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<title>GnuTLS 3.5.4: Associating the credentials</title>
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<a name="Associating-the-credentials"></a>
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Next: <a href="Setting-up-the-transport-layer.html#Setting-up-the-transport-layer" accesskey="n" rel="next">Setting up the transport layer</a>, Previous: <a href="Session-initialization.html#Session-initialization" accesskey="p" rel="prev">Session initialization</a>, Up: <a href="How-to-use-GnuTLS-in-applications.html#How-to-use-GnuTLS-in-applications" accesskey="u" rel="up">How to use GnuTLS in applications</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="Associating-the-credentials-1"></a>
<h3 class="section">6.4 Associating the credentials</h3>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">• <a href="Certificate-credentials.html#Certificate-credentials" accesskey="1">Certificate credentials</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="SRP-credentials.html#SRP-credentials" accesskey="2">SRP credentials</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="PSK-credentials.html#PSK-credentials" accesskey="3">PSK credentials</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Anonymous-credentials.html#Anonymous-credentials" accesskey="4">Anonymous credentials</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
</table>
<p>Each authentication method is associated with a key exchange method, and a credentials type.
The contents of the credentials is method-dependent, e.g. certificates
for certificate authentication and should be initialized and associated
with a session (see <a href="Core-TLS-API.html#gnutls_005fcredentials_005fset">gnutls_credentials_set</a>). A mapping of the key exchange methods
with the credential types is shown in <a href="#tab_003akey_002dexchange_002dcred">Table 6.2</a>.
</p>
<div class="float"><a name="tab_003akey_002dexchange_002dcred"></a>
<table>
<thead><tr><th width="25%">Authentication method</th><th width="25%">Key exchange</th><th width="20%">Client credentials</th><th width="20%">Server credentials</th></tr></thead>
<tr><td width="25%">Certificate</td><td width="25%"><code>KX_RSA</code>,
<code>KX_DHE_RSA</code>,
<code>KX_DHE_DSS</code>,
<code>KX_ECDHE_RSA</code>,
<code>KX_ECDHE_ECDSA</code></td><td width="20%"><code>CRD_CERTIFICATE</code></td><td width="20%"><code>CRD_CERTIFICATE</code></td></tr>
<tr><td width="25%">Password and certificate</td><td width="25%"><code>KX_SRP_RSA</code>, <code>KX_SRP_DSS</code></td><td width="20%"><code>CRD_SRP</code></td><td width="20%"><code>CRD_CERTIFICATE</code>, <code>CRD_SRP</code></td></tr>
<tr><td width="25%">Password</td><td width="25%"><code>KX_SRP</code></td><td width="20%"><code>CRD_SRP</code></td><td width="20%"><code>CRD_SRP</code></td></tr>
<tr><td width="25%">Anonymous</td><td width="25%"><code>KX_ANON_DH</code>,
<code>KX_ANON_ECDH</code></td><td width="20%"><code>CRD_ANON</code></td><td width="20%"><code>CRD_ANON</code></td></tr>
<tr><td width="25%">Pre-shared key</td><td width="25%"><code>KX_PSK</code>,
<code>KX_DHE_PSK</code>, <code>KX_ECDHE_PSK</code></td><td width="20%"><code>CRD_PSK</code></td><td width="20%"><code>CRD_PSK</code></td></tr>
</table>
<div class="float-caption"><p><strong>Table 6.2: </strong>Key exchange algorithms and the corresponding credential types.</p></div></div>
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