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