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 ) ) {
 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 = strlen(e->e_ndn);
 313
 314         for ( ; a != NULL; a = a->acl_next ) {
 315                 (*count) ++;
 316
 317                 if (a->acl_dn_pat != NULL) {
 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 = strlen( a->acl_dn_pat );
 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, 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 ?  op->o_ndn : "",
 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 != NULL ) {
 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 ));
 498 #else
 499                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
 500                                 b->a_dn_pat, 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 ( strcmp( b->a_dn_pat, "anonymous" ) == 0 ) {
 508                                 if (op->o_ndn != NULL && op->o_ndn[0] != '\0' ) {
 509                                         continue;
 510                                 }
 511
 512                         } else if ( strcmp( b->a_dn_pat, "users" ) == 0 ) {
 513                                 if (op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
 514                                         continue;
 515                                 }
 516
 517                         } else if ( strcmp( b->a_dn_pat, "self" ) == 0 ) {
 518                                 if( op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
 519                                         continue;
 520                                 }
 521
 522                                 if ( e->e_dn == NULL || strcmp( e->e_ndn, op->o_ndn ) != 0 ) {
 523                                         continue;
 524                                 }
 525
 526                         } else if ( b->a_dn_style == ACL_STYLE_REGEX ) {
 527                                 if ( strcmp( b->a_dn_pat, "*" ) != 0 ) {
 528                                         int ret = regex_matches( b->a_dn_pat,
 529                                                 op->o_ndn, e->e_ndn, matches );
 530
 531                                         if( ret == 0 ) {
 532                                                 continue;
 533                                         }
 534                                 }
 535
 536                         } else {
 537                                 if ( e->e_dn == NULL )
 538                                         continue;
 539
 540                                 patlen = strlen( b->a_dn_pat );
 541                                 odnlen = strlen( op->o_ndn );
 542                                 if ( odnlen < patlen )
 543                                         continue;
 544
 545                                 if ( b->a_dn_style == ACL_STYLE_BASE ) {
 546                                         /* base dn -- entire object DN must match */
 547                                         if ( odnlen != patlen )
 548                                                 continue;
 549
 550                                 } else if ( b->a_dn_style == ACL_STYLE_ONE ) {
 551                                         int rdnlen = -1;
 552
 553                                         if ( odnlen <= patlen )
 554                                                 continue;
 555
 556                                         if ( !DN_SEPARATOR( op->o_ndn[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn[odnlen - patlen - 2] ) )
 557                                                 continue;
 558
 559                                         rdnlen = dn_rdnlen( NULL, op->o_ndn );
 560                                         if ( rdnlen != odnlen - patlen - 1 )
 561                                                 continue;
 562
 563                                 } else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) {
 564                                         if ( odnlen > patlen && ( !DN_SEPARATOR( op->o_ndn[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn[odnlen - patlen - 2] ) ) )
 565                                                 continue;
 566
 567                                 } else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) {
 568                                         if ( odnlen <= patlen )
 569                                                 continue;
 570                                         if ( !DN_SEPARATOR( op->o_ndn[odnlen - patlen - 1] ) || DN_ESCAPE( op->o_ndn[odnlen - patlen - 2] ) )
 571                                                 continue;
 572                                 }
 573
 574                                 if ( strcmp( b->a_dn_pat, op->o_ndn + odnlen - patlen ) != 0 )
 575                                         continue;
 576
 577                         }
 578                 }
 579
 580                 if ( b->a_sockurl_pat != NULL ) {
 581 #ifdef NEW_LOGGING
 582                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 583                                    "acl_mask: conn %d  check a_sockurl_pat: %s\n",
 584                                    conn->c_connid, b->a_sockurl_pat ));
 585 #else
 586                         Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
 587                                 b->a_sockurl_pat, 0, 0 );
 588 #endif
 589
 590                         if ( strcmp( b->a_sockurl_pat, "*" ) != 0) {
 591                                 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
 592                                         if (!regex_matches( b->a_sockurl_pat, conn->c_listener_url,
 593                                                         e->e_ndn, matches ) )
 594                                         {
 595                                                 continue;
 596                                         }
 597                                 } else {
 598                                         if ( strcasecmp( b->a_sockurl_pat, conn->c_listener_url ) == 0 )
 599                                                 continue;
 600                                 }
 601                         }
 602                 }
 603
 604                 if ( b->a_domain_pat != NULL ) {
 605 #ifdef NEW_LOGGING
 606                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 607                                    "acl_mask: conn %d  check a_domain_pat: %s\n",
 608                                    conn->c_connid, b->a_domain_pat ));
 609 #else
 610                         Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
 611                                 b->a_domain_pat, 0, 0 );
 612 #endif
 613                         if ( strcmp( b->a_domain_pat, "*" ) != 0) {
 614                                 if ( b->a_domain_style == ACL_STYLE_REGEX) {
