC(SLAPD_GROUP_ATTR),
  44         aci_bv_role_class       = BER_BVC(SLAPD_ROLE_CLASS),
  45         aci_bv_role_attr        = BER_BVC(SLAPD_ROLE_ATTR);
  46
  47
  48 static AccessControl * acl_get(
  49         AccessControl *ac, int *count,
  50         Operation *op, Entry *e,
  51         AttributeDescription *desc,
  52         int nmatches, regmatch_t *matches );
  53
  54 static slap_control_t acl_mask(
  55         AccessControl *ac, slap_mask_t *mask,
  56         Operation *op, Entry *e,
  57         AttributeDescription *desc,
  58         struct berval *val,
  59         regmatch_t *matches,
  60         int count,
  61         AccessControlState *state );
  62
  63 #ifdef SLAPD_ACI_ENABLED
  64 static int aci_mask(
  65         Operation *op, Entry *e,
  66         AttributeDescription *desc,
  67         struct berval *val,
  68         struct berval *aci,
  69         regmatch_t *matches,
  70         slap_access_t *grant,
  71         slap_access_t *deny );
  72 #endif
  73
  74 static int      regex_matches(
  75         struct berval *pat, char *str, char *buf, regmatch_t *matches);
  76 static void     string_expand(
  77         struct berval *newbuf, struct berval *pattern,
  78         char *match, regmatch_t *matches);
  79
  80 typedef struct AciSetCookie {
  81         Operation *op;
  82         Entry *e;
  83 } AciSetCookie;
  84
  85 SLAP_SET_GATHER aci_set_gather;
  86 static int aci_match_set ( struct berval *subj, Operation *op,
  87     Entry *e, int setref );
  88
  89 /*
  90  * access_allowed - check whether op->o_ndn is allowed the requested access
  91  * to entry e, attribute attr, value val.  if val is null, access to
  92  * the whole attribute is assumed (all values).
  93  *
  94  * This routine loops through all access controls and calls
  95  * acl_mask() on each applicable access control.
  96  * The loop exits when a definitive answer is reached or
  97  * or no more controls remain.
  98  *
  99  * returns:
 100  *              0       access denied
 101  *              1       access granted
 102  */
 103
 104 int
 105 access_allowed(
 106         Operation               *op,
 107         Entry           *e,
 108         AttributeDescription    *desc,
 109         struct berval   *val,
 110         slap_access_t   access,
 111         AccessControlState *state )
 112 {
 113         int                             ret = 1;
 114         int                             count;
 115         AccessControl                   *a = NULL;
 116         Backend *be;
 117         int     be_null = 0;
 118
 119 #ifdef LDAP_DEBUG
 120         char accessmaskbuf[ACCESSMASK_MAXLEN];
 121 #endif
 122         slap_mask_t mask;
 123         slap_control_t control;
 124         const char *attr;
 125         regmatch_t matches[MAXREMATCHES];
 126         int        st_same_attr = 0;
 127         int        st_initialized = 0;
 128         static AccessControlState state_init = ACL_STATE_INIT;
 129
 130         assert( e != NULL );
 131         assert( desc != NULL );
 132         assert( access > ACL_NONE );
 133
 134         attr = desc->ad_cname.bv_val;
 135
 136         assert( attr != NULL );
 137
 138         if( op && op->o_is_auth_check && (access == ACL_SEARCH || access == ACL_READ)) {
 139                 access = ACL_AUTH;
 140         }
 141         if( state && state->as_recorded && state->as_vd_ad==desc) {
 142                 if( state->as_recorded & ACL_STATE_RECORDED_NV &&
 143                         val == NULL )
 144                 {
 145                         return state->as_result;
 146
 147                 } else if ( state->as_recorded & ACL_STATE_RECORDED_VD &&
 148                         val != NULL && state->as_vd_acl == NULL )
 149                 {
 150                         return state->as_result;
 151                 }
 152                 st_same_attr = 1;
 153         } if (state) {
 154                 state->as_vd_ad=desc;
 155         }
 156
 157 #ifdef NEW_LOGGING
 158         LDAP_LOG( ACL, ENTRY,
 159                 "access_allowed: %s access to \"%s\" \"%s\" requested\n",
 160                 access2str( access ), e->e_dn, attr );
 161 #else
 162         Debug( LDAP_DEBUG_ACL,
 163                 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
 164             access2str( access ), e->e_dn, attr );
 165 #endif
 166
 167         if ( op == NULL ) {
 168                 /* no-op call */
 169                 goto done;
 170         }
 171
 172         be = op->o_bd;
 173         if ( be == NULL ) {
 174                 be = &backends[0];
 175                 be_null = 1;
 176                 op->o_bd = be;
 177         }
 178         assert( be != NULL );
 179
 180         /* grant database root access */
 181         if ( be != NULL && be_isroot( be, &op->o_ndn ) ) {
 182 #ifdef NEW_LOGGING
 183                 LDAP_LOG( ACL, INFO,
 184                         "access_allowed: conn %lu root access granted\n",
 185                         op->o_connid, 0, 0 );
 186 #else
 187                 Debug( LDAP_DEBUG_ACL,
 188                     "<= root access granted\n",
 189                         0, 0, 0 );
 190 #endif
 191                 goto done;
 192         }
 193
 194         /*
 195          * no-user-modification operational attributes are ignored
 196          * by ACL_WRITE checking as any found here are not provided
 197          * by the user
 198          */
 199         if ( access >= ACL_WRITE && is_at_no_user_mod( desc->ad_type )
 200                 && desc != slap_schema.si_ad_entry
 201                 && desc != slap_schema.si_ad_children )
 202         {
 203 #ifdef NEW_LOGGING
 204                 LDAP_LOG( ACL, DETAIL1,
 205                         "access_allowed: conn %lu NoUserMod Operational attribute: %s "
 206                         "access granted\n", op->o_connid, attr , 0 );
 207 #else
 208                 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
 209                         " %s access granted\n",
 210                         attr, 0, 0 );
 211 #endif
 212                 goto done;
 213         }
 214
 215         /* use backend default access if no backend acls */
 216         if( be != NULL && be->be_acl == NULL ) {
 217 #ifdef NEW_LOGGING
 218                 LDAP_LOG( ACL, DETAIL1,
 219                         "access_allowed: backend default %s access %s to \"%s\"\n",
 220                     access2str( access ),
 221                     be->be_dfltaccess >= access ? "granted" : "denied",
 222                         op->o_dn.bv_val );
 223 #else
 224                 Debug( LDAP_DEBUG_ACL,
 225                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
 226                         access2str( access ),
 227                         be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn.bv_val );
 228 #endif
 229                 ret = be->be_dfltaccess >= access;
 230                 goto done;
 231
 232 #ifdef notdef
 233         /* be is always non-NULL */
 234         /* use global default access if no global acls */
 235         } else if ( be == NULL && global_acl == NULL ) {
 236 #ifdef NEW_LOGGING
 237                 LDAP_LOG( ACL, DETAIL1,
 238                         "access_allowed: global default %s access %s to \"%s\"\n",
 239                     access2str( access ),
 240                     global_default_access >= access ? "granted" : "denied",
 241                         op->o_dn.bv_val );
 242 #else
 243                 Debug( LDAP_DEBUG_ACL,
 244                         "=> access_allowed: global default %s access %s to \"%s\"\n",
 245                         access2str( access ),
 246                         global_default_access >= access ? "granted" : "denied", op->o_dn.bv_val );
 247 #endif
 248                 ret = global_default_access >= access;
 249                 goto done;
 250 #endif
 251         }
 252
 253         ret = 0;
 254         control = ACL_BREAK;
 255
 256         if( st_same_attr ) {
 257                 assert( state->as_vd_acl != NULL );
 258
 259                 a = state->as_vd_acl;
 260                 mask = state->as_vd_acl_mask;
 261                 count = state->as_vd_acl_count;
 262                 AC_MEMCPY( matches, state->as_vd_acl_matches,
 263                         sizeof(matches) );
 264                 goto vd_access;
 265
 266         } else {
 267                 a = NULL;
 268                 ACL_INIT(mask);
 269                 count = 0;
 270                 memset(matches, '\0', sizeof(matches));
 271         }
 272
 273         while((a = acl_get( a, &count, op, e, desc,
 274                 MAXREMATCHES, matches )) != NULL)
 275         {
 276                 int i;
 277
 278                 for (i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++) {
 279 #ifdef NEW_LOGGING
 280                         LDAP_LOG( ACL, DETAIL1,
 281                                 "access_allowed: match[%d]:  %d %d ",
 282                             i, (int)matches[i].rm_so, (int)matches[i].rm_eo );
 283 #else
 284                         Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
 285                             (int)matches[i].rm_so, (int)matches[i].rm_eo );
 286 #endif
 287                         if( matches[i].rm_so <= matches[0].rm_eo ) {
 288                                 int n;
 289                                 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++) {
 290                                         Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
 291                                 }
 292                         }
 293 #ifdef NEW_LOGGING
 294                         LDAP_LOG( ACL, ARGS, "\n" , 0, 0, 0 );
 295 #else
 296                         Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
 297 #endif
 298                 }
 299
 300                 if (state) {
 301                         if (state->as_vi_acl == a && (state->as_recorded & ACL_STATE_RECORDED_NV)) {
 302                                 Debug( LDAP_DEBUG_ACL, "access_allowed: result from state (%s)\n", attr, 0, 0 );
 303                                 return state->as_result;
