#include <stdlib.h>
#include <unistd.h>
+extern int ntfs_inode_get_security(ntfs_inode *ni, u32 selection, char *buf,
+ u32 buflen, u32 *psize);
+
+extern int ntfs_inode_get_attributes(ntfs_inode *ni);
+
+/* Structure that allows searching the security descriptors by SHA1 message
+ * digest. */
+struct sd_set {
+ struct wim_security_data *sd;
+ struct sd_node *root;
+};
+
+/* Binary tree node of security descriptors, indexed by the @hash field. */
+struct sd_node {
+ int security_id;
+ u8 hash[SHA1_HASH_SIZE];
+ struct sd_node *left;
+ struct sd_node *right;
+};
+
+/* Frees a security descriptor index tree. */
+static void free_sd_set(struct sd_node *root)
+{
+ if (root) {
+ free_sd_set(root->left);
+ free_sd_set(root->right);
+ FREE(root);
+ }
+}
+
+/* Inserts a a new node into the security descriptor index tree. */
+static void insert_sd_node(struct sd_node *new, struct sd_node *root)
+{
+ int cmp = hashes_cmp(new->hash, root->hash);
+ if (cmp < 0) {
+ if (root->left)
+ insert_sd_node(new, root->left);
+ else
+ root->left = new;
+ } else if (cmp > 0) {
+ if (root->right)
+ insert_sd_node(new, root->right);
+ else
+ root->right = new;
+ } else {
+ wimlib_assert(0);
+ }
+}
+
+/* Returns the security ID of the security data having a SHA1 message digest of
+ * @hash in the security descriptor index tree rooted at @root.
+ *
+ * If not found, return -1. */
+static int lookup_sd(const u8 hash[SHA1_HASH_SIZE], struct sd_node *root)
+{
+ int cmp;
+ if (!root)
+ return -1;
+ cmp = hashes_cmp(hash, root->hash);
+ if (cmp < 0)
+ return lookup_sd(hash, root->left);
+ else if (cmp > 0)
+ return lookup_sd(hash, root->right);
+ else
+ return root->security_id;
+}
+
+/*
+ * Adds a security descriptor to the indexed security descriptor set as well as
+ * the corresponding `struct wim_security_data', and returns the new security
+ * ID; or, if there is an existing security descriptor that is the same, return
+ * the security ID for it. If a new security descriptor cannot be allocated,
+ * return -1.
+ */
+static int sd_set_add_sd(struct sd_set *sd_set, const u8 *descriptor,
+ size_t size)
+{
+ u8 hash[SHA1_HASH_SIZE];
+ int security_id;
+ struct sd_node *new;
+ u8 **descriptors;
+ u64 *sizes;
+ u8 *descr_copy;
+ struct wim_security_data *sd;
+
+ sha1_buffer(descriptor, size, hash);
+ security_id = lookup_sd(hash, sd_set->root);
+ if (security_id >= 0)
+ return security_id;
+
+ new = MALLOC(sizeof(*new));
+ if (!new)
+ goto out;
+ descr_copy = MALLOC(size);
+ if (!descr_copy)
+ goto out_free_node;
+
+ sd = sd_set->sd;
+
+ memcpy(descr_copy, descriptor, size);
+ new->security_id = sd->num_entries;
+ new->left = NULL;
+ new->right = NULL;
+ copy_hash(new->hash, hash);
+
+
+ descriptors = REALLOC(sd->descriptors,
+ (sd->num_entries + 1) * sizeof(sd->descriptors[0]));
+ if (!descriptors)
+ goto out_free_descr;
+ sd->descriptors = descriptors;
+ sizes = REALLOC(sd->sizes,
+ (sd->num_entries + 1) * sizeof(sd->sizes[0]));
+ if (!sizes)
+ goto out_free_descr;
+ sd->sizes = sizes;
+ sd->descriptors[sd->num_entries] = descr_copy;
+ sd->sizes[sd->num_entries] = size;
+ sd->num_entries++;
+ sd->total_length += size + sizeof(sd->sizes[0]);
+
+ if (sd_set->root)
+ insert_sd_node(sd_set->root, new);
+ else
+ sd_set->root = new;
+ return new->security_id;
+out_free_descr:
+ FREE(descr_copy);
+out_free_node:
+ FREE(new);
+out:
+ return -1;
+}
+
+static inline ntfschar *attr_record_name(ATTR_RECORD *ar)
+{
+ return (ntfschar*)((u8*)ar + le16_to_cpu(ar->name_offset));
+}
+
+/* Calculates the SHA1 message digest of a NTFS attribute.