 615                                         if (!regex_matches( b->a_domain_pat, conn->c_peer_domain,
 616                                                         e->e_ndn, matches ) )
 617                                         {
 618                                                 continue;
 619                                         }
 620                                 } else {
 621                                         if ( strcasecmp( b->a_domain_pat, conn->c_peer_domain ) == 0 )
 622                                                 continue;
 623                                 }
 624                         }
 625                 }
 626
 627                 if ( b->a_peername_pat != NULL ) {
 628 #ifdef NEW_LOGGING
 629                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 630                                    "acl_mask: conn %d  check a_perrname_path: %s\n",
 631                                    conn->c_connid, b->a_peername_pat ));
 632 #else
 633                         Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
 634                                 b->a_peername_pat, 0, 0 );
 635 #endif
 636                         if ( strcmp( b->a_peername_pat, "*" ) != 0) {
 637                                 if ( b->a_peername_style == ACL_STYLE_REGEX) {
 638                                         if (!regex_matches( b->a_peername_pat, conn->c_peer_name,
 639                                                         e->e_ndn, matches ) )
 640                                         {
 641                                                 continue;
 642                                         }
 643                                 } else {
 644                                         if ( strcasecmp( b->a_peername_pat, conn->c_peer_name ) == 0 )
 645                                                 continue;
 646                                 }
 647                         }
 648                 }
 649
 650                 if ( b->a_sockname_pat != NULL ) {
 651 #ifdef NEW_LOGGING
 652                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 653                                    "acl_mask: conn %d  check a_sockname_path: %s\n",
 654                                    conn->c_connid, b->a_sockname_pat ));
 655 #else
 656                         Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
 657                                 b->a_sockname_pat, 0, 0 );
 658 #endif
 659                         if ( strcmp( b->a_sockname_pat, "*" ) != 0) {
 660                                 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
 661                                         if (!regex_matches( b->a_sockname_pat, conn->c_sock_name,
 662                                                         e->e_ndn, matches ) )
 663                                         {
 664                                                 continue;
 665                                         }
 666                                 } else {
 667                                         if ( strcasecmp( b->a_sockname_pat, conn->c_sock_name ) == 0 )
 668                                                 continue;
 669                                 }
 670                         }
 671                 }
 672
 673                 if ( b->a_dn_at != NULL && op->o_ndn != NULL ) {
 674                         Attribute       *at;
 675                         struct berval   bv;
 676                         int rc, match = 0;
 677                         const char *text;
 678                         const char *attr = b->a_dn_at->ad_cname.bv_val;
 679
 680                         assert( attr != NULL );
 681
 682 #ifdef NEW_LOGGING
 683                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 684                                    "acl_mask: conn %d  check a_dn_pat: %s\n",
 685                                    conn->c_connid, attr ));
 686 #else
 687                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
 688                                 attr, 0, 0);
 689 #endif
 690                         bv.bv_val = op->o_ndn;
 691                         bv.bv_len = strlen( bv.bv_val );
 692
 693                         /* see if asker is listed in dnattr */
 694                         for( at = attrs_find( e->e_attrs, b->a_dn_at );
 695                                 at != NULL;
 696                                 at = attrs_find( at->a_next, b->a_dn_at ) )
 697                         {
 698                                 if( value_find( b->a_dn_at, at->a_vals, &bv ) == 0 ) {
 699                                         /* found it */
 700                                         match = 1;
 701                                         break;
 702                                 }
 703                         }
 704
 705                         if( match ) {
 706                                 /* have a dnattr match. if this is a self clause then
 707                                  * the target must also match the op dn.
 708                                  */
 709                                 if ( b->a_dn_self ) {
 710                                         /* check if the target is an attribute. */
 711                                         if ( val == NULL )
 712                                                 continue;
 713                                         /* target is attribute, check if the attribute value
 714                                          * is the op dn.
 715                                          */
 716                                         rc = value_match( &match, b->a_dn_at,
 717                                                 b->a_dn_at->ad_type->sat_equality, 0,
 718                                                 val, &bv, &text );
 719                                         /* on match error or no match, fail the ACL clause */
 720                                         if (rc != LDAP_SUCCESS || match != 0 )
 721                                                 continue;
 722                                 }
 723                         } else {
 724                                 /* no dnattr match, check if this is a self clause */
 725                                 if ( ! b->a_dn_self )
 726                                         continue;
 727                                 /* this is a self clause, check if the target is an
 728                                  * attribute.
 729                                  */
 730                                 if ( val == NULL )
 731                                         continue;
 732                                 /* target is attribute, check if the attribute value
 733                                  * is the op dn.
