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 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/regex.h>
  13 #include <ac/socket.h>
  14 #include <ac/string.h>
  15
  16 #include "slap.h"
  17 #include "sets.h"
  18 #include "lber_pvt.h"
  19
  20
  21 /*
  22  * speed up compares
  23  */
  24 static struct berval
  25         aci_bv_entry            = { sizeof("entry") - 1,        "entry" },
  26         aci_bv_br_entry         = { sizeof("[entry]") - 1,      "[entry]" },
  27         aci_bv_br_all           = { sizeof("[all]") - 1,        "[all]" },
  28         aci_bv_access_id        = { sizeof("access-id") - 1,    "access-id" },
  29         aci_bv_anonymous        = { sizeof("anonymous") - 1,    "anonymous" },
  30         aci_bv_users            = { sizeof("users") - 1,        "users" },
  31         aci_bv_self             = { sizeof("self") - 1,         "self" },
  32         aci_bv_dnattr           = { sizeof("dnattr") - 1,       "dnattr" },
  33         aci_bv_group            = { sizeof("group") - 1,        "group" },
  34         aci_bv_role             = { sizeof("role") - 1,         "role" },
  35         aci_bv_set              = { sizeof("set") - 1,          "set" },
  36         aci_bv_set_ref          = { sizeof("set-ref") - 1,      "set-ref"},
  37         aci_bv_grant            = { sizeof("grant") - 1,        "grant" },
  38         aci_bv_deny             = { sizeof("deny") - 1,         "deny" };
  39
  40 static AccessControl * acl_get(
  41         AccessControl *ac, int *count,
  42         Backend *be, Operation *op,
  43         Entry *e,
  44         AttributeDescription *desc,
  45         int nmatches, regmatch_t *matches );
  46
  47 static slap_control_t acl_mask(
  48         AccessControl *ac, slap_mask_t *mask,
  49         Backend *be, Connection *conn, Operation *op,
  50         Entry *e,
  51         AttributeDescription *desc,
  52         struct berval *val,
  53         regmatch_t *matches );
  54
  55 #ifdef SLAPD_ACI_ENABLED
  56 static int aci_mask(
  57         Backend *be,
  58     Connection *conn,
  59         Operation *op,
  60         Entry *e,
  61         AttributeDescription *desc,
  62         struct berval *val,
  63         struct berval *aci,
  64         regmatch_t *matches,
  65         slap_access_t *grant,
  66         slap_access_t *deny );
  67 #endif
  68
  69 static int      regex_matches(
  70         struct berval *pat, char *str, char *buf, regmatch_t *matches);
  71 static void     string_expand(
  72         struct berval *newbuf, struct berval *pattern,
  73         char *match, regmatch_t *matches);
  74
  75 typedef struct AciSetCookie {
  76         Backend *be;
  77         Entry *e;
  78         Connection *conn;
  79         Operation *op;
  80 } AciSetCookie;
  81
  82 SLAP_SET_GATHER aci_set_gather;
  83 static int aci_match_set ( struct berval *subj, Backend *be,
  84     Entry *e, Connection *conn, Operation *op, int setref );
  85
  86 /*
  87  * access_allowed - check whether op->o_ndn is allowed the requested access
  88  * to entry e, attribute attr, value val.  if val is null, access to
  89  * the whole attribute is assumed (all values).
  90  *
  91  * This routine loops through all access controls and calls
  92  * acl_mask() on each applicable access control.
  93  * The loop exits when a definitive answer is reached or
  94  * or no more controls remain.
  95  *
  96  * returns:
  97  *              0       access denied
  98  *              1       access granted
  99  */
 100
 101 int
 102 access_allowed(
 103     Backend             *be,
 104     Connection          *conn,
 105     Operation           *op,
 106     Entry               *e,
 107         AttributeDescription    *desc,
 108     struct berval       *val,
 109     slap_access_t       access )
 110 {
 111         int                             count;
 112         AccessControl   *a;
 113 #ifdef LDAP_DEBUG
 114         char accessmaskbuf[ACCESSMASK_MAXLEN];
 115 #endif
 116         slap_mask_t mask;
 117         slap_control_t control;
 118         const char *attr;
 119         regmatch_t matches[MAXREMATCHES];
 120
 121         assert( e != NULL );
 122         assert( desc != NULL );
 123         assert( access > ACL_NONE );
 124
 125         attr = desc->ad_cname.bv_val;
 126
 127         assert( attr != NULL );
 128
 129 #ifdef NEW_LOGGING
 130         LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
 131                 "access_allowed: conn %d %s access to \"%s\" \"%s\" requested\n",
 132                 conn ? conn->c_connid : -1, access2str( access ), e->e_dn, attr ));
 133 #else
 134         Debug( LDAP_DEBUG_ACL,
 135                 "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
 136             access2str( access ), e->e_dn, attr );
 137 #endif
 138
 139         if ( op == NULL ) {
 140                 /* no-op call */
 141                 return 1;
 142         }
 143
 144         if ( be == NULL ) be = &backends[0];
 145         assert( be != NULL );
 146
 147         /* grant database root access */
 148         if ( be != NULL && be_isroot( be, &op->o_ndn ) ) {
 149 #ifdef NEW_LOGGING
 150                 LDAP_LOG(( "acl", LDAP_LEVEL_INFO,
 151                        "access_allowed: conn %d root access granted\n",
 152                        conn->c_connid));
 153 #else
 154                 Debug( LDAP_DEBUG_ACL,
 155                     "<= root access granted\n",
 156                         0, 0, 0 );
 157 #endif
 158                 return 1;
 159         }
 160
 161         /*
 162          * no-user-modification operational attributes are ignored
 163          * by ACL_WRITE checking as any found here are not provided
 164          * by the user
 165          */
 166         if ( access >= ACL_WRITE && is_at_no_user_mod( desc->ad_type )
 167                 && desc != slap_schema.si_ad_entry
 168                 && desc != slap_schema.si_ad_children )
 169         {
 170 #ifdef NEW_LOGGING
 171                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 172                        "access_allowed: conn %d NoUserMod Operational attribute: %s access granted\n",
 173                        conn->c_connid, attr ));
 174 #else
 175                 Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
 176                         " %s access granted\n",
 177                         attr, 0, 0 );
 178 #endif
 179                 return 1;
 180         }
 181
 182         /* use backend default access if no backend acls */
 183         if( be != NULL && be->be_acl == NULL ) {
 184 #ifdef NEW_LOGGING
 185                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 186                        "access_allowed: conn %d backend default %s access %s to \"%s\"\n",
 187                        conn->c_connid, access2str( access ),
 188                        be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn.bv_val ));
 189 #else
 190                 Debug( LDAP_DEBUG_ACL,
 191                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
 192                         access2str( access ),
 193                         be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn.bv_val );
 194 #endif
 195                 return be->be_dfltaccess >= access;
 196
 197 #ifdef notdef
 198         /* be is always non-NULL */
 199         /* use global default access if no global acls */
 200         } else if ( be == NULL && global_acl == NULL ) {
 201 #ifdef NEW_LOGGING
 202                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 203                        "access_allowed: conn %d global default %s access %s to \"%s\"\n",
 204                        conn->c_connid, access2str( access ),
 205                        global_default_access >= access ? "granted" : "denied", op->o_dn.bv_val ));
 206 #else
 207                 Debug( LDAP_DEBUG_ACL,
 208                         "=> access_allowed: global default %s access %s to \"%s\"\n",
 209                         access2str( access ),
 210                         global_default_access >= access ? "granted" : "denied", op->o_dn.bv_val );
 211 #endif
 212                 return global_default_access >= access;
 213 #endif
 214         }
 215
 216         ACL_INIT(mask);
 217         memset(matches, '\0', sizeof(matches));
 218
 219         control = ACL_BREAK;
 220         a = NULL;
 221         count = 0;
 222
 223         while((a = acl_get( a, &count, be, op, e, desc, MAXREMATCHES, matches )) != NULL)
 224         {
 225                 int i;
 226
 227                 for (i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++) {
 228 #ifdef NEW_LOGGING
 229                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 230                                "access_allowed: conn %d match[%d]:  %d %d ",
 231                                conn->c_connid, i, (int)matches[i].rm_so, (int)matches[i].rm_eo ));
 232 #else
 233                         Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
 234                                (int)matches[i].rm_so, (int)matches[i].rm_eo );
 235 #endif
 236                         if( matches[i].rm_so <= matches[0].rm_eo ) {
 237                                 int n;
 238                                 for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++) {
