2 * win32_apply.c - Windows-specific code for applying files from a WIM image.
6 * Copyright (C) 2013, 2014, 2015 Eric Biggers
8 * This file is free software; you can redistribute it and/or modify it under
9 * the terms of the GNU Lesser General Public License as published by the Free
10 * Software Foundation; either version 3 of the License, or (at your option) any
13 * This file is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this file; if not, see http://www.gnu.org/licenses/.
28 #include "wimlib/win32_common.h"
30 #include "wimlib/apply.h"
31 #include "wimlib/assert.h"
32 #include "wimlib/blob_table.h"
33 #include "wimlib/capture.h" /* for mangle_pat() and match_pattern_list() */
34 #include "wimlib/dentry.h"
35 #include "wimlib/encoding.h"
36 #include "wimlib/error.h"
37 #include "wimlib/metadata.h"
38 #include "wimlib/paths.h"
39 #include "wimlib/pattern.h"
40 #include "wimlib/reparse.h"
41 #include "wimlib/textfile.h"
42 #include "wimlib/xml.h"
43 #include "wimlib/wimboot.h"
44 #include "wimlib/wof.h"
46 struct win32_apply_ctx {
48 /* Extract flags, the pointer to the WIMStruct, etc. */
49 struct apply_ctx common;
51 /* WIMBoot information, only filled in if WIMLIB_EXTRACT_FLAG_WIMBOOT
54 /* This array contains the WIM files registered with WOF on the
55 * target volume for this extraction operation. All WIMStructs
56 * in this array are distinct and have ->filename != NULL. */
60 u8 blob_table_hash[SHA1_HASH_SIZE];
64 bool have_wrong_version_wims;
65 bool have_uncompressed_wims;
66 bool have_unsupported_compressed_resources;
67 bool have_huge_resources;
70 /* External backing information */
71 struct string_set *prepopulate_pats;
72 void *mem_prepopulate_pats;
73 bool tried_to_load_prepopulate_list;
75 /* Open handle to the target directory */
78 /* NT namespace path to the target directory (buffer allocated) */
79 UNICODE_STRING target_ntpath;
81 /* Temporary buffer for building paths (buffer allocated) */
82 UNICODE_STRING pathbuf;
84 /* Object attributes to reuse for opening files in the target directory.
85 * (attr.ObjectName == &pathbuf) and (attr.RootDirectory == h_target).
87 OBJECT_ATTRIBUTES attr;
89 /* Temporary I/O status block for system calls */
92 /* Allocated buffer for creating "printable" paths from our
93 * target-relative NT paths */
94 wchar_t *print_buffer;
96 /* Allocated buffer for reading blob data when it cannot be extracted
100 /* Pointer to the next byte in @data_buffer to fill */
103 /* Size allocated in @data_buffer */
104 size_t data_buffer_size;
106 /* Current offset in the raw encrypted file being written */
107 size_t encrypted_offset;
109 /* Current size of the raw encrypted file being written */
110 size_t encrypted_size;
112 /* Temporary buffer for reparse data */
113 struct reparse_buffer_disk rpbuf;
115 /* Temporary buffer for reparse data of "fixed" absolute symbolic links
117 struct reparse_buffer_disk rpfixbuf;
119 /* Array of open handles to filesystem streams currently being written
121 HANDLE open_handles[MAX_OPEN_FILES];
123 /* Number of handles in @open_handles currently open (filled in from the
124 * beginning of the array) */
125 unsigned num_open_handles;
127 /* List of dentries, joined by @d_tmp_list, that need to have reparse
128 * data extracted as soon as the whole blob has been read into
130 struct list_head reparse_dentries;
132 /* List of dentries, joined by @d_tmp_list, that need to have raw
133 * encrypted data extracted as soon as the whole blob has been read into
135 struct list_head encrypted_dentries;
137 /* Number of files for which we didn't have permission to set the full
138 * security descriptor. */
139 unsigned long partial_security_descriptors;
141 /* Number of files for which we didn't have permission to set any part
142 * of the security descriptor. */
143 unsigned long no_security_descriptors;
145 /* Number of files for which we couldn't set the short name. */
146 unsigned long num_set_short_name_failures;
148 /* Number of files for which we couldn't remove the short name. */
149 unsigned long num_remove_short_name_failures;
151 /* Number of files on which we couldn't set System Compression. */
152 unsigned long num_system_compression_failures;
154 /* The number of files which, for compatibility with the Windows
155 * bootloader, were not compressed using the requested system
156 * compression format. This includes matches with the hardcoded pattern
157 * list only; it does not include matches with patterns in
158 * [PrepopulateList]. */
159 unsigned long num_system_compression_exclusions;
161 /* The Windows build number of the image being applied, or 0 if unknown.
163 u64 windows_build_number;
165 /* Have we tried to enable short name support on the target volume yet?
167 bool tried_to_enable_short_names;
170 /* Get the drive letter from a Windows path, or return the null character if the
171 * path is relative. */
173 get_drive_letter(const wchar_t *path)
175 /* Skip \\?\ prefix */
176 if (!wcsncmp(path, L"\\\\?\\", 4))
179 /* Return drive letter if valid */
180 if (((path[0] >= L'a' && path[0] <= L'z') ||
181 (path[0] >= L'A' && path[0] <= L'Z')) && path[1] == L':')
188 get_vol_flags(const wchar_t *target, DWORD *vol_flags_ret,
189 bool *short_names_supported_ret)
191 wchar_t filesystem_name[MAX_PATH + 1];
193 wchar_t *volume = NULL;
196 *short_names_supported_ret = false;
198 drive[0] = get_drive_letter(target);
206 if (!GetVolumeInformation(volume, NULL, 0, NULL, NULL,
207 vol_flags_ret, filesystem_name,
208 ARRAY_LEN(filesystem_name)))
210 win32_warning(GetLastError(),
211 L"Failed to get volume information for \"%ls\"",
216 if (wcsstr(filesystem_name, L"NTFS")) {
217 /* FILE_SUPPORTS_HARD_LINKS is only supported on Windows 7 and
218 * later. Force it on anyway if filesystem is NTFS. */
219 *vol_flags_ret |= FILE_SUPPORTS_HARD_LINKS;
221 /* There's no volume flag for short names, but according to the
222 * MS documentation they are only user-settable on NTFS. */
223 *short_names_supported_ret = true;
227 /* Is the image being extracted an OS image for Windows 10 or later? */
229 is_image_windows_10_or_later(struct win32_apply_ctx *ctx)
231 /* Note: if no build number is available, this returns false. */
232 return ctx->windows_build_number >= 10240;
235 static const wchar_t *
236 current_path(struct win32_apply_ctx *ctx);
239 build_extraction_path(const struct wim_dentry *dentry,
240 struct win32_apply_ctx *ctx);
243 report_dentry_apply_error(const struct wim_dentry *dentry,
244 struct win32_apply_ctx *ctx, int ret)
246 build_extraction_path(dentry, ctx);
247 return report_apply_error(&ctx->common, ret, current_path(ctx));
251 check_apply_error(const struct wim_dentry *dentry,
252 struct win32_apply_ctx *ctx, int ret)
255 ret = report_dentry_apply_error(dentry, ctx, ret);
260 win32_get_supported_features(const wchar_t *target,
261 struct wim_features *supported_features)
264 bool short_names_supported;
266 /* Query the features of the target volume. */
268 get_vol_flags(target, &vol_flags, &short_names_supported);
270 supported_features->archive_files = 1;
271 supported_features->hidden_files = 1;
272 supported_features->system_files = 1;
274 if (vol_flags & FILE_FILE_COMPRESSION)
275 supported_features->compressed_files = 1;
277 if (vol_flags & FILE_SUPPORTS_ENCRYPTION) {
278 supported_features->encrypted_files = 1;
279 supported_features->encrypted_directories = 1;
282 supported_features->not_context_indexed_files = 1;
284 /* Don't do anything with FILE_SUPPORTS_SPARSE_FILES. */
286 if (vol_flags & FILE_NAMED_STREAMS)
287 supported_features->named_data_streams = 1;
289 if (vol_flags & FILE_SUPPORTS_HARD_LINKS)
290 supported_features->hard_links = 1;
292 if (vol_flags & FILE_SUPPORTS_REPARSE_POINTS)
293 supported_features->reparse_points = 1;
295 if (vol_flags & FILE_PERSISTENT_ACLS)
296 supported_features->security_descriptors = 1;
298 if (short_names_supported)
299 supported_features->short_names = 1;
301 supported_features->timestamps = 1;
303 /* Note: Windows does not support case sensitive filenames! At least
304 * not without changing the registry and rebooting... */
309 #define COMPACT_FLAGS (WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS4K | \
310 WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS8K | \
311 WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS16K | \
312 WIMLIB_EXTRACT_FLAG_COMPACT_LZX)
317 * If not done already, load the patterns from the [PrepopulateList] section of
318 * WimBootCompress.ini in the WIM image being extracted.
320 * Note: WimBootCompress.ini applies to both types of "external backing":
322 * - WIM backing ("WIMBoot" - Windows 8.1 and later)
323 * - File backing ("System Compression" - Windows 10 and later)
326 load_prepopulate_pats(struct win32_apply_ctx *ctx)
328 const wchar_t *path = L"\\Windows\\System32\\WimBootCompress.ini";
329 struct wim_dentry *dentry;
330 const struct blob_descriptor *blob;
333 struct string_set *s;
335 struct text_file_section sec;
337 if (ctx->tried_to_load_prepopulate_list)
340 ctx->tried_to_load_prepopulate_list = true;
342 dentry = get_dentry(ctx->common.wim, path, WIMLIB_CASE_INSENSITIVE);
344 (dentry->d_inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
345 FILE_ATTRIBUTE_REPARSE_POINT |
346 FILE_ATTRIBUTE_ENCRYPTED)) ||
347 !(blob = inode_get_blob_for_unnamed_data_stream(dentry->d_inode,
348 ctx->common.wim->blob_table)))
350 WARNING("%ls does not exist in the WIM image.\n"
351 " The default configuration will be used instead; it assumes that all\n"
352 " files are valid for external backing regardless of path, equivalent\n"
353 " to an empty [PrepopulateList] section.", path);
354 return WIMLIB_ERR_PATH_DOES_NOT_EXIST;
357 ret = read_blob_into_alloc_buf(blob, &buf);
361 s = CALLOC(1, sizeof(struct string_set));
364 return WIMLIB_ERR_NOMEM;
367 sec.name = T("PrepopulateList");
370 ret = do_load_text_file(path, buf, blob->size, &mem, &sec, 1,
371 LOAD_TEXT_FILE_REMOVE_QUOTES |
372 LOAD_TEXT_FILE_NO_WARNINGS,
374 STATIC_ASSERT(OS_PREFERRED_PATH_SEPARATOR == WIM_PATH_SEPARATOR);
380 ctx->prepopulate_pats = s;
381 ctx->mem_prepopulate_pats = mem;
385 /* Returns %true if the specified absolute path to a file in the WIM image can
386 * be subject to external backing when extracted. Otherwise returns %false. */
388 can_externally_back_path(const wchar_t *path, const struct win32_apply_ctx *ctx)
390 /* Does the path match a pattern given in the [PrepopulateList] section
391 * of WimBootCompress.ini? */
392 if (ctx->prepopulate_pats && match_pattern_list(path, ctx->prepopulate_pats))
395 /* Since we attempt to modify the SYSTEM registry after it's extracted
396 * (see end_wimboot_extraction()), it can't be extracted as externally
397 * backed. This extends to associated files such as SYSTEM.LOG that
398 * also must be writable in order to write to the registry. Normally,
399 * SYSTEM is in [PrepopulateList], and the SYSTEM.* files match patterns
400 * in [ExclusionList] and therefore are not captured in the WIM at all.
