[gnutls-devel] GnuTLS | tls1.3: server returns early on handshake when no cert is provided by client (!711)
Development of GNU's TLS library
gnutls-devel at lists.gnutls.org
Fri Jul 27 15:57:38 CEST 2018
Nikos Mavrogiannopoulos commented on a discussion on lib/handshake-tls13.c:
> + IMED_RET("generate app keys", ret, 0);
> +
> + ret = _tls13_write_connection_state_init(session, STAGE_APP);
> + IMED_RET("set write app keys", ret, 0);
> +
> + _gnutls_handshake_log("HSK[%p]: switching early to application traffic keys\n", session);
> + }
> +
> + /* fall through */
> + case STATE108:
> + if (session->internals.resumed != RESUME_FALSE)
> + _gnutls_set_resumed_parameters(session);
> +
> + /* If we didn't request a client certificate we can send tickets now
> + * and return early */
> + if (session->internals.hsk_flags & HSK_EARLY_START_USED) {
Reading the above again, actually the code above doesn't do it only for the unauthenticated client, but also for PSK. Ouch. Updating.
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