 239                                         Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
 240                                 }
 241                         }
 242 #ifdef NEW_LOGGING
 243                         LDAP_LOG(( "acl", LDAP_LEVEL_ARGS, "\n" ));
 244 #else
 245                         Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
 246 #endif
 247                 }
 248
 249                 control = acl_mask( a, &mask, be, conn, op,
 250                         e, desc, val, matches );
 251
 252                 if ( control != ACL_BREAK ) {
 253                         break;
 254                 }
 255
 256                 memset(matches, '\0', sizeof(matches));
 257         }
 258
 259         if ( ACL_IS_INVALID( mask ) ) {
 260 #ifdef NEW_LOGGING
 261                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 262                        "access_allowed: conn %d  \"%s\" (%s) invalid!\n",
 263                        conn->c_connid, e->e_dn, attr ));
 264 #else
 265                 Debug( LDAP_DEBUG_ACL,
 266                         "=> access_allowed: \"%s\" (%s) invalid!\n",
 267                         e->e_dn, attr, 0 );
 268 #endif
 269                 ACL_INIT( mask );
 270
 271         } else if ( control == ACL_BREAK ) {
 272 #ifdef NEW_LOGGING
 273                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 274                        "access_allowed: conn %d  no more rules\n", conn->c_connid ));
 275 #else
 276                 Debug( LDAP_DEBUG_ACL,
 277                         "=> access_allowed: no more rules\n", 0, 0, 0);
 278 #endif
 279                 ACL_INIT( mask );
 280         }
 281
 282 #ifdef NEW_LOGGING
 283         LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
 284                    "access_allowed: conn %d  %s access %s by %s\n",
 285                    conn->c_connid,
 286                    access2str( access ),
 287                    ACL_GRANT( mask, access ) ? "granted" : "denied",
 288                    accessmask2str( mask, accessmaskbuf ) ));
 289 #else
 290         Debug( LDAP_DEBUG_ACL,
 291                 "=> access_allowed: %s access %s by %s\n",
 292                 access2str( access ),
 293                 ACL_GRANT(mask, access) ? "granted" : "denied",
 294                 accessmask2str( mask, accessmaskbuf ) );
 295 #endif
 296         return ACL_GRANT(mask, access);
 297 }
 298
 299 /*
 300  * acl_get - return the acl applicable to entry e, attribute
 301  * attr.  the acl returned is suitable for use in subsequent calls to
 302  * acl_access_allowed().
 303  */
 304
 305 static AccessControl *
 306 acl_get(
 307         AccessControl *a,
 308         int                     *count,
 309     Backend             *be,
 310     Operation   *op,
 311     Entry               *e,
 312         AttributeDescription *desc,
 313     int                 nmatch,
 314     regmatch_t  *matches )
 315 {
 316         const char *attr;
 317         int dnlen, patlen;
 318
 319         assert( e != NULL );
 320         assert( count != NULL );
 321         assert( desc != NULL );
 322
 323         attr = desc->ad_cname.bv_val;
 324
 325         assert( attr != NULL );
 326
 327         if( a == NULL ) {
 328                 if( be == NULL ) {
 329                         a = global_acl;
 330                 } else {
 331                         a = be->be_acl;
 332                 }
 333
 334                 assert( a != NULL );
 335
 336         } else {
 337                 a = a->acl_next;
 338         }
 339
 340         dnlen = e->e_nname.bv_len;
 341
 342         for ( ; a != NULL; a = a->acl_next ) {
 343                 (*count) ++;
 344
 345                 if (a->acl_dn_pat.bv_len != 0) {
 346                         if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
 347 #ifdef NEW_LOGGING
 348                                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 349                                            "acl_get: dnpat [%d] %s nsub: %d\n",
 350                                            *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub ));
 351 #else
 352                                 Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
 353                                         *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub );
 354 #endif
 355                                 if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
 356                                         continue;
 357
 358                         } else {
 359 #ifdef NEW_LOGGING
 360                                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 361                                            "acl_get: dn [%d] %s\n",
 362                                            *count, a->acl_dn_pat.bv_val ));
 363 #else
 364                                 Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
 365                                         *count, a->acl_dn_pat.bv_val, 0 );
 366 #endif
 367                                 patlen = a->acl_dn_pat.bv_len;
 368                                 if ( dnlen < patlen )
 369                                         continue;
 370
 371                                 if ( a->acl_dn_style == ACL_STYLE_BASE ) {
 372                                         /* base dn -- entire object DN must match */
 373                                         if ( dnlen != patlen )
 374                                                 continue;
 375
 376                                 } else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
 377                                         int rdnlen = -1;
 378
 379                                         if ( dnlen <= patlen )
 380                                                 continue;
 381
 382                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 383                                                 continue;
 384
 385                                         rdnlen = dn_rdnlen( NULL, &e->e_nname );
 386                                         if ( rdnlen != dnlen - patlen - 1 )
 387                                                 continue;
 388
 389                                 } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
 390                                         if ( dnlen > patlen && !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 391                                                 continue;
 392
 393                                 } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
 394                                         if ( dnlen <= patlen )
 395                                                 continue;
 396                                         if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
 397                                                 continue;
 398                                 }
 399
 400                                 if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
 401                                         continue;
 402                         }
 403
 404 #ifdef NEW_LOGGING
 405                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 406                                    "acl_get: [%d] matched\n",
 407                                    *count ));
 408 #else
 409                         Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
 410                                 *count, 0, 0 );
 411 #endif
 412                 }
 413
 414                 if ( a->acl_filter != NULL ) {
 415                         ber_int_t rc = test_filter( NULL, NULL, NULL, e, a->acl_filter );
 416                         if ( rc != LDAP_COMPARE_TRUE ) {
 417                                 continue;
 418                         }
 419                 }
 420
 421 #ifdef NEW_LOGGING
 422                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 423                            "acl_get: [%d] check attr %s\n",
 424                            *count, attr ));
 425 #else
 426                 Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] check attr %s\n",
 427                        *count, attr, 0);
 428 #endif
 429                 if ( attr == NULL || a->acl_attrs == NULL ||
 430                         ad_inlist( desc, a->acl_attrs ) )
 431                 {
 432 #ifdef NEW_LOGGING
 433                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 434                                    "acl_get:  [%d] acl %s attr: %s\n",
 435                                    *count, e->e_dn, attr ));
 436 #else
 437                         Debug( LDAP_DEBUG_ACL,
 438                                 "<= acl_get: [%d] acl %s attr: %s\n",
 439                                 *count, e->e_dn, attr );
 440 #endif
 441                         return a;
 442                 }
 443                 matches[0].rm_so = matches[0].rm_eo = -1;
 444         }
 445
 446 #ifdef NEW_LOGGING
 447         LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
 448                    "acl_get: done.\n" ));
 449 #else
 450         Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
 451 #endif
 452         return( NULL );
 453 }
 454
 455
 456 /*
 457  * acl_mask - modifies mask based upon the given acl and the
 458  * requested access to entry e, attribute attr, value val.  if val
 459  * is null, access to the whole attribute is assumed (all values).
