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