source/modules/vfs_acl_tdb.c

   1 /*
   2  * Store Windows ACLs in a tdb.
   3  *
   4  * Copyright (C) Volker Lendecke, 2008
   5  * Copyright (C) Jeremy Allison, 2008
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 /* NOTE: This is an experimental module, not yet finished. JRA. */
  22
  23 #include "includes.h"
  24 #include "librpc/gen_ndr/xattr.h"
  25 #include "librpc/gen_ndr/ndr_xattr.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_VFS
  29
  30 static unsigned int ref_count;
  31 static struct db_context *acl_db;
  32
  33 /*******************************************************************
  34  Open acl_db if not already open, increment ref count.
  35 *******************************************************************/
  36
  37 static bool acl_tdb_init(struct db_context **pp_db)
  38 {
  39         const char *dbname;
  40
  41         if (acl_db) {
  42                 *pp_db = acl_db;
  43                 ref_count++;
  44                 return true;
  45         }
  46
  47         dbname = lock_path("file_ntacls.tdb");
  48
  49         if (dbname == NULL) {
  50                 errno = ENOSYS;
  51                 return false;
  52         }
  53
  54         become_root();
  55         *pp_db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
  56         unbecome_root();
  57
  58         if (*pp_db == NULL) {
  59 #if defined(ENOTSUP)
  60                 errno = ENOTSUP;
  61 #else
  62                 errno = ENOSYS;
  63 #endif
  64                 return false;
  65         }
  66
  67         ref_count++;
  68         return true;
  69 }
  70
  71 /*******************************************************************
  72  Lower ref count and close acl_db if zero.
  73 *******************************************************************/
  74
  75 static void free_acl_tdb_data(void **pptr)
  76 {
  77         struct db_context **pp_db = (struct db_context **)pptr;
  78
  79         ref_count--;
  80         if (ref_count == 0) {
  81                 TALLOC_FREE(*pp_db);
  82                 acl_db = NULL;
  83         }
  84 }
  85
  86 /*******************************************************************
  87  Fetch_lock the tdb acl record for a file
  88 *******************************************************************/
  89
  90 static struct db_record *acl_tdb_lock(TALLOC_CTX *mem_ctx,
  91                                         struct db_context *db,
  92                                         const struct file_id *id)
  93 {
  94         uint8 id_buf[16];
  95         push_file_id_16((char *)id_buf, id);
  96         return db->fetch_locked(db,
  97                                 mem_ctx,
  98                                 make_tdb_data(id_buf,
  99                                         sizeof(id_buf)));
 100 }
 101
 102 /*******************************************************************
 103  Delete the tdb acl record for a file
 104 *******************************************************************/
 105
 106 static NTSTATUS acl_tdb_delete(vfs_handle_struct *handle,
 107                                 struct db_context *db,
 108                                 SMB_STRUCT_STAT *psbuf)
 109 {
 110         NTSTATUS status;
 111         struct file_id id = vfs_file_id_from_sbuf(handle->conn, psbuf);
 112         struct db_record *rec = acl_tdb_lock(talloc_tos(), db, &id);
 113
 114         /*
 115          * If rec == NULL there's not much we can do about it
 116          */
 117
 118         if (rec == NULL) {
 119                 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
 120                 TALLOC_FREE(rec);
 121                 return NT_STATUS_OK;
 122         }
 123
 124         status = rec->delete_rec(rec);
 125         TALLOC_FREE(rec);
 126         return status;