 460  *
 461  * returns      0       access NOT allowed
 462  *              1       access allowed
 463  */
 464
 465 static slap_control_t
 466 acl_mask(
 467     AccessControl       *a,
 468         slap_mask_t *mask,
 469     Backend             *be,
 470     Connection  *conn,
 471     Operation   *op,
 472     Entry               *e,
 473         AttributeDescription *desc,
 474     struct berval       *val,
 475         regmatch_t      *matches
 476 )
 477 {
 478         int             i, odnlen, patlen;
 479         Access  *b;
 480 #ifdef LDAP_DEBUG
 481         char accessmaskbuf[ACCESSMASK_MAXLEN];
 482 #endif
 483         const char *attr;
 484
 485         assert( a != NULL );
 486         assert( mask != NULL );
 487         assert( desc != NULL );
 488
 489         attr = desc->ad_cname.bv_val;
 490
 491         assert( attr != NULL );
 492
 493 #ifdef NEW_LOGGING
 494         LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
 495                    "acl_mask: conn %d  access to entry \"%s\", attr \"%s\" requested\n",
 496                    conn->c_connid, e->e_dn, attr ));
 497
 498         LDAP_LOG(( "acl", LDAP_LEVEL_ARGS,
 499                    " to %s by \"%s\", (%s) \n",
 500                    val ? "value" : "all values",
 501                    op->o_ndn.bv_val ? op->o_ndn.bv_val : "",
 502                    accessmask2str( *mask, accessmaskbuf ) ));
 503 #else
 504         Debug( LDAP_DEBUG_ACL,
 505                 "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
 506                 e->e_dn, attr, 0 );
 507
 508         Debug( LDAP_DEBUG_ACL,
 509                 "=> acl_mask: to %s by \"%s\", (%s) \n",
 510                 val ? "value" : "all values",
 511                 op->o_ndn.bv_val ?  op->o_ndn.bv_val : "",
 512                 accessmask2str( *mask, accessmaskbuf ) );
 513 #endif
 514
 515         for ( i = 1, b = a->acl_access; b != NULL; b = b->a_next, i++ ) {
 516                 slap_mask_t oldmask, modmask;
 517
 518                 ACL_INVALIDATE( modmask );
 519
 520                 /* AND <who> clauses */
 521                 if ( b->a_dn_pat.bv_len != 0 ) {
 522 #ifdef NEW_LOGGING
 523                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 524                                    "acl_mask: conn %d  check a_dn_pat: %s\n",
 525                                    conn->c_connid, b->a_dn_pat.bv_val ));
 526 #else
 527                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
 528                                 b->a_dn_pat.bv_val, 0, 0);
 529 #endif
 530                         /*
 531                          * if access applies to the entry itself, and the
 532                          * user is bound as somebody in the same namespace as
 533                          * the entry, OR the given dn matches the dn pattern
 534                          */
 535                         if ( ber_bvcmp( &b->a_dn_pat, &aci_bv_anonymous ) == 0 ) {
 536                                 if ( op->o_ndn.bv_len != 0 ) {
 537                                         continue;
 538                                 }
 539
 540                         } else if ( ber_bvcmp( &b->a_dn_pat, &aci_bv_users ) == 0 ) {
 541                                 if ( op->o_ndn.bv_len == 0 ) {
 542                                         continue;
 543                                 }
 544
 545                         } else if ( ber_bvcmp( &b->a_dn_pat, &aci_bv_self ) == 0 ) {
 546                                 if ( op->o_ndn.bv_len == 0 ) {
 547                                         continue;
 548                                 }
 549
 550                                 if ( e->e_dn == NULL || !dn_match( &e->e_nname, &op->o_ndn ) ) {
 551                                         continue;
 552                                 }
 553
 554                         } else if ( b->a_dn_style == ACL_STYLE_REGEX ) {
 555                                 if ( ber_bvccmp( &b->a_dn_pat, '*' ) == 0 ) {
 556                                         int ret = regex_matches( &b->a_dn_pat,
 557                                                 op->o_ndn.bv_val, e->e_ndn, matches );
 558
 559                                         if( ret == 0 ) {
 560                                                 continue;
 561                                         }
 562                                 }
 563
 564                         } else {
 565                                 if ( e->e_dn == NULL )
 566                                         continue;
 567
 568                                 patlen = b->a_dn_pat.bv_len;
 569                                 odnlen = op->o_ndn.bv_len;
 570                                 if ( odnlen < patlen )
 571                                         continue;
 572
 573                                 if ( b->a_dn_style == ACL_STYLE_BASE ) {
 574                                         /* base dn -- entire object DN must match */
 575                                         if ( odnlen != patlen )
 576                                                 continue;
 577
 578                                 } else if ( b->a_dn_style == ACL_STYLE_ONE ) {
 579                                         int rdnlen = -1;
 580
 581                                         if ( odnlen <= patlen )
 582                                                 continue;
 583
 584                                         if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) )
 585                                                 continue;
 586
 587                                         rdnlen = dn_rdnlen( NULL, &op->o_ndn );
 588                                         if ( rdnlen != odnlen - patlen - 1 )
 589                                                 continue;
 590
 591                                 } else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) {
 592                                         if ( odnlen > patlen && !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) )
 593                                                 continue;
 594
 595                                 } else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) {
 596                                         if ( odnlen <= patlen )
 597                                                 continue;
 598                                         if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) )
 599                                                 continue;
 600                                 }
 601
 602                                 if ( strcmp( b->a_dn_pat.bv_val, op->o_ndn.bv_val + odnlen - patlen ) != 0 )
 603                                         continue;
 604                         }
 605                 }
 606
 607                 if ( b->a_sockurl_pat.bv_len ) {
 608 #ifdef NEW_LOGGING
 609                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 610                                    "acl_mask: conn %d  check a_sockurl_pat: %s\n",
 611                                    conn->c_connid, b->a_sockurl_pat.bv_val ));
 612 #else
 613                         Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
 614                                 b->a_sockurl_pat.bv_val, 0, 0 );
 615 #endif
 616
 617                         if ( ber_bvccmp( &b->a_sockurl_pat, '*' ) != 0) {
 618                                 if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
 619                                         if (!regex_matches( &b->a_sockurl_pat, conn->c_listener_url.bv_val,
 620                                                         e->e_ndn, matches ) )
 621                                         {
 622                                                 continue;
 623                                         }
 624                                 } else {
 625                                         if ( ber_bvstrcasecmp( &b->a_sockurl_pat, &conn->c_listener_url ) != 0 )
 626                                                 continue;
 627                                 }
 628                         }
 629                 }
 630
 631                 if ( b->a_domain_pat.bv_len ) {
 632 #ifdef NEW_LOGGING
 633                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 634                                    "acl_mask: conn %d  check a_domain_pat: %s\n",
 635                                    conn->c_connid, b->a_domain_pat.bv_val ));
 636 #else
 637                         Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
 638                                 b->a_domain_pat.bv_val, 0, 0 );
 639 #endif
 640                         if ( ber_bvccmp( &b->a_domain_pat, '*' ) != 0) {
 641                                 if ( b->a_domain_style == ACL_STYLE_REGEX) {
 642                                         if (!regex_matches( &b->a_domain_pat, conn->c_peer_domain.bv_val,
 643                                                         e->e_ndn, matches ) )
 644                                         {
 645                                                 continue;
 646                                         }
 647                                 } else {
 648                                         if ( ber_bvstrcasecmp( &b->a_domain_pat, &conn->c_peer_domain ) != 0 )
 649                                                 continue;
 650                                 }
 651                         }
 652                 }
 653
 654                 if ( b->a_peername_pat.bv_len ) {
 655 #ifdef NEW_LOGGING
 656                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 657                                    "acl_mask: conn %d  check a_perrname_path: %s\n",
 658                                    conn->c_connid, b->a_peername_pat.bv_val ));
 659 #else
 660                         Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
 661                                 b->a_peername_pat.bv_val, 0, 0 );
 662 #endif
 663                         if ( ber_bvccmp( &b->a_peername_pat, '*' ) != 0) {
 664                                 if ( b->a_peername_style == ACL_STYLE_REGEX) {
 665                                         if (!regex_matches( &b->a_peername_pat, conn->c_peer_name.bv_val,
 666                                                         e->e_ndn, matches ) )
 667                                         {
 668                                                 continue;
 669                                         }
 670                                 } else {
 671                                         if ( ber_bvstrcasecmp( &b->a_peername_pat, &conn->c_peer_name ) != 0 )
 672                                                 continue;
 673                                 }
 674                         }
 675                 }
 676
 677                 if ( b->a_sockname_pat.bv_len ) {
 678 #ifdef NEW_LOGGING
 679                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 680                                    "acl_mask: conn %d  check a_sockname_path: %s\n",
 681                                    conn->c_connid, b->a_sockname_pat.bv_val ));
 682 #else
 683                         Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
 684                                 b->a_sockname_pat.bv_val, 0, 0 );
 685 #endif
 686                         if ( ber_bvccmp( &b->a_sockname_pat, '*' ) != 0) {
 687                                 if ( b->a_sockname_style == ACL_STYLE_REGEX) {
 688                                         if (!regex_matches( &b->a_sockname_pat, conn->c_sock_name.bv_val,
 689                                                         e->e_ndn, matches ) )
 690                                         {
 691                                                 continue;
 692                                         }
 693                                 } else {
 694                                         if ( ber_bvstrcasecmp( &b->a_sockname_pat, &conn->c_sock_name ) != 0 )
 695                                                 continue;
 696                                 }
 697                         }
 698                 }
 699
 700                 if ( b->a_dn_at != NULL && op->o_ndn.bv_len != 0 ) {
 701                         Attribute       *at;
 702                         struct berval   bv;
 703                         int rc, match = 0;
 704                         const char *text;
 705                         const char *attr = b->a_dn_at->ad_cname.bv_val;
 706
 707                         assert( attr != NULL );
 708
 709 #ifdef NEW_LOGGING
 710                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 711                                    "acl_mask: conn %d  check a_dn_pat: %s\n",
 712                                    conn->c_connid, attr ));
 713 #else
 714                         Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
 715                                 attr, 0, 0);
 716 #endif
 717                         bv = op->o_ndn;
 718
 719                         /* see if asker is listed in dnattr */
 720                         for( at = attrs_find( e->e_attrs, b->a_dn_at );
 721                                 at != NULL;
 722                                 at = attrs_find( at->a_next, b->a_dn_at ) )
 723                         {
 724                                 if( value_find( b->a_dn_at, at->a_vals, &bv ) == 0 ) {
 725                                         /* found it */
 726                                         match = 1;
 727                                         break;
 728                                 }
 729                         }
 730
 731                         if( match ) {
 732                                 /* have a dnattr match. if this is a self clause then
 733                                  * the target must also match the op dn.
