source3/modules/onefs_acl.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  *
   4  * Support for OneFS native NTFS ACLs
   5  *
   6  * Copyright (C) Steven Danneman, 2008
   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 "onefs.h"
  23
  24 #include <isi_acl/isi_acl_util.h>
  25 #include <ifs/ifs_syscalls.h>
  26
  27 const struct enum_list enum_onefs_acl_wire_format[] = {
  28         {ACL_FORMAT_RAW,  "No Format"},
  29         {ACL_FORMAT_WINDOWS_SD, "Format Windows SD"},
  30         {ACL_FORMAT_ALWAYS, "Always Format SD"},
  31         {-1, NULL}
  32 };
  33
  34 /**
  35  * Turn SID into UID/GID and setup a struct ifs_identity
  36  */
  37 static bool
  38 onefs_sid_to_identity(const DOM_SID *sid, struct ifs_identity *id,
  39     bool is_group)
  40 {
  41         enum ifs_identity_type type = IFS_ID_TYPE_LAST+1;
  42         uid_t uid = 0;
  43         gid_t gid = 0;
  44
  45         if (!sid || sid_equal(sid, &global_sid_NULL))
  46                 type = IFS_ID_TYPE_NULL;
  47         else if (sid_equal(sid, &global_sid_World))
  48                 type = IFS_ID_TYPE_EVERYONE;
  49         else if (sid_equal(sid, &global_sid_Creator_Owner))
  50                 type = IFS_ID_TYPE_CREATOR_OWNER;
  51         else if (sid_equal(sid, &global_sid_Creator_Group))
  52                 type = IFS_ID_TYPE_CREATOR_GROUP;
  53         else if (is_group) {
  54                 if (!sid_to_gid(sid, &gid))
  55                         return false;
  56                 type = IFS_ID_TYPE_GID;
  57         } else {
  58                 if (sid_to_uid(sid, &uid))
  59                         type = IFS_ID_TYPE_UID;
  60                 else if (sid_to_gid(sid, &gid))
  61                         type = IFS_ID_TYPE_GID;
  62                 else
  63                         return false;
  64         }
  65
  66         if (aclu_initialize_identity(id, type, uid, gid, is_group)) {
  67                 DEBUG(3, ("Call to aclu_initialize_identity failed! id=%x, "
  68                     "type=%d, uid=%u, gid=%u, is_group=%d\n",
  69                     (unsigned int)id, type, uid, gid, is_group));
  70                 return false;
  71         }
  72
  73         return true;
  74 }
  75
  76 /**
  77  * Turn struct ifs_identity into SID
  78  */
  79 static bool
  80 onefs_identity_to_sid(struct ifs_identity *id, DOM_SID *sid)
  81 {
  82         if (!id || !sid)
  83                 return false;
  84
  85         if (id->type >= IFS_ID_TYPE_LAST)
  86                 return false;
  87
  88         switch (id->type) {
  89             case IFS_ID_TYPE_UID:
  90                 uid_to_sid(sid, id->id.uid);
  91                 break;
  92             case IFS_ID_TYPE_GID:
  93                 gid_to_sid(sid, id->id.gid);
  94                 break;
  95             case IFS_ID_TYPE_EVERYONE:
  96                 sid_copy(sid, &global_sid_World);
  97                 break;
  98             case IFS_ID_TYPE_NULL:
  99                 sid_copy(sid, &global_sid_NULL);
 100                 break;
 101             case IFS_ID_TYPE_CREATOR_OWNER:
 102                 sid_copy(sid, &global_sid_Creator_Owner);
 103                 break;
 104             case IFS_ID_TYPE_CREATOR_GROUP:
 105                 sid_copy(sid, &global_sid_Creator_Group);
 106                 break;
 107             default:
 108                 DEBUG(0, ("Unknown identity type: %d\n", id->type));
 109                 return false;
 110         }
 111
 112         return true;
 113 }
 114
 115 static bool
 116 onefs_og_to_identity(DOM_SID *sid, struct ifs_identity * ident,
 117     bool is_group, int snum)
 118 {
 119         const DOM_SID *b_admin_sid = &global_sid_Builtin_Administrators;
 120
 121         if (!onefs_sid_to_identity(sid, ident, is_group)) {
 122                 if (!lp_parm_bool(snum, PARM_ONEFS_TYPE,
 123                      PARM_UNMAPPABLE_SIDS_IGNORE,
 124                      PARM_UNMAPPABLE_SIDS_IGNORE_DEFAULT)) {
 125                         DEBUG(3, ("Unresolvable SID (%s) found.\n",
 126                                 sid_string_dbg(sid)));
 127                         return false;
 128                 }
 129                 if (!onefs_sid_to_identity(b_admin_sid, ident, is_group)) {
 130                         return false;
 131                 }
 132                 DEBUG(3, ("Mapping unresolvable owner SID (%s) to Builtin "
 133                         "Administrators group.\n",
 134                         sid_string_dbg(sid)));
 135         }
 136         return true;
