def generate_session_key(self, client_eph, verifier):
assert self.server_ephemeral
scramble = Srp._scramble_a_b(client_eph, self.server_ephemeral)
pow_verifier = pow(verifier, scramble, Srp.MODULUS)
pow_verifier *= client_eph
to_interleave = pow(pow_verifier, self.priv_ephemeral, Srp.MODULUS)
self.session_key = sha1_interleave(to_interleave)
def test_sha1_interleave(self):
big_int = 1555674156741514756417567416567415647156
expected = \
b"6\xa0\xf9\xcf\x1f\xe01\x96\xfc\x87\xd7F-\x88\xfd\x9a\xd0\xa5" \
b"\xe0C\xdb\xdc\xfb\xf7\xf7\x04\x8b\xa8\x12\r/4SjR^7:\x86U"
result = sha1.sha1_interleave(big_int)
self.assertEquals(result, expected)
def generate_session_key(self, client_eph, verifier):
assert self.server_ephemeral
scramble = Srp._scramble_a_b(client_eph, self.server_ephemeral)
pow_verifier = pow(verifier, scramble, Srp.MODULUS)
pow_verifier *= client_eph
to_interleave = pow(pow_verifier, self.priv_ephemeral, Srp.MODULUS)
self.session_key = sha1_interleave(to_interleave)
