def parse_draw(msg_payload, sender_public_key):
previous_txid_bytes = msg_payload[:32]
sizes_offset = 32
msg_bytes_size_bytes = msg_payload[sizes_offset:sizes_offset + 2]
msg_size = int.from_bytes(msg_bytes_size_bytes, byteorder='big')
signed_previous_txid_size = msg_payload[sizes_offset + 2]
after_sizes_offset = 32 + 3
game_turn_ops = msg_payload[after_sizes_offset:after_sizes_offset +
msg_size]
after_game_turn_ops_offset = after_sizes_offset + msg_size
signed_previous_txid = msg_payload[
after_game_turn_ops_offset:after_game_turn_ops_offset +
signed_previous_txid_size + 1]
valid = format.verify_sig(signed_previous_txid, previous_txid_bytes,
sender_public_key)
if valid:
game_turn_ops_str = game_turn_ops.decode()
msg_draw = gc_message.MsgTmt(game_turn_ops_str)
previous_txid = previous_txid_bytes.hex()
return gc_message.MSG_DRW, msg_draw, previous_txid
return None
def parse_stt(msg_payload):
initiator_key_bytes = msg_payload[:33]
game_id_bytes = msg_payload[33:33 + 32]
sizes_offset = 33 + 32
signed_game_id_size = msg_payload[sizes_offset]
msg_bytes_size_bytes = msg_payload[sizes_offset + 1:sizes_offset + 1 + 2]
msg_size = int.from_bytes(msg_bytes_size_bytes, byteorder='big')
messages_offset = sizes_offset + 3
signed_game_id = msg_payload[messages_offset:messages_offset +
signed_game_id_size]
msg_data = msg_payload[messages_offset +
signed_game_id_size:messages_offset +
signed_game_id_size + msg_size]
valid = format.verify_sig(signed_game_id, game_id_bytes,
initiator_key_bytes)
if valid:
msg_data_str = msg_data.decode()
msg_stt = gc_message.MsgStt(initiator_key_bytes, msg_data_str)
return gc_message.MSG_STT, msg_stt, None
return None
def test_sign(self):
base_key = BaseKey()
data = os.urandom(200)
signature = base_key.sign(data)
assert verify_sig(signature, data, base_key.public_key)
def test_invalid(self):
assert not verify_sig(INVALID_SIGNATURE, DATA, PUBLIC_KEY_COMPRESSED)
from bitcash import PrivateKeyTestnet, format import gcl_secrets initiator_key = PrivateKeyTestnet(gcl_secrets.INITIATOR_PRIVATE_KEY) print(initiator_key.public_key) print(len(initiator_key.public_key)) message = b"123fsafsafsfsfsafsaffsafse3223gsdgbdbJGoeffffddw23abc" sig = initiator_key.sign(message) print(sig) print(len(sig)) pubkey = initiator_key.public_key print(len(initiator_key.public_key)) verified = format.verify_sig(sig, message, pubkey) print(verified)