wimlib.net Git - wimlib/blob - src/win32_apply.c

   1 /*
   2  * win32_apply.c - Windows-specific code for applying files from a WIM image.
   3  */
   4
   5 /*
   6  * Copyright (C) 2013 Eric Biggers
   7  *
   8  * This file is part of wimlib, a library for working with WIM files.
   9  *
  10  * wimlib is free software; you can redistribute it and/or modify it under the
  11  * terms of the GNU General Public License as published by the Free
  12  * Software Foundation; either version 3 of the License, or (at your option)
  13  * any later version.
  14  *
  15  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  16  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  17  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  18  * details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  22  */
  23
  24 #ifdef __WIN32__
  25
  26 #ifdef HAVE_CONFIG_H
  27 #  include "config.h"
  28 #endif
  29
  30 #include "wimlib/win32_common.h"
  31
  32 #include "wimlib/apply.h"
  33 #include "wimlib/error.h"
  34 #include "wimlib/lookup_table.h"
  35
  36 static int
  37 win32_start_extract(const wchar_t *path, struct apply_ctx *ctx)
  38 {
  39         int ret;
  40         unsigned vol_flags;
  41         bool supports_SetFileShortName;
  42
  43         ret = win32_get_vol_flags(path, &vol_flags, &supports_SetFileShortName);
  44         if (ret)
  45                 return ret;
  46
  47         ctx->supported_features.archive_files = 1;
  48         ctx->supported_features.hidden_files = 1;
  49         ctx->supported_features.system_files = 1;
  50
  51         if (vol_flags & FILE_FILE_COMPRESSION)
  52                 ctx->supported_features.compressed_files = 1;
  53
  54         if (vol_flags & FILE_SUPPORTS_ENCRYPTION) {
  55                 ctx->supported_features.encrypted_files = 1;
  56                 ctx->supported_features.encrypted_directories = 1;
  57         }
  58
  59         ctx->supported_features.not_context_indexed_files = 1;
  60
  61         if (vol_flags & FILE_SUPPORTS_SPARSE_FILES)
  62                 ctx->supported_features.sparse_files = 1;
  63
  64         if (vol_flags & FILE_NAMED_STREAMS)
  65                 ctx->supported_features.named_data_streams = 1;
  66
  67         if (vol_flags & FILE_SUPPORTS_HARD_LINKS)
  68                 ctx->supported_features.hard_links = 1;
  69
  70         if (vol_flags & FILE_SUPPORTS_REPARSE_POINTS) {
  71                 ctx->supported_features.reparse_points = 1;
  72                 if (win32func_CreateSymbolicLinkW)
  73                         ctx->supported_features.symlink_reparse_points = 1;
  74         }
  75
  76         if (vol_flags & FILE_PERSISTENT_ACLS)
  77                 ctx->supported_features.security_descriptors = 1;
  78
  79         if (supports_SetFileShortName)
  80                 ctx->supported_features.short_names = 1;
  81         return 0;
  82 }
  83
  84 /* Create a normal file, overwriting one already present.  */
  85 static int
  86 win32_create_file(const wchar_t *path, struct apply_ctx *ctx, u64 *cookie_ret)
  87 {
  88         HANDLE h;
  89         unsigned retry_count = 0;
  90         DWORD dwFlagsAndAttributes = FILE_FLAG_BACKUP_SEMANTICS;
  91
  92 retry:
  93         /* WRITE_OWNER and WRITE_DAC privileges are required for some reason,
  94          * even through we're creating a new file.  */
  95         h = CreateFile(path, WRITE_OWNER | WRITE_DAC, 0, NULL,
  96                        CREATE_ALWAYS, dwFlagsAndAttributes, NULL);
  97         if (h == INVALID_HANDLE_VALUE) {
  98                 /* File couldn't be created.  */
  99                 DWORD err = GetLastError();
 100                 if (err == ERROR_ACCESS_DENIED && retry_count == 0) {
 101
 102                         /* Access denied error for the first time.  Try
 103                          * adjusting file attributes.  */
 104
 105                         /* Get attributes of the existing file.  */
