def __init__(self,
public_key: VerifyingKey,
chain_code,
index,
depth,
parent_fingerprint=b'\x00\x00\x00\x00'):
super().__init__(public_key, chain_code, index, depth,
parent_fingerprint)
x_str = util.number_to_string(self._key.pubkey.point.x(),
self._key.pubkey.order)
if self._key.pubkey.point.y() % 2 == 0:
self._compressed_key = util.b('\x02') + x_str
else:
self._compressed_key = util.b('\x03') + x_str
def ec_get_pubkey_by_prikey(privateKey: bytes, curveName):
if curveName == Curve.P256:
private_key = SigningKey.from_string(string=(privateKey), curve=NIST256p)
# public_key = private_key.get_verifying_key().to_string()
verifying_key = private_key.get_verifying_key()
order = verifying_key.pubkey.order
x_str = util.number_to_string(verifying_key.pubkey.point.x(), order)
y_str = util.number_to_string(verifying_key.pubkey.point.y(), order)
point_str = util.b("\x04") + x_str + y_str
if verifying_key.pubkey.point.y() % 2 == 0:
point_str = util.b("\x02") + x_str
else:
point_str = util.b("\x03") + x_str
else:
raise TypeError
return point_str
def ec_get_pubkey_by_prikey(privateKey: bytes, curve_name):
if curve_name == Curve.P256:
private_key = SigningKey.from_string(string=(privateKey), curve=NIST256p)
# public_key = private_key.get_verifying_key().to_string()
verifying_key = private_key.get_verifying_key()
order = verifying_key.pubkey.order
x_str = util.number_to_string(verifying_key.pubkey.point.x(), order)
# TODO: add verify
# y_str = util.number_to_string(verifying_key.pubkey.point.y(), order)
# point_str = util.b("\x04") + x_str + y_str
if verifying_key.pubkey.point.y() % 2 == 0:
point_str = util.b("\x02") + x_str
else:
point_str = util.b("\x03") + x_str
elif curve_name == Curve.P224:
raise SDKException(ErrorCode.unsupported_key_type)
elif curve_name == Curve.P384:
raise SDKException(ErrorCode.unsupported_key_type)
elif curve_name == Curve.P521:
raise SDKException(ErrorCode.unsupported_key_type)
else:
raise SDKException(ErrorCode.unknown_key_type)
return point_str
def ec_get_public_key_by_private_key(private_key: bytes,
curve_name) -> bytes:
if curve_name == Curve.P256:
private_key = SigningKey.from_string(string=private_key,
curve=curves.NIST256p)
verifying_key = private_key.get_verifying_key()
order = verifying_key.pubkey.order
x_int = verifying_key.pubkey.point.x()
y_int = verifying_key.pubkey.point.y()
x_str = util.number_to_string(x_int, order)
if y_int % 2 == 0:
point_str = util.b('\x02') + x_str
else:
point_str = util.b('\x03') + x_str
elif curve_name == Curve.P224:
raise SDKException(ErrorCode.unsupported_key_type)
elif curve_name == Curve.P384:
raise SDKException(ErrorCode.unsupported_key_type)
elif curve_name == Curve.P521:
raise SDKException(ErrorCode.unsupported_key_type)
else:
raise SDKException(ErrorCode.unsupported_key_type)
return point_str
