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 1998-2000 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
  19 static AccessControl * acl_get(
  20         AccessControl *ac, int *count,
  21         Backend *be, Operation *op,
  22         Entry *e,
  23         AttributeDescription *desc,
  24         int nmatches, regmatch_t *matches );
  25
  26 static slap_control_t acl_mask(
  27         AccessControl *ac, slap_mask_t *mask,
  28         Backend *be, Connection *conn, Operation *op,
  29         Entry *e,
  30         AttributeDescription *desc,
  31         struct berval *val,
  32         regmatch_t *matches );
  33
  34 #ifdef SLAPD_ACI_ENABLED
  35 static int aci_mask(
  36         Backend *be,
  37     Connection *conn,
  38         Operation *op,
  39         Entry *e,
  40         AttributeDescription *desc,
  41         struct berval *val,
  42         struct berval *aci,
  43         regmatch_t *matches,
  44         slap_access_t *grant,
  45         slap_access_t *deny );
  46 #endif
  47
  48 static int      regex_matches(
  49         char *pat, char *str, char *buf, regmatch_t *matches);
  50 static void     string_expand(
  51         char *newbuf, int bufsiz, char *pattern,
  52         char *match, regmatch_t *matches);
  53
  54 char **aci_set_gather (void *cookie, char *name, char *attr);
  55 static int aci_match_set ( struct berval *subj, Backend *be,
  56     Entry *e, Connection *conn, Operation *op, int setref );
  57
  58 /*
  59  * access_allowed - check whether op->o_ndn is allowed the requested access
  60  * to entry e, attribute attr, value val.  if val is null, access to
  61  * the whole attribute is assumed (all values).
  62  *
  63  * This routine loops through all access controls and calls
  64  * acl_mask() on each applicable access control.
  65  * The loop exits when a definitive answer is reached or
  66  * or no more controls remain.
  67  *
  68  * returns:
  69  *              0       access denied
  70  *              1       access granted
  71  */
  72
  73 int
  74 access_allowed(
  75     Backend             *be,
  76     Connection          *conn,
  77     Operation           *op,
  78     Entry               *e,
  79         AttributeDescription    *desc,
  80     struct berval       *val,
  81     slap_access_t       access )
  82 {
  83         int                             count;
  84         AccessControl   *a;
  85 #ifdef LDAP_DEBUG
  86         char accessmaskbuf[ACCESSMASK_MAXLEN];
  87 #endif
  88         slap_mask_t mask;
  89         slap_control_t control;
  90         const char *attr;
  91         regmatch_t matches[MAXREMATCHES];
  92
  93         assert( e != NULL );
  94         assert( desc != NULL );
  95         assert( access > ACL_NONE );
  96
  97         attr = desc->ad_cname.bv_val;
  98
  99         assert( attr != NULL );
 100
 101 #ifdef NEW_LOGGING
 102         LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
 103                 "access_allowed: conn %d %s access to \"%s\" \"%s\" requested\n",
 104                 conn ? conn->c_connid : -1, access2str( access ), e->e_dn, attr ));
 105 #else
 106         Debug( LDAP_DEBUG_ACL,
 107                 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
 108             access2str( access ), e->e_dn, attr );
 109 #endif
 110
 111         if ( op == NULL ) {
 112                 /* no-op call */
 113                 return 1;
 114         }
 115
 116         if ( be == NULL ) be = &backends[0];
 117         assert( be != NULL );
 118
 119         /* grant database root access */
 120         if ( be != NULL && be_isroot( be, op->o_ndn.bv_val ) ) {
 121 #ifdef NEW_LOGGING
 122                 LDAP_LOG(( "acl", LDAP_LEVEL_INFO,
 123                        "access_allowed: conn %d root access granted\n",
 124                        conn->c_connid));
 125 #else
 126                 Debug( LDAP_DEBUG_ACL,
 127                     "<= root access granted\n",
 128                         0, 0, 0 );
 129 #endif
 130                 return 1;
 131         }
 132
 133         /*
 134          * no-user-modification operational attributes are ignored
 135          * by ACL_WRITE checking as any found here are not provided
 136          * by the user
 137          */
 138         if ( access >= ACL_WRITE && is_at_no_user_mod( desc->ad_type )
 139                 && desc != slap_schema.si_ad_entry
 140                 && desc != slap_schema.si_ad_children )
 141         {
 142 #ifdef NEW_LOGGING
 143                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 144                        "access_allowed: conn %d NoUserMod Operational attribute: %s access granted\n",
 145                        conn->c_connid, attr ));
 146 #else
 147                 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
 148                         " %s access granted\n",
 149                         attr, 0, 0 );
 150 #endif
 151                 return 1;
 152         }
 153
 154         /* use backend default access if no backend acls */
 155         if( be != NULL && be->be_acl == NULL ) {
 156 #ifdef NEW_LOGGING
 157                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 158                        "access_allowed: conn %d backend default %s access %s to \"%s\"\n",
 159                        conn->c_connid, access2str( access ),
 160                        be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn ));
 161 #else
 162                 Debug( LDAP_DEBUG_ACL,
 163                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
 164                         access2str( access ),
 165                         be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn );
 166 #endif
 167                 return be->be_dfltaccess >= access;
 168
 169 #ifdef notdef
 170         /* be is always non-NULL */
 171         /* use global default access if no global acls */
 172         } else if ( be == NULL && global_acl == NULL ) {
 173 #ifdef NEW_LOGGING
 174                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 175                        "access_allowed: conn %d global default %s access %s to \"%s\"\n",
 176                        conn->c_connid, access2str( access ),
 177                        global_default_access >= access ? "granted" : "denied", op->o_dn ));
 178 #else
 179                 Debug( LDAP_DEBUG_ACL,
 180                         "=> access_allowed: global default %s access %s to \"%s\"\n",
 181                         access2str( access ),
 182                         global_default_access >= access ? "granted" : "denied", op->o_dn );
 183 #endif
 184                 return global_default_access >= access;
 185 #endif
 186         }
 187
 188         ACL_INIT(mask);
 189         memset(matches, '\0', sizeof(matches));
 190
 191         control = ACL_BREAK;
 192         a = NULL;
 193         count = 0;
 194
 195         while((a = acl_get( a, &count, be, op, e, desc, MAXREMATCHES, matches )) != NULL)
 196         {
 197                 int i;
 198
 199                 for (i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++) {
 200 #ifdef NEW_LOGGING
 201                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 202                                "access_allowed: conn %d match[%d]:  %d %d ",
 203                                conn->c_connid, i, (int)matches[i].rm_so, (int)matches[i].rm_eo ));
 204 #else
 205                         Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
 206                                (int)matches[i].rm_so, (int)matches[i].rm_eo );
 207 #endif
 208                         if( matches[i].rm_so <= matches[0].rm_eo ) {
 209                                 int n;
 210                                 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++) {
 211                                         Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
 212                                 }
 213                         }
 214 #ifdef NEW_LOGGING
 215                         LDAP_LOG(( "acl", LDAP_LEVEL_ARGS, "\n" ));
 216 #else
 217                         Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
 218 #endif
 219                 }
 220
 221                 control = acl_mask( a, &mask, be, conn, op,
 222                         e, desc, val, matches );
 223
 224                 if ( control != ACL_BREAK ) {
 225                         break;
 226                 }
 227
 228                 memset(matches, '\0', sizeof(matches));
 229         }
 230
 231         if ( ACL_IS_INVALID( mask ) ) {
 232 #ifdef NEW_LOGGING
 233                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 234                        "access_allowed: conn %d  \"%s\" (%s) invalid!\n",
 235                        conn->c_connid, e->e_dn, attr ));
 236 #else
 237                 Debug( LDAP_DEBUG_ACL,
 238                         "=> access_allowed: \"%s\" (%s) invalid!\n",
 239                         e->e_dn, attr, 0 );
 240 #endif
 241                 ACL_INIT( mask );
 242
 243         } else if ( control == ACL_BREAK ) {
 244 #ifdef NEW_LOGGING
 245                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 246                        "access_allowed: conn %d  no more rules\n", conn->c_connid ));
 247 #else
 248                 Debug( LDAP_DEBUG_ACL,
 249                         "=> access_allowed: no more rules\n", 0, 0, 0);
 250 #endif
 251                 ACL_INIT( mask );
 252         }
 253
 254 #ifdef NEW_LOGGING
 255         LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
 256                    "access_allowed: conn %d  %s access %s by %s\n",
 257                    conn->c_connid,
 258                    access2str( access ),
 259                    ACL_GRANT( mask, access ) ? "granted" : "denied",
 260                    accessmask2str( mask, accessmaskbuf ) ));
 261 #else
 262         Debug( LDAP_DEBUG_ACL,
 263                 "=> access_allowed: %s access %s by %s\n",
 264                 access2str( access ),
 265                 ACL_GRANT(mask, access) ? "granted" : "denied",
 266                 accessmask2str( mask, accessmaskbuf ) );
 267 #endif
 268         return ACL_GRANT(mask, access);
 269 }
 270
 271 /*
 272  * acl_get - return the acl applicable to entry e, attribute
 273  * attr.  the acl returned is suitable for use in subsequent calls to
 274  * acl_access_allowed().
