Add conversion to and from affine points.

1 files changed, 25 insertions, 0 deletions

diff --git a/test/ec/test_coordinates.py b/test/ec/test_coordinates.py
new file mode 100644
index 0000000..7532308
--- /dev/null
+++ b/test/ec/test_coordinates.py
@@ -0,0 +1,25 @@
+from unittest import TestCase
+
+from pyecsca.ec.curve import EllipticCurve
+from pyecsca.ec.mod import Mod
+from pyecsca.ec.model import ShortWeierstrassModel
+from pyecsca.ec.point import Point
+
+
+class CoordinateTests(TestCase):
+
+    def setUp(self):
+        self.p = 0xfffffffdffffffffffffffffffffffff
+        self.coords = ShortWeierstrassModel().coordinates["projective"]
+        self.secp128r1 = EllipticCurve(ShortWeierstrassModel(), self.coords,
+                                       dict(a=0xfffffffdfffffffffffffffffffffffc,
+                                            b=0xe87579c11079f43dd824993c2cee5ed3),
+                                       Point(self.coords, X=Mod(0, self.p), Y=Mod(1, self.p),
+                                             Z=Mod(0, self.p)))
+
+    def test_affine(self):
+        pt = Point(self.coords, X=Mod(0x161ff7528b899b2d0c28607ca52c5b86, self.p),
+                   Y=Mod(0xcf5ac8395bafeb13c02da292dded7a83, self.p),
+                   Z=Mod(1, self.p))
+        affine_Point = pt.to_affine()
+        assert pt.equals(affine_Point)