401 * However, a WIM that wasn't specifically captured in "WIMBoot mode"
402 * may contain SYSTEM.* files. So to make things "just work", hard-code
404 if (match_path(path, L"\\Windows\\System32\\config\\SYSTEM*", false))
410 /* Can the specified WIM resource be used as the source of an external backing
411 * for the wof.sys WIM provider? */
413 is_resource_valid_for_external_backing(const struct wim_resource_descriptor *rdesc,
414 struct win32_apply_ctx *ctx)
416 /* Must be the original WIM file format. This check excludes pipable
417 * resources and solid resources. It also excludes other resources
418 * contained in such files even if they would be otherwise compatible.
420 if (rdesc->wim->hdr.magic != WIM_MAGIC ||
421 rdesc->wim->hdr.wim_version != WIM_VERSION_DEFAULT)
423 ctx->wimboot.have_wrong_version_wims = true;
428 * Whitelist of compression types and chunk sizes supported by
429 * Microsoft's WOF driver.
432 * - Uncompressed WIMs result in BSOD. However, this only applies to
433 * the WIM file itself, not to uncompressed resources in a WIM file
434 * that is otherwise compressed.
435 * - XPRESS 64K sometimes appears to work, but sometimes it causes
436 * reads to fail with STATUS_UNSUCCESSFUL.
438 switch (rdesc->compression_type) {
439 case WIMLIB_COMPRESSION_TYPE_NONE:
440 if (rdesc->wim->compression_type == WIMLIB_COMPRESSION_TYPE_NONE) {
441 ctx->wimboot.have_uncompressed_wims = true;
445 case WIMLIB_COMPRESSION_TYPE_XPRESS:
446 switch (rdesc->chunk_size) {
453 ctx->wimboot.have_unsupported_compressed_resources = true;
457 case WIMLIB_COMPRESSION_TYPE_LZX:
458 switch (rdesc->chunk_size) {
462 ctx->wimboot.have_unsupported_compressed_resources = true;
467 ctx->wimboot.have_unsupported_compressed_resources = true;
471 /* Microsoft's WoF driver errors out if it tries to satisfy a read with
472 * ending offset >= 4 GiB from an externally backed file. */
473 if (rdesc->uncompressed_size > 4200000000) {
474 ctx->wimboot.have_huge_resources = true;
481 #define EXTERNAL_BACKING_NOT_ENABLED -1
482 #define EXTERNAL_BACKING_NOT_POSSIBLE -2
483 #define EXTERNAL_BACKING_EXCLUDED -3
486 * Determines whether the specified file will be externally backed. Returns a
487 * negative status code if no, 0 if yes, or a positive wimlib error code on
488 * error. If the file is excluded from external backing based on its path, then
489 * *excluded_dentry_ret is set to the dentry for the path that matched the
492 * Note that this logic applies to both types of "external backing":
494 * - WIM backing ("WIMBoot" - Windows 8.1 and later)
495 * - File backing ("System Compression" - Windows 10 and later)
497 * However, in the case of WIM backing we also need to validate that the WIM
498 * resource that would be the source of the backing is supported by the wof.sys
502 will_externally_back_inode(struct wim_inode *inode, struct win32_apply_ctx *ctx,
503 const struct wim_dentry **excluded_dentry_ret,
506 struct wim_dentry *dentry;
507 struct blob_descriptor *blob;
510 if (load_prepopulate_pats(ctx) == WIMLIB_ERR_NOMEM)
511 return WIMLIB_ERR_NOMEM;
513 if (inode->i_can_externally_back)
516 /* This may do redundant checks because the cached value
517 * i_can_externally_back is 2-state (as opposed to 3-state:
518 * unknown/no/yes). But most files can be externally backed, so this
521 if (inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
522 FILE_ATTRIBUTE_REPARSE_POINT |
523 FILE_ATTRIBUTE_ENCRYPTED))
524 return EXTERNAL_BACKING_NOT_POSSIBLE;
526 blob = inode_get_blob_for_unnamed_data_stream_resolved(inode);
529 return EXTERNAL_BACKING_NOT_POSSIBLE;
532 (blob->blob_location != BLOB_IN_WIM ||
533 !is_resource_valid_for_external_backing(blob->rdesc, ctx)))
534 return EXTERNAL_BACKING_NOT_POSSIBLE;
537 * We need to check the patterns in [PrepopulateList] against every name
538 * of the inode, in case any of them match.
541 inode_for_each_extraction_alias(dentry, inode) {
543 ret = calculate_dentry_full_path(dentry);
547 if (!can_externally_back_path(dentry->d_full_path, ctx)) {
548 if (excluded_dentry_ret)
549 *excluded_dentry_ret = dentry;
550 return EXTERNAL_BACKING_EXCLUDED;
554 inode->i_can_externally_back = 1;
559 * Determines if the unnamed data stream of a file will be created as a WIM
560 * external backing (a "WIMBoot pointer file"), as opposed to a standard
564 win32_will_back_from_wim(struct wim_dentry *dentry, struct apply_ctx *_ctx)
566 struct win32_apply_ctx *ctx = (struct win32_apply_ctx *)_ctx;
568 if (!(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT))
569 return EXTERNAL_BACKING_NOT_ENABLED;
571 return will_externally_back_inode(dentry->d_inode, ctx, NULL, true);
574 /* Find the WOF registration information for the specified WIM file. */
575 static struct wimboot_wim *
576 find_wimboot_wim(WIMStruct *wim_to_find, struct win32_apply_ctx *ctx)
578 for (size_t i = 0; i < ctx->wimboot.num_wims; i++)
579 if (wim_to_find == ctx->wimboot.wims[i].wim)
580 return &ctx->wimboot.wims[i];
587 set_backed_from_wim(HANDLE h, struct wim_inode *inode, struct win32_apply_ctx *ctx)
590 const struct wim_dentry *excluded_dentry;
591 const struct blob_descriptor *blob;
592 const struct wimboot_wim *wimboot_wim;
594 ret = will_externally_back_inode(inode, ctx, &excluded_dentry, true);
595 if (ret > 0) /* Error. */
598 if (ret < 0 && ret != EXTERNAL_BACKING_EXCLUDED)
599 return 0; /* Not externally backing, other than due to exclusion. */
601 if (unlikely(ret == EXTERNAL_BACKING_EXCLUDED)) {
602 /* Not externally backing due to exclusion. */
603 union wimlib_progress_info info;
605 build_extraction_path(excluded_dentry, ctx);
607 info.wimboot_exclude.path_in_wim = excluded_dentry->d_full_path;
608 info.wimboot_exclude.extraction_path = current_path(ctx);
610 return call_progress(ctx->common.progfunc,
611 WIMLIB_PROGRESS_MSG_WIMBOOT_EXCLUDE,
612 &info, ctx->common.progctx);
615 /* Externally backing. */
617 blob = inode_get_blob_for_unnamed_data_stream_resolved(inode);
618 wimboot_wim = find_wimboot_wim(blob->rdesc->wim, ctx);
620 if (unlikely(!wimboot_set_pointer(h,
622 wimboot_wim->data_source_id,
623 wimboot_wim->blob_table_hash,
624 ctx->wimboot.wof_running)))
626 const DWORD err = GetLastError();
628 build_extraction_path(inode_first_extraction_dentry(inode), ctx);
629 win32_error(err, L"\"%ls\": Couldn't set WIMBoot pointer data",
631 return WIMLIB_ERR_WIMBOOT;
636 /* Calculates the SHA-1 message digest of the WIM's blob table. */
638 hash_blob_table(WIMStruct *wim, u8 hash[SHA1_HASH_SIZE])
640 return wim_reshdr_to_hash(&wim->hdr.blob_table_reshdr, wim, hash);
644 register_wim_with_wof(WIMStruct *wim, struct win32_apply_ctx *ctx)
646 struct wimboot_wim *p;
649 /* Check if already registered */
650 for (size_t i = 0; i < ctx->wimboot.num_wims; i++)
651 if (wim == ctx->wimboot.wims[i].wim)
654 /* Not yet registered */
656 p = REALLOC(ctx->wimboot.wims,
657 (ctx->wimboot.num_wims + 1) * sizeof(ctx->wimboot.wims[0]));
659 return WIMLIB_ERR_NOMEM;
660 ctx->wimboot.wims = p;
662 ctx->wimboot.wims[ctx->wimboot.num_wims].wim = wim;
664 ret = hash_blob_table(wim, ctx->wimboot.wims[ctx->wimboot.num_wims].blob_table_hash);
668 ret = wimboot_alloc_data_source_id(wim->filename,
670 ctx->common.wim->current_image,
672 &ctx->wimboot.wims[ctx->wimboot.num_wims].data_source_id,
673 &ctx->wimboot.wof_running);
677 ctx->wimboot.num_wims++;
681 /* Prepare for doing a "WIMBoot" extraction by registering each source WIM file
682 * with WOF on the target volume. */
684 start_wimboot_extraction(struct list_head *dentry_list, struct win32_apply_ctx *ctx)
687 struct wim_dentry *dentry;
689 if (!xml_get_wimboot(ctx->common.wim->xml_info,
690 ctx->common.wim->current_image))
691 WARNING("The WIM image is not marked as WIMBoot compatible. This usually\n"
692 " means it is not intended to be used to back a Windows operating\n"
693 " system. Proceeding anyway.");
695 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
696 struct blob_descriptor *blob;
698 ret = win32_will_back_from_wim(dentry, &ctx->common);
699 if (ret > 0) /* Error */
701 if (ret < 0) /* Won't externally back */
704 blob = inode_get_blob_for_unnamed_data_stream_resolved(dentry->d_inode);
705 ret = register_wim_with_wof(blob->rdesc->wim, ctx);
710 if (ctx->wimboot.have_wrong_version_wims) {
711 WARNING("At least one of the source WIM files uses a version of the WIM\n"
712 " file format that not supported by Microsoft's wof.sys driver.\n"
713 " Files whose data is contained in one of these WIM files will be\n"
714 " extracted as full files rather than externally backed.");
717 if (ctx->wimboot.have_uncompressed_wims) {
718 WARNING("At least one of the source WIM files is uncompressed. Files whose\n"
719 " data is contained in an uncompressed WIM file will be extracted as\n"
720 " full files rather than externally backed, since uncompressed WIM\n"
721 " files are not supported by Microsoft's wof.sys driver.");
724 if (ctx->wimboot.have_unsupported_compressed_resources) {
725 WARNING("At least one of the source WIM files uses a compression format that\n"
726 " is not supported by Microsoft's wof.sys driver. Files whose data is\n"
727 " contained in a compressed resource in one of these WIM files will be\n"
728 " extracted as full files rather than externally backed. (The\n"
729 " compression formats supported by wof.sys are: XPRESS 4K, XPRESS 8K,\n"
730 " XPRESS 16K, XPRESS 32K, and LZX 32K.)");
733 if (ctx->wimboot.have_huge_resources) {
734 WARNING("Some files exceeded 4.2 GB in size. Such files will be extracted\n"
735 " as full files rather than externally backed, since very large files\n"
736 " are not supported by Microsoft's wof.sys driver.");
743 build_win32_extraction_path(const struct wim_dentry *dentry,
744 struct win32_apply_ctx *ctx);
746 /* Sets WimBoot=1 in the extracted SYSTEM registry hive.
748 * WIMGAPI does this, and it's possible that it's important.
749 * But I don't know exactly what this value means to Windows. */
751 end_wimboot_extraction(struct win32_apply_ctx *ctx)
753 struct wim_dentry *dentry;
754 wchar_t subkeyname[32];
760 dentry = get_dentry(ctx->common.wim, L"\\Windows\\System32\\config\\SYSTEM",
761 WIMLIB_CASE_INSENSITIVE);
763 if (!dentry || !will_extract_dentry(dentry))
766 if (!will_extract_dentry(wim_get_current_root_dentry(ctx->common.wim)))
769 /* Not bothering to use the native routines (e.g. NtLoadKey()) for this.