 304                         } else if (!st_initialized) {
 305                                 Debug( LDAP_DEBUG_ACL, "access_allowed: no res from state (%s)\n", attr, 0, 0);
 306                             *state = state_init;
 307                                 state->as_vd_ad=desc;
 308                                 st_initialized=1;
 309                         }
 310                 }
 311
 312 vd_access:
 313                 control = acl_mask( a, &mask, op,
 314                         e, desc, val, matches, count, state );
 315
 316                 if ( control != ACL_BREAK ) {
 317                         break;
 318                 }
 319
 320                 memset(matches, '\0', sizeof(matches));
 321         }
 322
 323         if ( ACL_IS_INVALID( mask ) ) {
 324 #ifdef NEW_LOGGING
 325                 LDAP_LOG( ACL, DETAIL1,
 326                         "access_allowed: conn %lu \"%s\" (%s) invalid!\n",
 327                     op->o_connid, e->e_dn, attr );
 328 #else
 329                 Debug( LDAP_DEBUG_ACL,
 330                         "=> access_allowed: \"%s\" (%s) invalid!\n",
 331                         e->e_dn, attr, 0 );
 332 #endif
 333                 ACL_INIT(mask);
 334
 335         } else if ( control == ACL_BREAK ) {
 336 #ifdef NEW_LOGGING
 337                 LDAP_LOG( ACL, DETAIL1,
 338                         "access_allowed: conn %lu        no more rules\n", op->o_connid, 0,0 );
 339 #else
 340                 Debug( LDAP_DEBUG_ACL,
 341                         "=> access_allowed: no more rules\n", 0, 0, 0);
 342 #endif
 343
 344                 goto done;
 345         }
 346
 347 #ifdef NEW_LOGGING
 348         LDAP_LOG( ACL, ENTRY,
 349                 "access_allowed: %s access %s by %s\n",
 350                 access2str( access ), ACL_GRANT( mask, access ) ? "granted" : "denied",
 351                 accessmask2str( mask, accessmaskbuf ) );
 352 #else
 353         Debug( LDAP_DEBUG_ACL,
 354                 "=> access_allowed: %s access %s by %s\n",
 355                 access2str( access ),
 356                 ACL_GRANT(mask, access) ? "granted" : "denied",
 357                 accessmask2str( mask, accessmaskbuf ) );
 358 #endif
 359
 360         ret = ACL_GRANT(mask, access);
 361
 362 done:
 363         if( state != NULL ) {
 364                 /* If not value-dependent, save ACL in case of more attrs */
 365                 if ( !(state->as_recorded & ACL_STATE_RECORDED_VD) )
 366                         state->as_vi_acl = a;
 367                 state->as_recorded |= ACL_STATE_RECORDED;
 368                 state->as_result = ret;
 369         }
 370         if (be_null) op->o_bd = NULL;
 371         return ret;
 372 }
 373
 374 /*
 375  * acl_get - return the acl applicable to entry e, attribute
 376  * attr.  the acl returned is suitable for use in subsequent calls to
 377  * acl_access_allowed().
 378  */
 379
 380 static AccessControl *
 381 acl_get(
 382         AccessControl *a,
 383         int                     *count,
 384         Operation       *op,
 385         Entry           *e,
 386         AttributeDescription *desc,
 387         int                     nmatch,
 388         regmatch_t      *matches )
 389 {
 390         const char *attr;
 391         int dnlen, patlen;
 392
 393         assert( e != NULL );
 394         assert( count != NULL );
 395         assert( desc != NULL );
 396
 397         attr = desc->ad_cname.bv_val;
 398
 399         assert( attr != NULL );
 400
 401         if( a == NULL ) {
 402                 if( op->o_bd == NULL ) {
 403                         a = global_acl;
 404                 } else {
 405                         a = op->o_bd->be_acl;
 406                 }
 407
 408                 assert( a != NULL );
 409
 410         } else {
 411                 a = a->acl_next;
 412         }
 413
 414         dnlen = e->e_nname.bv_len;
 415
 416         for ( ; a != NULL; a = a->acl_next ) {
 417                 (*count) ++;
 418
 419                 if ( a->acl_dn_pat.bv_len || ( a->acl_dn_style != ACL_STYLE_REGEX )) {
 420                         if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
 421 #ifdef NEW_LOGGING
 422                                 LDAP_LOG( ACL, DETAIL1,
 423                                         "acl_get: dnpat [%d] %s nsub: %d\n",
 424                                         *count, a->acl_dn_pat.bv_val,
 425                                         (int) a->acl_dn_re.re_nsub );
 426 #else
 427                                 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
 428                                         *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub );
 429 #endif
 430                                 if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
 431                                         continue;
 432
 433                         } else {
 434 #ifdef NEW_LOGGING
 435                                 LDAP_LOG( ACL, DETAIL1, "acl_get: dn [%d] %s\n",
 436                                            *count, a->acl_dn_pat.bv_val, 0 );
 437 #else
 438                                 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
 439                                         *count, a->acl_dn_pat.bv_val, 0 );
 440 #endif
 441                                 patlen = a->acl_dn_pat.bv_len;
 442                                 if ( dnlen < patlen )
 443                                         continue;
 444
 445                                 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
 446                                         /* base dn -- entire object DN must match */
 447                                         if ( dnlen != patlen )
 448                                                 continue;
 449
 450                                 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
 451                                         int rdnlen = -1;
 452
 453                                         if ( dnlen <= patlen )
 454                                                 continue;
 455
 456                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 457                                                 continue;
 458
 459                                         rdnlen = dn_rdnlen( NULL, &e->e_nname );
 460                                         if ( rdnlen != dnlen - patlen - 1 )
 461                                                 continue;
 462
 463                                 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
 464                                         if ( dnlen > patlen && !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 465                                                 continue;
 466
 467                                 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
 468                                         if ( dnlen <= patlen )
 469                                                 continue;
 470                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 471                                                 continue;
 472                                 }
 473
 474                                 if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
 475                                         continue;
 476                         }
 477
 478 #ifdef NEW_LOGGING
 479                         LDAP_LOG( ACL, DETAIL1,
 480                                 "acl_get: [%d] matched\n", *count, 0, 0 );
 481 #else
 482                         Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
 483                                 *count, 0, 0 );
 484 #endif
 485                 }
 486
 487                 if ( a->acl_filter != NULL ) {
 488                         ber_int_t rc = test_filter( NULL, e, a->acl_filter );
 489                         if ( rc != LDAP_COMPARE_TRUE ) {
 490                                 continue;
 491                         }
 492                 }
 493
 494 #ifdef NEW_LOGGING
 495                 LDAP_LOG( ACL, DETAIL1,
 496                         "acl_get: [%d] check attr %s\n", *count, attr ,0 );
 497 #else
 498                 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] check attr %s\n",
 499                        *count, attr, 0);
 500 #endif
 501                 if ( attr == NULL || a->acl_attrs == NULL ||
 502                         ad_inlist( desc, a->acl_attrs ) )
 503                 {
 504 #ifdef NEW_LOGGING
 505                         LDAP_LOG( ACL, DETAIL1,
 506                                 "acl_get:  [%d] acl %s attr: %s\n", *count, e->e_dn, attr );
 507 #else
 508                         Debug( LDAP_DEBUG_ACL,
 509                                 "<= acl_get: [%d] acl %s attr: %s\n",
 510                                 *count, e->e_dn, attr );
 511 #endif
 512                         return a;
 513                 }
 514                 matches[0].rm_so = matches[0].rm_eo = -1;
 515         }
 516
 517 #ifdef NEW_LOGGING
 518         LDAP_LOG( ACL, RESULTS, "acl_get: done.\n", 0, 0, 0 );
 519 #else
 520         Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
 521 #endif
 522         return( NULL );
 523 }
 524
 525 /*
 526  * Record value-dependent access control state
 527  */
 528 #define ACL_RECORD_VALUE_STATE do { \
 529                 if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) { \
 530                         state->as_recorded |= ACL_STATE_RECORDED_VD; \
 531                         state->as_vd_acl = a; \
 532                         AC_MEMCPY( state->as_vd_acl_matches, matches, \
 533                                 sizeof( state->as_vd_acl_matches )) ; \
 534                         state->as_vd_acl_count = count; \
 535                         state->as_vd_access = b; \
 536                         state->as_vd_access_count = i; \
 537                 } \
 538         } while( 0 )
 539
 540 /*
 541  * acl_mask - modifies mask based upon the given acl and the
 542  * requested access to entry e, attribute attr, value val.  if val
 543  * is null, access to the whole attribute is assumed (all values).
