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from typing import List, Type, Callable
from pyecsca.ec.formula import Formula, AdditionFormula, DifferentialAdditionFormula, DoublingFormula, LadderFormula, \
NegationFormula
from pyecsca.ec.formula.fake import FakeFormula
from pyecsca.ec.mult import ScalarMultiplier
from pyecsca.ec.params import DomainParameters
def fake_mult(mult_class: Type[ScalarMultiplier], mult_factory: Callable, params: DomainParameters) -> ScalarMultiplier:
"""
Get a multiplier with `FakeFormula`s.
:param mult_class: The class of the scalar multiplier to use.
:param mult_factory: A callable that takes the formulas and instantiates the multiplier.
:param params: The domain parameters to use.
:return: The multiplier.
"""
formula_classes: List[Type[Formula]] = list(
filter(
lambda klass: klass in mult_class.requires,
[
AdditionFormula,
DifferentialAdditionFormula,
DoublingFormula,
LadderFormula,
NegationFormula,
],
)
)
formulas = []
for formula in formula_classes:
for subclass in formula.__subclasses__():
if issubclass(subclass, FakeFormula):
formulas.append(subclass(params.curve.coordinate_model))
mult = mult_factory(*formulas, short_circuit=False)
return mult
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