770 * If this doesn't work, you probably also have many other problems. */
772 build_win32_extraction_path(dentry, ctx);
774 randomize_char_array_with_alnum(subkeyname, 20);
775 subkeyname[20] = L'\0';
777 res = RegLoadKey(HKEY_LOCAL_MACHINE, subkeyname, ctx->pathbuf.Buffer);
781 wcscpy(&subkeyname[20], L"\\Setup");
783 res = RegCreateKeyEx(HKEY_LOCAL_MACHINE, subkeyname, 0, NULL,
784 REG_OPTION_BACKUP_RESTORE, 0, NULL, &key, NULL);
790 res = RegSetValueEx(key, L"WimBoot", 0, REG_DWORD,
791 (const BYTE *)&value, sizeof(DWORD));
795 res = RegFlushKey(key);
798 res2 = RegCloseKey(key);
802 subkeyname[20] = L'\0';
803 RegUnLoadKey(HKEY_LOCAL_MACHINE, subkeyname);
807 win32_warning(res, L"Failed to set \\Setup: dword \"WimBoot\"=1 "
808 "value in registry hive \"%ls\"",
809 ctx->pathbuf.Buffer);
815 /* Returns the number of wide characters needed to represent the path to the
816 * specified @dentry, relative to the target directory, when extracted.
818 * Does not include null terminator (not needed for NtCreateFile). */
820 dentry_extraction_path_length(const struct wim_dentry *dentry)
823 const struct wim_dentry *d;
827 len += d->d_extraction_name_nchars + 1;
829 } while (!dentry_is_root(d) && will_extract_dentry(d));
831 return --len; /* No leading slash */
834 /* Returns the length of the longest string that might need to be appended to
835 * the path to an alias of an inode to open or create a named data stream.
837 * If the inode has no named data streams, this will be 0. Otherwise, this will
838 * be 1 plus the length of the longest-named data stream, since the data stream
839 * name must be separated from the path by the ':' character. */
841 inode_longest_named_data_stream_spec(const struct wim_inode *inode)
844 for (unsigned i = 0; i < inode->i_num_streams; i++) {
845 const struct wim_inode_stream *strm = &inode->i_streams[i];
846 if (!stream_is_named_data_stream(strm))
848 size_t len = utf16le_len_chars(strm->stream_name);
857 /* Find the length, in wide characters, of the longest path needed for
858 * extraction of any file in @dentry_list relative to the target directory.
860 * Accounts for named data streams, but does not include null terminator (not
861 * needed for NtCreateFile). */
863 compute_path_max(struct list_head *dentry_list)
866 const struct wim_dentry *dentry;
868 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
871 len = dentry_extraction_path_length(dentry);
873 /* Account for named data streams */
874 len += inode_longest_named_data_stream_spec(dentry->d_inode);
883 /* Build the path at which to extract the @dentry, relative to the target
886 * The path is saved in ctx->pathbuf. */
888 build_extraction_path(const struct wim_dentry *dentry,
889 struct win32_apply_ctx *ctx)
893 const struct wim_dentry *d;
895 len = dentry_extraction_path_length(dentry);
897 ctx->pathbuf.Length = len * sizeof(wchar_t);
898 p = ctx->pathbuf.Buffer + len;
900 !dentry_is_root(d->d_parent) && will_extract_dentry(d->d_parent);
903 p -= d->d_extraction_name_nchars;
904 wmemcpy(p, d->d_extraction_name, d->d_extraction_name_nchars);
907 /* No leading slash */
908 p -= d->d_extraction_name_nchars;
909 wmemcpy(p, d->d_extraction_name, d->d_extraction_name_nchars);
912 /* Build the path at which to extract the @dentry, relative to the target
913 * directory, adding the suffix for a named data stream.
915 * The path is saved in ctx->pathbuf. */
917 build_extraction_path_with_ads(const struct wim_dentry *dentry,
918 struct win32_apply_ctx *ctx,
919 const wchar_t *stream_name,
920 size_t stream_name_nchars)
924 build_extraction_path(dentry, ctx);
926 /* Add :NAME for named data stream */
927 p = ctx->pathbuf.Buffer + (ctx->pathbuf.Length / sizeof(wchar_t));
929 wmemcpy(p, stream_name, stream_name_nchars);
930 ctx->pathbuf.Length += (1 + stream_name_nchars) * sizeof(wchar_t);
933 /* Build the Win32 namespace path to the specified @dentry when extracted.
935 * The path is saved in ctx->pathbuf and will be null terminated.
937 * XXX: We could get rid of this if it wasn't needed for the file encryption
938 * APIs, and the registry manipulation in WIMBoot mode. */
940 build_win32_extraction_path(const struct wim_dentry *dentry,
941 struct win32_apply_ctx *ctx)
943 build_extraction_path(dentry, ctx);
945 /* Prepend target_ntpath to our relative path, then change \??\ into \\?\ */
947 memmove(ctx->pathbuf.Buffer +
948 (ctx->target_ntpath.Length / sizeof(wchar_t)) + 1,
949 ctx->pathbuf.Buffer, ctx->pathbuf.Length);
950 memcpy(ctx->pathbuf.Buffer, ctx->target_ntpath.Buffer,
951 ctx->target_ntpath.Length);
952 ctx->pathbuf.Buffer[ctx->target_ntpath.Length / sizeof(wchar_t)] = L'\\';
953 ctx->pathbuf.Length += ctx->target_ntpath.Length + sizeof(wchar_t);
954 ctx->pathbuf.Buffer[ctx->pathbuf.Length / sizeof(wchar_t)] = L'\0';
956 wimlib_assert(ctx->pathbuf.Length >= 4 * sizeof(wchar_t) &&
957 !wmemcmp(ctx->pathbuf.Buffer, L"\\??\\", 4));
959 ctx->pathbuf.Buffer[1] = L'\\';
963 /* Returns a "printable" representation of the last relative NT path that was
964 * constructed with build_extraction_path() or build_extraction_path_with_ads().
966 * This will be overwritten by the next call to this function. */
967 static const wchar_t *
968 current_path(struct win32_apply_ctx *ctx)
970 wchar_t *p = ctx->print_buffer;
972 p = wmempcpy(p, ctx->common.target, ctx->common.target_nchars);
974 p = wmempcpy(p, ctx->pathbuf.Buffer, ctx->pathbuf.Length / sizeof(wchar_t));
976 return ctx->print_buffer;
979 /* Open handle to the target directory if it is not already open. If the target
980 * directory does not exist, this creates it. */
982 open_target_directory(struct win32_apply_ctx *ctx)
989 ctx->attr.Length = sizeof(ctx->attr);
990 ctx->attr.RootDirectory = NULL;
991 ctx->attr.ObjectName = &ctx->target_ntpath;
992 status = (*func_NtCreateFile)(&ctx->h_target,
998 FILE_SHARE_VALID_FLAGS,
1000 FILE_DIRECTORY_FILE |
1001 FILE_OPEN_REPARSE_POINT |
1002 FILE_OPEN_FOR_BACKUP_INTENT,
1005 if (!NT_SUCCESS(status)) {
1006 winnt_error(status, L"Can't open or create directory \"%ls\"",
1007 ctx->common.target);
1008 return WIMLIB_ERR_OPENDIR;
1010 ctx->attr.RootDirectory = ctx->h_target;
1011 ctx->attr.ObjectName = &ctx->pathbuf;
1016 close_target_directory(struct win32_apply_ctx *ctx)
1018 if (ctx->h_target) {
1019 (*func_NtClose)(ctx->h_target);
1020 ctx->h_target = NULL;
1021 ctx->attr.RootDirectory = NULL;
1026 * Ensures the target directory exists and opens a handle to it, in preparation
1027 * of using paths relative to it.
1030 prepare_target(struct list_head *dentry_list, struct win32_apply_ctx *ctx)
1035 ret = win32_path_to_nt_path(ctx->common.target, &ctx->target_ntpath);
1039 ret = open_target_directory(ctx);
1043 path_max = compute_path_max(dentry_list);
1044 /* Add some extra for building Win32 paths for the file encryption APIs,
1045 * and ensure we have at least enough to potentially use a 8.3 name for
1046 * the last component. */
1047 path_max += max(2 + (ctx->target_ntpath.Length / sizeof(wchar_t)),
1050 ctx->pathbuf.MaximumLength = path_max * sizeof(wchar_t);
1051 ctx->pathbuf.Buffer = MALLOC(ctx->pathbuf.MaximumLength);
1052 if (!ctx->pathbuf.Buffer)
1053 return WIMLIB_ERR_NOMEM;
1055 ctx->print_buffer = MALLOC((ctx->common.target_nchars + 1 + path_max + 1) *
1057 if (!ctx->print_buffer)
1058 return WIMLIB_ERR_NOMEM;
1063 /* When creating an inode that will have a short (DOS) name, we create it using
1064 * the long name associated with the short name. This ensures that the short
1065 * name gets associated with the correct long name. */
1066 static struct wim_dentry *
1067 first_extraction_alias(const struct wim_inode *inode)
1069 struct wim_dentry *dentry;
1071 inode_for_each_extraction_alias(dentry, inode)
1072 if (dentry_has_short_name(dentry))
1074 return inode_first_extraction_dentry(inode);
1078 * Set or clear FILE_ATTRIBUTE_COMPRESSED if the inherited value is different
1079 * from the desired value.
1081 * Note that you can NOT override the inherited value of
1082 * FILE_ATTRIBUTE_COMPRESSED directly with NtCreateFile().
1085 adjust_compression_attribute(HANDLE h, const struct wim_dentry *dentry,
1086 struct win32_apply_ctx *ctx)
1088 const bool compressed = (dentry->d_inode->i_attributes &
1089 FILE_ATTRIBUTE_COMPRESSED);
1091 if (ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES)
1094 if (!ctx->common.supported_features.compressed_files)
1097 FILE_BASIC_INFORMATION info;
1099 USHORT compression_state;
1101 /* Get current attributes */
1102 status = (*func_NtQueryInformationFile)(h, &ctx->iosb,
1103 &info, sizeof(info),
1104 FileBasicInformation);
1105 if (NT_SUCCESS(status) &&
1106 compressed == !!(info.FileAttributes & FILE_ATTRIBUTE_COMPRESSED))
1108 /* Nothing needs to be done. */
1112 /* Set the new compression state */
1115 compression_state = COMPRESSION_FORMAT_DEFAULT;
1117 compression_state = COMPRESSION_FORMAT_NONE;
1119 status = (*func_NtFsControlFile)(h,
1124 FSCTL_SET_COMPRESSION,
1129 if (NT_SUCCESS(status))
1132 winnt_error(status, L"Can't %s compression attribute on \"%ls\"",
1133 (compressed ? "set" : "clear"), current_path(ctx));
1134 return WIMLIB_ERR_SET_ATTRIBUTES;
1137 /* Try to enable short name support on the target volume. If successful, return
1138 * true. If unsuccessful, issue a warning and return false. */
1140 try_to_enable_short_names(const wchar_t *volume)
1143 FILE_FS_PERSISTENT_VOLUME_INFORMATION info;
1145 DWORD bytesReturned;
1147 h = CreateFile(volume, GENERIC_WRITE,
1148 FILE_SHARE_VALID_FLAGS, NULL, OPEN_EXISTING,
1149 FILE_FLAG_BACKUP_SEMANTICS, NULL);
1150 if (h == INVALID_HANDLE_VALUE)
1153 info.VolumeFlags = 0;
1154 info.FlagMask = PERSISTENT_VOLUME_STATE_SHORT_NAME_CREATION_DISABLED;
1158 bret = DeviceIoControl(h, FSCTL_SET_PERSISTENT_VOLUME_STATE,
1159 &info, sizeof(info), NULL, 0,
1160 &bytesReturned, NULL);
1169 win32_warning(GetLastError(),
1170 L"Failed to enable short name support on %ls",
1176 remove_conflicting_short_name(const struct wim_dentry *dentry, struct win32_apply_ctx *ctx)
1182 size_t bufsize = offsetof(FILE_NAME_INFORMATION, FileName) +
1183 (13 * sizeof(wchar_t));
1184 u8 buf[bufsize] _aligned_attribute(8);
1185 bool retried = false;
1186 FILE_NAME_INFORMATION *info = (FILE_NAME_INFORMATION *)buf;
1188 memset(buf, 0, bufsize);
1190 /* Build the path with the short name. */
1191 name = &ctx->pathbuf.Buffer[ctx->pathbuf.Length / sizeof(wchar_t)];
1192 while (name != ctx->pathbuf.Buffer && *(name - 1) != L'\\')
1194 end = mempcpy(name, dentry->d_short_name, dentry->d_short_name_nbytes);
1195 ctx->pathbuf.Length = ((u8 *)end - (u8 *)ctx->pathbuf.Buffer);
1197 /* Open the conflicting file (by short name). */
1198 status = (*func_NtOpenFile)(&h, GENERIC_WRITE | DELETE,
1199 &ctx->attr, &ctx->iosb,
1200 FILE_SHARE_VALID_FLAGS,
1201 FILE_OPEN_REPARSE_POINT | FILE_OPEN_FOR_BACKUP_INTENT);
1202 if (!NT_SUCCESS(status)) {
1203 winnt_warning(status, L"Can't open \"%ls\"", current_path(ctx));
1208 WARNING("Overriding conflicting short name; path=\"%ls\"",
1212 /* Try to remove the short name on the conflicting file. */
1215 status = (*func_NtSetInformationFile)(h, &ctx->iosb, info, bufsize,
1216 FileShortNameInformation);
1218 if (status == STATUS_INVALID_PARAMETER && !retried) {
1220 /* Microsoft forgot to make it possible to remove short names
1221 * until Windows 7. Oops. Use a random short name instead. */
1223 info->FileNameLength = 12 * sizeof(wchar_t);
1224 for (int i = 0; i < 8; i++)
1225 info->FileName[i] = 'A' + (rand() % 26);
1226 info->FileName[8] = L'.';
1227 info->FileName[9] = L'W';
1228 info->FileName[10] = L'L';
1229 info->FileName[11] = L'B';
1230 info->FileName[12] = L'\0';
1236 build_extraction_path(dentry, ctx);
1240 /* Set the short name on the open file @h which has been created at the location
1241 * indicated by @dentry.
