libcli/security/security_descriptor.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    security descriptror utility functions
   5
   6    Copyright (C) Andrew Tridgell                2004
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/security/security.h"
  24
  25 /*
  26   return a blank security descriptor (no owners, dacl or sacl)
  27 */
  28 struct security_descriptor *security_descriptor_initialise(TALLOC_CTX *mem_ctx)
  29 {
  30         struct security_descriptor *sd;
  31
  32         sd = talloc(mem_ctx, struct security_descriptor);
  33         if (!sd) {
  34                 return NULL;
  35         }
  36
  37         sd->revision = SD_REVISION;
  38         /* we mark as self relative, even though it isn't while it remains
  39            a pointer in memory because this simplifies the ndr code later.
  40            All SDs that we store/emit are in fact SELF_RELATIVE
  41         */
  42         sd->type = SEC_DESC_SELF_RELATIVE;
  43
  44         sd->owner_sid = NULL;
  45         sd->group_sid = NULL;
  46         sd->sacl = NULL;
  47         sd->dacl = NULL;
  48
  49         return sd;
  50 }
  51
  52 struct security_acl *security_acl_dup(TALLOC_CTX *mem_ctx,
  53                                              const struct security_acl *oacl)
  54 {
  55         struct security_acl *nacl;
  56
  57         if (oacl == NULL) {
  58                 return NULL;
  59         }
  60
  61         if (oacl->aces == NULL && oacl->num_aces > 0) {
  62                 return NULL;
  63         }
  64
  65         nacl = talloc (mem_ctx, struct security_acl);
  66         if (nacl == NULL) {
  67                 return NULL;
  68         }
  69
  70         *nacl = (struct security_acl) {
  71                 .revision = oacl->revision,
  72                 .size     = oacl->size,
  73                 .num_aces = oacl->num_aces,
  74         };
  75         if (nacl->num_aces == 0) {
  76                 return nacl;
  77         }
  78
  79         nacl->aces = (struct security_ace *)talloc_memdup (nacl, oacl->aces, sizeof(struct security_ace) * oacl->num_aces);
  80         if (nacl->aces == NULL) {
  81                 goto failed;
  82         }
  83
  84         return nacl;
  85
  86  failed:
  87         talloc_free (nacl);
  88         return NULL;
  89
  90 }
  91
  92 struct security_acl *security_acl_concatenate(TALLOC_CTX *mem_ctx,
  93                                               const struct security_acl *acl1,
  94                                               const struct security_acl *acl2)
  95 {
  96         struct security_acl *nacl;
  97         uint32_t i;
  98
  99         if (!acl1 && !acl2)
 100                 return NULL;
 101
 102         if (!acl1){
 103                 nacl = security_acl_dup(mem_ctx, acl2);
 104                 return nacl;
 105         }
 106
 107         if (!acl2){
 108                 nacl = security_acl_dup(mem_ctx, acl1);
 109                 return nacl;
 110         }
 111
 112         nacl = talloc (mem_ctx, struct security_acl);
 113         if (nacl == NULL) {
 114                 return NULL;
 115         }
 116
 117         nacl->revision = acl1->revision;
 118         nacl->size = acl1->size + acl2->size;
 119         nacl->num_aces = acl1->num_aces + acl2->num_aces;
 120
 121         if (nacl->num_aces == 0)
 122                 return nacl;
 123
 124         nacl->aces = (struct security_ace *)talloc_array (mem_ctx, struct security_ace, acl1->num_aces+acl2->num_aces);
 125         if ((nacl->aces == NULL) && (nacl->num_aces > 0)) {
 126                 goto failed;
 127         }
 128
 129         for (i = 0; i < acl1->num_aces; i++)
 130                 nacl->aces[i] = acl1->aces[i];
 131         for (i = 0; i < acl2->num_aces; i++)
 132                 nacl->aces[i + acl1->num_aces] = acl2->aces[i];
 133
 134         return nacl;
 135
 136  failed:
 137         talloc_free (nacl);
 138         return NULL;
 139
 140 }
 141
 142 /*
 143    talloc and copy a security descriptor
 144  */
