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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, InfinityPoint
class CoordinateTests(TestCase):
def setUp(self):
self.p = 0xfffffffdffffffffffffffffffffffff
self.coords = ShortWeierstrassModel().coordinates["projective"]
self.secp128r1 = EllipticCurve(ShortWeierstrassModel(), self.coords, self.p,
dict(a=0xfffffffdfffffffffffffffffffffffc,
b=0xe87579c11079f43dd824993c2cee5ed3),
InfinityPoint(self.coords))
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)
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