diff --git a/services/backup/blob_client/src/tools.rs b/services/backup/blob_client/src/tools.rs
--- a/services/backup/blob_client/src/tools.rs
+++ b/services/backup/blob_client/src/tools.rs
@@ -1,3 +1,6 @@
+use libc;
+use libc::c_char;
+use std::ffi::{CStr, CString};
 use std::sync::{Arc, Mutex};
 use tracing::error;
 
@@ -17,7 +20,9 @@
   error!("could not access error messages");
 }
 
-pub fn check_error(error_messages: &Arc<Mutex<Vec<String>>>) -> Result<(), String> {
+pub fn check_error(
+  error_messages: &Arc<Mutex<Vec<String>>>,
+) -> Result<(), String> {
   if let Ok(errors) = error_messages.lock() {
     return match errors.is_empty() {
       true => Ok(()),
@@ -26,3 +31,13 @@
   }
   Err("could not access error messages".to_string())
 }
+
+pub fn c_char_pointer_to_string(c_char_pointer: *const c_char) -> String {
+  let holder_cstr: &CStr = unsafe { CStr::from_ptr(c_char_pointer) };
+  return holder_cstr.to_str().unwrap().to_owned();
+}
+
+pub fn string_to_c_char_pointer(signs: &String) -> *const c_char {
+  let result = CString::new((&signs).as_bytes()).unwrap();
+  result.as_ptr()
+}