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from __future__ import unicode_literals
import binascii
import hashlib
import unittest
from django.utils.crypto import constant_time_compare, pbkdf2
class TestUtilsCryptoMisc(unittest.TestCase):
def test_constant_time_compare(self):
# It's hard to test for constant time, just test the result.
self.assertTrue(constant_time_compare(b'spam', b'spam'))
self.assertFalse(constant_time_compare(b'spam', b'eggs'))
self.assertTrue(constant_time_compare('spam', 'spam'))
self.assertFalse(constant_time_compare('spam', 'eggs'))
class TestUtilsCryptoPBKDF2(unittest.TestCase):
# http://tools.ietf.org/html/draft-josefsson-pbkdf2-test-vectors-06
rfc_vectors = [
{
"args": {
"password": "password",
"salt": "salt",
"iterations": 1,
"dklen": 20,
"digest": hashlib.sha1,
},
"result": "0c60c80f961f0e71f3a9b524af6012062fe037a6",
},
{
"args": {
"password": "password",
"salt": "salt",
"iterations": 2,
"dklen": 20,
"digest": hashlib.sha1,
},
"result": "ea6c014dc72d6f8ccd1ed92ace1d41f0d8de8957",
},
{
"args": {
"password": "password",
"salt": "salt",
"iterations": 4096,
"dklen": 20,
"digest": hashlib.sha1,
},
"result": "4b007901b765489abead49d926f721d065a429c1",
},
# # this takes way too long :(
# {
# "args": {
# "password": "password",
# "salt": "salt",
# "iterations": 16777216,
# "dklen": 20,
# "digest": hashlib.sha1,
# },
# "result": "eefe3d61cd4da4e4e9945b3d6ba2158c2634e984",
# },
{
"args": {
"password": "passwordPASSWORDpassword",
"salt": "saltSALTsaltSALTsaltSALTsaltSALTsalt",
"iterations": 4096,
"dklen": 25,
"digest": hashlib.sha1,
},
"result": "3d2eec4fe41c849b80c8d83662c0e44a8b291a964cf2f07038",
},
{
"args": {
"password": "pass\0word",
"salt": "sa\0lt",
"iterations": 4096,
"dklen": 16,
"digest": hashlib.sha1,
},
"result": "56fa6aa75548099dcc37d7f03425e0c3",
},
]
regression_vectors = [
{
"args": {
"password": "password",
"salt": "salt",
"iterations": 1,
"dklen": 20,
"digest": hashlib.sha256,
},
"result": "120fb6cffcf8b32c43e7225256c4f837a86548c9",
},
{
"args": {
"password": "password",
"salt": "salt",
"iterations": 1,
"dklen": 20,
"digest": hashlib.sha512,
},
"result": "867f70cf1ade02cff3752599a3a53dc4af34c7a6",
},
{
"args": {
"password": "password",
"salt": "salt",
"iterations": 1000,
"dklen": 0,
"digest": hashlib.sha512,
},
"result": ("afe6c5530785b6cc6b1c6453384731bd5ee432ee"
"549fd42fb6695779ad8a1c5bf59de69c48f774ef"
"c4007d5298f9033c0241d5ab69305e7b64eceeb8d"
"834cfec"),
},
# Check leading zeros are not stripped (#17481)
{
"args": {
"password": b'\xba',
"salt": "salt",
"iterations": 1,
"dklen": 20,
"digest": hashlib.sha1,
},
"result": '0053d3b91a7f1e54effebd6d68771e8a6e0b2c5b',
},
]
def test_public_vectors(self):
for vector in self.rfc_vectors:
result = pbkdf2(**vector['args'])
self.assertEqual(binascii.hexlify(result).decode('ascii'),
vector['result'])
def test_regression_vectors(self):
for vector in self.regression_vectors:
result = pbkdf2(**vector['args'])
self.assertEqual(binascii.hexlify(result).decode('ascii'),
vector['result'])
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