 544  *
 545  * returns      0       access NOT allowed
 546  *              1       access allowed
 547  */
 548
 549 static slap_control_t
 550 acl_mask(
 551         AccessControl   *a,
 552         slap_mask_t *mask,
 553         Operation       *op,
 554         Entry           *e,
 555         AttributeDescription *desc,
 556         struct berval   *val,
 557         regmatch_t      *matches,
 558         int     count,
 559         AccessControlState *state )
 560 {
 561         int             i, odnlen, patlen;
 562         Access  *b;
 563 #ifdef LDAP_DEBUG
 564         char accessmaskbuf[ACCESSMASK_MAXLEN];
 565 #endif
 566         const char *attr;
 567
 568         assert( a != NULL );
 569         assert( mask != NULL );
 570         assert( desc != NULL );
 571
 572         attr = desc->ad_cname.bv_val;
 573
 574         assert( attr != NULL );
 575
 576 #ifdef NEW_LOGGING
 577         LDAP_LOG( ACL, ENTRY,
 578                 "acl_mask: conn %lu  access to entry \"%s\", attr \"%s\" requested\n",
 579                 op->o_connid, e->e_dn, attr );
 580
 581         LDAP_LOG( ACL, ARGS,
 582                 " to %s by \"%s\", (%s) \n", val ? "value" : "all values",
 583                 op->o_ndn.bv_val ? op->o_ndn.bv_val : "",
 584                 accessmask2str( *mask, accessmaskbuf ) );
 585 #else
 586         Debug( LDAP_DEBUG_ACL,
 587                 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
 588                 e->e_dn, attr, 0 );
 589
 590         Debug( LDAP_DEBUG_ACL,
 591                 "=> acl_mask: to %s by \"%s\", (%s) \n",
 592                 val ? "value" : "all values",
 593                 op->o_ndn.bv_val ?  op->o_ndn.bv_val : "",
 594                 accessmask2str( *mask, accessmaskbuf ) );
 595 #endif
 596
 597         if( state && ( state->as_recorded & ACL_STATE_RECORDED_VD )
 598                 && state->as_vd_acl == a )
 599         {
 600                 b = state->as_vd_access;
 601                 i = state->as_vd_access_count;
 602
 603         } else {
 604                 b = a->acl_access;
 605                 i = 1;
 606         }
 607
 608         for ( ; b != NULL; b = b->a_next, i++ ) {
 609                 slap_mask_t oldmask, modmask;
 610
 611                 ACL_INVALIDATE( modmask );
 612
 613                 /* AND <who> clauses */
 614                 if ( b->a_dn_pat.bv_len != 0 ) {
 615 #ifdef NEW_LOGGING
 616                         LDAP_LOG( ACL, DETAIL1,
 617                                 "acl_mask: conn %lu  check a_dn_pat: %s\n",
 618                                 op->o_connid, b->a_dn_pat.bv_val ,0 );
 619 #else
 620                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
 621                                 b->a_dn_pat.bv_val, 0, 0);
 622 #endif
 623                         /*
 624                          * if access applies to the entry itself, and the
 625                          * user is bound as somebody in the same namespace as
 626                          * the entry, OR the given dn matches the dn pattern
 627                          */
 628                         if ( bvmatch( &b->a_dn_pat, &aci_bv_anonymous ) ) {
 629                                 if ( op->o_ndn.bv_len != 0 ) {
 630                                         continue;
 631                                 }
 632
 633                         } else if ( bvmatch( &b->a_dn_pat, &aci_bv_users ) ) {
 634                                 if ( op->o_ndn.bv_len == 0 ) {
 635                                         continue;
 636                                 }
 637
 638                         } else if ( bvmatch( &b->a_dn_pat, &aci_bv_self ) ) {
 639                                 if ( op->o_ndn.bv_len == 0 ) {
 640                                         continue;
 641                                 }
 642
 643                                 if ( e->e_dn == NULL || !dn_match( &e->e_nname, &op->o_ndn ) ) {
 644                                         continue;
 645                                 }
 646
 647                         } else if ( b->a_dn_style == ACL_STYLE_REGEX ) {
 648                                 if ( !ber_bvccmp( &b->a_dn_pat, '*' ) ) {
 649                                         int ret = regex_matches( &b->a_dn_pat,
 650                                                 op->o_ndn.bv_val, e->e_ndn, matches );
 651
 652                                         if( ret == 0 ) {
 653                                                 continue;
 654                                         }
 655                                 }
 656
 657                         } else {
 658                                 struct berval pat;
 659                                 int got_match = 0;
 660
 661                                 if ( e->e_dn == NULL )
 662                                         continue;
 663
 664                                 if ( b->a_dn_expand ) {
 665                                         struct berval bv;
 666                                         char buf[ACL_BUF_SIZE];
 667
 668                                         bv.bv_len = sizeof( buf ) - 1;
 669                                         bv.bv_val = buf;
 670
 671                                         string_expand(&bv, &b->a_dn_pat,
 672                                                         e->e_ndn, matches);
 673                                         if ( dnNormalize2(NULL, &bv, &pat) != LDAP_SUCCESS ) {
 674                                                 /* did not expand to a valid dn */
 675                                                 continue;
 676                                         }
 677                                 } else {
 678                                         pat = b->a_dn_pat;
 679                                 }
 680
 681                                 patlen = pat.bv_len;
 682                                 odnlen = op->o_ndn.bv_len;
 683                                 if ( odnlen < patlen ) {
 684                                         goto dn_match_cleanup;
 685
 686                                 }
 687
 688                                 if ( b->a_dn_style == ACL_STYLE_BASE ) {
 689                                         /* base dn -- entire object DN must match */
 690                                         if ( odnlen != patlen ) {
 691                                                 goto dn_match_cleanup;
 692                                         }
 693
 694                                 } else if ( b->a_dn_style == ACL_STYLE_ONE ) {
 695                                         int rdnlen = -1;
 696
 697                                         if ( odnlen <= patlen ) {
 698                                                 goto dn_match_cleanup;
 699                                         }
 700
 701                                         if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) {
 702                                                 goto dn_match_cleanup;
 703                                         }
 704
 705                                         rdnlen = dn_rdnlen( NULL, &op->o_ndn );
 706                                         if ( rdnlen != odnlen - patlen - 1 ) {
 707                                                 goto dn_match_cleanup;
 708                                         }
 709
 710                                 } else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) {
 711                                         if ( odnlen > patlen && !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) {
 712                                                 goto dn_match_cleanup;
 713                                         }
 714
 715                                 } else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) {
 716                                         if ( odnlen <= patlen ) {
 717                                                 goto dn_match_cleanup;
 718                                         }
 719
 720                                         if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) {
 721                                                 goto dn_match_cleanup;
 722                                         }
 723                                 }
 724
 725                                 got_match = !strcmp( pat.bv_val, op->o_ndn.bv_val + odnlen - patlen );
 726
 727 dn_match_cleanup:;
 728                                 if ( pat.bv_val != b->a_dn_pat.bv_val ) {
 729                                         free( pat.bv_val );
 730                                 }
 731
 732                                 if ( !got_match ) {
 733                                         continue;
 734                                 }
 735                         }
 736                 }
 737
 738                 if ( b->a_sockurl_pat.bv_len ) {
 739                         if ( ! op->o_conn->c_listener ) {
 740                                 continue;
 741                         }
 742 #ifdef NEW_LOGGING
 743                         LDAP_LOG( ACL, DETAIL1,
 744                                    "acl_mask: conn %lu  check a_sockurl_pat: %s\n",
 745                                    op->o_connid, b->a_sockurl_pat.bv_val , 0 );
 746 #else
 747                         Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
 748                                 b->a_sockurl_pat.bv_val, 0, 0 );
 749 #endif
 750
 751                         if ( !ber_bvccmp( &b->a_sockurl_pat, '*' ) ) {
 752                                 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
 753                                         if (!regex_matches( &b->a_sockurl_pat, op->o_conn->c_listener_url.bv_val,
 754                                                         e->e_ndn, matches ) )
 755                                         {
 756                                                 continue;
 757                                         }
 758                                 } else {
 759                                         if ( ber_bvstrcasecmp( &b->a_sockurl_pat, &op->o_conn->c_listener_url ) != 0 )
 760                                                 continue;
 761                                 }
