X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fwin32_apply.c;h=e26455c4ae03de9b1484391f6644fadd96e15de0;hp=bce897a46344860ed42ce0b82b6ef086140b81c9;hb=956f44f1fa63c3dfb99b080d4961c7c44fac640d;hpb=d1301021c8edf915004faf291f31e4c99b0bcfde diff --git a/src/win32_apply.c b/src/win32_apply.c index bce897a4..e26455c4 100644 --- a/src/win32_apply.c +++ b/src/win32_apply.c @@ -44,40 +44,105 @@ win32_start_extract(const wchar_t *path, struct apply_ctx *ctx) if (ret) return ret; - ctx->supported_features.archive_files = 1; - ctx->supported_features.hidden_files = 1; - ctx->supported_features.system_files = 1; - ctx->supported_features.compressed_files = !!(vol_flags & FILE_FILE_COMPRESSION); - ctx->supported_features.encrypted_files = !!(vol_flags & FILE_SUPPORTS_ENCRYPTION); + ctx->supported_features.archive_files = 1; + ctx->supported_features.hidden_files = 1; + ctx->supported_features.system_files = 1; + + if (vol_flags & FILE_FILE_COMPRESSION) + ctx->supported_features.compressed_files = 1; + + if (vol_flags & FILE_SUPPORTS_ENCRYPTION) { + ctx->supported_features.encrypted_files = 1; + ctx->supported_features.encrypted_directories = 1; + } + ctx->supported_features.not_context_indexed_files = 1; - ctx->supported_features.sparse_files = !!(vol_flags & FILE_SUPPORTS_SPARSE_FILES); - ctx->supported_features.named_data_streams = !!(vol_flags & FILE_NAMED_STREAMS); - ctx->supported_features.hard_links = !!(vol_flags & FILE_SUPPORTS_HARD_LINKS); - ctx->supported_features.reparse_points = !!(vol_flags & FILE_SUPPORTS_REPARSE_POINTS); - ctx->supported_features.security_descriptors = !!(vol_flags & FILE_PERSISTENT_ACLS); - ctx->supported_features.short_names = !!supports_SetFileShortName; + + if (vol_flags & FILE_SUPPORTS_SPARSE_FILES) + ctx->supported_features.sparse_files = 1; + + if (vol_flags & FILE_NAMED_STREAMS) + ctx->supported_features.named_data_streams = 1; + + if (vol_flags & FILE_SUPPORTS_HARD_LINKS) + ctx->supported_features.hard_links = 1; + + if (vol_flags & FILE_SUPPORTS_REPARSE_POINTS) { + ctx->supported_features.reparse_points = 1; + if (win32func_CreateSymbolicLinkW) + ctx->supported_features.symlink_reparse_points = 1; + } + + if (vol_flags & FILE_PERSISTENT_ACLS) + ctx->supported_features.security_descriptors = 1; + + if (supports_SetFileShortName) + ctx->supported_features.short_names = 1; return 0; } +/* Create a normal file, overwriting one already present. */ static int -win32_create_file(const wchar_t *path, struct apply_ctx *ctx) +win32_create_file(const wchar_t *path, struct apply_ctx *ctx, u64 *cookie_ret) { HANDLE h; + unsigned retry_count = 0; + DWORD dwFlagsAndAttributes = FILE_FLAG_BACKUP_SEMANTICS; - h = CreateFile(path, 0, 0, NULL, CREATE_ALWAYS, - FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS, NULL); - if (h == INVALID_HANDLE_VALUE) - goto error; +retry: + /* WRITE_OWNER and WRITE_DAC privileges are required for some reason, + * even through we're creating a new file. */ + h = CreateFile(path, WRITE_OWNER | WRITE_DAC, 0, NULL, + CREATE_ALWAYS, dwFlagsAndAttributes, NULL); + if (h == INVALID_HANDLE_VALUE) { + /* File couldn't be created. */ + DWORD err = GetLastError(); + if (err == ERROR_ACCESS_DENIED && retry_count == 0) { + + /* Access denied error for the first time. Try + * adjusting file attributes. */ + + /* Get attributes of the existing file. */ + DWORD attribs = GetFileAttributes(path); + if (attribs != INVALID_FILE_ATTRIBUTES && + (attribs & (FILE_ATTRIBUTE_HIDDEN | + FILE_ATTRIBUTE_SYSTEM | + FILE_ATTRIBUTE_READONLY))) + { + /* If the existing file has + * FILE_ATTRIBUTE_HIDDEN and/or + * FILE_ATTRIBUTE_SYSTEM, they must be set in + * the call to CreateFile(). This is true even + * when FILE_ATTRIBUTE_NORMAL was not specified, + * contrary to the MS "documentation". */ + dwFlagsAndAttributes |= (attribs & + (FILE_ATTRIBUTE_HIDDEN | + FILE_ATTRIBUTE_SYSTEM)); + /* If the existing file has + * FILE_ATTRIBUTE_READONLY, it must be cleared + * before attempting to create a new file over + * it. This is true even when the process has + * the SE_RESTORE_NAME privilege and requested + * the FILE_FLAG_BACKUP_SEMANTICS flag to + * CreateFile(). */ + if (attribs & FILE_ATTRIBUTE_READONLY) { + SetFileAttributes(path, + attribs & ~FILE_ATTRIBUTE_READONLY); + } + retry_count++; + goto retry; + } + } + set_errno_from_win32_error(err); + return WIMLIB_ERR_OPEN; + } CloseHandle(h); return 0; - -error: - set_errno_from_GetLastError(); - return WIMLIB_ERR_OPEN; } static int -win32_create_directory(const wchar_t *path, struct apply_ctx *ctx) +win32_create_directory(const wchar_t *path, struct apply_ctx *ctx, + u64 *cookie_ret) { if (!CreateDirectory(path, NULL)) if (GetLastError() != ERROR_ALREADY_EXISTS) @@ -89,12 +154,64 @@ error: return WIMLIB_ERR_MKDIR; } +/* Delete a non-directory file, working around Windows quirks. */ +static BOOL +win32_delete_file_wrapper(const wchar_t *path) +{ + DWORD attrib; + DWORD err; + + if (DeleteFile(path)) + return TRUE; + + err = GetLastError(); + attrib = GetFileAttributes(path); + if (attrib & FILE_ATTRIBUTE_READONLY) { + /* Try again with FILE_ATTRIBUTE_READONLY cleared. */ + attrib &= ~FILE_ATTRIBUTE_READONLY; + if (SetFileAttributes(path, attrib)) { + if (DeleteFile(path)) + return TRUE; + else + err = GetLastError(); + } + } + + SetLastError(err); + return FALSE; +} + static int win32_create_hardlink(const wchar_t *oldpath, const wchar_t *newpath, struct apply_ctx *ctx) { - if (!CreateHardLink(newpath, oldpath, NULL)) - goto error; + if (!CreateHardLink(newpath, oldpath, NULL)) { + if (GetLastError() != ERROR_ALREADY_EXISTS) + goto error; + if (!win32_delete_file_wrapper(newpath)) + goto error; + if (!CreateHardLink(newpath, oldpath, NULL)) + goto error; + } + return 0; + +error: + set_errno_from_GetLastError(); + return WIMLIB_ERR_LINK; +} + +static int +win32_create_symlink(const wchar_t *oldpath, const wchar_t *newpath, + struct apply_ctx *ctx) +{ + if (!(*win32func_CreateSymbolicLinkW)(newpath, oldpath, 0)) { + if (GetLastError() != ERROR_ALREADY_EXISTS) + goto error; + if (!win32_delete_file_wrapper(newpath)) + goto error; + if (!(*win32func_CreateSymbolicLinkW)(newpath, oldpath, 0)) + goto error; + } return 0; error: @@ -134,7 +251,7 @@ win32_extract_stream(const wchar_t *path, const wchar_t *stream_name, stream_path = alloca(sizeof(wchar_t) * (wcslen(path) + 1 + wcslen(stream_name) + 1)); - swprintf(stream_path, L"%ls:%ls", path, stream_name); + tsprintf(stream_path, L"%ls:%ls", path, stream_name); } h = CreateFile(stream_path, FILE_WRITE_DATA, 0, NULL, @@ -147,8 +264,7 @@ win32_extract_stream(const wchar_t *path, const wchar_t *stream_name, ret = 0; if (!lte) goto out_close_handle; - ret = extract_wim_resource(lte, wim_resource_size(lte), - win32_extract_wim_chunk, h); + ret = extract_stream(lte, lte->size, win32_extract_wim_chunk, h); out_close_handle: if (!CloseHandle(h)) goto error; @@ -162,19 +278,19 @@ error: } static int -win32_extract_unnamed_stream(const wchar_t *path, +win32_extract_unnamed_stream(file_spec_t file, struct wim_lookup_table_entry *lte, struct apply_ctx *ctx) { - return win32_extract_stream(path, NULL, 0, lte, ctx); + return win32_extract_stream(file.path, NULL, 0, lte, ctx); } static int -win32_extract_named_stream(const wchar_t *path, const wchar_t *stream_name, +win32_extract_named_stream(file_spec_t file, const wchar_t *stream_name, size_t stream_name_nchars, struct wim_lookup_table_entry *lte, struct apply_ctx *ctx) { - return win32_extract_stream(path, stream_name, + return