 106                         DWORD attribs = GetFileAttributes(path);
 107                         if (attribs != INVALID_FILE_ATTRIBUTES &&
 108                             (attribs & (FILE_ATTRIBUTE_HIDDEN |
 109                                         FILE_ATTRIBUTE_SYSTEM |
 110                                         FILE_ATTRIBUTE_READONLY)))
 111                         {
 112                                 /* If the existing file has
 113                                  * FILE_ATTRIBUTE_HIDDEN and/or
 114                                  * FILE_ATTRIBUTE_SYSTEM, they must be set in
 115                                  * the call to CreateFile().  This is true even
 116                                  * when FILE_ATTRIBUTE_NORMAL was not specified,
 117                                  * contrary to the MS "documentation".  */
 118                                 dwFlagsAndAttributes |= (attribs &
 119                                                          (FILE_ATTRIBUTE_HIDDEN |
 120                                                           FILE_ATTRIBUTE_SYSTEM));
 121                                 /* If the existing file has
 122                                  * FILE_ATTRIBUTE_READONLY, it must be cleared
 123                                  * before attempting to create a new file over
 124                                  * it.  This is true even when the process has
 125                                  * the SE_RESTORE_NAME privilege and requested
 126                                  * the FILE_FLAG_BACKUP_SEMANTICS flag to
 127                                  * CreateFile().  */
 128                                 if (attribs & FILE_ATTRIBUTE_READONLY) {
 129                                         SetFileAttributes(path,
 130                                                           attribs & ~FILE_ATTRIBUTE_READONLY);
 131                                 }
 132                                 retry_count++;
 133                                 goto retry;
 134                         }
 135                 }
 136                 set_errno_from_win32_error(err);
 137                 return WIMLIB_ERR_OPEN;
 138         }
 139         CloseHandle(h);
 140         return 0;
 141 }
 142
 143 static int
 144 win32_create_directory(const wchar_t *path, struct apply_ctx *ctx,
 145                        u64 *cookie_ret)
 146 {
 147         if (!CreateDirectory(path, NULL))
 148                 if (GetLastError() != ERROR_ALREADY_EXISTS)
 149                         goto error;
 150         return 0;
 151
 152 error:
 153         set_errno_from_GetLastError();
 154         return WIMLIB_ERR_MKDIR;
 155 }
 156
 157 /* Delete a non-directory file, working around Windows quirks.  */
 158 static BOOL
 159 win32_delete_file_wrapper(const wchar_t *path)
 160 {
 161         DWORD attrib;
 162         DWORD err;
 163
 164         if (DeleteFile(path))
 165                 return TRUE;
 166
 167         err = GetLastError();
 168         attrib = GetFileAttributes(path);
 169         if (attrib & FILE_ATTRIBUTE_READONLY) {
 170                 /* Try again with FILE_ATTRIBUTE_READONLY cleared.  */
 171                 attrib &= ~FILE_ATTRIBUTE_READONLY;
 172                 if (SetFileAttributes(path, attrib)) {
 173                         if (DeleteFile(path))
 174                                 return TRUE;
 175                         else
 176                                 err = GetLastError();
 177                 }
 178         }
 179
 180         SetLastError(err);
 181         return FALSE;
 182 }
 183
 184 static int
 185 win32_create_hardlink(const wchar_t *oldpath, const wchar_t *newpath,
 186                       struct apply_ctx *ctx)
 187 {
 188         if (!CreateHardLink(newpath, oldpath, NULL)) {
 189                 if (GetLastError() != ERROR_ALREADY_EXISTS)
 190                         goto error;
 191                 if (!win32_delete_file_wrapper(newpath))
 192                         goto error;