 275  */
 276
 277 static AccessControl *
 278 acl_get(
 279         AccessControl *a,
 280         int                     *count,
 281     Backend             *be,
 282     Operation   *op,
 283     Entry               *e,
 284         AttributeDescription *desc,
 285     int                 nmatch,
 286     regmatch_t  *matches )
 287 {
 288         const char *attr;
 289         int dnlen, patlen;
 290
 291         assert( e != NULL );
 292         assert( count != NULL );
 293         assert( desc != NULL );
 294
 295         attr = desc->ad_cname.bv_val;
 296
 297         assert( attr != NULL );
 298
 299         if( a == NULL ) {
 300                 if( be == NULL ) {
 301                         a = global_acl;
 302                 } else {
 303                         a = be->be_acl;
 304                 }
 305
 306                 assert( a != NULL );
 307
 308         } else {
 309                 a = a->acl_next;
 310         }
 311
 312         dnlen = e->e_nname.bv_len;
 313
 314         for ( ; a != NULL; a = a->acl_next ) {
 315                 (*count) ++;
 316
 317                 if (a->acl_dn_pat.bv_len != 0) {
 318                         if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
 319 #ifdef NEW_LOGGING
 320                                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 321                                            "acl_get: dnpat [%d] %s nsub: %d\n",
 322                                            *count, a->acl_dn_pat, (int) a->acl_dn_re.re_nsub ));
 323 #else
 324                                 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
 325                                         *count, a->acl_dn_pat, (int) a->acl_dn_re.re_nsub );
 326 #endif
 327                                 if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
 328                                         continue;
 329
 330                         } else {
 331 #ifdef NEW_LOGGING
 332                                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 333                                            "acl_get: dn [%d] %s\n",
 334                                            *count, a->acl_dn_pat ));
 335 #else
 336                                 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
 337                                         *count, a->acl_dn_pat, 0 );
 338 #endif
 339                                 patlen = a->acl_dn_pat.bv_len;
 340                                 if ( dnlen < patlen )
 341                                         continue;
 342
 343                                 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
 344                                         /* base dn -- entire object DN must match */
 345                                         if ( dnlen != patlen )
 346                                                 continue;
 347
 348                                 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
 349                                         int rdnlen = -1;
 350
 351                                         if ( dnlen <= patlen )
 352                                                 continue;
 353
 354                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) || DN_ESCAPE( e->e_ndn[dnlen - patlen - 2] ) )
 355                                                 continue;
 356
 357                                         rdnlen = dn_rdnlen( NULL, e->e_ndn );
 358                                         if ( rdnlen != dnlen - patlen - 1 )
 359                                                 continue;
 360
 361                                 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
 362                                         if ( dnlen > patlen && ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) || DN_ESCAPE( e->e_ndn[dnlen - patlen - 2] ) ) )
 363                                                 continue;
 364
 365                                 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
 366                                         if ( dnlen <= patlen )
 367                                                 continue;
 368                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) || DN_ESCAPE( e->e_ndn[dnlen - patlen - 2] ) )
 369                                                 continue;
 370                                 }
 371
 372                                 if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
 373                                         continue;
 374                         }
 375
 376 #ifdef NEW_LOGGING
 377                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 378                                    "acl_get: [%d] matched\n",
 379                                    *count ));
 380 #else
 381                         Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
 382                                 *count, 0, 0 );
 383 #endif
 384                 }
 385
 386                 if ( a->acl_filter != NULL ) {
 387                         ber_int_t rc = test_filter( NULL, NULL, NULL, e, a->acl_filter );
 388                         if ( rc != LDAP_COMPARE_TRUE ) {
 389                                 continue;
 390                         }
 391                 }
 392
 393 #ifdef NEW_LOGGING
 394                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 395                            "acl_get: [%d] check attr %s\n",
 396                            *count, attr ));
 397 #else
 398                 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] check attr %s\n",
 399                        *count, attr, 0);
 400 #endif
 401                 if ( attr == NULL || a->acl_attrs == NULL ||
 402                         ad_inlist( desc, a->acl_attrs ) )
 403                 {
 404 #ifdef NEW_LOGGING
 405                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 406                                    "acl_get:  [%d] acl %s attr: %s\n",
 407                                    *count, e->e_dn, attr ));
 408 #else
 409                         Debug( LDAP_DEBUG_ACL,
 410                                 "<= acl_get: [%d] acl %s attr: %s\n",
 411                                 *count, e->e_dn, attr );
 412 #endif
 413                         return a;
 414                 }
 415                 matches[0].rm_so = matches[0].rm_eo = -1;
 416         }
 417
 418 #ifdef NEW_LOGGING
 419         LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
 420                    "acl_get: done.\n" ));
 421 #else
 422         Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
 423 #endif
 424         return( NULL );
 425 }
 426
 427
 428 /*
 429  * acl_mask - modifies mask based upon the given acl and the
 430  * requested access to entry e, attribute attr, value val.  if val
 431  * is null, access to the whole attribute is assumed (all values).
