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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""Tests for the RC4 decrypter object."""
from __future__ import unicode_literals
import unittest
from cryptography.hazmat.primitives.ciphers import algorithms
from dfvfs.encryption import decrypter
from dfvfs.lib import definitions
from tests.encryption import test_lib
class DecrypterTestCase(test_lib.DecrypterTestCase):
"""Tests for the decrypter interface."""
def testInitialize(self):
"""Tests the __init__ method."""
test_decrypter = decrypter.Decrypter()
self.assertIsNotNone(test_decrypter)
with self.assertRaises(ValueError):
decrypter.Decrypter(key=b'test1')
class CryptographyBlockCipherDecrypterTest(test_lib.DecrypterTestCase):
"""Tests for the block cipher decrypter using Cryptography."""
_DES3_INITIALIZATION_VECTOR = b'This IV!'
_DES3_KEY = b'This is a key123'
def testInitialize(self):
"""Tests the __init__ method."""
algorithm = algorithms.TripleDES(self._DES3_KEY)
test_decrypter = decrypter.CryptographyBlockCipherDecrypter(
algorithm=algorithm, cipher_mode=definitions.ENCRYPTION_MODE_CBC,
initialization_vector=self._DES3_INITIALIZATION_VECTOR)
self.assertIsNotNone(test_decrypter)
test_decrypter = decrypter.CryptographyBlockCipherDecrypter(
algorithm=algorithm, cipher_mode=definitions.ENCRYPTION_MODE_CFB,
initialization_vector=self._DES3_INITIALIZATION_VECTOR)
self.assertIsNotNone(test_decrypter)
test_decrypter = decrypter.CryptographyBlockCipherDecrypter(
algorithm=algorithm, cipher_mode=definitions.ENCRYPTION_MODE_ECB)
self.assertIsNotNone(test_decrypter)
test_decrypter = decrypter.CryptographyBlockCipherDecrypter(
algorithm=algorithm, cipher_mode=definitions.ENCRYPTION_MODE_OFB,
initialization_vector=self._DES3_INITIALIZATION_VECTOR)
self.assertIsNotNone(test_decrypter)
with self.assertRaises(ValueError):
decrypter.CryptographyBlockCipherDecrypter(
algorithm=algorithm, cipher_mode=definitions.ENCRYPTION_MODE_CBC)
if __name__ == '__main__':
unittest.main()
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