} else {
export_ctx.buf = NULL;
}
+ export_ctx.buf_filled = 0;
export_ctx.bytes_remaining = size;
err = OpenEncryptedFileRawW(lte->file_on_disk, 0, &file_ctx);
return status;
}
+static DWORD WINAPI
+win32_tally_encrypted_size_cb(unsigned char *_data, void *_ctx,
+ unsigned long len)
+{
+ *(u64*)_ctx += len;
+ return ERROR_SUCCESS;
+}
+
+static int
+win32_get_encrypted_file_size(const wchar_t *path, u64 *size_ret)
+{
+ DWORD err;
+ void *file_ctx;
+ int ret;
+
+ *size_ret = 0;
+ err = OpenEncryptedFileRawW(path, 0, &file_ctx);
+ if (err != ERROR_SUCCESS) {
+ ERROR("Failed to open encrypted file \"%ls\" for raw read", path);
+ win32_error(err);
+ return WIMLIB_ERR_OPEN;
+ }
+ err = ReadEncryptedFileRaw(win32_tally_encrypted_size_cb,
+ size_ret, file_ctx);
+ if (err != ERROR_SUCCESS) {
+ ERROR("Failed to read raw encrypted data from \"%ls\"", path);
+ win32_error(err);
+ ret = WIMLIB_ERR_READ;
+ } else {
+ ret = 0;
+ }
+ CloseEncryptedFileRaw(file_ctx);
+ return ret;
+}
+
/* Scans an unnamed or named stream of a Win32 file (not a reparse point
* stream); calculates its SHA1 message digest and either creates a `struct
* wim_lookup_table_entry' in memory for it, or uses an existing 'struct
}
lte->file_on_disk = spath;
spath = NULL;
- if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED && !is_named_stream)
+ if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED && !is_named_stream) {
+ u64 encrypted_size;
lte->resource_location = RESOURCE_WIN32_ENCRYPTED;
- else
+ ret = win32_get_encrypted_file_size(path, &encrypted_size);
+ if (ret)
+ goto out_free_spath;
+ lte->resource_entry.original_size = encrypted_size;
+ } else {
lte->resource_location = RESOURCE_WIN32;
- lte->resource_entry.original_size = (u64)dat->StreamSize.QuadPart;
+ lte->resource_entry.original_size = (u64)dat->StreamSize.QuadPart;
+ }
u32 stream_id;
if (is_named_stream) {
file_size = ((u64)file_info.nFileSizeHigh << 32) |
(u64)file_info.nFileSizeLow;
+ CloseHandle(hFile);
+
/* Capture the unnamed data stream (only should be present for regular
* files) and any alternate data streams. */
ret = win32_capture_streams(path,
file_size,
vol_flags);
if (ret)
- goto out_close_handle;
+ goto out;
if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
/* Reparse point: set the reparse data (which we read already)
state,
vol_flags);
}
+ goto out;
out_close_handle:
CloseHandle(hFile);
out:
return ret;
}
+/* Wrapper around the FSCTL_SET_REPARSE_POINT ioctl to set the reparse data on
+ * an extracted reparse point. */
static int
win32_set_reparse_data(HANDLE h,
u32 reparse_tag,
return 0;
}
+/* Wrapper around the FSCTL_SET_COMPRESSION ioctl to change the
+ * FILE_ATTRIBUTE_COMPRESSED flag of a file or directory. */
static int
win32_set_compression_state(HANDLE hFile, USHORT format, const wchar_t *path)
{
- DWORD bytesReturned = 0;
+ DWORD bytesReturned;
if (!DeviceIoControl(hFile, FSCTL_SET_COMPRESSION,
&format, sizeof(USHORT),
NULL, 0,
return 0;
}
+/* Wrapper around FSCTL_SET_SPARSE ioctl to set a file as sparse. */
static int
win32_set_sparse(HANDLE hFile, const wchar_t *path)
{
- DWORD bytesReturned = 0;
+ DWORD bytesReturned;