 137 }
 138
 139 static bool
 140 sid_in_ignore_list(DOM_SID * sid, int snum)
 141 {
 142         const char ** sid_list = NULL;
 143         DOM_SID match;
 144
 145         sid_list = lp_parm_string_list(snum, PARM_ONEFS_TYPE,
 146             PARM_UNMAPPABLE_SIDS_IGNORE_LIST,
 147             PARM_UNMAPPABLE_SIDS_IGNORE_LIST_DEFAULT);
 148
 149         /* Fast path a NULL list */
 150         if (!sid_list || *sid_list == NULL)
 151                 return false;
 152
 153         while (*sid_list) {
 154                 if (string_to_sid(&match, *sid_list))
 155                         if (sid_equal(sid, &match))
 156                                 return true;
 157                 sid_list++;
 158         }
 159
 160         return false;
 161 }
 162
 163 /**
 164  * Convert a trustee to a struct identity
 165  */
 166 static bool
 167 onefs_samba_ace_to_ace(SEC_ACE * samba_ace, struct ifs_ace * ace,
 168     bool *mapped, int snum)
 169 {
 170         struct ifs_identity ident = {.type=IFS_ID_TYPE_LAST, .id.uid=0};
 171
 172         SMB_ASSERT(ace);
 173         SMB_ASSERT(mapped);
 174         SMB_ASSERT(samba_ace);
 175
 176         if (onefs_sid_to_identity(&samba_ace->trustee, &ident, false)) {
 177                 *mapped = true;
 178         } else {
 179
 180                 SMB_ASSERT(ident.id.uid >= 0);
 181
 182                 /* Ignore the sid if it's in the list */
 183                 if (sid_in_ignore_list(&samba_ace->trustee, snum)) {
 184                         DEBUG(3, ("Silently failing to set ACE for SID (%s) "
 185                                 "because it is in the ignore sids list\n",
 186                                 sid_string_dbg(&samba_ace->trustee)));
 187                         *mapped = false;
 188                 } else if ((samba_ace->type == SEC_ACE_TYPE_ACCESS_DENIED) &&
 189                     lp_parm_bool(snum, PARM_ONEFS_TYPE,
 190                     PARM_UNMAPPABLE_SIDS_DENY_EVERYONE,
 191                     PARM_UNMAPPABLE_SIDS_DENY_EVERYONE_DEFAULT)) {
 192                         /* If the ace is deny translated to Everyone */
 193                         DEBUG(3, ("Mapping unresolvable deny ACE SID (%s) "
 194                                 "to Everyone.\n",
 195                                 sid_string_dbg(&samba_ace->trustee)));
 196                         if (aclu_initialize_identity(&ident,
 197                                 IFS_ID_TYPE_EVERYONE, 0, 0, False) != 0) {
 198                                 DEBUG(2, ("aclu_initialize_identity() "
 199                                         "failed making Everyone\n"));
 200                                 return false;
 201                         }
 202                         *mapped = true;
 203                 } else if (lp_parm_bool(snum, PARM_ONEFS_TYPE,
 204                            PARM_UNMAPPABLE_SIDS_IGNORE,
 205                            PARM_UNMAPPABLE_SIDS_IGNORE_DEFAULT)) {
 206                         DEBUG(3, ("Silently failing to set ACE for SID (%s) "
 207                                 "because it is unresolvable\n",
 208                                 sid_string_dbg(&samba_ace->trustee)));
 209                         *mapped = false;
 210                 } else {
 211                         /* Fail for lack of a better option */
 212                         return false;
 213                 }
 214         }
 215
 216         if (*mapped) {
 217                 if (aclu_initialize_ace(ace, samba_ace->type,
 218                         samba_ace->access_mask, samba_ace->flags, 0,
 219                         &ident))
 220                         return false;
 221
 222                 if ((ace->trustee.type == IFS_ID_TYPE_CREATOR_OWNER ||
 223                         ace->trustee.type == IFS_ID_TYPE_CREATOR_GROUP) &&
 224                     nt4_compatible_acls())
 225                         ace->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
 226         }
 227
 228         return true;
 229 }
 230
 231 /**
 232  * Convert a SEC_ACL to a struct ifs_security_acl
 233  */
 234 static bool
 235 onefs_samba_acl_to_acl(SEC_ACL *samba_acl, struct ifs_security_acl **acl,
 236     bool * ignore_aces, int snum)
 237 {
 238         int num_aces = 0;
 239         struct ifs_ace *aces = NULL;
 240         SEC_ACE *samba_aces;
 241         bool mapped;
 242         int i, j;
 243
 244         SMB_ASSERT(ignore_aces);
 245
 246         if ((!acl) || (!samba_acl))
 247                 return false;
 248
 249         samba_aces = samba_acl->aces;
