From 19fd5102cba1e581d6bfab78c5a26ef5819b36af Mon Sep 17 00:00:00 2001
From: Michal Nazarewicz <mina86@mina86.com>
Date: Wed, 13 Mar 2019 00:39:49 +0000
Subject: [PATCH] Remove unnecessary dependency on pyca
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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Python’s built-in hashlib is capable of calculating SHA1.  There’s
no need to depend on a third party library which may or may not be
available.
---
 pwned.py | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/pwned.py b/pwned.py
index ecc8359..b2e1f0b 100644
--- a/pwned.py
+++ b/pwned.py
@@ -1,18 +1,10 @@
+import hashlib
 import requests
-import cryptography
-from base64 import b16encode
 import sys
-from cryptography.hazmat.backends import default_backend
-from cryptography.hazmat.primitives import hashes
 
-def hash_password_sha1_hex(pwd):
-    digest = hashes.Hash(hashes.SHA1(), backend=default_backend())
-    digest.update(pwd.encode('ASCII'))
-    sha1 = b16encode(digest.finalize()).decode('ASCII')
-    return sha1
 
 def lookup_pwned_api(pwd):
-    sha1pwd = hash_password_sha1_hex(pwd)
+    sha1pwd = hashlib.sha1(pwd.encode('ascii')).hexdigest().upper()
     head = sha1pwd[:5]
     tail = sha1pwd[5:]
 
@@ -32,4 +24,4 @@ if (api_return):
 else:
     print (sys.argv[1], "was not found")
 
-exit()
\ No newline at end of file
+exit()