def from_affine(cls, coords, curve: ec.EllipticCurve = None):
"""
Returns a Point object from the given affine coordinates in a tuple in
the format of (x, y) and a given curve.
"""
curve = curve if curve is not None else default_curve()
try:
curve_nid = backend._elliptic_curve_to_nid(curve)
except AttributeError:
# Presume that the user passed in the curve_nid
curve_nid = curve
affine_x, affine_y = coords
if type(affine_x) == int:
affine_x = openssl._int_to_bn(affine_x)
if type(affine_y) == int:
affine_y = openssl._int_to_bn(affine_y)
group = openssl._get_ec_group_by_curve_nid(curve_nid)
ec_point = openssl._get_EC_POINT_via_affine(affine_x,
affine_y,
ec_group=group)
return cls(ec_point, curve_nid, group)
def from_affine(cls,
coords: Tuple[int, int],
curve: Optional[Curve] = None) -> 'Point':
"""
Returns a Point object from the given affine coordinates in a tuple in
the format of (x, y) and a given curve.
"""
curve = curve if curve is not None else default_curve()
affine_x, affine_y = coords
if type(affine_x) == int:
affine_x = openssl._int_to_bn(affine_x, curve=curve)
if type(affine_y) == int:
affine_y = openssl._int_to_bn(affine_y, curve=curve)
ec_point = openssl._get_EC_POINT_via_affine(affine_x, affine_y, curve)
return cls(ec_point, curve)