diff options
Diffstat (limited to 'pyecsca/sca/re/epa.py')
| -rw-r--r-- | pyecsca/sca/re/epa.py | 28 |
1 files changed, 6 insertions, 22 deletions
diff --git a/pyecsca/sca/re/epa.py b/pyecsca/sca/re/epa.py index 1f276d9..32abb45 100644 --- a/pyecsca/sca/re/epa.py +++ b/pyecsca/sca/re/epa.py @@ -2,34 +2,26 @@ Provides functionality inspired by the Exceptional Procedure Attack [EPA]_. """ -from typing import Callable, Literal, Type, Union +from typing import Callable, Literal, Union from public import public -from pyecsca.ec.context import local -from pyecsca.ec.formula.fake import FakePoint -from pyecsca.ec.mult import ScalarMultiplier -from pyecsca.ec.mult.fake import cached_fake_mult -from pyecsca.ec.params import DomainParameters +from pyecsca.ec.point import Point from pyecsca.sca.re.rpa import MultipleContext @public def errors_out( - scalar: int, - params: DomainParameters, - mult_class: Type[ScalarMultiplier], - mult_factory: Callable, + ctx: MultipleContext, + out: Point, check_funcs: dict[str, Callable], check_condition: Union[Literal["all"], Literal["necessary"]], precomp_to_affine: bool, ) -> bool: """ - :param scalar: - :param params: - :param mult_class: - :param mult_factory: + :param ctx: The context containing the points and formulas. + :param out: The output point to check. :param check_funcs: :param check_condition: :param precomp_to_affine: @@ -38,14 +30,6 @@ def errors_out( .. note:: The scalar multiplier must not short-circuit. """ - mult = cached_fake_mult(mult_class, mult_factory, params) - ctx = MultipleContext(keep_base=True) - with local(ctx, copy=False): - mult.init(params, FakePoint(params.curve.coordinate_model)) - - with local(ctx, copy=False): - out = mult.multiply(scalar) - affine_points = {out, *ctx.precomp.values()} if precomp_to_affine else {out} if check_condition == "all": points = set(ctx.points.keys()) |