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<h2><span class="refentrytitle"><a name="gcr-Key-Fingerprints.top_of_page"></a>Key Fingerprints</span></h2>
<p>Key Fingerprints — Fingerprints for public and private keys</p>
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<div class="refsect1">
<a name="gcr-Key-Fingerprints.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
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<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="returnvalue">guchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="gcr-Key-Fingerprints.html#gcr-fingerprint-from-attributes" title="gcr_fingerprint_from_attributes ()">gcr_fingerprint_from_attributes</a> <span class="c_punctuation">()</span>
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<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="returnvalue">guchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="gcr-Key-Fingerprints.html#gcr-fingerprint-from-subject-public-key-info" title="gcr_fingerprint_from_subject_public_key_info ()">gcr_fingerprint_from_subject_public_key_info</a> <span class="c_punctuation">()</span>
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<div class="refsect1">
<a name="gcr-Key-Fingerprints.description"></a><h2>Description</h2>
<p>These functions generate key fingerprints for public keys, certificates and
key data. The fingerprints are created so that they they will be identical
for a key and its corresponding certificate.</p>
<p>Note that in the case of certificates these are not fingerprints of the
actual certificate data, but rather of the public key contained in a
certificate.</p>
<p>These fingerprints are created using the subjectPublicKeyInfo ASN.1 structure.</p>
</div>
<div class="refsect1">
<a name="gcr-Key-Fingerprints.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gcr-fingerprint-from-attributes"></a><h3>gcr_fingerprint_from_attributes ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="returnvalue">guchar</span></a> *
gcr_fingerprint_from_attributes (<em class="parameter"><code><span class="type">GckAttributes</span> *attrs</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Data-Checksums.html#GChecksumType"><span class="type">GChecksumType</span></a> checksum_type</code></em>,
<em class="parameter"><code><span class="type">gsize</span> *n_fingerprint</code></em>);</pre>
<p>Create a key fingerprint for a certificate, public key or private key.
Note that this is not a fingerprint of certificate data, which you would
use <a class="link" href="GcrCertificate.html#gcr-certificate-get-fingerprint" title="gcr_certificate_get_fingerprint ()"><code class="function">gcr_certificate_get_fingerprint()</code></a> for.</p>
<div class="refsect3">
<a name="id-1.7.4.5.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
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<td class="parameter_name"><p>attrs</p></td>
<td class="parameter_description"><p>attributes for key or certificate</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>checksum_type</p></td>
<td class="parameter_description"><p>the type of fingerprint to create</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n_fingerprint</p></td>
<td class="parameter_description"><p>the length of fingerprint returned</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
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<div class="refsect3">
<a name="id-1.7.4.5.2.6"></a><h4>Returns</h4>
<p> the
fingerprint or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the input was invalid. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=n_fingerprint]</span></p>
</div>
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<hr>
<div class="refsect2">
<a name="gcr-fingerprint-from-subject-public-key-info"></a><h3>gcr_fingerprint_from_subject_public_key_info ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="returnvalue">guchar</span></a> *
gcr_fingerprint_from_subject_public_key_info
(<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"><span class="type">guchar</span></a> *key_info</code></em>,
<em class="parameter"><code><span class="type">gsize</span> n_key_info</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Data-Checksums.html#GChecksumType"><span class="type">GChecksumType</span></a> checksum_type</code></em>,
<em class="parameter"><code><span class="type">gsize</span> *n_fingerprint</code></em>);</pre>
<p>Create a key fingerprint for a DER encoded subjectPublicKeyInfo.</p>
<div class="refsect3">
<a name="id-1.7.4.5.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>key_info</p></td>
<td class="parameter_description"><p> DER encoded subjectPublicKeyInfo structure. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=n_key_info]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>n_key_info</p></td>
<td class="parameter_description"><p>length of DER encoded structure</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>checksum_type</p></td>
<td class="parameter_description"><p>the type of fingerprint to create</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n_fingerprint</p></td>
<td class="parameter_description"><p>the length of fingerprint returned</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.7.4.5.3.6"></a><h4>Returns</h4>
<p> the
fingerprint or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the input was invalid. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=n_fingerprint]</span></p>
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</div>
</div>
<div class="refsect1">
<a name="gcr-Key-Fingerprints.other_details"></a><h2>Types and Values</h2>
</div>
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