 734                                  */
 735                                 if ( b->a_dn_self ) {
 736                                         /* check if the target is an attribute. */
 737                                         if ( val == NULL )
 738                                                 continue;
 739                                         /* target is attribute, check if the attribute value
 740                                          * is the op dn.
 741                                          */
 742                                         rc = value_match( &match, b->a_dn_at,
 743                                                 b->a_dn_at->ad_type->sat_equality, 0,
 744                                                 val, &bv, &text );
 745                                         /* on match error or no match, fail the ACL clause */
 746                                         if (rc != LDAP_SUCCESS || match != 0 )
 747                                                 continue;
 748                                 }
 749                         } else {
 750                                 /* no dnattr match, check if this is a self clause */
 751                                 if ( ! b->a_dn_self )
 752                                         continue;
 753                                 /* this is a self clause, check if the target is an
 754                                  * attribute.
 755                                  */
 756                                 if ( val == NULL )
 757                                         continue;
 758                                 /* target is attribute, check if the attribute value
 759                                  * is the op dn.
 760                                  */
 761                                 rc = value_match( &match, b->a_dn_at,
 762                                         b->a_dn_at->ad_type->sat_equality, 0,
 763                                         val, &bv, &text );
 764
 765                                 /* on match error or no match, fail the ACL clause */
 766                                 if (rc != LDAP_SUCCESS || match != 0 )
 767                                         continue;
 768                         }
 769                 }
 770
 771                 if ( b->a_group_pat.bv_len && op->o_ndn.bv_len ) {
 772                         char buf[1024];
 773                         struct berval bv = { sizeof(buf) - 1, buf };
 774                         struct berval ndn = { 0, NULL };
 775                         int rc;
 776
 777                         /* b->a_group is an unexpanded entry name, expanded it should be an
 778                          * entry with objectclass group* and we test to see if odn is one of
 779                          * the values in the attribute group
 780                          */
 781                         /* see if asker is listed in dnattr */
 782                         if ( b->a_group_style == ACL_STYLE_REGEX ) {
 783                                 string_expand(&bv, &b->a_group_pat, e->e_ndn, matches);
 784                                 if ( dnNormalize2(NULL, &bv, &ndn) != LDAP_SUCCESS ) {
 785                                         /* did not expand to a valid dn */
 786                                         continue;
 787                                 }
 788                                 bv = ndn;
 789                         } else {
 790                                 bv = b->a_group_pat;
 791                         }
 792
 793                         rc = backend_group(be, conn, op, e, &bv, &op->o_ndn,
 794                                 b->a_group_oc, b->a_group_at);
 795                         if ( ndn.bv_val )
 796                                 free( ndn.bv_val );
 797                         if ( rc != 0 ) {
 798                                 continue;
 799                         }
 800                 }
 801
 802                 if ( b->a_set_pat.bv_len != 0 ) {
 803                         if (aci_match_set( &b->a_set_pat, be, e, conn, op, 0 ) == 0) {
 804                                 continue;
 805                         }
 806                 }
 807
 808                 if ( b->a_authz.sai_ssf ) {
 809 #ifdef NEW_LOGGING
 810                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 811                                    "acl_mask: conn %d  check a_authz.sai_ssf: ACL %u > OP %u\n",
 812                                    conn->c_connid, b->a_authz.sai_ssf, op->o_ssf ));
 813 #else
 814                         Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
 815                                 b->a_authz.sai_ssf, op->o_ssf, 0 );
 816 #endif
 817                         if ( b->a_authz.sai_ssf >  op->o_ssf ) {
 818                                 continue;
 819                         }
 820                 }
 821
 822                 if ( b->a_authz.sai_transport_ssf ) {
 823 #ifdef NEW_LOGGING
 824                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 825                                    "acl_mask: conn %d  check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
 826                                    conn->c_connid, b->a_authz.sai_transport_ssf, op->o_transport_ssf ));
 827 #else
 828                         Debug( LDAP_DEBUG_ACL,
 829                                 "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
 830                                 b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
 831 #endif
 832                         if ( b->a_authz.sai_transport_ssf >  op->o_transport_ssf ) {
 833                                 continue;
 834                         }
 835                 }
 836
 837                 if ( b->a_authz.sai_tls_ssf ) {
 838 #ifdef NEW_LOGGING
 839                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 840                                    "acl_mask: conn %d  check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
 841                                    conn->c_connid, b->a_authz.sai_tls_ssf, op->o_tls_ssf ));
 842 #else
 843                         Debug( LDAP_DEBUG_ACL,
 844                                 "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
 845                                 b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
 846 #endif
 847                         if ( b->a_authz.sai_tls_ssf >  op->o_tls_ssf ) {
 848                                 continue;
 849                         }
 850                 }
 851
 852                 if ( b->a_authz.sai_sasl_ssf ) {
 853 #ifdef NEW_LOGGING
 854                         LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
 855                                    "acl_mask: conn %d check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
 856                                    conn->c_connid, b->a_authz.sai_sasl_ssf, op->o_sasl_ssf ));
 857 #else
 858                         Debug( LDAP_DEBUG_ACL,
 859                                 "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
 860                                 b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
 861 #endif
 862                         if ( b->a_authz.sai_sasl_ssf >  op->o_sasl_ssf ) {
 863                                 continue;
 864                         }
 865                 }
 866
 867 #ifdef SLAPD_ACI_ENABLED
 868                 if ( b->a_aci_at != NULL ) {
 869                         Attribute       *at;
 870                         slap_access_t grant, deny, tgrant, tdeny;
 871
 872                         /* this case works different from the others above.
 873                          * since aci's themselves give permissions, we need
 874                          * to first check b->a_access_mask, the ACL's access level.
