527 lines
22 KiB
Python
527 lines
22 KiB
Python
from unittest import mock, skipUnless
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from django.conf.global_settings import PASSWORD_HASHERS
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from django.contrib.auth.hashers import (
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UNUSABLE_PASSWORD_PREFIX, UNUSABLE_PASSWORD_SUFFIX_LENGTH,
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BasePasswordHasher, PBKDF2PasswordHasher, PBKDF2SHA1PasswordHasher,
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check_password, get_hasher, identify_hasher, is_password_usable,
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make_password,
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)
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from django.test import SimpleTestCase
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from django.test.utils import override_settings
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from django.utils.encoding import force_bytes
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try:
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import crypt
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except ImportError:
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crypt = None
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else:
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# On some platforms (e.g. OpenBSD), crypt.crypt() always return None.
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if crypt.crypt('', '') is None:
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crypt = None
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try:
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import bcrypt
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except ImportError:
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bcrypt = None
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try:
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import argon2
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except ImportError:
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argon2 = None
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class PBKDF2SingleIterationHasher(PBKDF2PasswordHasher):
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iterations = 1
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@override_settings(PASSWORD_HASHERS=PASSWORD_HASHERS)
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class TestUtilsHashPass(SimpleTestCase):
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def test_simple(self):
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encoded = make_password('lètmein')
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self.assertTrue(encoded.startswith('pbkdf2_sha256$'))
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self.assertTrue(is_password_usable(encoded))
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self.assertTrue(check_password('lètmein', encoded))
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self.assertFalse(check_password('lètmeinz', encoded))
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# Blank passwords
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blank_encoded = make_password('')
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self.assertTrue(blank_encoded.startswith('pbkdf2_sha256$'))
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self.assertTrue(is_password_usable(blank_encoded))
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self.assertTrue(check_password('', blank_encoded))
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self.assertFalse(check_password(' ', blank_encoded))
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def test_pbkdf2(self):
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encoded = make_password('lètmein', 'seasalt', 'pbkdf2_sha256')
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self.assertEqual(encoded, 'pbkdf2_sha256$100000$seasalt$BNZ6eyaNc8qFTJPjrAq99hSYb73EgAdytAtdBg2Sdcc=')
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self.assertTrue(is_password_usable(encoded))
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self.assertTrue(check_password('lètmein', encoded))
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self.assertFalse(check_password('lètmeinz', encoded))
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self.assertEqual(identify_hasher(encoded).algorithm, "pbkdf2_sha256")
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# Blank passwords
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blank_encoded = make_password('', 'seasalt', 'pbkdf2_sha256')
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self.assertTrue(blank_encoded.startswith('pbkdf2_sha256$'))
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self.assertTrue(is_password_usable(blank_encoded))
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self.assertTrue(check_password('', blank_encoded))
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self.assertFalse(check_password(' ', blank_encoded))
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@override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.SHA1PasswordHasher'])
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def test_sha1(self):
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encoded = make_password('lètmein', 'seasalt', 'sha1')
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self.assertEqual(encoded, 'sha1$seasalt$cff36ea83f5706ce9aa7454e63e431fc726b2dc8')
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self.assertTrue(is_password_usable(encoded))
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self.assertTrue(check_password('lètmein', encoded))
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self.assertFalse(check_password('lètmeinz', encoded))