if (!DeviceIoControl(hFile, FSCTL_SET_SPARSE,
NULL, 0,
NULL, 0,
}
static int
-do_win32_extract_stream(HANDLE hStream, struct wim_lookup_table_entry *lte)
+do_win32_extract_stream(HANDLE hStream, const struct wim_lookup_table_entry *lte)
{
return extract_wim_resource(lte, wim_resource_size(lte),
win32_extract_chunk, hStream);
}
+struct win32_encrypted_extract_ctx {
+ void *file_ctx;
+ int wimlib_err_code;
+ bool done;
+ pthread_cond_t cond;
+ pthread_mutex_t mutex;
+ u8 buf[WIM_CHUNK_SIZE];
+ size_t buf_filled;
+};
+
+static DWORD WINAPI
+win32_encrypted_import_cb(unsigned char *data, void *_ctx,
+ unsigned long *len_p)
+{
+ struct win32_encrypted_extract_ctx *ctx = _ctx;
+ unsigned long len = *len_p;
+
+ pthread_mutex_lock(&ctx->mutex);
+ while (len) {
+ size_t bytes_to_copy;
+
+ DEBUG("Importing up to %lu more bytes of raw encrypted data", len);
+ while (ctx->buf_filled == 0) {
+ if (ctx->done)
+ goto out;
+ pthread_cond_wait(&ctx->cond, &ctx->mutex);
+ }
+ bytes_to_copy = min(len, ctx->buf_filled);
+ memcpy(data, ctx->buf, bytes_to_copy);
+ len -= bytes_to_copy;
+ data += bytes_to_copy;
+ ctx->buf_filled -= bytes_to_copy;
+ memmove(ctx->buf, ctx->buf + bytes_to_copy, ctx->buf_filled);
+ pthread_cond_signal(&ctx->cond);
+ }
+out:
+ *len_p -= len;
+ pthread_mutex_unlock(&ctx->mutex);
+ return ERROR_SUCCESS;
+}
+
+/* Extract ("Import") an encrypted file in a different thread. */
+static void *
+win32_encrypted_import_proc(void *arg)
+{
+ struct win32_encrypted_extract_ctx *ctx = arg;
+ DWORD ret;
+ ret = WriteEncryptedFileRaw(win32_encrypted_import_cb, ctx,
+ ctx->file_ctx);
+ pthread_mutex_lock(&ctx->mutex);
+ if (ret == ERROR_SUCCESS) {
+ ctx->wimlib_err_code = 0;
+ } else {
+ win32_error(ret);
+ ctx->wimlib_err_code = WIMLIB_ERR_WRITE;
+ }
+ ctx->done = true;
+ pthread_cond_signal(&ctx->cond);
+ pthread_mutex_unlock(&ctx->mutex);
+ return NULL;
+}
+
+
+static int
+win32_extract_raw_encrypted_chunk(const void *buf, size_t len, void *arg)
+{
+ struct win32_encrypted_extract_ctx *ctx = arg;
+ size_t bytes_to_copy;
+
+ while (len) {
+ DEBUG("Extracting up to %zu more bytes of encrypted data", len);
+ pthread_mutex_lock(&ctx->mutex);
+ while (ctx->buf_filled == WIM_CHUNK_SIZE) {
+ if (ctx->done) {
+ pthread_mutex_unlock(&ctx->mutex);
+ return ctx->wimlib_err_code;
+ }
+ pthread_cond_wait(&ctx->cond, &ctx->mutex);
+ }
+ bytes_to_copy = min(len, WIM_CHUNK_SIZE - ctx->buf_filled);
+ memcpy(&ctx->buf[ctx->buf_filled], buf, bytes_to_copy);
+ len -= bytes_to_copy;
+ buf += bytes_to_copy;
+ ctx->buf_filled += bytes_to_copy;
+ pthread_cond_signal(&ctx->cond);
+ pthread_mutex_unlock(&ctx->mutex);
+ }
+ return 0;
+}
+
+/* Create an encrypted file and extract the raw encrypted data to it.
+ *
+ * @path: Path to encrypted file to create.
+ * @lte: WIM lookup_table entry for the raw encrypted data.
+ *
+ * This is separate from do_win32_extract_stream() because the WIM is supposed
+ * to contain the *raw* encrypted data, which needs to be extracted ("imported")
+ * using the special APIs OpenEncryptedFileRawW(), WriteEncryptedFileRaw(), and
+ * CloseEncryptedFileRaw().
+ *
+ * Returns 0 on success; nonzero on failure.