 193                 if (!CreateHardLink(newpath, oldpath, NULL))
 194                         goto error;
 195         }
 196         return 0;
 197
 198 error:
 199         set_errno_from_GetLastError();
 200         return WIMLIB_ERR_LINK;
 201 }
 202
 203 static int
 204 win32_create_symlink(const wchar_t *oldpath, const wchar_t *newpath,
 205                      struct apply_ctx *ctx)
 206 {
 207         if (!(*win32func_CreateSymbolicLinkW)(newpath, oldpath, 0)) {
 208                 if (GetLastError() != ERROR_ALREADY_EXISTS)
 209                         goto error;
 210                 if (!win32_delete_file_wrapper(newpath))
 211                         goto error;
 212                 if (!(*win32func_CreateSymbolicLinkW)(newpath, oldpath, 0))
 213                         goto error;
 214         }
 215         return 0;
 216
 217 error:
 218         set_errno_from_GetLastError();
 219         return WIMLIB_ERR_LINK;
 220 }
 221
 222 static int
 223 win32_extract_wim_chunk(const void *buf, size_t len, void *arg)
 224 {
 225         HANDLE h = (HANDLE)arg;
 226         DWORD nbytes_written;
 227
 228         if (unlikely(!WriteFile(h, buf, len, &nbytes_written, NULL)))
 229                 goto error;
 230         if (unlikely(nbytes_written != len))
 231                 goto error;
 232         return 0;
 233
 234 error:
 235         set_errno_from_GetLastError();
 236         return WIMLIB_ERR_WRITE;
 237 }
 238
 239 static int
 240 win32_extract_stream(const wchar_t *path, const wchar_t *stream_name,
 241                      size_t stream_name_nchars,
 242                      struct wim_lookup_table_entry *lte, struct apply_ctx *ctx)
 243 {
 244         DWORD creationDisposition = OPEN_EXISTING;
 245         wchar_t *stream_path = (wchar_t*)path;
 246         HANDLE h;
 247         int ret;
 248
 249         if (stream_name_nchars) {
 250                 creationDisposition = CREATE_ALWAYS;
 251                 stream_path = alloca(sizeof(wchar_t) *
 252                                      (wcslen(path) + 1 +
 253                                       wcslen(stream_name) + 1));
 254                 tsprintf(stream_path, L"%ls:%ls", path, stream_name);
 255         }
 256
 257         h = CreateFile(stream_path, FILE_WRITE_DATA, 0, NULL,
 258                        creationDisposition, FILE_FLAG_BACKUP_SEMANTICS |
 259                                             FILE_FLAG_OPEN_REPARSE_POINT,
 260                        NULL);
 261         if (h == INVALID_HANDLE_VALUE)
 262                 goto error;
 263
 264         ret = 0;
 265         if (!lte)
 266                 goto out_close_handle;
 267         ret = extract_stream(lte, lte->size, win32_extract_wim_chunk, h);
 268 out_close_handle:
 269         if (!CloseHandle(h))
 270                 goto error;
 271         if (ret && !errno)
 272                 errno = -1;
 273         return ret;
 274
 275 error:
 276         set_errno_from_GetLastError();
 277         return WIMLIB_ERR_WRITE;
 278 }
 279
 280 static int
 281 win32_extract_unnamed_stream(file_spec_t file,
 282                              struct wim_lookup_table_entry *lte,
 283                              struct apply_ctx *ctx)
 284 {
 285         return win32_extract_stream(file.path, NULL, 0, lte, ctx);
 286 }
 287
 288 static int
 289 win32_extract_named_stream(file_spec_t file, const wchar_t *stream_name,
 290                            size_t stream_name_nchars,
 291                            struct wim_lookup_table_entry *lte, struct apply_ctx *ctx)
 292 {
 293         return win32_extract_stream(file.path, stream_name,
 294                                     stream_name_nchars, lte, ctx);
 295 }
 296
 297 struct win32_encrypted_extract_ctx {
 298         const struct wim_lookup_table_entry *lte;
 299         u64 offset;
 300 };
 301
 302 static DWORD WINAPI
 303 win32_encrypted_import_cb(unsigned char *data, void *_import_ctx,
 304                           unsigned long *len_p)