 432  *
 433  * returns      0       access NOT allowed
 434  *              1       access allowed
 435  */
 436
 437 static slap_control_t
 438 acl_mask(
 439     AccessControl       *a,
 440         slap_mask_t *mask,
 441     Backend             *be,
 442     Connection  *conn,
 443     Operation   *op,
 444     Entry               *e,
 445         AttributeDescription *desc,
 446     struct berval       *val,
 447         regmatch_t      *matches
 448 )
 449 {
 450         int             i, odnlen, patlen;
 451         Access  *b;
 452 #ifdef LDAP_DEBUG
 453         char accessmaskbuf[ACCESSMASK_MAXLEN];
 454 #endif
 455         const char *attr;
 456
 457         assert( a != NULL );
 458         assert( mask != NULL );
 459         assert( desc != NULL );
 460
 461         attr = desc->ad_cname.bv_val;
 462
 463         assert( attr != NULL );
 464
 465 #ifdef NEW_LOGGING
 466         LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
 467                    "acl_mask: conn %d  access to entry \"%s\", attr \"%s\" requested\n",
 468                    conn->c_connid, e->e_dn, attr ));
 469
 470         LDAP_LOG(( "acl", LDAP_LEVEL_ARGS,
 471                    " to %s by \"%s\", (%s) \n",
 472                    val ? "value" : "all values",
 473                    op->o_ndn ? op->o_ndn : "",
 474                    accessmask2str( *mask, accessmaskbuf ) ));
 475 #else
 476         Debug( LDAP_DEBUG_ACL,
 477                 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
 478                 e->e_dn, attr, 0 );
 479
 480         Debug( LDAP_DEBUG_ACL,
 481                 "=> acl_mask: to %s by \"%s\", (%s) \n",
 482                 val ? "value" : "all values",
 483                 op->o_ndn.bv_val ?  op->o_ndn.bv_val : "",
 484                 accessmask2str( *mask, accessmaskbuf ) );
 485 #endif
 486
 487         for ( i = 1, b = a->acl_access; b != NULL; b = b->a_next, i++ ) {
 488                 slap_mask_t oldmask, modmask;
 489
 490                 ACL_INVALIDATE( modmask );
 491
 492                 /* AND <who> clauses */
 493                 if ( b->a_dn_pat.bv_len != 0 ) {
 494 #ifdef NEW_LOGGING
 495                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 496                                    "acl_mask: conn %d  check a_dn_pat: %s\n",
 497                                    conn->c_connid, b->a_dn_pat.bv_val ));
 498 #else
 499                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
 500                                 b->a_dn_pat.bv_val, 0, 0);
 501 #endif
 502                         /*
 503                          * if access applies to the entry itself, and the
 504                          * user is bound as somebody in the same namespace as
 505                          * the entry, OR the given dn matches the dn pattern
 506                          */
 507                         if ( b->a_dn_pat.bv_len == sizeof("anonymous") -1 &&
 508                             strcmp( b->a_dn_pat.bv_val, "anonymous" ) == 0 ) {
 509                                 if (op->o_ndn.bv_len != 0 ) {
 510                                         continue;
 511                                 }
 512
 513                         } else if ( b->a_dn_pat.bv_len == sizeof("users") - 1 &&
 514                             strcmp( b->a_dn_pat.bv_val, "users" ) == 0 ) {
 515                                 if (op->o_ndn.bv_len == 0 ) {
 516                                         continue;
 517                                 }
 518
 519                         } else if ( b->a_dn_pat.bv_len == sizeof("self") - 1 &&
 520                             strcmp( b->a_dn_pat.bv_val, "self" ) == 0 ) {
 521                                 if( op->o_ndn.bv_len == 0 ) {
 522                                         continue;
 523                                 }
 524
 525                                 if ( e->e_dn == NULL || strcmp( e->e_ndn, op->o_ndn.bv_val ) != 0 ) {
 526                                         continue;
 527                                 }
 528
 529                         } else if ( b->a_dn_style == ACL_STYLE_REGEX ) {
 530                                 if ( b->a_dn_pat.bv_len != 1 ||
 531                                     strcmp( b->a_dn_pat.bv_val, "*" ) != 0 ) {
 532                                         int ret = regex_matches( b->a_dn_pat.bv_val,
 533                                                 op->o_ndn.bv_val, e->e_ndn, matches );
 534
 535                                         if( ret == 0 ) {
 536                                                 continue;
 537                                         }
 538                                 }
 539
 540                         } else {
 541                                 if ( e->e_dn == NULL )
 542                                         continue;
 543
 544                                 patlen = b->a_dn_pat.bv_len;
 545                                 odnlen = op->o_ndn.bv_len;
 546                                 if ( odnlen < patlen )
 547                                         continue;
 548
 549                                 if ( b->a_dn_style == ACL_STYLE_BASE ) {
 550                                         /* base dn -- entire object DN must match */
 551                                         if ( odnlen != patlen )
 552                                                 continue;
 553
 554                                 } else if ( b->a_dn_style == ACL_STYLE_ONE ) {
 555                                         int rdnlen = -1;
 556
 557                                         if ( odnlen <= patlen )
 558                                                 continue;
 559
 560                                         if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn.bv_val[odnlen - patlen - 2] ) )
 561                                                 continue;
 562
 563                                         rdnlen = dn_rdnlen( NULL, op->o_ndn.bv_val );
 564                                         if ( rdnlen != odnlen - patlen - 1 )
 565                                                 continue;
 566
 567                                 } else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) {
 568                                         if ( odnlen > patlen && ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn.bv_val[odnlen - patlen - 2] ) ) )
 569                                                 continue;
 570
 571                                 } else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) {
 572                                         if ( odnlen <= patlen )
 573                                                 continue;
 574                                         if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn.bv_val[odnlen - patlen - 2] ) )
 575                                                 continue;
 576                                 }
 577
 578                                 if ( strcmp( b->a_dn_pat.bv_val, op->o_ndn.bv_val + odnlen - patlen ) != 0 )
 579                                         continue;
 580
 581                         }
 582                 }
 583
 584                 if ( b->a_sockurl_pat != NULL ) {
 585 #ifdef NEW_LOGGING
 586                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 587                                    "acl_mask: conn %d  check a_sockurl_pat: %s\n",
 588                                    conn->c_connid, b->a_sockurl_pat ));
 589 #else
 590                         Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
 591                                 b->a_sockurl_pat, 0, 0 );
 592 #endif
 593
 594                         if ( strcmp( b->a_sockurl_pat, "*" ) != 0) {
 595                                 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
 596                                         if (!regex_matches( b->a_sockurl_pat, conn->c_listener_url,
 597                                                         e->e_ndn, matches ) )
 598                                         {
 599                                                 continue;
 600                                         }
 601                                 } else {
 602                                         if ( strcasecmp( b->a_sockurl_pat, conn->c_listener_url ) == 0 )
 603                                                 continue;
 604                                 }
 605                         }
 606                 }
 607
 608                 if ( b->a_domain_pat != NULL ) {
 609 #ifdef NEW_LOGGING
 610                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 611                                    "acl_mask: conn %d  check a_domain_pat: %s\n",
 612                                    conn->c_connid, b->a_domain_pat ));
 613 #else
 614                         Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
 615                                 b->a_domain_pat, 0, 0 );
 616 #endif
 617                         if ( strcmp( b->a_domain_pat, "*" ) != 0) {
 618                                 if ( b->a_domain_style == ACL_STYLE_REGEX) {
 619                                         if (!regex_matches( b->a_domain_pat, conn->c_peer_domain,
 620                                                         e->e_ndn, matches ) )
 621                                         {
 622                                                 continue;
 623                                         }
 624                                 } else {
 625                                         if ( strcasecmp( b->a_domain_pat, conn->c_peer_domain ) == 0 )
 626                                                 continue;
 627                                 }
 628                         }
 629                 }
 630
 631                 if ( b->a_peername_pat != NULL ) {
 632 #ifdef NEW_LOGGING
 633                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 634                                    "acl_mask: conn %d  check a_perrname_path: %s\n",
 635                                    conn->c_connid, b->a_peername_pat ));
 636 #else
 637                         Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
 638                                 b->a_peername_pat, 0, 0 );
 639 #endif
 640                         if ( strcmp( b->a_peername_pat, "*" ) != 0) {
 641                                 if ( b->a_peername_style == ACL_STYLE_REGEX) {
 642                                         if (!regex_matches( b->a_peername_pat, conn->c_peer_name,
 643                                                         e->e_ndn, matches ) )
 644                                         {
 645                                                 continue;
 646                                         }
 647                                 } else {
 648                                         if ( strcasecmp( b->a_peername_pat, conn->c_peer_name ) == 0 )
 649                                                 continue;
 650                                 }
 651                         }
 652                 }
 653
 654                 if ( b->a_sockname_pat != NULL ) {
 655 #ifdef NEW_LOGGING
 656                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 657                                    "acl_mask: conn %d  check a_sockname_path: %s\n",
 658                                    conn->c_connid, b->a_sockname_pat ));
 659 #else
 660                         Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
 661                                 b->a_sockname_pat, 0, 0 );
 662 #endif
 663                         if ( strcmp( b->a_sockname_pat, "*" ) != 0) {
 664                                 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
 665                                         if (!regex_matches( b->a_sockname_pat, conn->c_sock_name,
 666                                                         e->e_ndn, matches ) )
 667                                         {
 668                                                 continue;
 669                                         }
 670                                 } else {
 671                                         if ( strcasecmp( b->a_sockname_pat, conn->c_sock_name ) == 0 )
 672                                                 continue;
 673                                 }
 674                         }
 675                 }
 676
 677                 if ( b->a_dn_at != NULL && op->o_ndn.bv_len != 0 ) {
 678                         Attribute       *at;
 679                         struct berval   bv;
 680                         int rc, match = 0;
 681                         const char *text;
 682                         const char *attr = b->a_dn_at->ad_cname.bv_val;
 683
 684                         assert( attr != NULL );
 685
 686 #ifdef NEW_LOGGING
 687                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 688                                    "acl_mask: conn %d  check a_dn_pat: %s\n",
 689                                    conn->c_connid, attr ));
 690 #else
 691                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
 692                                 attr, 0, 0);
 693 #endif
 694                         bv = op->o_ndn;
 695
 696                         /* see if asker is listed in dnattr */
 697                         for( at = attrs_find( e->e_attrs, b->a_dn_at );
 698                                 at != NULL;
 699                                 at = attrs_find( at->a_next, b->a_dn_at ) )
 700                         {
 701                                 if( value_find( b->a_dn_at, at->a_vals, &bv ) == 0 ) {
 702                                         /* found it */
 703                                         match = 1;
 704                                         break;
 705                                 }
 706                         }
 707
 708                         if( match ) {
 709                                 /* have a dnattr match. if this is a self clause then
 710                                  * the target must also match the op dn.
