Check key and iv length. Handle variable key length ciphers

[oss/ctypescrypto.git] / tests / testcipher.py

diff --git a/tests/testcipher.py b/tests/testcipher.py
index ae74d412dd44c2befb829ef885c6457750502003..de426cba665f50d988009b7c08f375c065301222 100644 (file)
--- a/tests/testcipher.py
+++ b/tests/testcipher.py
@@ -64,8 +64,28 @@ class TestEncryptDecrypt(unittest.TestCase):
                enc=c.update(data)+c.finish()
                # See if padding is added by default
                self.assertEqual(len(enc),len(data))
-               d=cipher.new("AES-256-OFB",decryptkey)
+               d=cipher.new("AES-256-OFB",decryptkey,encrypt=False)
                dec=d.update(enc)+d.finish()
                self.assertEqual(data,dec)
+       def test_wrong_keylength(self):
+               data="sdfsdfxxx"
+               key="abcdabcd"
+               with self.assertRaises(ValueError):
+                       c=cipher.new("AES-128-OFB",key)
+       def test_wrong_ivlength(self):
+               key="abcdabcdabcdabcd"
+               iv="xxxxx"
+               with self.assertRaises(ValueError):
+                       c=cipher.new("AES-128-OFB",key,iv=iv)
+       def test_variable_keylength(self):
+               encryptkey="abcdefabcdef"
+               data="asdfsdfsdfsdfsdfsdfsdfsdf"
+               iv="abcdefgh"
+               c=cipher.new("bf-ofb",encryptkey,iv=iv)
+               ciphertext=c.update(data)+c.finish()
+               decryptkey=encryptkey[0:5]+encryptkey[5:]
+               d=cipher.new("bf-ofb",decryptkey,iv=iv)
+               deciph=d.update(ciphertext)+d.finish()
+               self.assertEqual(deciph,data)
 if __name__ == '__main__':
        unittest.main()