 762                         }
 763                 }
 764
 765                 if ( b->a_domain_pat.bv_len ) {
 766                         if ( !op->o_conn->c_peer_domain.bv_val ) {
 767                                 continue;
 768                         }
 769 #ifdef NEW_LOGGING
 770                         LDAP_LOG( ACL, DETAIL1,
 771                                    "acl_mask: conn %lu  check a_domain_pat: %s\n",
 772                                    op->o_connid, b->a_domain_pat.bv_val , 0 );
 773 #else
 774                         Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
 775                                 b->a_domain_pat.bv_val, 0, 0 );
 776 #endif
 777                         if ( !ber_bvccmp( &b->a_domain_pat, '*' ) ) {
 778                                 if ( b->a_domain_style == ACL_STYLE_REGEX) {
 779                                         if (!regex_matches( &b->a_domain_pat, op->o_conn->c_peer_domain.bv_val,
 780                                                         e->e_ndn, matches ) )
 781                                         {
 782                                                 continue;
 783                                         }
 784                                 } else {
 785                                         char buf[ACL_BUF_SIZE];
 786
 787                                         struct berval   cmp = op->o_conn->c_peer_domain;
 788                                         struct berval   pat = b->a_domain_pat;
 789
 790                                         if ( b->a_domain_expand ) {
 791                                                 struct berval bv;
 792
 793                                                 bv.bv_len = sizeof(buf) - 1;
 794                                                 bv.bv_val = buf;
 795
 796                                                 string_expand(&bv, &b->a_domain_pat, e->e_ndn, matches);
 797                                                 pat = bv;
 798                                         }
 799
 800                                         if ( b->a_domain_style == ACL_STYLE_SUBTREE ) {
 801                                                 int offset = cmp.bv_len - pat.bv_len;
 802                                                 if ( offset < 0 ) {
 803                                                         continue;
 804                                                 }
 805
 806                                                 if ( offset == 1 || ( offset > 1 && cmp.bv_val[ offset - 1 ] != '.' ) ) {
 807                                                         continue;
 808                                                 }
 809
 810                                                 /* trim the domain */
 811                                                 cmp.bv_val = &cmp.bv_val[ offset ];
 812                                                 cmp.bv_len -= offset;
 813                                         }
 814
 815                                         if ( ber_bvstrcasecmp( &pat, &cmp ) != 0 ) {
 816                                                 continue;
 817                                         }
 818                                 }
 819                         }
 820                 }
 821
 822                 if ( b->a_peername_pat.bv_len ) {
 823                         if ( !op->o_conn->c_peer_name.bv_val ) {
 824                                 continue;
 825                         }
 826 #ifdef NEW_LOGGING
 827                         LDAP_LOG( ACL, DETAIL1,
 828                                    "acl_mask: conn %lu  check a_peername_path: %s\n",
 829                                    op->o_connid, b->a_peername_pat.bv_val , 0 );
 830 #else
 831                         Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
 832                                 b->a_peername_pat.bv_val, 0, 0 );
 833 #endif
 834                         if ( !ber_bvccmp( &b->a_peername_pat, '*' ) ) {
 835                                 if ( b->a_peername_style == ACL_STYLE_REGEX) {
 836                                         if (!regex_matches( &b->a_peername_pat, op->o_conn->c_peer_name.bv_val,
 837                                                         e->e_ndn, matches ) )
 838                                         {
 839                                                 continue;
 840                                         }
 841                                 } else {
 842                                         if ( ber_bvstrcasecmp( &b->a_peername_pat, &op->o_conn->c_peer_name ) != 0 )
 843                                                 continue;
 844                                 }
 845                         }
 846                 }
 847
 848                 if ( b->a_sockname_pat.bv_len ) {
 849                         if ( !op->o_conn->c_sock_name.bv_val ) {
 850                                 continue;
 851                         }
 852 #ifdef NEW_LOGGING
 853                         LDAP_LOG( ACL, DETAIL1,
 854                                    "acl_mask: conn %lu  check a_sockname_path: %s\n",
 855                                    op->o_connid, b->a_sockname_pat.bv_val , 0 );
 856 #else
 857                         Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
 858                                 b->a_sockname_pat.bv_val, 0, 0 );
 859 #endif
 860                         if ( !ber_bvccmp( &b->a_sockname_pat, '*' ) ) {
 861                                 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
 862                                         if (!regex_matches( &b->a_sockname_pat, op->o_conn->c_sock_name.bv_val,
 863                                                         e->e_ndn, matches ) )
 864                                         {
 865                                                 continue;
 866                                         }
 867                                 } else {
 868                                         if ( ber_bvstrcasecmp( &b->a_sockname_pat, &op->o_conn->c_sock_name ) != 0 )
 869                                                 continue;
 870                                 }
 871                         }
 872                 }
 873
 874                 if ( b->a_dn_at != NULL ) {
 875                         Attribute       *at;
 876                         struct berval   bv;
 877                         int rc, match = 0;
 878                         const char *text;
 879                         const char *attr = b->a_dn_at->ad_cname.bv_val;
 880
 881                         assert( attr != NULL );
 882
 883                         if ( op->o_ndn.bv_len == 0 ) {
 884                                 continue;
 885                         }
 886
 887 #ifdef NEW_LOGGING
 888                         LDAP_LOG( ACL, DETAIL1,
 889                                    "acl_mask: conn %lu  check a_dn_pat: %s\n",
 890                                    op->o_connid, attr , 0 );
 891 #else
 892                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
 893                                 attr, 0, 0);
 894 #endif
 895                         bv = op->o_ndn;
 896
 897                         /* see if asker is listed in dnattr */
 898                         for( at = attrs_find( e->e_attrs, b->a_dn_at );
 899                                 at != NULL;
 900                                 at = attrs_find( at->a_next, b->a_dn_at ) )
 901                         {
 902                                 if( value_find_ex( b->a_dn_at,
 903 #ifdef SLAP_NVALUES
 904                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 905                                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 906                                         at->a_nvals,
 907 #else
 908                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 909                                         at->a_vals,
 910 #endif
 911                                         &bv ) == 0 )
 912                                 {
 913                                         /* found it */
 914                                         match = 1;
 915                                         break;
 916                                 }
 917                         }
 918
 919                         if( match ) {
 920                                 /* have a dnattr match. if this is a self clause then
 921                                  * the target must also match the op dn.
 922                                  */
 923                                 if ( b->a_dn_self ) {
 924                                         /* check if the target is an attribute. */
 925                                         if ( val == NULL ) continue;
 926
 927                                         /* target is attribute, check if the attribute value
 928                                          * is the op dn.
 929                                          */
 930                                         rc = value_match( &match, b->a_dn_at,
 931                                                 b->a_dn_at->ad_type->sat_equality, 0,
 932                                                 val, &bv, &text );
 933                                         /* on match error or no match, fail the ACL clause */
 934                                         if (rc != LDAP_SUCCESS || match != 0 )
 935                                                 continue;
 936                                 }
 937                         } else {
 938                                 /* no dnattr match, check if this is a self clause */
 939                                 if ( ! b->a_dn_self )
 940                                         continue;
 941
 942                                 ACL_RECORD_VALUE_STATE;
 943
 944                                 /* this is a self clause, check if the target is an
 945                                  * attribute.
 946                                  */
 947                                 if ( val == NULL )
 948                                         continue;
 949
 950                                 /* target is attribute, check if the attribute value
 951                                  * is the op dn.
