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django/tests/auth_tests/test_hashers.py

719 lines
28 KiB
Python

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,
BCryptPasswordHasher,
BCryptSHA256PasswordHasher,
MD5PasswordHasher,
PBKDF2PasswordHasher,
PBKDF2SHA1PasswordHasher,
ScryptPasswordHasher,
acheck_password,
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 bcrypt
except ImportError:
bcrypt = None
try:
import argon2
except ImportError:
argon2 = None
# scrypt requires OpenSSL 1.1+
try:
import hashlib
scrypt = hashlib.scrypt
except ImportError:
scrypt = 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))
async def test_acheck_password(self):
encoded = make_password("lètmein")
self.assertIs(await acheck_password("lètmein", encoded), True)
self.assertIs(await acheck_password("lètmeinz", encoded), False)
# Blank passwords.
blank_encoded = make_password("")
self.assertIs(await acheck_password("", blank_encoded), True)
self.assertIs(await acheck_password(" ", blank_encoded), False)
def test_bytes(self):
encoded = make_password(b"bytes_password")
self.assertTrue(encoded.startswith("pbkdf2_sha256$"))
self.assertIs(is_password_usable(encoded), True)
self.assertIs(check_password(b"bytes_password", encoded), True)
def test_invalid_password(self):
msg = "Password must be a string or bytes, got int."
with self.assertRaisesMessage(TypeError, msg):
make_password(1)
def test_pbkdf2(self):
encoded = make_password("lètmein", "seasalt", "pbkdf2_sha256")
self.assertEqual(
encoded,
"pbkdf2_sha256$870000$seasalt$wJSpLMQRQz0Dhj/pFpbyjMj71B2gUYp6HJS5AU+32Ac=",
)
self.assertTrue(is_password_usable(encoded))
self.assertTrue(check_password("lètmein", encoded))
self.assertFalse(check_password("lètmeinz", encoded))
self.assertEqual(identify_hasher(encoded).algorithm, "pbkdf2_sha256")
# Blank passwords
blank_encoded = make_password("", "seasalt", "pbkdf2_sha256")
self.assertTrue(blank_encoded.startswith("pbkdf2_sha256$"))
self.assertTrue(is_password_usable(blank_encoded))
self.assertTrue(check_password("", blank_encoded))
self.assertFalse(check_password(" ", blank_encoded))
# Salt entropy check.
hasher = get_hasher("pbkdf2_sha256")
encoded_weak_salt = make_password("lètmein", "iodizedsalt", "pbkdf2_sha256")
encoded_strong_salt = make_password("lètmein", hasher.salt(), "pbkdf2_sha256")
self.assertIs(hasher.must_update(encoded_weak_salt), True)
self.assertIs(hasher.must_update(encoded_strong_salt), False)
@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))
# Salt entropy check.
hasher = get_hasher("md5")
encoded_weak_salt = make_password("lètmein", "iodizedsalt", "md5")
encoded_strong_salt = make_password("lètmein", hasher.salt(), "md5")
self.assertIs(hasher.must_update(encoded_weak_salt), True)
self.assertIs(hasher.must_update(encoded_strong_salt), False)
@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, 4)
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("$", 1)
expected_call = (("wrong_password", data[:29].encode()),)
self.assertEqual(hasher.encode.call_args_list, [expected_call] * 3)
def test_unusable(self):
encoded = make_password(None)
self.assertEqual(
len(encoded),
len(UNUSABLE_PASSWORD_PREFIX) + UNUSABLE_PASSWORD_SUFFIX_LENGTH,
)
self.assertFalse(is_password_usable(encoded))
self.assertFalse(check_password(None, encoded))
self.assertFalse(check_password(encoded, encoded))
self.assertFalse(check_password(UNUSABLE_PASSWORD_PREFIX, encoded))
self.assertFalse(check_password("", encoded))
self.assertFalse(check_password("lètmein", encoded))
self.assertFalse(check_password("lètmeinz", encoded))
with self.assertRaisesMessage(ValueError, "Unknown password hashing algorithm"):
identify_hasher(encoded)
# Assert that the unusable passwords actually contain a random part.
# This might fail one day due to a hash collision.
self.assertNotEqual(encoded, make_password(None), "Random password collision?")
def test_unspecified_password(self):
"""
Makes sure specifying no plain password with a valid encoded password
returns `False`.