 145 struct security_descriptor *security_descriptor_copy(TALLOC_CTX *mem_ctx,
 146                                                      const struct security_descriptor *osd)
 147 {
 148         struct security_descriptor *nsd;
 149
 150         nsd = talloc_zero(mem_ctx, struct security_descriptor);
 151         if (!nsd) {
 152                 return NULL;
 153         }
 154
 155         if (osd->owner_sid) {
 156                 nsd->owner_sid = dom_sid_dup(nsd, osd->owner_sid);
 157                 if (nsd->owner_sid == NULL) {
 158                         goto failed;
 159                 }
 160         }
 161
 162         if (osd->group_sid) {
 163                 nsd->group_sid = dom_sid_dup(nsd, osd->group_sid);
 164                 if (nsd->group_sid == NULL) {
 165                         goto failed;
 166                 }
 167         }
 168
 169         if (osd->sacl) {
 170                 nsd->sacl = security_acl_dup(nsd, osd->sacl);
 171                 if (nsd->sacl == NULL) {
 172                         goto failed;
 173                 }
 174         }
 175
 176         if (osd->dacl) {
 177                 nsd->dacl = security_acl_dup(nsd, osd->dacl);
 178                 if (nsd->dacl == NULL) {
 179                         goto failed;
 180                 }
 181         }
 182
 183         nsd->revision = osd->revision;
 184         nsd->type = osd->type;
 185
 186         return nsd;
 187
 188  failed:
 189         talloc_free(nsd);
 190
 191         return NULL;
 192 }
 193
 194 NTSTATUS security_descriptor_for_client(TALLOC_CTX *mem_ctx,
 195                                         const struct security_descriptor *ssd,
 196                                         uint32_t sec_info,
 197                                         uint32_t access_granted,
 198                                         struct security_descriptor **_csd)
 199 {
 200         struct security_descriptor *csd = NULL;
 201         uint32_t access_required = 0;
 202
 203         *_csd = NULL;
 204
 205         if (sec_info & (SECINFO_OWNER|SECINFO_GROUP)) {
 206                 access_required |= SEC_STD_READ_CONTROL;
 207         }
 208         if (sec_info & SECINFO_DACL) {
 209                 access_required |= SEC_STD_READ_CONTROL;
 210         }
 211         if (sec_info & SECINFO_SACL) {
 212                 access_required |= SEC_FLAG_SYSTEM_SECURITY;
 213         }
 214
 215         if (access_required & (~access_granted)) {
 216                 return NT_STATUS_ACCESS_DENIED;
 217         }
 218
 219         /*
 220          * make a copy...
 221          */
 222         csd = security_descriptor_copy(mem_ctx, ssd);
 223         if (csd == NULL) {
 224                 return NT_STATUS_NO_MEMORY;
 225         }
 226
 227         /*
 228          * ... and remove everthing not wanted
 229          */
 230
 231         if (!(sec_info & SECINFO_OWNER)) {
 232                 TALLOC_FREE(csd->owner_sid);
 233                 csd->type &= ~SEC_DESC_OWNER_DEFAULTED;
 234         }
 235         if (!(sec_info & SECINFO_GROUP)) {
 236                 TALLOC_FREE(csd->group_sid);
 237                 csd->type &= ~SEC_DESC_GROUP_DEFAULTED;
 238         }
 239         if (!(sec_info & SECINFO_DACL)) {
 240                 TALLOC_FREE(csd->dacl);
 241                 csd->type &= ~(
 242                         SEC_DESC_DACL_PRESENT |
 243                         SEC_DESC_DACL_DEFAULTED|
 244                         SEC_DESC_DACL_AUTO_INHERIT_REQ |
 245                         SEC_DESC_DACL_AUTO_INHERITED |
 246                         SEC_DESC_DACL_PROTECTED |
 247                         SEC_DESC_DACL_TRUSTED);
 248         }
 249         if (!(sec_info & SECINFO_SACL)) {
 250                 TALLOC_FREE(csd->sacl);
 251                 csd->type &= ~(
 252                         SEC_DESC_SACL_PRESENT |
 253                         SEC_DESC_SACL_DEFAULTED |
 254                         SEC_DESC_SACL_AUTO_INHERIT_REQ |
 255                         SEC_DESC_SACL_AUTO_INHERITED |
 256                         SEC_DESC_SACL_PROTECTED |
