def validate_or_raise(self) -> bool:
"""
This method will validate a transaction and raise exception if problems are found
:return: True if the exception is valid, exceptions otherwise
:rtype: bool
"""
if not isinstance(self, TYPEMAP[self.subtype]):
raise TypeError('Invalid subtype: Found: %s Expected: %s',
type(self), TYPEMAP[self.subtype])
if not self._validate_custom():
raise ValueError("Custom validation failed")
# cryptographic checks
if self.txhash != self.calculate_txhash():
raise ValueError("Invalid transaction hash")
# FIXME: Why is coinbase skipped?
if not isinstance(self, CoinBase) and not isinstance(self, Vote) and \
getAddress('Q', self.PK) != self.txfrom.decode():
raise ValueError('Public key and address dont match')
if len(self.signature) == 0 or not XMSS.VERIFY(
message=self.txhash, signature=self.signature, pk=self.PK):
raise ValueError("Invalid xmss signature")
return True
def validate_signed_hash(self):
if XMSS.VERIFY(self.txhash,
[self.i, self.signature, self.merkle_path, self.i_bms, self.pub, self.PK]) is False:
logger.info('xmss_verify failed')
return False
if XMSS.checkaddress(self.PK, self.txfrom) is False:
logger.info('Public key verification failed')
return False
return True
def _validate_signed_hash(self, height=config.dev.xmss_tree_height):
if self.subtype != TX_SUBTYPE_COINBASE and getAddress('Q', self.PK) != self.txfrom:
logger.warning('Public key verification failed')
return False
if not XMSS.VERIFY(message=self.txhash,
signature=self.signature,
pk=self.PK,
height=height):
logger.warning('xmss_verify failed')
return False
return True
def test_sign_verify(self):
message = "This is a test"
message_bin = str2bin(message)
xmss_height = 10
seed = bytearray([i for i in range(48)])
xmss = XMSS(xmss_height, seed)
pk = xmss.pk()
xmss.set_index(1)
for i in range(10):
self.assertTrue(xmss.get_index() == i + 1)
signature = xmss.SIGN(message_bin)
self.assertTrue(XMSS.VERIFY(message_bin, signature, pk))
def measure_xmss_verification_time(s, m):
start_time = time.time()
answer = XMSS.VERIFY(m, s, None)
total_time = time.time() - start_time
return answer, total_time