 734                                  */
 735                                 rc = value_match( &match, b->a_dn_at,
 736                                         b->a_dn_at->ad_type->sat_equality, 0,
 737                                         val, &bv, &text );
 738
 739                                 /* on match error or no match, fail the ACL clause */
 740                                 if (rc != LDAP_SUCCESS || match != 0 )
 741                                         continue;
 742                         }
 743                 }
 744
 745                 if ( b->a_group_pat != NULL && op->o_ndn != NULL ) {
 746                         char buf[1024];
 747
 748                         /* b->a_group is an unexpanded entry name, expanded it should be an
 749                          * entry with objectclass group* and we test to see if odn is one of
 750                          * the values in the attribute group
 751                          */
 752                         /* see if asker is listed in dnattr */
 753                         if ( b->a_group_style == ACL_STYLE_REGEX ) {
 754                                 string_expand(buf, sizeof(buf), b->a_group_pat, e->e_ndn, matches);
 755                                 if ( dn_normalize(buf) == NULL ) {
 756                                         /* did not expand to a valid dn */
 757                                         continue;
 758                                 }
 759                         } else {
 760                                 strncpy( buf, b->a_group_pat, sizeof(buf) - 1 );
 761                                 buf[sizeof(buf) - 1] = 0;
 762                         }
 763
 764                         if (backend_group(be, conn, op, e, buf, op->o_ndn,
 765                                 b->a_group_oc, b->a_group_at) != 0)
 766                         {
 767                                 continue;
 768                         }
 769                 }
 770
 771                 if ( b->a_set_pat != NULL ) {
 772                         struct berval bv;
 773
 774                         bv.bv_val = b->a_set_pat;
 775                         bv.bv_len = strlen(b->a_set_pat);
 776                         if (aci_match_set( &bv, be, e, conn, op, 0 ) == 0) {
 777                                 continue;
 778                         }
 779                 }
 780
 781                 if ( b->a_authz.sai_ssf ) {
 782 #ifdef NEW_LOGGING
 783                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 784                                    "acl_mask: conn %d  check a_authz.sai_ssf: ACL %u > OP %u\n",
 785                                    conn->c_connid, b->a_authz.sai_ssf, op->o_ssf ));
 786 #else
 787                         Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
 788                                 b->a_authz.sai_ssf, op->o_ssf, 0 );
 789 #endif
 790                         if ( b->a_authz.sai_ssf >  op->o_ssf ) {
 791                                 continue;
 792                         }
 793                 }
 794
 795                 if ( b->a_authz.sai_transport_ssf ) {
 796 #ifdef NEW_LOGGING
 797                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 798                                    "acl_mask: conn %d  check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
 799                                    conn->c_connid, b->a_authz.sai_transport_ssf, op->o_transport_ssf ));
 800 #else
 801                         Debug( LDAP_DEBUG_ACL,
 802                                 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
 803                                 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
 804 #endif
 805                         if ( b->a_authz.sai_transport_ssf >  op->o_transport_ssf ) {
 806                                 continue;
 807                         }
 808                 }
 809
 810                 if ( b->a_authz.sai_tls_ssf ) {
 811 #ifdef NEW_LOGGING
 812                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 813                                    "acl_mask: conn %d  check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
 814                                    conn->c_connid, b->a_authz.sai_tls_ssf, op->o_tls_ssf ));
 815 #else
 816                         Debug( LDAP_DEBUG_ACL,
 817                                 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
 818                                 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
 819 #endif
 820                         if ( b->a_authz.sai_tls_ssf >  op->o_tls_ssf ) {
 821                                 continue;
 822                         }
 823                 }
 824
 825                 if ( b->a_authz.sai_sasl_ssf ) {
 826 #ifdef NEW_LOGGING
 827                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 828                                    "acl_mask: conn %d check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
 829                                    conn->c_connid, b->a_authz.sai_sasl_ssf, op->o_sasl_ssf ));
 830 #else
 831                         Debug( LDAP_DEBUG_ACL,
 832                                 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
 833                                 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
 834 #endif
 835                         if ( b->a_authz.sai_sasl_ssf >  op->o_sasl_ssf ) {
 836                                 continue;
 837                         }
 838                 }
 839
 840 #ifdef SLAPD_ACI_ENABLED
 841                 if ( b->a_aci_at != NULL ) {
 842                         Attribute       *at;
 843                         slap_access_t grant, deny, tgrant, tdeny;
 844
 845                         /* this case works different from the others above.
 846                          * since aci's themselves give permissions, we need
 847                          * to first check b->a_access_mask, the ACL's access level.
 848                          */
 849
 850                         if( op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
 851                                 continue;
 852                         }
 853
 854                         if ( e->e_dn == NULL ) {
 855                                 continue;
 856                         }
 857
 858                         /* first check if the right being requested
 859                          * is allowed by the ACL clause.
 860                          */
 861                         if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
 862                                 continue;
 863                         }
 864
 865                         /* get the aci attribute */
 866                         at = attr_find( e->e_attrs, b->a_aci_at );
 867                         if ( at == NULL ) {
 868                                 continue;
 869                         }
 870
 871                         /* start out with nothing granted, nothing denied */
 872                         ACL_INIT(tgrant);
 873                         ACL_INIT(tdeny);
 874
 875                         /* the aci is an multi-valued attribute.  The
 876                          * rights are determined by OR'ing the individual
 877                          * rights given by the acis.