+ */
static int
do_win32_extract_encrypted_stream(const wchar_t *path,
const struct wim_lookup_table_entry *lte)
{
- ERROR("Extracting encryted streams not implemented");
- return WIMLIB_ERR_INVALID_PARAM;
+ struct win32_encrypted_extract_ctx ctx;
+ void *file_ctx;
+ pthread_t import_thread;
+ int ret;
+ int ret2;
+
+ DEBUG("Opening file \"%ls\" to extract raw encrypted data", path);
+
+ ret = OpenEncryptedFileRawW(path, CREATE_FOR_IMPORT, &file_ctx);
+ if (ret) {
+ ERROR("Failed to open \"%ls\" to write raw encrypted data", path);
+ win32_error(ret);
+ return WIMLIB_ERR_OPEN;
+ }
+
+ if (!lte)
+ goto out_close;
+
+ /* Hack alert: WriteEncryptedFileRaw() requires the callback function
+ * to work with a buffer whose size we cannot control. This doesn't
+ * play well with our read_resource_prefix() function, which itself uses
+ * a callback function to extract WIM_CHUNK_SIZE chunks of data. We
+ * work around this problem by calling WriteEncryptedFileRaw() in a
+ * different thread and feeding it the data as needed. */
+ ctx.file_ctx = file_ctx;
+ ctx.buf_filled = 0;
+ ctx.done = false;
+ ctx.wimlib_err_code = 0;
+ if (pthread_mutex_init(&ctx.mutex, NULL)) {
+ ERROR_WITH_ERRNO("Can't create mutex");
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_close;
+ }
+ if (pthread_cond_init(&ctx.cond, NULL)) {
+ ERROR_WITH_ERRNO("Can't create condition variable");
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_pthread_mutex_destroy;
+ }
+ ret = pthread_create(&import_thread, NULL,
+ win32_encrypted_import_proc, &ctx);
+ if (ret) {
+ errno = ret;
+ ERROR_WITH_ERRNO("Failed to create thread");
+ ret = WIMLIB_ERR_FORK;
+ goto out_pthread_cond_destroy;
+ }
+
+ ret = extract_wim_resource(lte, wim_resource_size(lte),
+ win32_extract_raw_encrypted_chunk, &ctx);
+ pthread_mutex_lock(&ctx.mutex);
+ ctx.done = true;
+ pthread_cond_signal(&ctx.cond);
+ pthread_mutex_unlock(&ctx.mutex);
+ ret2 = pthread_join(import_thread, NULL);
+ if (ret2) {
+ errno = ret2;
+ ERROR_WITH_ERRNO("Failed to join encrypted import thread");
+ if (ret == 0)
+ ret = WIMLIB_ERR_WRITE;
+ }
+ if (ret == 0)
+ ret = ctx.wimlib_err_code;
+out_pthread_cond_destroy:
+ pthread_cond_destroy(&ctx.cond);
+out_pthread_mutex_destroy:
+ pthread_mutex_destroy(&ctx.mutex);
+out_close:
+ CloseEncryptedFileRaw(file_ctx);
+ if (ret)
+ ERROR("Failed to extract encrypted file \"%ls\"", path);
+ return ret;
}
static bool
return (*path == L'\0');
}
-static DWORD
-win32_get_create_flags_and_attributes(DWORD i_attributes)
+static inline DWORD
+win32_mask_attributes(DWORD i_attributes)
{
- DWORD attributes;
+ return i_attributes & ~(FILE_ATTRIBUTE_SPARSE_FILE |
+ FILE_ATTRIBUTE_COMPRESSED |
+ FILE_ATTRIBUTE_REPARSE_POINT |
+ FILE_ATTRIBUTE_DIRECTORY |
+ FILE_ATTRIBUTE_ENCRYPTED |
+ FILE_FLAG_DELETE_ON_CLOSE |
+ FILE_FLAG_NO_BUFFERING |
+ FILE_FLAG_OPEN_NO_RECALL |
+ FILE_FLAG_OVERLAPPED |
+ FILE_FLAG_RANDOM_ACCESS |
+ /*FILE_FLAG_SESSION_AWARE |*/
+ FILE_FLAG_SEQUENTIAL_SCAN |
+ FILE_FLAG_WRITE_THROUGH);
+}
+static inline DWORD
+win32_get_create_flags_and_attributes(DWORD i_attributes)
+{
/*
* Some attributes cannot be set by passing them to CreateFile(). In
* particular:
* want, but also specify FILE_FLAG_OPEN_REPARSE_POINT and
* FILE_FLAG_BACKUP_SEMANTICS as we are a backup application.