 250
 251         if (samba_acl->num_aces > 0 && samba_aces) {
 252                 /* Setup ACES */
 253                 num_aces = samba_acl->num_aces;
 254                 aces = SMB_MALLOC_ARRAY(struct ifs_ace, num_aces);
 255
 256                 for (i = 0, j = 0; j < num_aces; i++, j++) {
 257                         if (!onefs_samba_ace_to_ace(&samba_aces[j],
 258                                 &aces[i], &mapped, snum))
 259                                 goto err_free;
 260
 261                         if (!mapped)
 262                                 i--;
 263                 }
 264                 num_aces = i;
 265         }
 266
 267         /* If aces are given but we cannot apply them due to the reasons
 268          * above we do not change the SD.  However, if we are told to
 269          * explicitly set an SD with 0 aces we honor this operation */
 270         *ignore_aces = samba_acl->num_aces > 0 && num_aces < 1;
 271
 272         if (*ignore_aces == false)
 273                 if (aclu_initialize_acl(acl, aces, num_aces))
 274                         goto err_free;
 275
 276         if (aclu_initialize_acl(acl, aces, num_aces))
 277                 goto err_free;
 278
 279         /* Currently aclu_initialize_acl should copy the aces over, allowing
 280          * us to immediately free */
 281         free(aces);
 282         return true;
 283
 284 err_free:
 285         free(aces);
 286         return false;
 287 }
 288
 289 /**
 290  * Convert a struct ifs_security_acl to a SEC_ACL
 291  */
 292 static bool
 293 onefs_acl_to_samba_acl(struct ifs_security_acl *acl, SEC_ACL **samba_acl)
 294 {
 295         SEC_ACE *samba_aces = NULL;
 296         SEC_ACL *tmp_samba_acl = NULL;
 297         int i, num_aces = 0;
 298
 299         if (!samba_acl)
 300                 return false;
 301
 302         /* NULL ACL */
 303         if (!acl) {
 304                 *samba_acl = NULL;
 305                 return true;
 306         }
 307
 308         /* Determine number of aces in ACL */
 309         if (!acl->aces)
 310                 num_aces = 0;
 311         else
 312                 num_aces = acl->num_aces;
 313
 314         /* Allocate the ace list. */
 315         if (num_aces > 0) {
 316                 if ((samba_aces = SMB_MALLOC_ARRAY(SEC_ACE, num_aces)) == NULL)
 317                 {
 318                         DEBUG(0, ("Unable to malloc space for %d aces.\n",
 319                             num_aces));
 320                         return false;
 321                 }
 322                 memset(samba_aces, '\0', (num_aces) * sizeof(SEC_ACE));
 323         }
 324
 325         for (i = 0; i < num_aces; i++) {
 326                 DOM_SID sid;
 327
 328                 if (!onefs_identity_to_sid(&acl->aces[i].trustee, &sid))
 329                         goto err_free;
 330
 331                 init_sec_ace(&samba_aces[i], &sid, acl->aces[i].type,
 332                     acl->aces[i].access_mask, acl->aces[i].flags);
 333         }
 334
 335         if ((tmp_samba_acl = make_sec_acl(talloc_tos(), acl->revision, num_aces,
 336             samba_aces)) == NULL) {
 337                DEBUG(0, ("Unable to malloc space for acl.\n"));
 338                goto err_free;
 339         }
 340
 341         *samba_acl = tmp_samba_acl;
 342         SAFE_FREE(samba_aces);
 343         return true;
 344 err_free:
 345         SAFE_FREE(samba_aces);
 346         return false;
 347 }
 348
 349 /**
 350  * @brief Reorder ACLs into the "correct" order for Windows Explorer.
 351  *
 352  * Windows Explorer expects ACLs to be in a standard order (inherited first,
 353  * then deny, then permit.)  When ACLs are composed from POSIX file permissions
 354  * bits, they may not match these expectations, generating an annoying warning
 355  * dialog for the user.  This function will, if configured appropriately,
 356  * reorder the ACLs for these "synthetic" (POSIX-derived) descriptors to prevent
 357  * this.  The list is changed within the security descriptor passed in.
 358  *
 359  * @param fsp files_struct with service configs; must not be NULL
 360  * @param sd security descriptor being normalized;
 361  *           sd->dacl->aces is rewritten in-place, so must not be NULL
 362  * @return true on success, errno will be set on error
 363  *
 364  * @bug Although Windows Explorer likes the reordering, they seem to cause
 365  *  problems with Excel and Word sending back the reordered ACLs to us and
 366  *  changing policy; see Isilon bug 30165.