 878                          */
 879                         for ( i = 0; at->a_vals[i] != NULL; i++ ) {
 880                                 if (aci_mask( be, conn, op,
 881                                         e, desc, val, at->a_vals[i],
 882                                         matches, &grant, &deny ) != 0)
 883                                 {
 884                                         tgrant |= grant;
 885                                         tdeny |= deny;
 886                                 }
 887                         }
 888
 889                         /* remove anything that the ACL clause does not allow */
 890                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
 891                         tdeny &= ACL_PRIV_MASK;
 892
 893                         /* see if we have anything to contribute */
 894                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
 895                                 continue;
 896                         }
 897
 898                         /* this could be improved by changing acl_mask so that it can deal with
 899                          * by clauses that return grant/deny pairs.  Right now, it does either
 900                          * additive or subtractive rights, but not both at the same time.  So,
 901                          * we need to combine the grant/deny pair into a single rights mask in
 902                          * a smart way:  if either grant or deny is "empty", then we use the
 903                          * opposite as is, otherwise we remove any denied rights from the grant
 904                          * rights mask and construct an additive mask.
 905                          */
 906                         if (ACL_IS_INVALID(tdeny)) {
 907                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
 908
 909                         } else if (ACL_IS_INVALID(tgrant)) {
 910                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
 911
 912                         } else {
 913                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
 914                         }
 915
 916                 } else
 917 #endif
 918                 {
 919                         modmask = b->a_access_mask;
 920                 }
 921
 922 #ifdef NEW_LOGGING
 923                 LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
 924                            "acl_mask: conn %d  [%d] applying %s (%s)\n",
 925                            conn->c_connid, i, accessmask2str( modmask, accessmaskbuf),
 926                            b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK
 927                            ? "break" : "stop" ));
 928 #else
 929                 Debug( LDAP_DEBUG_ACL,
 930                         "<= acl_mask: [%d] applying %s (%s)\n",
 931                         i, accessmask2str( modmask, accessmaskbuf ),
 932                         b->a_type == ACL_CONTINUE
 933                                 ? "continue"
 934                                 : b->a_type == ACL_BREAK
 935                                         ? "break"
 936                                         : "stop" );
 937 #endif
 938                 /* save old mask */
 939                 oldmask = *mask;
 940
 941                 if( ACL_IS_ADDITIVE(modmask) ) {
 942                         /* add privs */
 943                         ACL_PRIV_SET( *mask, modmask );
 944
 945                         /* cleanup */
 946                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
 947
 948                 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
 949                         /* substract privs */
 950                         ACL_PRIV_CLR( *mask, modmask );
 951
 952                         /* cleanup */
 953                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
 954
 955                 } else {
 956                         /* assign privs */
 957                         *mask = modmask;
 958                 }
 959
 960 #ifdef NEW_LOGGING
 961                 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
 962                            "acl_mask: conn %d  [%d] mask: %s\n",
 963                            conn->c_connid, i, accessmask2str( *mask, accessmaskbuf) ));
 964 #else
 965                 Debug( LDAP_DEBUG_ACL,
 966                         "<= acl_mask: [%d] mask: %s\n",
 967                         i, accessmask2str(*mask, accessmaskbuf), 0 );
 968 #endif
 969
 970                 if( b->a_type == ACL_CONTINUE ) {
 971                         continue;
 972
 973                 } else if ( b->a_type == ACL_BREAK ) {
 974                         return ACL_BREAK;
 975
 976                 } else {
 977                         return ACL_STOP;
 978                 }
 979         }
 980
 981         /* implicit "by * none" clause */
 982         ACL_INIT(*mask);
 983
 984 #ifdef NEW_LOGGING
 985         LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
 986                    "acl_mask: conn %d  no more <who> clauses, returning %d (stop)\n",
 987                    conn->c_connid, accessmask2str( *mask, accessmaskbuf) ));
 988 #else
 989         Debug( LDAP_DEBUG_ACL,
 990                 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
 991                 accessmask2str(*mask, accessmaskbuf), 0, 0 );
 992 #endif
 993         return ACL_STOP;
 994 }
 995
 996 /*
 997  * acl_check_modlist - check access control on the given entry to see if
 998  * it allows the given modifications by the user associated with op.
