1 files changed, 89 insertions, 0 deletions
diff --git a/qvisqve_secrets/secrets_tests.py b/qvisqve_secrets/secrets_tests.py
new file mode 100644
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+++ b/qvisqve_secrets/secrets_tests.py
@@ -0,0 +1,89 @@
+# 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)