 875                          */
 876
 877                         if ( e->e_nname.bv_len == 0 ) {
 878                                 /* no ACIs in the root DSE */
 879                                 continue;
 880                         }
 881
 882                         /* first check if the right being requested
 883                          * is allowed by the ACL clause.
 884                          */
 885                         if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
 886                                 continue;
 887                         }
 888
 889                         /* get the aci attribute */
 890                         at = attr_find( e->e_attrs, b->a_aci_at );
 891                         if ( at == NULL ) {
 892                                 continue;
 893                         }
 894
 895                         /* start out with nothing granted, nothing denied */
 896                         ACL_INIT(tgrant);
 897                         ACL_INIT(tdeny);
 898
 899                         /* the aci is an multi-valued attribute.  The
 900                          * rights are determined by OR'ing the individual
 901                          * rights given by the acis.
 902                          */
 903                         for ( i = 0; at->a_vals[i].bv_val != NULL; i++ ) {
 904                                 if (aci_mask( be, conn, op,
 905                                         e, desc, val, &at->a_vals[i],
 906                                         matches, &grant, &deny ) != 0)
 907                                 {
 908                                         tgrant |= grant;
 909                                         tdeny |= deny;
 910                                 }
 911                         }
 912
 913                         /* remove anything that the ACL clause does not allow */
 914                         tgrant &= b->a_access_mask & ACL_PRIV_MASK;
 915                         tdeny &= ACL_PRIV_MASK;
 916
 917                         /* see if we have anything to contribute */
 918                         if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
 919                                 continue;
 920                         }
 921
 922                         /* this could be improved by changing acl_mask so that it can deal with
 923                          * by clauses that return grant/deny pairs.  Right now, it does either
 924                          * additive or subtractive rights, but not both at the same time.  So,
 925                          * we need to combine the grant/deny pair into a single rights mask in
 926                          * a smart way:  if either grant or deny is "empty", then we use the
 927                          * opposite as is, otherwise we remove any denied rights from the grant
 928                          * rights mask and construct an additive mask.
 929                          */
 930                         if (ACL_IS_INVALID(tdeny)) {
 931                                 modmask = tgrant | ACL_PRIV_ADDITIVE;
 932
 933                         } else if (ACL_IS_INVALID(tgrant)) {
 934                                 modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
 935
 936                         } else {
 937                                 modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
 938                         }
 939
 940                 } else
 941 #endif
 942                 {
 943                         modmask = b->a_access_mask;
 944                 }
 945
 946 #ifdef NEW_LOGGING
 947                 LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
 948                            "acl_mask: conn %d  [%d] applying %s (%s)\n",
 949                            conn->c_connid, i, accessmask2str( modmask, accessmaskbuf),
 950                            b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK
 951                            ? "break" : "stop" ));
 952 #else
 953                 Debug( LDAP_DEBUG_ACL,
 954                         "<= acl_mask: [%d] applying %s (%s)\n",
 955                         i, accessmask2str( modmask, accessmaskbuf ),
 956                         b->a_type == ACL_CONTINUE
 957                                 ? "continue"
 958                                 : b->a_type == ACL_BREAK
 959                                         ? "break"
 960                                         : "stop" );
 961 #endif
 962                 /* save old mask */
 963                 oldmask = *mask;
 964
 965                 if( ACL_IS_ADDITIVE(modmask) ) {
 966                         /* add privs */
 967                         ACL_PRIV_SET( *mask, modmask );
 968
 969                         /* cleanup */
 970                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
 971
 972                 } else if( ACL_IS_SUBTRACTIVE(modmask) ) {
 973                         /* substract privs */
 974                         ACL_PRIV_CLR( *mask, modmask );
 975
 976                         /* cleanup */
 977                         ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
 978
 979                 } else {
 980                         /* assign privs */
 981                         *mask = modmask;
 982                 }
 983
 984 #ifdef NEW_LOGGING
 985                 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
 986                            "acl_mask: conn %d  [%d] mask: %s\n",
 987                            conn->c_connid, i, accessmask2str( *mask, accessmaskbuf) ));
 988 #else
 989                 Debug( LDAP_DEBUG_ACL,
 990                         "<= acl_mask: [%d] mask: %s\n",
 991                         i, accessmask2str(*mask, accessmaskbuf), 0 );
 992 #endif
 993
 994                 if( b->a_type == ACL_CONTINUE ) {
 995                         continue;
 996
 997                 } else if ( b->a_type == ACL_BREAK ) {
 998                         return ACL_BREAK;
 999
1000                 } else {
1001                         return ACL_STOP;
1002                 }
1003         }
1004
1005         /* implicit "by * none" clause */
1006         ACL_INIT(*mask);
1007
1008 #ifdef NEW_LOGGING
1009         LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
1010                    "acl_mask: conn %d  no more <who> clauses, returning %d (stop)\n",
1011                    conn->c_connid, accessmask2str( *mask, accessmaskbuf) ));
1012 #else
1013         Debug( LDAP_DEBUG_ACL,
1014                 "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
1015                 accessmask2str(*mask, accessmaskbuf), 0, 0 );
1016 #endif
1017         return ACL_STOP;
1018 }
1019
1020 /*
1021  * acl_check_modlist - check access control on the given entry to see if
1022  * it allows the given modifications by the user associated with op.
1023  * returns      1       if mods allowed ok
1024  *                      0       mods not allowed
1025  */
1026
1027 int
1028 acl_check_modlist(
1029     Backend     *be,
1030     Connection  *conn,
1031     Operation   *op,
1032     Entry       *e,
1033     Modifications       *mlist
1034 )
1035 {
1036         struct berval *bv;
1037
1038         assert( be != NULL );
1039
1040         /* short circuit root database access */
1041         if ( be_isroot( be, &op->o_ndn ) ) {
1042 #ifdef NEW_LOGGING
1043                 LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
1044                            "acl_check_modlist: conn %d  access granted to root user\n",
1045                            conn->c_connid ));
1046 #else
1047                 Debug( LDAP_DEBUG_ACL,
1048                         "<= acl_access_allowed: granted to database root\n",
1049                     0, 0, 0 );
1050 #endif
1051                 return 1;
1052         }
1053
1054         /* use backend default access if no backend acls */
1055         if( be != NULL && be->be_acl == NULL ) {
1056 #ifdef NEW_LOGGING
1057                 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1058                            "acl_check_modlist: conn %d  backend default %s access %s to \"%s\"\n",
1059                            conn->c_connid, access2str( ACL_WRITE ),
1060                            be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn.bv_val ));
1061 #else
1062                 Debug( LDAP_DEBUG_ACL,
1063                         "=> access_allowed: backend default %s access %s to \"%s\"\n",
1064                         access2str( ACL_WRITE ),
1065                         be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn.bv_val );
1066 #endif
1067                 return be->be_dfltaccess >= ACL_WRITE;
1068
1069 #ifdef notdef
1070         /* be is always non-NULL */
1071         /* use global default access if no global acls */
1072         } else if ( be == NULL && global_acl == NULL ) {
1073 #ifdef NEW_LOGGING
1074                 LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1075                            "acl_check_modlist: conn %d  global default %s access %s to \"%s\"\n",
1076                            conn->c_connid, access2str( ACL_WRITE ),
1077                            global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
1078 #else
1079                 Debug( LDAP_DEBUG_ACL,
1080                         "=> access_allowed: global default %s access %s to \"%s\"\n",
1081                         access2str( ACL_WRITE ),
1082                         global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn );
1083 #endif
1084                 return global_default_access >= ACL_WRITE;
1085 #endif
1086         }
1087
1088         for ( ; mlist != NULL; mlist = mlist->sml_next ) {
1089                 /*
1090                  * no-user-modification operational attributes are ignored
1091                  * by ACL_WRITE checking as any found here are not provided
1092                  * by the user
1093                  */
1094                 if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) {
1095 #ifdef NEW_LOGGING
1096                         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1097                                    "acl_check_modlist: conn %d  no-user-mod %s: modify access granted\n",
1098                                    conn->c_connid, mlist->sml_desc->ad_cname.bv_val ));
1099 #else
1100                         Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
1101                                 " modify access granted\n",
1102                                 mlist->sml_desc->ad_cname.bv_val, 0, 0 );
1103 #endif
1104                         continue;
1105                 }
1106
1107                 switch ( mlist->sml_op ) {
1108                 case LDAP_MOD_REPLACE:
1109                         /*
1110                          * We must check both permission to delete the whole
1111                          * attribute and permission to add the specific attributes.