 127 }
 128
 129 /*******************************************************************
 130  Parse out a struct security_descriptor from a DATA_BLOB.
 131 *******************************************************************/
 132
 133 static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob,
 134                                 uint32 security_info,
 135                                 struct security_descriptor **ppdesc)
 136 {
 137         TALLOC_CTX *ctx = talloc_tos();
 138         struct xattr_NTACL xacl;
 139         enum ndr_err_code ndr_err;
 140         size_t sd_size;
 141
 142         ndr_err = ndr_pull_struct_blob(pblob, ctx, &xacl,
 143                         (ndr_pull_flags_fn_t)ndr_pull_xattr_NTACL);
 144
 145         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 146                 DEBUG(5, ("parse_acl_blob: ndr_pull_xattr_NTACL failed: %s\n",
 147                         ndr_errstr(ndr_err)));
 148                 return ndr_map_error2ntstatus(ndr_err);;
 149         }
 150
 151         if (xacl.version != 2) {
 152                 return NT_STATUS_REVISION_MISMATCH;
 153         }
 154
 155         *ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, xacl.info.sd_hs->sd->type | SEC_DESC_SELF_RELATIVE,
 156                         (security_info & OWNER_SECURITY_INFORMATION)
 157                         ? xacl.info.sd_hs->sd->owner_sid : NULL,
 158                         (security_info & GROUP_SECURITY_INFORMATION)
 159                         ? xacl.info.sd_hs->sd->group_sid : NULL,
 160                         (security_info & SACL_SECURITY_INFORMATION)
 161                         ? xacl.info.sd_hs->sd->sacl : NULL,
 162                         (security_info & DACL_SECURITY_INFORMATION)
 163                         ? xacl.info.sd_hs->sd->dacl : NULL,
 164                         &sd_size);
 165
 166         TALLOC_FREE(xacl.info.sd);
 167
 168         return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
 169 }
 170
 171 /*******************************************************************
 172  Pull a security descriptor into a DATA_BLOB from a tdb store.
 173 *******************************************************************/
 174
 175 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
 176                         vfs_handle_struct *handle,
 177                         files_struct *fsp,
 178                         const char *name,
 179                         DATA_BLOB *pblob)
 180 {
 181         uint8 id_buf[16];
 182         TDB_DATA data;
 183         struct file_id id;
 184         struct db_context *db;
 185         SMB_STRUCT_STAT sbuf;
 186
 187         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 188                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 189
 190         if (fsp && fsp->fh->fd != -1) {
 191                 if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 192                         return map_nt_error_from_unix(errno);
 193                 }
 194         } else {
 195                 if (SMB_VFS_STAT(handle->conn, name, &sbuf) == -1) {
 196                         return map_nt_error_from_unix(errno);
 197                 }
 198         }
 199         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 200
 201         push_file_id_16((char *)id_buf, &id);
 202
 203         if (db->fetch(db,
 204                         ctx,
 205                         make_tdb_data(id_buf, sizeof(id_buf)),
 206                         &data) == -1) {
 207                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 208         }
 209
 210         pblob->data = data.dptr;
 211         pblob->length = data.dsize;
 212
 213         DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
 214                 (unsigned int)data.dsize, name ));
 215
 216         if (pblob->length == 0 || pblob->data == NULL) {
 217                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 218         }
 219         return NT_STATUS_OK;
 220 }
 221
 222 /*******************************************************************
 223  Create a DATA_BLOB from a security descriptor.
 224 *******************************************************************/
 225
 226 static NTSTATUS create_acl_blob(const struct security_descriptor *psd, DATA_BLOB *pblob)
 227 {
 228         struct xattr_NTACL xacl;
 229         struct security_descriptor_hash sd_hs;
 230         enum ndr_err_code ndr_err;
 231         TALLOC_CTX *ctx = talloc_tos();
 232
 233         ZERO_STRUCT(xacl);
 234         ZERO_STRUCT(sd_hs);
 235
 236         xacl.version = 2;
 237         xacl.info.sd_hs = &sd_hs;
 238         xacl.info.sd_hs->sd = CONST_DISCARD(struct security_descriptor *, psd);
 239         memset(&xacl.info.sd_hs->hash[0], '\0', 16);
 240
 241         ndr_err = ndr_push_struct_blob(
 242                         pblob, ctx, &xacl,
 243                         (ndr_push_flags_fn_t)ndr_push_xattr_NTACL);
 244
 245         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 246                 DEBUG(5, ("create_acl_blob: ndr_push_xattr_NTACL failed: %s\n",
 247                         ndr_errstr(ndr_err)));
 248                 return ndr_map_error2ntstatus(ndr_err);;
 249         }
 250
 251         return NT_STATUS_OK;