 711                                  */
 712                                 if ( b->a_dn_self ) {
 713                                         /* check if the target is an attribute. */
 714                                         if ( val == NULL )
 715                                                 continue;
 716                                         /* target is attribute, check if the attribute value
 717                                          * is the op dn.
 718                                          */
 719                                         rc = value_match( &match, b->a_dn_at,
 720                                                 b->a_dn_at->ad_type->sat_equality, 0,
 721                                                 val, &bv, &text );
 722                                         /* on match error or no match, fail the ACL clause */
 723                                         if (rc != LDAP_SUCCESS || match != 0 )
 724                                                 continue;
 725                                 }
 726                         } else {
 727                                 /* no dnattr match, check if this is a self clause */
 728                                 if ( ! b->a_dn_self )
 729                                         continue;
 730                                 /* this is a self clause, check if the target is an
 731                                  * attribute.
 732                                  */
 733                                 if ( val == NULL )
 734                                         continue;
 735                                 /* target is attribute, check if the attribute value
 736                                  * is the op dn.
 737                                  */
 738                                 rc = value_match( &match, b->a_dn_at,
 739                                         b->a_dn_at->ad_type->sat_equality, 0,
 740                                         val, &bv, &text );
 741
 742                                 /* on match error or no match, fail the ACL clause */
 743                                 if (rc != LDAP_SUCCESS || match != 0 )
 744                                         continue;
 745                         }
 746                 }
 747
 748                 if ( b->a_group_pat != NULL && op->o_ndn.bv_len != 0 ) {
 749                         char buf[1024];
 750
 751                         /* b->a_group is an unexpanded entry name, expanded it should be an
 752                          * entry with objectclass group* and we test to see if odn is one of
 753                          * the values in the attribute group
 754                          */
 755                         /* see if asker is listed in dnattr */
 756                         if ( b->a_group_style == ACL_STYLE_REGEX ) {
 757                                 string_expand(buf, sizeof(buf), b->a_group_pat, e->e_ndn, matches);
 758                                 if ( dn_normalize(buf) == NULL ) {
 759                                         /* did not expand to a valid dn */
 760                                         continue;
 761                                 }
 762                         } else {
 763                                 strncpy( buf, b->a_group_pat, sizeof(buf) - 1 );
 764                                 buf[sizeof(buf) - 1] = 0;
 765                         }
 766
 767                         if (backend_group(be, conn, op, e, buf, op->o_ndn.bv_val,
 768                                 b->a_group_oc, b->a_group_at) != 0)
 769                         {
 770                                 continue;
 771                         }
 772                 }
 773
 774                 if ( b->a_set_pat.bv_len != 0 ) {
 775                         if (aci_match_set( &b->a_set_pat, be, e, conn, op, 0 ) == 0) {
 776                                 continue;
 777                         }
 778                 }
 779
 780                 if ( b->a_authz.sai_ssf ) {
 781 #ifdef NEW_LOGGING
 782                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 783                                    "acl_mask: conn %d  check a_authz.sai_ssf: ACL %u > OP %u\n",
 784                                    conn->c_connid, b->a_authz.sai_ssf, op->o_ssf ));
 785 #else
 786                         Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
 787                                 b->a_authz.sai_ssf, op->o_ssf, 0 );
 788 #endif
 789                         if ( b->a_authz.sai_ssf >  op->o_ssf ) {
 790                                 continue;
 791                         }
 792                 }
 793
 794                 if ( b->a_authz.sai_transport_ssf ) {
 795 #ifdef NEW_LOGGING
 796                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 797                                    "acl_mask: conn %d  check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
 798                                    conn->c_connid, b->a_authz.sai_transport_ssf, op->o_transport_ssf ));
 799 #else
 800                         Debug( LDAP_DEBUG_ACL,
 801                                 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
 802                                 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
 803 #endif
 804                         if ( b->a_authz.sai_transport_ssf >  op->o_transport_ssf ) {
 805                                 continue;
 806                         }
 807                 }
 808
 809                 if ( b->a_authz.sai_tls_ssf ) {
 810 #ifdef NEW_LOGGING
 811                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 812                                    "acl_mask: conn %d  check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
 813                                    conn->c_connid, b->a_authz.sai_tls_ssf, op->o_tls_ssf ));
 814 #else
 815                         Debug( LDAP_DEBUG_ACL,
 816                                 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
 817                                 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
 818 #endif
 819                         if ( b->a_authz.sai_tls_ssf >  op->o_tls_ssf ) {
 820                                 continue;
 821                         }
 822                 }
 823
 824                 if ( b->a_authz.sai_sasl_ssf ) {
 825 #ifdef NEW_LOGGING
 826                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 827                                    "acl_mask: conn %d check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
 828                                    conn->c_connid, b->a_authz.sai_sasl_ssf, op->o_sasl_ssf ));
 829 #else
 830                         Debug( LDAP_DEBUG_ACL,
 831                                 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
 832                                 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
 833 #endif
 834                         if ( b->a_authz.sai_sasl_ssf >  op->o_sasl_ssf ) {
 835                                 continue;
 836                         }
 837                 }
 838
 839 #ifdef SLAPD_ACI_ENABLED
 840                 if ( b->a_aci_at != NULL ) {
 841                         Attribute       *at;
 842                         slap_access_t grant, deny, tgrant, tdeny;
 843
 844                         /* this case works different from the others above.
 845                          * since aci's themselves give permissions, we need
 846                          * to first check b->a_access_mask, the ACL's access level.
 847                          */
 848
 849                         if( op->o_ndn.bv_len == 0 ) {
 850                                 continue;
 851                         }
 852
 853                         if ( e->e_dn == NULL ) {
 854                                 continue;
 855                         }
 856
 857                         /* first check if the right being requested
 858                          * is allowed by the ACL clause.