 952                                  */
 953                                 rc = value_match( &match, b->a_dn_at,
 954                                         b->a_dn_at->ad_type->sat_equality, 0,
 955                                         val, &bv, &text );
 956
 957                                 /* on match error or no match, fail the ACL clause */
 958                                 if (rc != LDAP_SUCCESS || match != 0 )
 959                                         continue;
 960                         }
 961                 }
 962
 963                 if ( b->a_group_pat.bv_len ) {
 964                         struct berval bv;
 965                         struct berval ndn = { 0, NULL };
 966                         int rc;
 967
 968                         if ( op->o_ndn.bv_len == 0 ) {
 969                                 continue;
 970                         }
 971
 972                         /* b->a_group is an unexpanded entry name, expanded it should be an
 973                          * entry with objectclass group* and we test to see if odn is one of
 974                          * the values in the attribute group
 975                          */
 976                         /* see if asker is listed in dnattr */
 977                         if ( b->a_group_style == ACL_STYLE_REGEX ) {
 978                                 char buf[ACL_BUF_SIZE];
 979                                 bv.bv_len = sizeof(buf) - 1;
 980                                 bv.bv_val = buf;
 981
 982                                 string_expand( &bv, &b->a_group_pat, e->e_ndn, matches );
 983                                 if ( dnNormalize2( NULL, &bv, &ndn ) != LDAP_SUCCESS ) {
 984                                         /* did not expand to a valid dn */
 985                                         continue;
 986                                 }
 987
 988                                 bv = ndn;
 989
 990                         } else {
 991                                 bv = b->a_group_pat;
 992                         }
 993
 994                         rc = backend_group( op, e, &bv, &op->o_ndn,
 995                                 b->a_group_oc, b->a_group_at );
 996
 997                         if ( ndn.bv_val ) free( ndn.bv_val );
 998
 999                         if ( rc != 0 ) {
1000                                 continue;
1001                         }
1002                 }
1003
1004                 if ( b->a_set_pat.bv_len != 0 ) {
1005                         struct berval bv;
1006                         char buf[ACL_BUF_SIZE];
1007                         if( b->a_set_style == ACL_STYLE_REGEX ){
1008                                 bv.bv_len = sizeof(buf) - 1;
1009                                 bv.bv_val = buf;
1010                                 string_expand( &bv, &b->a_set_pat, e->e_ndn, matches );
1011                         }else{
1012                                 bv = b->a_set_pat;
1013                         }
1014                         if (aci_match_set( &bv, op, e, 0 ) == 0) {
1015                                 continue;
1016                         }
1017                 }
1018
1019                 if ( b->a_authz.sai_ssf ) {
1020 #ifdef NEW_LOGGING
1021                         LDAP_LOG( ACL, DETAIL1,
1022                                 "acl_mask: conn %lu  check a_authz.sai_ssf: ACL %u > OP %u\n",
1023                                 op->o_connid, b->a_authz.sai_ssf, op->o_ssf  );
1024 #else
1025                         Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
1026                                 b->a_authz.sai_ssf, op->o_ssf, 0 );
1027 #endif
1028                         if ( b->a_authz.sai_ssf >  op->o_ssf ) {
1029                                 continue;
1030                         }
1031                 }
1032
1033                 if ( b->a_authz.sai_transport_ssf ) {
1034 #ifdef NEW_LOGGING
1035                         LDAP_LOG( ACL, DETAIL1,
1036                                 "acl_mask: conn %lu  check a_authz.sai_transport_ssf: "
1037                                 "ACL %u > OP %u\n",
1038                                 op->o_connid, b->a_authz.sai_transport_ssf,
1039                                 op->o_transport_ssf  );
1040 #else
1041                         Debug( LDAP_DEBUG_ACL,
1042                                 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
1043                                 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
1044 #endif
1045                         if ( b->a_authz.sai_transport_ssf >  op->o_transport_ssf ) {
1046                                 continue;
1047                         }
1048                 }
1049
1050                 if ( b->a_authz.sai_tls_ssf ) {
1051 #ifdef NEW_LOGGING
1052                         LDAP_LOG( ACL, DETAIL1,
1053                                 "acl_mask: conn %lu  check a_authz.sai_tls_ssf: ACL %u > "
1054                                 "OP %u\n",
1055                                 op->o_connid, b->a_authz.sai_tls_ssf, op->o_tls_ssf  );
1056 #else
1057                         Debug( LDAP_DEBUG_ACL,
1058                                 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
1059                                 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
1060 #endif
1061                         if ( b->a_authz.sai_tls_ssf >  op->o_tls_ssf ) {
1062                                 continue;
1063                         }
1064                 }
1065
1066                 if ( b->a_authz.sai_sasl_ssf ) {
1067 #ifdef NEW_LOGGING
1068                         LDAP_LOG( ACL, DETAIL1,
1069                            "acl_mask: conn %lu check a_authz.sai_sasl_ssf: "
1070                            "ACL %u > OP %u\n",
1071                                 op->o_connid, b->a_authz.sai_sasl_ssf, op->o_sasl_ssf );
1072 #else
1073                         Debug( LDAP_DEBUG_ACL,
1074                                 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
1075                                 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
1076 #endif
1077                         if ( b->a_authz.sai_sasl_ssf >  op->o_sasl_ssf ) {
1078                                 continue;
1079                         }
1080                 }
1081
1082 #ifdef SLAPD_ACI_ENABLED
1083                 if ( b->a_aci_at != NULL ) {
1084                         Attribute       *at;
1085                         slap_access_t grant, deny, tgrant, tdeny;
1086
1087                         /* this case works different from the others above.
1088                          * since aci's themselves give permissions, we need
1089                          * to first check b->a_access_mask, the ACL's access level.
1090                          */
1091
1092                         if ( e->e_nname.bv_len == 0 ) {
1093                                 /* no ACIs in the root DSE */
1094                                 continue;
1095                         }
1096
1097                         /* first check if the right being requested
1098                          * is allowed by the ACL clause.
1099                          */
1100                         if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
1101                                 continue;
1102                         }
1103
1104                         /* get the aci attribute */
1105                         at = attr_find( e->e_attrs, b->a_aci_at );
1106                         if ( at == NULL ) {
1107                                 continue;
1108                         }
1109
1110                         ACL_RECORD_VALUE_STATE;
1111
1112                         /* start out with nothing granted, nothing denied */
1113                         ACL_INIT(tgrant);
1114                         ACL_INIT(tdeny);
1115
1116                         /* the aci is an multi-valued attribute.  The
1117                          * rights are determined by OR'ing the individual
1118                          * rights given by the acis.
1119                          */
1120                         for ( i = 0; at->a_vals[i].bv_val != NULL; i++ ) {
1121                                 if (aci_mask( op,
1122                                         e, desc, val,
1123 #ifdef SLAP_NVALUES
1124                                         &at->a_nvals[i],
1125 #else
1126                                         &at->a_vals[i],
1127 #endif
1128                                         matches, &grant, &deny ) != 0)
1129                                 {
1130                                         tgrant |= grant;
1131                                         tdeny |= deny;
1132                                 }
1133                         }
1134
1135                         /* remove anything that the ACL clause does not allow */
1136                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
1137                         tdeny &= ACL_PRIV_MASK;
1138
1139                         /* see if we have anything to contribute */
1140                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
1141                                 continue;
1142                         }
1143
1144                         /* this could be improved by changing acl_mask so that it can deal with
1145                          * by clauses that return grant/deny pairs.  Right now, it does either
1146                          * additive or subtractive rights, but not both at the same time.  So,
1147                          * we need to combine the grant/deny pair into a single rights mask in
1148                          * a smart way:  if either grant or deny is "empty", then we use the
1149                          * opposite as is, otherwise we remove any denied rights from the grant
1150                          * rights mask and construct an additive mask.
1151                          */
1152                         if (ACL_IS_INVALID(tdeny)) {
1153                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
1154
1155                         } else if (ACL_IS_INVALID(tgrant)) {
1156                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
1157
1158                         } else {
1159                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
1160                         }
1161
1162                 } else
1163 #endif
1164                 {
1165                         modmask = b->a_access_mask;
1166                 }
1167
1168 #ifdef NEW_LOGGING
1169                 LDAP_LOG( ACL, RESULTS,
1170                            "acl_mask: [%d] applying %s (%s)\n",
1171                            i, accessmask2str( modmask, accessmaskbuf),
1172                            b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK
1173                            ? "break" : "stop"  );
1174 #else
1175                 Debug( LDAP_DEBUG_ACL,
1176                         "<= acl_mask: [%d] applying %s (%s)\n",
1177                         i, accessmask2str( modmask, accessmaskbuf ),
1178                         b->a_type == ACL_CONTINUE
1179                                 ? "continue"
1180                                 : b->a_type == ACL_BREAK
1181                                         ? "break"
1182                                         : "stop" );
1183 #endif
1184                 /* save old mask */
1185                 oldmask = *mask;
1186
1187                 if( ACL_IS_ADDITIVE(modmask) ) {
1188                         /* add privs */
1189                         ACL_PRIV_SET( *mask, modmask );
1190
1191                         /* cleanup */
1192                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
1193
1194                 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
1195                         /* substract privs */
1196                         ACL_PRIV_CLR( *mask, modmask );
1197
1198                         /* cleanup */
1199                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
1200
1201                 } else {
1202                         /* assign privs */
1203                         *mask = modmask;
1204                 }
1205
1206 #ifdef NEW_LOGGING
1207                 LDAP_LOG( ACL, DETAIL1,
1208                            "acl_mask: conn %lu  [%d] mask: %s\n",
1209                            op->o_connid, i, accessmask2str( *mask, accessmaskbuf)  );
1210 #else
1211                 Debug( LDAP_DEBUG_ACL,
1212                         "<= acl_mask: [%d] mask: %s\n",
1213                         i, accessmask2str(*mask, accessmaskbuf), 0 );
1214 #endif
1215
1216                 if( b->a_type == ACL_CONTINUE ) {
1217                         continue;
1218
1219                 } else if ( b->a_type == ACL_BREAK ) {
1220                         return ACL_BREAK;
1221
1222                 } else {
1223                         return ACL_STOP;
1224                 }
1225         }
1226
1227         /* implicit "by * none" clause */
1228         ACL_INIT(*mask);
1229
1230 #ifdef NEW_LOGGING
1231         LDAP_LOG( ACL, RESULTS,
1232                    "acl_mask: conn %lu  no more <who> clauses, returning %d (stop)\n",
1233                    op->o_connid, accessmask2str( *mask, accessmaskbuf) , 0 );
1234 #else
1235         Debug( LDAP_DEBUG_ACL,
1236                 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
1237                 accessmask2str(*mask, accessmaskbuf), 0, 0 );
1238 #endif
1239         return ACL_STOP;
1240 }
1241
1242 /*
1243  * acl_check_modlist - check access control on the given entry to see if
1244  * it allows the given modifications by the user associated with op.
