+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);
+
+struct sd_tree {
+ u32 num_sds;
+ struct wim_security_data *sd;
+ struct sd_node *root;
+};
+
+struct sd_node {
+ int security_id;
+ u8 hash[SHA1_HASH_SIZE];
+ struct sd_node *left;
+ struct sd_node *right;
+};
+
+static void free_sd_tree(struct sd_node *root)
+{
+ if (root) {
+ free_sd_tree(root->left);
+ free_sd_tree(root->right);
+ FREE(root);
+ }
+}
+
+static void insert_sd_node(struct sd_node *new, struct sd_node *root)
+{
+ int cmp = hashes_cmp(root->hash, new->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);
+ }
+}
+
+static int lookup_sd(const u8 hash[SHA1_HASH_SIZE], struct sd_node *node)
+{
+ int cmp;
+ if (!node)
+ return -1;
+ cmp = hashes_cmp(hash, node->hash);
+ if (cmp < 0)
+ return lookup_sd(hash, node->left);
+ else if (cmp > 0)
+ return lookup_sd(hash, node->right);
+ else
+ return node->security_id;
+}
+
+static int tree_add_sd(struct sd_tree *tree, 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 = tree->sd;
+ sha1_buffer(descriptor, size, hash);
+
+ security_id = lookup_sd(hash, tree->root);
+ if (security_id >= 0)
+ return security_id;
+
+ new = MALLOC(sizeof(struct sd_node));
+ if (!new)
+ return -1;
+ descr_copy = MALLOC(size);
+ if (!descr_copy)
+ goto out_free_node;
+ memcpy(descr_copy, descriptor, size);
+ new->security_id = tree->num_sds++;
+ 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 + 8;
+
+ if (tree->root)
+ insert_sd_node(tree->root, new);
+ else
+ tree->root = new;
+ return new->security_id;
+out_free_descr:
+ FREE(descr_copy);
+out_free_node:
+ FREE(new);
+ return -1;
+}
+
+#if 0
+static int build_sd_tree(struct wim_security_data *sd, struct sd_tree *tree)
+{
+ int ret;
+ u32 orig_num_entries = sd->num_entries;
+ u32 orig_total_length = sd->total_length;
+
+ tree->num_sds = 0;
+ tree->sd = sd;
+ tree->root = NULL;
+
+ for (u32 i = 0; i < sd->num_entries; i++) {
+ ret = tree_add_sd(tree, sd->descriptors[i], sd->sizes[i]);
+ if (ret < 0)
+ goto out_revert;
+ }
+ return 0;
+out_revert:
+ sd->num_entries = orig_num_entries;
+ sd->total_length = orig_total_length;
+ free_sd_tree(tree->root);
+ return ret;
+}
+#endif
+
+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,
+ (ntfschar*)((u8*)ar + le16_to_cpu(ar->name_offset)),
+ 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);
+
+ 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 a normal file in the NTFS volume into the WIM lookup table */
+static int capture_normal_ntfs_file(struct dentry *dentry, ntfs_inode *ni,
+ char path[], size_t path_len,
+ struct lookup_table *lookup_table,
+ ntfs_volume **ntfs_vol_p)
+{
+
+ ntfs_attr_search_ctx *actx;
+ u8 attr_hash[SHA1_HASH_SIZE];
+ struct ntfs_location *ntfs_loc;
+ struct lookup_table_entry *lte;
+ int ret = 0;
+
+ actx = ntfs_attr_get_search_ctx(ni, NULL);
+ if (!actx) {
+ ERROR_WITH_ERRNO("Cannot get attribute search "
+ "context");
+ return WIMLIB_ERR_NTFS_3G;
+ }
+ while (!ntfs_attr_lookup(AT_DATA, NULL, 0,
+ CASE_SENSITIVE, 0, NULL, 0, actx))
+ {
+ ret = ntfs_attr_sha1sum(ni, actx->attr, attr_hash);
+ if (ret != 0)
+ goto out_put_actx;
+ lte = __lookup_resource(lookup_table, attr_hash);
+ if (lte) {
+ lte->refcnt++;
+ } else {
+ struct ntfs_location *ntfs_loc;
+
+ ret = WIMLIB_ERR_NOMEM;
+
+ ntfs_loc = CALLOC(1, sizeof(*ntfs_loc));
+ if (!ntfs_loc) {
+ goto out_put_actx;
+ }
+ ntfs_loc->path_utf8 = MALLOC(path_len + 1);
+ if (!ntfs_loc->path_utf8)
+ goto out_put_actx;
+ 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_put_actx;
+ memcpy(ntfs_loc->stream_name_utf16,
+ (u8*)actx->attr +
+ le16_to_cpu(actx->attr->name_offset),
+ actx->attr->name_length * 2);
+
+ ntfs_loc->stream_name_utf16_num_chars = actx->attr->name_length;
+ lte = new_lookup_table_entry();
+ if (!lte)
+ goto out_put_actx;
+ 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;
+ copy_hash(lte->hash, attr_hash);
+ lookup_table_insert(lookup_table, lte);
+ }
+ dentry->lte = lte;
+ }
+ goto out_put_actx;
+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);
+ return ret;
+}
+
+static int __build_dentry_tree_ntfs(struct dentry *dentry, ntfs_inode *ni,
+ char path[], size_t path_len,
+ struct lookup_table *lookup_table,
+ struct sd_tree *tree,
+ ntfs_volume **ntfs_vol_p)
+{
+ u32 attributes = ntfs_inode_get_attributes(ni);
+ int mrec_flags = ni->mrec->flags;
+ u32 sd_size;
+ int ret = 0;
+
+ dentry->creation_time = le64_to_cpu(ni->creation_time);
+ dentry->last_write_time = le64_to_cpu(ni->last_data_change_time);
+ dentry->last_access_time = le64_to_cpu(ni->last_access_time);
+ dentry->security_id = le32_to_cpu(ni->security_id);
+ dentry->attributes = le32_to_cpu(attributes);
+ dentry->resolved = true;
+
+ if (attributes & FILE_ATTR_REPARSE_POINT) {
+ /* Junction point, symbolic link, or other reparse point */
+ } else if (mrec_flags & MFT_RECORD_IS_DIRECTORY) {
+ /* Normal directory */
+ } else {
+ /* Normal file */
+ ret = capture_normal_ntfs_file(dentry, ni, path, path_len,
+ lookup_table, ntfs_vol_p);
+ }
+ 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);
+ dentry->security_id = tree_add_sd(tree, sd, sd_size);
+ return 0;
+}
+
+static int build_dentry_tree_ntfs(struct dentry *root_dentry,
+ const char *device,
+ struct lookup_table *lookup_table,
+ struct wim_security_data *sd,
+ int flags,
+ void *extra_arg)
+{
+ ntfs_volume *vol;
+ ntfs_inode *root_ni;
+ int ret = 0;
+ struct sd_tree tree;
+ tree.sd = sd;
+ tree.root = NULL;
+ ntfs_volume **ntfs_vol_p = extra_arg;
+
+ 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;
+ }
+ 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_dentry, root_ni, path, 1,
+ lookup_table, &tree, ntfs_vol_p);
+ ntfs_inode_close(root_ni);
+
+out:
+ if (ntfs_umount(vol, FALSE) != 0) {
+ ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", device);
+ if (ret == 0)
+ ret = WIMLIB_ERR_NTFS_3G;
+ }
+ return ret;
+}
git://wimlib.net / wimlib / blobdiff