108 lines
3.9 KiB
HTML
Executable File
108 lines
3.9 KiB
HTML
Executable File
<?xml version="1.0" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>SSL_CTX_set_num_tickets</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<link rev="made" href="mailto:root@localhost" />
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</head>
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<body style="background-color: white">
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<!-- INDEX BEGIN -->
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<div name="index">
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<p><a name="__index__"></a></p>
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<ul>
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<li><a href="#name">NAME</a></li>
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<li><a href="#synopsis">SYNOPSIS</a></li>
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<li><a href="#description">DESCRIPTION</a></li>
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<li><a href="#return_values">RETURN VALUES</a></li>
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<li><a href="#see_also">SEE ALSO</a></li>
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<li><a href="#history">HISTORY</a></li>
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<li><a href="#copyright">COPYRIGHT</a></li>
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</ul>
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<hr name="index" />
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</div>
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<!-- INDEX END -->
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<p>
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</p>
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<hr />
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<h1><a name="name">NAME</a></h1>
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<p>SSL_set_num_tickets,
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SSL_get_num_tickets,
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SSL_CTX_set_num_tickets,
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SSL_CTX_get_num_tickets
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- control the number of TLSv1.3 session tickets that are issued</p>
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<p>
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</p>
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<hr />
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<h1><a name="synopsis">SYNOPSIS</a></h1>
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<pre>
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#include <openssl/ssl.h></pre>
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<pre>
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int SSL_set_num_tickets(SSL *s, size_t num_tickets);
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size_t SSL_get_num_tickets(SSL *s);
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int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets);
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size_t SSL_CTX_get_num_tickets(SSL_CTX *ctx);</pre>
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<p>
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</p>
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<hr />
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<h1><a name="description">DESCRIPTION</a></h1>
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<p><code>SSL_CTX_set_num_tickets()</code> and <code>SSL_set_num_tickets()</code> can be called for a server
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application and set the number of TLSv1.3 session tickets that will be sent to
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the client after a full handshake. Set the desired value (which could be 0) in
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the <strong>num_tickets</strong> argument. Typically these functions should be called before
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the start of the handshake.</p>
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<p>The default number of tickets is 2; the default number of tickets sent following
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a resumption handshake is 1 but this cannot be changed using these functions.
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The number of tickets following a resumption handshake can be reduced to 0 using
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custom session ticket callbacks (see <em>SSL_CTX_set_session_ticket_cb(3)</em>).</p>
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<p>Tickets are also issued on receipt of a post-handshake certificate from the
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client following a request by the server using
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<em>SSL_verify_client_post_handshake(3)</em>. These new tickets will be associated
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with the updated client identity (i.e. including their certificate and
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verification status). The number of tickets issued will normally be the same as
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was used for the initial handshake. If the initial handshake was a full
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handshake then <code>SSL_set_num_tickets()</code> can be called again prior to calling
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<code>SSL_verify_client_post_handshake()</code> to update the number of tickets that will be
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sent.</p>
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<p><code>SSL_CTX_get_num_tickets()</code> and <code>SSL_get_num_tickets()</code> return the number of
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tickets set by a previous call to <code>SSL_CTX_set_num_tickets()</code> or
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<code>SSL_set_num_tickets()</code>, or 2 if no such call has been made.</p>
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<p>
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</p>
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<hr />
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<h1><a name="return_values">RETURN VALUES</a></h1>
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<p><code>SSL_CTX_set_num_tickets()</code> and <code>SSL_set_num_tickets()</code> return 1 on success or 0 on
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failure.</p>
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<p><code>SSL_CTX_get_num_tickets()</code> and <code>SSL_get_num_tickets()</code> return the number of tickets
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that have been previously set.</p>
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<p>
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</p>
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<hr />
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<h1><a name="see_also">SEE ALSO</a></h1>
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<p><em>ssl(7)</em></p>
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<p>
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</p>
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<hr />
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<h1><a name="history">HISTORY</a></h1>
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<p>These functions were added in OpenSSL 1.1.1.</p>
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<p>
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</p>
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<hr />
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<h1><a name="copyright">COPYRIGHT</a></h1>
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<p>Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.</p>
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<p>Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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<a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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</body>
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</html>
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