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self.assertEqual(identify_hasher(encoded).algorithm, "sha1")
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# Blank passwords
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blank_encoded = make_password('', 'seasalt', 'sha1')
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self.assertTrue(blank_encoded.startswith('sha1$'))
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self.assertTrue(is_password_usable(blank_encoded))
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self.assertTrue(check_password('', blank_encoded))
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self.assertFalse(check_password(' ', blank_encoded))
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@override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.MD5PasswordHasher'])
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def test_md5(self):
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encoded = make_password('lètmein', 'seasalt', 'md5')
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self.assertEqual(encoded, 'md5$seasalt$3f86d0d3d465b7b458c231bf3555c0e3')
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self.assertTrue(is_password_usable(encoded))
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self.assertTrue(check_password('lètmein', encoded))
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self.assertFalse(check_password('lètmeinz', encoded))
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self.assertEqual(identify_hasher(encoded).algorithm, "md5")
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# Blank passwords
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blank_encoded = make_password('', 'seasalt', 'md5')
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self.assertTrue(blank_encoded.startswith('md5$'))
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self.assertTrue(is_password_usable(blank_encoded))
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self.assertTrue(check_password('', blank_encoded))
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self.assertFalse(check_password(' ', blank_encoded))
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@override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.UnsaltedMD5PasswordHasher'])
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def test_unsalted_md5(self):
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encoded = make_password('lètmein', '', 'unsalted_md5')
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self.assertEqual(encoded, '88a434c88cca4e900f7874cd98123f43')
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self.assertTrue(is_password_usable(encoded))
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self.assertTrue(check_password('lètmein', encoded))
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self.assertFalse(check_password('lètmeinz', encoded))
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self.assertEqual(identify_hasher(encoded).algorithm, "unsalted_md5")
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# Alternate unsalted syntax
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alt_encoded = "md5$$%s" % encoded
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self.assertTrue(is_password_usable(alt_encoded))
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self.assertTrue(check_password('lètmein', alt_encoded))
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self.assertFalse(check_password('lètmeinz', alt_encoded))
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# Blank passwords
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blank_encoded = make_password('', '', 'unsalted_md5')
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self.assertTrue(is_password_usable(blank_encoded))
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self.assertTrue(check_password('', blank_encoded))
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self.assertFalse(check_password(' ', blank_encoded))
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@override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.UnsaltedSHA1PasswordHasher'])
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def test_unsalted_sha1(self):
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encoded = make_password('lètmein', '', 'unsalted_sha1')
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self.assertEqual(encoded, 'sha1$$6d138ca3ae545631b3abd71a4f076ce759c5700b')
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self.assertTrue(is_password_usable(encoded))
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self.assertTrue(check_password('lètmein', encoded))
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self.assertFalse(check_password('lètmeinz', encoded))
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self.assertEqual(identify_hasher(encoded).algorithm, "unsalted_sha1")
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# Raw SHA1 isn't acceptable
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alt_encoded = encoded[6:]
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self.assertFalse(check_password('lètmein', alt_encoded))
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# Blank passwords
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blank_encoded = make_password('', '', 'unsalted_sha1')
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self.assertTrue(blank_encoded.startswith('sha1$'))
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self.assertTrue(is_password_usable(blank_encoded))
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self.assertTrue(check_password('', blank_encoded))
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self.assertFalse(check_password(' ', blank_encoded))
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@skipUnless(crypt, "no crypt module to generate password.")
