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"""passlib.tests -- unittests for passlib.crypto.des"""
#=============================================================================
# imports
#=============================================================================
from __future__ import with_statement, division
# core
from functools import partial
# site
# pkg
# module
from passlib.utils import getrandbytes
from passlib.tests.utils import TestCase
#=============================================================================
# test DES routines
#=============================================================================
class DesTest(TestCase):
descriptionPrefix = "passlib.crypto.des"
# test vectors taken from http://www.skepticfiles.org/faq/testdes.htm
des_test_vectors = [
# key, plaintext, ciphertext
(0x0000000000000000, 0x0000000000000000, 0x8CA64DE9C1B123A7),
(0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF, 0x7359B2163E4EDC58),
(0x3000000000000000, 0x1000000000000001, 0x958E6E627A05557B),
(0x1111111111111111, 0x1111111111111111, 0xF40379AB9E0EC533),
(0x0123456789ABCDEF, 0x1111111111111111, 0x17668DFC7292532D),
(0x1111111111111111, 0x0123456789ABCDEF, 0x8A5AE1F81AB8F2DD),
(0x0000000000000000, 0x0000000000000000, 0x8CA64DE9C1B123A7),
(0xFEDCBA9876543210, 0x0123456789ABCDEF, 0xED39D950FA74BCC4),
(0x7CA110454A1A6E57, 0x01A1D6D039776742, 0x690F5B0D9A26939B),
(0x0131D9619DC1376E, 0x5CD54CA83DEF57DA, 0x7A389D10354BD271),
(0x07A1133E4A0B2686, 0x0248D43806F67172, 0x868EBB51CAB4599A),
(0x3849674C2602319E, 0x51454B582DDF440A, 0x7178876E01F19B2A),
(0x04B915BA43FEB5B6, 0x42FD443059577FA2, 0xAF37FB421F8C4095),
(0x0113B970FD34F2CE, 0x059B5E0851CF143A, 0x86A560F10EC6D85B),
(0x0170F175468FB5E6, 0x0756D8E0774761D2, 0x0CD3DA020021DC09),
(0x43297FAD38E373FE, 0x762514B829BF486A, 0xEA676B2CB7DB2B7A),
(0x07A7137045DA2A16, 0x3BDD119049372802, 0xDFD64A815CAF1A0F),
(0x04689104C2FD3B2F, 0x26955F6835AF609A, 0x5C513C9C4886C088),
(0x37D06BB516CB7546, 0x164D5E404F275232, 0x0A2AEEAE3FF4AB77),
(0x1F08260D1AC2465E, 0x6B056E18759F5CCA, 0xEF1BF03E5DFA575A),
(0x584023641ABA6176, 0x004BD6EF09176062, 0x88BF0DB6D70DEE56),
(0x025816164629B007, 0x480D39006EE762F2, 0xA1F9915541020B56),
(0x49793EBC79B3258F, 0x437540C8698F3CFA, 0x6FBF1CAFCFFD0556),
(0x4FB05E1515AB73A7, 0x072D43A077075292, 0x2F22E49BAB7CA1AC),
(0x49E95D6D4CA229BF, 0x02FE55778117F12A, 0x5A6B612CC26CCE4A),
(0x018310DC409B26D6, 0x1D9D5C5018F728C2, 0x5F4C038ED12B2E41),
(0x1C587F1C13924FEF, 0x305532286D6F295A, 0x63FAC0D034D9F793),
(0x0101010101010101, 0x0123456789ABCDEF, 0x617B3A0CE8F07100),
(0x1F1F1F1F0E0E0E0E, 0x0123456789ABCDEF, 0xDB958605F8C8C606),
(0xE0FEE0FEF1FEF1FE, 0x0123456789ABCDEF, 0xEDBFD1C66C29CCC7),
(0x0000000000000000, 0xFFFFFFFFFFFFFFFF, 0x355550B2150E2451),
(0xFFFFFFFFFFFFFFFF, 0x0000000000000000, 0xCAAAAF4DEAF1DBAE),
(0x0123456789ABCDEF, 0x0000000000000000, 0xD5D44FF720683D0D),
(0xFEDCBA9876543210, 0xFFFFFFFFFFFFFFFF, 0x2A2BB008DF97C2F2),
]
def test_01_expand(self):
"""expand_des_key()"""
from passlib.crypto.des import expand_des_key, shrink_des_key, \
_KDATA_MASK, INT_56_MASK
# make sure test vectors are preserved (sans parity bits)
# uses ints, bytes are tested under # 02
for key1, _, _ in self.des_test_vectors:
key2 = shrink_des_key(key1)
key3 = expand_des_key(key2)
# NOTE: this assumes expand_des_key() sets parity bits to 0
self.assertEqual(key3, key1 & _KDATA_MASK)
# type checks
self.assertRaises(TypeError, expand_des_key, 1.0)
# too large
self.assertRaises(ValueError, expand_des_key, INT_56_MASK+1)
self.assertRaises(ValueError, expand_des_key, b"\x00"*8)
# too small
self.assertRaises(ValueError, expand_des_key, -1)
self.assertRaises(ValueError, expand_des_key, b"\x00"*6)