 367  */
 368 static bool
 369 onefs_canon_acl(files_struct *fsp, struct ifs_security_descriptor *sd)
 370 {
 371         int error = 0;
 372         int cur;
 373         struct ifs_ace *new_aces = NULL;
 374         int new_aces_count = 0;
 375         SMB_STRUCT_STAT sbuf;
 376
 377         if (sd == NULL || sd->dacl == NULL || sd->dacl->num_aces == 0)
 378                 return true;
 379
 380         /*
 381          * Find out if this is a windows bit, and if the smb policy wants us to
 382          * lie about the sd.
 383          */
 384         SMB_ASSERT(fsp != NULL);
 385         switch (lp_parm_enum(SNUM(fsp->conn), PARM_ONEFS_TYPE,
 386                 PARM_ACL_WIRE_FORMAT, enum_onefs_acl_wire_format,
 387                 PARM_ACL_WIRE_FORMAT_DEFAULT))  {
 388         case ACL_FORMAT_RAW:
 389                 return true;
 390
 391         case ACL_FORMAT_WINDOWS_SD:
 392                 error = SMB_VFS_FSTAT(fsp, &sbuf);
 393                 if (error)
 394                         return false;
 395
 396                 if ((sbuf.st_flags & SF_HASNTFSACL) != 0) {
 397                         DEBUG(10, ("Did not canonicalize ACLs because a "
 398                             "Windows ACL set was found for file %s\n",
 399                             fsp->fsp_name));
 400                         return true;
 401                 }
 402                 break;
 403
 404         case ACL_FORMAT_ALWAYS:
 405                 break;
 406
 407         default:
 408                 SMB_ASSERT(false);
 409                 return false;
 410         }
 411
 412         new_aces = SMB_MALLOC_ARRAY(struct ifs_ace, sd->dacl->num_aces);
 413         if (new_aces == NULL)
 414                 return false;
 415
 416         /*
 417          * By walking down the list 3 separate times, we can avoid the need
 418          * to create multiple temp buffers and extra copies.
 419          */
 420         for (cur = 0; cur < sd->dacl->num_aces; cur++)  {
 421                 if (sd->dacl->aces[cur].flags & IFS_ACE_FLAG_INHERITED_ACE)
 422                         new_aces[new_aces_count++] = sd->dacl->aces[cur];
 423         }
 424
 425         for (cur = 0; cur < sd->dacl->num_aces; cur++)  {
 426                 if (!(sd->dacl->aces[cur].flags & IFS_ACE_FLAG_INHERITED_ACE) &&
 427                     (sd->dacl->aces[cur].type == IFS_ACE_TYPE_ACCESS_DENIED))
 428                         new_aces[new_aces_count++] = sd->dacl->aces[cur];
 429         }
 430
 431         for (cur = 0; cur < sd->dacl->num_aces; cur++)  {
 432                 if (!(sd->dacl->aces[cur].flags & IFS_ACE_FLAG_INHERITED_ACE) &&
 433                     !(sd->dacl->aces[cur].type == IFS_ACE_TYPE_ACCESS_DENIED))
 434                         new_aces[new_aces_count++] = sd->dacl->aces[cur];
 435         }
 436
 437         SMB_ASSERT(new_aces_count == sd->dacl->num_aces);
 438         DEBUG(10, ("Performed canonicalization of ACLs for file %s\n",
 439             fsp->fsp_name));
 440
 441         /*
 442          * At this point you would think we could just do this:
 443          *   SAFE_FREE(sd->dacl->aces);
 444          *   sd->dacl->aces = new_aces;
 445          * However, in some cases the existing aces pointer does not point
 446          * to the beginning of an allocated block.  So we have to do a more
 447          * expensive memcpy()
 448          */
 449         memcpy(sd->dacl->aces, new_aces,
 450             sizeof(struct ifs_ace) * new_aces_count);
 451
 452         SAFE_FREE(new_aces);
 453         return true;
 454 }
 455
 456
 457 /**
 458  * This enum is a helper for onefs_fget_nt_acl() to communicate with
 459  * onefs_init_ace().
 460  */
 461 enum mode_ident { USR, GRP, OTH };
 462
 463 /**
 464  * Initializes an ACE for addition to a synthetic ACL.