1112                          * This prevents abuse from selfwriters.
1113                          */
1114                         if ( ! access_allowed( be, conn, op, e,
1115                                 mlist->sml_desc, NULL, ACL_WRITE ) )
1116                         {
1117                                 return( 0 );
1118                         }
1119
1120                         if ( mlist->sml_bvalues == NULL ) break;
1121
1122                         /* fall thru to check value to add */
1123
1124                 case LDAP_MOD_ADD:
1125                         assert( mlist->sml_bvalues != NULL );
1126
1127                         for ( bv = mlist->sml_bvalues; bv->bv_val != NULL; bv++ ) {
1128                                 if ( ! access_allowed( be, conn, op, e,
1129                                         mlist->sml_desc, bv, ACL_WRITE ) )
1130                                 {
1131                                         return( 0 );
1132                                 }
1133                         }
1134                         break;
1135
1136                 case LDAP_MOD_DELETE:
1137                         if ( mlist->sml_bvalues == NULL ) {
1138                                 if ( ! access_allowed( be, conn, op, e,
1139                                         mlist->sml_desc, NULL, ACL_WRITE ) )
1140                                 {
1141                                         return( 0 );
1142                                 }
1143                                 break;
1144                         }
1145                         for ( bv = mlist->sml_bvalues; bv->bv_val != NULL; bv++ ) {
1146                                 if ( ! access_allowed( be, conn, op, e,
1147                                         mlist->sml_desc, bv, ACL_WRITE ) )
1148                                 {
1149                                         return( 0 );
1150                                 }
1151                         }
1152                         break;
1153
1154                 case SLAP_MOD_SOFTADD:
1155                         /* allow adding attribute via modrdn thru */
1156                         break;
1157
1158                 default:
1159                         assert( 0 );
1160                         return( 0 );
1161                 }
1162         }
1163
1164         return( 1 );
1165 }
1166
1167 static char *
1168 aci_bvstrdup( struct berval *bv )
1169 {
1170         char *s;
1171
1172         s = (char *)ch_malloc(bv->bv_len + 1);
1173         if (s != NULL) {
1174                 AC_MEMCPY(s, bv->bv_val, bv->bv_len);
1175                 s[bv->bv_len] = 0;
1176         }
1177         return(s);
1178 }
1179
1180 static int
1181 aci_get_part(
1182         struct berval *list,
1183         int ix,
1184         char sep,
1185         struct berval *bv )
1186 {
1187         int len;
1188         char *p;
1189
1190         if (bv) {
1191                 bv->bv_len = 0;
1192                 bv->bv_val = NULL;
1193         }
1194         len = list->bv_len;
1195         p = list->bv_val;
1196         while (len >= 0 && --ix >= 0) {
1197                 while (--len >= 0 && *p++ != sep) ;
1198         }
1199         while (len >= 0 && *p == ' ') {
1200                 len--;
1201                 p++;
1202         }
1203         if (len < 0)
1204                 return(-1);
1205
1206         if (!bv)
1207                 return(0);
1208
1209         bv->bv_val = p;
1210         while (--len >= 0 && *p != sep) {
1211                 bv->bv_len++;
1212                 p++;
1213         }
1214         while (bv->bv_len > 0 && *--p == ' ')
1215                 bv->bv_len--;
1216         return(bv->bv_len);
1217 }
1218
1219 BerVarray
1220 aci_set_gather (void *cookie, struct berval *name, struct berval *attr)
1221 {
1222         AciSetCookie *cp = cookie;
1223         BerVarray bvals = NULL;
1224         struct berval ndn;
1225
1226         /* this routine needs to return the bervals instead of
1227          * plain strings, since syntax is not known.  It should
1228          * also return the syntax or some "comparison cookie".
1229          */
1230
1231         if (dnNormalize2(NULL, name, &ndn) == LDAP_SUCCESS) {
1232                 const char *text;
1233                 AttributeDescription *desc = NULL;
1234                 if (slap_bv2ad(attr, &desc, &text) == LDAP_SUCCESS) {
1235                         backend_attribute(cp->be, NULL, NULL,
1236                                 cp->e, &ndn, desc, &bvals);
1237                 }
1238                 free(ndn.bv_val);
1239         }
1240         return(bvals);
1241 }
1242
1243 static int
1244 aci_match_set (
1245         struct berval *subj,
1246     Backend *be,
1247     Entry *e,
1248     Connection *conn,
1249     Operation *op,
1250     int setref
1251 )
1252 {
1253         struct berval set = { 0, NULL };
1254         int rc = 0;
1255         AciSetCookie cookie;
1256
1257         if (setref == 0) {
1258                 ber_dupbv( &set, subj );
1259         } else {
1260                 struct berval subjdn, ndn = { 0, NULL };
1261                 struct berval setat;
1262                 BerVarray bvals;
1263                 const char *text;
1264                 AttributeDescription *desc = NULL;
1265
1266                 /* format of string is "entry/setAttrName" */
1267                 if (aci_get_part(subj, 0, '/', &subjdn) < 0) {
1268                         return(0);
1269                 } else {
1270                         /* FIXME: If dnNormalize was based on ldap_bv2dn
1271                          * instead of ldap_str2dn and would honor the bv_len
1272                          * we could skip this step and not worry about the
1273                          * unterminated string.
1274                          */
1275                         char *s = ch_malloc(subjdn.bv_len + 1);
1276                         AC_MEMCPY(s, subjdn.bv_val, subjdn.bv_len);
1277                         subjdn.bv_val = s;
1278                 }
1279
1280                 if ( aci_get_part(subj, 1, '/', &setat) < 0 ) {
1281                         setat.bv_val = SLAPD_ACI_SET_ATTR;
1282                         setat.bv_len = sizeof(SLAPD_ACI_SET_ATTR)-1;
1283                 }
1284                 if ( setat.bv_val != NULL ) {
1285                         if ( dnNormalize2(NULL, &subjdn, &ndn) == LDAP_SUCCESS
1286                                 && slap_bv2ad(&setat, &desc, &text) == LDAP_SUCCESS )
1287                         {
1288                                 backend_attribute(be, NULL, NULL, e,
1289                                         &ndn, desc, &bvals);
1290                                 if ( bvals != NULL ) {
1291                                         if ( bvals[0].bv_val != NULL ) {
1292                                                 int i;
1293                                                 set = bvals[0];
1294                                                 bvals[0].bv_val = NULL;
1295                                                 for (i=1;bvals[i].bv_val;i++);
1296                                                 bvals[0].bv_val = bvals[i-1].bv_val;
1297                                                 bvals[i-1].bv_val = NULL;
1298                                         }
1299                                         ber_bvarray_free(bvals);
1300                                 }
1301                         }
1302                         if (ndn.bv_val)
1303                                 free(ndn.bv_val);
1304                 }
1305                 ch_free(subjdn.bv_val);
1306         }
1307
1308         if (set.bv_val != NULL) {
1309                 cookie.be = be;
1310                 cookie.e = e;
1311                 cookie.conn = conn;
1312                 cookie.op = op;
1313                 rc = (slap_set_filter(aci_set_gather, &cookie, &set,
1314                         &op->o_ndn, &e->e_nname, NULL) > 0);
1315                 ch_free(set.bv_val);
1316         }
1317         return(rc);
1318 }
1319
1320 #ifdef SLAPD_ACI_ENABLED
1321 static int
1322 aci_list_map_rights(
1323         struct berval *list )
1324 {
1325         struct berval bv;
1326         slap_access_t mask;
1327         int i;
1328
1329         ACL_INIT(mask);
1330         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1331                 if (bv.bv_len <= 0)
1332                         continue;
1333                 switch (*bv.bv_val) {
1334                 case 'c':
1335                         ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
1336                         break;
1337                 case 's':
1338                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines
1339                          * the right 's' to mean "set", but in the examples states
1340                          * that the right 's' means "search".  The latter definition
1341                          * is used here.
