memory: fixes encoding issues during encryption

src/test/test_memory_crypto.py

@@ -23,10 +23,16 @@
 
 from sat.test import helpers
 from sat.memory.crypto import BlockCipher, PasswordHasher
-from os import urandom
+import random
+import string
 from twisted.internet import defer
 
 
+def getRandomUnicode(len):
+    """Return a random unicode string"""
+    return u''.join(random.choice(string.letters + u"éáúóâêûôßüöä") for i in xrange(len))
+
+
 class CryptoTest(helpers.SatTestCase):
 
     def setUp(self):
@@ -42,9 +48,9 @@ class CryptoTest(helpers.SatTestCase):
             d_list.append(d)
 
         for key_len in (0, 2, 8, 10, 16, 24, 30, 32, 40):
-            key = urandom(key_len)
+            key = getRandomUnicode(key_len)
             for message_len in (0, 2, 16, 24, 32, 100):
-                message = urandom(message_len)
+                message = getRandomUnicode(message_len)
                 test(key, message)
         return defer.DeferredList(d_list)
 
@@ -57,7 +63,7 @@ class CryptoTest(helpers.SatTestCase):
                 d1 = PasswordHasher.verify(password, hashed)
                 d1.addCallback(lambda result: self.assertTrue(result))
                 d_list.append(d1)
-                attempt = urandom(10)
+                attempt = getRandomUnicode(10)
                 d2 = PasswordHasher.verify(attempt, hashed)
                 d2.addCallback(lambda result: self.assertFalse(result))
                 d_list.append(d2)