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Code Editor : p11-kit-PIN-Callbacks.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>PIN Callbacks: p11-kit</title> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <link rel="home" href="index.html" title="p11-kit"> <link rel="up" href="reference.html" title="API Reference"> <link rel="prev" href="p11-kit-URIs.html" title="URIs"> <link rel="next" href="p11-kit-Utilities.html" title="Utilities"> <meta name="generator" content="GTK-Doc V1.33.1 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"> <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> <a href="#p11-kit-PIN-Callbacks.description" class="shortcut">Description</a></span> </td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="reference.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="p11-kit-URIs.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="p11-kit-Utilities.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="p11-kit-PIN-Callbacks"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="p11-kit-PIN-Callbacks.top_of_page"></a>PIN Callbacks</span></h2> <p>PIN Callbacks — PIN Callbacks</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="p11-kit-PIN-Callbacks.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"> </colgroup> <tbody> <tr> <td class="function_type"> <a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-new" title="p11_kit_pin_new ()">p11_kit_pin_new</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-new-for-buffer" title="p11_kit_pin_new_for_buffer ()">p11_kit_pin_new_for_buffer</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-new-for-string" title="p11_kit_pin_new_for_string ()">p11_kit_pin_new_for_string</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">const unsigned <span class="returnvalue">char</span> * </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-get-value" title="p11_kit_pin_get_value ()">p11_kit_pin_get_value</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">size_t</span> </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-get-length" title="p11_kit_pin_get_length ()">p11_kit_pin_get_length</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-ref" title="p11_kit_pin_ref ()">p11_kit_pin_ref</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">void</span> </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-unref" title="p11_kit_pin_unref ()">p11_kit_pin_unref</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-register-callback" title="p11_kit_pin_register_callback ()">p11_kit_pin_register_callback</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">void</span> </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-unregister-callback" title="p11_kit_pin_unregister_callback ()">p11_kit_pin_unregister_callback</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * </td> <td class="function_name"> <span class="c_punctuation">(</span><a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-callback" title="p11_kit_pin_callback ()">*p11_kit_pin_callback</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-request" title="p11_kit_pin_request ()">p11_kit_pin_request</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">void</span> </td> <td class="function_name"> <span class="c_punctuation">(</span><a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-destroy-func" title="p11_kit_pin_destroy_func ()">*p11_kit_pin_destroy_func</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * </td> <td class="function_name"> <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-file-callback" title="p11_kit_pin_file_callback ()">p11_kit_pin_file_callback</a> <span class="c_punctuation">()</span> </td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="p11-kit-PIN-Callbacks.other"></a><h2>Types and Values</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="other_proto_type"> <col class="other_proto_name"> </colgroup> <tbody> <tr> <td class="typedef_keyword">typedef</td> <td class="function_name"><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin">P11KitPin</a></td> </tr> <tr> <td class="datatype_keyword">enum</td> <td class="function_name"><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPinFlags" title="enum P11KitPinFlags">P11KitPinFlags</a></td> </tr> <tr> <td class="define_keyword">#define</td> <td class="function_name"><a class="link" href="p11-kit-PIN-Callbacks.html#P11-KIT-PIN-FALLBACK:CAPS" title="P11_KIT_PIN_FALLBACK">P11_KIT_PIN_FALLBACK</a></td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="p11-kit-PIN-Callbacks.description"></a><h2>Description</h2> <p>Applications can register a callback which will be called to provide a password associated with a given pin source.</p> <p>PKCS#11 URIs can contain a 'pin-source' attribute. The value of this attribute is application dependent, but often references a file containing a PIN to use.