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# Copyright (C) 2018 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import unittest
import qvisqve_secrets
class SecretHasherTests(unittest.TestCase):
def test_byte_string_survives_hex_roundtrip(self):
byte_string = b'\x00\x02\x03'
sh = qvisqve_secrets.SecretHasher()
encoded = sh.hex_encode(byte_string)
self.assertEqual(byte_string, sh.hex_decode(encoded))
def test_returns_sufficiently_long_salt(self):
sh = qvisqve_secrets.SecretHasher()
salt = sh.get_salt()
self.assertTrue(len(salt) >= 8)
def test_produces_a_hash(self):
cleartext = 'hunter2'
salt = b'nacl'
sh = qvisqve_secrets.SecretHasher()
hashed = sh.hash(cleartext, salt)
self.assertTrue(isinstance(hashed, dict))
def test_produces_a_hash_with_salt(self):
cleartext = 'hunter2'
sh = qvisqve_secrets.SecretHasher()
hashed = sh.hash(cleartext)
self.assertTrue(isinstance(hashed, dict))
def test_produces_same_hash_for_same_input(self):
cleartext = 'hunter2'
salt = b'nacl'
sh = qvisqve_secrets.SecretHasher()
hashed1 = sh.hash(cleartext, salt)
hashed2 = sh.hash(cleartext, salt)
self.assertEqual(hashed1, hashed2)
def test_produces_different_hashes_for_different_cleartext(self):
sh = qvisqve_secrets.SecretHasher()
salt = b'nacl'
hashed1 = sh.hash('hunter2', salt)
hashed2 = sh.hash('swordfish', salt)
self.assertNotEqual(hashed1, hashed2)
def test_produces_different_hashes_for_same_cleartext(self):
sh = qvisqve_secrets.SecretHasher()
hashed1 = sh.hash('hunter2', b'nacl')
hashed2 = sh.hash('hunter2', b'nh4cl')
self.assertNotEqual(hashed1, hashed2)
def test_accepts_correct_password(self):
cleartext = 'hunter2'
sh = qvisqve_secrets.SecretHasher()
hashed = sh.hash(cleartext, b'nacl')
self.assertTrue(sh.is_correct(hashed, cleartext))
def test_rejects_incorrect_password(self):
cleartext = 'swordfish'
sh = qvisqve_secrets.SecretHasher()
hashed = sh.hash(cleartext, b'nacl')
self.assertTrue(sh.is_correct(hashed, cleartext))
def test_handles_parameter_changes(self):
cleartext = 'hunter2'
salt = b'nacl'
sh = qvisqve_secrets.SecretHasher()
hashed = sh.hash(cleartext, salt)
sh.set_n(2**1)
self.assertTrue(sh.is_correct(hashed, cleartext))
self.assertNotEqual(sh.hash(cleartext, salt), hashed)
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