*/
- attributes = i_attributes & ~(FILE_ATTRIBUTE_SPARSE_FILE |
- FILE_ATTRIBUTE_COMPRESSED |
- FILE_ATTRIBUTE_REPARSE_POINT |
- FILE_ATTRIBUTE_DIRECTORY |
- FILE_FLAG_DELETE_ON_CLOSE |
- FILE_FLAG_NO_BUFFERING |
- FILE_FLAG_OPEN_NO_RECALL |
- FILE_FLAG_OVERLAPPED |
- FILE_FLAG_RANDOM_ACCESS |
- /*FILE_FLAG_SESSION_AWARE |*/
- FILE_FLAG_SEQUENTIAL_SCAN |
- FILE_FLAG_WRITE_THROUGH);
- return attributes |
- FILE_FLAG_OPEN_REPARSE_POINT |
- FILE_FLAG_BACKUP_SEMANTICS;
+ return win32_mask_attributes(i_attributes) |
+ FILE_FLAG_OPEN_REPARSE_POINT |
+ FILE_FLAG_BACKUP_SEMANTICS;
}
-/* Set compression or sparse attributes, and reparse data, if supported by the
+/* Set compression and/or sparse attributes on a stream, if supported by the
* volume. */
static int
-win32_set_special_attributes(HANDLE hFile, const struct wim_inode *inode,
- struct wim_lookup_table_entry *unnamed_stream_lte,
- const wchar_t *path, unsigned vol_flags)
+win32_set_special_stream_attributes(HANDLE hFile, const struct wim_inode *inode,
+ struct wim_lookup_table_entry *unnamed_stream_lte,
+ const wchar_t *path, unsigned vol_flags)
{
int ret;
- if (vol_flags & FILE_FILE_COMPRESSION) {
-
- USHORT format;
- if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED) {
- format = COMPRESSION_FORMAT_DEFAULT;
- DEBUG("Setting compression flag on \"%ls\"", path);
+ if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED) {
+ if (vol_flags & FILE_FILE_COMPRESSION) {
+ ret = win32_set_compression_state(hFile,
+ COMPRESSION_FORMAT_DEFAULT,
+ path);
+ if (ret)
+ return ret;
} else {
- format = COMPRESSION_FORMAT_NONE;
- DEBUG("Clearing compression flag on \"%ls\"", path);
- }
- ret = win32_set_compression_state(hFile, format, path);
- if (ret)
- return ret;
- } else {
- if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED) {
DEBUG("Cannot set compression attribute on \"%ls\": "
"volume does not support transparent compression",
path);
path);
}
}
+ return 0;
+}
- if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
- if (vol_flags & FILE_SUPPORTS_REPARSE_POINTS) {
- DEBUG("Setting reparse data on \"%ls\"", path);
- ret = win32_set_reparse_data(hFile, inode->i_reparse_tag,
- unnamed_stream_lte, path);
+/* Pre-create directories; extract encrypted streams */
+static int
+win32_begin_extract_unnamed_stream(const struct wim_inode *inode,
+ const struct wim_lookup_table_entry *lte,
+ const wchar_t *path,
+ DWORD *creationDisposition_ret,
+ unsigned int vol_flags)
+{
+ DWORD err;
+ int ret;
+
+ /* Directories must be created with CreateDirectoryW(). Then the call
+ * to CreateFileW() will merely open the directory that was already
+ * created rather than creating a new file. */
+ if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY &&
+ !path_is_root_of_drive(path)) {
+ if (!CreateDirectoryW(path, NULL)) {
+ err = GetLastError();
+ if (err != ERROR_ALREADY_EXISTS) {
+ ERROR("Failed to create directory \"%ls\"",
+ path);
+ win32_error(err);
+ return WIMLIB_ERR_MKDIR;
+ }
+ }
+ DEBUG("Created directory \"%ls\"", path);
+ *creationDisposition_ret = OPEN_EXISTING;
+ }
+ if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED &&
+ vol_flags & FILE_SUPPORTS_ENCRYPTION)
+ {
+ if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
+ if (!EncryptFile(path)) {
+ err = GetLastError();
+ ERROR("Failed to encrypt directory \"%ls\"",
+ path);
+ win32_error(err);
+ return WIMLIB_ERR_WRITE;
+ }
+ } else {
+ ret = do_win32_extract_encrypted_stream(path, lte);
if (ret)
return ret;
- } else {
- DEBUG("Cannot set reparse data on \"%ls\": volume "
- "does not support reparse points", path);
+ DEBUG("Extracted encrypted file \"%ls\"", path);
+ }
+ *creationDisposition_ret = OPEN_EXISTING;
+ }
+
+ /* Set file attributes if we created the file. Otherwise, we haven't
+ * created the file set and we will set the attributes in the call to
+ * CreateFileW().
