def __init__(self, curve, os_key=None, private_key=None):
'''
Constructor
'''
if not isinstance(curve, ec_curve.Curve):
raise Exception('Provided curve is not a Curve object')
self.curve = curve
self.os_group = curve.os_group
if os_key is not None:
self.os_key = os_key
else:
self.os_key = OpenSSL.EC_KEY_new()
OpenSSL.EC_KEY_set_group(self.os_key, self.os_group)
if private_key is not None:
privk = ec_bignum.BigNum(decval=private_key)
pubk = private_key * curve.G
OpenSSL.EC_KEY_set_private_key(self.os_key, privk.bn)
OpenSSL.EC_KEY_set_public_key(self.os_key, pubk.os_point)
else:
OpenSSL.EC_KEY_generate_key(self.os_key)
try:
priv_key = ec_bignum.BigNum(
OpenSSL.EC_KEY_get0_private_key(self.os_key))
self.private_key = priv_key.get_value()
self.public_key = ec_point.Point(
self.curve,
openssl_point=OpenSSL.EC_KEY_get0_public_key(self.os_key))
finally:
del priv_key