+ *
+ * @ni: The NTFS inode containing the attribute.
+ * @ar: The ATTR_RECORD describing the attribute.
+ * @md: If successful, the returned SHA1 message digest.
+ *
+ * Return 0 on success or nonzero on error.
+ */
+static int ntfs_attr_sha1sum(ntfs_inode *ni, ATTR_RECORD *ar,
+ u8 md[SHA1_HASH_SIZE])
+{
+ s64 pos = 0;
+ s64 bytes_remaining;
+ char buf[4096];
+ ntfs_attr *na;
+ SHA_CTX ctx;
+
+ na = ntfs_attr_open(ni, ar->type, attr_record_name(ar),
+ ar->name_length);
+ if (!na) {
+ ERROR_WITH_ERRNO("Failed to open NTFS attribute");
+ return WIMLIB_ERR_NTFS_3G;
+ }
+
+ bytes_remaining = na->data_size;
+ sha1_init(&ctx);
+
+ DEBUG("Calculating SHA1 message digest (%"PRIu64" bytes)",
+ bytes_remaining);
+
+ while (bytes_remaining) {
+ s64 to_read = min(bytes_remaining, sizeof(buf));
+ if (ntfs_attr_pread(na, pos, to_read, buf) != to_read) {
+ ERROR_WITH_ERRNO("Error reading NTFS attribute");
+ return WIMLIB_ERR_NTFS_3G;
+ }
+ sha1_update(&ctx, buf, to_read);
+ pos += to_read;
+ bytes_remaining -= to_read;
+ }
+ sha1_final(md, &ctx);
+ ntfs_attr_close(na);
+ return 0;
+}
+
+/* Load the streams from a WIM file or reparse point in the NTFS volume into the
+ * WIM lookup table */
+static int capture_ntfs_streams(struct dentry *dentry, ntfs_inode *ni,
+ char path[], size_t path_len,
+ struct lookup_table *lookup_table,
+ ntfs_volume **ntfs_vol_p,
+ ATTR_TYPES type)
+{
+
+ ntfs_attr_search_ctx *actx;
+ u8 attr_hash[SHA1_HASH_SIZE];
+ struct ntfs_location *ntfs_loc;
+ struct lookup_table_entry *lte;
+ int ret = 0;
+
+ DEBUG("Capturing NTFS data streams from `%s'", path);
+
+ /* Get context to search the streams of the NTFS file. */
+ actx = ntfs_attr_get_search_ctx(ni, NULL);
+ if (!actx) {
+ ERROR_WITH_ERRNO("Cannot get attribute search "
+ "context");
+ return WIMLIB_ERR_NTFS_3G;
+ }
+
+ /* Capture each data stream or reparse data stream. */
+ while (!ntfs_attr_lookup(type, NULL, 0,
+ CASE_SENSITIVE, 0, NULL, 0, actx))
+ {
+ char *stream_name_utf8;
+ size_t stream_name_utf16_len;
+
+ /* Checksum the stream. */
+ ret = ntfs_attr_sha1sum(ni, actx->attr, attr_hash);
+ if (ret != 0)
+ goto out_put_actx;
+
+ /* Make a lookup table entry for the stream, or use an existing
+ * one if there's already an identical stream. */
+ lte = __lookup_resource(lookup_table, attr_hash);
+ ret = WIMLIB_ERR_NOMEM;
+ if (lte) {
+ lte->refcnt++;
+ } else {
+ struct ntfs_location *ntfs_loc;
+
+ ntfs_loc = CALLOC(1, sizeof(*ntfs_loc));
+ if (!ntfs_loc)
+ goto out_put_actx;
+ ntfs_loc->ntfs_vol_p = ntfs_vol_p;
+ ntfs_loc->path_utf8 = MALLOC(path_len + 1);
+ if (!ntfs_loc->path_utf8)
+ goto out_free_ntfs_loc;
+ memcpy(ntfs_loc->path_utf8, path, path_len + 1);
+ ntfs_loc->stream_name_utf16 = MALLOC(actx->attr->name_length * 2);
+ if (!ntfs_loc->stream_name_utf16)
+ goto out_free_ntfs_loc;
+ memcpy(ntfs_loc->stream_name_utf16,
+ attr_record_name(actx->attr),
+ actx->attr->name_length * 2);