1243 * Note that this may add, change, or remove the short name.
1245 * @h must be opened with DELETE access.
1247 * Returns 0 or WIMLIB_ERR_SET_SHORT_NAME. The latter only happens in
1248 * STRICT_SHORT_NAMES mode.
1251 set_short_name(HANDLE h, const struct wim_dentry *dentry,
1252 struct win32_apply_ctx *ctx)
1255 if (!ctx->common.supported_features.short_names)
1259 * Note: The size of the FILE_NAME_INFORMATION buffer must be such that
1260 * FileName contains at least 2 wide characters (4 bytes). Otherwise,
1261 * NtSetInformationFile() will return STATUS_INFO_LENGTH_MISMATCH. This
1262 * is despite the fact that FileNameLength can validly be 0 or 2 bytes,
1263 * with the former case being removing the existing short name if
1264 * present, rather than setting one.
1266 * The null terminator is seemingly optional, but to be safe we include
1267 * space for it and zero all unused space.
1270 size_t bufsize = offsetof(FILE_NAME_INFORMATION, FileName) +
1271 max(dentry->d_short_name_nbytes, sizeof(wchar_t)) +
1273 u8 buf[bufsize] _aligned_attribute(8);
1274 FILE_NAME_INFORMATION *info = (FILE_NAME_INFORMATION *)buf;
1276 bool tried_to_remove_existing = false;
1278 memset(buf, 0, bufsize);
1280 info->FileNameLength = dentry->d_short_name_nbytes;
1281 memcpy(info->FileName, dentry->d_short_name, dentry->d_short_name_nbytes);
1284 status = (*func_NtSetInformationFile)(h, &ctx->iosb, info, bufsize,
1285 FileShortNameInformation);
1286 if (NT_SUCCESS(status))
1289 if (status == STATUS_SHORT_NAMES_NOT_ENABLED_ON_VOLUME) {
1290 if (dentry->d_short_name_nbytes == 0)
1292 if (!ctx->tried_to_enable_short_names) {
1296 ctx->tried_to_enable_short_names = true;
1298 ret = win32_get_drive_path(ctx->common.target,
1302 if (try_to_enable_short_names(volume))
1308 * Short names can conflict in several cases:
1310 * - a file being extracted has a short name conflicting with an
1313 * - a file being extracted has a short name conflicting with another
1314 * file being extracted (possible, but shouldn't happen)
1316 * - a file being extracted has a short name that conflicts with the
1317 * automatically generated short name of a file we previously
1318 * extracted, but failed to set the short name for. Sounds unlikely,
1319 * but this actually does happen fairly often on versions of Windows
1320 * prior to Windows 7 because they do not support removing short names
1323 if (unlikely(status == STATUS_OBJECT_NAME_COLLISION) &&
1324 dentry->d_short_name_nbytes && !tried_to_remove_existing)
1326 tried_to_remove_existing = true;
1327 status = remove_conflicting_short_name(dentry, ctx);
1328 if (NT_SUCCESS(status))
1332 /* By default, failure to set short names is not an error (since short
1333 * names aren't too important anymore...). */
1334 if (!(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SHORT_NAMES)) {
1335 if (dentry->d_short_name_nbytes)
1336 ctx->num_set_short_name_failures++;
1338 ctx->num_remove_short_name_failures++;
1342 winnt_error(status, L"Can't set short name on \"%ls\"", current_path(ctx));
1343 return WIMLIB_ERR_SET_SHORT_NAME;
1347 * A wrapper around NtCreateFile() to make it slightly more usable...
1348 * This uses the path currently constructed in ctx->pathbuf.
1350 * Also, we always specify FILE_OPEN_FOR_BACKUP_INTENT and
1351 * FILE_OPEN_REPARSE_POINT.
1354 do_create_file(PHANDLE FileHandle,
1355 ACCESS_MASK DesiredAccess,
1356 PLARGE_INTEGER AllocationSize,
1357 ULONG FileAttributes,
1358 ULONG CreateDisposition,
1359 ULONG CreateOptions,
1360 struct win32_apply_ctx *ctx)
1362 return (*func_NtCreateFile)(FileHandle,
1368 FILE_SHARE_VALID_FLAGS,
1371 FILE_OPEN_FOR_BACKUP_INTENT |
1372 FILE_OPEN_REPARSE_POINT,
1377 /* Like do_create_file(), but builds the extraction path of the @dentry first.
1380 create_file(PHANDLE FileHandle,
1381 ACCESS_MASK DesiredAccess,
1382 PLARGE_INTEGER AllocationSize,
1383 ULONG FileAttributes,
1384 ULONG CreateDisposition,
1385 ULONG CreateOptions,
1386 const struct wim_dentry *dentry,
1387 struct win32_apply_ctx *ctx)
1389 build_extraction_path(dentry, ctx);
1390 return do_create_file(FileHandle,
1400 delete_file_or_stream(struct win32_apply_ctx *ctx)
1404 FILE_DISPOSITION_INFORMATION disposition_info;
1405 FILE_BASIC_INFORMATION basic_info;
1406 bool retried = false;
1408 status = do_create_file(&h,
1413 FILE_NON_DIRECTORY_FILE,
1415 if (unlikely(!NT_SUCCESS(status))) {
1416 winnt_error(status, L"Can't open \"%ls\" for deletion",
1418 return WIMLIB_ERR_OPEN;
1422 disposition_info.DoDeleteFile = TRUE;
1423 status = (*func_NtSetInformationFile)(h, &ctx->iosb,
1425 sizeof(disposition_info),
1426 FileDispositionInformation);
1428 if (likely(NT_SUCCESS(status)))
1431 if (status == STATUS_CANNOT_DELETE && !retried) {
1432 /* Clear file attributes and try again. This is necessary for
1433 * FILE_ATTRIBUTE_READONLY files. */
1434 status = do_create_file(&h,
1435 FILE_WRITE_ATTRIBUTES | DELETE,
1439 FILE_NON_DIRECTORY_FILE,
1441 if (!NT_SUCCESS(status)) {
1443 L"Can't open \"%ls\" to reset attributes",
1445 return WIMLIB_ERR_OPEN;
1447 memset(&basic_info, 0, sizeof(basic_info));
1448 basic_info.FileAttributes = FILE_ATTRIBUTE_NORMAL;
1449 status = (*func_NtSetInformationFile)(h, &ctx->iosb,
1452 FileBasicInformation);
1453 if (!NT_SUCCESS(status)) {
1455 L"Can't reset file attributes on \"%ls\"",
1458 return WIMLIB_ERR_SET_ATTRIBUTES;
1463 winnt_error(status, L"Can't delete \"%ls\"", current_path(ctx));
1464 return WIMLIB_ERR_OPEN;
1468 * Create a nondirectory file or named data stream at the current path,
1469 * superseding any that already exists at that path. If successful, return an
1470 * open handle to the file or named data stream.
1473 supersede_file_or_stream(struct win32_apply_ctx *ctx, HANDLE *h_ret)
1476 bool retried = false;
1478 /* FILE_ATTRIBUTE_SYSTEM is needed to ensure that
1479 * FILE_ATTRIBUTE_ENCRYPTED doesn't get set before we want it to be. */
1481 status = do_create_file(h_ret,
1482 GENERIC_READ | GENERIC_WRITE | DELETE,
1484 FILE_ATTRIBUTE_SYSTEM,
1486 FILE_NON_DIRECTORY_FILE,
1488 if (likely(NT_SUCCESS(status)))
1491 /* STATUS_OBJECT_NAME_COLLISION means that the file or stream already
1492 * exists. Delete the existing file or stream, then try again.
1494 * Note: we don't use FILE_OVERWRITE_IF or FILE_SUPERSEDE because of
1495 * problems with certain file attributes, especially
1496 * FILE_ATTRIBUTE_ENCRYPTED. FILE_SUPERSEDE is also broken in the
1497 * Windows PE ramdisk. */
1498 if (status == STATUS_OBJECT_NAME_COLLISION && !retried) {
1499 int ret = delete_file_or_stream(ctx);
1505 winnt_error(status, L"Can't create \"%ls\"", current_path(ctx));
1506 return WIMLIB_ERR_OPEN;
1509 /* Set the reparse point @rpbuf of length @rpbuflen on the extracted file
1510 * corresponding to the WIM dentry @dentry. */
1512 do_set_reparse_point(const struct wim_dentry *dentry,
1513 const struct reparse_buffer_disk *rpbuf, u16 rpbuflen,
1514 struct win32_apply_ctx *ctx)
1519 status = create_file(&h, GENERIC_WRITE, NULL,
1520 0, FILE_OPEN, 0, dentry, ctx);
1521 if (!NT_SUCCESS(status))
1524 status = (*func_NtFsControlFile)(h, NULL, NULL, NULL,
1525 &ctx->iosb, FSCTL_SET_REPARSE_POINT,
1526 (void *)rpbuf, rpbuflen,
1530 if (NT_SUCCESS(status))
1533 /* On Windows, by default only the Administrator can create symbolic
1534 * links for some reason. By default we just issue a warning if this
1535 * appears to be the problem. Use WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS
1536 * to get a hard error. */
1537 if (!(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS)
1538 && (status == STATUS_PRIVILEGE_NOT_HELD ||
1539 status == STATUS_ACCESS_DENIED)
1540 && (dentry->d_inode->i_reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
1541 dentry->d_inode->i_reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT))
1543 WARNING("Can't create symbolic link \"%ls\"! \n"
1544 " (Need Administrator rights, or at least "
1546 " SeCreateSymbolicLink privilege.)",
1552 winnt_error(status, L"Can't set reparse data on \"%ls\"",
1554 return WIMLIB_ERR_SET_REPARSE_DATA;
1558 * Create empty named data streams and potentially a reparse point for the
1559 * specified file, if any.