1245  * returns      1       if mods allowed ok
1246  *                      0       mods not allowed
1247  */
1248
1249 int
1250 acl_check_modlist(
1251         Operation       *op,
1252         Entry   *e,
1253         Modifications   *mlist
1254 )
1255 {
1256         struct berval *bv;
1257         AccessControlState state = ACL_STATE_INIT;
1258
1259         assert( op->o_bd != NULL );
1260
1261         /* short circuit root database access */
1262         if ( be_isroot( op->o_bd, &op->o_ndn ) ) {
1263 #ifdef NEW_LOGGING
1264                 LDAP_LOG( ACL, DETAIL1,
1265                            "acl_check_modlist: conn %lu  access granted to root user\n",
1266                            op->o_connid, 0, 0 );
1267 #else
1268                 Debug( LDAP_DEBUG_ACL,
1269                         "<= acl_access_allowed: granted to database root\n",
1270                     0, 0, 0 );
1271 #endif
1272                 return 1;
1273         }
1274
1275         /* use backend default access if no backend acls */
1276         if( op->o_bd != NULL && op->o_bd->be_acl == NULL ) {
1277 #ifdef NEW_LOGGING
1278                 LDAP_LOG( ACL, DETAIL1,
1279                         "acl_check_modlist: backend default %s access %s to \"%s\"\n",
1280                         access2str( ACL_WRITE ),
1281                         op->o_bd->be_dfltaccess >= ACL_WRITE ? "granted" : "denied",
1282                         op->o_dn.bv_val  );
1283 #else
1284                 Debug( LDAP_DEBUG_ACL,
1285                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
1286                         access2str( ACL_WRITE ),
1287                         op->o_bd->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn.bv_val );
1288 #endif
1289                 return op->o_bd->be_dfltaccess >= ACL_WRITE;
1290
1291 #ifdef notdef
1292         /* op->o_bd is always non-NULL */
1293         /* use global default access if no global acls */
1294         } else if ( op->o_bd == NULL && global_acl == NULL ) {
1295 #ifdef NEW_LOGGING
1296                 LDAP_LOG( ACL, DETAIL1,
1297                         "acl_check_modlist: global default %s access %s to \"%s\"\n",
1298                    access2str( ACL_WRITE ),
1299                    global_default_access >= ACL_WRITE ? "granted" : "denied",
1300                    op->o_dn  );
1301 #else
1302                 Debug( LDAP_DEBUG_ACL,
1303                         "=> access_allowed: global default %s access %s to \"%s\"\n",
1304                         access2str( ACL_WRITE ),
1305                         global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1306 #endif
1307                 return global_default_access >= ACL_WRITE;
1308 #endif
1309         }
1310
1311         for ( ; mlist != NULL; mlist = mlist->sml_next ) {
1312                 /*
1313                  * no-user-modification operational attributes are ignored
1314                  * by ACL_WRITE checking as any found here are not provided
1315                  * by the user
1316                  */
1317                 if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) {
1318 #ifdef NEW_LOGGING
1319                         LDAP_LOG( ACL, DETAIL1,
1320                                    "acl_check_modlist: conn %lu  no-user-mod %s: modify access granted\n",
1321                                    op->o_connid, mlist->sml_desc->ad_cname.bv_val , 0 );
1322 #else
1323                         Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
1324                                 " modify access granted\n",
1325                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1326 #endif
1327                         continue;
1328                 }
1329
1330                 switch ( mlist->sml_op ) {
1331                 case LDAP_MOD_REPLACE:
1332                         /*
1333                          * We must check both permission to delete the whole
1334                          * attribute and permission to add the specific attributes.
1335                          * This prevents abuse from selfwriters.
1336                          */
1337                         if ( ! access_allowed( op, e,
1338                                 mlist->sml_desc, NULL, ACL_WRITE, &state ) )
1339                         {
1340                                 return( 0 );
1341                         }
1342
1343                         if ( mlist->sml_bvalues == NULL ) break;
1344
1345                         /* fall thru to check value to add */
1346
1347                 case LDAP_MOD_ADD:
1348                         assert( mlist->sml_bvalues != NULL );
1349
1350 #ifdef SLAP_NVALUES
1351                         for ( bv = mlist->sml_nvalues
1352                                         ? mlist->sml_nvalues : mlist->sml_values;
1353                                 bv->bv_val != NULL; bv++ )
1354 #else
1355                         for ( bv = mlist->sml_bvalues; bv->bv_val != NULL; bv++ )
1356 #endif
1357                         {
1358                                 if ( ! access_allowed( op, e,
1359                                         mlist->sml_desc, bv, ACL_WRITE, &state ) )
1360                                 {
1361                                         return( 0 );
1362                                 }
1363                         }
1364                         break;
1365
1366                 case LDAP_MOD_DELETE:
1367                         if ( mlist->sml_bvalues == NULL ) {
1368                                 if ( ! access_allowed( op, e,
1369                                         mlist->sml_desc, NULL, ACL_WRITE, NULL ) )
1370                                 {
1371                                         return( 0 );
1372                                 }
1373                                 break;
1374                         }
1375 #ifdef SLAP_NVALUES
1376                         for ( bv = mlist->sml_nvalues
1377                                         ? mlist->sml_nvalues : mlist->sml_values;
1378                                 bv->bv_val != NULL; bv++ )
1379 #else
1380                         for ( bv = mlist->sml_bvalues; bv->bv_val != NULL; bv++ )
1381 #endif
1382                         {
1383                                 if ( ! access_allowed( op, e,
1384                                         mlist->sml_desc, bv, ACL_WRITE, &state ) )
1385                                 {
1386                                         return( 0 );
1387                                 }
1388                         }
1389                         break;
1390
1391                 case SLAP_MOD_SOFTADD:
1392                         /* allow adding attribute via modrdn thru */
1393                         break;
1394
1395                 default:
1396                         assert( 0 );
1397                         return( 0 );
1398                 }
1399         }
1400
1401         return( 1 );
1402 }
1403
1404 static int
1405 aci_get_part(
1406         struct berval *list,
1407         int ix,
1408         char sep,
1409         struct berval *bv )
1410 {
1411         int len;
1412         char *p;
1413
1414         if (bv) {
1415                 bv->bv_len = 0;
1416                 bv->bv_val = NULL;
1417         }
1418         len = list->bv_len;
1419         p = list->bv_val;
1420         while (len >= 0 && --ix >= 0) {
1421                 while (--len >= 0 && *p++ != sep) ;
1422         }
1423         while (len >= 0 && *p == ' ') {
1424                 len--;
1425                 p++;
1426         }
1427         if (len < 0)
1428                 return(-1);
1429
1430         if (!bv)
1431                 return(0);
1432
1433         bv->bv_val = p;
1434         while (--len >= 0 && *p != sep) {
1435                 bv->bv_len++;
1436                 p++;
1437         }
1438         while (bv->bv_len > 0 && *--p == ' ')
1439                 bv->bv_len--;
1440         return(bv->bv_len);
1441 }
1442
1443 BerVarray
1444 aci_set_gather (void *cookie, struct berval *name, struct berval *attr)
1445 {
1446         AciSetCookie *cp = cookie;
1447         BerVarray bvals = NULL;
1448         struct berval ndn;
1449
1450         /* this routine needs to return the bervals instead of
1451          * plain strings, since syntax is not known.  It should
1452          * also return the syntax or some "comparison cookie".
1453          */
1454
1455         if (dnNormalize2(NULL, name, &ndn) == LDAP_SUCCESS) {
1456                 const char *text;
1457                 AttributeDescription *desc = NULL;
1458                 if (slap_bv2ad(attr, &desc, &text) == LDAP_SUCCESS) {
1459                         backend_attribute(cp->op,
1460                                 cp->e, &ndn, desc, &bvals);
1461                 }
1462                 free(ndn.bv_val);
1463         }
1464         return(bvals);
1465 }
1466
1467 static int
1468 aci_match_set (
1469         struct berval *subj,
1470         Operation *op,
1471         Entry *e,
1472         int setref
1473 )
1474 {
1475         struct berval set = { 0, NULL };
1476         int rc = 0;
1477         AciSetCookie cookie;
1478
1479         if (setref == 0) {
1480                 ber_dupbv( &set, subj );
1481         } else {
1482                 struct berval subjdn, ndn = { 0, NULL };
1483                 struct berval setat;
1484                 BerVarray bvals;
1485                 const char *text;
1486                 AttributeDescription *desc = NULL;
1487
1488                 /* format of string is "entry/setAttrName" */
1489                 if (aci_get_part(subj, 0, '/', &subjdn) < 0) {
1490                         return(0);
1491                 }
1492
1493                 if ( aci_get_part(subj, 1, '/', &setat) < 0 ) {
1494                         setat.bv_val = SLAPD_ACI_SET_ATTR;
1495                         setat.bv_len = sizeof(SLAPD_ACI_SET_ATTR)-1;
1496                 }
1497
1498                 if ( setat.bv_val != NULL ) {
1499                         /*
1500                          * NOTE: dnNormalize2 honors the ber_len field
1501                          * as the length of the dn to be normalized
1502                          */
1503                         if ( dnNormalize2(NULL, &subjdn, &ndn) == LDAP_SUCCESS
1504                                 && slap_bv2ad(&setat, &desc, &text) == LDAP_SUCCESS )
1505                         {
1506                                 backend_attribute(op, e,
1507                                         &ndn, desc, &bvals);
1508                                 if ( bvals != NULL ) {
1509                                         if ( bvals[0].bv_val != NULL ) {
1510                                                 int i;
1511                                                 set = bvals[0];
1512                                                 bvals[0].bv_val = NULL;
1513                                                 for (i=1;bvals[i].bv_val;i++);
1514                                                 bvals[0].bv_val = bvals[i-1].bv_val;
1515                                                 bvals[i-1].bv_val = NULL;
1516                                         }
1517                                         ber_bvarray_free(bvals);
1518                                 }
1519                         }
1520                         if (ndn.bv_val)
1521                                 free(ndn.bv_val);
1522                 }
1523         }
1524
1525         if (set.bv_val != NULL) {
1526                 cookie.op = op;
1527                 cookie.e = e;
1528                 rc = (slap_set_filter(aci_set_gather, &cookie, &set,
1529                         &op->o_ndn, &e->e_nname, NULL) > 0);
1530                 ch_free(set.bv_val);
1531         }
1532         return(rc);
1533 }
1534
1535 #ifdef SLAPD_ACI_ENABLED
1536 static int
1537 aci_list_map_rights(
1538         struct berval *list )
1539 {
1540         struct berval bv;
1541         slap_access_t mask;
1542         int i;
1543
1544         ACL_INIT(mask);
1545         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1546                 if (bv.bv_len <= 0)
1547                         continue;
1548                 switch (*bv.bv_val) {
1549                 case 'c':
1550                         ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
1551                         break;
1552                 case 's':
1553                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines
1554                          * the right 's' to mean "set", but in the examples states
1555                          * that the right 's' means "search".  The latter definition
1556                          * is used here.
