def sign(self, msghash: bytes) -> bytes:
"""
Signs a hashed message and returns a signature.
:param msghash: The hashed message to sign
:return: Signature in bytes
"""
v, r, s = API.ecdsa_sign(msghash, self.privkey)
return API.ecdsa_gen_sig(v, r, s)
def test_ecdsa_load_sig(self):
v = 1
r = int.from_bytes(api.secure_random(32), byteorder='big')
s = int.from_bytes(api.secure_random(32), byteorder='big')
sig = api.ecdsa_gen_sig(v, r, s)
self.assertEqual(bytes, type(sig))
self.assertEqual(65, len(sig))
loaded_sig = api.ecdsa_load_sig(sig)
self.assertEqual(tuple, type(loaded_sig))
self.assertEqual(3, len(loaded_sig))
self.assertEqual((v, r, s), loaded_sig)
def test_ecdsa_gen_sig(self):
v, r, s = 1, 2, 3
sig = api.ecdsa_gen_sig(v, r, s)
self.assertEqual(bytes, type(sig))
def __bytes__(self):
"""
Implements the __bytes__ call for Signature to transform into a
transportable mode.
"""
return API.ecdsa_gen_sig(self._v, self._r, self._s)