 859                          */
 860                         if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
 861                                 continue;
 862                         }
 863
 864                         /* get the aci attribute */
 865                         at = attr_find( e->e_attrs, b->a_aci_at );
 866                         if ( at == NULL ) {
 867                                 continue;
 868                         }
 869
 870                         /* start out with nothing granted, nothing denied */
 871                         ACL_INIT(tgrant);
 872                         ACL_INIT(tdeny);
 873
 874                         /* the aci is an multi-valued attribute.  The
 875                          * rights are determined by OR'ing the individual
 876                          * rights given by the acis.
 877                          */
 878                         for ( i = 0; at->a_vals[i] != NULL; i++ ) {
 879                                 if (aci_mask( be, conn, op,
 880                                         e, desc, val, at->a_vals[i],
 881                                         matches, &grant, &deny ) != 0)
 882                                 {
 883                                         tgrant |= grant;
 884                                         tdeny |= deny;
 885                                 }
 886                         }
 887
 888                         /* remove anything that the ACL clause does not allow */
 889                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
 890                         tdeny &= ACL_PRIV_MASK;
 891
 892                         /* see if we have anything to contribute */
 893                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
 894                                 continue;
 895                         }
 896
 897                         /* this could be improved by changing acl_mask so that it can deal with
 898                          * by clauses that return grant/deny pairs.  Right now, it does either
 899                          * additive or subtractive rights, but not both at the same time.  So,
 900                          * we need to combine the grant/deny pair into a single rights mask in
 901                          * a smart way:  if either grant or deny is "empty", then we use the
 902                          * opposite as is, otherwise we remove any denied rights from the grant
 903                          * rights mask and construct an additive mask.
 904                          */
 905                         if (ACL_IS_INVALID(tdeny)) {
 906                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
 907
 908                         } else if (ACL_IS_INVALID(tgrant)) {
 909                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
 910
 911                         } else {
 912                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
 913                         }
 914
 915                 } else
 916 #endif
 917                 {
 918                         modmask = b->a_access_mask;
 919                 }
 920
 921 #ifdef NEW_LOGGING
 922                 LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
 923                            "acl_mask: conn %d  [%d] applying %s (%s)\n",
 924                            conn->c_connid, i, accessmask2str( modmask, accessmaskbuf),
 925                            b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK
 926                            ? "break" : "stop" ));
 927 #else
 928                 Debug( LDAP_DEBUG_ACL,
 929                         "<= acl_mask: [%d] applying %s (%s)\n",
 930                         i, accessmask2str( modmask, accessmaskbuf ),
 931                         b->a_type == ACL_CONTINUE
 932                                 ? "continue"
 933                                 : b->a_type == ACL_BREAK
 934                                         ? "break"
 935                                         : "stop" );
 936 #endif
 937                 /* save old mask */
 938                 oldmask = *mask;
 939
 940                 if( ACL_IS_ADDITIVE(modmask) ) {
 941                         /* add privs */
 942                         ACL_PRIV_SET( *mask, modmask );
 943
 944                         /* cleanup */
 945                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
 946
 947                 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
 948                         /* substract privs */
 949                         ACL_PRIV_CLR( *mask, modmask );
 950
 951                         /* cleanup */
 952                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
 953
 954                 } else {
 955                         /* assign privs */
 956                         *mask = modmask;
 957                 }
 958
 959 #ifdef NEW_LOGGING
 960                 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
 961                            "acl_mask: conn %d  [%d] mask: %s\n",
 962                            conn->c_connid, i, accessmask2str( *mask, accessmaskbuf) ));
 963 #else
 964                 Debug( LDAP_DEBUG_ACL,
 965                         "<= acl_mask: [%d] mask: %s\n",
 966                         i, accessmask2str(*mask, accessmaskbuf), 0 );
 967 #endif
 968
 969                 if( b->a_type == ACL_CONTINUE ) {
 970                         continue;
 971
 972                 } else if ( b->a_type == ACL_BREAK ) {
 973                         return ACL_BREAK;
 974
 975                 } else {
 976                         return ACL_STOP;
 977                 }
 978         }
 979
 980         /* implicit "by * none" clause */
 981         ACL_INIT(*mask);
 982
 983 #ifdef NEW_LOGGING
 984         LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
 985                    "acl_mask: conn %d  no more <who> clauses, returning %d (stop)\n",
 986                    conn->c_connid, accessmask2str( *mask, accessmaskbuf) ));
 987 #else
 988         Debug( LDAP_DEBUG_ACL,
 989                 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
 990                 accessmask2str(*mask, accessmaskbuf), 0, 0 );
 991 #endif
 992         return ACL_STOP;
 993 }
 994
 995 /*
 996  * acl_check_modlist - check access control on the given entry to see if
 997  * it allows the given modifications by the user associated with op.
 998  * returns      1       if mods allowed ok
 999  *                      0       mods not allowed
1000  */
1001
1002 int
1003 acl_check_modlist(
1004     Backend     *be,
1005     Connection  *conn,
1006     Operation   *op,
1007     Entry       *e,
1008     Modifications       *mlist
1009 )
1010 {
1011         int             i;
1012
1013         assert( be != NULL );
1014
1015         /* short circuit root database access */
1016         if ( be_isroot( be, op->o_ndn.bv_val ) ) {
1017 #ifdef NEW_LOGGING
1018                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
1019                            "acl_check_modlist: conn %d  access granted to root user\n",
1020                            conn->c_connid ));
1021 #else
1022                 Debug( LDAP_DEBUG_ACL,
1023                         "<= acl_access_allowed: granted to database root\n",
1024                     0, 0, 0 );
1025 #endif
1026                 return 1;
1027         }
1028
1029         /* use backend default access if no backend acls */
1030         if( be != NULL && be->be_acl == NULL ) {
1031 #ifdef NEW_LOGGING
1032                 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1033                            "acl_check_modlist: conn %d  backend default %s access %s to \"%s\"\n",
1034                            conn->c_connid, access2str( ACL_WRITE ),
1035                            be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
1036 #else
1037                 Debug( LDAP_DEBUG_ACL,
1038                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
1039                         access2str( ACL_WRITE ),
1040                         be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1041 #endif
1042                 return be->be_dfltaccess >= ACL_WRITE;
1043
1044 #ifdef notdef
1045         /* be is always non-NULL */
1046         /* use global default access if no global acls */
1047         } else if ( be == NULL && global_acl == NULL ) {
1048 #ifdef NEW_LOGGING
1049                 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1050                            "acl_check_modlist: conn %d  global default %s access %s to \"%s\"\n",
1051                            conn->c_connid, access2str( ACL_WRITE ),
1052                            global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
1053 #else
1054                 Debug( LDAP_DEBUG_ACL,
1055                         "=> access_allowed: global default %s access %s to \"%s\"\n",
1056                         access2str( ACL_WRITE ),
1057                         global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1058 #endif
1059                 return global_default_access >= ACL_WRITE;
1060 #endif
1061         }
1062
1063         for ( ; mlist != NULL; mlist = mlist->sml_next ) {
1064                 /*
1065                  * no-user-modification operational attributes are ignored
1066                  * by ACL_WRITE checking as any found here are not provided
1067                  * by the user
1068                  */
1069                 if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) {
1070 #ifdef NEW_LOGGING
1071                         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1072                                    "acl_check_modlist: conn %d  no-user-mod %s: modify access granted\n",
