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# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from unittest import skipUnless
from django.conf.global_settings import PASSWORD_HASHERS
from django.contrib.auth.hashers import (
UNUSABLE_PASSWORD_PREFIX, UNUSABLE_PASSWORD_SUFFIX_LENGTH,
BasePasswordHasher, PBKDF2PasswordHasher, PBKDF2SHA1PasswordHasher,
check_password, get_hasher, identify_hasher, is_password_usable,
make_password,
)
from django.test import SimpleTestCase, mock
from django.test.utils import override_settings
from django.utils import six
from django.utils.encoding import force_bytes
try:
import crypt
except ImportError:
crypt = None
try:
import bcrypt
except ImportError:
bcrypt = None
class PBKDF2SingleIterationHasher(PBKDF2PasswordHasher):
iterations = 1
@override_settings(PASSWORD_HASHERS=PASSWORD_HASHERS)
class TestUtilsHashPass(SimpleTestCase):
def test_simple(self):
encoded = make_password('lètmein')
self.assertTrue(encoded.startswith('pbkdf2_sha256$'))
self.assertTrue(is_password_usable(encoded))
self.assertTrue(check_password('lètmein', encoded))
self.assertFalse(check_password('lètmeinz', encoded))
# Blank passwords
blank_encoded = make_password('')
self.assertTrue(blank_encoded.startswith('pbkdf2_sha256$'))
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password('', blank_encoded))
self.assertFalse(check_password(' ', blank_encoded))
def test_pkbdf2(self):
encoded = make_password('lètmein', 'seasalt', 'pbkdf2_sha256')
self.assertEqual(encoded,
'pbkdf2_sha256$20000$seasalt$oBSd886ysm3AqYun62DOdin8YcfbU1z9cksZSuLP9r0=')
self.assertTrue(is_password_usable(encoded))
self.assertTrue(check_password('lètmein', encoded))
self.assertFalse(check_password('lètmeinz', encoded))
self.assertEqual(identify_hasher(encoded).algorithm, "pbkdf2_sha256")
# Blank passwords
blank_encoded = make_password('', 'seasalt', 'pbkdf2_sha256')
self.assertTrue(blank_encoded.startswith('pbkdf2_sha256$'))
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password('', blank_encoded))
self.assertFalse(check_password(' ', blank_encoded))
def test_sha1(self):
encoded = make_password('lètmein', 'seasalt', 'sha1')
self.assertEqual(encoded,
'sha1$seasalt$cff36ea83f5706ce9aa7454e63e431fc726b2dc8')
self.assertTrue(is_password_usable(encoded))
self.assertTrue(check_password('lètmein', encoded))
self.assertFalse(check_password('lètmeinz', encoded))
self.assertEqual(identify_hasher(encoded).algorithm, "sha1")
# Blank passwords
blank_encoded = make_password('', 'seasalt', 'sha1')
self.assertTrue(blank_encoded.startswith('sha1$'))
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password('', blank_encoded))
self.assertFalse(check_password(' ', blank_encoded))
def test_md5(self):
encoded = make_password('lètmein', 'seasalt', 'md5')
self.assertEqual(encoded,
'md5$seasalt$3f86d0d3d465b7b458c231bf3555c0e3')
self.assertTrue(is_password_usable(encoded))
self.assertTrue(check_password('lètmein', encoded))
self.assertFalse(check_password('lètmeinz', encoded))
self.assertEqual(identify_hasher(encoded).algorithm, "md5")
# Blank passwords
blank_encoded = make_password('', 'seasalt', 'md5')
self.assertTrue(blank_encoded.startswith('md5$'))
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password('', blank_encoded))
self.assertFalse(check_password(' ', blank_encoded))
def test_unsalted_md5(self):
encoded = make_password('lètmein', '', 'unsalted_md5')
self.assertEqual(encoded, '88a434c88cca4e900f7874cd98123f43')
self.assertTrue(is_password_usable(encoded))
self.assertTrue(check_password('lètmein', encoded))
self.assertFalse(check_password('lètmeinz', encoded))
self.assertEqual(identify_hasher(encoded).algorithm, "unsalted_md5")
# Alternate unsalted syntax
alt_encoded = "md5$$%s" % encoded
self.assertTrue(is_password_usable(alt_encoded))