win32_extract_stream(file.path, stream_name, stream_name_nchars, lte, ctx); } @@ -191,9 +307,9 @@ win32_encrypted_import_cb(unsigned char *data, void *_import_ctx, unsigned long len = *len_p; const struct wim_lookup_table_entry *lte = import_ctx->lte; - len = min(len, wim_resource_size(lte) - import_ctx->offset); + len = min(len, lte->size - import_ctx->offset); - if (read_partial_wim_resource_into_buf(lte, len, import_ctx->offset, data)) + if (read_partial_wim_stream_into_buf(lte, len, import_ctx->offset, data)) return ERROR_READ_FAULT; import_ctx->offset += len; @@ -213,7 +329,7 @@ win32_extract_encrypted_stream(const wchar_t *path, err = OpenEncryptedFileRaw(path, CREATE_FOR_IMPORT, &file_ctx); if (err != ERROR_SUCCESS) { - errno = win32_error_to_errno(err); + set_errno_from_win32_error(err); ret = WIMLIB_ERR_OPEN; goto out; } @@ -223,7 +339,7 @@ win32_extract_encrypted_stream(const wchar_t *path, err = WriteEncryptedFileRaw(win32_encrypted_import_cb, &extract_ctx, file_ctx); if (err != ERROR_SUCCESS) { - errno = win32_error_to_errno(err); + set_errno_from_win32_error(err); ret = WIMLIB_ERR_WRITE; goto out_close; } @@ -243,10 +359,7 @@ win32_set_special_file_attributes(const wchar_t *path, u32 attributes) USHORT compression_format = COMPRESSION_FORMAT_DEFAULT; DWORD bytes_returned; - h = CreateFile(path, GENERIC_READ | GENERIC_WRITE, 0, NULL, - OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | - FILE_FLAG_OPEN_REPARSE_POINT, - NULL); + h = win32_open_existing_file(path, GENERIC_READ | GENERIC_WRITE); if (h == INVALID_HANDLE_VALUE) goto error; @@ -283,7 +396,7 @@ error: static int win32_set_file_attributes(const wchar_t *path, u32 attributes, - struct apply_ctx *ctx) + struct apply_ctx *ctx, unsigned pass) { u32 special_attributes = FILE_ATTRIBUTE_REPARSE_POINT | @@ -293,9 +406,19 @@ win32_set_file_attributes(const wchar_t *path, u32 attributes, FILE_ATTRIBUTE_ENCRYPTED; u32 actual_attributes; + /* Delay setting FILE_ATTRIBUTE_READONLY on the initial pass (when files + * are created, but data not extracted); otherwise the system will + * refuse access to the file even if the process has SeRestorePrivilege. + */ + if (pass == 0) + attributes &= ~FILE_ATTRIBUTE_READONLY; + if (!SetFileAttributes(path, attributes & ~special_attributes)) goto error; + if (pass != 0) + return 0; + if (attributes & (FILE_ATTRIBUTE_SPARSE_FILE | FILE_ATTRIBUTE_ENCRYPTED | FILE_ATTRIBUTE_COMPRESSED)) @@ -320,10 +443,7 @@ win32_set_file_attributes(const wchar_t *path, u32 attributes, DWORD bytes_returned; USHORT compression_format = COMPRESSION_FORMAT_NONE; - h = CreateFile(path, GENERIC_READ | GENERIC_WRITE, 0, NULL, - OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | - FILE_FLAG_OPEN_REPARSE_POINT, - NULL); + h = win32_open_existing_file(path, GENERIC_READ | GENERIC_WRITE); if (h == INVALID_HANDLE_VALUE) goto error; @@ -342,7 +462,6 @@ win32_set_file_attributes(const wchar_t *path, u32 attributes, goto error; } -success: return 0; error: @@ -358,10 +477,7 @@ win32_set_reparse_data(const wchar_t *path, const u8 *rpbuf, u16 rpbuflen, DWORD err; DWORD bytes_returned; - h = CreateFile(path, GENERIC_WRITE, 0, NULL, - OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | - FILE_FLAG_OPEN_REPARSE_POINT, - NULL); + h = win32_open_existing_file(path, GENERIC_WRITE); if (h == INVALID_HANDLE_VALUE) goto error; @@ -391,10 +507,7 @@ win32_set_short_name(const wchar_t *path, const wchar_t *short_name, HANDLE h; DWORD err; - h = CreateFile(path, GENERIC_WRITE | DELETE, 0, NULL, - OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | - FILE_FLAG_OPEN_REPARSE_POINT, - NULL); + h = win32_open_existing_file(path, GENERIC_WRITE | DELETE); if (h == INVALID_HANDLE_VALUE) goto error; @@ -420,32 +533,85 @@ error: return WIMLIB_ERR_WRITE; /* XXX: need better error