From bfd935eb3fd3f87c86c3dd04fe84b67533245bd4 Mon Sep 17 00:00:00 2001
From: Physics <11247943+physics-sp@users.noreply.github.com>
Date: Thu, 26 Mar 2020 19:09:53 -0300
Subject: [PATCH] allow to hash an empty string

---
 sha1.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sha1.py b/sha1.py
index 5b01ddd..1b5d2ff 100755
--- a/sha1.py
+++ b/sha1.py
@@ -143,7 +143,7 @@ def _produce_digest(self):
         return _process_chunk(message[64:], *h)
 
 
-def sha1(data):
+def sha1(data=b''):
     """SHA-1 Hashing Function
 
     A custom SHA-1 hashing function implemented entirely in Python.