1073                                    conn->c_connid, mlist->sml_desc->ad_cname.bv_val ));
1074 #else
1075                         Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
1076                                 " modify access granted\n",
1077                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1078 #endif
1079                         continue;
1080                 }
1081
1082                 switch ( mlist->sml_op ) {
1083                 case LDAP_MOD_REPLACE:
1084                 case LDAP_MOD_ADD:
1085                         if ( mlist->sml_bvalues == NULL ) {
1086                                 break;
1087                         }
1088                         for ( i = 0; mlist->sml_bvalues[i] != NULL; i++ ) {
1089                                 if ( ! access_allowed( be, conn, op, e,
1090                                         mlist->sml_desc, mlist->sml_bvalues[i], ACL_WRITE ) )
1091                                 {
1092                                         return( 0 );
1093                                 }
1094                         }
1095                         break;
1096
1097                 case LDAP_MOD_DELETE:
1098                         if ( mlist->sml_bvalues == NULL ) {
1099                                 if ( ! access_allowed( be, conn, op, e,
1100                                         mlist->sml_desc, NULL, ACL_WRITE ) )
1101                                 {
1102                                         return( 0 );
1103                                 }
1104                                 break;
1105                         }
1106                         for ( i = 0; mlist->sml_bvalues[i] != NULL; i++ ) {
1107                                 if ( ! access_allowed( be, conn, op, e,
1108                                         mlist->sml_desc, mlist->sml_bvalues[i], ACL_WRITE ) )
1109                                 {
1110                                         return( 0 );
1111                                 }
1112                         }
1113                         break;
1114                 }
1115         }
1116
1117         return( 1 );
1118 }
1119
1120 static char *
1121 aci_bvstrdup( struct berval *bv )
1122 {
1123         char *s;
1124
1125         s = (char *)ch_malloc(bv->bv_len + 1);
1126         if (s != NULL) {
1127                 AC_MEMCPY(s, bv->bv_val, bv->bv_len);
1128                 s[bv->bv_len] = 0;
1129         }
1130         return(s);
1131 }
1132
1133 #ifdef SLAPD_ACI_ENABLED
1134 static int
1135 aci_strbvcmp(
1136         const char *s,
1137         struct berval *bv )
1138 {
1139         int res, len;
1140
1141         res = strncasecmp( s, bv->bv_val, bv->bv_len );
1142         if (res)
1143                 return(res);
1144         len = strlen(s);
1145         if (len > (int)bv->bv_len)
1146                 return(1);
1147         if (len < (int)bv->bv_len)
1148                 return(-1);
1149         return(0);
1150 }
1151 #endif
1152
1153 static int
1154 aci_get_part(
1155         struct berval *list,
1156         int ix,
1157         char sep,
1158         struct berval *bv )
1159 {
1160         int len;
1161         char *p;
1162
1163         if (bv) {
1164                 bv->bv_len = 0;
1165                 bv->bv_val = NULL;
1166         }
1167         len = list->bv_len;
1168         p = list->bv_val;
1169         while (len >= 0 && --ix >= 0) {
1170                 while (--len >= 0 && *p++ != sep) ;
1171         }
1172         while (len >= 0 && *p == ' ') {
1173                 len--;
1174                 p++;
1175         }
1176         if (len < 0)
1177                 return(-1);
1178
1179         if (!bv)
1180                 return(0);
1181
1182         bv->bv_val = p;
1183         while (--len >= 0 && *p != sep) {
1184                 bv->bv_len++;
1185                 p++;
1186         }
1187         while (bv->bv_len > 0 && *--p == ' ')
1188                 bv->bv_len--;
1189         return(bv->bv_len);
1190 }
1191
1192 char **
1193 aci_set_gather (void *cookie, char *name, char *attr)
1194 {
1195         struct {
1196         Backend *be;
1197         Entry *e;
1198         Connection *conn;
1199         Operation *op;
1200         } *cp = (void *)cookie;
1201         struct berval **bvals = NULL;
1202         char **vals = NULL;
1203         char *ndn;
1204         int i;
1205
1206         /* this routine needs to return the bervals instead of
1207          * plain strings, since syntax is not known.  It should
1208          * also return the syntax or some "comparison cookie".
1209          */
1210
1211         if ((ndn = ch_strdup(name)) != NULL) {
1212                 if (dn_normalize(ndn) != NULL) {
1213                         const char *text;
1214                         AttributeDescription *desc = NULL;
1215                         if (slap_str2ad(attr, &desc, &text) == LDAP_SUCCESS) {
1216                                 backend_attribute(cp->be, NULL /*cp->conn*/,
1217                                                                         NULL /*cp->op*/, cp->e,
1218                                                                         ndn, desc, &bvals);
1219                                 if (bvals != NULL) {
1220                                         for (i = 0; bvals[i] != NULL; i++) { }
1221                                         vals = ch_calloc(i + 1, sizeof(char *));
1222                                         if (vals != NULL) {
1223                                                 while (--i >= 0) {
1224                                                         vals[i] = bvals[i]->bv_val;
1225                                                         bvals[i]->bv_val = NULL;
1226                                                 }
1227                                         }
1228                                         ber_bvecfree(bvals);
1229                                 }
1230                         }
1231                 }
1232                 ch_free(ndn);
1233         }
1234         return(vals);
1235 }
1236
1237 static int
1238 aci_match_set (
1239         struct berval *subj,
1240     Backend *be,
1241     Entry *e,
1242     Connection *conn,
1243     Operation *op,
1244     int setref
1245 )
1246 {
1247         char *set = NULL;
1248         int rc = 0;
1249         struct {
1250         Backend *be;
1251         Entry *e;
1252         Connection *conn;
1253         Operation *op;
1254         } cookie;
1255
1256         if (setref == 0) {
1257                 set = aci_bvstrdup(subj);
1258         } else {
1259                 struct berval bv;
1260                 char *subjdn;
1261                 char *setat;
1262                 struct berval **bvals;
1263                 const char *text;
1264                 AttributeDescription *desc = NULL;
1265
1266                 /* format of string is "entry/setAttrName" */
1267                 if (aci_get_part(subj, 0, '/', &bv) < 0) {
1268                         return(0);
1269                 }
1270
1271                 subjdn = aci_bvstrdup(&bv);
1272                 if ( subjdn == NULL ) {
1273                         return(0);
1274                 }
1275
1276                 if ( aci_get_part(subj, 1, '/', &bv) < 0 ) {
1277                         setat = ch_strdup( SLAPD_ACI_SET_ATTR );
1278                 } else {
1279                         setat = aci_bvstrdup(&bv);
1280                 }
1281                 if ( setat != NULL ) {
1282                         if ( dn_normalize(subjdn) != NULL
1283                                 && slap_str2ad(setat, &desc, &text) == LDAP_SUCCESS )
1284                         {
1285                                 backend_attribute(be, NULL, NULL, e,
1286                                                                 subjdn, desc, &bvals);
1287                                 if ( bvals != NULL ) {
1288                                         if ( bvals[0] != NULL )
1289                                                 set = ch_strdup(bvals[0]->bv_val);
1290                                         ber_bvecfree(bvals);
1291                                 }
1292                         }
1293                         ch_free(setat);
1294                 }
1295                 ch_free(subjdn);
1296         }
1297
1298         if (set != NULL) {
1299                 cookie.be = be;
1300                 cookie.e = e;
1301                 cookie.conn = conn;
1302                 cookie.op = op;
1303                 rc = (set_filter(aci_set_gather, &cookie, set, op->o_ndn.bv_val, e->e_ndn, NULL) > 0);
1304                 ch_free(set);
1305         }
1306         return(rc);
1307 }
1308
1309 #ifdef SLAPD_ACI_ENABLED
1310 static int
1311 aci_list_map_rights(
1312         struct berval *list )
1313 {
1314         struct berval bv;
1315         slap_access_t mask;
1316         int i;
1317
1318         ACL_INIT(mask);
1319         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1320                 if (bv.bv_len <= 0)
1321                         continue;
1322                 switch (*bv.bv_val) {
1323                 case 'c':
1324                         ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
1325                         break;
1326                 case 's':
1327                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines
1328                          * the right 's' to mean "set", but in the examples states
1329                          * that the right 's' means "search".  The latter definition
1330                          * is used here.
