From d40de259097c5e8d8fd35539560ca7c3d47523e7 Mon Sep 17 00:00:00 2001
From: Ryan Rueger <git@rueg.re>
Date: Sat, 1 Mar 2025 20:25:41 +0100
Subject: Initial Commit
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Co-Authored-By: Damien Robert <Damien.Olivier.Robert+git@gmail.com>
Co-Authored-By: Frederik Vercauteren <frederik.vercauteren@gmail.com>
Co-Authored-By: Jonathan Komada Eriksen <jonathan.eriksen97@gmail.com>
Co-Authored-By: Pierrick Dartois <pierrickdartois@icloud.com>
Co-Authored-By: Riccardo Invernizzi <nidadoni@gmail.com>
Co-Authored-By: Ryan Rueger <git@rueg.re>                                                                                                                                           [0.01s]
Co-Authored-By: Benjamin Wesolowski <benjamin@pasch.umpa.ens-lyon.fr>
Co-Authored-By: Arthur Herlédan Le Merdy <ahlm@riseup.net>
Co-Authored-By: Boris Fouotsa <tako.fouotsa@epfl.ch>
---
 test_key_exchange.py | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 test_key_exchange.py

(limited to 'test_key_exchange.py')

diff --git a/test_key_exchange.py b/test_key_exchange.py
new file mode 100644
index 0000000..220a3c2
--- /dev/null
+++ b/test_key_exchange.py
@@ -0,0 +1,83 @@
+#!/usr/bin/env python3
+from argparse import ArgumentParser, RawTextHelpFormatter
+from datetime import datetime, timedelta
+
+from pegasis import PEGASIS
+
+description = """
+Testing the key exchange from the pegasis action.
+
+The test does the following
+
+  1) Randomly samples ideals a, b
+  2) Computes Ea, Eb as the action of a and b on the starting curve E
+  3) Computes Eab, Eba as the action of b on Ea and a on Eb
+  4) Verifies that Eab == Eba
+"""
+
+
+def action(EGA, E, ideal):
+    global stats
+    start = datetime.now()
+    E_ideal = EGA.action(E, ideal)
+    end = datetime.now()
+    stats["time"] += (end - start) / timedelta(microseconds=1) / 10**6
+    stats["actions"] += 1
+    return E_ideal
+
+
+if __name__ == "__main__":
+    print("Beginning tests...")
+    parser = ArgumentParser(prog="test_key_exchange.py", description=description, formatter_class=RawTextHelpFormatter)
+    parser.add_argument(
+        "--loglevel",
+        default="INFO",
+        help="Set loglevel to one of 'DEBUG', 'INFO' (default), 'WARNING', 'ERROR', 'CRITICAL'",
+        choices=("DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"),
+    )
+    parser.add_argument("-p", type=int, help="Prime size", choices=(500, 1000, 1500, 2000, 4000), default=500)
+    args = parser.parse_args()
+
+    stats = {
+        # Tries
+        "tries": 0,
+        # Successes
+        "success": 0,
+        # Number of action computations done so far
+        "actions": 0,
+        # Total action time (seconds)
+        "time": 0.0,
+    }
+
+    while True:
+        stats["tries"] += 1
+
+        # Get two instances of PEGASIS to prove that there is no stateful
+        # information in the class that could interfere
+        alice = PEGASIS(args.p)
+        bob = PEGASIS(args.p)
+
+        assert alice.E_start == bob.E_start
+
+        alice_seckey = alice.sample_ideal()
+        bob_seckey = bob.sample_ideal()
+
+        alice_pubkey = action(alice, alice.E_start, alice_seckey)
+        bob_pubkey = action(bob, bob.E_start, bob_seckey)
+
+        alice_shared_secret = action(alice, bob_pubkey, alice_seckey)
+        bob_shared_secret = action(bob, alice_pubkey, bob_seckey)
+
+        if alice_shared_secret != bob_shared_secret:
+            status = "Failure"
+        else:
+            status = "Success!"
+            stats["success"] += 1
+
+        _log = []
+        _log += [f"#{stats['tries']:>3} {status}"]
+        _log += [f"Success rate: {stats['success'] / stats['tries'] * 100:>4.1f}%"]
+        _log += [f"Actions computed: {stats['actions']:>4}"]
+        _log += [f"Time per action: {stats["time"] / stats["actions"]:4>.2f}s"]
+
+        print(" | ".join(_log))
-- 
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