 999  * returns      1       if mods allowed ok
1000  *                      0       mods not allowed
1001  */
1002
1003 int
1004 acl_check_modlist(
1005     Backend     *be,
1006     Connection  *conn,
1007     Operation   *op,
1008     Entry       *e,
1009     Modifications       *mlist
1010 )
1011 {
1012         int             i;
1013
1014         assert( be != NULL );
1015
1016         /* short circuit root database access */
1017         if ( be_isroot( be, op->o_ndn ) ) {
1018 #ifdef NEW_LOGGING
1019                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
1020                            "acl_check_modlist: conn %d  access granted to root user\n",
1021                            conn->c_connid ));
1022 #else
1023                 Debug( LDAP_DEBUG_ACL,
1024                         "<= acl_access_allowed: granted to database root\n",
1025                     0, 0, 0 );
1026 #endif
1027                 return 1;
1028         }
1029
1030         /* use backend default access if no backend acls */
1031         if( be != NULL && be->be_acl == NULL ) {
1032 #ifdef NEW_LOGGING
1033                 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1034                            "acl_check_modlist: conn %d  backend default %s access %s to \"%s\"\n",
1035                            conn->c_connid, access2str( ACL_WRITE ),
1036                            be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
1037 #else
1038                 Debug( LDAP_DEBUG_ACL,
1039                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
1040                         access2str( ACL_WRITE ),
1041                         be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1042 #endif
1043                 return be->be_dfltaccess >= ACL_WRITE;
1044
1045 #ifdef notdef
1046         /* be is always non-NULL */
1047         /* use global default access if no global acls */
1048         } else if ( be == NULL && global_acl == NULL ) {
1049 #ifdef NEW_LOGGING
1050                 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1051                            "acl_check_modlist: conn %d  global default %s access %s to \"%s\"\n",
1052                            conn->c_connid, access2str( ACL_WRITE ),
1053                            global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
1054 #else
1055                 Debug( LDAP_DEBUG_ACL,
1056                         "=> access_allowed: global default %s access %s to \"%s\"\n",
1057                         access2str( ACL_WRITE ),
1058                         global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1059 #endif
1060                 return global_default_access >= ACL_WRITE;
1061 #endif
1062         }
1063
1064         for ( ; mlist != NULL; mlist = mlist->sml_next ) {
1065                 /*
1066                  * no-user-modification operational attributes are ignored
1067                  * by ACL_WRITE checking as any found here are not provided
1068                  * by the user
1069                  */
1070                 if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) {
1071 #ifdef NEW_LOGGING
1072                         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1073                                    "acl_check_modlist: conn %d  no-user-mod %s: modify access granted\n",
1074                                    conn->c_connid, mlist->sml_desc->ad_cname.bv_val ));
1075 #else
1076                         Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
1077                                 " modify access granted\n",
1078                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1079 #endif
1080                         continue;
1081                 }
1082
1083                 switch ( mlist->sml_op ) {
1084                 case LDAP_MOD_REPLACE:
1085                 case LDAP_MOD_ADD:
1086                         if ( mlist->sml_bvalues == NULL ) {
1087                                 break;
1088                         }
1089                         for ( i = 0; mlist->sml_bvalues[i] != NULL; i++ ) {
1090                                 if ( ! access_allowed( be, conn, op, e,
1091                                         mlist->sml_desc, mlist->sml_bvalues[i], ACL_WRITE ) )
1092                                 {
1093                                         return( 0 );
1094                                 }
1095                         }
1096                         break;
1097
1098                 case LDAP_MOD_DELETE:
1099                         if ( mlist->sml_bvalues == NULL ) {
1100                                 if ( ! access_allowed( be, conn, op, e,
1101                                         mlist->sml_desc, NULL, ACL_WRITE ) )
1102                                 {
1103                                         return( 0 );
1104                                 }
1105                                 break;
1106                         }
1107                         for ( i = 0; mlist->sml_bvalues[i] != NULL; i++ ) {
1108                                 if ( ! access_allowed( be, conn, op, e,
1109                                         mlist->sml_desc, mlist->sml_bvalues[i], ACL_WRITE ) )
1110                                 {
1111                                         return( 0 );
1112                                 }
1113                         }
1114                         break;
1115                 }
1116         }
1117
1118         return( 1 );
1119 }
1120
1121 static char *
1122 aci_bvstrdup( struct berval *bv )
1123 {
1124         char *s;
1125
1126         s = (char *)ch_malloc(bv->bv_len + 1);
1127         if (s != NULL) {
1128                 AC_MEMCPY(s, bv->bv_val, bv->bv_len);
1129                 s[bv->bv_len] = 0;
1130         }
1131         return(s);
1132 }
1133
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
1152 static int
1153 aci_get_part(
1154         struct berval *list,
1155         int ix,
1156         char sep,
1157         struct berval *bv )
1158 {
1159         int len;
1160         char *p;
1161
1162         if (bv) {
1163                 bv->bv_len = 0;
1164                 bv->bv_val = NULL;
1165         }
1166         len = list->bv_len;
1167         p = list->bv_val;
1168         while (len >= 0 && --ix >= 0) {
1169                 while (--len >= 0 && *p++ != sep) ;
1170         }
1171         while (len >= 0 && *p == ' ') {
1172                 len--;
1173                 p++;
1174         }
1175         if (len < 0)
1176                 return(-1);
1177
1178         if (!bv)
1179                 return(0);
1180
1181         bv->bv_val = p;
1182         while (--len >= 0 && *p != sep) {
1183                 bv->bv_len++;
1184                 p++;
1185         }
1186         while (bv->bv_len > 0 && *--p == ' ')
1187                 bv->bv_len--;
1188         return(bv->bv_len);
1189 }
1190
1191 char **
1192 aci_set_gather (void *cookie, char *name, char *attr)
1193 {
1194         struct {
1195         Backend *be;
1196         Entry *e;
1197         Connection *conn;
1198         Operation *op;
1199         } *cp = (void *)cookie;
1200         struct berval **bvals = NULL;
1201         char **vals = NULL;
1202         char *ndn;
1203         int i;
1204
1205         /* this routine needs to return the bervals instead of
1206          * plain strings, since syntax is not known.  It should
1207          * also return the syntax or some "comparison cookie".