1331                          */
1332                         ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
1333                         break;
1334                 case 'r':
1335                         ACL_PRIV_SET(mask, ACL_PRIV_READ);
1336                         break;
1337                 case 'w':
1338                         ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
1339                         break;
1340                 case 'x':
1341                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not
1342                          * define any equivalent to the AUTH right, so I've just used
1343                          * 'x' for now.
1344                          */
1345                         ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
1346                         break;
1347                 default:
1348                         break;
1349                 }
1350
1351         }
1352         return(mask);
1353 }
1354
1355 static int
1356 aci_list_has_attr(
1357         struct berval *list,
1358         const char *attr,
1359         struct berval *val )
1360 {
1361         struct berval bv, left, right;
1362         int i;
1363
1364         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1365                 if (aci_get_part(&bv, 0, '=', &left) < 0
1366                         || aci_get_part(&bv, 1, '=', &right) < 0)
1367                 {
1368                         if (aci_strbvcmp(attr, &bv) == 0)
1369                                 return(1);
1370                 } else if (val == NULL) {
1371                         if (aci_strbvcmp(attr, &left) == 0)
1372                                 return(1);
1373                 } else {
1374                         if (aci_strbvcmp(attr, &left) == 0) {
1375                                 /* this is experimental code that implements a
1376                                  * simple (prefix) match of the attribute value.
1377                                  * the ACI draft does not provide for aci's that
1378                                  * apply to specific values, but it would be
1379                                  * nice to have.  If the <attr> part of an aci's
1380                                  * rights list is of the form <attr>=<value>,
1381                                  * that means the aci applies only to attrs with
1382                                  * the given value.  Furthermore, if the attr is
1383                                  * of the form <attr>=<value>*, then <value> is
1384                                  * treated as a prefix, and the aci applies to
1385                                  * any value with that prefix.
1386                                  *
1387                                  * Ideally, this would allow r.e. matches.
1388                                  */
1389                                 if (aci_get_part(&right, 0, '*', &left) < 0
1390                                         || right.bv_len <= left.bv_len)
1391                                 {
1392                                         if (aci_strbvcmp(val->bv_val, &right) == 0)
1393                                                 return(1);
1394                                 } else if (val->bv_len >= left.bv_len) {
1395                                         if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0)
1396                                                 return(1);
1397                                 }
1398                         }
1399                 }
1400         }
1401         return(0);
1402 }
1403
1404 static slap_access_t
1405 aci_list_get_attr_rights(
1406         struct berval *list,
1407         const char *attr,
1408         struct berval *val )
1409 {
1410     struct berval bv;
1411     slap_access_t mask;
1412     int i;
1413
1414         /* loop through each rights/attr pair, skip first part (action) */
1415         ACL_INIT(mask);
1416         for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
1417                 if (aci_list_has_attr(&bv, attr, val) == 0)
1418                         continue;
1419                 if (aci_get_part(list, i, ';', &bv) < 0)
1420                         continue;
1421                 mask |= aci_list_map_rights(&bv);
1422         }
1423         return(mask);
1424 }
1425
1426 static int
1427 aci_list_get_rights(
1428         struct berval *list,
1429         const char *attr,
1430         struct berval *val,
1431         slap_access_t *grant,
1432         slap_access_t *deny )
1433 {
1434     struct berval perm, actn;
1435     slap_access_t *mask;
1436     int i, found;
1437
1438         if (attr == NULL || *attr == 0 || strcasecmp(attr, "entry") == 0) {
1439                 attr = "[entry]";
1440         }
1441
1442         found = 0;
1443         ACL_INIT(*grant);
1444         ACL_INIT(*deny);
1445         /* loop through each permissions clause */
1446         for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) {
1447                 if (aci_get_part(&perm, 0, ';', &actn) < 0)
1448                         continue;
1449                 if (aci_strbvcmp( "grant", &actn ) == 0) {
1450                         mask = grant;
1451                 } else if (aci_strbvcmp( "deny", &actn ) == 0) {
1452                         mask = deny;
1453                 } else {
1454                         continue;
1455                 }
1456
1457                 found = 1;
1458                 *mask |= aci_list_get_attr_rights(&perm, attr, val);
1459                 *mask |= aci_list_get_attr_rights(&perm, "[all]", NULL);
1460         }
1461         return(found);
1462 }
1463
1464 static int
1465 aci_group_member (
1466         struct berval *subj,
1467         const char *defgrpoc,
1468         const char *defgrpat,
1469     Backend             *be,
1470     Entry               *e,
1471     Connection          *conn,
1472     Operation           *op,
1473         regmatch_t      *matches
1474 )
1475 {
1476         struct berval bv;
1477         char *subjdn, *grpdn = NULL;
1478         char *grpoc;
1479         char *grpat;
1480         ObjectClass *grp_oc = NULL;
1481         AttributeDescription *grp_ad = NULL;
1482         const char *text;
1483         int rc;
1484
1485         /* format of string is "group/objectClassValue/groupAttrName" */
1486         if (aci_get_part(subj, 0, '/', &bv) < 0) {
1487                 return(0);
1488         }
1489
1490         subjdn = aci_bvstrdup(&bv);
1491         if (subjdn == NULL) {
1492                 return(0);
1493         }
1494
1495         if (aci_get_part(subj, 1, '/', &bv) < 0) {
1496                 grpoc = ch_strdup( defgrpoc );
1497         } else {
1498                 grpoc = aci_bvstrdup(&bv);
1499         }
1500
1501         if (aci_get_part(subj, 2, '/', &bv) < 0) {
1502                 grpat = ch_strdup( defgrpat );
1503         } else {
1504                 grpat = aci_bvstrdup(&bv);
1505         }
1506
1507         rc = slap_str2ad( grpat, &grp_ad, &text );
1508         if( rc != LDAP_SUCCESS ) {
1509                 rc = 0;
1510                 goto done;
1511         }
1512         rc = 0;
1513
1514         grp_oc = oc_find( grpoc );
1515         grpdn = (char *)ch_malloc(1024);
1516
1517         if (grp_oc != NULL && grp_ad != NULL && grpdn != NULL) {
1518                 string_expand(grpdn, 1024, subjdn, e->e_ndn, matches);
1519                 if ( dn_normalize(grpdn) != NULL ) {
1520                         rc = (backend_group(be, conn, op, e, grpdn, op->o_ndn.bv_val, grp_oc, grp_ad) == 0);
1521                 }
1522         }
1523
1524 done:
1525         ch_free(grpdn);
1526         ch_free(grpat);
1527         ch_free(grpoc);
1528         ch_free(subjdn);
1529         return(rc);
1530 }
1531
1532 static int
1533 aci_mask(
1534     Backend                     *be,
1535     Connection          *conn,
1536     Operation           *op,
1537     Entry                       *e,
1538         AttributeDescription *desc,
1539     struct berval       *val,
1540     struct berval       *aci,
1541         regmatch_t              *matches,
1542         slap_access_t   *grant,
1543         slap_access_t   *deny
1544 )
1545 {
1546     struct berval bv, perms, sdn;
1547     char *subjdn;
1548         int rc;
1549         char *attr = desc->ad_cname.bv_val;
1550
1551         assert( attr != NULL );
1552
1553         /* parse an aci of the form:
1554                 oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN
1555
1556            See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
1557            a full description of the format for this attribute.