+
+ ntfs_loc->stream_name_utf16_num_chars = actx->attr->name_length;
+ ntfs_loc->is_reparse_point = (type == AT_REPARSE_POINT);
+ lte = new_lookup_table_entry();
+ if (!lte)
+ goto out_free_ntfs_loc;
+ lte->ntfs_loc = ntfs_loc;
+ lte->resource_location = RESOURCE_IN_NTFS_VOLUME;
+ lte->resource_entry.original_size = actx->attr->data_size;
+ lte->resource_entry.size = actx->attr->data_size;
+ DEBUG("Add resource for `%s' (size = %zu)",
+ dentry->file_name_utf8,
+ lte->resource_entry.original_size);
+ copy_hash(lte->hash, attr_hash);
+ lookup_table_insert(lookup_table, lte);
+ }
+ if (actx->attr->name_length == 0) {
+ if (dentry->lte) {
+ ERROR("Found two un-named data streams for "
+ "`%s'", path);
+ ret = WIMLIB_ERR_NTFS_3G;
+ goto out_free_lte;
+ }
+ dentry->lte = lte;
+ } else {
+ struct ads_entry *new_ads_entry;
+ stream_name_utf8 = utf16_to_utf8((const u8*)attr_record_name(actx->attr),
+ actx->attr->name_length,
+ &stream_name_utf16_len);
+ if (!stream_name_utf8)
+ goto out_free_lte;
+ new_ads_entry = dentry_add_ads(dentry, stream_name_utf8);
+ FREE(stream_name_utf8);
+ if (!new_ads_entry)
+ goto out_free_lte;
+
+ new_ads_entry->lte = lte;
+ }
+ }
+ ret = 0;
+ goto out_put_actx;
+out_free_lte:
+ free_lookup_table_entry(lte);
+out_free_ntfs_loc:
+ if (ntfs_loc) {
+ FREE(ntfs_loc->path_utf8);
+ FREE(ntfs_loc->stream_name_utf16);
+ FREE(ntfs_loc);
+ }
+out_put_actx:
+ ntfs_attr_put_search_ctx(actx);
+ if (ret == 0)
+ DEBUG("Successfully captured NTFS streams from `%s'", path);
+ else
+ DEBUG("Failed to capture NTFS streams from `%s", path);
+ return ret;
+}
+
+struct readdir_ctx {
+ struct dentry *parent;
+ ntfs_inode *dir_ni;
+ char *path;
+ size_t path_len;
+ struct lookup_table *lookup_table;
+ struct sd_set *sd_set;
+ const struct capture_config *config;
+ ntfs_volume **ntfs_vol_p;
+};
+
+static int __build_dentry_tree_ntfs(struct dentry **root_p, ntfs_inode *ni,
+ char path[], size_t path_len,
+ struct lookup_table *lookup_table,
+ struct sd_set *sd_set,
+ const struct capture_config *config,
+ ntfs_volume **ntfs_vol_p);
+
+
+static int wim_ntfs_capture_filldir(void *dirent, const ntfschar *name,
+ const int name_len, const int name_type,
+ const s64 pos, const MFT_REF mref,
+ const unsigned dt_type)
+{
+ struct readdir_ctx *ctx;
+ size_t utf8_name_len;
+ char *utf8_name;
+ struct dentry *child = NULL;
+ int ret;
+ size_t path_len;
+
+ if (name_type == FILE_NAME_DOS)
+ return 0;
+
+ ret = -1;
+
+ utf8_name = utf16_to_utf8((const u8*)name, name_len * 2,
+ &utf8_name_len);
+ if (!utf8_name)
+ goto out;
+
+ if (utf8_name[0] == '.' &&
+ (utf8_name[1] == '\0' ||
+ (utf8_name[1] == '.' && utf8_name[2] == '\0'))) {
+ DEBUG("Skipping dentry `%s'", utf8_name);
+ ret = 0;
+ goto out_free_utf8_name;
+ }
+
+ DEBUG("Opening inode for `%s'", utf8_name);
+
+ ctx = dirent;
+
+ ntfs_inode *ni = ntfs_inode_open(ctx->dir_ni->vol, mref);
+ if (!ni) {