self.assertTrue(check_password('lètmein', alt_encoded))
self.assertFalse(check_password('lètmeinz', alt_encoded))
# Blank passwords
blank_encoded = make_password('', '', 'unsalted_md5')
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password('', blank_encoded))
self.assertFalse(check_password(' ', blank_encoded))
def test_unsalted_sha1(self):
encoded = make_password('lètmein', '', 'unsalted_sha1')
self.assertEqual(encoded, 'sha1$$6d138ca3ae545631b3abd71a4f076ce759c5700b')
self.assertTrue(is_password_usable(encoded))
self.assertTrue(check_password('lètmein', encoded))
self.assertFalse(check_password('lètmeinz', encoded))
self.assertEqual(identify_hasher(encoded).algorithm, "unsalted_sha1")
# Raw SHA1 isn't acceptable
alt_encoded = encoded[6:]
self.assertFalse(check_password('lètmein', alt_encoded))
# Blank passwords
blank_encoded = make_password('', '', 'unsalted_sha1')
self.assertTrue(blank_encoded.startswith('sha1$'))
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password('', blank_encoded))
self.assertFalse(check_password(' ', blank_encoded))
@skipUnless(crypt, "no crypt module to generate password.")
def test_crypt(self):
encoded = make_password('lètmei', 'ab', 'crypt')
self.assertEqual(encoded, 'crypt$$ab1Hv2Lg7ltQo')
self.assertTrue(is_password_usable(encoded))
self.assertTrue(check_password('lètmei', encoded))
self.assertFalse(check_password('lètmeiz', encoded))
self.assertEqual(identify_hasher(encoded).algorithm, "crypt")
# Blank passwords
blank_encoded = make_password('', 'ab', 'crypt')
self.assertTrue(blank_encoded.startswith('crypt$'))
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password('', blank_encoded))
self.assertFalse(check_password(' ', blank_encoded))
@skipUnless(bcrypt, "bcrypt not installed")
def test_bcrypt_sha256(self):
encoded = make_password('lètmein', hasher='bcrypt_sha256')
self.assertTrue(is_password_usable(encoded))
self.assertTrue(encoded.startswith('bcrypt_sha256$'))
self.assertTrue(check_password('lètmein', encoded))
self.assertFalse(check_password('lètmeinz', encoded))
self.assertEqual(identify_hasher(encoded).algorithm, "bcrypt_sha256")
# Verify that password truncation no longer works
password = ('VSK0UYV6FFQVZ0KG88DYN9WADAADZO1CTSIVDJUNZSUML6IBX7LN7ZS3R5'
'JGB3RGZ7VI7G7DJQ9NI8BQFSRPTG6UWTTVESA5ZPUN')
encoded = make_password(password, hasher='bcrypt_sha256')
self.assertTrue(check_password(password, encoded))
self.assertFalse(check_password(password[:72], encoded))
# Blank passwords
blank_encoded = make_password('', hasher='bcrypt_sha256')
self.assertTrue(blank_encoded.startswith('bcrypt_sha256$'))
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password('', blank_encoded))
self.assertFalse(check_password(' ', blank_encoded))
@skipUnless(bcrypt, "bcrypt not installed")
def test_bcrypt(self):
encoded = make_password('lètmein', hasher='bcrypt')
self.assertTrue(is_password_usable(encoded))
self.assertTrue(encoded.startswith('bcrypt$'))
self.assertTrue(check_password('lètmein', encoded))
self.assertFalse(check_password('lètmeinz', encoded))
self.assertEqual(identify_hasher(encoded).algorithm, "bcrypt")
# Blank passwords
blank_encoded = make_password('', hasher='bcrypt')
self.assertTrue(blank_encoded.startswith('bcrypt$'))
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password('', blank_encoded))
self.assertFalse(check_password(' ', blank_encoded))
@skipUnless(bcrypt, "bcrypt not installed")
def test_bcrypt_harden_runtime(self):
hasher = get_hasher('bcrypt')
self.assertEqual('bcrypt', hasher.algorithm)
with mock.patch.object(hasher, 'rounds', 4):
encoded = make_password('letmein', hasher='bcrypt')
with mock.patch.object(hasher, 'rounds', 6), \
mock.patch.object(hasher, 'encode', side_effect=hasher.encode):
hasher.harden_runtime('wrong_password', encoded)
