Test for secret derivation

kitty_tests/crypto.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+# License: GPLv3 Copyright: 2022, Kovid Goyal <kovid at kovidgoyal.net>
+
+
+from . import BaseTest
+
+
+class TestCrypto(BaseTest):
+
+    def test_elliptic_curve_data_exchange(self):
+        from kitty.fast_data_types import EllipticCurveKey
+        alice = EllipticCurveKey()
+        bob = EllipticCurveKey()
+        alice_secret = alice.derive_secret(bob.public)
+        bob_secret = bob.derive_secret(alice.public)
+        self.assertEqual(len(alice_secret), 32)
+        self.assertEqual(len(bob_secret), 32)
+        self.assertEqual(alice_secret, bob_secret)