 252 }
 253
 254 /*******************************************************************
 255  Store a DATA_BLOB into a tdb record given an fsp pointer.
 256 *******************************************************************/
 257
 258 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
 259                                 files_struct *fsp,
 260                                 DATA_BLOB *pblob)
 261 {
 262         uint8 id_buf[16];
 263         struct file_id id;
 264         SMB_STRUCT_STAT sbuf;
 265         TDB_DATA data;
 266         struct db_context *db;
 267         struct db_record *rec;
 268
 269         DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
 270                         (unsigned int)pblob->length, fsp->fsp_name));
 271
 272         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 273                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 274
 275         if (fsp->fh->fd != -1) {
 276                 if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 277                         return map_nt_error_from_unix(errno);
 278                 }
 279         } else {
 280                 if (SMB_VFS_STAT(handle->conn, fsp->fsp_name, &sbuf) == -1) {
 281                         return map_nt_error_from_unix(errno);
 282                 }
 283         }
 284         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 285
 286         push_file_id_16((char *)id_buf, &id);
 287         rec = db->fetch_locked(db, talloc_tos(),
 288                                 make_tdb_data(id_buf,
 289                                         sizeof(id_buf)));
 290         if (rec == NULL) {
 291                 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
 292                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 293         }
 294         data.dptr = pblob->data;
 295         data.dsize = pblob->length;
 296         return rec->store(rec, data, 0);
 297 }
 298
 299 /*******************************************************************
 300  Store a DATA_BLOB into a tdb record given a pathname.
 301 *******************************************************************/
 302
 303 static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
 304                                         const char *fname,
 305                                         DATA_BLOB *pblob)
 306 {
 307         uint8 id_buf[16];
 308         struct file_id id;
 309         TDB_DATA data;
 310         SMB_STRUCT_STAT sbuf;
 311         struct db_context *db;
 312         struct db_record *rec;
 313
 314         DEBUG(10,("store_acl_blob_pathname: storing blob "
 315                         "length %u on file %s\n",
 316                         (unsigned int)pblob->length, fname));
 317
 318         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 319                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 320
 321         if (SMB_VFS_STAT(handle->conn, fname, &sbuf) == -1) {
 322                 return map_nt_error_from_unix(errno);
 323         }
 324
 325         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 326         push_file_id_16((char *)id_buf, &id);
 327
 328         rec = db->fetch_locked(db, talloc_tos(),
 329                                 make_tdb_data(id_buf,
 330                                         sizeof(id_buf)));
 331         if (rec == NULL) {
 332                 DEBUG(0, ("store_acl_blob_pathname_tdb: fetch_lock failed\n"));
 333                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 334         }
 335         data.dptr = pblob->data;
 336         data.dsize = pblob->length;
 337         return rec->store(rec, data, 0);
 338 }
 339
 340 /*******************************************************************
 341  Store a DATA_BLOB into an tdb given a pathname.
 342 *******************************************************************/
 343
 344 static NTSTATUS get_nt_acl_tdb_internal(vfs_handle_struct *handle,
 345                                         files_struct *fsp,
 346                                         const char *name,
 347                                         uint32 security_info,
 348                                         struct security_descriptor **ppdesc)
 349 {
 350         TALLOC_CTX *ctx = talloc_tos();
 351         DATA_BLOB blob;
 352         NTSTATUS status;
 353
 354         if (fsp && name == NULL) {
 355                 name = fsp->fsp_name;
 356         }
 357
 358         DEBUG(10, ("get_nt_acl_tdb_internal: name=%s\n", name));
 359
 360         status = get_acl_blob(ctx, handle, fsp, name, &blob);
 361         if (!NT_STATUS_IS_OK(status)) {
 362                 DEBUG(10, ("get_acl_blob returned %s\n", nt_errstr(status)));
 363                 return status;
 364         }
 365
 366         status = parse_acl_blob(&blob, security_info, ppdesc);
 367         if (!NT_STATUS_IS_OK(status)) {
 368                 DEBUG(10, ("parse_acl_blob returned %s\n",
 369                                 nt_errstr(status)));
 370                 return status;
 371         }
 372
 373         TALLOC_FREE(blob.data);
 374         return status;
 375 }
 376
 377 /*********************************************************************
 378  Create a default security descriptor for a file in case no inheritance
 379  exists. All permissions to the owner and SYSTEM.