 257                         SEC_DESC_SERVER_SECURITY);
 258         }
 259
 260         *_csd = csd;
 261         return NT_STATUS_OK;
 262 }
 263
 264 /*
 265   add an ACE to an ACL of a security_descriptor
 266 */
 267
 268 static NTSTATUS security_descriptor_acl_add(struct security_descriptor *sd,
 269                                             bool add_to_sacl,
 270                                             const struct security_ace *ace,
 271                                             ssize_t _idx)
 272 {
 273         struct security_acl *acl = NULL;
 274         ssize_t idx;
 275
 276         if (add_to_sacl) {
 277                 acl = sd->sacl;
 278         } else {
 279                 acl = sd->dacl;
 280         }
 281
 282         if (acl == NULL) {
 283                 acl = talloc(sd, struct security_acl);
 284                 if (acl == NULL) {
 285                         return NT_STATUS_NO_MEMORY;
 286                 }
 287                 acl->revision = SECURITY_ACL_REVISION_NT4;
 288                 acl->size     = 0;
 289                 acl->num_aces = 0;
 290                 acl->aces     = NULL;
 291         }
 292
 293         if (_idx < 0) {
 294                 idx = (acl->num_aces + 1) + _idx;
 295         } else {
 296                 idx = _idx;
 297         }
 298
 299         if (idx < 0) {
 300                 return NT_STATUS_ARRAY_BOUNDS_EXCEEDED;
 301         } else if (idx > acl->num_aces) {
 302                 return NT_STATUS_ARRAY_BOUNDS_EXCEEDED;
 303         }
 304
 305         acl->aces = talloc_realloc(acl, acl->aces,
 306                                    struct security_ace, acl->num_aces+1);
 307         if (acl->aces == NULL) {
 308                 return NT_STATUS_NO_MEMORY;
 309         }
 310
 311         ARRAY_INSERT_ELEMENT(acl->aces, acl->num_aces, *ace, idx);
 312         acl->num_aces++;
 313
 314         switch (acl->aces[idx].type) {
 315         case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
 316         case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
 317         case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
 318         case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
 319                 acl->revision = SECURITY_ACL_REVISION_ADS;
 320                 break;
 321         default:
 322                 break;
 323         }
 324
 325         if (add_to_sacl) {
 326                 sd->sacl = acl;
 327                 sd->type |= SEC_DESC_SACL_PRESENT;
 328         } else {
 329                 sd->dacl = acl;
 330                 sd->type |= SEC_DESC_DACL_PRESENT;
 331         }
 332
 333         return NT_STATUS_OK;
 334 }
 335
 336 /*
 337   add an ACE to the SACL of a security_descriptor
 338 */
 339
 340 NTSTATUS security_descriptor_sacl_add(struct security_descriptor *sd,
 341                                       const struct security_ace *ace)
 342 {
 343         return security_descriptor_acl_add(sd, true, ace, -1);
 344 }
 345
 346 /*
 347   insert an ACE at a given index to the SACL of a security_descriptor
 348
 349   idx can be negative, which means it's related to the new size from the
 350   end, so -1 means the ace is appended at the end.
 351 */
 352
 353 NTSTATUS security_descriptor_sacl_insert(struct security_descriptor *sd,
 354                                          const struct security_ace *ace,
 355                                          ssize_t idx)
 356 {
 357         return security_descriptor_acl_add(sd, true, ace, idx);
 358 }
 359
 360 /*
 361   add an ACE to the DACL of a security_descriptor
 362 */
 363
 364 NTSTATUS security_descriptor_dacl_add(struct security_descriptor *sd,
 365                                       const struct security_ace *ace)
 366 {
 367         return security_descriptor_acl_add(sd, false, ace, -1);
 368 }
 369
 370 /*
 371   insert an ACE at a given index to the DACL of a security_descriptor
 372
 373   idx can be negative, which means it's related to the new size from the
 374   end, so -1 means the ace is appended at the end.