 305 {
 306         struct win32_encrypted_extract_ctx *import_ctx = _import_ctx;
 307         unsigned long len = *len_p;
 308         const struct wim_lookup_table_entry *lte = import_ctx->lte;
 309
 310         len = min(len, lte->size - import_ctx->offset);
 311
 312         if (read_partial_wim_stream_into_buf(lte, len, import_ctx->offset, data))
 313                 return ERROR_READ_FAULT;
 314
 315         import_ctx->offset += len;
 316         *len_p = len;
 317         return ERROR_SUCCESS;
 318 }
 319
 320 static int
 321 win32_extract_encrypted_stream(const wchar_t *path,
 322                                struct wim_lookup_table_entry *lte,
 323                                struct apply_ctx *ctx)
 324 {
 325         void *file_ctx;
 326         DWORD err;
 327         int ret;
 328         struct win32_encrypted_extract_ctx extract_ctx;
 329
 330         err = OpenEncryptedFileRaw(path, CREATE_FOR_IMPORT, &file_ctx);
 331         if (err != ERROR_SUCCESS) {
 332                 set_errno_from_win32_error(err);
 333                 ret = WIMLIB_ERR_OPEN;
 334                 goto out;
 335         }
 336
 337         extract_ctx.lte = lte;
 338         extract_ctx.offset = 0;
 339         err = WriteEncryptedFileRaw(win32_encrypted_import_cb, &extract_ctx,
 340                                     file_ctx);
 341         if (err != ERROR_SUCCESS) {
 342                 set_errno_from_win32_error(err);
 343                 ret = WIMLIB_ERR_WRITE;
 344                 goto out_close;
 345         }
 346
 347         ret = 0;
 348 out_close:
 349         CloseEncryptedFileRaw(file_ctx);
 350 out:
 351         return ret;
 352 }
 353
 354 static BOOL
 355 win32_set_special_file_attributes(const wchar_t *path, u32 attributes)
 356 {
 357         HANDLE h;
 358         DWORD err;
 359         USHORT compression_format = COMPRESSION_FORMAT_DEFAULT;
 360         DWORD bytes_returned;
 361
 362         h = win32_open_existing_file(path, GENERIC_READ | GENERIC_WRITE);
 363         if (h == INVALID_HANDLE_VALUE)
 364                 goto error;
 365
 366         if (attributes & FILE_ATTRIBUTE_SPARSE_FILE)
 367                 if (!DeviceIoControl(h, FSCTL_SET_SPARSE,
 368                                      NULL, 0,
 369                                      NULL, 0,
 370                                      &bytes_returned, NULL))
 371                         goto error_close_handle;
 372
 373         if (attributes & FILE_ATTRIBUTE_COMPRESSED)
 374                 if (!DeviceIoControl(h, FSCTL_SET_COMPRESSION,
 375                                      &compression_format, sizeof(USHORT),
 376                                      NULL, 0,
 377                                      &bytes_returned, NULL))
 378                         goto error_close_handle;
 379
 380         if (!CloseHandle(h))
 381                 goto error;
 382
 383         if (attributes & FILE_ATTRIBUTE_ENCRYPTED)
 384                 if (!EncryptFile(path))
 385                         goto error;
 386
 387         return TRUE;
 388
 389 error_close_handle:
 390         err = GetLastError();
 391         CloseHandle(h);
 392         SetLastError(err);
 393 error:
 394         return FALSE;
 395 }
 396
 397 static int
 398 win32_set_file_attributes(const wchar_t *path, u32 attributes,
 399                           struct apply_ctx *ctx, unsigned pass)
 400 {
 401         u32 special_attributes =
 402                 FILE_ATTRIBUTE_REPARSE_POINT |
 403                 FILE_ATTRIBUTE_DIRECTORY |
 404                 FILE_ATTRIBUTE_SPARSE_FILE |
 405                 FILE_ATTRIBUTE_COMPRESSED |
 406                 FILE_ATTRIBUTE_ENCRYPTED;
 407         u32 actual_attributes;
 408
 409         /* Delay setting FILE_ATTRIBUTE_READONLY on the initial pass (when files
 410          * are created, but data not extracted); otherwise the system will
 411          * refuse access to the file even if the process has SeRestorePrivilege.
