from unittest import mock, 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 from django.test.utils import override_settings try: import crypt except ImportError: crypt = None else: # On some platforms (e.g. OpenBSD), crypt.crypt() always return None. if crypt.crypt('', '') is None: crypt = None try: import bcrypt except ImportError: bcrypt = None try: import argon2 except ImportError: argon2 = 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_pbkdf2(self): encoded = make_password('lètmein', 'seasalt', 'pbkdf2_sha256') self.assertEqual(encoded, 'pbkdf2_sha256$216000$seasalt$youGZxOw6ZOcfrXv2i8/AhrnpZflJJ9EshS9XmUJTUg=') self.assertTrue(is_password_usable(encoded)) self.assertTrue(check_password('lètmein', encoded)) self.assertFalse(check_password('lètmeinz', encoded)) self.assertEqual(identify_hasher(encoded).algorithm, "pbkdf2_sha256") # Blank passwords blank_encoded = make_password('', 'seasalt', 'pbkdf2_sha256') self.assertTrue(blank_encoded.startswith('pbkdf2_sha256$')) self.assertTrue(is_password_usable(blank_encoded)) self.assertTrue(check_password('', blank_encoded)) self.assertFalse(check_password(' ', blank_encoded)) @override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.SHA1PasswordHasher']) 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$')) self.assertTrue(is_password_usable(blank_encoded)) self.assertTrue(check_password('', blank_encoded)) self.assertFalse(check_password(' ', blank_encoded)) @override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.MD5PasswordHasher']) def test_md5(self): encoded = make_password('lètmein', 'seasalt', 'md5') self.assertEqual(encoded, 'md5$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)) @override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.UnsaltedMD5PasswordHasher']) 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$$%s" % encoded self.assertTrue(is_password_usable(alt_encoded)) self.assertTrue(check_password('lètmein', alt_encoded)) self.assertFalse(check_password('lètmeinz', alt_encoded)) # Blank passwords blank_encoded = make_password('', '', 'unsalted_md5') self.assertTrue(is_password_usable(blank_encoded)) self.assertTrue(check_password('', blank_encoded)) self.assertFalse(check_password(' ', blank_encoded)) @override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.UnsaltedSHA1PasswordHasher']) def test_unsalted_sha1(self): encoded = make_password('lètmein', '', 'unsalted_sha1') self.assertEqual(encoded, 'sha1$$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.") @override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.CryptPasswordHasher']) 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") # 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$')) self.assertTrue(is_password_usable(blank_encoded)) self.assertTrue(check_password('', blank_encoded)) self.assertFalse(check_password(' ', blank_encoded)) @skipUnless(bcrypt, "bcrypt not installed") @override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.BCryptPasswordHasher']) def test_bcrypt(self): encoded = make_password('lètmein', hasher='bcrypt') self.assertTrue(is_password_usable(encoded)) self.assertTrue(encoded.startswith('bcrypt$')) 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$')) self.assertTrue(is_password_usable(blank_encoded)) self.assertTrue(check_password('', blank_encoded)) self.assertFalse(check_password(' ', blank_encoded)) @skipUnless(bcrypt, "bcrypt not installed") @override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.BCryptPasswordHasher']) def test_bcrypt_upgrade(self): hasher = get_hasher('bcrypt') self.assertEqual('bcrypt', hasher.algorithm) self.assertNotEqual(hasher.rounds, 4) old_rounds = hasher.rounds try: # Generate a password with 4 rounds. hasher.rounds = 4 encoded = make_password('letmein', hasher='bcrypt') rounds = hasher.safe_summary(encoded)['work factor'] self.assertEqual(rounds, '04') state = {'upgraded': False} def setter(password): state['upgraded'] = True # No upgrade is triggered. self.assertTrue(check_password('letmein', encoded, setter, 'bcrypt')) self.assertFalse(state['upgraded']) # Revert to the old rounds count and ... hasher.rounds = old_rounds # ... check if the password would get updated to the new