def test_02_shrink(self):
"""shrink_des_key()"""
from passlib.crypto.des import expand_des_key, shrink_des_key, INT_64_MASK
rng = self.getRandom()
# make sure reverse works for some random keys
# uses bytes, ints are tested under # 01
for i in range(20):
key1 = getrandbytes(rng, 7)
key2 = expand_des_key(key1)
key3 = shrink_des_key(key2)
self.assertEqual(key3, key1)
# type checks
self.assertRaises(TypeError, shrink_des_key, 1.0)
# too large
self.assertRaises(ValueError, shrink_des_key, INT_64_MASK+1)
self.assertRaises(ValueError, shrink_des_key, b"\x00"*9)
# too small
self.assertRaises(ValueError, shrink_des_key, -1)
self.assertRaises(ValueError, shrink_des_key, b"\x00"*7)
def _random_parity(self, key):
"""randomize parity bits"""
from passlib.crypto.des import _KDATA_MASK, _KPARITY_MASK, INT_64_MASK
rng = self.getRandom()
return (key & _KDATA_MASK) | (rng.randint(0,INT_64_MASK) & _KPARITY_MASK)
def test_03_encrypt_bytes(self):
"""des_encrypt_block()"""
from passlib.crypto.des import (des_encrypt_block, shrink_des_key,
_pack64, _unpack64)
# run through test vectors
for key, plaintext, correct in self.des_test_vectors:
# convert to bytes
key = _pack64(key)
plaintext = _pack64(plaintext)
correct = _pack64(correct)
# test 64-bit key
result = des_encrypt_block(key, plaintext)
self.assertEqual(result, correct, "key=%r plaintext=%r:" %
(key, plaintext))
# test 56-bit version
key2 = shrink_des_key(key)
result = des_encrypt_block(key2, plaintext)
self.assertEqual(result, correct, "key=%r shrink(key)=%r plaintext=%r:" %
(key, key2, plaintext))
# test with random parity bits
for _ in range(20):
key3 = _pack64(self._random_parity(_unpack64(key)))
result = des_encrypt_block(key3, plaintext)
self.assertEqual(result, correct, "key=%r rndparity(key)=%r plaintext=%r:" %
(key, key3, plaintext))
# check invalid keys
stub = b'\x00' * 8
self.assertRaises(TypeError, des_encrypt_block, 0, stub)
self.assertRaises(ValueError, des_encrypt_block, b'\x00'*6, stub)
# check invalid input
self.assertRaises(TypeError, des_encrypt_block, stub, 0)
self.assertRaises(ValueError, des_encrypt_block, stub, b'\x00'*7)
# check invalid salts
self.assertRaises(ValueError, des_encrypt_block, stub, stub, salt=-1)
self.assertRaises(ValueError, des_encrypt_block, stub, stub, salt=1<<24)
# check invalid rounds
self.assertRaises(ValueError, des_encrypt_block, stub, stub, 0, rounds=0)
def test_04_encrypt_ints(self):
"""des_encrypt_int_block()"""
from passlib.crypto.des import des_encrypt_int_block
# run through test vectors
for key, plaintext, correct in self.des_test_vectors:
# test 64-bit key
result = des_encrypt_int_block(key, plaintext)
self.assertEqual(result, correct, "key=%r plaintext=%r:" %
(key, plaintext))
# test with random parity bits
for _ in range(20):
key3 = self._random_parity(key)
result = des_encrypt_int_block(key3, plaintext)
self.assertEqual(result, correct, "key=%r rndparity(key)=%r plaintext=%r:" %
(key, key3, plaintext))
# check invalid keys
self.assertRaises(TypeError, des_encrypt_int_block, b'\x00', 0)
self.assertRaises(ValueError, des_encrypt_int_block, -1, 0)
# check invalid input
self.assertRaises(TypeError, des_encrypt_int_block, 0, b'\x00')
self.assertRaises(ValueError, des_encrypt_int_block, 0, -1)
# check invalid salts
self.assertRaises(ValueError, des_encrypt_int_block, 0, 0, salt=-1)
self.assertRaises(ValueError, des_encrypt_int_block, 0, 0, salt=1<<24)
# check invalid rounds
self.assertRaises(ValueError, des_encrypt_int_block, 0, 0, 0, rounds=0)
#=============================================================================
# eof
#=============================================================================