</p> <p>Using these functions, an applications or libraries can register a callback with <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-register-callback" title="p11_kit_pin_register_callback ()"><code class="function">p11_kit_pin_register_callback()</code></a> to be called when a given 'pin-source' attribute value is requested. The application can then prompt the user or retrieve a PIN for the given context. These registered callbacks are only relevant and valid within the current process.</p> <p>A fallback callback can be registered by passing the <a class="link" href="p11-kit-PIN-Callbacks.html#P11-KIT-PIN-FALLBACK:CAPS" title="P11_KIT_PIN_FALLBACK"><code class="literal">P11_KIT_PIN_FALLBACK</code></a> value to <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-register-callback" title="p11_kit_pin_register_callback ()"><code class="function">p11_kit_pin_register_callback()</code></a>. This fallback callback will be called for every 'pin-source' attribute request for which no callback has been directly registered.</p> <p>To request a PIN for a given 'pin-source' attribute, use the <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-request" title="p11_kit_pin_request ()"><code class="function">p11_kit_pin_request()</code></a> function. If this function returns <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> then either no callbacks were registered or none of them could handle the request.</p> <p>If multiple callbacks are registered for the same PIN source, then they are called in last-registered-first-called order. They are called in turn until one of them can handle the request. Fallback callbacks are not called if a callback was registered specifically for a requested 'pin-source' attribute.</p> <p>PINs themselves are handled inside of P11KitPin structures. These are thread safe and allow the callback to specify how the PIN is stored in memory and freed. A callback can use <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-new-for-string" title="p11_kit_pin_new_for_string ()"><code class="function">p11_kit_pin_new_for_string()</code></a> or related functions to create a PIN to be returned.</p> <p>For example in order to handle the following PKCS#11 URI with a 'pin-source' attribute</p> <code class="code"><div class="literallayout"><p><br> pkcs11:id=\%69\%95\%3e\%5c\%f4\%bd\%ec\%91;pin-source=my-application<br> </p></div></code><p>an application could register a callback like this:</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 5 6 7 8 9 10</pre></td> <td class="listing_code"><pre class="programlisting"><span class="k">static</span> <span class="n">P11KitPin</span><span class="o">*</span> <span class="n">my_application_pin_callback</span> <span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">pin_source</span><span class="p">,</span> <span class="n">P11KitUri</span> <span class="o">*</span><span class="n">pin_uri</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">pin_description</span><span class="p">,</span> <span class="n">P11KitPinFlags</span> <span class="n">pin_flags</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">callback_data</span><span class="p">)</span> <span class="p">{</span> <span class="k">return</span> <span class="nf">p11_kit_pin_new_from_string</span> <span class="p">(</span><span class="s">"pin-value"</span><span class="p">);</span> <span class="p">}</span> <span class="n">p11_kit_pin_register_callback</span> <span class="p">(</span><span class="s">"my-application"</span><span class="p">,</span> <span class="n">my_application_pin_callback</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span></pre></td> </tr> </tbody> </table> </div> </div> <div class="refsect1"> <a name="p11-kit-PIN-Callbacks.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="p11-kit-pin-new"></a><h3>p11_kit_pin_new ()</h3> <pre class="programlisting"><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * p11_kit_pin_new (<em class="parameter"><code>const unsigned <span class="type">char</span> *value</code></em>, <em class="parameter"><code><span class="type">size_t</span> length</code></em>);</pre> <p>Create a new P11KitPin with the given PIN value. This function is usually used from within registered PIN callbacks.</p> <p>Exactly <em class="parameter"><code>length</code></em> bytes from <em class="parameter"><code>value</code></em> are used. Null terminated strings, or encodings are not considered. A copy of the <em class="parameter"><code>value</code></em> will be made.</p> <div class="refsect3"> <a name="p11-kit-pin-new.