From c0f3a2f841b00b399c87c4ea79c9f6db84930ea7 Mon Sep 17 00:00:00 2001
From: Carl Wallace <carl@redhoundsoftware.com>
Date: Wed, 20 Dec 2023 09:42:27 -0500
Subject: [PATCH] add length check to get_version (#545)

---
 src/transaction.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/transaction.rs b/src/transaction.rs
index 78ff3a9f..65140ad7 100644
--- a/src/transaction.rs
+++ b/src/transaction.rs
@@ -92,7 +92,7 @@ impl<'tx> Transaction<'tx> {
         // get version from device
         let response = Apdu::new(Ins::GetVersion).transmit(self, 261)?;
 
-        if !response.is_success() {
+        if !response.is_success() || response.data().is_empty() {
             return Err(Error::GenericError);
         }