1558
1559            For now, this routine only supports scope=entry.
1560          */
1561
1562         /* check that the aci has all 5 components */
1563         if (aci_get_part(aci, 4, '#', NULL) < 0)
1564                 return(0);
1565
1566         /* check that the aci family is supported */
1567         if (aci_get_part(aci, 0, '#', &bv) < 0)
1568                 return(0);
1569
1570         /* check that the scope is "entry" */
1571         if (aci_get_part(aci, 1, '#', &bv) < 0
1572                 || aci_strbvcmp( "entry", &bv ) != 0)
1573         {
1574                 return(0);
1575         }
1576
1577         /* get the list of permissions clauses, bail if empty */
1578         if (aci_get_part(aci, 2, '#', &perms) <= 0)
1579                 return(0);
1580
1581         /* check if any permissions allow desired access */
1582         if (aci_list_get_rights(&perms, attr, val, grant, deny) == 0)
1583                 return(0);
1584
1585         /* see if we have a DN match */
1586         if (aci_get_part(aci, 3, '#', &bv) < 0)
1587                 return(0);
1588
1589         if (aci_get_part(aci, 4, '#', &sdn) < 0)
1590                 return(0);
1591
1592         if (aci_strbvcmp( "access-id", &bv ) == 0) {
1593                 subjdn = aci_bvstrdup(&sdn);
1594                 if (subjdn == NULL)
1595                         return(0);
1596                 rc = 1;
1597                 if ( dn_normalize(subjdn) != NULL )
1598                         if (strcasecmp(op->o_ndn.bv_val, subjdn) != 0)
1599                                 rc = 0;
1600                 ch_free(subjdn);
1601                 return(rc);
1602         }
1603
1604         if (aci_strbvcmp( "self", &bv ) == 0) {
1605                 if (strcmp(op->o_ndn.bv_val, e->e_ndn) == 0)
1606                         return(1);
1607
1608         } else if (aci_strbvcmp( "dnattr", &bv ) == 0) {
1609                 char *dnattr = aci_bvstrdup(&sdn);
1610                 Attribute *at;
1611                 AttributeDescription *ad = NULL;
1612                 const char *text;
1613
1614                 rc = slap_str2ad( dnattr, &ad, &text );
1615                 ch_free( dnattr );
1616
1617                 if( rc != LDAP_SUCCESS ) {
1618                         return 0;
1619                 }
1620
1621                 rc = 0;
1622
1623                 bv = op->o_ndn;
1624
1625                 for(at = attrs_find( e->e_attrs, ad );
1626                         at != NULL;
1627                         at = attrs_find( at->a_next, ad ) )
1628                 {
1629                         if (value_find( ad, at->a_vals, &bv) == 0 ) {
1630                                 rc = 1;
1631                                 break;
1632                         }
1633                 }
1634
1635                 return rc;
1636
1637
1638         } else if (aci_strbvcmp( "group", &bv ) == 0) {
1639                 if (aci_group_member(&sdn, SLAPD_GROUP_CLASS, SLAPD_GROUP_ATTR, be, e, conn, op, matches))
1640                         return(1);
1641
1642         } else if (aci_strbvcmp( "role", &bv ) == 0) {
1643                 if (aci_group_member(&sdn, SLAPD_ROLE_CLASS, SLAPD_ROLE_ATTR, be, e, conn, op, matches))
1644                         return(1);
1645
1646         } else if (aci_strbvcmp( "set", &bv ) == 0) {
1647                 if (aci_match_set(&sdn, be, e, conn, op, 0))
1648                         return(1);
1649
1650         } else if (aci_strbvcmp( "set-ref", &bv ) == 0) {
1651                 if (aci_match_set(&sdn, be, e, conn, op, 1))
1652                         return(1);
1653
1654         }
1655
1656         return(0);
1657 }
1658
1659 #endif  /* SLAPD_ACI_ENABLED */
1660
1661 static void
1662 string_expand(
1663         char *newbuf,
1664         int bufsiz,
1665         char *pat,
1666         char *match,
1667         regmatch_t *matches)
1668 {
1669         int     size;
1670         char   *sp;
1671         char   *dp;
1672         int     flag;
1673
1674         size = 0;
1675         newbuf[0] = '\0';
1676         bufsiz--; /* leave space for lone $ */
1677
1678         flag = 0;
1679         for ( dp = newbuf, sp = pat; size < bufsiz && *sp ; sp++) {
1680                 /* did we previously see a $ */
1681                 if (flag) {
1682                         if (*sp == '$') {
1683                                 *dp++ = '$';
1684                                 size++;
1685                         } else if (*sp >= '0' && *sp <= '9' ) {
1686                                 int     n;
1687                                 int     i;
1688                                 int     l;
1689
1690                                 n = *sp - '0';
1691                                 *dp = '\0';
1692                                 i = matches[n].rm_so;
1693                                 l = matches[n].rm_eo;
1694                                 for ( ; size < 512 && i < l; size++, i++ ) {
1695                                         *dp++ = match[i];
1696                                         size++;
1697                                 }
1698                                 *dp = '\0';
1699                         }
1700                         flag = 0;
1701                 } else {
1702                         if (*sp == '$') {
1703                                 flag = 1;
1704                         } else {
1705                                 *dp++ = *sp;
1706                                 size++;
1707                         }
1708                 }
1709         }
1710
1711         if (flag) {
1712                 /* must have ended with a single $ */
1713                 *dp++ = '$';
1714                 size++;
1715         }
1716
1717         *dp = '\0';
1718
1719 #ifdef NEW_LOGGING
1720         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1721                    "string_expand:  pattern = %s\n", pat ));
1722         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1723                    "string_expand:  expanded = %s\n", newbuf ));
1724 #else
1725         Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern:  %s\n", pat, 0, 0 );
1726         Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", newbuf, 0, 0 );
1727 #endif
1728 }
1729
1730 static int
1731 regex_matches(
1732         char *pat,                              /* pattern to expand and match against */
1733         char *str,                              /* string to match against pattern */
1734         char *buf,                              /* buffer with $N expansion variables */
1735         regmatch_t *matches             /* offsets in buffer for $N expansion variables */
1736 )
1737 {
1738         regex_t re;
1739         char newbuf[512];
1740         int     rc;
1741
1742         if(str == NULL) str = "";
1743
1744         string_expand(newbuf, sizeof(newbuf), pat, buf, matches);
1745         if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) {
1746                 char error[512];
1747                 regerror(rc, &re, error, sizeof(error));
1748
1749 #ifdef NEW_LOGGING
1750                 LDAP_LOG(( "aci", LDAP_LEVEL_ERR,
1751                            "regex_matches: compile( \"%s\", \"%s\") failed %s\n",
1752                            pat, str, error ));
1753 #else
1754                 Debug( LDAP_DEBUG_TRACE,
1755                     "compile( \"%s\", \"%s\") failed %s\n",
1756                         pat, str, error );
1757 #endif
1758                 return( 0 );
1759         }
1760
1761         rc = regexec(&re, str, 0, NULL, 0);
1762         regfree( &re );
1763
1764 #ifdef NEW_LOGGING
1765         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1766                    "regex_matches: string:   %s\n", str ));
1767         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1768                    "regex_matches: rc:  %d  %s\n",
1769                    rc, rc ? "matches" : "no matches" ));
1770 #else
1771         Debug( LDAP_DEBUG_TRACE,
1772             "=> regex_matches: string:   %s\n", str, 0, 0 );
1773         Debug( LDAP_DEBUG_TRACE,
1774             "=> regex_matches: rc: %d %s\n",
1775                 rc, !rc ? "matches" : "no matches", 0 );
1776 #endif
1777         return( !rc );
1778 }
1779