 375 */
 376
 377 NTSTATUS security_descriptor_dacl_insert(struct security_descriptor *sd,
 378                                          const struct security_ace *ace,
 379                                          ssize_t idx)
 380 {
 381         return security_descriptor_acl_add(sd, false, ace, idx);
 382 }
 383
 384 /*
 385   delete the ACE corresponding to the given trustee in an ACL of a
 386   security_descriptor
 387 */
 388
 389 static NTSTATUS security_descriptor_acl_del(struct security_descriptor *sd,
 390                                             bool sacl_del,
 391                                             const struct dom_sid *trustee)
 392 {
 393         uint32_t i;
 394         bool found = false;
 395         struct security_acl *acl = NULL;
 396
 397         if (sacl_del) {
 398                 acl = sd->sacl;
 399         } else {
 400                 acl = sd->dacl;
 401         }
 402
 403         if (acl == NULL) {
 404                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 405         }
 406
 407         /* there can be multiple ace's for one trustee */
 408         for (i=0;i<acl->num_aces;i++) {
 409                 if (dom_sid_equal(trustee, &acl->aces[i].trustee)) {
 410                         ARRAY_DEL_ELEMENT(acl->aces, i, acl->num_aces);
 411                         acl->num_aces--;
 412                         if (acl->num_aces == 0) {
 413                                 acl->aces = NULL;
 414                         }
 415                         found = true;
 416                 }
 417         }
 418
 419         if (!found) {
 420                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 421         }
 422
 423         acl->revision = SECURITY_ACL_REVISION_NT4;
 424
 425         for (i=0;i<acl->num_aces;i++) {
 426                 switch (acl->aces[i].type) {
 427                 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
 428                 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
 429                 case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
 430                 case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
 431                         acl->revision = SECURITY_ACL_REVISION_ADS;
 432                         return NT_STATUS_OK;
 433                 default:
 434                         break; /* only for the switch statement */
 435                 }
 436         }
 437
 438         return NT_STATUS_OK;
 439 }
 440
 441 /*
 442   delete the ACE corresponding to the given trustee in the DACL of a
 443   security_descriptor
 444 */
 445
 446 NTSTATUS security_descriptor_dacl_del(struct security_descriptor *sd,
 447                                       const struct dom_sid *trustee)
 448 {
 449         return security_descriptor_acl_del(sd, false, trustee);
 450 }
 451
 452 /*
 453   delete the ACE corresponding to the given trustee in the SACL of a
 454   security_descriptor
 455 */
 456
 457 NTSTATUS security_descriptor_sacl_del(struct security_descriptor *sd,
 458                                       const struct dom_sid *trustee)
 459 {
 460         return security_descriptor_acl_del(sd, true, trustee);
 461 }
 462
 463 /*
 464   delete the given ACE in the SACL or DACL of a security_descriptor
 465 */
 466 static NTSTATUS security_descriptor_acl_del_ace(struct security_descriptor *sd,
 467                                                 bool sacl_del,
 468                                                 const struct security_ace *ace)
 469 {
 470         uint32_t i;
 471         bool found = false;
 472         struct security_acl *acl = NULL;
 473
 474         if (sacl_del) {
 475                 acl = sd->sacl;
 476         } else {
 477                 acl = sd->dacl;
 478         }
 479
 480         if (acl == NULL) {
 481                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 482         }
 483
 484         for (i=0;i<acl->num_aces;i++) {
 485                 if (security_ace_equal(ace, &acl->aces[i])) {
 486                         ARRAY_DEL_ELEMENT(acl->aces, i, acl->num_aces);
 487                         acl->num_aces--;
 488                         if (acl->num_aces == 0) {
 489                                 acl->aces = NULL;
 490                         }
 491                         found = true;
 492                         i--;
 493                 }
 494         }
 495
 496         if (!found) {
 497                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 498         }
 499
 500         acl->revision = SECURITY_ACL_REVISION_NT4;
 501
 502         for (i=0;i<acl->num_aces;i++) {
 503                 switch (acl->aces[i].type) {
 504                 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
 505                 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
 506                 case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
 507                 case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
 508                         acl->revision = SECURITY_ACL_REVISION_ADS;
 509                         return NT_STATUS_OK;
 510                 default:
 511                         break; /* only for the switch statement */
 512                 }
 513         }
 514
 515         return NT_STATUS_OK;
 516 }
 517
 518 NTSTATUS security_descriptor_dacl_del_ace(struct security_descriptor *sd,
 519                                           const struct security_ace *ace)
 520 {
 521         return security_descriptor_acl_del_ace(sd, false, ace);
 522 }
 523
 524 NTSTATUS security_descriptor_sacl_del_ace(struct security_descriptor *sd,
 525                                           const struct security_ace *ace)
 526 {
 527         return security_descriptor_acl_del_ace(sd, true, ace);
 528 }
 529 /*
 530   compare two security ace structures
 531 */
 532 bool security_ace_equal(const struct security_ace *ace1,
 533                         const struct security_ace *ace2)
 534 {
 535         if (ace1 == ace2) {
 536                 return true;
 537         }
 538         if ((ace1 == NULL) || (ace2 == NULL)) {
 539                 return false;
 540         }
 541         if (ace1->type != ace2->type) {
 542                 return false;
 543         }
 544         if (ace1->flags != ace2->flags) {
 545                 return false;
 546         }
 547         if (ace1->access_mask != ace2->access_mask) {
 548                 return false;
 549         }
 550         if (!dom_sid_equal(&ace1->trustee, &ace2->trustee)) {
 551                 return false;
 552         }
 553
 554         return true;
 555 }
 556
 557
 558 /*
 559   compare two security acl structures
 560 */
 561 bool security_acl_equal(const struct security_acl *acl1,
 562                         const struct security_acl *acl2)
 563 {
 564         uint32_t i;
 565
 566         if (acl1 == acl2) return true;
 567         if (!acl1 || !acl2) return false;
 568         if (acl1->revision != acl2->revision) return false;
 569         if (acl1->num_aces != acl2->num_aces) return false;
 570
 571         for (i=0;i<acl1->num_aces;i++) {
 572                 if (!security_ace_equal(&acl1->aces[i], &acl2->aces[i])) return false;
 573         }
 574         return true;
 575 }
 576
 577 /*
 578   compare two security descriptors.