1342                          */
1343                         ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
1344                         break;
1345                 case 'r':
1346                         ACL_PRIV_SET(mask, ACL_PRIV_READ);
1347                         break;
1348                 case 'w':
1349                         ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
1350                         break;
1351                 case 'x':
1352                         /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not
1353                          * define any equivalent to the AUTH right, so I've just used
1354                          * 'x' for now.
1355                          */
1356                         ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
1357                         break;
1358                 default:
1359                         break;
1360                 }
1361
1362         }
1363         return(mask);
1364 }
1365
1366 static int
1367 aci_list_has_attr(
1368         struct berval *list,
1369         const struct berval *attr,
1370         struct berval *val )
1371 {
1372         struct berval bv, left, right;
1373         int i;
1374
1375         for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
1376                 if (aci_get_part(&bv, 0, '=', &left) < 0
1377                         || aci_get_part(&bv, 1, '=', &right) < 0)
1378                 {
1379                         if (ber_bvstrcasecmp(attr, &bv) == 0)
1380                                 return(1);
1381                 } else if (val == NULL) {
1382                         if (ber_bvstrcasecmp(attr, &left) == 0)
1383                                 return(1);
1384                 } else {
1385                         if (ber_bvstrcasecmp(attr, &left) == 0) {
1386                                 /* this is experimental code that implements a
1387                                  * simple (prefix) match of the attribute value.
1388                                  * the ACI draft does not provide for aci's that
1389                                  * apply to specific values, but it would be
1390                                  * nice to have.  If the <attr> part of an aci's
1391                                  * rights list is of the form <attr>=<value>,
1392                                  * that means the aci applies only to attrs with
1393                                  * the given value.  Furthermore, if the attr is
1394                                  * of the form <attr>=<value>*, then <value> is
1395                                  * treated as a prefix, and the aci applies to
1396                                  * any value with that prefix.
1397                                  *
1398                                  * Ideally, this would allow r.e. matches.
1399                                  */
1400                                 if (aci_get_part(&right, 0, '*', &left) < 0
1401                                         || right.bv_len <= left.bv_len)
1402                                 {
1403                                         if (ber_bvstrcasecmp(val, &right) == 0)
1404                                                 return(1);
1405                                 } else if (val->bv_len >= left.bv_len) {
1406                                         if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0)
1407                                                 return(1);
1408                                 }
1409                         }
1410                 }
1411         }
1412         return(0);
1413 }
1414
1415 static slap_access_t
1416 aci_list_get_attr_rights(
1417         struct berval *list,
1418         const struct berval *attr,
1419         struct berval *val )
1420 {
1421     struct berval bv;
1422     slap_access_t mask;
1423     int i;
1424
1425         /* loop through each rights/attr pair, skip first part (action) */
1426         ACL_INIT(mask);
1427         for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
1428                 if (aci_list_has_attr(&bv, attr, val) == 0)
1429                         continue;
1430                 if (aci_get_part(list, i, ';', &bv) < 0)
1431                         continue;
1432                 mask |= aci_list_map_rights(&bv);
1433         }
1434         return(mask);
1435 }
1436
1437 static int
1438 aci_list_get_rights(
1439         struct berval *list,
1440         const struct berval *attr,
1441         struct berval *val,
1442         slap_access_t *grant,
1443         slap_access_t *deny )
1444 {
1445     struct berval perm, actn;
1446     slap_access_t *mask;
1447     int i, found;
1448
1449         if (attr == NULL || attr->bv_len == 0
1450                         || ber_bvstrcasecmp( attr, &aci_bv_entry ) == 0) {
1451                 attr = &aci_bv_br_entry;
1452         }
1453
1454         found = 0;
1455         ACL_INIT(*grant);
1456         ACL_INIT(*deny);
1457         /* loop through each permissions clause */
1458         for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) {
1459                 if (aci_get_part(&perm, 0, ';', &actn) < 0)
1460                         continue;
1461                 if (ber_bvstrcasecmp( &aci_bv_grant, &actn ) == 0) {
1462                         mask = grant;
1463                 } else if (ber_bvstrcasecmp( &aci_bv_deny, &actn ) == 0) {
1464                         mask = deny;
1465                 } else {
1466                         continue;
1467                 }
1468
1469                 found = 1;
1470                 *mask |= aci_list_get_attr_rights(&perm, attr, val);
1471                 *mask |= aci_list_get_attr_rights(&perm, &aci_bv_br_all, NULL);
1472         }
1473         return(found);
1474 }
1475
1476 static int
1477 aci_group_member (
1478         struct berval *subj,
1479         struct berval *defgrpoc,
1480         struct berval *defgrpat,
1481     Backend             *be,
1482     Entry               *e,
1483     Connection          *conn,
1484     Operation           *op,
1485         regmatch_t      *matches
1486 )
1487 {
1488         struct berval bv;
1489         struct berval subjdn;
1490         struct berval grpoc;
1491         struct berval grpat;
1492         ObjectClass *grp_oc = NULL;
1493         AttributeDescription *grp_ad = NULL;
1494         const char *text;
1495         int rc;
1496
1497         /* format of string is "group/objectClassValue/groupAttrName" */
1498         if (aci_get_part(subj, 0, '/', &subjdn) < 0) {
1499                 return(0);
1500         }
1501
1502         if (aci_get_part(subj, 1, '/', &grpoc) < 0) {
1503                 grpoc = *defgrpoc;
1504         }
1505
1506         if (aci_get_part(subj, 2, '/', &grpat) < 0) {
1507                 grpat = *defgrpat;
1508         }
1509
1510         rc = slap_bv2ad( &grpat, &grp_ad, &text );
1511         if( rc != LDAP_SUCCESS ) {
1512                 rc = 0;
1513                 goto done;
1514         }
1515         rc = 0;
1516
1517         grp_oc = oc_bvfind( &grpoc );
1518
1519         if (grp_oc != NULL && grp_ad != NULL ) {
1520                 struct berval ndn;
1521                 bv.bv_val = (char *)ch_malloc(1024);
1522                 bv.bv_len = 1024;
1523                 string_expand(&bv, &subjdn, e->e_ndn, matches);
1524                 if ( dnNormalize2(NULL, &bv, &ndn) == LDAP_SUCCESS ) {
1525                         rc = (backend_group(be, conn, op, e, &ndn, &op->o_ndn, grp_oc, grp_ad) == 0);
1526                         free( ndn.bv_val );
1527                 }
1528                 ch_free(bv.bv_val);
1529         }
1530
1531 done:
1532         return(rc);
1533 }
1534
1535 static struct berval GroupClass = {
1536         sizeof(SLAPD_GROUP_CLASS)-1, SLAPD_GROUP_CLASS };
1537 static struct berval GroupAttr = {
1538         sizeof(SLAPD_GROUP_ATTR)-1, SLAPD_GROUP_ATTR };
1539 static struct berval RoleClass = {
1540         sizeof(SLAPD_ROLE_CLASS)-1, SLAPD_ROLE_CLASS };
1541 static struct berval RoleAttr = {
1542         sizeof(SLAPD_ROLE_ATTR)-1, SLAPD_ROLE_ATTR };
1543
1544 static int
1545 aci_mask(
1546     Backend                     *be,
1547     Connection          *conn,
1548     Operation           *op,
1549     Entry                       *e,
1550         AttributeDescription *desc,
1551     struct berval       *val,
1552     struct berval       *aci,
1553         regmatch_t              *matches,
1554         slap_access_t   *grant,
1555         slap_access_t   *deny
1556 )
1557 {
1558     struct berval bv, perms, sdn;
1559         int rc;
1560
1561
1562         assert( desc->ad_cname.bv_val != NULL );
1563
1564         /* parse an aci of the form:
1565                 oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN
1566
1567            See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
1568            a full description of the format for this attribute.