1557                          */
1558                         ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
1559                         break;
1560                 case 'r':
1561                         ACL_PRIV_SET(mask, ACL_PRIV_READ);
1562                         break;
1563                 case 'w':
1564                         ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
1565                         break;
1566                 case 'x':
1567                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not
1568                          * define any equivalent to the AUTH right, so I've just used
1569                          * 'x' for now.
1570                          */
1571                         ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
1572                         break;
1573                 default:
1574                         break;
1575                 }
1576
1577         }
1578         return(mask);
1579 }
1580
1581 static int
1582 aci_list_has_attr(
1583         struct berval *list,
1584         const struct berval *attr,
1585         struct berval *val )
1586 {
1587         struct berval bv, left, right;
1588         int i;
1589
1590         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1591                 if (aci_get_part(&bv, 0, '=', &left) < 0
1592                         || aci_get_part(&bv, 1, '=', &right) < 0)
1593                 {
1594                         if (ber_bvstrcasecmp(attr, &bv) == 0)
1595                                 return(1);
1596                 } else if (val == NULL) {
1597                         if (ber_bvstrcasecmp(attr, &left) == 0)
1598                                 return(1);
1599                 } else {
1600                         if (ber_bvstrcasecmp(attr, &left) == 0) {
1601                                 /* this is experimental code that implements a
1602                                  * simple (prefix) match of the attribute value.
1603                                  * the ACI draft does not provide for aci's that
1604                                  * apply to specific values, but it would be
1605                                  * nice to have.  If the <attr> part of an aci's
1606                                  * rights list is of the form <attr>=<value>,
1607                                  * that means the aci applies only to attrs with
1608                                  * the given value.  Furthermore, if the attr is
1609                                  * of the form <attr>=<value>*, then <value> is
1610                                  * treated as a prefix, and the aci applies to
1611                                  * any value with that prefix.
1612                                  *
1613                                  * Ideally, this would allow r.e. matches.
1614                                  */
1615                                 if (aci_get_part(&right, 0, '*', &left) < 0
1616                                         || right.bv_len <= left.bv_len)
1617                                 {
1618                                         if (ber_bvstrcasecmp(val, &right) == 0)
1619                                                 return(1);
1620                                 } else if (val->bv_len >= left.bv_len) {
1621                                         if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0)
1622                                                 return(1);
1623                                 }
1624                         }
1625                 }
1626         }
1627         return(0);
1628 }
1629
1630 static slap_access_t
1631 aci_list_get_attr_rights(
1632         struct berval *list,
1633         const struct berval *attr,
1634         struct berval *val )
1635 {
1636     struct berval bv;
1637     slap_access_t mask;
1638     int i;
1639
1640         /* loop through each rights/attr pair, skip first part (action) */
1641         ACL_INIT(mask);
1642         for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
1643                 if (aci_list_has_attr(&bv, attr, val) == 0)
1644                         continue;
1645                 if (aci_get_part(list, i, ';', &bv) < 0)
1646                         continue;
1647                 mask |= aci_list_map_rights(&bv);
1648         }
1649         return(mask);
1650 }
1651
1652 static int
1653 aci_list_get_rights(
1654         struct berval *list,
1655         const struct berval *attr,
1656         struct berval *val,
1657         slap_access_t *grant,
1658         slap_access_t *deny )
1659 {
1660     struct berval perm, actn;
1661     slap_access_t *mask;
1662     int i, found;
1663
1664         if (attr == NULL || attr->bv_len == 0
1665                         || ber_bvstrcasecmp( attr, &aci_bv_entry ) == 0) {
1666                 attr = &aci_bv_br_entry;
1667         }
1668
1669         found = 0;
1670         ACL_INIT(*grant);
1671         ACL_INIT(*deny);
1672         /* loop through each permissions clause */
1673         for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) {
1674                 if (aci_get_part(&perm, 0, ';', &actn) < 0)
1675                         continue;
1676                 if (ber_bvstrcasecmp( &aci_bv_grant, &actn ) == 0) {
1677                         mask = grant;
1678                 } else if (ber_bvstrcasecmp( &aci_bv_deny, &actn ) == 0) {
1679                         mask = deny;
1680                 } else {
1681                         continue;
1682                 }
1683
1684                 found = 1;
1685                 *mask |= aci_list_get_attr_rights(&perm, attr, val);
1686                 *mask |= aci_list_get_attr_rights(&perm, &aci_bv_br_all, NULL);
1687         }
1688         return(found);
1689 }
1690
1691 static int
1692 aci_group_member (
1693         struct berval *subj,
1694         struct berval *defgrpoc,
1695         struct berval *defgrpat,
1696         Operation               *op,
1697         Entry           *e,
1698         regmatch_t      *matches
1699 )
1700 {
1701         struct berval subjdn;
1702         struct berval grpoc;
1703         struct berval grpat;
1704         ObjectClass *grp_oc = NULL;
1705         AttributeDescription *grp_ad = NULL;
1706         const char *text;
1707         int rc;
1708
1709         /* format of string is "group/objectClassValue/groupAttrName" */
1710         if (aci_get_part(subj, 0, '/', &subjdn) < 0) {
1711                 return(0);
1712         }
1713
1714         if (aci_get_part(subj, 1, '/', &grpoc) < 0) {
1715                 grpoc = *defgrpoc;
1716         }
1717
1718         if (aci_get_part(subj, 2, '/', &grpat) < 0) {
1719                 grpat = *defgrpat;
1720         }
1721
1722         rc = slap_bv2ad( &grpat, &grp_ad, &text );
1723         if( rc != LDAP_SUCCESS ) {
1724                 rc = 0;
1725                 goto done;
1726         }
1727         rc = 0;
1728
1729         grp_oc = oc_bvfind( &grpoc );
1730
1731         if (grp_oc != NULL && grp_ad != NULL ) {
1732                 char buf[ACL_BUF_SIZE];
1733                 struct berval bv, ndn;
1734                 bv.bv_len = sizeof( buf ) - 1;
1735                 bv.bv_val = (char *)&buf;
1736                 string_expand(&bv, &subjdn, e->e_ndn, matches);
1737                 if ( dnNormalize2(NULL, &bv, &ndn) == LDAP_SUCCESS ) {
1738                         rc = (backend_group(op, e, &ndn, &op->o_ndn,
1739                                 grp_oc, grp_ad) == 0);
1740                         free( ndn.bv_val );
1741                 }
1742         }
1743
1744 done:
1745         return(rc);
1746 }
1747
1748 static int
1749 aci_mask(
1750     Operation           *op,
1751     Entry                       *e,
1752         AttributeDescription *desc,
1753     struct berval       *val,
1754     struct berval       *aci,
1755         regmatch_t              *matches,
1756         slap_access_t   *grant,
1757         slap_access_t   *deny
1758 )
1759 {
1760     struct berval bv, perms, sdn;
1761         int rc;
1762
1763
1764         assert( desc->ad_cname.bv_val != NULL );
1765
1766         /* parse an aci of the form:
1767                 oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN
1768
1769            See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
1770            a full description of the format for this attribute.
1771            Differences: "this" in the draft is "self" here, and
1772            "self" and "public" is in the position of dnType.