 465  */
 466 static struct ifs_ace onefs_init_ace(struct connection_struct *conn,
 467                                      mode_t mode,
 468                                      bool isdir,
 469                                      enum mode_ident ident)
 470 {
 471         struct ifs_ace result;
 472         enum ifs_ace_rights r,w,x;
 473
 474         r = isdir ? UNIX_DIRECTORY_ACCESS_R : UNIX_ACCESS_R;
 475         w = isdir ? UNIX_DIRECTORY_ACCESS_W : UNIX_ACCESS_W;
 476         x = isdir ? UNIX_DIRECTORY_ACCESS_X : UNIX_ACCESS_X;
 477
 478         result.type = IFS_ACE_TYPE_ACCESS_ALLOWED;
 479         result.ifs_flags = 0;
 480         result.flags = isdir ? IFS_ACE_FLAG_CONTAINER_INHERIT :
 481             IFS_ACE_FLAG_OBJECT_INHERIT;
 482         result.flags |= IFS_ACE_FLAG_INHERIT_ONLY;
 483
 484         switch (ident) {
 485         case USR:
 486                 result.access_mask =
 487                     ((mode & S_IRUSR) ? r : 0 ) |
 488                     ((mode & S_IWUSR) ? w : 0 ) |
 489                     ((mode & S_IXUSR) ? x : 0 );
 490                 if (lp_parm_bool(SNUM(conn), PARM_ONEFS_TYPE,
 491                     PARM_CREATOR_OWNER_GETS_FULL_CONTROL,
 492                     PARM_CREATOR_OWNER_GETS_FULL_CONTROL_DEFAULT))
 493                         result.access_mask |= GENERIC_ALL_ACCESS;
 494                 result.trustee.type = IFS_ID_TYPE_CREATOR_OWNER;
 495                 break;
 496         case GRP:
 497                 result.access_mask =
 498                     ((mode & S_IRGRP) ? r : 0 ) |
 499                     ((mode & S_IWGRP) ? w : 0 ) |
 500                     ((mode & S_IXGRP) ? x : 0 );
 501                 result.trustee.type = IFS_ID_TYPE_CREATOR_GROUP;
 502                 break;
 503         case OTH:
 504                 result.access_mask =
 505                     ((mode & S_IROTH) ? r : 0 ) |
 506                     ((mode & S_IWOTH) ? w : 0 ) |
 507                     ((mode & S_IXOTH) ? x : 0 );
 508                 result.trustee.type = IFS_ID_TYPE_EVERYONE;
 509                 break;
 510         }
 511
 512         return result;
 513 }
 514
 515 /**
 516  * This adds inheritable ACEs to the end of the DACL, with the ACEs
 517  * being derived from the mode bits.  This is useful for clients that have the
 518  * MoveSecurityAttributes regkey set to 0 or are in Simple File Sharing Mode.
 519  *
 520  * On these clients, when copying files from one folder to another inside the
 521  * same volume/share, the DACL is explicitely cleared.  Without inheritable
 522  * aces on the target folder the mode bits of the copied file are set to 000.
 523  *
 524  * See Isilon Bug 27990
 525  *
 526  * Note: This function allocates additional memory onto sd->dacl->aces, that
 527  * must be freed by the caller.
 528  */
 529 static bool add_sfs_aces(files_struct *fsp, struct ifs_security_descriptor *sd)
 530 {
 531         int error;
 532         SMB_STRUCT_STAT sbuf;
 533
 534         error = SMB_VFS_FSTAT(fsp, &sbuf);
 535         if (error) {
 536                 DEBUG(0, ("Failed to stat %s in simple files sharing "
 537                           "compatibility mode. errno=%d\n",
 538                           fsp->fsp_name, errno));
 539                 return false;
 540         }
 541
 542         /* Only continue if this is a synthetic ACL and a directory. */
 543         if (S_ISDIR(sbuf.st_mode) && (sbuf.st_flags & SF_HASNTFSACL) == 0) {
 544                 struct ifs_ace new_aces[6];
 545                 struct ifs_ace *old_aces;
 546                 int i, num_aces_to_add = 0;
 547                 mode_t file_mode = 0, dir_mode = 0;
 548
 549                 /* Use existing samba logic to derive the mode bits. */
 550                 file_mode = unix_mode(fsp->conn, 0, fsp->fsp_name, false);
 551                 dir_mode = unix_mode(fsp->conn, aDIR, fsp->fsp_name, false);
 552
 553                 /* Initialize ACEs. */
 554                 new_aces[0] = onefs_init_ace(fsp->conn, file_mode, false, USR);
 555                 new_aces[1] = onefs_init_ace(fsp->conn, file_mode, false, GRP);
 556                 new_aces[2] = onefs_init_ace(fsp->conn, file_mode, false, OTH);
 557                 new_aces[3] = onefs_init_ace(fsp->conn, dir_mode, true, USR);
 558                 new_aces[4] = onefs_init_ace(fsp->conn, dir_mode, true, GRP);
 559                 new_aces[5] = onefs_init_ace(fsp->conn, dir_mode, true, OTH);
 560
 561                 for (i = 0; i < 6; i++)
 562                         if (new_aces[i].access_mask != 0)
 563                                 num_aces_to_add++;
 564
 565                 /* Expand the ACEs array */
 566                 if (num_aces_to_add != 0) {
 567                         old_aces = sd->dacl->aces;
 568
 569                         sd->dacl->aces = SMB_MALLOC_ARRAY(struct ifs_ace,
 570                             sd->dacl->num_aces + num_aces_to_add);
 571                         if (!sd->dacl->aces) {
 572                                 DEBUG(0, ("Unable to malloc space for "
 573                                     "new_aces: %d.\n",
 574                                      sd->dacl->num_aces + num_aces_to_add));
 575                                 return false;
 576                         }
 577                         memcpy(sd->dacl->aces, old_aces,
 578                             sizeof(struct ifs_ace) * sd->dacl->num_aces);
 579
 580                         /* Add the new ACEs to the DACL. */
 581                         for (i = 0; i < 6; i++) {
 582                                 if (new_aces[i].access_mask != 0) {
 583                                         sd->dacl->aces[sd->dacl->num_aces] =
 584                                             new_aces[i];
 585                                         sd->dacl->num_aces++;
 586                                 }
 587                         }
 588                 }
 589         }
 590         return true;
 591 }
 592
 593 /**
 594  * Isilon-specific function for getting an NTFS ACL from an open file.