 380 *********************************************************************/
 381
 382 static struct security_descriptor *default_file_sd(TALLOC_CTX *mem_ctx,
 383                                                 SMB_STRUCT_STAT *psbuf)
 384 {
 385         struct dom_sid owner_sid, group_sid;
 386         size_t sd_size;
 387         struct security_ace *pace = NULL;
 388         struct security_acl *pacl = NULL;
 389
 390         uid_to_sid(&owner_sid, psbuf->st_uid);
 391         gid_to_sid(&group_sid, psbuf->st_gid);
 392
 393         pace = TALLOC_ARRAY(mem_ctx, struct security_ace, 2);
 394         if (!pace) {
 395                 return NULL;
 396         }
 397
 398         init_sec_ace(&pace[0], &owner_sid, SEC_ACE_TYPE_ACCESS_ALLOWED,
 399                         SEC_RIGHTS_FILE_ALL, 0);
 400         init_sec_ace(&pace[1], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED,
 401                         SEC_RIGHTS_FILE_ALL, 0);
 402
 403         pacl = make_sec_acl(mem_ctx,
 404                                 NT4_ACL_REVISION,
 405                                 2,
 406                                 pace);
 407         if (!pacl) {
 408                 return NULL;
 409         }
 410         return make_sec_desc(mem_ctx,
 411                         SECURITY_DESCRIPTOR_REVISION_1,
 412                         SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
 413                         &owner_sid,
 414                         &group_sid,
 415                         NULL,
 416                         pacl,
 417                         &sd_size);
 418 }
 419
 420 /*********************************************************************
 421 *********************************************************************/
 422
 423 static NTSTATUS inherit_new_acl(vfs_handle_struct *handle,
 424                                         const char *fname,
 425                                         files_struct *fsp,
 426                                         bool container)
 427 {
 428         TALLOC_CTX *ctx = talloc_tos();
 429         NTSTATUS status;
 430         struct security_descriptor *parent_desc = NULL;
 431         struct security_descriptor *psd = NULL;
 432         DATA_BLOB blob;
 433         size_t size;
 434         char *parent_name;
 435
 436         if (!parent_dirname_talloc(ctx,
 437                                 fname,
 438                                 &parent_name,
 439                                 NULL)) {
 440                 return NT_STATUS_NO_MEMORY;
 441         }
 442
 443         DEBUG(10,("inherit_new_acl: check directory %s\n",
 444                         parent_name));
 445
 446         status = get_nt_acl_tdb_internal(handle,
 447                                         NULL,
 448                                         parent_name,
 449                                         (OWNER_SECURITY_INFORMATION |
 450                                          GROUP_SECURITY_INFORMATION |
 451                                          DACL_SECURITY_INFORMATION),
 452                                         &parent_desc);
 453         if (NT_STATUS_IS_OK(status)) {
 454                 /* Create an inherited descriptor from the parent. */
 455
 456                 if (DEBUGLEVEL >= 10) {
 457                         DEBUG(10,("inherit_new_acl: parent acl is:\n"));
 458                         NDR_PRINT_DEBUG(security_descriptor, parent_desc);
 459                 }
 460
 461                 status = se_create_child_secdesc(ctx,
 462                                 &psd,
 463                                 &size,
 464                                 parent_desc,
 465                                 &handle->conn->server_info->ptok->user_sids[PRIMARY_USER_SID_INDEX],
 466                                 &handle->conn->server_info->ptok->user_sids[PRIMARY_GROUP_SID_INDEX],
 467                                 container);
 468                 if (!NT_STATUS_IS_OK(status)) {
 469                         return status;
 470                 }
 471
 472                 if (DEBUGLEVEL >= 10) {
 473                         DEBUG(10,("inherit_new_acl: child acl is:\n"));
 474                         NDR_PRINT_DEBUG(security_descriptor, psd);