count. self.assertTrue(check_password('letmein', encoded, setter, 'bcrypt')) self.assertTrue(state['upgraded']) finally: hasher.rounds = old_rounds @skipUnless(bcrypt, "bcrypt not installed") @override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.BCryptPasswordHasher']) def test_bcrypt_harden_runtime(self): hasher = get_hasher('bcrypt') self.assertEqual('bcrypt', hasher.algorithm) with mock.patch.object(hasher, 'rounds', 4): encoded = make_password('letmein', hasher='bcrypt') with mock.patch.object(hasher, 'rounds', 6), \ mock.patch.object(hasher, 'encode', side_effect=hasher.encode): hasher.harden_runtime('wrong_password', encoded) # Increasing rounds from 4 to 6 means an increase of 4 in workload, # therefore hardening should run 3 times to make the timing the # same (the original encode() call already ran once). self.assertEqual(hasher.encode.call_count, 3) # Get the original salt (includes the original workload factor) algorithm, data = encoded.split('$', 1) expected_call = (('wrong_password', data[:29].encode()),) 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)) with self.assertRaisesMessage(ValueError, 'Unknown password hashing algorith'): 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): msg = ( "Unknown password hashing algorithm '%s'. Did you specify it in " "the PASSWORD_HASHERS setting?" ) with self.assertRaisesMessage(ValueError, msg % 'lolcat'): make_password('lètmein', hasher='lolcat') with self.assertRaisesMessage(ValueError, msg % 'lolcat'): identify_hasher('lolcat$salt$hash') def test_is_password_usable(self): passwords = ('lètmein_badencoded', '', None) for password in passwords: with self.subTest(password=password): self.assertIs(is_password_usable(password), True) def test_low_level_pbkdf2(self): hasher = PBKDF2PasswordHasher() encoded = hasher.encode('lètmein', 'seasalt2') self.assertEqual(encoded, 'pbkdf2_sha256$216000$seasalt2$gHyszNJ9lwTG5y3MQUjZe+OJmYVTBPl/y7bYq9dtk8M=') 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$216000$seasalt2$E1KH89wMKuPXrrQzifVcG4cBtiA=') self.assertTrue(hasher.verify('lètmein', encoded)) @override_settings( PASSWORD_HASHERS=[ 'django.contrib.auth.hashers.PBKDF2PasswordHasher', 'django.contrib.auth.hashers.SHA1PasswordHasher', 'django.contrib.auth.hashers.MD5PasswordHasher', ], ) def test_upgrade(self): self.assertEqual('pbkdf2_sha256', get_hasher('default').algorithm) for algo in ('sha1', 'md5'): with self.subTest(algo=algo): encoded = make_password('lètmein', hasher=algo) state = {'upgraded': False} def setter(password): state['upgraded'] = True self.assertTrue(check_password('lètmein', encoded, setter)) self.assertTrue(state['upgraded']) def test_no_upgrade(self): encoded = make_password('lètmein') state = {'upgraded': False} def setter(): state['upgraded'] = True self.assertFalse(check_password('WRONG', encoded, setter)) self.assertFalse(state['upgraded']) @override_settings( PASSWORD_HASHERS=[ 'django.contrib.auth.hashers.PBKDF2PasswordHasher', 'django.contrib.auth.hashers.SHA1PasswordHasher', 'django.contrib.auth.hashers.MD5PasswordHasher', ], ) def test_no_upgrade_on_incorrect_pass(self): self.assertEqual('pbkdf2_sha256', get_hasher('default').algorithm) for algo in ('sha1', 'md5'): with self.subTest(algo=algo): encoded = make_password('lètmein', hasher=algo) state = {'upgraded': False} def setter(): state['upgraded'] = True self.assertFalse(check_password('WRONG', encoded, setter)) self.assertFalse(state['upgraded']) def test_pbkdf2_upgrade(self): hasher = get_hasher('default') self.assertEqual('pbkdf2_sha256', hasher.algorithm) self.assertNotEqual(hasher.iterations, 1) old_iterations = hasher.iterations try: # Generate a password with 1 iteration. hasher.iterations = 1 encoded = make_password('letmein') algo, iterations, salt, hash = encoded.split('$', 3) self.assertEqual(iterations, '1') state = {'upgraded': False} def setter(password): state['upgraded'] = True # 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') # 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) class BasePasswordHasherTests(SimpleTestCase): not_implemented_msg = 'subclasses of BasePasswordHasher must provide %s() method' def setUp(self): self.hasher = BasePasswordHasher() def