+ *
+ * The FAT filesystem does not let you change the attributes of the root
+ * directory, so treat that as a special case and do not set attributes.
+ * */
+ if (*creationDisposition_ret == OPEN_EXISTING &&
+ !path_is_root_of_drive(path))
+ {
+ if (!SetFileAttributesW(path,
+ win32_mask_attributes(inode->i_attributes)))
+ {
+ err = GetLastError();
+ ERROR("Failed to set attributes on \"%ls\"", path);
+ win32_error(err);
+ return WIMLIB_ERR_WRITE;
}
}
return 0;
}
+/* Set security descriptor and extract stream data or reparse data (skip the
+ * unnamed data stream of encrypted files, which was already extracted). */
+static int
+win32_finish_extract_stream(HANDLE h, const struct wim_inode *inode,
+ const struct wim_lookup_table_entry *lte,
+ const wchar_t *stream_path,
+ const wchar_t *stream_name_utf16,
+ struct apply_args *args)
+{
+ int ret = 0;
+ if (stream_name_utf16 == NULL) {
+ /* Unnamed stream. */
+
+ /* Set security descriptor, unless the extract_flags indicate
+ * not to or the volume does not supported it. Note that this
+ * is only done when the unnamed stream is being extracted, as
+ * security descriptors are per-file and not per-stream. */
+ if (inode->i_security_id >= 0 &&
+ !(args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS)
+ && (args->vol_flags & FILE_PERSISTENT_ACLS))
+ {
+ ret = win32_set_security_data(inode, h, stream_path, args);
+ if (ret)
+ return ret;
+ }
+
+ /* Handle reparse points. The data for them needs to be set
+ * using a special ioctl. Note that the reparse point may have
+ * been created using CreateFileW() in the case of
+ * non-directories or CreateDirectoryW() in the case of
+ * directories; but the ioctl works either way. Also, it is
+ * only this step that actually sets the
+ * FILE_ATTRIBUTE_REPARSE_POINT, as it is not valid to set it
+ * using SetFileAttributesW() or CreateFileW().
+ *
+ * If the volume does not support reparse points we simply
+ * ignore the reparse data. (N.B. the code currently doesn't
+ * actually reach this case because reparse points are skipped
+ * entirely on such volumes.) */
+ if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
+ if (args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS) {
+ DEBUG("Setting reparse data on \"%ls\"",
+ stream_path);
+ ret = win32_set_reparse_data(h,
+ inode->i_reparse_tag,
+ lte, stream_path);
+ if (ret)
+ return ret;
+ } else {
+ DEBUG("Cannot set reparse data on \"%ls\": volume "
+ "does not support reparse points", stream_path);
+ }
+ } else if (lte != NULL &&
+ !(args->vol_flags & FILE_SUPPORTS_ENCRYPTION &&
+ inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED))
+ {
+ /* Extract the data of the unnamed stream, unless the
+ * lookup table entry is NULL (indicating an empty
+ * stream for which no data needs to be extracted), or
+ * the stream is encrypted and therefore was already
+ * extracted as a special case. */
+ ret = do_win32_extract_stream(h, lte);
+ }
+ } else {
+ /* Extract the data for a named data stream. */
+ if (lte != NULL) {
+ DEBUG("Extracting named data stream \"%ls\" (len = %"PRIu64")",
+ stream_path, wim_resource_size(lte));
+ ret = do_win32_extract_stream(h, lte);
+ }
+ }
+ return ret;
+}
+
+static int
+win32_decrypt_file(HANDLE open_handle, const wchar_t *path)
+{
+ DWORD err;
+ /* We cannot call DecryptFileW() while there is an open handle to the
+ * file. So close it first. */
+ if (!CloseHandle(open_handle)) {
+ err = GetLastError();
+ ERROR("Failed to close handle for \"%ls\"", path);
+ win32_error(err);
+ return WIMLIB_ERR_WRITE;
+ }
+ if (!DecryptFileW(path, 0 /* reserved parameter; set to 0 */)) {
+ err = GetLastError();
+ ERROR("Failed to decrypt file \"%ls\"", path);
+ win32_error(err);
+ return WIMLIB_ERR_WRITE;
+ }
+ return 0;
+}
+
+/*
+ * Create and extract a stream to a file, or create a directory, using the
+ * Windows API.
