always pass bytes to hashlib

newsletter/models.py

@@ -18,6 +18,7 @@ from django.template import loader
 from django.template.loader import render_to_string
 from django.conf import settings
 
+from django.utils.encoding import force_bytes
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext
 from django.utils.translation import ugettext_lazy as _
@@ -42,7 +43,7 @@ class Subscriber(models.Model) :
             self.send_confirmation_email()
 
     def send_confirmation_email(self):
-        self.password = hashlib.sha1(str(random.random())).hexdigest()
+        self.password = hashlib.sha1(force_bytes(str(random.random()))).hexdigest()
         confirm_subject = loader.get_template('newsletter/confirmation_email_subject.txt')
         confirm_body = loader.get_template('newsletter/confirmation_email_body.txt')
         context = {'token': self.password}