diff options
Diffstat (limited to 'pyecsca/ec/signature.py')
| -rw-r--r-- | pyecsca/ec/signature.py | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/pyecsca/ec/signature.py b/pyecsca/ec/signature.py index 8c8630b..1c239b5 100644 --- a/pyecsca/ec/signature.py +++ b/pyecsca/ec/signature.py @@ -68,7 +68,7 @@ class Signature(object): if add is None: if "add" not in mult.formulas: raise ValueError - else: + elif isinstance(mult.formulas["add"], AdditionFormula): add = mult.formulas["add"] self.mult = mult self.group = group @@ -124,6 +124,8 @@ class Signature(object): return self._do_sign(k, digest) def _do_verify(self, signature: SignatureResult, digest: bytes) -> bool: + if self.pubkey is None: + return False z = int.from_bytes(digest, byteorder="big") if len(digest) * 8 > self.group.order.bit_length(): z >>= len(digest) * 8 - self.group.order.bit_length() |