# Increasing rounds from 4 to 6 means an increase of 4 in workload,
# therefore hardening should run 3 times to make the timing the
# same (the original encode() call already ran once).
self.assertEqual(hasher.encode.call_count, 3)
# Get the original salt (includes the original workload factor)
algorithm, data = encoded.split('$', 1)
expected_call = (('wrong_password', force_bytes(data[:29])),)
self.assertEqual(hasher.encode.call_args_list, [expected_call] * 3)
def test_unusable(self):
encoded = make_password(None)
self.assertEqual(len(encoded), len(UNUSABLE_PASSWORD_PREFIX) + UNUSABLE_PASSWORD_SUFFIX_LENGTH)
self.assertFalse(is_password_usable(encoded))
self.assertFalse(check_password(None, encoded))
self.assertFalse(check_password(encoded, encoded))
self.assertFalse(check_password(UNUSABLE_PASSWORD_PREFIX, encoded))
self.assertFalse(check_password('', encoded))
self.assertFalse(check_password('lètmein', encoded))
self.assertFalse(check_password('lètmeinz', encoded))
self.assertRaises(ValueError, identify_hasher, encoded)
# Assert that the unusable passwords actually contain a random part.
# This might fail one day due to a hash collision.
self.assertNotEqual(encoded, make_password(None), "Random password collision?")
def test_unspecified_password(self):
"""
Makes sure specifying no plain password with a valid encoded password
returns `False`.
"""
self.assertFalse(check_password(None, make_password('lètmein')))
def test_bad_algorithm(self):
with self.assertRaises(ValueError):
make_password('lètmein', hasher='lolcat')
self.assertRaises(ValueError, identify_hasher, "lolcat$salt$hash")
def test_bad_encoded(self):
self.assertFalse(is_password_usable('lètmein_badencoded'))
self.assertFalse(is_password_usable(''))
def test_low_level_pkbdf2(self):
hasher = PBKDF2PasswordHasher()
encoded = hasher.encode('lètmein', 'seasalt2')
self.assertEqual(encoded,
'pbkdf2_sha256$20000$seasalt2$Flpve/uAcyo6+IFI6YAhjeABGPVbRQjzHDxRhqxewgw=')
self.assertTrue(hasher.verify('lètmein', encoded))
def test_low_level_pbkdf2_sha1(self):
hasher = PBKDF2SHA1PasswordHasher()
encoded = hasher.encode('lètmein', 'seasalt2')
self.assertEqual(encoded,
'pbkdf2_sha1$20000$seasalt2$pJt86NmjAweBY1StBvxCu7l1o9o=')
self.assertTrue(hasher.verify('lètmein', encoded))
def test_upgrade(self):
self.assertEqual('pbkdf2_sha256', get_hasher('default').algorithm)
for algo in ('sha1', 'md5'):
encoded = make_password('lètmein', hasher=algo)
state = {'upgraded': False}
def setter(password):
state['upgraded'] = True
self.assertTrue(check_password('lètmein', encoded, setter))
self.assertTrue(state['upgraded'])
def test_no_upgrade(self):
encoded = make_password('lètmein')
state = {'upgraded': False}
def setter():
state['upgraded'] = True
self.assertFalse(check_password('WRONG', encoded, setter))
self.assertFalse(state['upgraded'])
def test_no_upgrade_on_incorrect_pass(self):
self.assertEqual('pbkdf2_sha256', get_hasher('default').algorithm)
for algo in ('sha1', 'md5'):
encoded = make_password('lètmein', hasher=algo)
state = {'upgraded': False}
def setter():
state['upgraded'] = True
self.assertFalse(check_password('WRONG', encoded, setter))
self.assertFalse(state['upgraded'])
def test_pbkdf2_upgrade(self):
hasher = get_hasher('default')
self.assertEqual('pbkdf2_sha256', hasher.algorithm)
self.assertNotEqual(hasher.iterations, 1)
old_iterations = hasher.iterations
try:
