diff options
| -rw-r--r-- | pyecsca/ec/formula/switch_sign.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/pyecsca/ec/formula/switch_sign.py b/pyecsca/ec/formula/switch_sign.py index 9f19629..5a52ebc 100644 --- a/pyecsca/ec/formula/switch_sign.py +++ b/pyecsca/ec/formula/switch_sign.py @@ -63,6 +63,9 @@ def sign_test(output_signs: Dict[str, int], coordinate_model: Any): try: apoint = point.to_affine() except NotImplementedError: + # Ignore switch signs if we cannot test them. + if scale is None: + raise BadSignSwitch apoint = scale(p, point)[0] if set(apoint.coords.values()) != set([Mod(1, p)]): raise BadSignSwitch |