 579 */
 580 bool security_descriptor_equal(const struct security_descriptor *sd1,
 581                                const struct security_descriptor *sd2)
 582 {
 583         if (sd1 == sd2) return true;
 584         if (!sd1 || !sd2) return false;
 585         if (sd1->revision != sd2->revision) return false;
 586         if (sd1->type != sd2->type) return false;
 587
 588         if (!dom_sid_equal(sd1->owner_sid, sd2->owner_sid)) return false;
 589         if (!dom_sid_equal(sd1->group_sid, sd2->group_sid)) return false;
 590         if (!security_acl_equal(sd1->sacl, sd2->sacl))      return false;
 591         if (!security_acl_equal(sd1->dacl, sd2->dacl))      return false;
 592
 593         return true;
 594 }
 595
 596 /*
 597   compare two security descriptors, but allow certain (missing) parts
 598   to be masked out of the comparison
 599 */
 600 bool security_descriptor_mask_equal(const struct security_descriptor *sd1,
 601                                     const struct security_descriptor *sd2,
 602                                     uint32_t mask)
 603 {
 604         if (sd1 == sd2) return true;
 605         if (!sd1 || !sd2) return false;
 606         if (sd1->revision != sd2->revision) return false;
 607         if ((sd1->type & mask) != (sd2->type & mask)) return false;
 608
 609         if (!dom_sid_equal(sd1->owner_sid, sd2->owner_sid)) return false;
 610         if (!dom_sid_equal(sd1->group_sid, sd2->group_sid)) return false;
 611         if ((mask & SEC_DESC_DACL_PRESENT) && !security_acl_equal(sd1->dacl, sd2->dacl))      return false;
 612         if ((mask & SEC_DESC_SACL_PRESENT) && !security_acl_equal(sd1->sacl, sd2->sacl))      return false;
 613
 614         return true;
 615 }
 616
 617
 618 static struct security_descriptor *security_descriptor_appendv(struct security_descriptor *sd,
 619                                                                bool add_ace_to_sacl,
 620                                                                va_list ap)
 621 {
 622         const char *sidstr;
 623
 624         while ((sidstr = va_arg(ap, const char *))) {
 625                 struct dom_sid *sid;
 626                 struct security_ace *ace = talloc_zero(sd, struct security_ace);
 627                 NTSTATUS status;
 628
 629                 if (ace == NULL) {
 630                         talloc_free(sd);
 631                         return NULL;
 632                 }
 633                 ace->type = va_arg(ap, unsigned int);
 634                 ace->access_mask = va_arg(ap, unsigned int);
 635                 ace->flags = va_arg(ap, unsigned int);
 636                 sid = dom_sid_parse_talloc(ace, sidstr);
 637                 if (sid == NULL) {
 638                         talloc_free(sd);
 639                         return NULL;
 640                 }
 641                 ace->trustee = *sid;
 642                 if (add_ace_to_sacl) {
 643                         status = security_descriptor_sacl_add(sd, ace);
 644                 } else {
 645                         status = security_descriptor_dacl_add(sd, ace);
 646                 }
 647                 /* TODO: check: would talloc_free(ace) here be correct? */
 648                 if (!NT_STATUS_IS_OK(status)) {
 649                         talloc_free(sd);
 650                         return NULL;
 651                 }
 652         }
 653
 654         return sd;
 655 }
 656
 657 static struct security_descriptor *security_descriptor_createv(TALLOC_CTX *mem_ctx,
 658                                                                uint16_t sd_type,
 659                                                                const char *owner_sid,
 660                                                                const char *group_sid,
 661                                                                bool add_ace_to_sacl,
 662                                                                va_list ap)
 663 {
 664         struct security_descriptor *sd;
 665
 666         sd = security_descriptor_initialise(mem_ctx);
 667         if (sd == NULL) {
 668                 return NULL;
 669         }
 670
 671         sd->type |= sd_type;
 672
 673         if (owner_sid) {
 674                 sd->owner_sid = dom_sid_parse_talloc(sd, owner_sid);
 675                 if (sd->owner_sid == NULL) {
 676                         talloc_free(sd);
 677                         return NULL;
 678                 }
 679         }
 680         if (group_sid) {
 681                 sd->group_sid = dom_sid_parse_talloc(sd, group_sid);
 682                 if (sd->group_sid == NULL) {
 683                         talloc_free(sd);
 684                         return NULL;
 685                 }
 686         }
 687
 688         return security_descriptor_appendv(sd, add_ace_to_sacl, ap);