1561 * Since these won't have blob descriptors, they won't show up in the call to
1562 * extract_blob_list(). Hence the need for the special case.
1565 create_empty_streams(const struct wim_dentry *dentry,
1566 struct win32_apply_ctx *ctx)
1568 const struct wim_inode *inode = dentry->d_inode;
1571 for (unsigned i = 0; i < inode->i_num_streams; i++) {
1572 const struct wim_inode_stream *strm = &inode->i_streams[i];
1574 if (stream_blob_resolved(strm) != NULL)
1577 if (strm->stream_type == STREAM_TYPE_REPARSE_POINT &&
1578 ctx->common.supported_features.reparse_points)
1580 u8 buf[REPARSE_DATA_OFFSET] _aligned_attribute(8);
1581 struct reparse_buffer_disk *rpbuf =
1582 (struct reparse_buffer_disk *)buf;
1583 complete_reparse_point(rpbuf, inode, 0);
1584 ret = do_set_reparse_point(dentry, rpbuf,
1585 REPARSE_DATA_OFFSET, ctx);
1588 } else if (stream_is_named_data_stream(strm) &&
1589 ctx->common.supported_features.named_data_streams)
1593 build_extraction_path_with_ads(dentry, ctx,
1595 utf16le_len_chars(strm->stream_name));
1596 ret = supersede_file_or_stream(ctx, &h);
1598 build_extraction_path(dentry, ctx);
1610 * Creates the directory named by @dentry, or uses an existing directory at that
1611 * location. If necessary, sets the short name and/or fixes compression and
1612 * encryption attributes.
1614 * Returns 0, WIMLIB_ERR_MKDIR, or WIMLIB_ERR_SET_SHORT_NAME.
1617 create_directory(const struct wim_dentry *dentry, struct win32_apply_ctx *ctx)
1624 /* DELETE is needed for set_short_name(); GENERIC_READ and GENERIC_WRITE
1625 * are needed for adjust_compression_attribute(). */
1626 perms = GENERIC_READ | GENERIC_WRITE;
1627 if (!dentry_is_root(dentry))
1630 /* FILE_ATTRIBUTE_SYSTEM is needed to ensure that
1631 * FILE_ATTRIBUTE_ENCRYPTED doesn't get set before we want it to be. */
1632 status = create_file(&h, perms, NULL, FILE_ATTRIBUTE_SYSTEM,
1633 FILE_OPEN_IF, FILE_DIRECTORY_FILE, dentry, ctx);
1634 if (!NT_SUCCESS(status)) {
1635 winnt_error(status, L"Can't create directory \"%ls\"",
1637 return WIMLIB_ERR_MKDIR;
1640 if (ctx->iosb.Information == FILE_OPENED) {
1641 /* If we opened an existing directory, try to clear its file
1642 * attributes. As far as I know, this only actually makes a
1643 * difference in the case where a FILE_ATTRIBUTE_READONLY
1644 * directory has a named data stream which needs to be
1645 * extracted. You cannot create a named data stream of such a
1646 * directory, even though this contradicts Microsoft's
1647 * documentation for FILE_ATTRIBUTE_READONLY which states it is
1648 * not honored for directories! */
1649 FILE_BASIC_INFORMATION basic_info = { .FileAttributes = FILE_ATTRIBUTE_NORMAL };
1650 (*func_NtSetInformationFile)(h, &ctx->iosb, &basic_info,
1651 sizeof(basic_info), FileBasicInformation);
1654 if (!dentry_is_root(dentry)) {
1655 ret = set_short_name(h, dentry, ctx);
1660 ret = adjust_compression_attribute(h, dentry, ctx);
1667 * Create all the directories being extracted, other than the target directory
1670 * Note: we don't honor directory hard links. However, we don't allow them to
1671 * exist in WIM images anyway (see inode_fixup.c).
1674 create_directories(struct list_head *dentry_list,
1675 struct win32_apply_ctx *ctx)
1677 const struct wim_dentry *dentry;
1680 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
1682 if (!(dentry->d_inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY))
1685 /* Note: Here we include files with
1686 * FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_REPARSE_POINT, but we
1687 * wait until later to actually set the reparse data. */
1689 ret = create_directory(dentry, ctx);
1692 ret = create_empty_streams(dentry, ctx);
1694 ret = check_apply_error(dentry, ctx, ret);
1698 ret = report_file_created(&ctx->common);
1706 * Creates the nondirectory file named by @dentry.
1708 * On success, returns an open handle to the file in @h_ret, with GENERIC_READ,
1709 * GENERIC_WRITE, and DELETE access. Also, the path to the file will be saved
1710 * in ctx->pathbuf. On failure, returns an error code.
1713 create_nondirectory_inode(HANDLE *h_ret, const struct wim_dentry *dentry,
1714 struct win32_apply_ctx *ctx)
1719 build_extraction_path(dentry, ctx);
1721 ret = supersede_file_or_stream(ctx, &h);
1725 ret = adjust_compression_attribute(h, dentry, ctx);
1729 ret = create_empty_streams(dentry, ctx);
1742 /* Creates a hard link at the location named by @dentry to the file represented
1743 * by the open handle @h. Or, if the target volume does not support hard links,
1744 * create a separate file instead. */
1746 create_link(HANDLE h, const struct wim_dentry *dentry,
1747 struct win32_apply_ctx *ctx)
1749 if (ctx->common.supported_features.hard_links) {
1751 build_extraction_path(dentry, ctx);
1753 size_t bufsize = offsetof(FILE_LINK_INFORMATION, FileName) +
1754 ctx->pathbuf.Length + sizeof(wchar_t);
1755 u8 buf[bufsize] _aligned_attribute(8);
1756 FILE_LINK_INFORMATION *info = (FILE_LINK_INFORMATION *)buf;
1759 info->ReplaceIfExists = TRUE;
1760 info->RootDirectory = ctx->attr.RootDirectory;
1761 info->FileNameLength = ctx->pathbuf.Length;
1762 memcpy(info->FileName, ctx->pathbuf.Buffer, ctx->pathbuf.Length);
1763 info->FileName[info->FileNameLength / 2] = L'\0';
1765 /* Note: the null terminator isn't actually necessary,
1766 * but if you don't add the extra character, you get
1767 * STATUS_INFO_LENGTH_MISMATCH when FileNameLength
1768 * happens to be 2 */
1770 status = (*func_NtSetInformationFile)(h, &ctx->iosb,
1772 FileLinkInformation);
1773 if (NT_SUCCESS(status))
1775 winnt_error(status, L"Failed to create link \"%ls\"",
1777 return WIMLIB_ERR_LINK;
1782 ret = create_nondirectory_inode(&h2, dentry, ctx);
1786 (*func_NtClose)(h2);
1791 /* Given an inode (represented by the open handle @h) for which one link has
1792 * been created (named by @first_dentry), create the other links.
1794 * Or, if the target volume does not support hard links, create separate files.
1796 * Note: This uses ctx->pathbuf and does not reset it.
1799 create_links(HANDLE h, const struct wim_dentry *first_dentry,
1800 struct win32_apply_ctx *ctx)
1802 const struct wim_inode *inode = first_dentry->d_inode;
1803 const struct wim_dentry *dentry;
1806 inode_for_each_extraction_alias(dentry, inode) {
1807 if (dentry != first_dentry) {
1808 ret = create_link(h, dentry, ctx);
1816 /* Create a nondirectory file, including all links. */
1818 create_nondirectory(struct wim_inode *inode, struct win32_apply_ctx *ctx)
1820 struct wim_dentry *first_dentry;
1824 first_dentry = first_extraction_alias(inode);
1826 /* Create first link. */
1827 ret = create_nondirectory_inode(&h, first_dentry, ctx);
1831 /* Set short name. */
1832 ret = set_short_name(h, first_dentry, ctx);
1834 /* Create additional links, OR if hard links are not supported just
1835 * create more files. */
1837 ret = create_links(h, first_dentry, ctx);
1839 /* "WIMBoot" extraction: set external backing by the WIM file if needed. */
1840 if (!ret && unlikely(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT))
1841 ret = set_backed_from_wim(h, inode, ctx);
1847 /* Create all the nondirectory files being extracted, including all aliases
1850 create_nondirectories(struct list_head *dentry_list, struct win32_apply_ctx *ctx)
1852 struct wim_dentry *dentry;
1853 struct wim_inode *inode;
1856 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
1857 inode = dentry->d_inode;
1858 if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY)
1860 /* Call create_nondirectory() only once per inode */
1861 if (dentry == inode_first_extraction_dentry(inode)) {
1862 ret = create_nondirectory(inode, ctx);
1863 ret = check_apply_error(dentry, ctx, ret);
1867 ret = report_file_created(&ctx->common);
1875 close_handles(struct win32_apply_ctx *ctx)
1877 for (unsigned i = 0; i < ctx->num_open_handles; i++)
1878 (*func_NtClose)(ctx->open_handles[i]);
1881 /* Prepare to read the next blob, which has size @blob_size, into an in-memory
1884 prepare_data_buffer(struct win32_apply_ctx *ctx, u64 blob_size)
1886 if (blob_size > ctx->data_buffer_size) {
1887 /* Larger buffer needed. */
1889 if ((size_t)blob_size != blob_size)
1891 new_buffer = REALLOC(ctx->data_buffer, blob_size);
1894 ctx->data_buffer = new_buffer;
1895 ctx->data_buffer_size = blob_size;
1897 /* On the first call this changes data_buffer_ptr from NULL, which tells
1898 * extract_chunk() that the data buffer needs to be filled while reading
1899 * the stream data. */
1900 ctx->data_buffer_ptr = ctx->data_buffer;
1905 begin_extract_blob_instance(const struct blob_descriptor *blob,
1906 struct wim_dentry *dentry,
1907 const struct wim_inode_stream *strm,
1908 struct win32_apply_ctx *ctx)
1910 FILE_ALLOCATION_INFORMATION alloc_info;
1914 if (unlikely(strm->stream_type == STREAM_TYPE_REPARSE_POINT)) {
1915 /* We can't write the reparse point stream directly; we must set
1916 * it with FSCTL_SET_REPARSE_POINT, which requires that all the
1917 * data be available. So, stage the data in a buffer. */
1918 if (!prepare_data_buffer(ctx, blob->size))
1919 return WIMLIB_ERR_NOMEM;
1920 list_add_tail(&dentry->d_tmp_list, &ctx->reparse_dentries);
1924 if (unlikely(strm->stream_type == STREAM_TYPE_EFSRPC_RAW_DATA)) {
1925 /* We can't write encrypted files directly; we must use
1926 * WriteEncryptedFileRaw(), which requires providing the data
1927 * through a callback function. This can't easily be combined
1928 * with our own callback-based approach.
1930 * The current workaround is to simply read the blob into memory
1931 * and write the encrypted file from that.