+ *
+ * This handles reparse points, directories, alternate data streams, encrypted
+ * files, compressed files, etc.
+ *
+ * @inode: WIM inode containing the stream.
+ *
+ * @path: Path to extract the file to.
+ *
+ * @stream_name_utf16:
+ * Name of the stream, or NULL if the stream is unnamed. This will
+ * be called with a NULL stream_name_utf16 before any non-NULL
+ * stream_name_utf16's.
+ *
+ * @lte: WIM lookup table entry for the stream. May be NULL to indicate
+ * a stream of length 0.
+ *
+ * @args: Additional apply context, including flags indicating supported
+ * volume features.
+ *
+ * Returns 0 on success; nonzero on failure.
+ */
static int
win32_extract_stream(const struct wim_inode *inode,
const wchar_t *path,
DWORD err;
DWORD creationDisposition = CREATE_ALWAYS;
DWORD requestedAccess;
+ BY_HANDLE_FILE_INFORMATION file_info;
if (stream_name_utf16) {
/* Named stream. Create a buffer that contains the UTF-16LE
* */
stream_path = (wchar_t*)path;
- /* Directories must be created with CreateDirectoryW(). Then
- * the call to CreateFileW() will merely open the directory that
- * was already created rather than creating a new file. */
- if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
- if (!CreateDirectoryW(stream_path, NULL)) {
- err = GetLastError();
- switch (err) {
- case ERROR_ALREADY_EXISTS:
- break;
- case ERROR_ACCESS_DENIED:
- if (path_is_root_of_drive(path))
- break;
- /* Fall through */
- default:
- ERROR("Failed to create directory \"%ls\"",
- stream_path);
- win32_error(err);
- ret = WIMLIB_ERR_MKDIR;
- goto fail;
- }
- }
- DEBUG("Created directory \"%ls\"", stream_path);
- creationDisposition = OPEN_EXISTING;
- }
+ ret = win32_begin_extract_unnamed_stream(inode, lte, path,
+ &creationDisposition,
+ args->vol_flags);
+ if (ret)
+ goto fail;
}
DEBUG("Opening \"%ls\"", stream_path);
requestedAccess = GENERIC_READ | GENERIC_WRITE |
ACCESS_SYSTEM_SECURITY;
try_open_again:
+ /* Open the stream to be extracted. Depending on what we have set
+ * creationDisposition to, we may be creating this for the first time,
+ * or we may be opening on existing stream we already created using
+ * CreateDirectoryW() or OpenEncryptedFileRawW(). */
h = CreateFileW(stream_path,
requestedAccess,
0,
NULL);
if (h == INVALID_HANDLE_VALUE) {
err = GetLastError();
+ if (err == ERROR_ACCESS_DENIED &&
+ path_is_root_of_drive(stream_path))
+ {
+ ret = 0;
+ goto out;
+ }
if (err == ERROR_PRIVILEGE_NOT_HELD &&
(requestedAccess & ACCESS_SYSTEM_SECURITY))
{
+ /* Try opening the file again without privilege to
+ * modify SACL. */
requestedAccess &= ~ACCESS_SYSTEM_SECURITY;
goto try_open_again;
}
goto fail;
}
- if (stream_name_utf16 == NULL) {
- if (inode->i_security_id >= 0 &&
- !(args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS)
- && (args->vol_flags & FILE_PERSISTENT_ACLS))
- {
- ret = win32_set_security_data(inode, h, path, args);
- if (ret)
- goto fail_close_handle;
- }
+ /* Check the attributes of the file we just opened, and remove
+ * encryption or compression if either was set by default but is not
+ * supposed to be set based on the WIM inode attributes. */
+ if (!GetFileInformationByHandle(h, &file_info)) {
+ err = GetLastError();
+ ERROR("Failed to get attributes of \"%ls\"", stream_path);
+ win32_error(err);
+ ret = WIMLIB_ERR_STAT;
+ goto fail_close_handle;
+ }
+
+ /* Remove encryption? */
+ if (file_info.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED &&
+ !(inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED))
+ {
+ /* File defaulted to encrypted due to being in an encrypted
+ * directory, but is not actually supposed to be encrypted.