"""
self.assertFalse(check_password(None, make_password("lètmein")))
def test_bad_algorithm(self):
msg = (
"Unknown password hashing algorithm '%s'. Did you specify it in "
"the PASSWORD_HASHERS setting?"
)
with self.assertRaisesMessage(ValueError, msg % "lolcat"):
make_password("lètmein", hasher="lolcat")
with self.assertRaisesMessage(ValueError, msg % "lolcat"):
identify_hasher("lolcat$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$870000$"
"seasalt2$nxgnNHRsZWSmi4hRSKq2MRigfaRmjDhH1NH4g2sQRbU=",
)
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$870000$seasalt2$iFPKnrkYfxxyxaeIqxq+c3nJ/j4="
)
self.assertTrue(hasher.verify("lètmein", encoded))
@skipUnless(bcrypt, "bcrypt not installed")
def test_bcrypt_salt_check(self):
hasher = BCryptPasswordHasher()
encoded = hasher.encode("lètmein", hasher.salt())
self.assertIs(hasher.must_update(encoded), False)
@skipUnless(bcrypt, "bcrypt not installed")
def test_bcryptsha256_salt_check(self):
hasher = BCryptSHA256PasswordHasher()
encoded = hasher.encode("lètmein", hasher.salt())
self.assertIs(hasher.must_update(encoded), False)
@override_settings(
PASSWORD_HASHERS=[
"django.contrib.auth.hashers.PBKDF2PasswordHasher",
"django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher",
"django.contrib.auth.hashers.MD5PasswordHasher",
],
)
def test_upgrade(self):
self.assertEqual("pbkdf2_sha256", get_hasher("default").algorithm)
for algo in ("pbkdf2_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.PBKDF2SHA1PasswordHasher",
"django.contrib.auth.hashers.MD5PasswordHasher",
],
)
def test_no_upgrade_on_incorrect_pass(self):
self.assertEqual("pbkdf2_sha256", get_hasher("default").algorithm)
for algo in ("pbkdf2_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)
def test_encode_invalid_salt(self):
hasher_classes = [
MD5PasswordHasher,
PBKDF2PasswordHasher,
PBKDF2SHA1PasswordHasher,
ScryptPasswordHasher,
]
msg = "salt must be provided and cannot contain $."
for hasher_class in hasher_classes:
hasher = hasher_class()
for salt in [None, "", "sea$salt"]:
with self.subTest(hasher_class.__name__, salt=salt):
with self.assertRaisesMessage(ValueError, msg):
hasher.encode("password", salt)
def test_encode_password_required(self):
hasher_classes = [
MD5PasswordHasher,
PBKDF2PasswordHasher,
PBKDF2SHA1PasswordHasher,
ScryptPasswordHasher,
]
msg = "password must be provided."
for hasher_class in hasher_classes:
hasher = hasher_class()
with self.subTest(hasher_class.__name__):
with self.assertRaisesMessage(TypeError, msg):
hasher.encode(None, "seasalt")
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_decode(self):
msg = self.not_implemented_msg % "a decode"
with self.assertRaisesMessage(NotImplementedError, msg):
self.hasher.decode("encoded")
def test_harden_runtime(self):
msg = (
"subclasses of BasePasswordHasher should provide a harden_runtime() method"
)
with self.assertWarnsMessage(Warning, 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$argon2id$"))
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$argon2id$"))
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))
# Old hashes with version attribute.
encoded = "argon2$argon2i$v=19$m=8,t=1,p=1$c2FsdHNhbHQ$YC9+jJCrQhs5R6db7LlN8Q"
self.assertIs(check_password("secret", encoded), True)
self.assertIs(check_password("wrong", encoded), False)