 689 }
 690
 691 /*
 692   create a security descriptor using string SIDs. This is used by the
 693   torture code to allow the easy creation of complex ACLs
 694   This is a varargs function. The list of DACL ACEs ends with a NULL sid.
 695
 696   Each ACE contains a set of 4 parameters:
 697   SID, ACCESS_TYPE, MASK, FLAGS
 698
 699   a typical call would be:
 700
 701     sd = security_descriptor_dacl_create(mem_ctx,
 702                                          sd_type_flags,
 703                                          mysid,
 704                                          mygroup,
 705                                          SID_NT_AUTHENTICATED_USERS,
 706                                          SEC_ACE_TYPE_ACCESS_ALLOWED,
 707                                          SEC_FILE_ALL,
 708                                          SEC_ACE_FLAG_OBJECT_INHERIT,
 709                                          NULL);
 710   that would create a sd with one DACL ACE
 711 */
 712
 713 struct security_descriptor *security_descriptor_dacl_create(TALLOC_CTX *mem_ctx,
 714                                                             uint16_t sd_type,
 715                                                             const char *owner_sid,
 716                                                             const char *group_sid,
 717                                                             ...)
 718 {
 719         struct security_descriptor *sd = NULL;
 720         va_list ap;
 721         va_start(ap, group_sid);
 722         sd = security_descriptor_createv(mem_ctx, sd_type, owner_sid,
 723                                          group_sid, false, ap);
 724         va_end(ap);
 725
 726         return sd;
 727 }
 728
 729 struct security_descriptor *security_descriptor_sacl_create(TALLOC_CTX *mem_ctx,
 730                                                             uint16_t sd_type,
 731                                                             const char *owner_sid,
 732                                                             const char *group_sid,
 733                                                             ...)
 734 {
 735         struct security_descriptor *sd = NULL;
 736         va_list ap;
 737         va_start(ap, group_sid);
 738         sd = security_descriptor_createv(mem_ctx, sd_type, owner_sid,
 739                                          group_sid, true, ap);
 740         va_end(ap);
 741
 742         return sd;
 743 }
 744
 745 struct security_ace *security_ace_create(TALLOC_CTX *mem_ctx,
 746                                          const char *sid_str,
 747                                          enum security_ace_type type,
 748                                          uint32_t access_mask,
 749                                          uint8_t flags)
 750
 751 {
 752         struct security_ace *ace;
 753         bool ok;
 754
 755         ace = talloc_zero(mem_ctx, struct security_ace);
 756         if (ace == NULL) {
 757                 return NULL;
 758         }
 759
 760         ok = dom_sid_parse(sid_str, &ace->trustee);
 761         if (!ok) {
 762                 talloc_free(ace);
 763                 return NULL;
 764         }
 765         ace->type = type;
 766         ace->access_mask = access_mask;
 767         ace->flags = flags;
 768
 769         return ace;
 770 }
 771
 772 /*******************************************************************
 773  Check for MS NFS ACEs in a sd
 774 *******************************************************************/
 775 bool security_descriptor_with_ms_nfs(const struct security_descriptor *psd)
 776 {
 777         uint32_t i;
 778
 779         if (psd->dacl == NULL) {
 780                 return false;
 781         }
 782
 783         for (i = 0; i < psd->dacl->num_aces; i++) {
 784                 if (dom_sid_compare_domain(
 785                             &global_sid_Unix_NFS,
 786                             &psd->dacl->aces[i].trustee) == 0) {
 787                         return true;
 788                 }
 789         }
 790
 791         return false;
 792 }