SSL_set_num_tickets, SSL_get_num_tickets, SSL_CTX_set_num_tickets,
SSL_CTX_get_num_tickets - control the number of TLSv1.3 session tickets that
int SSL_set_num_tickets(SSL *s, size_t num_tickets);
size_t SSL_get_num_tickets(SSL *s);
int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets);
size_t SSL_CTX_get_num_tickets(SSL_CTX *ctx);
can be called
for a server application and set the number of session tickets that will be
sent to the client after a full handshake. Set the desired value (which could
be 0) in the num_tickets
argument. Typically these functions should be
called before the start of the handshake.
The default number of tickets is 2; the default number of tickets sent following
a resumption handshake is 1 but this cannot be changed using these functions.
The number of tickets following a resumption handshake can be reduced to 0
using custom session ticket callbacks (see
Tickets are also issued on receipt of a post-handshake certificate from the
client following a request by the server using
(3). These new tickets will be
associated with the updated client identity (i.e. including their certificate
and verification status). The number of tickets issued will normally be the
same as was used for the initial handshake. If the initial handshake was a
full handshake then SSL_set_num_tickets()
can be called again prior to
to update the number of
tickets that will be sent.
number of tickets set by a previous call to SSL_CTX_set_num_tickets()
, or 2 if no such call has been made.
return 1 on
success or 0 on failure.
number of tickets that have been previously set.
These functions were added in OpenSSL 1.1.1.
Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy in the
file LICENSE in the source distribution or at