 475                 }
 476
 477         } else {
 478                 DEBUG(10,("inherit_new_acl: directory %s failed "
 479                         "to get acl %s\n",
 480                         parent_name,
 481                         nt_errstr(status) ));
 482         }
 483
 484         if (!psd || psd->dacl == NULL) {
 485                 SMB_STRUCT_STAT sbuf;
 486                 int ret;
 487
 488                 TALLOC_FREE(psd);
 489                 if (fsp && !fsp->is_directory && fsp->fh->fd != -1) {
 490                         ret = SMB_VFS_FSTAT(fsp, &sbuf);
 491                 } else {
 492                         ret = SMB_VFS_STAT(handle->conn,fname, &sbuf);
 493                 }
 494                 if (ret == -1) {
 495                         return map_nt_error_from_unix(errno);
 496                 }
 497                 psd = default_file_sd(ctx, &sbuf);
 498                 if (!psd) {
 499                         return NT_STATUS_NO_MEMORY;
 500                 }
 501
 502                 if (DEBUGLEVEL >= 10) {
 503                         DEBUG(10,("inherit_new_acl: default acl is:\n"));
 504                         NDR_PRINT_DEBUG(security_descriptor, psd);
 505                 }
 506         }
 507
 508         status = create_acl_blob(psd, &blob);
 509         if (!NT_STATUS_IS_OK(status)) {
 510                 return status;
 511         }
 512         if (fsp) {
 513                 return store_acl_blob_fsp(handle, fsp, &blob);
 514         } else {
 515                 return store_acl_blob_pathname(handle, fname, &blob);
 516         }
 517 }
 518
 519 /*********************************************************************
 520  Check ACL on open. For new files inherit from parent directory.
 521 *********************************************************************/
 522
 523 static int open_acl_tdb(vfs_handle_struct *handle,
 524                                         const char *fname,
 525                                         files_struct *fsp,
 526                                         int flags,
 527                                         mode_t mode)
 528 {
 529         uint32_t access_granted = 0;
 530         struct security_descriptor *pdesc = NULL;
 531         bool file_existed = true;
 532         NTSTATUS status = get_nt_acl_tdb_internal(handle,
 533                                         NULL,
 534                                         fname,
 535                                         (OWNER_SECURITY_INFORMATION |
 536                                          GROUP_SECURITY_INFORMATION |
 537                                          DACL_SECURITY_INFORMATION),
 538                                         &pdesc);
 539         if (NT_STATUS_IS_OK(status)) {
 540                 /* See if we can access it. */
 541                 status = smb1_file_se_access_check(pdesc,
 542                                         handle->conn->server_info->ptok,
 543                                         fsp->access_mask,
 544                                         &access_granted);
 545                 if (!NT_STATUS_IS_OK(status)) {
 546                         DEBUG(10,("open_acl_tdb: file %s open "
 547                                 "refused with error %s\n",
 548                                 fname,
 549                                 nt_errstr(status) ));
 550                         errno = map_errno_from_nt_status(status);
 551                         return -1;
 552                 }
 553         } else if (NT_STATUS_EQUAL(status,NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 554                 file_existed = false;
 555         }
 556
 557         DEBUG(10,("open_acl_tdb: get_nt_acl_attr_internal for "
 558                 "file %s returned %s\n",
 559                 fname,
 560                 nt_errstr(status) ));
 561
 562         fsp->fh->fd = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
 563
 564         if (!file_existed && fsp->fh->fd != -1) {
 565                 /* File was created. Inherit from parent directory. */
 566                 string_set(&fsp->fsp_name, fname);
 567                 inherit_new_acl(handle, fname, fsp, false);
 568         }
 569
 570         return fsp->fh->fd;
