struct wim_dentry *root;
const struct wim_lookup_table_entry *metadata_lte;
u64 metadata_len;
+ u8 hash[SHA1_HASH_SIZE];
metadata_lte = imd->metadata_lte;
metadata_len = wim_resource_size(metadata_lte);
if (ret)
goto out_free_buf;
+ sha1_buffer(buf, metadata_len, hash);
+ if (!hashes_equal(metadata_lte->hash, hash)) {
+ ERROR("Metadata resource is corrupted (invalid SHA-1 message digest)!");
+ ret = WIMLIB_ERR_INVALID_RESOURCE_HASH;
+ goto out_free_buf;
+ }
+
DEBUG("Finished reading metadata resource into memory.");
/* The root directory entry starts after security data, aligned on an
imd->security_data->total_length, root);
if (ret == 0 && root->length == 0) {
- ERROR("Metadata resource cannot begin with end-of-directory entry!");
- ret = WIMLIB_ERR_INVALID_DENTRY;
+ WARNING("Metadata resource begins with end-of-directory entry "
+ "(treating as empty image)");
+ FREE(root);
+ root = NULL;
+ goto out_success;
}
if (ret) {
DEBUG("Done reading image metadata");
+out_success:
imd->root_dentry = root;
INIT_LIST_HEAD(&imd->unhashed_streams);
goto out_free_buf;