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@override_settings(PASSWORD_HASHERS=['django.contrib.auth.hashers.CryptPasswordHasher'])
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def test_crypt(self):
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encoded = make_password('lètmei', 'ab', 'crypt')
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self.assertEqual(encoded, 'crypt$$ab1Hv2Lg7ltQo')
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self.assertTrue(is_password_usable(encoded))
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self.assertTrue(check_password('lètmei', encoded))
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self.assertFalse(check_password('lètmeiz', encoded))
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self.assertEqual(identify_hasher(encoded).algorithm, "crypt")
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# Blank passwords
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blank_encoded = make_password('', 'ab', 'crypt')
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self.assertTrue(blank_encoded.startswith('crypt$'))
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self.assertTrue(is_password_usable(blank_encoded))
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self.assertTrue(check_password('', blank_encoded))
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self.assertFalse(check_password(' ', blank_encoded))
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@skipUnless(bcrypt, "bcrypt not installed")
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def test_bcrypt_sha256(self):
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encoded = make_password('lètmein', hasher='bcrypt_sha256')
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self.assertTrue(is_password_usable(encoded))
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self.assertTrue(encoded.startswith('bcrypt_sha256$'))
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self.assertTrue(check_password('lètmein', encoded))
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self.assertFalse(check_password('lètmeinz', encoded))
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self.assertEqual(identify_hasher(encoded).algorithm, "bcrypt_sha256")
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# password truncation no longer works
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password = (
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'VSK0UYV6FFQVZ0KG88DYN9WADAADZO1CTSIVDJUNZSUML6IBX7LN7ZS3R5'
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'JGB3RGZ7VI7G7DJQ9NI8BQFSRPTG6UWTTVESA5ZPUN'
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)
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encoded = make_password(password, hasher='bcrypt_sha256')
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self.assertTrue(check_password(password, encoded))
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self.assertFalse(check_password(password[:72], encoded))
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# Blank passwords
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blank_encoded = make_password('', hasher='bcrypt_sha256')
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self.assertTrue(blank_encoded.startswith('bcrypt_sha256$'))
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self.assertTrue(is_password_usable(blank_encoded))
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self.assertTrue(check_password('', blank_encoded))
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self.assertFalse(check_password(' ', blank_encoded))
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@skipUnless(bcrypt, "bcrypt not installed")
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def test_bcrypt(self):
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encoded = make_password('lètmein', hasher='bcrypt')
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self.assertTrue(is_password_usable(encoded))
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self.assertTrue(encoded.startswith('bcrypt$'))
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self.assertTrue(check_password('lètmein', encoded))
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self.assertFalse(check_password('lètmeinz', encoded))
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self.assertEqual(identify_hasher(encoded).algorithm, "bcrypt")
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# Blank passwords
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blank_encoded = make_password('', hasher='bcrypt')
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self.assertTrue(blank_encoded.startswith('bcrypt$'))
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self.assertTrue(is_password_usable(blank_encoded))
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self.assertTrue(check_password('', blank_encoded))
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self.assertFalse(check_password(' ', blank_encoded))
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@skipUnless(bcrypt, "bcrypt not installed")
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def test_bcrypt_upgrade(self):
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hasher = get_hasher('bcrypt')
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self.assertEqual('bcrypt', hasher.algorithm)
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self.assertNotEqual(hasher.rounds, 4)
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old_rounds = hasher.rounds
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try:
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# Generate a password with 4 rounds.
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hasher.rounds = 4
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encoded = make_password('letmein', hasher='bcrypt')
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rounds = hasher.safe_summary(encoded)['work factor']
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self.assertEqual(rounds, '04')
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state = {'upgraded': False}
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def setter(password):
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state['upgraded'] = True
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# No upgrade is triggered.
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self.assertTrue(check_password('letmein', encoded, setter, 'bcrypt'))
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self.assertFalse(state['upgraded'])
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# Revert to the old rounds count and ...
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hasher.rounds = old_rounds
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# ... check if the password would get updated to the new count.
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self.assertTrue(check_password('letmein', encoded, setter, 'bcrypt'))
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self.assertTrue(state['upgraded'])
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finally:
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hasher.rounds = old_rounds
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@skipUnless(bcrypt, "bcrypt not installed")
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def test_bcrypt_harden_runtime(self):
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hasher = get_hasher('bcrypt')
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self.assertEqual('bcrypt', hasher.algorithm)
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with mock.patch.object(hasher, 'rounds', 4):
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encoded = make_password('letmein', hasher='bcrypt')
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with mock.patch.object(hasher, 'rounds', 6), \
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mock.patch.object(hasher, 'encode', side_effect=hasher.encode):
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hasher.harden_runtime('wrong_password', encoded)
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# Increasing rounds from 4 to 6 means an increase of 4 in workload,
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# therefore hardening should run 3 times to make the timing the
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# same (the original encode() call already ran once).
