Properly use base64 for request headers

This wasn't needed for requests-kerberos because pykerberos
automatically base64 encodes and decodes messages from Kerberos, which
is a behavior I do not like at all.

Signed-off-by: Robbie Harwood <[email protected]>

Author: frozencemetery

requests_gssapi/gssapi_.py

@@ -1,6 +1,8 @@
 import re
 import logging
 
+from base64 import b64encode, b64decode
+
 import gssapi
 
 from requests.auth import AuthBase
@@ -73,7 +75,7 @@ def _negotiate_value(response):
     if authreq:
         match_obj = regex.search(authreq)
         if match_obj:
-            return match_obj.group(1)
+            return b64decode(match_obj.group(1))
 
     return None
 
@@ -144,7 +146,7 @@ def generate_request_header(self, response, host, is_preemptive=False):
                 gss_response = self.context[host].step(
                     _negotiate_value(response))
 
-            return "Negotiate {0}".format(gss_response)
+            return "Negotiate {0}".format(b64encode(gss_response).decode())
 
         except gssapi.exceptions.GSSError as error:
             msg = error.gen_message()