1933 * TODO: This isn't sufficient for extremely large encrypted
1934 * files. Perhaps we should create an extra thread to write
1936 if (!prepare_data_buffer(ctx, blob->size))
1937 return WIMLIB_ERR_NOMEM;
1938 list_add_tail(&dentry->d_tmp_list, &ctx->encrypted_dentries);
1942 /* It's a data stream (may be unnamed or named). */
1943 wimlib_assert(strm->stream_type == STREAM_TYPE_DATA);
1945 if (ctx->num_open_handles == MAX_OPEN_FILES) {
1946 /* XXX: Fix this. But because of the checks in
1947 * extract_blob_list(), this can now only happen on a filesystem
1948 * that does not support hard links. */
1949 ERROR("Can't extract data: too many open files!");
1950 return WIMLIB_ERR_UNSUPPORTED;
1954 if (unlikely(stream_is_named(strm))) {
1955 build_extraction_path_with_ads(dentry, ctx,
1957 utf16le_len_chars(strm->stream_name));
1959 build_extraction_path(dentry, ctx);
1963 /* Open a new handle */
1964 status = do_create_file(&h,
1965 FILE_WRITE_DATA | SYNCHRONIZE,
1966 NULL, 0, FILE_OPEN_IF,
1967 FILE_SEQUENTIAL_ONLY |
1968 FILE_SYNCHRONOUS_IO_NONALERT,
1970 if (!NT_SUCCESS(status)) {
1971 winnt_error(status, L"Can't open \"%ls\" for writing",
1973 return WIMLIB_ERR_OPEN;
1976 ctx->open_handles[ctx->num_open_handles++] = h;
1978 /* Allocate space for the data. */
1979 alloc_info.AllocationSize.QuadPart = blob->size;
1980 (*func_NtSetInformationFile)(h, &ctx->iosb,
1981 &alloc_info, sizeof(alloc_info),
1982 FileAllocationInformation);
1986 /* Given a Windows NT namespace path, such as \??\e:\Windows\System32, return a
1987 * pointer to the suffix of the path that begins with the device directly, such
1988 * as e:\Windows\System32. */
1989 static const wchar_t *
1990 skip_nt_toplevel_component(const wchar_t *path, size_t path_nchars)
1992 static const wchar_t * const dirs[] = {
1997 const wchar_t * const end = path + path_nchars;
1999 for (size_t i = 0; i < ARRAY_LEN(dirs); i++) {
2000 size_t len = wcslen(dirs[i]);
2001 if (len <= (end - path) && !wmemcmp(path, dirs[i], len)) {
2003 while (path != end && *path == L'\\')
2012 * Given a Windows NT namespace path, such as \??\e:\Windows\System32, return a
2013 * pointer to the suffix of the path that is device-relative but possibly with
2014 * leading slashes, such as \Windows\System32.
2016 * The path has an explicit length and is not necessarily null terminated.
2018 static const wchar_t *
2019 get_device_relative_path(const wchar_t *path, size_t path_nchars)
2021 const wchar_t * const orig_path = path;
2022 const wchar_t * const end = path + path_nchars;
2024 path = skip_nt_toplevel_component(path, path_nchars);
2025 if (path == orig_path)
2028 while (path != end && *path != L'\\')
2035 * Given a reparse point buffer for an inode for which the absolute link target
2036 * was relativized when it was archived, de-relative the link target to be
2037 * consistent with the actual extraction location.
2040 try_rpfix(struct reparse_buffer_disk *rpbuf, u16 *rpbuflen_p,
2041 struct win32_apply_ctx *ctx)
2043 struct link_reparse_point link;
2044 size_t orig_subst_name_nchars;
2045 const wchar_t *relpath;
2046 size_t relpath_nchars;
2047 size_t target_ntpath_nchars;
2048 size_t fixed_subst_name_nchars;
2049 const wchar_t *fixed_print_name;
2050 size_t fixed_print_name_nchars;
2052 /* Do nothing if the reparse data is invalid. */
2053 if (parse_link_reparse_point(rpbuf, *rpbuflen_p, &link))
2056 /* Do nothing if the reparse point is a relative symbolic link. */
2057 if (link_is_relative_symlink(&link))
2060 /* Build the new substitute name from the NT namespace path to the
2061 * target directory, then a path separator, then the "device relative"
2062 * part of the old substitute name. */
2064 orig_subst_name_nchars = link.substitute_name_nbytes / sizeof(wchar_t);
2066 relpath = get_device_relative_path(link.substitute_name,
2067 orig_subst_name_nchars);
2068 relpath_nchars = orig_subst_name_nchars -
2069 (relpath - link.substitute_name);
2071 target_ntpath_nchars = ctx->target_ntpath.Length / sizeof(wchar_t);
2073 fixed_subst_name_nchars = target_ntpath_nchars + relpath_nchars;
2075 wchar_t fixed_subst_name[fixed_subst_name_nchars];
2077 wmemcpy(fixed_subst_name, ctx->target_ntpath.Buffer, target_ntpath_nchars);
2078 wmemcpy(&fixed_subst_name[target_ntpath_nchars], relpath, relpath_nchars);
2079 /* Doesn't need to be null-terminated. */
2081 /* Print name should be Win32, but not all NT names can even be
2082 * translated to Win32 names. But we can at least delete the top-level
2083 * directory, such as \??\, and this will have the expected result in
2084 * the usual case. */
2085 fixed_print_name = skip_nt_toplevel_component(fixed_subst_name,
2086 fixed_subst_name_nchars);
2087 fixed_print_name_nchars = fixed_subst_name_nchars - (fixed_print_name -
2090 link.substitute_name = fixed_subst_name;
2091 link.substitute_name_nbytes = fixed_subst_name_nchars * sizeof(wchar_t);
2092 link.print_name = (wchar_t *)fixed_print_name;
2093 link.print_name_nbytes = fixed_print_name_nchars * sizeof(wchar_t);
2094 make_link_reparse_point(&link, rpbuf, rpbuflen_p);
2097 /* Sets the reparse point on the specified file. This handles "fixing" the
2098 * targets of absolute symbolic links and junctions if WIMLIB_EXTRACT_FLAG_RPFIX
2101 set_reparse_point(const struct wim_dentry *dentry,
2102 const struct reparse_buffer_disk *rpbuf, u16 rpbuflen,
2103 struct win32_apply_ctx *ctx)
2105 if ((ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX)
2106 && !(dentry->d_inode->i_rp_flags & WIM_RP_FLAG_NOT_FIXED))
2108 memcpy(&ctx->rpfixbuf, rpbuf, rpbuflen);
2109 try_rpfix(&ctx->rpfixbuf, &rpbuflen, ctx);
2110 rpbuf = &ctx->rpfixbuf;
2112 return do_set_reparse_point(dentry, rpbuf, rpbuflen, ctx);
2116 /* Import the next block of raw encrypted data */
2118 import_encrypted_data(PBYTE pbData, PVOID pvCallbackContext, PULONG Length)
2120 struct win32_apply_ctx *ctx = pvCallbackContext;
2123 copy_len = min(ctx->encrypted_size - ctx->encrypted_offset, *Length);
2124 memcpy(pbData, &ctx->data_buffer[ctx->encrypted_offset], copy_len);
2125 ctx->encrypted_offset += copy_len;
2127 return ERROR_SUCCESS;
2131 * Write the raw encrypted data to the already-created file (or directory)
2132 * corresponding to @dentry.
2134 * The raw encrypted data is provided in ctx->data_buffer, and its size is
2135 * ctx->encrypted_size.
2137 * This function may close the target directory, in which case the caller needs
2138 * to re-open it if needed.
2141 extract_encrypted_file(const struct wim_dentry *dentry,
2142 struct win32_apply_ctx *ctx)
2149 /* Temporarily build a Win32 path for OpenEncryptedFileRaw() */
2150 build_win32_extraction_path(dentry, ctx);
2152 flags = CREATE_FOR_IMPORT | OVERWRITE_HIDDEN;
2153 if (dentry->d_inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY)
2154 flags |= CREATE_FOR_DIR;
2158 err = OpenEncryptedFileRaw(ctx->pathbuf.Buffer, flags, &rawctx);
2159 if (err == ERROR_SHARING_VIOLATION && !retried) {
2160 /* This can be caused by the handle we have open to the target
2161 * directory. Try closing it temporarily. */
2162 close_target_directory(ctx);
2167 /* Restore the NT namespace path */
2168 build_extraction_path(dentry, ctx);
2170 if (err != ERROR_SUCCESS) {
2171 win32_error(err, L"Can't open \"%ls\" for encrypted import",
2173 return WIMLIB_ERR_OPEN;
2176 ctx->encrypted_offset = 0;
2178 err = WriteEncryptedFileRaw(import_encrypted_data, ctx, rawctx);
2180 CloseEncryptedFileRaw(rawctx);
2182 if (err != ERROR_SUCCESS) {
2183 win32_error(err, L"Can't import encrypted file \"%ls\"",
2185 return WIMLIB_ERR_WRITE;
2191 /* Called when starting to read a blob for extraction on Windows */
2193 begin_extract_blob(struct blob_descriptor *blob, void *_ctx)
2195 struct win32_apply_ctx *ctx = _ctx;
2196 const struct blob_extraction_target *targets = blob_extraction_targets(blob);
2199 ctx->num_open_handles = 0;
2200 ctx->data_buffer_ptr = NULL;
2201 INIT_LIST_HEAD(&ctx->reparse_dentries);
2202 INIT_LIST_HEAD(&ctx->encrypted_dentries);
2204 for (u32 i = 0; i < blob->out_refcnt; i++) {
2205 const struct wim_inode *inode = targets[i].inode;
2206 const struct wim_inode_stream *strm = targets[i].stream;
2207 struct wim_dentry *dentry;
2209 /* A copy of the blob needs to be extracted to @inode. */
2211 if (ctx->common.supported_features.hard_links) {
2212 dentry = inode_first_extraction_dentry(inode);
2213 ret = begin_extract_blob_instance(blob, dentry, strm, ctx);
2214 ret = check_apply_error(dentry, ctx, ret);
2218 /* Hard links not supported. Extract the blob
2219 * separately to each alias of the inode. */
2220 inode_for_each_extraction_alias(dentry, inode) {
2221 ret = begin_extract_blob_instance(blob, dentry, strm, ctx);
2222 ret = check_apply_error(dentry, ctx, ret);
2236 /* Called when the next chunk of a blob has been read for extraction on Windows
2239 extract_chunk(const void *chunk, size_t size, void *_ctx)
2241 struct win32_apply_ctx *ctx = _ctx;
2243 /* Write the data chunk to each open handle */
2244 for (unsigned i = 0; i < ctx->num_open_handles; i++) {
2245 u8 *bufptr = (u8 *)chunk;
2246 size_t bytes_remaining = size;
2248 while (bytes_remaining) {
2249 ULONG count = min(0xFFFFFFFF, bytes_remaining);
2251 status = (*func_NtWriteFile)(ctx->open_handles[i],
2253 &ctx->iosb, bufptr, count,
2255 if (!NT_SUCCESS(status)) {
2256 winnt_error(status, L"Error writing data to target volume");
2257 return WIMLIB_ERR_WRITE;
2259 bufptr += ctx->iosb.Information;
2260 bytes_remaining -= ctx->iosb.Information;
2264 /* Copy the data chunk into the buffer (if needed) */
2265 if (ctx->data_buffer_ptr)
2266 ctx->data_buffer_ptr = mempcpy(ctx->data_buffer_ptr,
2272 get_system_compression_format(int extract_flags)
2274 if (extract_flags & WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS4K)
2275 return FILE_PROVIDER_COMPRESSION_FORMAT_XPRESS4K;
2277 if (extract_flags & WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS8K)
2278 return FILE_PROVIDER_COMPRESSION_FORMAT_XPRESS8K;
2280 if (extract_flags & WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS16K)
2281 return FILE_PROVIDER_COMPRESSION_FORMAT_XPRESS16K;
2283 return FILE_PROVIDER_COMPRESSION_FORMAT_LZX;
2287 static const wchar_t *
2288 get_system_compression_format_string(int format)
2291 case FILE_PROVIDER_COMPRESSION_FORMAT_XPRESS4K:
2293 case FILE_PROVIDER_COMPRESSION_FORMAT_XPRESS8K:
2295 case FILE_PROVIDER_COMPRESSION_FORMAT_XPRESS16K:
2296 return L"XPRESS16K";
2303 set_system_compression(HANDLE h, int format)
