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<a name="The-TLS-Handshake-Protocol"></a>
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<p>
Next: <a href="TLS-Extensions.html#TLS-Extensions" accesskey="n" rel="next">TLS Extensions</a>, Previous: <a href="The-TLS-Alert-Protocol.html#The-TLS-Alert-Protocol" accesskey="p" rel="prev">The TLS Alert Protocol</a>, Up: <a href="Introduction-to-TLS.html#Introduction-to-TLS" accesskey="u" rel="up">Introduction to TLS</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-and-Data-Index.html#Function-and-Data-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="The-TLS-handshake-protocol"></a>
<h3 class="section">3.5 The TLS handshake protocol</h3>
<a name="The-Handshake-Protocol"></a><a name="index-handshake-protocol"></a>
<p>The handshake protocol is responsible for the ciphersuite negotiation,
the initial key exchange, and the authentication of the two peers.
This is fully controlled by the application layer, thus your program
has to set up the required parameters. The main handshake function
is <a href="Core-TLS-API.html#gnutls_005fhandshake">gnutls_handshake</a>. In the next paragraphs we elaborate on
the handshake protocol, i.e., the ciphersuite negotiation.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">• <a href="TLS-Cipher-Suites.html#TLS-Cipher-Suites" accesskey="1">TLS Cipher Suites</a>:</td><td> </td><td align="left" valign="top">TLS session parameters.
</td></tr>
<tr><td align="left" valign="top">• <a href="Authentication.html#Authentication" accesskey="2">Authentication</a>:</td><td> </td><td align="left" valign="top">TLS authentication.
</td></tr>
<tr><td align="left" valign="top">• <a href="Client-Authentication.html#Client-Authentication" accesskey="3">Client Authentication</a>:</td><td> </td><td align="left" valign="top">Requesting a certificate from the client.
</td></tr>
<tr><td align="left" valign="top">• <a href="Resuming-Sessions.html#Resuming-Sessions" accesskey="4">Resuming Sessions</a>:</td><td> </td><td align="left" valign="top">Reusing previously established keys.
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