test_load_library_no_algorithm(self): msg = "Hasher 'BasePasswordHasher' doesn't specify a library attribute" with self.assertRaisesMessage(ValueError, msg): self.hasher._load_library() def test_load_library_importerror(self): PlainHasher = type('PlainHasher', (BasePasswordHasher,), {'algorithm': 'plain', 'library': 'plain'}) msg = "Couldn't load 'PlainHasher' algorithm library: No module named 'plain'" with self.assertRaisesMessage(ValueError, msg): PlainHasher()._load_library() def test_attributes(self): self.assertIsNone(self.hasher.algorithm) self.assertIsNone(self.hasher.library) def test_encode(self): msg = self.not_implemented_msg % 'an encode' with self.assertRaisesMessage(NotImplementedError, msg): self.hasher.encode('password', 'salt') def test_harden_runtime(self): msg = 'subclasses of BasePasswordHasher should provide a harden_runtime() method' with self.assertWarns(Warning, msg=msg): self.hasher.harden_runtime('password', 'encoded') def test_must_update(self): self.assertIs(self.hasher.must_update('encoded'), False) def test_safe_summary(self): msg = self.not_implemented_msg % 'a safe_summary' with self.assertRaisesMessage(NotImplementedError, msg): self.hasher.safe_summary('encoded') def test_verify(self): msg = self.not_implemented_msg % 'a verify' with self.assertRaisesMessage(NotImplementedError, msg): self.hasher.verify('password', 'encoded') @skipUnless(argon2, "argon2-cffi not installed") @override_settings(PASSWORD_HASHERS=PASSWORD_HASHERS) class TestUtilsHashPassArgon2(SimpleTestCase): def test_argon2(self): encoded = make_password('lètmein', hasher='argon2') self.assertTrue(is_password_usable(encoded)) self.assertTrue(encoded.startswith('argon2$')) self.assertTrue(check_password('lètmein', encoded)) self.assertFalse(check_password('lètmeinz', encoded)) self.assertEqual(identify_hasher(encoded).algorithm, 'argon2') # Blank passwords blank_encoded = make_password('', hasher='argon2') self.assertTrue(blank_encoded.startswith('argon2$')) self.assertTrue(is_password_usable(blank_encoded)) self.assertTrue(check_password('', blank_encoded)) self.assertFalse(check_password(' ', blank_encoded)) # Old hashes without version attribute encoded = ( 'argon2$argon2i$m=8,t=1,p=1$c29tZXNhbHQ$gwQOXSNhxiOxPOA0+PY10P9QFO' '4NAYysnqRt1GSQLE55m+2GYDt9FEjPMHhP2Cuf0nOEXXMocVrsJAtNSsKyfg' ) self.assertTrue(check_password('secret', encoded)) self.assertFalse(check_password('wrong', encoded)) def test_argon2_upgrade(self): self._test_argon2_upgrade('time_cost', 'time cost', 1) self._test_argon2_upgrade('memory_cost', 'memory cost', 16) self._test_argon2_upgrade('parallelism', 'parallelism', 1) def test_argon2_version_upgrade(self): hasher = get_hasher('argon2') state = {'upgraded': False} encoded = ( 'argon2$argon2i$m=8,t=1,p=1$c29tZXNhbHQ$gwQOXSNhxiOxPOA0+PY10P9QFO' '4NAYysnqRt1GSQLE55m+2GYDt9FEjPMHhP2Cuf0nOEXXMocVrsJAtNSsKyfg' ) def setter(password): state['upgraded'] = True old_m = hasher.memory_cost old_t = hasher.time_cost old_p = hasher.parallelism try: hasher.memory_cost = 8 hasher.time_cost = 1 hasher.parallelism = 1 self.assertTrue(check_password('secret', encoded, setter, 'argon2')) self.assertTrue(state['upgraded']) finally: hasher.memory_cost = old_m hasher.time_cost = old_t hasher.parallelism = old_p def _test_argon2_upgrade(self, attr, summary_key, new_value): hasher = get_hasher('argon2') self.assertEqual('argon2', hasher.algorithm) self.assertNotEqual(getattr(hasher, attr), new_value) old_value = getattr(hasher, attr) try: # Generate hash with attr set to 1 setattr(hasher, attr, new_value) encoded = make_password('letmein', hasher='argon2') attr_value = hasher.safe_summary(encoded)[summary_key] self.assertEqual(attr_value, new_value) state = {'upgraded': False} def setter(password): state['upgraded'] = True # No upgrade is triggered. self.assertTrue(check_password('letmein', encoded, setter, 'argon2')) self.assertFalse(state['upgraded']) # Revert to the old rounds count and ... setattr(hasher, attr, old_value) # ... check if the password would get updated to the new count. self.assertTrue(check_password('letmein', encoded, setter, 'argon2')) self.assertTrue(state['upgraded']) finally: setattr(hasher, attr, old_value)