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>value</p></td> <td class="parameter_description"><p>the value of the PIN</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>length</p></td> <td class="parameter_description"><p>the length of <em class="parameter"><code>value</code></em> </p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-new.returns"></a><h4>Returns</h4> <p> The newly allocated P11KitPin, which should be freed with <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-unref" title="p11_kit_pin_unref ()"><code class="function">p11_kit_pin_unref()</code></a> when no longer needed.</p> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-new-for-buffer"></a><h3>p11_kit_pin_new_for_buffer ()</h3> <pre class="programlisting"><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * p11_kit_pin_new_for_buffer (<em class="parameter"><code>unsigned <span class="type">char</span> *buffer</code></em>, <em class="parameter"><code><span class="type">size_t</span> length</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-destroy-func" title="p11_kit_pin_destroy_func ()"><span class="type">p11_kit_pin_destroy_func</span></a> destroy</code></em>);</pre> <p>Create a new P11KitPin which will use <em class="parameter"><code>buffer</code></em> for the PIN value. This function is usually used from within registered PIN callbacks.</p> <p>The buffer will not be copied. String encodings and null characters are not considered.</p> <p>When the last reference to this PIN is lost, then the <em class="parameter"><code>destroy</code></em> callback function will be called passing <em class="parameter"><code>buffer</code></em> as an argument. This allows the caller to use a buffer as a PIN without copying it.</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="kt">char</span> <span class="o">*</span><span class="n">buffer</span> <span class="o">=</span> <span class="n">malloc</span> <span class="p">(</span><span class="mi">128</span><span class="p">);</span> <span class="n">P11KitPin</span> <span class="o">*</span><span class="n">pin</span><span class="p">;</span> <span class="p">....</span> <span class="n">pin</span> <span class="o">=</span> <span class="n">p11_kit_pin_new_for_buffer</span> <span class="p">(</span><span class="n">buffer</span><span class="p">,</span> <span class="mi">128</span><span class="p">,</span> <span class="n">free</span><span class="p">);</span></pre></td> </tr> </tbody> </table> </div> <div class="refsect3"> <a name="p11-kit-pin-new-for-buffer.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>buffer</p></td> <td class="parameter_description"><p>the value of the PIN</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>length</p></td> <td class="parameter_description"><p>the length of <em class="parameter"><code>buffer</code></em> </p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>destroy</p></td> <td class="parameter_description"><p>if not <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, then called when PIN is destroyed.</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-new-for-buffer.returns"></a><h4>Returns</h4> <p> The newly allocated P11KitPin, which should be freed with <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-unref" title="p11_kit_pin_unref ()"><code class="function">p11_kit_pin_unref()</code></a> when no longer needed.</p> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-new-for-string"></a><h3>p11_kit_pin_new_for_string ()</h3> <pre class="programlisting"><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * p11_kit_pin_new_for_string (<em class="parameter"><code>const <span class="type">char</span> *value</code></em>);</pre> <p>Create a new P11KitPin for the given null-terminated string, such as a password. This function is usually used from within registered PIN callbacks.</p> <p>The PIN will consist of the string not including the null terminator. String encoding is not considered. A copy of the <em class="parameter"><code>value</code></em> will be made.</p> <div class="refsect3"> <a name="p11-kit-pin-new-for-string.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>value</p></td> <td class="parameter_description"><p>the value of the PIN</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-new-for-string.returns"></a><h4>Returns</h4> <p> The newly allocated P11KitPin, which should be freed with <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-unref" title="p11_kit_pin_unref ()"><code class="function">p11_kit_pin_unref()</code></a> when no longer needed.</p> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-get-value"></a><h3>p11_kit_pin_get_value ()</h3> <pre class="programlisting">const unsigned <span class="returnvalue">char</span> * p11_kit_pin_get_value (<em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="type">P11KitPin</span></a> *pin</code></em>, <em class="parameter"><code><span class="type">size_t</span> *length</code></em>);</pre> <p>Get the PIN value from a P11KitPin. <em class="parameter"><code>length</code></em> will be set to the length of the value.