1569
1570            For now, this routine only supports scope=entry.
1571          */
1572
1573         /* check that the aci has all 5 components */
1574         if (aci_get_part(aci, 4, '#', NULL) < 0)
1575                 return(0);
1576
1577         /* check that the aci family is supported */
1578         if (aci_get_part(aci, 0, '#', &bv) < 0)
1579                 return(0);
1580
1581         /* check that the scope is "entry" */
1582         if (aci_get_part(aci, 1, '#', &bv) < 0
1583                 || ber_bvstrcasecmp( &aci_bv_entry, &bv ) != 0)
1584         {
1585                 return(0);
1586         }
1587
1588         /* get the list of permissions clauses, bail if empty */
1589         if (aci_get_part(aci, 2, '#', &perms) <= 0)
1590                 return(0);
1591
1592         /* check if any permissions allow desired access */
1593         if (aci_list_get_rights(&perms, &desc->ad_cname, val, grant, deny) == 0)
1594                 return(0);
1595
1596         /* see if we have a DN match */
1597         if (aci_get_part(aci, 3, '#', &bv) < 0)
1598                 return(0);
1599
1600         if (aci_get_part(aci, 4, '#', &sdn) < 0)
1601                 return(0);
1602
1603         if (ber_bvstrcasecmp( &aci_bv_access_id, &bv ) == 0) {
1604                 struct berval ndn;
1605                 rc = 1;
1606                 if ( dnNormalize2(NULL, &sdn, &ndn) == LDAP_SUCCESS ) {
1607                         if (!dn_match( &op->o_ndn, &ndn))
1608                                 rc = 0;
1609                         free(ndn.bv_val);
1610                 }
1611                 return(rc);
1612         }
1613
1614         if (ber_bvstrcasecmp( &aci_bv_self, &bv ) == 0) {
1615                 if (dn_match(&op->o_ndn, &e->e_nname))
1616                         return(1);
1617
1618         } else if (ber_bvstrcasecmp( &aci_bv_dnattr, &bv ) == 0) {
1619                 Attribute *at;
1620                 AttributeDescription *ad = NULL;
1621                 const char *text;
1622
1623                 rc = slap_bv2ad( &sdn, &ad, &text );
1624
1625                 if( rc != LDAP_SUCCESS ) {
1626                         return 0;
1627                 }
1628
1629                 rc = 0;
1630
1631                 bv = op->o_ndn;
1632
1633                 for(at = attrs_find( e->e_attrs, ad );
1634                         at != NULL;
1635                         at = attrs_find( at->a_next, ad ) )
1636                 {
1637                         if (value_find( ad, at->a_vals, &bv) == 0 ) {
1638                                 rc = 1;
1639                                 break;
1640                         }
1641                 }
1642
1643                 return rc;
1644
1645
1646         } else if (ber_bvstrcasecmp( &aci_bv_group, &bv ) == 0) {
1647                 if (aci_group_member(&sdn, &GroupClass, &GroupAttr, be, e, conn, op, matches))
1648                         return(1);
1649
1650         } else if (ber_bvstrcasecmp( &aci_bv_role, &bv ) == 0) {
1651                 if (aci_group_member(&sdn, &RoleClass, &RoleAttr, be, e, conn, op, matches))
1652                         return(1);
1653
1654         } else if (ber_bvstrcasecmp( &aci_bv_set, &bv ) == 0) {
1655                 if (aci_match_set(&sdn, be, e, conn, op, 0))
1656                         return(1);
1657
1658         } else if (ber_bvstrcasecmp( &aci_bv_set_ref, &bv ) == 0) {
1659                 if (aci_match_set(&sdn, be, e, conn, op, 1))
1660                         return(1);
1661
1662         }
1663
1664         return(0);
1665 }
1666
1667 #endif  /* SLAPD_ACI_ENABLED */
1668
1669 static void
1670 string_expand(
1671         struct berval *bv,
1672         struct berval *pat,
1673         char *match,
1674         regmatch_t *matches)
1675 {
1676         ber_len_t       size;
1677         char   *sp;
1678         char   *dp;
1679         int     flag;
1680
1681         size = 0;
1682         bv->bv_val[0] = '\0';
1683         bv->bv_len--; /* leave space for lone $ */
1684
1685         flag = 0;
1686         for ( dp = bv->bv_val, sp = pat->bv_val; size < bv->bv_len &&
1687                 sp < pat->bv_val + pat->bv_len ; sp++) {
1688                 /* did we previously see a $ */
1689                 if (flag) {
1690                         if (*sp == '$') {
1691                                 *dp++ = '$';
1692                                 size++;
1693                         } else if (*sp >= '0' && *sp <= '9' ) {
1694                                 int     n;
1695                                 int     i;
1696                                 int     l;
1697
1698                                 n = *sp - '0';
1699                                 *dp = '\0';
1700                                 i = matches[n].rm_so;
1701                                 l = matches[n].rm_eo;
1702                                 for ( ; size < bv->bv_len && i < l; size++, i++ ) {
1703                                         *dp++ = match[i];
1704                                         size++;
1705                                 }
1706                                 *dp = '\0';
1707                         }
1708                         flag = 0;
1709                 } else {
1710                         if (*sp == '$') {
1711                                 flag = 1;
1712                         } else {
1713                                 *dp++ = *sp;
1714                                 size++;
1715                         }
1716                 }
1717         }
1718
1719         if (flag) {
1720                 /* must have ended with a single $ */
1721                 *dp++ = '$';
1722                 size++;
1723         }
1724
1725         *dp = '\0';
1726         bv->bv_len = size;
1727
1728 #ifdef NEW_LOGGING
1729         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1730                    "string_expand:  pattern = %.*s\n", pat->bv_len, pat->bv_val ));
1731         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
1732                    "string_expand:  expanded = %s\n", bv->bv_val ));
1733 #else
1734         Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern:  %.*s\n", pat->bv_len, pat->bv_val, 0 );
1735         Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", bv->bv_val, 0, 0 );
1736 #endif
1737 }
1738
1739 static int
1740 regex_matches(
1741         struct berval *pat,                     /* pattern to expand and match against */
1742         char *str,                              /* string to match against pattern */
1743         char *buf,                              /* buffer with $N expansion variables */
1744         regmatch_t *matches             /* offsets in buffer for $N expansion variables */
1745 )
1746 {
1747         regex_t re;
1748         char newbuf[512];
1749         struct berval bv = {sizeof(newbuf), newbuf};
1750         int     rc;
1751
1752         if(str == NULL) str = "";
1753
1754         string_expand(&bv, pat, buf, matches);
1755         if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) {
1756                 char error[512];
1757                 regerror(rc, &re, error, sizeof(error));
1758
1759 #ifdef NEW_LOGGING
1760                 LDAP_LOG(( "aci", LDAP_LEVEL_ERR,
1761                            "regex_matches: compile( \"%s\", \"%s\") failed %s\n",
1762                            pat->bv_val, str, error ));
1763 #else
1764                 Debug( LDAP_DEBUG_TRACE,
1765                     "compile( \"%s\", \"%s\") failed %s\n",
1766                         pat->bv_val, str, error );
1767 #endif
1768                 return( 0 );
1769         }
1770
1771         rc = regexec(&re, str, 0, NULL, 0);
1772         regfree( &re );
1773
1774 #ifdef NEW_LOGGING
1775         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1776                    "regex_matches: string:   %s\n", str ));
1777         LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
1778                    "regex_matches: rc:  %d  %s\n",
1779                    rc, rc ? "matches" : "no matches" ));
1780 #else
1781         Debug( LDAP_DEBUG_TRACE,
1782             "=> regex_matches: string:   %s\n", str, 0, 0 );
1783         Debug( LDAP_DEBUG_TRACE,
1784             "=> regex_matches: rc: %d %s\n",
1785                 rc, !rc ? "matches" : "no matches", 0 );
1786 #endif
1787         return( !rc );
1788 }
1789