add zip_util.rs

src/pgp_util.rs

@@ -52,6 +52,9 @@ impl OpenPGPTool {
     }
 
     pub fn encrypt_file(&self, from_file: &str, to_file: &str, armor: bool) -> XResult<()> {
+        if !Path::new(from_file).exists() {
+            return Err(new_box_error(&format!("From file NOT exists: {}", from_file)));
+        }
         if Path::new(to_file).exists() {
             return Err(new_box_error(&format!("To file exists: {}", to_file)));
         }
@@ -63,17 +66,18 @@ impl OpenPGPTool {
                 None => return Err(new_box_error("Encryption key not found in TPK")),
                 Some(r) => r,
             };
+        let bw = BufWriter::new(File::create(to_file)?);
         let message = if armor {
-            Message::new(armor::Writer::new(std::io::stdout(), armor::Kind::Message, &[])?)
+            Message::new(armor::Writer::new(bw, armor::Kind::Message, &[])?)
         } else {
-            Message::new(BufWriter::new(File::create(to_file)?))
+            Message::new(bw)
         };
         let encryptor = Encryptor::for_recipient(message, recipient).build()?;
         let mut pgp_encrypt_writer = LiteralWriter::new(encryptor).build()?;
         let mut from = File::open(from_file)?;
         encrypt_read_write(&mut from, &mut pgp_encrypt_writer)?;
         pgp_encrypt_writer.finalize()?;
-                                    
+
         Ok(())
     }
 }