</p> <p>The value returned is owned by the P11KitPin and should not be modified. It remains valid as long as a reference to the PIN is held. The PIN value will not contain an extra null-terminator character.</p> <div class="refsect3"> <a name="p11-kit-pin-get-value.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>pin</p></td> <td class="parameter_description"><p>the P11KitPin</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>length</p></td> <td class="parameter_description"><p>a location to return the value length</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-get-value.returns"></a><h4>Returns</h4> <p> the value for the PIN.</p> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-get-length"></a><h3>p11_kit_pin_get_length ()</h3> <pre class="programlisting"><span class="returnvalue">size_t</span> p11_kit_pin_get_length (<em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="type">P11KitPin</span></a> *pin</code></em>);</pre> <p>Get the length of the PIN value from a P11KitPin.</p> <div class="refsect3"> <a name="p11-kit-pin-get-length.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>pin</p></td> <td class="parameter_description"><p>the P11KitPin</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-get-length.returns"></a><h4>Returns</h4> <p> the length of the PIN value.</p> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-ref"></a><h3>p11_kit_pin_ref ()</h3> <pre class="programlisting"><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * p11_kit_pin_ref (<em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="type">P11KitPin</span></a> *pin</code></em>);</pre> <p>Add a reference to a P11KitPin. This should be matched with a later call to <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-unref" title="p11_kit_pin_unref ()"><code class="function">p11_kit_pin_unref()</code></a>. As long as at least one reference is held, the PIN will remain valid and in memory.</p> <div class="refsect3"> <a name="p11-kit-pin-ref.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>pin</p></td> <td class="parameter_description"><p>the P11KitPin</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-ref.returns"></a><h4>Returns</h4> <p> the <em class="parameter"><code>pin</code></em> pointer, for convenience sake.</p> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-unref"></a><h3>p11_kit_pin_unref ()</h3> <pre class="programlisting"><span class="returnvalue">void</span> p11_kit_pin_unref (<em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="type">P11KitPin</span></a> *pin</code></em>);</pre> <p>Remove a reference from a P11KitPin. When all references have been removed then the PIN will be freed and will no longer be in memory.</p> <div class="refsect3"> <a name="p11-kit-pin-unref.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>pin</p></td> <td class="parameter_description"><p>the P11KitPin</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-register-callback"></a><h3>p11_kit_pin_register_callback ()</h3> <pre class="programlisting"><span class="returnvalue">int</span> p11_kit_pin_register_callback (<em class="parameter"><code>const <span class="type">char</span> *pin_source</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-callback" title="p11_kit_pin_callback ()"><span class="type">p11_kit_pin_callback</span></a> callback</code></em>, <em class="parameter"><code><span class="type">void</span> *callback_data</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-destroy-func" title="p11_kit_pin_destroy_func ()"><span class="type">p11_kit_pin_destroy_func</span></a> callback_destroy</code></em>);</pre> <p>Register a callback to handle PIN requests for a given 'pin-source' attribute. If <em class="parameter"><code>pin_source</code></em> is set to P11_KIT_PIN_FALLBACK then this will be a fallback callback and will be called for requests for which no other callback has been specifically registered.</p> <p>If multiple callbacks are registered for the same <em class="parameter"><code>pin_source</code></em> value, then the last registered callback will be the first to be called.</p> <div class="refsect3"> <a name="p11-kit-pin-register-callback.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>pin_source</p></td> <td class="parameter_description"><p>the 'pin-source' attribute this this callback is for</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>callback</p></td> <td class="parameter_description"><p>the callback function</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>callback_data</p></td> <td class="parameter_description"><p>data that will be passed to the callback</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>callback_destroy</p></td> <td class="parameter_description"><p>a function that will be called with <em class="parameter"><code>callback_data</code></em> when the callback is unregistered.