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self.assertEqual(hasher.encode.call_count, 3)
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# Get the original salt (includes the original workload factor)
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algorithm, data = encoded.split('$', 1)
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expected_call = (('wrong_password', force_bytes(data[:29])),)
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self.assertEqual(hasher.encode.call_args_list, [expected_call] * 3)
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def test_unusable(self):
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encoded = make_password(None)
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self.assertEqual(len(encoded), len(UNUSABLE_PASSWORD_PREFIX) + UNUSABLE_PASSWORD_SUFFIX_LENGTH)
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self.assertFalse(is_password_usable(encoded))
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self.assertFalse(check_password(None, encoded))
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self.assertFalse(check_password(encoded, encoded))
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self.assertFalse(check_password(UNUSABLE_PASSWORD_PREFIX, encoded))
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self.assertFalse(check_password('', encoded))
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self.assertFalse(check_password('lètmein', encoded))
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self.assertFalse(check_password('lètmeinz', encoded))
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with self.assertRaisesMessage(ValueError, 'Unknown password hashing algorith'):
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identify_hasher(encoded)
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# Assert that the unusable passwords actually contain a random part.
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# This might fail one day due to a hash collision.
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self.assertNotEqual(encoded, make_password(None), "Random password collision?")
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def test_unspecified_password(self):
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"""
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Makes sure specifying no plain password with a valid encoded password
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returns `False`.
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"""
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self.assertFalse(check_password(None, make_password('lètmein')))
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def test_bad_algorithm(self):
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msg = (
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"Unknown password hashing algorithm '%s'. Did you specify it in "
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"the PASSWORD_HASHERS setting?"
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)
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with self.assertRaisesMessage(ValueError, msg % 'lolcat'):
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make_password('lètmein', hasher='lolcat')
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with self.assertRaisesMessage(ValueError, msg % 'lolcat'):
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identify_hasher('lolcat$salt$hash')
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def test_bad_encoded(self):
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self.assertFalse(is_password_usable('lètmein_badencoded'))
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self.assertFalse(is_password_usable(''))
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def test_low_level_pbkdf2(self):
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hasher = PBKDF2PasswordHasher()
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encoded = hasher.encode('lètmein', 'seasalt2')
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self.assertEqual(encoded, 'pbkdf2_sha256$100000$seasalt2$Tl4GMr+Yt1zzO1sbKoUaDBdds5NkR3RxaDWuQsliFrI=')
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self.assertTrue(hasher.verify('lètmein', encoded))
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def test_low_level_pbkdf2_sha1(self):
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hasher = PBKDF2SHA1PasswordHasher()
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encoded = hasher.encode('lètmein', 'seasalt2')
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self.assertEqual(encoded, 'pbkdf2_sha1$100000$seasalt2$dK/dL+ySBZ5zoR0+Zk3SB/VsH0U=')
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self.assertTrue(hasher.verify('lètmein', encoded))
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@override_settings(
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PASSWORD_HASHERS=[
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'django.contrib.auth.hashers.PBKDF2PasswordHasher',
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'django.contrib.auth.hashers.SHA1PasswordHasher',
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'django.contrib.auth.hashers.MD5PasswordHasher',
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],
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)
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def test_upgrade(self):
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self.assertEqual('pbkdf2_sha256', get_hasher('default').algorithm)
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for algo in ('sha1', 'md5'):
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encoded = make_password('lètmein', hasher=algo)
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state = {'upgraded': False}
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def setter(password):
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state['upgraded'] = True
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self.assertTrue(check_password('lètmein', encoded, setter))
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self.assertTrue(state['upgraded'])
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def test_no_upgrade(self):
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encoded = make_password('lètmein')
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state = {'upgraded': False}
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def setter():
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state['upgraded'] = True
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self.assertFalse(check_password('WRONG', encoded, setter))
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self.assertFalse(state['upgraded'])
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@override_settings(
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PASSWORD_HASHERS=[
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'django.contrib.auth.hashers.PBKDF2PasswordHasher',
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'django.contrib.auth.hashers.SHA1PasswordHasher',
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'django.contrib.auth.hashers.MD5PasswordHasher',
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],
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)
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def test_no_upgrade_on_incorrect_pass(self):
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self.assertEqual('pbkdf2_sha256', get_hasher('default').algorithm)
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for algo in ('sha1', 'md5'):
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encoded = make_password('lètmein', hasher=algo)
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state = {'upgraded': False}
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def setter():
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state['upgraded'] = True
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self.assertFalse(check_password('WRONG', encoded, setter))
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self.assertFalse(state['upgraded'])
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def test_pbkdf2_upgrade(self):
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hasher = get_hasher('default')
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self.assertEqual('pbkdf2_sha256', hasher.algorithm)
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self.assertNotEqual(hasher.iterations, 1)
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old_iterations = hasher.iterations
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try:
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# Generate a password with 1 iteration.
