def test_str(self):
with local(DefaultContext()) as default:
self.mult.multiply(59)
str(default)
str(default.actions)
with local(NullContext()) as null:
self.mult.multiply(59)
str(null)
def test_path(self):
with local(PathContext([0, 1])) as ctx:
key_generator = KeyGeneration(self.mult, self.secp128r1, True)
key_generator.generate()
self.assertIsInstance(ctx.value, ScalarMultiplicationAction)
with local(PathContext([0, 1, 7])) as ctx:
key_generator = KeyGeneration(self.mult, self.secp128r1, True)
key_generator.generate()
def test_precomp(self):
bnaf = BinaryNAFMultiplier(self.add, self.dbl, self.neg, self.scale)
with local(MultipleContext()) as ctx:
bnaf.init(self.secp128r1, self.base)
muls = list(ctx.points.values())
self.assertListEqual(muls, [1, -1])
wnaf = WindowNAFMultiplier(self.add, self.dbl, self.neg, 3, self.scale)
with local(MultipleContext()) as ctx:
wnaf.init(self.secp128r1, self.base)
muls = list(ctx.points.values())
self.assertListEqual(muls, [1, 2, 3, 5])
def test_window(self):
mult = WindowNAFMultiplier(
self.add, self.dbl, self.neg, 3, precompute_negation=True
)
with local(MultipleContext()):
mult.init(self.secp128r1, self.base)
mult.multiply(5)
def test_ladder(self):
curve25519 = get_params("other", "Curve25519", "xz")
base = curve25519.generator
coords = curve25519.curve.coordinate_model
ladd = coords.formulas["ladd-1987-m"]
dadd = coords.formulas["dadd-1987-m"]
dbl = coords.formulas["dbl-1987-m"]
scale = coords.formulas["scale"]
ladd_mult = LadderMultiplier(ladd, dbl, scale)
with local(MultipleContext()) as ctx:
ladd_mult.init(curve25519, base)
ladd_mult.multiply(1339278426732672313)
muls = list(ctx.points.values())
self.assertEqual(muls[-2], 1339278426732672313)
dadd_mult = DifferentialLadderMultiplier(dadd, dbl, scale)
with local(MultipleContext()) as ctx:
dadd_mult.init(curve25519, base)
dadd_mult.multiply(1339278426732672313)
muls = list(ctx.points.values())
self.assertEqual(muls[-2], 1339278426732672313)
def test_default(self):
token = setcontext(DefaultContext())
self.addCleanup(resetcontext, token)
with local(DefaultContext()) as ctx:
result = self.mult.multiply(59)
self.assertEqual(len(ctx.actions), 1)
action = next(iter(ctx.actions.keys()))
self.assertIsInstance(action, ScalarMultiplicationAction)
self.assertEqual(len(getcontext().actions), 0)
self.assertEqual(result, action.result)
def test_basic(self, name, scalar):
mult = LTRMultiplier(
self.add,
self.dbl,
self.scale,
always=False,
complete=False,
short_circuit=True,
)
with local(MultipleContext()) as ctx:
mult.init(self.secp128r1, self.base)
mult.multiply(scalar)
muls = list(ctx.points.values())
self.assertEqual(muls[-1], scalar)
def test_default_no_enter(self):
with local(DefaultContext()) as default:
with self.assertRaises(ValueError):
default.exit_action(RandomModAction(7))
def test_null(self):
with local() as ctx:
self.mult.multiply(59)
self.assertIsInstance(ctx, NullContext)