 412          */
 413         if (pass == 0)
 414                 attributes &= ~FILE_ATTRIBUTE_READONLY;
 415
 416         if (!SetFileAttributes(path, attributes & ~special_attributes))
 417                 goto error;
 418
 419         if (pass != 0)
 420                 return 0;
 421
 422         if (attributes & (FILE_ATTRIBUTE_SPARSE_FILE |
 423                           FILE_ATTRIBUTE_ENCRYPTED |
 424                           FILE_ATTRIBUTE_COMPRESSED))
 425                 if (!win32_set_special_file_attributes(path, attributes))
 426                         goto error;
 427
 428         /* If file is not supposed to be encrypted or compressed, remove
 429          * defaulted encrypted or compressed attributes (from creating file in
 430          * encrypted or compressed directory).  */
 431         actual_attributes = GetFileAttributes(path);
 432         if (actual_attributes == INVALID_FILE_ATTRIBUTES)
 433                 goto error;
 434
 435         if ((actual_attributes & FILE_ATTRIBUTE_ENCRYPTED) &&
 436             !(attributes & FILE_ATTRIBUTE_ENCRYPTED))
 437                 if (!DecryptFile(path, 0))
 438                         goto error;
 439         if ((actual_attributes & FILE_ATTRIBUTE_COMPRESSED) &&
 440             !(attributes & FILE_ATTRIBUTE_COMPRESSED))
 441         {
 442                 HANDLE h;
 443                 DWORD bytes_returned;
 444                 USHORT compression_format = COMPRESSION_FORMAT_NONE;
 445
 446                 h = win32_open_existing_file(path, GENERIC_READ | GENERIC_WRITE);
 447                 if (h == INVALID_HANDLE_VALUE)
 448                         goto error;
 449
 450                 if (!DeviceIoControl(h, FSCTL_SET_COMPRESSION,
 451                                      &compression_format, sizeof(USHORT),
 452                                      NULL, 0,
 453                                      &bytes_returned, NULL))
 454                 {
 455                         DWORD err = GetLastError();
 456                         CloseHandle(h);
 457                         SetLastError(err);
 458                         goto error;
 459                 }
 460
 461                 if (!CloseHandle(h))
 462                         goto error;
 463         }
 464
 465         return 0;
 466
 467 error:
 468         set_errno_from_GetLastError();
 469         return WIMLIB_ERR_SET_ATTRIBUTES;
 470 }
 471
 472 static int
 473 win32_set_reparse_data(const wchar_t *path, const u8 *rpbuf, u16 rpbuflen,
 474                        struct apply_ctx *ctx)
 475 {
 476         HANDLE h;
 477         DWORD err;
 478         DWORD bytes_returned;
 479
 480         h = win32_open_existing_file(path, GENERIC_WRITE);
 481         if (h == INVALID_HANDLE_VALUE)
 482                 goto error;
 483
 484         if (!DeviceIoControl(h, FSCTL_SET_REPARSE_POINT,
 485                              (void*)rpbuf, rpbuflen,
 486                              NULL, 0, &bytes_returned, NULL))
 487                 goto error_close_handle;
 488
 489         if (!CloseHandle(h))
 490                 goto error;
 491
 492         return 0;
 493
 494 error_close_handle:
 495         err = GetLastError();
 496         CloseHandle(h);
 497         SetLastError(err);
 498 error:
 499         set_errno_from_GetLastError();
 500         return WIMLIB_ERR_WRITE; /* XXX: need better error code */
 501 }
 502
 503 static int
 504 win32_set_short_name(const wchar_t *path, const wchar_t *short_name,
 505                      size_t short_name_nchars, struct apply_ctx *ctx)
 506 {
 507         HANDLE h;
 508         DWORD err;
 509
 510         h = win32_open_existing_file(path, GENERIC_WRITE | DELETE);
