From 987ea0a964c5b5ef3a7d80ae5fd07bd9038252cb Mon Sep 17 00:00:00 2001
From: Scott Kitterman <scott@kitterman.com>
Date: Mon, 6 Apr 2020 17:43:16 -0400
Subject: [PATCH] Add test case for verifying a message with no signature

---
 dkim/tests/test_dkim.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/dkim/tests/test_dkim.py b/dkim/tests/test_dkim.py
index 9aa452c..83f4b7e 100644
--- a/dkim/tests/test_dkim.py
+++ b/dkim/tests/test_dkim.py
@@ -206,6 +206,11 @@ p=11qYAYKxCrfVS/7TyWQHOg7hcvPapiMlrwIaaPcHURo="""
                 res = dkim.verify(sig + self.message, dnsfunc=self.dnsfunc)
                 self.assertTrue(res)
 
+    def test_verifies_nosig(self):
+        # A message without signature does not verify.
+        res = dkim.verify(self.message, dnsfunc=self.dnsfunc)
+        self.assertFalse(res)
+
     def test_double_verifies(self):
         # A message also containing a ed25519 signature verifies after being signed with rsa.
         for header_algo in (b"simple", b"relaxed"):