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from unittest import TestCase
from parameterized import parameterized
from pyecsca.misc.cfg import TemporaryConfig
from pyecsca.ec.coordinates import AffineCoordinateModel
from pyecsca.ec.error import UnsatisfiedAssumptionError
from pyecsca.ec.params import get_params, load_params, load_category, get_category
class DomainParameterTests(TestCase):
def setUp(self):
self.secp128r1 = get_params("secg", "secp128r1", "projective")
self.curve25519 = get_params("other", "Curve25519", "xz")
def test_eq(self):
self.assertEqual(self.secp128r1, self.secp128r1)
self.assertNotEqual(self.secp128r1, self.curve25519)
self.assertNotEqual(self.secp128r1, None)
def test_str(self):
self.assertEqual(str(self.secp128r1), "DomainParameters(secg/secp128r1)")
@parameterized.expand([
("secg/secp128r1", "projective"),
("secg/secp256r1", "projective"),
("secg/secp521r1", "projective"),
("other/Curve25519", "xz"),
("other/Ed25519", "projective"),
("other/Ed448", "projective"),
("other/E-222", "projective")
])
def test_get_params(self, name, coords):
params = get_params(*name.split("/"), coords)
try:
assert params.curve.is_on_curve(params.generator)
except NotImplementedError:
pass
@parameterized.expand([
("anssi", "projective"),
("brainpool", lambda name: "projective" if name.endswith("r1") else "jacobian")
])
def test_get_category(self, name, coords):
get_category(name, coords)
def test_load_params(self):
params = load_params("test/data/curve.json", "projective")
try:
assert params.curve.is_on_curve(params.generator)
except NotImplementedError:
pass
def test_load_category(self):
category = load_category("test/data/curves.json", "yz")
self.assertEqual(len(category), 1)
@parameterized.expand([
("no_category/some", "else"),
("secg/no_curve", "else"),
("secg/secp128r1", "some")
])
def test_unknown(self, name, coords):
with self.assertRaises(ValueError):
get_params(*name.split("/"), coords)
def test_assumption(self):
with self.assertRaises(UnsatisfiedAssumptionError):
get_params("secg", "secp128r1", "projective-1")
with TemporaryConfig() as cfg:
cfg.ec.unsatisfied_coordinate_assumption_action = "ignore"
params = get_params("secg", "secp128r1", "projective-1")
self.assertIsNotNone(params)
self.assertIsNotNone(get_params("secg", "secp128r1", "projective-3"))
def test_infty(self):
with self.assertRaises(ValueError):
get_params("other", "Ed25519", "modified", False)
self.assertIsNotNone(get_params("secg", "secp128r1", "projective", False))
def test_no_binary(self):
with self.assertRaises(ValueError):
get_params("secg", "sect163r1", "something")
def test_no_extension(self):
with self.assertRaises(ValueError):
get_params("other", "Fp254n2BNa", "something")
def test_affine(self):
aff = get_params("secg", "secp128r1", "affine")
self.assertIsInstance(aff.curve.coordinate_model, AffineCoordinateModel)
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