From 49ea01816d5e4acaa8996da04072936206bbb58f Mon Sep 17 00:00:00 2001
From: J08nY
Date: Wed, 19 Mar 2025 15:57:04 +0100
Subject: Add Brumley & Tuveri countermeasure.

---
 test/ec/test_countermeasures.py | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'test/ec')

diff --git a/test/ec/test_countermeasures.py b/test/ec/test_countermeasures.py
index 8a572e8..3cd5461 100644
--- a/test/ec/test_countermeasures.py
+++ b/test/ec/test_countermeasures.py
@@ -7,7 +7,7 @@ from pyecsca.ec.countermeasures import (
     GroupScalarRandomization,
     AdditiveSplitting,
     MultiplicativeSplitting,
-    EuclideanSplitting,
+    EuclideanSplitting, BrumleyTuveri,
 )
 from pyecsca.ec.mult import *
 
@@ -219,3 +219,22 @@ def test_euclidean_splitting(mults, secp128r1, num):
         esplit.init(secp128r1, secp128r1.generator)
         masked = esplit.multiply(num)
         assert raw.equals(masked)
+
+
+@pytest.mark.parametrize(
+    "num",
+    [
+        3253857902090173296443513219124437746,
+        1234567893141592653589793238464338327,
+    ],
+)
+def test_brumley_tuveri(mults, secp128r1, num):
+    mult = copy(mults[0])
+    mult.init(secp128r1, secp128r1.generator)
+    raw = mult.multiply(num)
+
+    for mult in mults:
+        bt = BrumleyTuveri(mult)
+        bt.init(secp128r1, secp128r1.generator)
+        masked = bt.multiply(num)
+        assert raw.equals(masked)
-- 
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