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#!/usr/bin/env python
from __future__ import absolute_import
"""
Unit tests for M2Crypto.BIO.
Copyright (c) 1999-2003 Ng Pheng Siong. All rights reserved.
Copyright (c) 2006 Open Source Applications Foundation
Author: Heikki Toivonen
"""
import logging
from M2Crypto import BIO, Rand, six
from tests import unittest
from tests.fips import fips_mode
log = logging.getLogger('test_bio')
ciphers = [
'des_ede_ecb', 'des_ede_cbc', 'des_ede_cfb', 'des_ede_ofb',
'des_ede3_ecb', 'des_ede3_cbc', 'des_ede3_cfb', 'des_ede3_ofb',
'aes_128_ecb', 'aes_128_cbc', 'aes_128_cfb', 'aes_128_ofb',
'aes_192_ecb', 'aes_192_cbc', 'aes_192_cfb', 'aes_192_ofb',
'aes_256_ecb', 'aes_256_cbc', 'aes_256_cfb', 'aes_256_ofb']
nonfips_ciphers = ['bf_ecb', 'bf_cbc', 'bf_cfb', 'bf_ofb',
# 'idea_ecb', 'idea_cbc', 'idea_cfb', 'idea_ofb',
'cast5_ecb', 'cast5_cbc', 'cast5_cfb', 'cast5_ofb',
# 'rc5_ecb', 'rc5_cbc', 'rc5_cfb', 'rc5_ofb',
'des_ecb', 'des_cbc', 'des_cfb', 'des_ofb',
'rc4', 'rc2_40_cbc']
if not fips_mode: # Forbidden ciphers
ciphers += nonfips_ciphers
class CipherStreamTestCase(unittest.TestCase):
def try_algo(self, algo):
data = b'123456789012345678901234'
my_key = 3 * 15 * b"key"
my_IV = 3 * 16 * b'IV'
# Encrypt.
mem = BIO.MemoryBuffer()
cf = BIO.CipherStream(mem)
cf.set_cipher(algo, my_key, my_IV, 1)
cf.write(data)
cf.flush()
cf.write_close()
cf.close()
ciphertext = mem.read()
# Decrypt.
mem = BIO.MemoryBuffer(ciphertext)
cf = BIO.CipherStream(mem)
cf.set_cipher(algo, my_key, my_IV, 0)
cf.write_close()
data2 = cf.read()
cf.close()
self.assertFalse(cf.readable())
with self.assertRaises(IOError):
cf.read()
with self.assertRaises(IOError):
cf.readline()
with self.assertRaises(IOError):
cf.readlines()
self.assertEqual(data, data2,
'%s algorithm cipher test failed' % algo)
@unittest.skipUnless(six.PY34, "Doesn't support subTest")
def test_algo(self):
for algo in ciphers:
with self.subTest(algo=algo):
self.try_algo(algo)
def test_nosuchalgo(self):
with self.assertRaises(ValueError):
self.try_algo('nosuchalgo4567')
def suite():
return unittest.TestLoader().loadTestsFromTestCase(CipherStreamTestCase)
if __name__ == '__main__':
Rand.load_file('randpool.dat', -1)
unittest.TextTestRunner().run(suite())
Rand.save_file('randpool.dat')
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