 571 }
 572
 573 /*********************************************************************
 574  On unlink we need to delete the tdb record (if using tdb).
 575 *********************************************************************/
 576
 577 static int unlink_acl_tdb(vfs_handle_struct *handle, const char *path)
 578 {
 579         SMB_STRUCT_STAT sbuf;
 580         struct db_context *db;
 581         int ret;
 582
 583         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 584
 585         if (SMB_VFS_STAT(handle->conn, path, &sbuf) == -1) {
 586                 return -1;
 587         }
 588
 589         ret = SMB_VFS_NEXT_UNLINK(handle, path);
 590
 591         if (ret == -1) {
 592                 return -1;
 593         }
 594
 595         acl_tdb_delete(handle, db, &sbuf);
 596         return 0;
 597 }
 598
 599 /*********************************************************************
 600  Store an inherited SD on mkdir.
 601 *********************************************************************/
 602
 603 static int mkdir_acl_tdb(vfs_handle_struct *handle, const char *path, mode_t mode)
 604 {
 605         int ret = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 606
 607         if (ret == -1) {
 608                 return ret;
 609         }
 610         /* New directory - inherit from parent. */
 611         inherit_new_acl(handle, path, NULL, true);
 612         return ret;
 613 }
 614
 615 /*********************************************************************
 616  On rmdir we need to delete the tdb record (if using tdb).
 617 *********************************************************************/
 618
 619 static int rmdir_acl_tdb(vfs_handle_struct *handle, const char *path)
 620 {
 621
 622         SMB_STRUCT_STAT sbuf;
 623         struct db_context *db;
 624         int ret;
 625
 626         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 627
 628         if (SMB_VFS_STAT(handle->conn, path, &sbuf) == -1) {
 629                 return -1;
 630         }
 631
 632         ret = SMB_VFS_NEXT_RMDIR(handle, path);
 633         if (ret == -1) {
 634                 return -1;
 635         }
 636
 637         acl_tdb_delete(handle, db, &sbuf);
 638         return 0;
 639 }
 640
 641 /*********************************************************************
 642  Fetch a security descriptor given an fsp.
 643 *********************************************************************/
 644
 645 static NTSTATUS fget_nt_acl_tdb(vfs_handle_struct *handle, files_struct *fsp,
 646         uint32 security_info, struct security_descriptor **ppdesc)
 647 {
 648         NTSTATUS status = get_nt_acl_tdb_internal(handle, fsp,
 649                                 NULL, security_info, ppdesc);
 650         if (NT_STATUS_IS_OK(status)) {
 651                 if (DEBUGLEVEL >= 10) {
 652                         DEBUG(10,("fget_nt_acl_tdb: returning tdb sd for file %s\n",
 653                                 fsp->fsp_name));
 654                         NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
 655                 }
 656                 return NT_STATUS_OK;
 657         }
 658
 659         DEBUG(10,("fget_nt_acl_tdb: failed to get tdb sd for file %s, Error %s\n",
 660                         fsp->fsp_name,
 661                         nt_errstr(status) ));
 662
 663         return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp,
 664                         security_info, ppdesc);