</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-register-callback.returns"></a><h4>Returns</h4> <p> Returns negative if registering fails.</p> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-unregister-callback"></a><h3>p11_kit_pin_unregister_callback ()</h3> <pre class="programlisting"><span class="returnvalue">void</span> p11_kit_pin_unregister_callback (<em class="parameter"><code>const <span class="type">char</span> *pin_source</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-callback" title="p11_kit_pin_callback ()"><span class="type">p11_kit_pin_callback</span></a> callback</code></em>, <em class="parameter"><code><span class="type">void</span> *callback_data</code></em>);</pre> <p>Unregister a callback that was previously registered with the <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-register-callback" title="p11_kit_pin_register_callback ()"><code class="function">p11_kit_pin_register_callback()</code></a> function. If more than one registered callback matches the given arguments, then only one of those will be removed.</p> <div class="refsect3"> <a name="p11-kit-pin-unregister-callback.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>pin_source</p></td> <td class="parameter_description"><p>the 'pin-source' attribute the callback was registered for</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>callback</p></td> <td class="parameter_description"><p>the callback function that was registered</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>callback_data</p></td> <td class="parameter_description"><p>data that was registered for the callback</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-callback"></a><h3>p11_kit_pin_callback ()</h3> <pre class="programlisting"><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * <span class="c_punctuation">(</span>*p11_kit_pin_callback<span class="c_punctuation">)</span> (<em class="parameter"><code>const <span class="type">char</span> *pin_source</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-URIs.html#P11KitUri" title="P11KitUri"><span class="type">P11KitUri</span></a> *pin_uri</code></em>, <em class="parameter"><code>const <span class="type">char</span> *pin_description</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPinFlags" title="enum P11KitPinFlags"><span class="type">P11KitPinFlags</span></a> pin_flags</code></em>, <em class="parameter"><code><span class="type">void</span> *callback_data</code></em>);</pre> <p>Represents a PIN callback function.</p> <p>The various arguments are the same as the ones passed to <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-request" title="p11_kit_pin_request ()"><code class="function">p11_kit_pin_request()</code></a>. The <em class="parameter"><code>callback_data</code></em> argument was the one passed to <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-register-callback" title="p11_kit_pin_register_callback ()"><code class="function">p11_kit_pin_register_callback()</code></a> when registering this callback.</p> <p>The function should return <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if it could not provide a PIN, either because of an error or a user cancellation.</p> <p>If a PIN is returned, it will be unreferenced by the caller. So it should be either newly allocated, or referenced before returning.</p> <div class="refsect3"> <a name="p11-kit-pin-callback.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>pin_source</p></td> <td class="parameter_description"><p>a 'pin-source' attribute string</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pin_uri</p></td> <td class="parameter_description"><p>a PKCS#11 URI that the PIN is for, or <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pin_description</p></td> <td class="parameter_description"><p>a descrption of what the PIN is for</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pin_flags</p></td> <td class="parameter_description"><p>flags describing the PIN request</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>callback_data</p></td> <td class="parameter_description"><p>data that was provided when registering this callback</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-callback.returns"></a><h4>Returns</h4> <p> A PIN or <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-request"></a><h3>p11_kit_pin_request ()</h3> <pre class="programlisting"><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * p11_kit_pin_request (<em class="parameter"><code>const <span class="type">char</span> *pin_source</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-URIs.html#P11KitUri" title="P11KitUri"><span class="type">P11KitUri</span></a> *pin_uri</code></em>, <em class="parameter"><code>const <span class="type">char</span> *pin_description</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPinFlags" title="enum P11KitPinFlags"><span class="type">P11KitPinFlags</span></a> pin_flags</code></em>);</pre> <p>Request a PIN for a given 'pin-source' attribute. The result depends on the registered callbacks.