 511         if (h == INVALID_HANDLE_VALUE)
 512                 goto error;
 513
 514         if (short_name_nchars) {
 515                 if (!SetFileShortName(h, short_name))
 516                         goto error_close_handle;
 517         } else if (running_on_windows_7_or_later()) {
 518                 if (!SetFileShortName(h, L""))
 519                         goto error_close_handle;
 520         }
 521
 522         if (!CloseHandle(h))
 523                 goto error;
 524
 525         return 0;
 526
 527 error_close_handle:
 528         err = GetLastError();
 529         CloseHandle(h);
 530         SetLastError(err);
 531 error:
 532         set_errno_from_GetLastError();
 533         return WIMLIB_ERR_WRITE; /* XXX: need better error code */
 534 }
 535
 536 static DWORD
 537 do_win32_set_security_descriptor(HANDLE h, const wchar_t *path,
 538                                  SECURITY_INFORMATION info,
 539                                  PSECURITY_DESCRIPTOR desc)
 540 {
 541 #ifdef WITH_NTDLL
 542         if (func_NtSetSecurityObject) {
 543                 return (*func_RtlNtStatusToDosError)(
 544                                 (*func_NtSetSecurityObject)(h, info, desc));
 545         }
 546 #endif
 547         if (SetFileSecurity(path, info, desc))
 548                 return ERROR_SUCCESS;
 549         else
 550                 return GetLastError();
 551 }
 552
 553 /*
 554  * Set an arbitrary security descriptor on an arbitrary file (or directory),
 555  * working around bugs and design flaws in the Windows operating system.
 556  *
 557  * On success, return 0.  On failure, return WIMLIB_ERR_SET_SECURITY and set
 558  * errno.  Note: if WIMLIB_EXTRACT_FLAG_STRICT_ACLS is not set in
 559  * ctx->extract_flags, this function succeeds iff any part of the security
 560  * descriptor was successfully set.
 561  */
 562 static int
 563 win32_set_security_descriptor(const wchar_t *path, const u8 *desc,
 564                               size_t desc_size, struct apply_ctx *ctx)
 565 {
 566         SECURITY_INFORMATION info;
 567         HANDLE h;
 568         int ret;
 569
 570         /* We really just want to set entire the security descriptor as-is, but
 571          * all available APIs require specifying the specific parts of the
 572          * descriptor being set.  Start out by requesting all parts be set.  If
 573          * permissions problems are encountered, fall back to omitting some
 574          * parts (first the SACL, then the DACL, then the owner), unless the
 575          * WIMLIB_EXTRACT_FLAG_STRICT_ACLS flag has been enabled.  */
 576         info = OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION |
 577                DACL_SECURITY_INFORMATION  | SACL_SECURITY_INFORMATION;
 578
 579         h = INVALID_HANDLE_VALUE;
 580
 581         /* Prefer NtSetSecurityObject() to SetFileSecurity().  SetFileSecurity()
 582          * itself necessarily uses NtSetSecurityObject() as the latter is the
 583          * underlying system call for setting security information, but
 584          * SetFileSecurity() opens the handle with NtCreateFile() without
 585          * FILE_OPEN_FILE_BACKUP_INTENT.  Hence, access checks are done and due
 586          * to the Windows security model, even a process running as the
 587          * Administrator can have access denied.  (Of course, this not mentioned
 588          * in the MS "documentation".)  */
 589
 590 #ifdef WITH_NTDLL
 591         if (func_NtSetSecurityObject) {
 592                 DWORD dwDesiredAccess;
 593
 594                 /* Open a handle for NtSetSecurityObject() with as many relevant
 595                  * access rights as possible.
