def test_signature_can_verify():
privkey = UmbralPrivateKey.gen_key()
message = b"peace at dawn"
der_sig_bytes = ecdsa_sign(message, privkey)
assert verify_ecdsa(message, der_sig_bytes, privkey.get_pubkey())
signature = Signature.from_bytes(der_sig_bytes, der_encoded=True)
assert signature.verify(message, privkey.get_pubkey())
def sign(self, message: bytes) -> bytes:
"""
Signs a hashed message and returns a signature.
:param message: The message to sign
:return: Signature in bytes
"""
signature_der_bytes = API.ecdsa_sign(message, self._privkey)
return Signature.from_bytes(signature_der_bytes, der_encoded=True)
def test_signature_rs_serialization():
privkey = UmbralPrivateKey.gen_key()
message = b"peace at dawn"
der_sig_bytes = ecdsa_sign(message, privkey)
signature_from_der = Signature.from_bytes(der_sig_bytes, der_encoded=True)
rs_sig_bytes = bytes(signature_from_der)
assert len(rs_sig_bytes) == 64
signature_from_rs = Signature.from_bytes(rs_sig_bytes, der_encoded=False)
assert signature_from_rs == signature_from_der
assert signature_from_rs == der_sig_bytes
assert signature_from_rs.verify(message, privkey.get_pubkey())