</p> <p>If not <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, then the <em class="parameter"><code>pin_uri</code></em> attribute should point to the thing that the PIN is being requested for. In most use cases this should be a PKCS#11 URI pointing to a token.</p> <p>The <em class="parameter"><code>pin_description</code></em> should always be specified. It is a string describing what the PIN is for. For example this would be the token label, if the PIN is for a token.</p> <p>If more than one callback is registered for the <em class="parameter"><code>pin_source</code></em> , then the latest registered one will be called first. If that callback does not return a PIN, then the next will be called in turn.</p> <p>If no callback is registered for <em class="parameter"><code>pin_source</code></em> , then the fallback callbacks will be invoked in the same way. The fallback callbacks will not be called if any callback has been registered specifically for <em class="parameter"><code>pin_source</code></em> .</p> <p>The PIN returned should be released with <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-unref" title="p11_kit_pin_unref ()"><code class="function">p11_kit_pin_unref()</code></a>.</p> <div class="refsect3"> <a name="p11-kit-pin-request.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>pin_source</p></td> <td class="parameter_description"><p>the 'pin-source' attribute that is being requested</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pin_uri</p></td> <td class="parameter_description"><p>a PKCS#11 URI that the PIN is being requested for, optionally <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pin_description</p></td> <td class="parameter_description"><p>a description of what the PIN is for, must not be <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pin_flags</p></td> <td class="parameter_description"><p>various flags for this request</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-request.returns"></a><h4>Returns</h4> <p> the PIN which should be released with <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-unref" title="p11_kit_pin_unref ()"><code class="function">p11_kit_pin_unref()</code></a>, or <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if no callback was registered or could proivde a PIN</p> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-destroy-func"></a><h3>p11_kit_pin_destroy_func ()</h3> <pre class="programlisting"><span class="returnvalue">void</span> <span class="c_punctuation">(</span>*p11_kit_pin_destroy_func<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">void</span> *data</code></em>);</pre> <p>A function called to free or cleanup <em class="parameter"><code>data</code></em> .</p> <div class="refsect3"> <a name="p11-kit-pin-destroy-func.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>data</p></td> <td class="parameter_description"><p>the data to destroy</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> </div> <hr> <div class="refsect2"> <a name="p11-kit-pin-file-callback"></a><h3>p11_kit_pin_file_callback ()</h3> <pre class="programlisting"><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPin" title="P11KitPin"><span class="returnvalue">P11KitPin</span></a> * p11_kit_pin_file_callback (<em class="parameter"><code>const <span class="type">char</span> *pin_source</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-URIs.html#P11KitUri" title="P11KitUri"><span class="type">P11KitUri</span></a> *pin_uri</code></em>, <em class="parameter"><code>const <span class="type">char</span> *pin_description</code></em>, <em class="parameter"><code><a class="link" href="p11-kit-PIN-Callbacks.html#P11KitPinFlags" title="enum P11KitPinFlags"><span class="type">P11KitPinFlags</span></a> pin_flags</code></em>, <em class="parameter"><code><span class="type">void</span> *callback_data</code></em>);</pre> <p>This is a PIN callback function that looks up the 'pin-source' attribute in a file with that name. This can be used to enable the normal PKCS#11 URI behavior described in the RFC.</p> <p>If <em class="parameter"><code>pin_flags</code></em> contains the <a class="link" href="p11-kit-PIN-Callbacks.html#P11-KIT-PIN-FLAGS-RETRY:CAPS"><code class="literal">P11_KIT_PIN_FLAGS_RETRY</code></a> flag, then this callback will always return <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. This is to prevent endless loops where an application is expecting to interact with a prompter, but instead is interacting with this callback reading a file over and over.</p> <p>This callback fails on files larger than 4 Kilobytes.