 596                  *
 597                  * We don't know which rights will be actually granted.  It
 598                  * could be less than what is needed to actually assign the full
 599                  * security descriptor, especially if the process is running as
 600                  * a non-Administrator.  However, by default we just do the best
 601                  * we can, unless WIMLIB_EXTRACT_FLAG_STRICT_ACLS has been
 602                  * enabled.  The MAXIMUM_ALLOWED access right is seemingly
 603                  * designed for this use case; however, it does not work
 604                  * properly in all cases: it can cause CreateFile() to fail with
 605                  * ERROR_ACCESS_DENIED, even though by definition
 606                  * MAXIMUM_ALLOWED access only requests access rights that are
 607                  * *not* denied.  (Needless to say, MS does not document this
 608                  * bug.)  */
 609
 610                 dwDesiredAccess = WRITE_DAC |
 611                                   WRITE_OWNER |
 612                                   ACCESS_SYSTEM_SECURITY;
 613                 for (;;) {
 614                         DWORD err;
 615
 616                         h = win32_open_existing_file(path, dwDesiredAccess);
 617                         if (h != INVALID_HANDLE_VALUE)
 618                                 break;
 619                         err = GetLastError();
 620                         if (err == ERROR_ACCESS_DENIED ||
 621                             err == ERROR_PRIVILEGE_NOT_HELD)
 622                         {
 623                                 /* Don't increment partial_security_descriptors
 624                                  * here or check WIMLIB_EXTRACT_FLAG_STRICT_ACLS
 625                                  * here.  It will be done later if needed; here
 626                                  * we are just trying to get as many relevant
 627                                  * access rights as possible.  */
 628                                 if (dwDesiredAccess & ACCESS_SYSTEM_SECURITY) {
 629                                         dwDesiredAccess &= ~ACCESS_SYSTEM_SECURITY;
 630                                         continue;
 631                                 }
 632                                 if (dwDesiredAccess & WRITE_DAC) {
 633                                         dwDesiredAccess &= ~WRITE_DAC;
 634                                         continue;
 635                                 }
 636                                 if (dwDesiredAccess & WRITE_OWNER) {
 637                                         dwDesiredAccess &= ~WRITE_OWNER;
 638                                         continue;
 639                                 }
 640                         }
 641                         /* Other error, or couldn't open the file even with no
 642                          * access rights specified.  Something else must be
 643                          * wrong.  */
 644                         set_errno_from_win32_error(err);
 645                         return WIMLIB_ERR_SET_SECURITY;
 646                 }
 647         }
 648 #endif
 649
 650         /* Try setting the security descriptor.  */
 651         for (;;) {
 652                 DWORD err;
 653
 654                 err = do_win32_set_security_descriptor(h, path, info,
 655                                                        (PSECURITY_DESCRIPTOR)desc);
 656                 if (err == ERROR_SUCCESS) {
 657                         ret = 0;
 658                         break;
 659                 }
 660
 661                 /* Failed to set the requested parts of the security descriptor.