+ *
+ * This is a workaround, because I'm not aware of any way to
+ * directly (e.g. with CreateFileW()) create an unencrypted file
+ * in a directory with FILE_ATTRIBUTE_ENCRYPTED set. */
+ ret = win32_decrypt_file(h, stream_path);
+ if (ret)
+ goto fail; /* win32_decrypt_file() closed the handle. */
+ creationDisposition = OPEN_EXISTING;
+ goto try_open_again;
+ }
- ret = win32_set_special_attributes(h, inode, lte, path,
- args->vol_flags);
+ /* Remove compression? */
+ if (file_info.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED &&
+ !(inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED))
+ {
+ /* Similar to the encrypted case, above, if the file defaulted
+ * to compressed due to being in an compressed directory, but is
+ * not actually supposed to be compressed, explicitly set the
+ * compression format to COMPRESSION_FORMAT_NONE. */
+ ret = win32_set_compression_state(h, COMPRESSION_FORMAT_NONE,
+ stream_path);
if (ret)
goto fail_close_handle;
}
- if (!(inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
- if (lte) {
- DEBUG("Extracting \"%ls\" (len = %"PRIu64")",
- stream_path, wim_resource_size(lte));
- if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED
- && stream_name_utf16 == NULL
- && (args->vol_flags & FILE_SUPPORTS_ENCRYPTION))
- {
- ret = do_win32_extract_encrypted_stream(stream_path,
- lte);
- } else {
- ret = do_win32_extract_stream(h, lte);
- }
- if (ret)
- goto fail_close_handle;
- }
- }
+ /* Set compression and/or sparse attributes if needed */
+ ret = win32_set_special_stream_attributes(h, inode, lte, path,
+ args->vol_flags);
+
+ if (ret)
+ goto fail_close_handle;
+
+ /* At this point we have at least created the needed stream with the
+ * appropriate attributes. We have yet to set the appropriate security
+ * descriptor and actually extract the stream data (other than for
+ * extracted files, which were already extracted).
+ * win32_finish_extract_stream() handles these additional steps. */
+ ret = win32_finish_extract_stream(h, inode, lte, stream_path,
+ stream_name_utf16, args);
+ if (ret)
+ goto fail_close_handle;
+ /* Done extracting the stream. Close the handle and return. */
DEBUG("Closing \"%ls\"", stream_path);
if (!CloseHandle(h)) {
err = GetLastError();
fail_close_handle:
CloseHandle(h);
fail:
- ERROR("Error extracting %ls", stream_path);
+ ERROR("Error extracting \"%ls\"", stream_path);
out:
return ret;
}
/*
* Creates a file, directory, or reparse point and extracts all streams to it
* (unnamed data stream and/or reparse point stream, plus any alternate data
- * streams).
+ * streams). Handles sparse, compressed, and/or encrypted files.
*
* @inode: WIM inode for this file or directory.