 665 }
 666
 667 /*********************************************************************
 668  Fetch a security descriptor given a pathname.
 669 *********************************************************************/
 670
 671 static NTSTATUS get_nt_acl_tdb(vfs_handle_struct *handle,
 672         const char *name, uint32 security_info, struct security_descriptor **ppdesc)
 673 {
 674         NTSTATUS status = get_nt_acl_tdb_internal(handle, NULL,
 675                                 name, security_info, ppdesc);
 676         if (NT_STATUS_IS_OK(status)) {
 677                 if (DEBUGLEVEL >= 10) {
 678                         DEBUG(10,("get_nt_acl_tdb: returning tdb sd for file %s\n",
 679                                 name));
 680                         NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
 681                 }
 682                 return NT_STATUS_OK;
 683         }
 684
 685         DEBUG(10,("get_nt_acl_tdb: failed to get tdb sd for file %s, Error %s\n",
 686                         name,
 687                         nt_errstr(status) ));
 688
 689         return SMB_VFS_NEXT_GET_NT_ACL(handle, name,
 690                         security_info, ppdesc);
 691 }
 692
 693 /*********************************************************************
 694  Store a security descriptor given an fsp.
 695 *********************************************************************/
 696
 697 static NTSTATUS fset_nt_acl_tdb(vfs_handle_struct *handle, files_struct *fsp,
 698         uint32 security_info_sent, const struct security_descriptor *psd)
 699 {
 700         NTSTATUS status;
 701         DATA_BLOB blob;
 702
 703         if (DEBUGLEVEL >= 10) {
 704                 DEBUG(10,("fset_nt_acl_tdb: incoming sd for file %s\n",
 705                         fsp->fsp_name));
 706                 NDR_PRINT_DEBUG(security_descriptor,
 707                         CONST_DISCARD(struct security_descriptor *,psd));
 708         }
 709
 710         status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 711         if (!NT_STATUS_IS_OK(status)) {
 712                 return status;
 713         }
 714
 715         /* Ensure owner and group are set. */
 716         if (!psd->owner_sid || !psd->group_sid) {
 717                 int ret;
 718                 SMB_STRUCT_STAT sbuf;
 719                 DOM_SID owner_sid, group_sid;
 720                 struct security_descriptor *nc_psd = dup_sec_desc(talloc_tos(), psd);
 721
 722                 if (!nc_psd) {
 723                         return NT_STATUS_OK;
 724                 }
 725                 if (fsp->is_directory || fsp->fh->fd == -1) {
 726                         ret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
 727                 } else {
 728                         ret = SMB_VFS_FSTAT(fsp, &sbuf);
 729                 }
 730                 if (ret == -1) {
 731                         /* Lower level acl set succeeded,
 732                          * so still return OK. */
 733                         return NT_STATUS_OK;
 734                 }
 735                 create_file_sids(&sbuf, &owner_sid, &group_sid);
 736                 /* This is safe as nc_psd is discarded at fn exit. */
 737                 nc_psd->owner_sid = &owner_sid;
 738                 nc_psd->group_sid = &group_sid;
 739                 security_info_sent |= (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION);
 740                 psd = nc_psd;
 741         }
 742
 743         if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
 744                         psd->dacl != NULL &&
 745                         (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
 746                                 SE_DESC_DACL_AUTO_INHERIT_REQ))==
 747                                 (SE_DESC_DACL_AUTO_INHERITED|
 748                                 SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
 749                 struct security_descriptor *new_psd = NULL;
 750                 status = append_parent_acl(fsp, psd, &new_psd);
 751                 if (!NT_STATUS_IS_OK(status)) {
 752                         /* Lower level acl set succeeded,
 753                          * so still return OK. */
 754                         return NT_STATUS_OK;
 755                 }
 756                 psd = new_psd;
 757         }
 758
 759         if (DEBUGLEVEL >= 10) {
 760                 DEBUG(10,("fset_nt_acl_tdb: storing tdb sd for file %s\n",
 761                         fsp->fsp_name));
 762                 NDR_PRINT_DEBUG(security_descriptor,
 763                         CONST_DISCARD(struct security_descriptor *,psd));
 764         }
 765         create_acl_blob(psd, &blob);
 766         store_acl_blob_fsp(handle, fsp, &blob);
 767
 768         return NT_STATUS_OK;
