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from functools import partial
from pyecsca.ec.mult import LTRMultiplier, CombMultiplier
from pyecsca.sca.re.epa import errors_out
def test_errors_out(secp128r1):
res_empty_checks = errors_out(
scalar=15,
params=secp128r1,
mult_class=LTRMultiplier,
mult_factory=LTRMultiplier,
check_funcs={},
check_condition="all",
precomp_to_affine=True,
)
assert not res_empty_checks
def add_check(k, l): # noqa
return k == 6
res_check_k_add = errors_out(
scalar=15,
params=secp128r1,
mult_class=LTRMultiplier,
mult_factory=LTRMultiplier,
check_funcs={"add": add_check},
check_condition="all",
precomp_to_affine=True,
)
assert res_check_k_add
def affine_check(k):
return k == 15
res_check_k_affine = errors_out(
scalar=15,
params=secp128r1,
mult_class=LTRMultiplier,
mult_factory=LTRMultiplier,
check_funcs={"affine": affine_check},
check_condition="all",
precomp_to_affine=True,
)
assert res_check_k_affine
def affine_check_comb(k):
return k == 2**64
res_check_k_affine_precomp = errors_out(
scalar=15,
params=secp128r1,
mult_class=CombMultiplier,
mult_factory=partial(CombMultiplier, width=2),
check_funcs={"affine": affine_check_comb},
check_condition="all",
precomp_to_affine=True,
)
assert res_check_k_affine_precomp
res_check_k_no_affine_precomp = errors_out(
scalar=15,
params=secp128r1,
mult_class=CombMultiplier,
mult_factory=partial(CombMultiplier, width=2),
check_funcs={"affine": affine_check_comb},
check_condition="all",
precomp_to_affine=False,
)
assert not res_check_k_no_affine_precomp
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