+ ERROR_WITH_ERRNO("Failed to open NTFS inode");
+ ret = 1;
+ }
+ path_len = ctx->path_len;
+ if (path_len != 1)
+ ctx->path[path_len++] = '/';
+ memcpy(ctx->path + path_len, utf8_name, utf8_name_len + 1);
+ path_len += utf8_name_len;
+ ret = __build_dentry_tree_ntfs(&child, ni, ctx->path, path_len,
+ ctx->lookup_table, ctx->sd_set,
+ ctx->config, ctx->ntfs_vol_p);
+
+ if (child) {
+ DEBUG("Linking dentry `%s' with parent `%s'",
+ child->file_name_utf8, ctx->parent->file_name_utf8);
+ link_dentry(child, ctx->parent);
+ }
+out_close_ni:
+ ntfs_inode_close(ni);
+out_free_utf8_name:
+ FREE(utf8_name);
+out:
+ return ret;
+}
+
+/* Recursively build a WIM dentry tree corresponding to a NTFS volume.
+ * At the same time, update the WIM lookup table with lookup table entries for
+ * the NTFS streams, and build an array of security descriptors.
+ */
+static int __build_dentry_tree_ntfs(struct dentry **root_p, ntfs_inode *ni,
+ char path[], size_t path_len,
+ struct lookup_table *lookup_table,
+ struct sd_set *sd_set,
+ const struct capture_config *config,
+ ntfs_volume **ntfs_vol_p)
+{
+ u32 attributes;
+ int mrec_flags;
+ u32 sd_size;
+ int ret = 0;
+ struct dentry *root;
+
+ if (exclude_path(path, config, false)) {
+ DEBUG("Excluding `%s' from capture", path);
+ return 0;
+ }
+
+ DEBUG("Starting recursive capture at path = `%s'", path);
+ mrec_flags = ni->mrec->flags;
+ attributes = ntfs_inode_get_attributes(ni);
+
+ root = new_dentry(path_basename(path));
+ if (!root)
+ return WIMLIB_ERR_NOMEM;
+
+ root->creation_time = le64_to_cpu(ni->creation_time);
+ root->last_write_time = le64_to_cpu(ni->last_data_change_time);
+ root->last_access_time = le64_to_cpu(ni->last_access_time);
+ root->security_id = le32_to_cpu(ni->security_id);
+ root->attributes = le32_to_cpu(attributes);
+ root->hard_link = ni->mft_no;
+ root->resolved = true;
+
+ if (attributes & FILE_ATTR_REPARSE_POINT) {
+ DEBUG("Reparse point `%s'", path);
+ /* Junction point, symbolic link, or other reparse point */
+ ret = capture_ntfs_streams(root, ni, path, path_len,
+ lookup_table, ntfs_vol_p,
+ AT_REPARSE_POINT);
+ } else if (mrec_flags & MFT_RECORD_IS_DIRECTORY) {
+ DEBUG("Directory `%s'", path);
+
+ /* Normal directory */
+ s64 pos = 0;
+ struct readdir_ctx ctx = {
+ .parent = root,
+ .dir_ni = ni,
+ .path = path,
+ .path_len = path_len,
+ .lookup_table = lookup_table,
+ .sd_set = sd_set,
+ .config = config,
+ .ntfs_vol_p = ntfs_vol_p,
+ };
+ ret = ntfs_readdir(ni, &pos, &ctx, wim_ntfs_capture_filldir);
+ if (ret != 0) {
+ ERROR_WITH_ERRNO("ntfs_readdir()");
+ ret = WIMLIB_ERR_NTFS_3G;
+ }
+ } else {
+ DEBUG("Normal file `%s'", path);
+ /* Normal file */
+ ret = capture_ntfs_streams(root, ni, path, path_len,
+ lookup_table, ntfs_vol_p,
+ AT_DATA);
+ }
+ if (ret != 0)
+ return ret;
+
+ ret = ntfs_inode_get_security(ni,
+ OWNER_SECURITY_INFORMATION |
+ GROUP_SECURITY_INFORMATION |
+ DACL_SECURITY_INFORMATION |