 769 }
 770
 771 /*******************************************************************
 772  Handle opening the storage tdb if so configured.
 773 *******************************************************************/
 774
 775 static int connect_acl_tdb(struct vfs_handle_struct *handle,
 776                                 const char *service,
 777                                 const char *user)
 778 {
 779         struct db_context *db;
 780         int res;
 781
 782         res = SMB_VFS_NEXT_CONNECT(handle, service, user);
 783         if (res < 0) {
 784                 return res;
 785         }
 786
 787         if (!acl_tdb_init(&db)) {
 788                 SMB_VFS_NEXT_DISCONNECT(handle);
 789                 return -1;
 790         }
 791
 792         SMB_VFS_HANDLE_SET_DATA(handle, db, free_acl_tdb_data,
 793                                 struct db_context, return -1);
 794
 795         return 0;
 796 }
 797
 798 /*********************************************************************
 799  Remove a Windows ACL - we're setting the underlying POSIX ACL.
 800 *********************************************************************/
 801
 802 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
 803                               const char *path,
 804                               SMB_ACL_TYPE_T type,
 805                               SMB_ACL_T theacl)
 806 {
 807         SMB_STRUCT_STAT sbuf;
 808         struct db_context *db;
 809         int ret;
 810
 811         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 812
 813         if (SMB_VFS_STAT(handle->conn, path, &sbuf) == -1) {
 814                 return -1;
 815         }
 816
 817         ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
 818                                                 path,
 819                                                 type,
 820                                                 theacl);
 821         if (ret == -1) {
 822                 return -1;
 823         }
 824
 825         acl_tdb_delete(handle, db, &sbuf);
 826         return 0;
 827 }
 828
 829 /*********************************************************************
 830  Remove a Windows ACL - we're setting the underlying POSIX ACL.
 831 *********************************************************************/
 832
 833 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
 834                             files_struct *fsp,
 835                             SMB_ACL_T theacl)
 836 {
 837         SMB_STRUCT_STAT sbuf;
 838         struct db_context *db;
 839         int ret;
 840
 841         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 842
 843         if (fsp->is_directory || fsp->fh->fd == -1) {
 844                 ret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
 845         } else {
 846                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
 847         }
 848         if (ret == -1) {
 849                 return -1;
 850         }
 851
 852         ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
 853                                                 fsp,
 854                                                 theacl);
 855         if (ret == -1) {
 856                 return -1;
 857         }
 858
 859         acl_tdb_delete(handle, db, &sbuf);
 860         return 0;
 861 }
 862
 863 /* VFS operations structure */
 864
 865 static vfs_op_tuple skel_op_tuples[] =
 866 {
 867         {SMB_VFS_OP(connect_acl_tdb), SMB_VFS_OP_CONNECT,  SMB_VFS_LAYER_TRANSPARENT},
 868
 869         {SMB_VFS_OP(mkdir_acl_tdb), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_TRANSPARENT},
 870         {SMB_VFS_OP(rmdir_acl_tdb), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT},
 871
 872         {SMB_VFS_OP(open_acl_tdb),  SMB_VFS_OP_OPEN,  SMB_VFS_LAYER_TRANSPARENT},
 873         {SMB_VFS_OP(unlink_acl_tdb), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT},
 874
 875         /* NT File ACL operations */
 876
 877         {SMB_VFS_OP(fget_nt_acl_tdb),SMB_VFS_OP_FGET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
 878         {SMB_VFS_OP(get_nt_acl_tdb), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
 879         {SMB_VFS_OP(fset_nt_acl_tdb),SMB_VFS_OP_FSET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
 880
 881         /* POSIX ACL operations. */
 882         {SMB_VFS_OP(sys_acl_set_file_tdb), SMB_VFS_OP_SYS_ACL_SET_FILE, SMB_VFS_LAYER_TRANSPARENT},
 883         {SMB_VFS_OP(sys_acl_set_fd_tdb), SMB_VFS_OP_SYS_ACL_SET_FD, SMB_VFS_LAYER_TRANSPARENT},
 884
 885         {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
 886 };
 887
 888 NTSTATUS vfs_acl_tdb_init(void)
 889 {
 890         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb", skel_op_tuples);
 891 }