 595  *
 596  * @param[out] ppdesc SecDesc to allocate and fill in
 597  *
 598  * @return NTSTATUS based off errno on error
 599  */
 600 NTSTATUS
 601 onefs_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 602                   uint32 security_info, SEC_DESC **ppdesc)
 603 {
 604         int error;
 605         uint32_t sd_size = 0;
 606         size_t size = 0;
 607         struct ifs_security_descriptor *sd = NULL;
 608         DOM_SID owner_sid, group_sid;
 609         DOM_SID *ownerp, *groupp;
 610         SEC_ACL *dacl, *sacl;
 611         SEC_DESC *pdesc;
 612         bool alloced = false;
 613         bool new_aces_alloced = false;
 614         bool fopened = false;
 615         NTSTATUS status = NT_STATUS_OK;
 616
 617         *ppdesc = NULL;
 618
 619         DEBUG(5, ("Getting sd for file %s. security_info=%u\n",
 620             fsp->fsp_name, security_info));
 621
 622         if (lp_parm_bool(SNUM(fsp->conn), PARM_ONEFS_TYPE,
 623                 PARM_IGNORE_SACLS, PARM_IGNORE_SACLS_DEFAULT)) {
 624                 DEBUG(5, ("Ignoring SACL on %s.\n", fsp->fsp_name));
 625                 security_info &= ~SACL_SECURITY_INFORMATION;
 626         }
 627
 628         if (fsp->fh->fd == -1) {
 629                 if ((fsp->fh->fd = onefs_sys_create_file(handle->conn,
 630                                                          -1,
 631                                                          fsp->fsp_name,
 632                                                          0,
 633                                                          0,
 634                                                          0,
 635                                                          0,
 636                                                          0,
 637                                                          0,
 638                                                          INTERNAL_OPEN_ONLY,
 639                                                          0,
 640                                                          NULL,
 641                                                          0,
 642                                                          NULL)) == -1) {
 643                         DEBUG(0, ("Error opening file %s. errno=%d (%s)\n",
 644                                   fsp->fsp_name, errno, strerror(errno)));
 645                         status = map_nt_error_from_unix(errno);
 646                         goto out;
 647                 }
 648                 fopened = true;
 649         }
 650
 651         /* Get security descriptor */
 652         sd_size = 0;
 653         do {
 654                 /* Allocate memory for get_security_descriptor */
 655                 if (sd_size > 0) {
 656                         sd = SMB_REALLOC(sd, sd_size);
 657                         if (!sd) {
 658                                 DEBUG(0, ("Unable to malloc %u bytes of space "
 659                                     "for security descriptor.\n", sd_size));
 660                                 status = map_nt_error_from_unix(errno);
 661                                 goto out;
 662                         }
 663
 664                         alloced = true;
 665                 }
 666
 667                 error = ifs_get_security_descriptor(fsp->fh->fd, security_info,
 668                     sd_size, &sd_size, sd);
 669                 if (error && (errno != EMSGSIZE)) {
 670                         DEBUG(0, ("Failed getting size of security descriptor! "
 671                             "errno=%d\n", errno));
 672                         status = map_nt_error_from_unix(errno);
 673                         goto out;
 674                 }
 675         } while (error);
 676
 677         DEBUG(5, ("Got sd, size=%u:\n", sd_size));
 678
 679         if (lp_parm_bool(SNUM(fsp->conn),
 680             PARM_ONEFS_TYPE,
 681             PARM_SIMPLE_FILE_SHARING_COMPATIBILITY_MODE,
 682             PARM_SIMPLE_FILE_SHARING_COMPATIBILITY_MODE_DEFAULT) &&
 683             sd->dacl) {
 684                 if(!(new_aces_alloced = add_sfs_aces(fsp, sd)))
