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<a href="#p11-kit-Utilities.description" class="shortcut">Description</a>
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<h2><span class="refentrytitle"><a name="p11-kit-Utilities.top_of_page"></a>Utilities</span></h2>
<p>Utilities — PKCS#11 utilities</p>
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<a name="p11-kit-Utilities.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">const <span class="returnvalue">char</span> * <a class="link" href="p11-kit-Utilities.html#p11-kit-strerror" title="p11_kit_strerror ()">p11_kit_strerror</a> (<em class="parameter"><code><a href="http://developer.gnome.org/gck/stable/pkcs11-links.html#CK-RV:CAPS"><span class="type">CK_RV</span></a> rv</code></em>);
const <span class="returnvalue">char</span> * <a class="link" href="p11-kit-Utilities.html#p11-kit-message" title="p11_kit_message ()">p11_kit_message</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">char</span> * <a class="link" href="p11-kit-Utilities.html#p11-kit-space-strdup" title="p11_kit_space_strdup ()">p11_kit_space_strdup</a> (<em class="parameter"><code>const unsigned <span class="type">char</span> *string</code></em>,
<em class="parameter"><code><span class="type">size_t</span> max_length</code></em>);
<span class="returnvalue">size_t</span> <a class="link" href="p11-kit-Utilities.html#p11-kit-space-strlen" title="p11_kit_space_strlen ()">p11_kit_space_strlen</a> (<em class="parameter"><code>const unsigned <span class="type">char</span> *string</code></em>,
<em class="parameter"><code><span class="type">size_t</span> max_length</code></em>);
</pre>
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<div class="refsect1">
<a name="p11-kit-Utilities.description"></a><h2>Description</h2>
<p>
Utility functions for working with PKCS#11.
</p>
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<div class="refsect1">
<a name="p11-kit-Utilities.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="p11-kit-strerror"></a><h3>p11_kit_strerror ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> * p11_kit_strerror (<em class="parameter"><code><a href="http://developer.gnome.org/gck/stable/pkcs11-links.html#CK-RV:CAPS"><span class="type">CK_RV</span></a> rv</code></em>);</pre>
<p>
Get a message for a PKCS#11 return value or error code. Do not
pass CKR_OK or other such non errors to this function.
</p>
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<td><p><span class="term"><em class="parameter"><code>rv</code></em> :</span></p></td>
<td>The code to get a message for.</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The user readable and localized message.</td>
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<div class="refsect2">
<a name="p11-kit-message"></a><h3>p11_kit_message ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> * p11_kit_message (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Gets the failure message for a recently called p11-kit function, which
returned a failure code on this thread. Not all functions set this message.
Each function that does so, will note it in its documentation.
</p>
<p>
If the most recent p11-kit function did not fail, then this will return NULL.
The string is owned by the p11-kit library and is only valid on the same
thread that the failed function executed on.
</p>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The last failure message, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td>
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<div class="refsect2">
<a name="p11-kit-space-strdup"></a><h3>p11_kit_space_strdup ()</h3>
<pre class="programlisting"><span class="returnvalue">char</span> * p11_kit_space_strdup (<em class="parameter"><code>const unsigned <span class="type">char</span> *string</code></em>,
<em class="parameter"><code><span class="type">size_t</span> max_length</code></em>);</pre>
<p>
In PKCS#11 structures many strings are encoded in a strange way. The string
is placed in a fixed length buffer and then padded with spaces.
</p>
<p>
This function copies the space padded string into a normal null-terminated
string. The result is owned by the caller.
</p>
<p>
</p>
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<td class="listing_lines" align="right"><pre>1
2
3
4</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="usertype">CK_INFO</span><span class="normal"> info</span><span class="symbol">;</span>
<span class="type">char</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">description</span><span class="symbol">;</span>
<span class="normal"> </span><span class="symbol">...</span>
<span class="normal">description </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="p11-kit-Utilities.html#p11-kit-space-strdup">p11_kit_space_strdup</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">info</span><span class="symbol">-></span><span class="normal">libraryDescription</span><span class="symbol">,</span><span class="normal"> </span><span class="keyword">sizeof</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">info</span><span class="symbol">-></span><span class="normal">libraryDescription</span><span class="symbol">));</span></pre></td>
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<td><p><span class="term"><em class="parameter"><code>string</code></em> :</span></p></td>
<td>Pointer to string block</td>
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<td><p><span class="term"><em class="parameter"><code>max_length</code></em> :</span></p></td>
<td>Maximum length of string block</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The newly allocated string, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if memory could not be allocated.</td>
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<hr>
<div class="refsect2">
<a name="p11-kit-space-strlen"></a><h3>p11_kit_space_strlen ()</h3>
<pre class="programlisting"><span class="returnvalue">size_t</span> p11_kit_space_strlen (<em class="parameter"><code>const unsigned <span class="type">char</span> *string</code></em>,
<em class="parameter"><code><span class="type">size_t</span> max_length</code></em>);</pre>
<p>
In PKCS#11 structures many strings are encoded in a strange way. The string
is placed in a fixed length buffer and then padded with spaces.
</p>
<p>
This function determines the actual length of the string. Since the string
is not null-terminated you need to pass in the size of buffer as max_length.
The string will never be longer than this buffer.
</p>
<p>
</p>
<div class="informalexample">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
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<td class="listing_lines" align="right"><pre>1
2
3
4</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="usertype">CK_INFO</span><span class="normal"> info</span><span class="symbol">;</span>
<span class="usertype">size_t</span><span class="normal"> length</span><span class="symbol">;</span>
<span class="normal"> </span><span class="symbol">...</span>
<span class="normal">length </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="p11-kit-Utilities.html#p11-kit-space-strlen">p11_kit_space_strlen</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">info</span><span class="symbol">-></span><span class="normal">libraryDescription</span><span class="symbol">,</span><span class="normal"> </span><span class="keyword">sizeof</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">info</span><span class="symbol">-></span><span class="normal">libraryDescription</span><span class="symbol">));</span></pre></td>
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<td><p><span class="term"><em class="parameter"><code>string</code></em> :</span></p></td>
<td>Pointer to string block</td>
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<td><p><span class="term"><em class="parameter"><code>max_length</code></em> :</span></p></td>
<td>Maximum length of string block</td>
</tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The length of the space padded string.</td>
</tr>
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