# Salt entropy check.
hasher = get_hasher("argon2")
encoded_weak_salt = make_password("lètmein", "iodizedsalt", "argon2")
encoded_strong_salt = make_password("lètmein", hasher.salt(), "argon2")
self.assertIs(hasher.must_update(encoded_weak_salt), True)
self.assertIs(hasher.must_update(encoded_strong_salt), False)
def test_argon2_decode(self):
salt = "abcdefghijk"
encoded = make_password("lètmein", salt=salt, hasher="argon2")
hasher = get_hasher("argon2")
decoded = hasher.decode(encoded)
self.assertEqual(decoded["memory_cost"], hasher.memory_cost)
self.assertEqual(decoded["parallelism"], hasher.parallelism)
self.assertEqual(decoded["salt"], salt)
self.assertEqual(decoded["time_cost"], hasher.time_cost)
def test_argon2_upgrade(self):
self._test_argon2_upgrade("time_cost", "time cost", 1)
self._test_argon2_upgrade("memory_cost", "memory cost", 64)
self._test_argon2_upgrade("parallelism", "parallelism", 1)
def test_argon2_version_upgrade(self):
hasher = get_hasher("argon2")
state = {"upgraded": False}
encoded = (
"argon2$argon2id$v=19$m=102400,t=2,p=8$Y041dExhNkljRUUy$TMa6A8fPJh"
"CAUXRhJXCXdw"
)
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)
@skipUnless(scrypt, "scrypt not available")
@override_settings(PASSWORD_HASHERS=PASSWORD_HASHERS)
class TestUtilsHashPassScrypt(SimpleTestCase):
def test_scrypt(self):
encoded = make_password("lètmein", "seasalt", "scrypt")
self.assertEqual(
encoded,
"scrypt$16384$seasalt$8$1$Qj3+9PPyRjSJIebHnG81TMjsqtaIGxNQG/aEB/NY"
"afTJ7tibgfYz71m0ldQESkXFRkdVCBhhY8mx7rQwite/Pw==",
)
self.assertIs(is_password_usable(encoded), True)
self.assertIs(check_password("lètmein", encoded), True)
self.assertIs(check_password("lètmeinz", encoded), False)
self.assertEqual(identify_hasher(encoded).algorithm, "scrypt")
# Blank passwords.
blank_encoded = make_password("", "seasalt", "scrypt")
self.assertIs(blank_encoded.startswith("scrypt$"), True)
self.assertIs(is_password_usable(blank_encoded), True)
self.assertIs(check_password("", blank_encoded), True)
self.assertIs(check_password(" ", blank_encoded), False)
def test_scrypt_decode(self):
encoded = make_password("lètmein", "seasalt", "scrypt")
hasher = get_hasher("scrypt")
decoded = hasher.decode(encoded)
tests = [
("block_size", hasher.block_size),
("parallelism", hasher.parallelism),
("salt", "seasalt"),
("work_factor", hasher.work_factor),
]
for key, excepted in tests:
with self.subTest(key=key):
self.assertEqual(decoded[key], excepted)
def _test_scrypt_upgrade(self, attr, summary_key, new_value):
hasher = get_hasher("scrypt")
self.assertEqual(hasher.algorithm, "scrypt")
self.assertNotEqual(getattr(hasher, attr), new_value)
old_value = getattr(hasher, attr)
try:
# Generate hash with attr set to the new value.
setattr(hasher, attr, new_value)
encoded = make_password("lètmein", "seasalt", "scrypt")
attr_value = hasher.safe_summary(encoded)[summary_key]
self.assertEqual(attr_value, new_value)
state = {"upgraded": False}
def setter(password):
state["upgraded"] = True
# No update is triggered.
self.assertIs(check_password("lètmein", encoded, setter, "scrypt"), True)
self.assertIs(state["upgraded"], False)
# Revert to the old value.
setattr(hasher, attr, old_value)
# Password is updated.
self.assertIs(check_password("lètmein", encoded, setter, "scrypt"), True)
self.assertIs(state["upgraded"], True)
finally:
setattr(hasher, attr, old_value)
def test_scrypt_upgrade(self):
tests = [
("work_factor", "work factor", 2**11),
("block_size", "block size", 10),
("parallelism", "parallelism", 2),
]
for attr, summary_key, new_value in tests:
with self.subTest(attr=attr):
self._test_scrypt_upgrade(attr, summary_key, new_value)