 685                         goto out;
 686         }
 687
 688         if (!(onefs_canon_acl(fsp, sd))) {
 689                 status = map_nt_error_from_unix(errno);
 690                 goto out;
 691         }
 692
 693         DEBUG(5, ("Finished canonicalizing ACL\n"));
 694
 695         ownerp = NULL;
 696         groupp = NULL;
 697         dacl = NULL;
 698         sacl = NULL;
 699
 700         /* Copy owner into ppdesc */
 701         if (security_info & OWNER_SECURITY_INFORMATION) {
 702                 if (!onefs_identity_to_sid(sd->owner, &owner_sid)) {
 703                         status = NT_STATUS_INVALID_PARAMETER;
 704                         goto out;
 705                 }
 706
 707                 ownerp = &owner_sid;
 708         }
 709
 710         /* Copy group into ppdesc */
 711         if (security_info & GROUP_SECURITY_INFORMATION) {
 712                 if (!onefs_identity_to_sid(sd->group, &group_sid)) {
 713                         status = NT_STATUS_INVALID_PARAMETER;
 714                         goto out;
 715                 }
 716
 717                 groupp = &group_sid;
 718         }
 719
 720         /* Copy DACL into ppdesc */
 721         if (security_info & DACL_SECURITY_INFORMATION) {
 722                 if (!onefs_acl_to_samba_acl(sd->dacl, &dacl)) {
 723                         status = NT_STATUS_INVALID_PARAMETER;
 724                         goto out;
 725                 }
 726         }
 727
 728         /* Copy SACL into ppdesc */
 729         if (security_info & SACL_SECURITY_INFORMATION) {
 730                 if (!onefs_acl_to_samba_acl(sd->sacl, &sacl)) {
 731                         status = NT_STATUS_INVALID_PARAMETER;
 732                         goto out;
 733                 }
 734         }
 735
 736         /* AUTO_INHERIT_REQ bits are not returned over the wire so strip them
 737          * off.  Eventually we should stop storing these in the kernel
 738          * all together. See Isilon bug 40364 */
 739         sd->control &= ~(IFS_SD_CTRL_DACL_AUTO_INHERIT_REQ |
 740                          IFS_SD_CTRL_SACL_AUTO_INHERIT_REQ);
 741
 742         pdesc = make_sec_desc(talloc_tos(), sd->revision, sd->control,
 743             ownerp, groupp, sacl, dacl, &size);
 744
 745         if (!pdesc) {
 746                 DEBUG(0, ("Problem with make_sec_desc. Memory?\n"));
 747                 status = map_nt_error_from_unix(errno);
 748                 goto out;
 749         }
 750
 751         *ppdesc = pdesc;
 752
 753         DEBUG(5, ("Finished retrieving/canonicalizing SD!\n"));
 754         /* FALLTHROUGH */
 755 out:
 756         if (alloced && sd) {
 757                 if (new_aces_alloced && sd->dacl->aces)
 758                         SAFE_FREE(sd->dacl->aces);
 759
 760                 SAFE_FREE(sd);
 761         }
 762
 763         if (fopened) {
 764                 close(fsp->fh->fd);
 765                 fsp->fh->fd = -1;
 766         }
 767
 768         return status;
 769 }
 770
 771 /**
 772  * Isilon-specific function for getting an NTFS ACL from a file path.
 773  *
 774  * Since onefs_fget_nt_acl() needs to open a filepath if the fd is invalid,
 775  * we just mock up a files_struct with the path and bad fd and call into it.
 776  *
 777  * @param[out] ppdesc SecDesc to allocate and fill in
 778  *
 779  * @return NTSTATUS based off errno on error
 780  */
 781 NTSTATUS
 782 onefs_get_nt_acl(vfs_handle_struct *handle, const char* name,
 783                  uint32 security_info, SEC_DESC **ppdesc)
 784 {
 785         files_struct finfo;
 786         struct fd_handle fh;
 787
 788         ZERO_STRUCT(finfo);
 789         ZERO_STRUCT(fh);
 790
 791         finfo.fnum = -1;
 792         finfo.conn = handle->conn;
 793         finfo.fh = &fh;
 794         finfo.fh->fd = -1;
 795         finfo.fsp_name = CONST_DISCARD(char *, name);
 796
 797         return onefs_fget_nt_acl(handle, &finfo, security_info, ppdesc);
 798 }
 799
 800 /**
 801  * Isilon-specific function for setting up an ifs_security_descriptor, given a
 802  * samba SEC_DESC.