 662                  * If the error was permissions-related, try to set fewer parts
 663                  * of the security descriptor, unless
 664                  * WIMLIB_EXTRACT_FLAG_STRICT_ACLS is enabled.  */
 665                 if ((err == ERROR_PRIVILEGE_NOT_HELD ||
 666                      err == ERROR_ACCESS_DENIED) &&
 667                     !(ctx->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS))
 668                 {
 669                         if (info & SACL_SECURITY_INFORMATION) {
 670                                 info &= ~SACL_SECURITY_INFORMATION;
 671                                 ctx->partial_security_descriptors++;
 672                                 continue;
 673                         }
 674                         if (info & DACL_SECURITY_INFORMATION) {
 675                                 info &= ~DACL_SECURITY_INFORMATION;
 676                                 continue;
 677                         }
 678                         if (info & OWNER_SECURITY_INFORMATION) {
 679                                 info &= ~OWNER_SECURITY_INFORMATION;
 680                                 continue;
 681                         }
 682                         /* Nothing left except GROUP, and if we removed it we
 683                          * wouldn't have anything at all.  */
 684                 }
 685                 /* No part of the security descriptor could be set, or
 686                  * WIMLIB_EXTRACT_FLAG_STRICT_ACLS is enabled and the full
 687                  * security descriptor could not be set.  */
 688                 if (!(info & SACL_SECURITY_INFORMATION))
 689                         ctx->partial_security_descriptors--;
 690                 set_errno_from_win32_error(err);
 691                 ret = WIMLIB_ERR_SET_SECURITY;
 692                 break;
 693         }
 694
 695         /* Close handle opened for NtSetSecurityObject().  */
 696 #ifdef WITH_NTDLL
 697         if (func_NtSetSecurityObject)
 698                 CloseHandle(h);
 699 #endif
 700         return ret;
 701 }
 702
 703 static int
 704 win32_set_timestamps(const wchar_t *path, u64 creation_time,
 705                      u64 last_write_time, u64 last_access_time,
 706                      struct apply_ctx *ctx)
 707 {
 708         HANDLE h;
 709         DWORD err;
 710         FILETIME creationTime = {.dwLowDateTime = creation_time & 0xffffffff,
 711                                  .dwHighDateTime = creation_time >> 32};
 712         FILETIME lastAccessTime = {.dwLowDateTime = last_access_time & 0xffffffff,
 713                                   .dwHighDateTime = last_access_time >> 32};
 714         FILETIME lastWriteTime = {.dwLowDateTime = last_write_time & 0xffffffff,
 715                                   .dwHighDateTime = last_write_time >> 32};
 716
 717         h = win32_open_existing_file(path, FILE_WRITE_ATTRIBUTES);
 718         if (h == INVALID_HANDLE_VALUE)
 719                 goto error;
 720
 721         if (!SetFileTime(h, &creationTime, &lastAccessTime, &lastWriteTime))
 722                 goto error_close_handle;
 723
 724         if (!CloseHandle(h))
 725                 goto error;
 726
 727         return 0;
 728
 729 error_close_handle:
 730         err = GetLastError();
 731         CloseHandle(h);
 732         SetLastError(err);
 733 error:
 734         set_errno_from_GetLastError();
 735         return WIMLIB_ERR_SET_TIMESTAMPS;
 736 }
 737
 738 const struct apply_operations win32_apply_ops = {
 739         .name = L"Win32",
 740
 741         .target_is_root           = win32_path_is_root_of_drive,
 742         .start_extract            = win32_start_extract,
 743         .create_file              = win32_create_file,
 744         .create_directory         = win32_create_directory,
 745         .create_hardlink          = win32_create_hardlink,
 746         .create_symlink           = win32_create_symlink,
 747         .extract_unnamed_stream   = win32_extract_unnamed_stream,
 748         .extract_named_stream     = win32_extract_named_stream,
 749         .extract_encrypted_stream = win32_extract_encrypted_stream,
 750         .set_file_attributes      = win32_set_file_attributes,
 751         .set_reparse_data         = win32_set_reparse_data,
 752         .set_short_name           = win32_set_short_name,
 753         .set_security_descriptor  = win32_set_security_descriptor,
 754         .set_timestamps           = win32_set_timestamps,
 755
 756         .path_prefix = L"\\\\?\\",
 757         .path_prefix_nchars = 4,
 758         .path_separator = L'\\',
 759         .path_max = 32768,
 760
 761         .requires_realtarget_in_paths = 1,
 762         .realpath_works_on_nonexisting_files = 1,
 763         .root_directory_is_special = 1,
 764         .requires_final_set_attributes_pass = 1,
 765         .extract_encrypted_stream_creates_file = 1,
 766         .requires_short_name_reordering = 1, /* TODO: check if this is really needed  */
 767 };
 768
 769 #endif /* __WIN32__ */