From 7498bf51d85f98d67d72193dc01db2afb83aeaf3 Mon Sep 17 00:00:00 2001
From: Simeon Simeonov
Date: Fri, 4 Dec 2020 12:36:58 +0100
Subject: Raise exceptions from except properly

---
 otp2289/generator.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'otp2289/generator.py')

diff --git a/otp2289/generator.py b/otp2289/generator.py
index 723ed04..5ea738b 100644
--- a/otp2289/generator.py
+++ b/otp2289/generator.py
@@ -407,7 +407,7 @@ class OTPGenerator:
             hash_algo, step, seed = challenge[4:].split()
             return (seed, hash_algo, int(step))
         except ValueError:
-            raise OTPChallengeException('Invalid challenge')
+            raise OTPChallengeException('Invalid challenge') from None
 
     @staticmethod
     def sha1_digest_folding(sha1_digest):
@@ -506,7 +506,7 @@ class OTPGenerator:
                           tokens]
         except ValueError:
             raise OTPGeneratorException(
-                'One or more words not present in RFC1760')
+                'One or more words not present in RFC1760') from None
         # now we build a string of bits
         bit_stream = format(token_ints[0], '011b')
         bit_stream += format(token_ints[1], '011b')
-- 
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