 803  *
 804  * @param[out] sd ifs_security_descriptor to fill in
 805  *
 806  * @return NTSTATUS_OK if successful
 807  */
 808 NTSTATUS onefs_samba_sd_to_sd(uint32 security_info_sent, SEC_DESC *psd,
 809                               struct ifs_security_descriptor *sd, int snum)
 810 {
 811         struct ifs_security_acl *daclp, *saclp;
 812         struct ifs_identity owner, group, *ownerp, *groupp;
 813         bool ignore_aces;
 814
 815         ownerp = NULL;
 816         groupp = NULL;
 817         daclp = NULL;
 818         saclp = NULL;
 819
 820         /* Setup owner */
 821         if (security_info_sent & OWNER_SECURITY_INFORMATION) {
 822                 if (!onefs_og_to_identity(psd->owner_sid, &owner, false, snum))
 823                         return NT_STATUS_UNSUCCESSFUL;
 824
 825                 SMB_ASSERT(owner.id.uid >= 0);
 826
 827                 ownerp = &owner;
 828         }
 829
 830         /* Setup group */
 831         if (security_info_sent & GROUP_SECURITY_INFORMATION) {
 832                 if (!onefs_og_to_identity(psd->group_sid, &group, true, snum))
 833                         return NT_STATUS_UNSUCCESSFUL;
 834
 835                 SMB_ASSERT(group.id.gid >= 0);
 836
 837                 groupp = &group;
 838         }
 839
 840         /* Setup DACL */
 841         if ((security_info_sent & DACL_SECURITY_INFORMATION) && (psd->dacl)) {
 842                 if (!onefs_samba_acl_to_acl(psd->dacl, &daclp, &ignore_aces,
 843                         snum))
 844                         return NT_STATUS_UNSUCCESSFUL;
 845
 846                 if (ignore_aces == true)
 847                         security_info_sent &= ~DACL_SECURITY_INFORMATION;
 848         }
 849
 850         /* Setup SACL */
 851         if (security_info_sent & SACL_SECURITY_INFORMATION) {
 852
 853                 if (lp_parm_bool(snum, PARM_ONEFS_TYPE,
 854                             PARM_IGNORE_SACLS, PARM_IGNORE_SACLS_DEFAULT)) {
 855                         DEBUG(5, ("Ignoring SACLs.\n"));
 856                         security_info_sent &= ~SACL_SECURITY_INFORMATION;
 857                 } else {
 858                         if (psd->sacl) {
 859                                 if (!onefs_samba_acl_to_acl(psd->sacl,
 860                                         &saclp, &ignore_aces, snum))
 861                                         return NT_STATUS_UNSUCCESSFUL;
 862
 863                                 if (ignore_aces == true) {
 864                                         security_info_sent &=
 865                                             ~SACL_SECURITY_INFORMATION;
 866                                 }
 867                         }
 868                 }
 869         }
 870
 871         /* Setup ifs_security_descriptor */
 872         DEBUG(5,("Setting up SD\n"));
 873         if (aclu_initialize_sd(sd, psd->type, ownerp, groupp,
 874                 (daclp ? &daclp : NULL), (saclp ? &saclp : NULL), false))
 875                 return NT_STATUS_UNSUCCESSFUL;
 876
 877         return NT_STATUS_OK;
 878 }
 879
 880 /**
 881  * Isilon-specific function for setting an NTFS ACL on an open file.
 882  *
 883  * @return NT_STATUS_UNSUCCESSFUL for userspace errors, NTSTATUS based off
 884  * errno on syscall errors
 885  */
 886 NTSTATUS
 887 onefs_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
 888                   uint32 security_info_sent, SEC_DESC *psd)
 889 {
 890         struct ifs_security_descriptor sd = {};
 891         int fd;
 892         bool fopened = false;
 893         NTSTATUS status;
 894
 895         DEBUG(5,("Setting SD on file %s.\n", fsp->fsp_name ));
 896
 897         status = onefs_samba_sd_to_sd(security_info_sent, psd, &sd,
 898                                       SNUM(handle->conn));
 899
 900         if (!NT_STATUS_IS_OK(status)) {
 901                 DEBUG(3, ("SD initialization failure: %s", nt_errstr(status)));
 902                 return status;
 903         }
 904
 905         fd = fsp->fh->fd;
 906         if (fd == -1) {
 907                 if ((fd = onefs_sys_create_file(handle->conn,
 908                                                 -1,
 909                                                 fsp->fsp_name,
 910                                                 0,
 911                                                 0,
 912                                                 0,
 913                                                 0,
 914                                                 0,
 915                                                 0,
 916                                                 INTERNAL_OPEN_ONLY,
 917                                                 0,
 918                                                 NULL,
 919                                                 0,
 920                                                 NULL)) == -1) {
 921                         DEBUG(0, ("Error opening file %s. errno=%d (%s)\n",
 922                                   fsp->fsp_name, errno, strerror(errno)));
 923                         status = map_nt_error_from_unix(errno);
 924                         goto out;
 925                 }
 926                 fopened = true;
 927         }
 928
 929         errno = 0;
 930         if (ifs_set_security_descriptor(fd, security_info_sent, &sd)) {
 931                 DEBUG(0, ("Error setting security descriptor = %d\n", errno));
 932                 status = map_nt_error_from_unix(errno);
 933                 goto out;
 934         }
 935
 936         DEBUG(5, ("Security descriptor set correctly!\n"));
 937         status = NT_STATUS_OK;
 938
 939         /* FALLTHROUGH */
 940 out:
 941         if (fopened)
 942                 close(fd);
 943
 944         aclu_free_sd(&sd, false);
 945         return status;
 946 }