+ SACL_SECURITY_INFORMATION,
+ NULL, 0, &sd_size);
+ u8 sd[sd_size];
+ ret = ntfs_inode_get_security(ni,
+ OWNER_SECURITY_INFORMATION |
+ GROUP_SECURITY_INFORMATION |
+ DACL_SECURITY_INFORMATION |
+ SACL_SECURITY_INFORMATION,
+ sd, sd_size, &sd_size);
+ if (ret == 0) {
+ ERROR_WITH_ERRNO("Failed to get security information from "
+ "`%s'", path);
+ ret = WIMLIB_ERR_NTFS_3G;
+ } else {
+ if (ret > 0) {
+ /*print_security_descriptor(sd, sd_size);*/
+ root->security_id = sd_set_add_sd(sd_set, sd, sd_size);
+ DEBUG("Added security ID = %u for `%s'",
+ root->security_id, path);
+ } else {
+ root->security_id = -1;
+ DEBUG("No security ID for `%s'", path);
+ }
+ ret = 0;
+ }
+ *root_p = root;
+ return ret;
+}
+
+static int build_dentry_tree_ntfs(struct dentry **root_p,
+ const char *device,
+ struct lookup_table *lookup_table,
+ struct wim_security_data *sd,
+ const struct capture_config *config,
+ int flags,
+ void *extra_arg)
+{
+ ntfs_volume *vol;
+ ntfs_inode *root_ni;
+ int ret = 0;
+ struct sd_set tree;
+ tree.sd = sd;
+ tree.root = NULL;
+ ntfs_volume **ntfs_vol_p = extra_arg;
+
+ DEBUG("Mounting NTFS volume `%s' read-only", device);
+
+ vol = ntfs_mount(device, MS_RDONLY);
+ if (!vol) {
+ ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s' read-only",
+ device);
+ return WIMLIB_ERR_NTFS_3G;
+ }
+
+ NVolClearShowSysFiles(vol);
+
+ DEBUG("Opening root NTFS dentry");
+ root_ni = ntfs_inode_open(vol, FILE_root);
+ if (!root_ni) {
+ ERROR_WITH_ERRNO("Failed to open root inode of NTFS volume "
+ "`%s'", device);
+ ret = WIMLIB_ERR_NTFS_3G;
+ goto out;
+ }
+ char path[4096];
+ path[0] = '/';
+ path[1] = '\0';
+ ret = __build_dentry_tree_ntfs(root_p, root_ni, path, 1,
+ lookup_table, &tree, config,
+ ntfs_vol_p);
+ ntfs_inode_close(root_ni);
+
+out:
+ if (ret) {
+ if (ntfs_umount(vol, FALSE) != 0) {
+ ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'",
+ device);
+ if (ret == 0)
+ ret = WIMLIB_ERR_NTFS_3G;
+ }
+ } else {
+ *ntfs_vol_p = vol;
+ }
+ return ret;
+}
+
+
WIMLIBAPI int wimlib_add_image_from_ntfs_volume(WIMStruct *w,
const char *device,
const char *name,
- const char *description,
- const char *flags_element,
+ const char *config_str,
+ size_t config_len,
int flags)
{
- int ret;
-
- if (!device)
- return WIMLIB_ERR_INVALID_PARAM;
if (flags & (WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE)) {
ERROR("Cannot dereference files when capturing directly from NTFS");
return WIMLIB_ERR_INVALID_PARAM;
}
- return 0;
+ return do_add_image(w, device, name, config_str, config_len, flags,
+ build_dentry_tree_ntfs, &w->ntfs_vol);
}
#else /* WITH_NTFS_3G */
const char *name,
const char *description,
const char *flags_element,
- int flags)
+ int flags,
+ const char *config_str,
+ size_t config_len)
{
ERROR("wimlib was compiled without support for NTFS-3g, so");
ERROR("we cannot capture a WIM image directly from a NTFS volume");
git://wimlib.net / wimlib / blobdiff