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<title>GnuTLS 3.5.4: PKCS11 Manual Initialization</title>
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<a name="PKCS11-Manual-Initialization"></a>
<div class="header">
<p>
Next: <a href="Accessing-objects-that-require-a-PIN.html#Accessing-objects-that-require-a-PIN" accesskey="n" rel="next">Accessing objects that require a PIN</a>, Previous: <a href="PKCS11-Initialization.html#PKCS11-Initialization" accesskey="p" rel="prev">PKCS11 Initialization</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="Manual-initialization-of-user_002dspecific-modules"></a>
<h4 class="subsection">5.3.2 Manual initialization of user-specific modules</h4>
<p>In systems where one cannot rely on a globally available p11-kit configuration
to be available, it is still possible to utilize PKCS #11 objects. That
can be done by loading directly the PKCS #11 shared module in the
application using <a href="PKCS-11-API.html#gnutls_005fpkcs11_005fadd_005fprovider">gnutls_pkcs11_add_provider</a>, after having
called <a href="PKCS-11-API.html#gnutls_005fpkcs11_005finit">gnutls_pkcs11_init</a> specifying the <code>GNUTLS_PKCS11_FLAG_MANUAL</code>
flag.
</p>
<dl>
<dt><a name="index-gnutls_005fpkcs11_005fadd_005fprovider"></a>Function: <em>int</em> <strong>gnutls_pkcs11_add_provider</strong> <em>(const char * <var>name</var>, const char * <var>params</var>)</em></dt>
<dd><p><var>name</var>: The filename of the module
</p>
<p><var>params</var>: should be NULL or a known string (see description)
</p>
<p>This function will load and add a PKCS 11 module to the module
list used in gnutls. After this function is called the module will
be used for PKCS 11 operations.
</p>
<p>When loading a module to be used for certificate verification,
use the string ’trusted’ as <code>params</code> .
</p>
<p>Note that this function is not thread safe.
</p>
<p><strong>Returns:</strong> On success, <code>GNUTLS_E_SUCCESS</code> (0) is returned, otherwise a
negative error value.
</p>
<p><strong>Since:</strong> 2.12.0
</p></dd></dl>
<p>In that case, the application will only have access to the modules explictly
loaded. If the <code>GNUTLS_PKCS11_FLAG_MANUAL</code> flag is specified and no calls
to <a href="PKCS-11-API.html#gnutls_005fpkcs11_005fadd_005fprovider">gnutls_pkcs11_add_provider</a> are made, then the PKCS #11 functionality
is effectively disabled.
</p>
<dl>
<dt><a name="index-gnutls_005fpkcs11_005finit"></a>Function: <em>int</em> <strong>gnutls_pkcs11_init</strong> <em>(unsigned int <var>flags</var>, const char * <var>deprecated_config_file</var>)</em></dt>
<dd><p><var>flags</var>: An ORed sequence of <code>GNUTLS_PKCS11_FLAG_</code> *
</p>
<p><var>deprecated_config_file</var>: either NULL or the location of a deprecated
configuration file
</p>
<p>This function will initialize the PKCS 11 subsystem in gnutls. It will
read configuration files if <code>GNUTLS_PKCS11_FLAG_AUTO</code> is used or allow
you to independently load PKCS 11 modules using <code>gnutls_pkcs11_add_provider()</code>
if <code>GNUTLS_PKCS11_FLAG_MANUAL</code> is specified.
</p>
<p>You don’t need to call this function since GnuTLS 3.3.0 because it is being called
during the first request PKCS 11 operation. That call will assume the <code>GNUTLS_PKCS11_FLAG_AUTO</code>
flag. If another flags are required then it must be called independently
prior to any PKCS 11 operation.
</p>
<p><strong>Returns:</strong> On success, <code>GNUTLS_E_SUCCESS</code> (0) is returned, otherwise a
negative error value.
</p>
<p><strong>Since:</strong> 2.12.0
</p></dd></dl>
<hr>
<div class="header">
<p>
Next: <a href="Accessing-objects-that-require-a-PIN.html#Accessing-objects-that-require-a-PIN" accesskey="n" rel="next">Accessing objects that require a PIN</a>, Previous: <a href="PKCS11-Initialization.html#PKCS11-Initialization" accesskey="p" rel="prev">PKCS11 Initialization</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>
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