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<title>GnuTLS 3.5.3: Using a PKCS11 token with TLS</title>
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<a name="Using-a-PKCS11-token-with-TLS"></a>
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<p>
Next: <a href="p11tool-Invocation.html#p11tool-Invocation" accesskey="n" rel="next">p11tool Invocation</a>, Previous: <a href="Writing-objects.html#Writing-objects" accesskey="p" rel="prev">Writing objects</a>, Up: <a href="Smart-cards-and-HSMs.html#Smart-cards-and-HSMs" accesskey="u" rel="up">Smart cards and HSMs</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>
</div>
<hr>
<a name="Using-a-PKCS-_002311-token-with-TLS"></a>
<h4 class="subsection">5.3.6 Using a <acronym>PKCS</acronym> #11 token with TLS</h4>
<p>It is possible to use a <acronym>PKCS</acronym> #11 token to a TLS
session, as shown in <a href="Client-using-a-smart-card-with-TLS.html#ex_002dpkcs11_002dclient">ex-pkcs11-client</a>. In addition
the following functions can be used to load PKCS #11 key and
certificates by specifying a PKCS #11 URL instead of a filename.
</p>
<dl compact="compact">
<dt><code><var>int</var> <a href="Core-TLS-API.html#gnutls_005fcertificate_005fset_005fx509_005ftrust_005ffile">gnutls_certificate_set_x509_trust_file</a> (gnutls_certificate_credentials_t <var>cred</var>, const char * <var>cafile</var>, gnutls_x509_crt_fmt_t <var>type</var>)</code></dt>
<dt><code><var>int</var> <a href="Core-TLS-API.html#gnutls_005fcertificate_005fset_005fx509_005fkey_005ffile2">gnutls_certificate_set_x509_key_file2</a> (gnutls_certificate_credentials_t <var>res</var>, const char * <var>certfile</var>, const char * <var>keyfile</var>, gnutls_x509_crt_fmt_t <var>type</var>, const char * <var>pass</var>, unsigned int <var>flags</var>)</code></dt>
</dl>
<dl>
<dt><a name="index-gnutls_005fcertificate_005fset_005fx509_005fsystem_005ftrust"></a>Function: <em>int</em> <strong>gnutls_certificate_set_x509_system_trust</strong> <em>(gnutls_certificate_credentials_t <var>cred</var>)</em></dt>
<dd><p><var>cred</var>: is a <code>gnutls_certificate_credentials_t</code> type.
</p>
<p>This function adds the system’s default trusted CAs in order to
verify client or server certificates.
</p>
<p>In the case the system is currently unsupported <code>GNUTLS_E_UNIMPLEMENTED_FEATURE</code>
is returned.
</p>
<p><strong>Returns:</strong> the number of certificates processed or a negative error code
on error.
</p>
<p><strong>Since:</strong> 3.0.20
</p></dd></dl>
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