From 7815126f65c840951e3d718b183b40825e5021c4 Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@freedombone.net>
Date: Thu, 15 Aug 2019 18:09:17 +0100
Subject: [PATCH] Exception handling for http signature check

---
 httpsig.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/httpsig.py b/httpsig.py
index 1564fee0..c50c2d90 100644
--- a/httpsig.py
+++ b/httpsig.py
@@ -117,8 +117,12 @@ def verifyPostHeaders(httpPrefix: str, publicKeyPem: str, headers: dict, \
                 base64.b64encode(SHA256.new(messageBodyJsonStr.encode()).digest())
             signedHeaderList.append(f'digest: SHA-256={bodyDigest}')
         else:
-            signedHeaderList.append(
-                f'{signedHeader}: {headers[signedHeader]}')
+            try:
+                signedHeaderList.append(
+                    f'{signedHeader}: {headers[signedHeader]}')
+            except Exception as e:
+                print('http signature check failure')
+                print(e)
 
     # Now we have our header data digest
     signedHeaderText = '\n'.join(signedHeaderList)