[openssl-users] session resumption tls1.2/tls1.3

Neetish Pathak npathak2 at ncsu.edu
Thu Jul 13 22:52:42 UTC 2017

Hi All,
Help with these queries please,

1) Is it possible to use external session files (with session info as
identifiers or tickets for out of band resumption) for session resumption
in TLS 1.2. Does it need some kind of callback like the way it is used in
TLS 1.3  with (SSL_set_psk_find_session_callback) /

2) In TLS 1.3, is early data not enabled for out of band PSK session
resumption. Is it only possible with in-band session resumption.
SSL_write_early_data always fails when I load a session from a session file
to perform external PSK resumption before sending the session data. For
in-band resumption it succeeds.

Best Regards,
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