code */ } +static DWORD +do_win32_set_security_descriptor(HANDLE h, const wchar_t *path, + SECURITY_INFORMATION info, + PSECURITY_DESCRIPTOR desc) +{ +#ifdef WITH_NTDLL + if (func_NtSetSecurityObject) { + return (*func_RtlNtStatusToDosError)( + (*func_NtSetSecurityObject)(h, info, desc)); + } +#endif + if (SetFileSecurity(path, info, desc)) + return ERROR_SUCCESS; + else + return GetLastError(); +} + static int -win32_set_security_descriptor(const wchar_t *path, const u8 *desc, size_t desc_size, - struct apply_ctx *ctx) +win32_set_security_descriptor(const wchar_t *path, const u8 *desc, + size_t desc_size, struct apply_ctx *ctx) { SECURITY_INFORMATION info; + HANDLE h; + DWORD err; + int ret; - info = OWNER_SECURITY_INFORMATION | - GROUP_SECURITY_INFORMATION | - DACL_SECURITY_INFORMATION | - SACL_SECURITY_INFORMATION; -retry: - if (!SetFileSecurity(path, info, (PSECURITY_DESCRIPTOR)desc)) { - if (!(ctx->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS) && - GetLastError() == ERROR_PRIVILEGE_NOT_HELD && - (info & SACL_SECURITY_INFORMATION)) - { - info &= ~SACL_SECURITY_INFORMATION; - goto retry; + info = OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | + DACL_SECURITY_INFORMATION | SACL_SECURITY_INFORMATION; + h = INVALID_HANDLE_VALUE; + +#ifdef WITH_NTDLL + if (func_NtSetSecurityObject) { + h = win32_open_existing_file(path, MAXIMUM_ALLOWED); + if (h == INVALID_HANDLE_VALUE) { + set_errno_from_GetLastError(); + ERROR_WITH_ERRNO("Can't open %ls", path); + return WIMLIB_ERR_SET_SECURITY; } - goto error; } - return 0; +#endif -error: - set_errno_from_GetLastError(); - return WIMLIB_ERR_SET_SECURITY; + for (;;) { + err = do_win32_set_security_descriptor(h, path, info, + (PSECURITY_DESCRIPTOR)desc); + if (err == ERROR_SUCCESS) { + ret = 0; + break; + } + if ((err == ERROR_PRIVILEGE_NOT_HELD || + err == ERROR_ACCESS_DENIED) && + !(ctx->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS)) + { + if (info & SACL_SECURITY_INFORMATION) { + info &= ~SACL_SECURITY_INFORMATION; + ctx->partial_security_descriptors++; + continue; + } + if (info & DACL_SECURITY_INFORMATION) { + info &= ~DACL_SECURITY_INFORMATION; + continue; + } + if (info & OWNER_SECURITY_INFORMATION) { + info &= ~OWNER_SECURITY_INFORMATION; + continue; + } + ctx->partial_security_descriptors--; + ctx->no_security_descriptors++; + ret = 0; + break; + } + set_errno_from_win32_error(err); + ret = WIMLIB_ERR_SET_SECURITY; + break; + } +#ifdef WITH_NTDLL + if (func_NtSetSecurityObject) + CloseHandle(h); +#endif + return ret; } static int @@ -462,10 +628,7 @@ win32_set_timestamps(const wchar_t *path, u64 creation_time, FILETIME lastWriteTime = {.dwLowDateTime = last_write_time & 0xffffffff, .dwHighDateTime = last_write_time >> 32}; - h = CreateFile(path, FILE_WRITE_ATTRIBUTES, 0, NULL, - OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | - FILE_FLAG_OPEN_REPARSE_POINT, - NULL); + h = win32_open_existing_file(path, FILE_WRITE_ATTRIBUTES); if (h == INVALID_HANDLE_VALUE) goto error; @@ -494,6 +657,7 @@ const struct apply_operations win32_apply_ops = { .create_file = win32_create_file, .create_directory = win32_create_directory, .create_hardlink = win32_create_hardlink, + .create_symlink = win32_create_symlink, .extract_unnamed_stream = win32_extract_unnamed_stream, .extract_named_stream = win32_extract_named_stream, .extract_encrypted_stream = win32_extract_encrypted_stream, @@ -511,6 +675,9 @@ const struct apply_operations win32_apply_ops = { .requires_realtarget_in_paths = 1, .realpath_works_on_nonexisting_files = 1, .root_directory_is_special = 1, + .requires_final_set_attributes_pass = 1, + .extract_encrypted_stream_creates_file = 1, + .requires_short_name_reordering = 1, /* TODO: check if this is really needed */ }; #endif /* __WIN32__ */