* @path: UTF-16LE external path to extract the inode to.
struct wim_lookup_table_entry *unnamed_lte;
int ret;
- /* Extract the unnamed stream. */
+ /* First extract the unnamed stream. */
unnamed_lte = inode_unnamed_lte_resolved(inode);
ret = win32_extract_stream(inode, path, NULL, unnamed_lte, args);
if (ret)
goto out;
- if (unnamed_lte && inode->i_extracted_file == NULL)
- {
- args->progress.extract.completed_bytes +=
- wim_resource_size(unnamed_lte);
- }
/* Extract any named streams, if supported by the volume. */
args);
if (ret)
break;
-
- /* Tally the bytes extracted, unless this was supposed to be a
- * hard link and we are extracting the data again only as a
- * fallback. */
- if (ads_entry->lte && inode->i_extracted_file == NULL)
- {
- args->progress.extract.completed_bytes +=
- wim_resource_size(ads_entry->lte);
- }
}
out:
return ret;
}
+/* If not done already, load the supported feature flags for the volume onto
+ * which the image is being extracted, and warn the user about any missing
+ * features that could be important. */
static int
win32_check_vol_flags(const wchar_t *output_path, struct apply_args *args)
{
return 0;
}
+/*
+ * Try extracting a hard link.
+ *
+ * @output_path: Path to link to be extracted.
+ *
+ * @inode: WIM inode that the link is to; inode->i_extracted_file
+ * the path to a name of the file that has already been
+ * extracted (we use this to create the hard link).
+ *
+ * @args: Additional apply context, used here to keep track of
+ * the number of times creating a hard link failed due to
+ * ERROR_INVALID_FUNCTION. This error should indicate that hard
+ * links are not supported by the volume, and we would like to
+ * warn the user a few times, but not too many times.
+ *
+ * Returns 0 if the hard link was successfully extracted. Returns
+ * WIMLIB_ERR_LINK (> 0) if an error occurred, other than hard links possibly
+ * being unsupported by the volume. Returns a negative value if creating the
+ * hard link failed due to ERROR_INVALID_FUNCTION.
+ */
static int
win32_try_hard_link(const wchar_t *output_path, const struct wim_inode *inode,
struct apply_args *args)
ret = win32_try_hard_link(output_path, inode, args);
if (ret >= 0)
return ret;
- /* Falling back to extracting copy of file */
+ /* Negative return value from win32_try_hard_link() indicates
+ * that hard links are probably not supported by the volume.
+ * Fall back to extracting a copy of the file. */
}
+ /* If this is a reparse point and the volume does not support reparse
+ * points, just skip it completely. */
if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT &&
!(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS))
{
WARNING("Skipping extraction of reparse point \"%ls\":\n"
" Not supported by destination filesystem",
output_path);
- struct wim_lookup_table_entry *lte;
- lte = inode_unnamed_lte_resolved(inode);
- if (lte)
- args->progress.extract.completed_bytes += wim_resource_size(lte);
- return 0;
+ } else {
+ /* Create the file, directory, or reparse point, and extract the
+ * data streams. */
+ ret = win32_extract_streams(inode, output_path, args);
+ if (ret)
+ return ret;
}
-
- /* Create the file, directory, or reparse point, and extract the
- * data streams. */
- ret = win32_extract_streams(inode, output_path, args);
- if (ret)
- return ret;
-
- if (inode->i_nlink > 1) {
- /* Save extracted path for a later call to
- * CreateHardLinkW() if this inode has multiple links.
- * */
- inode->i_extracted_file = WSTRDUP(output_path);
- if (!inode->i_extracted_file)
- ret = WIMLIB_ERR_NOMEM;
+ if (inode->i_extracted_file == NULL) {
+ const struct wim_lookup_table_entry *lte;
+
+ /* Tally bytes extracted, including all alternate data streams,
+ * unless we extracted a hard link (or, at least extracted a
+ * name that was supposed to be a hard link) */
+ for (unsigned i = 0; i <= inode->i_num_ads; i++) {
+ lte = inode_stream_lte_resolved(inode, i);
+ if (lte)
+ args->progress.extract.completed_bytes +=
+ wim_resource_size(lte);
+ }
+ if (inode->i_nlink > 1) {
+ /* Save extracted path for a later call to
+ * CreateHardLinkW() if this inode has multiple links.
+ * */
+ inode->i_extracted_file = WSTRDUP(output_path);
+ if (!inode->i_extracted_file)
+ return WIMLIB_ERR_NOMEM;
+ }
}
- return ret;
+ return 0;
}
/* Set timestamps on an extracted file using the Win32 API */
git://wimlib.net / wimlib / blobdiff