Merge pull request #24 from zero-systems/master

Return error if authorization is required but credentials are not present

src/error.rs

@@ -62,6 +62,9 @@ pub enum Error {
     /// Password auth failure
     #[error("Password auth failure, code: {0}")]
     PasswordAuthFailure(u8),
+
+    #[error("Authorization required")]
+    AuthorizationRequired,
 }
 
 ///// Result type of `tokio-socks`

src/tcp.rs

@@ -385,6 +385,10 @@ where S: Stream<Item = Result<SocketAddr>> + Unpin
     }
 
     async fn password_authentication_protocol<T: AsyncRead + AsyncWrite + Unpin>(&mut self, tcp: &mut T) -> Result<()> {
+        if let Authentication::None = self.auth {
+            return Err(Error::AuthorizationRequired);
+        }
+
         self.prepare_send_password_auth();
         tcp.write_all(&self.buf[self.ptr..self.len]).await?;