1208          */
1209
1210         if ((ndn = ch_strdup(name)) != NULL) {
1211                 if (dn_normalize(ndn) != NULL) {
1212                         const char *text;
1213                         AttributeDescription *desc = NULL;
1214                         if (slap_str2ad(attr, &desc, &text) == LDAP_SUCCESS) {
1215                                 backend_attribute(cp->be, NULL /*cp->conn*/,
1216                                                                         NULL /*cp->op*/, cp->e,
1217                                                                         ndn, desc, &bvals);
1218                                 if (bvals != NULL) {
1219                                         for (i = 0; bvals[i] != NULL; i++) { }
1220                                         vals = ch_calloc(i + 1, sizeof(char *));
1221                                         if (vals != NULL) {
1222                                                 while (--i >= 0) {
1223                                                         vals[i] = bvals[i]->bv_val;
1224                                                         bvals[i]->bv_val = NULL;
1225                                                 }
1226                                         }
1227                                         ber_bvecfree(bvals);
1228                                 }
1229                         }
1230                 }
1231                 ch_free(ndn);
1232         }
1233         return(vals);
1234 }
1235
1236 static int
1237 aci_match_set (
1238         struct berval *subj,
1239     Backend *be,
1240     Entry *e,
1241     Connection *conn,
1242     Operation *op,
1243     int setref
1244 )
1245 {
1246         char *set = NULL;
1247         int rc = 0;
1248         struct {
1249         Backend *be;
1250         Entry *e;
1251         Connection *conn;
1252         Operation *op;
1253         } cookie;
1254
1255         if (setref == 0) {
1256                 set = aci_bvstrdup(subj);
1257         } else {
1258                 struct berval bv;
1259                 char *subjdn;
1260                 char *setat;
1261                 struct berval **bvals;
1262                 const char *text;
1263                 AttributeDescription *desc = NULL;
1264
1265                 /* format of string is "entry/setAttrName" */
1266                 if (aci_get_part(subj, 0, '/', &bv) < 0) {
1267                         return(0);
1268                 }
1269
1270                 subjdn = aci_bvstrdup(&bv);
1271                 if ( subjdn == NULL ) {
1272                         return(0);
1273                 }
1274
1275                 if ( aci_get_part(subj, 1, '/', &bv) < 0 ) {
1276                         setat = ch_strdup( SLAPD_ACI_SET_ATTR );
1277                 } else {
1278                         setat = aci_bvstrdup(&bv);
1279                 }
1280                 if ( setat != NULL ) {
1281                         if ( dn_normalize(subjdn) != NULL
1282                                 && slap_str2ad(setat, &desc, &text) == LDAP_SUCCESS )
1283                         {
1284                                 backend_attribute(be, NULL, NULL, e,
1285                                                                 subjdn, desc, &bvals);
1286                                 if ( bvals != NULL ) {
1287                                         if ( bvals[0] != NULL )
1288                                                 set = ch_strdup(bvals[0]->bv_val);
1289                                         ber_bvecfree(bvals);
1290                                 }
1291                         }
1292                         ch_free(setat);
1293                 }
1294                 ch_free(subjdn);
1295         }
1296
1297         if (set != NULL) {
1298                 cookie.be = be;
1299                 cookie.e = e;
1300                 cookie.conn = conn;
1301                 cookie.op = op;
1302                 rc = (set_filter(aci_set_gather, &cookie, set, op->o_ndn, e->e_ndn, NULL) > 0);
1303                 ch_free(set);
1304         }
1305         return(rc);
1306 }
1307
1308 #ifdef SLAPD_ACI_ENABLED
1309 static int
1310 aci_list_map_rights(
1311         struct berval *list )
1312 {
1313         struct berval bv;
1314         slap_access_t mask;
1315         int i;
1316
1317         ACL_INIT(mask);
1318         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1319                 if (bv.bv_len <= 0)
1320                         continue;
1321                 switch (*bv.bv_val) {
1322                 case 'c':
1323                         ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
1324                         break;
1325                 case 's':
1326                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines
1327                          * the right 's' to mean "set", but in the examples states
1328                          * that the right 's' means "search".  The latter definition
1329                          * is used here.
