Report decryption error

binding.h

@@ -161,7 +161,7 @@ struct CResult_____c_char generate_key(void);
 
 struct CResult_u8 zip_backup(char *key, char *dst_dir);
 
-void unzip_backup(char *key, char *data_path, char *dst_dir);
+struct CResult_u8 unzip_backup(char *key, char *data_path, char *dst_dir);
 
 struct CResult_____c_char split_data(uint32_t id, char *data);
 

src/api/dart_ffi.rs

@@ -682,16 +682,16 @@ pub unsafe extern "C" fn unzip_backup(
     key: *mut c_char,
     data_path: *mut c_char,
     dst_dir: *mut c_char,
-) {
+) -> CResult<u8> {
     from_c_str!(key);
     from_c_str!(data_path);
     from_c_str!(dst_dir);
     let res = || {
         let backup = FullEncryptedBackup::new(&dst_dir);
         backup.restore(&key, &data_path)?;
-        Ok(())
+        Ok(0)
     };
-    log_error(res())
+    to_cresult(res())
 }
 
 #[no_mangle]

src/db/backup.rs

@@ -60,13 +60,14 @@ impl FullEncryptedBackup {
         let mut f = File::open(data_path)?;
         f.read_to_end(&mut cipher_text)?;
 
-        let decryptor = match age::Decryptor::new(&*cipher_text)? {
+        let decryptor = match age::Decryptor::new(&*cipher_text).map_err(|_| anyhow!("Decryption Error"))? {
             age::Decryptor::Recipients(d) => d,
             _ => unreachable!(),
         };
 
         let mut plain_text = vec![];
-        let mut reader = decryptor.decrypt(iter::once(&key as &dyn age::Identity))?;
+        let mut reader = decryptor.decrypt(iter::once(&key as &dyn age::Identity))
+            .map_err(|_| anyhow!("Decryption Error"))?;
         reader.read_to_end(&mut plain_text)?;
 
         self.unzip(&plain_text)?;