2306 IO_STATUS_BLOCK iosb;
2308 struct wof_external_info wof_info;
2309 struct file_provider_external_info file_info;
2312 .version = WOF_CURRENT_VERSION,
2313 .provider = WOF_PROVIDER_FILE,
2316 .version = FILE_PROVIDER_CURRENT_VERSION,
2317 .compression_format = format,
2321 /* We intentionally use NtFsControlFile() rather than DeviceIoControl()
2322 * here because the "compressing this object would not save space"
2323 * status code does not map to a valid Win32 error code on older
2324 * versions of Windows (before Windows 10?). This can be a problem if
2325 * the WOFADK driver is being used rather than the regular WOF, since
2326 * WOFADK can be used on older versions of Windows. */
2327 status = (*func_NtFsControlFile)(h, NULL, NULL, NULL, &iosb,
2328 FSCTL_SET_EXTERNAL_BACKING,
2329 &in, sizeof(in), NULL, 0);
2331 if (status == 0xC000046F) /* "Compressing this object would not save space." */
2332 return STATUS_SUCCESS;
2337 /* Hard-coded list of files which the Windows bootloader may need to access
2338 * before the WOF driver has been loaded. */
2339 static wchar_t *bootloader_pattern_strings[] = {
2342 L"\\Windows\\AppPatch\\drvmain.sdb",
2343 L"\\Windows\\Boot\\DVD\\*",
2344 L"\\Windows\\Boot\\EFI\\*",
2345 L"\\Windows\\bootstat.dat",
2346 L"\\Windows\\Fonts\\vgaoem.fon",
2347 L"\\Windows\\Fonts\\vgasys.fon",
2348 L"\\Windows\\INF\\errata.inf",
2349 L"\\Windows\\System32\\config\\*",
2350 L"\\Windows\\System32\\ntkrnlpa.exe",
2351 L"\\Windows\\System32\\ntoskrnl.exe",
2352 L"\\Windows\\System32\\bootvid.dll",
2353 L"\\Windows\\System32\\ci.dll",
2354 L"\\Windows\\System32\\hal*.dll",
2355 L"\\Windows\\System32\\mcupdate_AuthenticAMD.dll",
2356 L"\\Windows\\System32\\mcupdate_GenuineIntel.dll",
2357 L"\\Windows\\System32\\pshed.dll",
2358 L"\\Windows\\System32\\apisetschema.dll",
2359 L"\\Windows\\System32\\api-ms-win*.dll",
2360 L"\\Windows\\System32\\ext-ms-win*.dll",
2361 L"\\Windows\\System32\\KernelBase.dll",
2362 L"\\Windows\\System32\\drivers\\*.sys",
2363 L"\\Windows\\System32\\*.nls",
2364 L"\\Windows\\System32\\kbd*.dll",
2365 L"\\Windows\\System32\\kd*.dll",
2366 L"\\Windows\\System32\\clfs.sys",
2367 L"\\Windows\\System32\\CodeIntegrity\\driver.stl",
2370 static const struct string_set bootloader_patterns = {
2371 .strings = bootloader_pattern_strings,
2372 .num_strings = ARRAY_LEN(bootloader_pattern_strings),
2376 set_system_compression_on_inode(struct wim_inode *inode, int format,
2377 struct win32_apply_ctx *ctx)
2379 bool retried = false;
2383 /* If it may be needed for compatibility with the Windows bootloader,
2384 * force this file to XPRESS4K or uncompressed format. The bootloader
2385 * of Windows 10 supports XPRESS4K only; older versions don't support
2386 * system compression at all. */
2387 if (!is_image_windows_10_or_later(ctx) ||
2388 format != FILE_PROVIDER_COMPRESSION_FORMAT_XPRESS4K)
2390 /* We need to check the patterns against every name of the
2391 * inode, in case any of them match. */
2392 struct wim_dentry *dentry;
2393 inode_for_each_extraction_alias(dentry, inode) {
2397 if (calculate_dentry_full_path(dentry)) {
2398 ERROR("Unable to compute file path!");
2399 return STATUS_NO_MEMORY;
2402 incompatible = match_pattern_list(dentry->d_full_path,
2403 &bootloader_patterns);
2404 FREE(dentry->d_full_path);
2405 dentry->d_full_path = NULL;
2410 warned = (ctx->num_system_compression_exclusions++ > 0);
2412 if (is_image_windows_10_or_later(ctx)) {
2413 /* Force to XPRESS4K */
2415 WARNING("For compatibility with the "
2416 "Windows bootloader, some "
2419 "using the XPRESS4K format "
2420 "instead of the %"TS" format\n"
2422 get_system_compression_format_string(format));
2424 format = FILE_PROVIDER_COMPRESSION_FORMAT_XPRESS4K;
2427 /* Force to uncompressed */
2429 WARNING("For compatibility with the "
2430 "Windows bootloader, some "
2432 " be compressed with"
2433 " system compression "
2434 "(\"compacted\").");
2436 return STATUS_SUCCESS;
2442 /* Open the extracted file. */
2443 status = create_file(&h, GENERIC_READ | GENERIC_WRITE, NULL,
2445 inode_first_extraction_dentry(inode), ctx);
2447 if (!NT_SUCCESS(status))
2450 /* Compress the file. If the attempt fails with "invalid device
2451 * request", then attach wof.sys (or wofadk.sys) and retry. */
2452 status = set_system_compression(h, format);
2453 if (unlikely(status == STATUS_INVALID_DEVICE_REQUEST && !retried)) {
2454 wchar_t drive_path[7];
2455 if (!win32_get_drive_path(ctx->common.target, drive_path) &&
2456 win32_try_to_attach_wof(drive_path + 4)) {
2467 * This function is called when doing a "compact-mode" extraction and we just
2468 * finished extracting a blob to one or more locations. For each location that
2469 * was the unnamed data stream of a file, this function compresses the
2470 * corresponding file using System Compression, if allowed.
2472 * Note: we're doing the compression immediately after extracting the data
2473 * rather than during a separate compression pass. This way should be faster
2474 * since the operating system should still have the file's data cached.
2476 * Note: we're having the operating system do the compression, which is not
2477 * ideal because wimlib could create the compressed data faster and more
2478 * efficiently (the compressed data format is identical to a WIM resource). But
2479 * we seemingly don't have a choice because WOF prevents applications from
2480 * creating its reparse points.
2483 handle_system_compression(struct blob_descriptor *blob, struct win32_apply_ctx *ctx)
2485 const struct blob_extraction_target *targets = blob_extraction_targets(blob);
2487 const int format = get_system_compression_format(ctx->common.extract_flags);
2489 for (u32 i = 0; i < blob->out_refcnt; i++) {
2490 struct wim_inode *inode = targets[i].inode;
2491 struct wim_inode_stream *strm = targets[i].stream;
2494 if (!stream_is_unnamed_data_stream(strm))
2497 if (will_externally_back_inode(inode, ctx, NULL, false) != 0)
2500 status = set_system_compression_on_inode(inode, format, ctx);
2501 if (likely(NT_SUCCESS(status)))
2504 if (status == STATUS_INVALID_DEVICE_REQUEST) {
2506 "The request to compress the extracted files using System Compression\n"
2507 " will not be honored because the operating system or target volume\n"
2508 " does not support it. System Compression is only supported on\n"
2509 " Windows 10 and later, and only on NTFS volumes.");
2510 ctx->common.extract_flags &= ~COMPACT_FLAGS;
2514 ctx->num_system_compression_failures++;
2515 if (ctx->num_system_compression_failures < 10) {
2516 winnt_warning(status, L"\"%ls\": Failed to compress "
2517 "extracted file using System Compression",
2519 } else if (ctx->num_system_compression_failures == 10) {
2520 WARNING("Suppressing further warnings about "
2521 "System Compression failures.");
2526 /* Called when a blob has been fully read for extraction on Windows */
2528 end_extract_blob(struct blob_descriptor *blob, int status, void *_ctx)
2530 struct win32_apply_ctx *ctx = _ctx;
2532 const struct wim_dentry *dentry;
2539 if (unlikely(ctx->common.extract_flags & COMPACT_FLAGS))
2540 handle_system_compression(blob, ctx);
2542 if (likely(!ctx->data_buffer_ptr))
2545 if (!list_empty(&ctx->reparse_dentries)) {
2546 if (blob->size > REPARSE_DATA_MAX_SIZE) {
2547 dentry = list_first_entry(&ctx->reparse_dentries,
2548 struct wim_dentry, d_tmp_list);
2549 build_extraction_path(dentry, ctx);
2550 ERROR("Reparse data of \"%ls\" has size "
2551 "%"PRIu64" bytes (exceeds %u bytes)",
2552 current_path(ctx), blob->size,
2553 REPARSE_DATA_MAX_SIZE);
2554 ret = WIMLIB_ERR_INVALID_REPARSE_DATA;
2555 return check_apply_error(dentry, ctx, ret);
2558 memcpy(ctx->rpbuf.rpdata, ctx->data_buffer, blob->size);
2560 list_for_each_entry(dentry, &ctx->reparse_dentries, d_tmp_list) {
2562 /* Reparse point header */
2563 complete_reparse_point(&ctx->rpbuf, dentry->d_inode,
2566 ret = set_reparse_point(dentry, &ctx->rpbuf,
2567 REPARSE_DATA_OFFSET + blob->size,
2569 ret = check_apply_error(dentry, ctx, ret);
2575 if (!list_empty(&ctx->encrypted_dentries)) {
2576 ctx->encrypted_size = blob->size;
2577 list_for_each_entry(dentry, &ctx->encrypted_dentries, d_tmp_list) {
2578 ret = extract_encrypted_file(dentry, ctx);
2579 ret = check_apply_error(dentry, ctx, ret);
2582 /* Re-open the target directory if needed. */
2583 ret = open_target_directory(ctx);
2592 /* Attributes that can't be set directly */
2593 #define SPECIAL_ATTRIBUTES \
2594 (FILE_ATTRIBUTE_REPARSE_POINT | \
2595 FILE_ATTRIBUTE_DIRECTORY | \
2596 FILE_ATTRIBUTE_ENCRYPTED | \
2597 FILE_ATTRIBUTE_SPARSE_FILE | \
2598 FILE_ATTRIBUTE_COMPRESSED)
2600 /* Set the security descriptor @desc, of @desc_size bytes, on the file with open
2603 set_security_descriptor(HANDLE h, const void *_desc,
2604 size_t desc_size, struct win32_apply_ctx *ctx)
2606 SECURITY_INFORMATION info;
2608 SECURITY_DESCRIPTOR_RELATIVE *desc;
2611 * Ideally, we would just pass in the security descriptor buffer as-is.
2612 * But it turns out that Windows can mess up the security descriptor
2613 * even when using the low-level NtSetSecurityObject() function:
2615 * - Windows will clear SE_DACL_AUTO_INHERITED if it is set in the
2616 * passed buffer. To actually get Windows to set
2617 * SE_DACL_AUTO_INHERITED, the application must set the non-persistent
2618 * flag SE_DACL_AUTO_INHERIT_REQ. As usual, Microsoft didn't bother
2619 * to properly document either of these flags. It's unclear how
2620 * important SE_DACL_AUTO_INHERITED actually is, but to be safe we use
2621 * the SE_DACL_AUTO_INHERIT_REQ workaround to set it if needed.
2623 * - The above also applies to the equivalent SACL flags,
2624 * SE_SACL_AUTO_INHERITED and SE_SACL_AUTO_INHERIT_REQ.
2626 * - If the application says that it's setting
2627 * DACL_SECURITY_INFORMATION, then Windows sets SE_DACL_PRESENT in the
2628 * resulting security descriptor, even if the security descriptor the
2629 * application provided did not have a DACL. This seems to be
2630 * unavoidable, since omitting DACL_SECURITY_INFORMATION would cause a
2631 * default DACL to remain. Fortunately, this behavior seems harmless,
2632 * since the resulting DACL will still be "null" --- but it will be
2633 * "the other representation of null".
2635 * - The above also applies to SACL_SECURITY_INFORMATION and
2636 * SE_SACL_PRESENT. Again, it's seemingly unavoidable but "harmless"
2637 * that Windows changes the representation of a "null SACL".