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hasher.iterations = 1
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encoded = make_password('letmein')
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algo, iterations, salt, hash = encoded.split('$', 3)
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self.assertEqual(iterations, '1')
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state = {'upgraded': False}
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def setter(password):
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state['upgraded'] = True
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# No upgrade is triggered
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self.assertTrue(check_password('letmein', encoded, setter))
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self.assertFalse(state['upgraded'])
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# Revert to the old iteration count and ...
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hasher.iterations = old_iterations
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# ... check if the password would get updated to the new iteration count.
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self.assertTrue(check_password('letmein', encoded, setter))
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self.assertTrue(state['upgraded'])
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finally:
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hasher.iterations = old_iterations
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def test_pbkdf2_harden_runtime(self):
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hasher = get_hasher('default')
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self.assertEqual('pbkdf2_sha256', hasher.algorithm)
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with mock.patch.object(hasher, 'iterations', 1):
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encoded = make_password('letmein')
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with mock.patch.object(hasher, 'iterations', 6), \
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mock.patch.object(hasher, 'encode', side_effect=hasher.encode):
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hasher.harden_runtime('wrong_password', encoded)
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# Encode should get called once ...
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self.assertEqual(hasher.encode.call_count, 1)
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# ... with the original salt and 5 iterations.
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algorithm, iterations, salt, hash = encoded.split('$', 3)
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expected_call = (('wrong_password', salt, 5),)
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self.assertEqual(hasher.encode.call_args, expected_call)
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def test_pbkdf2_upgrade_new_hasher(self):
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hasher = get_hasher('default')
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self.assertEqual('pbkdf2_sha256', hasher.algorithm)
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self.assertNotEqual(hasher.iterations, 1)
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state = {'upgraded': False}
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def setter(password):
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state['upgraded'] = True
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with self.settings(PASSWORD_HASHERS=[
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'auth_tests.test_hashers.PBKDF2SingleIterationHasher']):
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encoded = make_password('letmein')
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algo, iterations, salt, hash = encoded.split('$', 3)
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self.assertEqual(iterations, '1')
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# No upgrade is triggered
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self.assertTrue(check_password('letmein', encoded, setter))
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self.assertFalse(state['upgraded'])
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# Revert to the old iteration count and check if the password would get
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# updated to the new iteration count.
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with self.settings(PASSWORD_HASHERS=[
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'django.contrib.auth.hashers.PBKDF2PasswordHasher',
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'auth_tests.test_hashers.PBKDF2SingleIterationHasher']):
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self.assertTrue(check_password('letmein', encoded, setter))
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self.assertTrue(state['upgraded'])
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def test_check_password_calls_harden_runtime(self):
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hasher = get_hasher('default')
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encoded = make_password('letmein')
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with mock.patch.object(hasher, 'harden_runtime'), \
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mock.patch.object(hasher, 'must_update', return_value=True):
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# Correct password supplied, no hardening needed
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check_password('letmein', encoded)
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self.assertEqual(hasher.harden_runtime.call_count, 0)
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|
# 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):
|
|
msg = "Hasher 'BasePasswordHasher' doesn't specify a library attribute"
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
BasePasswordHasher()._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()
|
|
|
|
|
|
@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)
|