1330                          */
1331                         ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
1332                         break;
1333                 case 'r':
1334                         ACL_PRIV_SET(mask, ACL_PRIV_READ);
1335                         break;
1336                 case 'w':
1337                         ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
1338                         break;
1339                 case 'x':
1340                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not
1341                          * define any equivalent to the AUTH right, so I've just used
1342                          * 'x' for now.
1343                          */
1344                         ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
1345                         break;
1346                 default:
1347                         break;
1348                 }
1349
1350         }
1351         return(mask);
1352 }
1353
1354 static int
1355 aci_list_has_attr(
1356         struct berval *list,
1357         const char *attr,
1358         struct berval *val )
1359 {
1360         struct berval bv, left, right;
1361         int i;
1362
1363         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1364                 if (aci_get_part(&bv, 0, '=', &left) < 0
1365                         || aci_get_part(&bv, 1, '=', &right) < 0)
1366                 {
1367                         if (aci_strbvcmp(attr, &bv) == 0)
1368                                 return(1);
1369                 } else if (val == NULL) {
1370                         if (aci_strbvcmp(attr, &left) == 0)
1371                                 return(1);
1372                 } else {
1373                         if (aci_strbvcmp(attr, &left) == 0) {
1374                                 /* this is experimental code that implements a
1375                                  * simple (prefix) match of the attribute value.
1376                                  * the ACI draft does not provide for aci's that
1377                                  * apply to specific values, but it would be
1378                                  * nice to have.  If the <attr> part of an aci's
1379                                  * rights list is of the form <attr>=<value>,
1380                                  * that means the aci applies only to attrs with
1381                                  * the given value.  Furthermore, if the attr is
1382                                  * of the form <attr>=<value>*, then <value> is
1383                                  * treated as a prefix, and the aci applies to
1384                                  * any value with that prefix.
1385                                  *
1386                                  * Ideally, this would allow r.e. matches.
1387                                  */
1388                                 if (aci_get_part(&right, 0, '*', &left) < 0
1389                                         || right.bv_len <= left.bv_len)
1390                                 {
1391                                         if (aci_strbvcmp(val->bv_val, &right) == 0)
1392                                                 return(1);
1393                                 } else if (val->bv_len >= left.bv_len) {
1394                                         if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0)
1395                                                 return(1);
1396                                 }
1397                         }
1398                 }
1399         }
1400         return(0);
1401 }
1402
1403 static slap_access_t
1404 aci_list_get_attr_rights(
1405         struct berval *list,
1406         const char *attr,
1407         struct berval *val )
1408 {
1409     struct berval bv;
1410     slap_access_t mask;
1411     int i;
1412
1413         /* loop through each rights/attr pair, skip first part (action) */
1414         ACL_INIT(mask);
1415         for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
1416                 if (aci_list_has_attr(&bv, attr, val) == 0)
1417                         continue;
1418                 if (aci_get_part(list, i, ';', &bv) < 0)
1419                         continue;
1420                 mask |= aci_list_map_rights(&bv);
1421         }
1422         return(mask);
1423 }
1424
1425 static int
1426 aci_list_get_rights(
1427         struct berval *list,
1428         const char *attr,
1429         struct berval *val,
1430         slap_access_t *grant,
1431         slap_access_t *deny )
1432 {
1433     struct berval perm, actn;
1434     slap_access_t *mask;
1435     int i, found;
1436
1437         if (attr == NULL || *attr == 0 || strcasecmp(attr, "entry") == 0) {
1438                 attr = "[entry]";
1439         }
1440
1441         found = 0;
1442         ACL_INIT(*grant);
1443         ACL_INIT(*deny);
1444         /* loop through each permissions clause */
1445         for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) {
1446                 if (aci_get_part(&perm, 0, ';', &actn) < 0)
1447                         continue;
1448                 if (aci_strbvcmp( "grant", &actn ) == 0) {
1449                         mask = grant;
1450                 } else if (aci_strbvcmp( "deny", &actn ) == 0) {
1451                         mask = deny;
1452                 } else {
1453                         continue;
1454                 }
1455
1456                 found = 1;
1457                 *mask |= aci_list_get_attr_rights(&perm, attr, val);
1458                 *mask |= aci_list_get_attr_rights(&perm, "[all]", NULL);