2639 if (likely(desc_size <= STACK_MAX)) {
2640 desc = alloca(desc_size);
2642 desc = MALLOC(desc_size);
2644 return STATUS_NO_MEMORY;
2647 memcpy(desc, _desc, desc_size);
2649 if (likely(desc_size >= 4)) {
2651 if (desc->Control & SE_DACL_AUTO_INHERITED)
2652 desc->Control |= SE_DACL_AUTO_INHERIT_REQ;
2654 if (desc->Control & SE_SACL_AUTO_INHERITED)
2655 desc->Control |= SE_SACL_AUTO_INHERIT_REQ;
2659 * More API insanity. We want to set the entire security descriptor
2660 * as-is. But all available APIs require specifying the specific parts
2661 * of the security descriptor being set. Especially annoying is that
2662 * mandatory integrity labels are part of the SACL, but they aren't set
2663 * with SACL_SECURITY_INFORMATION. Instead, applications must also
2664 * specify LABEL_SECURITY_INFORMATION (Windows Vista, Windows 7) or
2665 * BACKUP_SECURITY_INFORMATION (Windows 8). But at least older versions
2666 * of Windows don't error out if you provide these newer flags...
2668 * Also, if the process isn't running as Administrator, then it probably
2669 * doesn't have SE_RESTORE_PRIVILEGE. In this case, it will always get
2670 * the STATUS_PRIVILEGE_NOT_HELD error by trying to set the SACL, even
2671 * if the security descriptor it provided did not have a SACL. By
2672 * default, in this case we try to recover and set as much of the
2673 * security descriptor as possible --- potentially excluding the DACL, and
2674 * even the owner, as well as the SACL.
2677 info = OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION |
2678 DACL_SECURITY_INFORMATION | SACL_SECURITY_INFORMATION |
2679 LABEL_SECURITY_INFORMATION | BACKUP_SECURITY_INFORMATION;
2683 * It's also worth noting that SetFileSecurity() is unusable because it
2684 * doesn't request "backup semantics" when it opens the file internally.
2685 * NtSetSecurityObject() seems to be the best function to use in backup
2686 * applications. (SetSecurityInfo() should also work, but it's harder
2687 * to use and must call NtSetSecurityObject() internally anyway.
2688 * BackupWrite() is theoretically usable as well, but it's inflexible
2689 * and poorly documented.)
2693 status = (*func_NtSetSecurityObject)(h, info, desc);
2694 if (NT_SUCCESS(status))
2695 goto out_maybe_free_desc;
2697 /* Failed to set the requested parts of the security descriptor. If the
2698 * error was permissions-related, try to set fewer parts of the security
2699 * descriptor, unless WIMLIB_EXTRACT_FLAG_STRICT_ACLS is enabled. */
2700 if ((status == STATUS_PRIVILEGE_NOT_HELD ||
2701 status == STATUS_ACCESS_DENIED) &&
2702 !(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS))
2704 if (info & SACL_SECURITY_INFORMATION) {
2705 info &= ~(SACL_SECURITY_INFORMATION |
2706 LABEL_SECURITY_INFORMATION |
2707 BACKUP_SECURITY_INFORMATION);
2708 ctx->partial_security_descriptors++;
2711 if (info & DACL_SECURITY_INFORMATION) {
2712 info &= ~DACL_SECURITY_INFORMATION;
2715 if (info & OWNER_SECURITY_INFORMATION) {
2716 info &= ~OWNER_SECURITY_INFORMATION;
2719 /* Nothing left except GROUP, and if we removed it we
2720 * wouldn't have anything at all. */
2723 /* No part of the security descriptor could be set, or
2724 * WIMLIB_EXTRACT_FLAG_STRICT_ACLS is enabled and the full security
2725 * descriptor could not be set. */
2726 if (!(info & SACL_SECURITY_INFORMATION))
2727 ctx->partial_security_descriptors--;
2728 ctx->no_security_descriptors++;
2730 out_maybe_free_desc:
2731 if (unlikely(desc_size > STACK_MAX))
2736 /* Set metadata on the open file @h from the WIM inode @inode. */
2738 do_apply_metadata_to_file(HANDLE h, const struct wim_inode *inode,
2739 struct win32_apply_ctx *ctx)
2741 FILE_BASIC_INFORMATION info;
2744 /* Set security descriptor if present and not in NO_ACLS mode */
2745 if (inode_has_security_descriptor(inode) &&
2746 !(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS))
2748 const struct wim_security_data *sd;
2752 sd = wim_get_current_security_data(ctx->common.wim);
2753 desc = sd->descriptors[inode->i_security_id];
2754 desc_size = sd->sizes[inode->i_security_id];
2756 status = set_security_descriptor(h, desc, desc_size, ctx);
2757 if (!NT_SUCCESS(status) &&
2758 (ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS))
2761 L"Can't set security descriptor on \"%ls\"",
2763 return WIMLIB_ERR_SET_SECURITY;
2767 /* Set attributes and timestamps */
2768 info.CreationTime.QuadPart = inode->i_creation_time;
2769 info.LastAccessTime.QuadPart = inode->i_last_access_time;
2770 info.LastWriteTime.QuadPart = inode->i_last_write_time;
2771 info.ChangeTime.QuadPart = 0;
2772 if (ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES) {
2773 info.FileAttributes = FILE_ATTRIBUTE_NORMAL;
2775 info.FileAttributes = inode->i_attributes & ~SPECIAL_ATTRIBUTES;
2776 if (info.FileAttributes == 0)
2777 info.FileAttributes = FILE_ATTRIBUTE_NORMAL;
2780 status = (*func_NtSetInformationFile)(h, &ctx->iosb,
2781 &info, sizeof(info),
2782 FileBasicInformation);
2783 /* On FAT volumes we get STATUS_INVALID_PARAMETER if we try to set
2784 * attributes on the root directory. (Apparently because FAT doesn't
2785 * actually have a place to store those attributes!) */
2786 if (!NT_SUCCESS(status)
2787 && !(status == STATUS_INVALID_PARAMETER &&
2788 dentry_is_root(inode_first_extraction_dentry(inode))))
2790 winnt_error(status, L"Can't set basic metadata on \"%ls\"",
2792 return WIMLIB_ERR_SET_ATTRIBUTES;
2799 apply_metadata_to_file(const struct wim_dentry *dentry,
2800 struct win32_apply_ctx *ctx)
2802 const struct wim_inode *inode = dentry->d_inode;
2808 perms = FILE_WRITE_ATTRIBUTES | WRITE_DAC |
2809 WRITE_OWNER | ACCESS_SYSTEM_SECURITY;
2811 build_extraction_path(dentry, ctx);
2813 /* Open a handle with as many relevant permissions as possible. */
2814 while (!NT_SUCCESS(status = do_create_file(&h, perms, NULL,
2815 0, FILE_OPEN, 0, ctx)))
2817 if (status == STATUS_PRIVILEGE_NOT_HELD ||
2818 status == STATUS_ACCESS_DENIED)
2820 if (perms & ACCESS_SYSTEM_SECURITY) {
2821 perms &= ~ACCESS_SYSTEM_SECURITY;
2824 if (perms & WRITE_DAC) {
2825 perms &= ~WRITE_DAC;
2828 if (perms & WRITE_OWNER) {
2829 perms &= ~WRITE_OWNER;
2833 winnt_error(status, L"Can't open \"%ls\" to set metadata",
2835 return WIMLIB_ERR_OPEN;
2838 ret = do_apply_metadata_to_file(h, inode, ctx);
2846 apply_metadata(struct list_head *dentry_list, struct win32_apply_ctx *ctx)
2848 const struct wim_dentry *dentry;
2851 /* We go in reverse so that metadata is set on all a directory's
2852 * children before the directory itself. This avoids any potential
2853 * problems with attributes, timestamps, or security descriptors. */
2854 list_for_each_entry_reverse(dentry, dentry_list, d_extraction_list_node)
2856 ret = apply_metadata_to_file(dentry, ctx);
2857 ret = check_apply_error(dentry, ctx, ret);
2860 ret = report_file_metadata_applied(&ctx->common);
2867 /* Issue warnings about problems during the extraction for which warnings were
2868 * not already issued (due to the high number of potential warnings if we issued
2869 * them per-file). */
2871 do_warnings(const struct win32_apply_ctx *ctx)
2873 if (ctx->partial_security_descriptors == 0
2874 && ctx->no_security_descriptors == 0
2875 && ctx->num_set_short_name_failures == 0
2877 && ctx->num_remove_short_name_failures == 0
2882 WARNING("Extraction to \"%ls\" complete, but with one or more warnings:",
2883 ctx->common.target);
2884 if (ctx->num_set_short_name_failures) {
2885 WARNING("- Could not set short names on %lu files or directories",
2886 ctx->num_set_short_name_failures);
2889 if (ctx->num_remove_short_name_failures) {
2890 WARNING("- Could not remove short names on %lu files or directories"
2891 " (This is expected on Vista and earlier)",
2892 ctx->num_remove_short_name_failures);
2895 if (ctx->partial_security_descriptors) {
2896 WARNING("- Could only partially set the security descriptor\n"
2897 " on %lu files or directories.",
2898 ctx->partial_security_descriptors);
2900 if (ctx->no_security_descriptors) {
2901 WARNING("- Could not set security descriptor at all\n"
2902 " on %lu files or directories.",
2903 ctx->no_security_descriptors);
2905 if (ctx->partial_security_descriptors || ctx->no_security_descriptors) {
2906 WARNING("To fully restore all security descriptors, run the program\n"
2907 " with Administrator rights.");
2912 count_dentries(const struct list_head *dentry_list)
2914 const struct list_head *cur;
2917 list_for_each(cur, dentry_list)
2923 /* Extract files from a WIM image to a directory on Windows */
2925 win32_extract(struct list_head *dentry_list, struct apply_ctx *_ctx)
2928 struct win32_apply_ctx *ctx = (struct win32_apply_ctx *)_ctx;
2931 ret = prepare_target(dentry_list, ctx);
2935 if (unlikely(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT)) {
2936 ret = start_wimboot_extraction(dentry_list, ctx);
2941 ctx->windows_build_number = xml_get_windows_build_number(ctx->common.wim->xml_info,
2942 ctx->common.wim->current_image);
2944 dentry_count = count_dentries(dentry_list);
2946 ret = start_file_structure_phase(&ctx->common, dentry_count);
2950 ret = create_directories(dentry_list, ctx);
2954 ret = create_nondirectories(dentry_list, ctx);
2958 ret = end_file_structure_phase(&ctx->common);
2962 struct read_blob_callbacks cbs = {
2963 .begin_blob = begin_extract_blob,
2964 .consume_chunk = extract_chunk,
2965 .end_blob = end_extract_blob,
2968 ret = extract_blob_list(&ctx->common, &cbs);
2972 ret = start_file_metadata_phase(&ctx->common, dentry_count);
2976 ret = apply_metadata(dentry_list, ctx);
2980 ret = end_file_metadata_phase(&ctx->common);
2984 if (unlikely(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT)) {
2985 ret = end_wimboot_extraction(ctx);
2992 close_target_directory(ctx);
2993 if (ctx->target_ntpath.Buffer)
2994 HeapFree(GetProcessHeap(), 0, ctx->target_ntpath.Buffer);
2995 FREE(ctx->pathbuf.Buffer);
2996 FREE(ctx->print_buffer);
2997 FREE(ctx->wimboot.wims);
2998 if (ctx->prepopulate_pats) {
2999 FREE(ctx->prepopulate_pats->strings);
3000 FREE(ctx->prepopulate_pats);
3002 FREE(ctx->mem_prepopulate_pats);
3003 FREE(ctx->data_buffer);
3007 const struct apply_operations win32_apply_ops = {
3009 .get_supported_features = win32_get_supported_features,
3010 .extract = win32_extract,
3011 .will_back_from_wim = win32_will_back_from_wim,
3012 .context_size = sizeof(struct win32_apply_ctx),
3015 #endif /* __WIN32__ */