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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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<div class="refsect1">
<a name="p11-kit-Utilities.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_proto_type">
<col class="functions_proto_name">
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<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="p11-kit-Utilities.html#p11-kit-strerror" title="p11_kit_strerror ()">p11_kit_strerror</a> <span class="c_punctuation">()</span>
</td>
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<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="p11-kit-Utilities.html#p11-kit-message" title="p11_kit_message ()">p11_kit_message</a> <span class="c_punctuation">()</span>
</td>
</tr>
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<td class="function_type">
<span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="p11-kit-Utilities.html#p11-kit-space-strdup" title="p11_kit_space_strdup ()">p11_kit_space_strdup</a> <span class="c_punctuation">()</span>
</td>
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<td class="function_type">
<span class="returnvalue">size_t</span>
</td>
<td class="function_name">
<a class="link" href="p11-kit-Utilities.html#p11-kit-space-strlen" title="p11_kit_space_strlen ()">p11_kit_space_strlen</a> <span class="c_punctuation">()</span>
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</tr>
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<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="p11-kit-Utilities.html#p11-kit-be-quiet" title="p11_kit_be_quiet ()">p11_kit_be_quiet</a> <span class="c_punctuation">()</span>
</td>
</tr>
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<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="p11-kit-Utilities.html#p11-kit-be-loud" title="p11_kit_be_loud ()">p11_kit_be_loud</a> <span class="c_punctuation">()</span>
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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>
</div>
<div class="refsect1">
<a name="p11-kit-Utilities.functions_details"></a><h2>Functions</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><span class="type">CK_RV</span> 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>
<div class="refsect3">
<a name="p11-kit-strerror.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" 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>rv</p></td>
<td class="parameter_description"><p>The code to get a message for.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="p11-kit-strerror.returns"></a><h4>Returns</h4>
<p> The user readable and localized message.</p>
</div>
</div>
<hr>
<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>
<div class="refsect3">
<a name="p11-kit-message.returns"></a><h4>Returns</h4>
<p> The last failure message, or <code class="literal">NULL</code>.</p>
</div>
</div>
<hr>
<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>
<div class="informalexample">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
2
3
4</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="n">CK_INFO</span><span class="w"> </span><span class="n">info</span><span class="p">;</span>
<span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">description</span><span class="p">;</span>
<span class="w"> </span><span class="p">...</span>
<span class="n">description</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">p11_kit_space_strdup</span><span class="w"> </span><span class="p">(</span><span class="n">info</span><span class="o">-></span><span class="n">libraryDescription</span><span class="p">,</span><span class="w"> </span><span class="k">sizeof</span><span class="w"> </span><span class="p">(</span><span class="n">info</span><span class="o">-></span><span class="n">libraryDescription</span><span class="p">));</span></pre></td>
</tr>
</tbody>
</table>
</div>
<div class="refsect3">
<a name="p11-kit-space-strdup.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" 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>string</p></td>
<td class="parameter_description"><p>Pointer to string block</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>max_length</p></td>
<td class="parameter_description"><p>Maximum length of string block</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="p11-kit-space-strdup.returns"></a><h4>Returns</h4>
<p> The newly allocated string, or <code class="literal">NULL</code> if memory could not be allocated.</p>
</div>
</div>
<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>
<div class="informalexample">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
2
3
4</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="n">CK_INFO</span><span class="w"> </span><span class="n">info</span><span class="p">;</span>
<span class="kt">size_t</span><span class="w"> </span><span class="n">length</span><span class="p">;</span>
<span class="w"> </span><span class="p">...</span>
<span class="n">length</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">p11_kit_space_strlen</span><span class="w"> </span><span class="p">(</span><span class="n">info</span><span class="o">-></span><span class="n">libraryDescription</span><span class="p">,</span><span class="w"> </span><span class="k">sizeof</span><span class="w"> </span><span class="p">(</span><span class="n">info</span><span class="o">-></span><span class="n">libraryDescription</span><span class="p">));</span></pre></td>
</tr>
</tbody>
</table>
</div>
<div class="refsect3">
<a name="p11-kit-space-strlen.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" 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>string</p></td>
<td class="parameter_description"><p>Pointer to string block</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>max_length</p></td>
<td class="parameter_description"><p>Maximum length of string block</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="p11-kit-space-strlen.returns"></a><h4>Returns</h4>
<p> The length of the space padded string.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="p11-kit-be-quiet"></a><h3>p11_kit_be_quiet ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
p11_kit_be_quiet (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Once this function is called, the p11-kit library will no longer print
failure or warning messages to stderr.</p>
</div>
<hr>
<div class="refsect2">
<a name="p11-kit-be-loud"></a><h3>p11_kit_be_loud ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
p11_kit_be_loud (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Tell the p11-kit library will print failure or warning messages to stderr.
This is the default behavior, but can be changed using <a class="link" href="p11-kit-Utilities.html#p11-kit-be-quiet" title="p11_kit_be_quiet ()"><code class="function">p11_kit_be_quiet()</code></a>.</p>
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