# Generate a password with 1 iteration.
hasher.iterations = 1
encoded = make_password('letmein')
algo, iterations, salt, hash = encoded.split('$', 3)
self.assertEqual(iterations, '1')
state = {'upgraded': False}
def setter(password):
state['upgraded'] = True
# Check that no upgrade is triggered
self.assertTrue(check_password('letmein', encoded, setter))
self.assertFalse(state['upgraded'])
# Revert to the old iteration count and ...
hasher.iterations = old_iterations
# ... check if the password would get updated to the new iteration count.
self.assertTrue(check_password('letmein', encoded, setter))
self.assertTrue(state['upgraded'])
finally:
hasher.iterations = old_iterations
def test_pbkdf2_harden_runtime(self):
hasher = get_hasher('default')
self.assertEqual('pbkdf2_sha256', hasher.algorithm)
with mock.patch.object(hasher, 'iterations', 1):
encoded = make_password('letmein')
with mock.patch.object(hasher, 'iterations', 6), \
mock.patch.object(hasher, 'encode', side_effect=hasher.encode):
hasher.harden_runtime('wrong_password', encoded)
# Encode should get called once ...
self.assertEqual(hasher.encode.call_count, 1)
# ... with the original salt and 5 iterations.
algorithm, iterations, salt, hash = encoded.split('$', 3)
expected_call = (('wrong_password', salt, 5),)
self.assertEqual(hasher.encode.call_args, expected_call)
def test_pbkdf2_upgrade_new_hasher(self):
hasher = get_hasher('default')
self.assertEqual('pbkdf2_sha256', hasher.algorithm)
self.assertNotEqual(hasher.iterations, 1)
state = {'upgraded': False}
def setter(password):
state['upgraded'] = True
with self.settings(PASSWORD_HASHERS=[
'auth_tests.test_hashers.PBKDF2SingleIterationHasher']):
encoded = make_password('letmein')
algo, iterations, salt, hash = encoded.split('$', 3)
self.assertEqual(iterations, '1')
# Check that no upgrade is triggered
self.assertTrue(check_password('letmein', encoded, setter))
self.assertFalse(state['upgraded'])
# Revert to the old iteration count and check if the password would get
# updated to the new iteration count.
with self.settings(PASSWORD_HASHERS=[
'django.contrib.auth.hashers.PBKDF2PasswordHasher',
'auth_tests.test_hashers.PBKDF2SingleIterationHasher']):
self.assertTrue(check_password('letmein', encoded, setter))
self.assertTrue(state['upgraded'])
def test_check_password_calls_harden_runtime(self):
hasher = get_hasher('default')
encoded = make_password('letmein')
with mock.patch.object(hasher, 'harden_runtime'), \
mock.patch.object(hasher, 'must_update', return_value=True):
# Correct password supplied, no hardening needed
check_password('letmein', encoded)
self.assertEqual(hasher.harden_runtime.call_count, 0)
# Wrong password supplied, hardening needed
check_password('wrong_password', encoded)
self.assertEqual(hasher.harden_runtime.call_count, 1)
def test_load_library_no_algorithm(self):
with self.assertRaises(ValueError) as e:
BasePasswordHasher()._load_library()
self.assertEqual("Hasher 'BasePasswordHasher' doesn't specify a "
"library attribute", str(e.exception))
def test_load_library_importerror(self):
PlainHasher = type(str('PlainHasher'), (BasePasswordHasher,),
{'algorithm': 'plain', 'library': 'plain'})
# Python 3.3 adds quotes around module name
with six.assertRaisesRegex(self, ValueError,
"Couldn't load 'PlainHasher' algorithm library: No module named '?plain'?"):
PlainHasher()._load_library()
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