I get this on the moriatoo relay, which is running git master and is also hooked up to a bwauth. The messages around it are: ``` Sep 04 03:21:11.000 [warn] Invalid result from curve25519 handshake: 4 Sep 04 03:21:11.000 [warn] onion_skin_client_handshake failed. Sep 04 03:21:11.000 [warn] circuit_finish_handshake failed. ``` It actually happens not infrequently, so it's not just a one-off thing. The code is ``` if (bad) { log_warn(LD_PROTOCOL, "Invalid result from curve25519 handshake: %d", bad); } ``` and I think 4 shows up when ``` bad |= (tor_memneq(s.auth, auth_candidate, DIGEST256_LEN) << 2); ``` So I guess the first issue is that "4" is really not a helpful error message for me. The second issue is to wonder what's gone wrong and whether there's a deeper bug.