1459         }
1460         return(found);
1461 }
1462
1463 static int
1464 aci_group_member (
1465         struct berval *subj,
1466         const char *defgrpoc,
1467         const char *defgrpat,
1468     Backend             *be,
1469     Entry               *e,
1470     Connection          *conn,
1471     Operation           *op,
1472         regmatch_t      *matches
1473 )
1474 {
1475         struct berval bv;
1476         char *subjdn, *grpdn = NULL;
1477         char *grpoc;
1478         char *grpat;
1479         ObjectClass *grp_oc = NULL;
1480         AttributeDescription *grp_ad = NULL;
1481         const char *text;
1482         int rc;
1483
1484         /* format of string is "group/objectClassValue/groupAttrName" */
1485         if (aci_get_part(subj, 0, '/', &bv) < 0) {
1486                 return(0);
1487         }
1488
1489         subjdn = aci_bvstrdup(&bv);
1490         if (subjdn == NULL) {
1491                 return(0);
1492         }
1493
1494         if (aci_get_part(subj, 1, '/', &bv) < 0) {
1495                 grpoc = ch_strdup( defgrpoc );
1496         } else {
1497                 grpoc = aci_bvstrdup(&bv);
1498         }
1499
1500         if (aci_get_part(subj, 2, '/', &bv) < 0) {
1501                 grpat = ch_strdup( defgrpat );
1502         } else {
1503                 grpat = aci_bvstrdup(&bv);
1504         }
1505
1506         rc = slap_str2ad( grpat, &grp_ad, &text );
1507         if( rc != LDAP_SUCCESS ) {
1508                 rc = 0;
1509                 goto done;
1510         }
1511         rc = 0;
1512
1513         grp_oc = oc_find( grpoc );
1514         grpdn = (char *)ch_malloc(1024);
1515
1516         if (grp_oc != NULL && grp_ad != NULL && grpdn != NULL) {
1517                 string_expand(grpdn, 1024, subjdn, e->e_ndn, matches);
1518                 if ( dn_normalize(grpdn) != NULL ) {
1519                         rc = (backend_group(be, conn, op, e, grpdn, op->o_ndn, grp_oc, grp_ad) == 0);
1520                 }
1521         }
1522
1523 done:
1524         ch_free(grpdn);
1525         ch_free(grpat);
1526         ch_free(grpoc);
1527         ch_free(subjdn);
1528         return(rc);
1529 }
1530
1531 static int
1532 aci_mask(
1533     Backend                     *be,
1534     Connection          *conn,
1535     Operation           *op,
1536     Entry                       *e,
1537         AttributeDescription *desc,
1538     struct berval       *val,
1539     struct berval       *aci,
1540         regmatch_t              *matches,
1541         slap_access_t   *grant,
1542         slap_access_t   *deny
1543 )
1544 {
1545     struct berval bv, perms, sdn;
1546     char *subjdn;
1547         int rc;
1548         char *attr = desc->ad_cname.bv_val;
1549
1550         assert( attr != NULL );
1551
1552         /* parse an aci of the form:
1553                 oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN
1554
1555            See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
1556            a full description of the format for this attribute.
1557
1558            For now, this routine only supports scope=entry.
1559          */
1560
1561         /* check that the aci has all 5 components */
1562         if (aci_get_part(aci, 4, '#', NULL) < 0)
1563                 return(0);
1564
1565         /* check that the aci family is supported */
1566         if (aci_get_part(aci, 0, '#', &bv) < 0)
1567                 return(0);
1568
1569         /* check that the scope is "entry" */
1570         if (aci_get_part(aci, 1, '#', &bv) < 0
1571                 || aci_strbvcmp( "entry", &bv ) != 0)
1572         {
1573                 return(0);
1574         }
1575
1576         /* get the list of permissions clauses, bail if empty */
1577         if (aci_get_part(aci, 2, '#', &perms) <= 0)
1578                 return(0);
1579
1580         /* check if any permissions allow desired access */
1581         if (aci_list_get_rights(&perms, attr, val, grant, deny) == 0)
1582                 return(0);
1583
1584         /* see if we have a DN match */
1585         if (aci_get_part(aci, 3, '#', &bv) < 0)
1586                 return(0);
1587
1588         if (aci_get_part(aci, 4, '#', &sdn) < 0)
1589                 return(0);
1590
1591         if (aci_strbvcmp( "access-id", &bv ) == 0) {
1592                 subjdn = aci_bvstrdup(&sdn);
1593                 if (subjdn == NULL)
1594                         return(0);
1595                 rc = 1;
1596                 if ( dn_normalize(subjdn) != NULL )
1597                         if (strcasecmp(op->o_ndn, subjdn) != 0)
1598                                 rc = 0;
1599                 ch_free(subjdn);
1600                 return(rc);
1601         }
1602
1603         if (aci_strbvcmp( "self", &bv ) == 0) {
1604                 if (strcasecmp(op->o_ndn, e->e_ndn) == 0)
1605                         return(1);
1606
1607         } else if (aci_strbvcmp( "dnattr", &bv ) == 0) {
1608                 char *dnattr = aci_bvstrdup(&sdn);
1609                 Attribute *at;
1610                 AttributeDescription *ad = NULL;
1611                 const char *text;
1612
1613                 rc = slap_str2ad( dnattr, &ad, &text );
1614                 ch_free( dnattr );
1615
1616                 if( rc != LDAP_SUCCESS ) {
1617                         return 0;
1618                 }
1619
1620                 rc = 0;
1621
1622                 bv.bv_val = op->o_ndn;
1623                 bv.bv_len = strlen( bv.bv_val );
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