def load_my_key(self, tup=None):
if self.replay.can_replay("dsa_private_key") and self.replay.can_replay("dsa_public_key"):
self.my_private_key = self.replay.load_dsa_key()
else:
if tup is None:
self.my_private_key = OtrDSA.make_key()
else:
self.my_private_key = DSA.construct(tup)
self.my_public_key = self.my_private_key.publickey()
self.my_q_len = OtrDSA.calc_q_len(self.my_private_key)
def load_dsa_key(self):
assert self.can_replay('dsa_public_key')
assert self.can_replay('dsa_private_key')
key = self.data['dsa_public_key']
priv_key = self.data['dsa_private_key']
key_reader = ByteStreamReader(key)
p = _OT.mpi_to_int(key_reader.get_mpi())
q = _OT.mpi_to_int(key_reader.get_mpi())
g = _OT.mpi_to_int(key_reader.get_mpi())
y = _OT.mpi_to_int(key_reader.get_mpi())
assert (key_reader.consumed_all())
priv_key_reader = ByteStreamReader(priv_key)
x = _OT.mpi_to_int(priv_key_reader.get_mpi())
assert (priv_key_reader.consumed_all())
return DSA.construct((y,g,p,q,x))
def make_key():
rp = RandomPool()
return DSA.generate(OtrDSA.dsa_len, rp.get_bytes)
def load_their_key(self, tup):
self.their_public_key = DSA.construct(tup)
self.their_q_len = OtrDSA.calc_q_len(self.their_public_key)