1773
1774            For now, this routine only supports scope=entry.
1775          */
1776
1777         /* check that the aci has all 5 components */
1778         if (aci_get_part(aci, 4, '#', NULL) < 0)
1779                 return(0);
1780
1781         /* check that the aci family is supported */
1782         if (aci_get_part(aci, 0, '#', &bv) < 0)
1783                 return(0);
1784
1785         /* check that the scope is "entry" */
1786         if (aci_get_part(aci, 1, '#', &bv) < 0
1787                 || ber_bvstrcasecmp( &aci_bv_entry, &bv ) != 0)
1788         {
1789                 return(0);
1790         }
1791
1792         /* get the list of permissions clauses, bail if empty */
1793         if (aci_get_part(aci, 2, '#', &perms) <= 0)
1794                 return(0);
1795
1796         /* check if any permissions allow desired access */
1797         if (aci_list_get_rights(&perms, &desc->ad_cname, val, grant, deny) == 0)
1798                 return(0);
1799
1800         /* see if we have a DN match */
1801         if (aci_get_part(aci, 3, '#', &bv) < 0)
1802                 return(0);
1803
1804         if (aci_get_part(aci, 4, '#', &sdn) < 0)
1805                 return(0);
1806
1807         if (ber_bvstrcasecmp( &aci_bv_access_id, &bv ) == 0) {
1808                 struct berval ndn;
1809                 rc = 0;
1810                 if ( dnNormalize2(NULL, &sdn, &ndn) == LDAP_SUCCESS ) {
1811                         if (dn_match( &op->o_ndn, &ndn))
1812                                 rc = 1;
1813                         free(ndn.bv_val);
1814                 }
1815                 return (rc);
1816
1817         } else if (ber_bvstrcasecmp( &aci_bv_public, &bv ) == 0) {
1818                 return(1);
1819
1820         } else if (ber_bvstrcasecmp( &aci_bv_self, &bv ) == 0) {
1821                 if (dn_match(&op->o_ndn, &e->e_nname))
1822                         return(1);
1823
1824         } else if (ber_bvstrcasecmp( &aci_bv_dnattr, &bv ) == 0) {
1825                 Attribute *at;
1826                 AttributeDescription *ad = NULL;
1827                 const char *text;
1828
1829                 rc = slap_bv2ad( &sdn, &ad, &text );
1830
1831                 if( rc != LDAP_SUCCESS ) {
1832                         return 0;
1833                 }
1834
1835                 rc = 0;
1836
1837                 bv = op->o_ndn;
1838
1839                 for(at = attrs_find( e->e_attrs, ad );
1840                         at != NULL;
1841                         at = attrs_find( at->a_next, ad ) )
1842                 {
1843                         if (value_find_ex( ad,
1844 #ifdef SLAP_NVALUES
1845                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1846                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1847                                 at->a_nvals,
1848 #else
1849                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1850                                 at->a_vals,
1851 #endif
1852                                 &bv) == 0 )
1853                         {
1854                                 rc = 1;
1855                                 break;
1856                         }
1857                 }
1858
1859                 return rc;
1860
1861
1862         } else if (ber_bvstrcasecmp( &aci_bv_group, &bv ) == 0) {
1863                 if (aci_group_member(&sdn, &aci_bv_group_class, &aci_bv_group_attr, op, e, matches))
1864                         return(1);
1865
1866         } else if (ber_bvstrcasecmp( &aci_bv_role, &bv ) == 0) {
1867                 if (aci_group_member(&sdn, &aci_bv_role_class, &aci_bv_role_attr, op, e, matches))
1868                         return(1);
1869
1870         } else if (ber_bvstrcasecmp( &aci_bv_set, &bv ) == 0) {
1871                 if (aci_match_set(&sdn, op, e, 0))
1872                         return(1);
1873
1874         } else if (ber_bvstrcasecmp( &aci_bv_set_ref, &bv ) == 0) {
1875                 if (aci_match_set(&sdn, op, e, 1))
1876                         return(1);
1877
1878         }
1879
1880         return(0);
1881 }
1882
1883 #endif  /* SLAPD_ACI_ENABLED */
1884
1885 static void
1886 string_expand(
1887         struct berval *bv,
1888         struct berval *pat,
1889         char *match,
1890         regmatch_t *matches)
1891 {
1892         ber_len_t       size;
1893         char   *sp;
1894         char   *dp;
1895         int     flag;
1896
1897         size = 0;
1898         bv->bv_val[0] = '\0';
1899         bv->bv_len--; /* leave space for lone $ */
1900
1901         flag = 0;
1902         for ( dp = bv->bv_val, sp = pat->bv_val; size < bv->bv_len &&
1903                 sp < pat->bv_val + pat->bv_len ; sp++ )
1904         {
1905                 /* did we previously see a $ */
1906                 if ( flag ) {
1907                         if ( flag == 1 && *sp == '$' ) {
1908                                 *dp++ = '$';
1909                                 size++;
1910                                 flag = 0;
1911
1912                         } else if ( flag == 1 && *sp == '{' /*'}'*/) {
1913                                 flag = 2;
1914
1915                         } else if ( *sp >= '0' && *sp <= '9' ) {
1916                                 int     n;
1917                                 int     i;
1918                                 int     l;
1919
1920                                 n = *sp - '0';
1921
1922                                 if ( flag == 2 ) {
1923                                         for ( sp++; *sp != '\0' && *sp != /*'{'*/ '}'; sp++ ) {
1924                                                 if ( *sp >= '0' && *sp <= '9' ) {
1925                                                         n = 10*n + ( *sp - '0' );
1926                                                 }
1927                                         }
1928
1929                                         if ( *sp != /*'{'*/ '}' ) {
1930                                                 /* error */
1931                                         }
1932                                 }
1933
1934                                 if ( n >= MAXREMATCHES ) {
1935
1936                                 }
1937
1938                                 *dp = '\0';
1939                                 i = matches[n].rm_so;
1940                                 l = matches[n].rm_eo;
1941                                 for ( ; size < bv->bv_len && i < l; size++, i++ ) {
1942                                         *dp++ = match[i];
1943                                 }
1944                                 *dp = '\0';
1945
1946                                 flag = 0;
1947                         }
1948                 } else {
1949                         if (*sp == '$') {
1950                                 flag = 1;
1951                         } else {
1952                                 *dp++ = *sp;
1953                                 size++;
1954                         }
1955                 }
1956         }
1957
1958         if ( flag ) {
1959                 /* must have ended with a single $ */
1960                 *dp++ = '$';
1961                 size++;
1962         }
1963
1964         *dp = '\0';
1965         bv->bv_len = size;
1966
1967 #ifdef NEW_LOGGING
1968         LDAP_LOG( ACL, DETAIL1,
1969            "string_expand:  pattern = %.*s\n", (int)pat->bv_len, pat->bv_val, 0 );
1970         LDAP_LOG( ACL, DETAIL1, "string_expand:  expanded = %s\n", bv->bv_val, 0, 0 );
1971 #else
1972         Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern:  %.*s\n", (int)pat->bv_len, pat->bv_val, 0 );
1973         Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", bv->bv_val, 0, 0 );
1974 #endif
1975 }
1976
1977 static int
1978 regex_matches(
1979         struct berval *pat,                     /* pattern to expand and match against */
1980         char *str,                              /* string to match against pattern */
1981         char *buf,                              /* buffer with $N expansion variables */
1982         regmatch_t *matches             /* offsets in buffer for $N expansion variables */
1983 )
1984 {
1985         regex_t re;
1986         char newbuf[ACL_BUF_SIZE];
1987         struct berval bv;
1988         int     rc;
1989
1990         bv.bv_len = sizeof(newbuf) - 1;
1991         bv.bv_val = newbuf;
1992
1993         if(str == NULL) str = "";
1994
1995         string_expand(&bv, pat, buf, matches);
1996         if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) {
1997                 char error[ACL_BUF_SIZE];
1998                 regerror(rc, &re, error, sizeof(error));
1999
2000 #ifdef NEW_LOGGING
2001                 LDAP_LOG( ACL, ERR,
2002                            "regex_matches: compile( \"%s\", \"%s\") failed %s\n",
2003                            pat->bv_val, str, error  );
2004 #else
2005                 Debug( LDAP_DEBUG_TRACE,
2006                     "compile( \"%s\", \"%s\") failed %s\n",
2007                         pat->bv_val, str, error );
2008 #endif
2009                 return( 0 );
2010         }
2011
2012         rc = regexec(&re, str, 0, NULL, 0);
2013         regfree( &re );
2014
2015 #ifdef NEW_LOGGING
2016         LDAP_LOG( ACL, DETAIL2, "regex_matches: string:   %s\n", str, 0, 0 );
2017         LDAP_LOG( ACL, DETAIL2, "regex_matches: rc:     %d  %s\n",
2018                    rc, rc ? "matches" : "no matches", 0  );
2019 #else
2020         Debug( LDAP_DEBUG_TRACE,
2021             "=> regex_matches: string:   %s\n", str, 0, 0 );
2022         Debug( LDAP_DEBUG_TRACE,
2023             "=> regex_matches: rc: %d %s\n",
2024                 rc, !rc ? "matches" : "no matches", 0 );
2025 #endif
2026         return( !rc );
2027 }
2028