</p> <p>This callback is not registered by default. It may have security implications depending on the source of the PKCS#11 URI and the PKCS#11 in use. To register it, use code like the following:</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</pre></td> <td class="listing_code"><pre class="programlisting"><span class="n">p11_kit_pin_register_callback</span> <span class="p">(</span><span class="n">P11_KIT_PIN_FALLBACK</span><span class="p">,</span> <span class="n">p11_kit_pin_file_callback</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span></pre></td> </tr> </tbody> </table> </div> <div class="refsect3"> <a name="p11-kit-pin-file-callback.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>pin_source</p></td> <td class="parameter_description"><p>a 'pin-source' attribute string</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pin_uri</p></td> <td class="parameter_description"><p>a PKCS#11 URI that the PIN is for, or <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pin_description</p></td> <td class="parameter_description"><p>a descrption of what the PIN is for</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>pin_flags</p></td> <td class="parameter_description"><p>flags describing the PIN request</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>callback_data</p></td> <td class="parameter_description"><p>unused, should be <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="p11-kit-pin-file-callback.returns"></a><h4>Returns</h4> <p> a referenced PIN with the file contents, or <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the file could not be read</p> </div> </div> </div> <div class="refsect1"> <a name="p11-kit-PIN-Callbacks.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="P11KitPin"></a><h3>P11KitPin</h3> <p>A structure representing a PKCS#11 PIN. There are no public fields visible in this structure. Use the various accessor functions.</p> </div> <hr> <div class="refsect2"> <a name="P11KitPinFlags"></a><h3>enum P11KitPinFlags</h3> <p>Flags that are passed to <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-request" title="p11_kit_pin_request ()"><code class="function">p11_kit_pin_request()</code></a> and registered callbacks.</p> <div class="refsect3"> <a name="P11KitPinFlags.members"></a><h4>Members</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="300px" class="enum_members_name"> <col class="enum_members_description"> <col width="200px" class="enum_members_annotations"> </colgroup> <tbody> <tr> <td class="enum_member_name"><p><a name="P11-KIT-PIN-FLAGS-USER-LOGIN:CAPS"></a>P11_KIT_PIN_FLAGS_USER_LOGIN</p></td> <td class="enum_member_description"> <p>The PIN is for a PKCS#11 user type login.</p> </td> <td class="enum_member_annotations"> </td> </tr> <tr> <td class="enum_member_name"><p><a name="P11-KIT-PIN-FLAGS-SO-LOGIN:CAPS"></a>P11_KIT_PIN_FLAGS_SO_LOGIN</p></td> <td class="enum_member_description"> <p>The PIN is for a PKCS#11 security officer type login.</p> </td> <td class="enum_member_annotations"> </td> </tr> <tr> <td class="enum_member_name"><p><a name="P11-KIT-PIN-FLAGS-CONTEXT-LOGIN:CAPS"></a>P11_KIT_PIN_FLAGS_CONTEXT_LOGIN</p></td> <td class="enum_member_description"> <p>The PIN is for a PKCS#11 contect specific type login.</p> </td> <td class="enum_member_annotations"> </td> </tr> <tr> <td class="enum_member_name"><p><a name="P11-KIT-PIN-FLAGS-RETRY:CAPS"></a>P11_KIT_PIN_FLAGS_RETRY</p></td> <td class="enum_member_description"> <p>The PIN is being requested again, due to an invalid previous PIN.</p> </td> <td class="enum_member_annotations"> </td> </tr> <tr> <td class="enum_member_name"><p><a name="P11-KIT-PIN-FLAGS-MANY-TRIES:CAPS"></a>P11_KIT_PIN_FLAGS_MANY_TRIES</p></td> <td class="enum_member_description"> <p>The PIN has failed too many times, and few tries are left.</p> </td> <td class="enum_member_annotations"> </td> </tr> <tr> <td class="enum_member_name"><p><a name="P11-KIT-PIN-FLAGS-FINAL-TRY:CAPS"></a>P11_KIT_PIN_FLAGS_FINAL_TRY</p></td> <td class="enum_member_description"> <p>The PIN has failed too many times, and this is the last try.</p> </td> <td class="enum_member_annotations"> </td> </tr> </tbody> </table></div> </div> </div> <hr> <div class="refsect2"> <a name="P11-KIT-PIN-FALLBACK:CAPS"></a><h3>P11_KIT_PIN_FALLBACK</h3> <pre class="programlisting">#define P11_KIT_PIN_FALLBACK</pre> <p>Used with <a class="link" href="p11-kit-PIN-Callbacks.html#p11-kit-pin-register-callback" title="p11_kit_pin_register_callback ()"><code class="function">p11_kit_pin_register_callback()</code></a> to register a fallback callback. This callback will be called if no other callback is registered for a 'pin-source'.</p> </div> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.33.1</div> </body> </html>
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