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<li class="nav-item nav-item-this"><a href=""><span class="section-number">10. </span><code class="xref py py-mod docutils literal notranslate"><span class="pre">windows.com</span></code> - Component Object Model</a></li>
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<section id="module-windows.com">
<span id="windows-com-component-object-model"></span><h1><span class="section-number">10. </span><a class="reference internal" href="#module-windows.com" title="windows.com"><code class="xref py py-mod docutils literal notranslate"><span class="pre">windows.com</span></code></a> - Component Object Model<a class="headerlink" href="#module-windows.com" title="Link to this heading"></a></h1>
<p>A module to call <cite>COM</cite> interfaces from <cite>Python</cite> or
<cite>COM</cite> vtable in python.</p>
<p>This code is only used in <a class="reference internal" href="wmi.html#module-windows.winobject.wmi" title="windows.winobject.wmi"><code class="xref py py-mod docutils literal notranslate"><span class="pre">windows.winobject.wmi</span></code></a> and <a class="reference internal" href="network.html#module-windows.winobject.network" title="windows.winobject.network"><code class="xref py py-mod docutils literal notranslate"><span class="pre">windows.winobject.network</span></code></a> for the firewall.
The ability to create <cite>COM</cite> vtable is used in the <a class="reference external" href="https://github.com/sogeti-esec-lab/LKD/">LKD project</a> .</p>
<section id="using-a-com-interface">
<h2><span class="section-number">10.1. </span>Using a COM interface<a class="headerlink" href="#using-a-com-interface" title="Link to this heading"></a></h2>
<p>It’s possible to directly call <cite>COM</cite> interface from python. All you need is the definition of the <cite>COM</cite> interface.</p>
<p>There are three ways to get the definition of the code interface:</p>
<blockquote>
<div><ul class="simple">
<li><p>By using it from <a class="reference internal" href="interfaces_generated.html#module-windows.generated_def.interfaces" title="windows.generated_def.interfaces"><code class="xref py py-mod docutils literal notranslate"><span class="pre">windows.generated_def.interfaces</span></code></a></p></li>
<li><p>By writing it yourself : <a class="reference external" href="https://github.com/sogeti-esec-lab/LKD/blob/ba40727d7d257b00f89fc6ca7296c9833b7b75b2/dbginterface/remote.py#L56">https://github.com/sogeti-esec-lab/LKD/blob/ba40727d7d257b00f89fc6ca7296c9833b7b75b2/dbginterface/remote.py#L56</a></p></li>
<li><p>By generating it.</p></li>
</ul>
</div></blockquote>
<p>To generate a <cite>COM</cite> interface you need its definition from the “.c” file.
Then add thisit to <code class="docutils literal notranslate"><span class="pre">PythonForWindows\ctypes_generation\com\MyInterface.txt</span></code>.
Finally re-generate the interface using <code class="docutils literal notranslate"><span class="pre">generate.py</span></code>.</p>
<p>When you have the <cite>COM</cite> interface defintion you can create an instance of it.
Then you need to retrieve the interface by using an API returning an object or <code class="xref py py-func docutils literal notranslate"><span class="pre">window.com.create_instance()</span></code>.
You can then use the instance to call whatever method you need.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>see samples <a class="reference internal" href="sample.html#sample-com"><span class="std std-ref">windows.com</span></a></p>
</div>
</section>
<section id="implementing-a-com-interface">
<h2><span class="section-number">10.2. </span>Implementing a COM interface<a class="headerlink" href="#implementing-a-com-interface" title="Link to this heading"></a></h2>
<p>To create <cite>COM</cite> object you need to:</p>
<blockquote>
<div><ol class="arabic simple">
<li><p>Create your <code class="docutils literal notranslate"><span class="pre">COMImplementation</span></code> with an <code class="docutils literal notranslate"><span class="pre">IMPLEMENT</span></code> attribute that should be a cominterface <a class="reference external" href="https://github.com/sogeti-esec-lab/LKD/blob/efabf3cc38b94d4180ebe8d2c554da5d76b2fea1/lkd/dbginterface/base.py#L48">CODE 1</a></p></li>
<li><p>Implements the methods of the interface <a class="reference external" href="https://github.com/sogeti-esec-lab/LKD/blob/efabf3cc38b94d4180ebe8d2c554da5d76b2fea1/lkd/dbginterface/base.py#L55">CODE 2</a></p></li>
<li><p>Create an instance <a class="reference external" href="https://github.com/sogeti-esec-lab/LKD/blob/efabf3cc38b94d4180ebe8d2c554da5d76b2fea1/lkd/dbginterface/base.py#L59">CODE3</a></p></li>
<li><p>Pass it to whatever native function expects it <a class="reference external" href="https://github.com/sogeti-esec-lab/LKD/blob/efabf3cc38b94d4180ebe8d2c554da5d76b2fea1/lkd/dbginterface/base.py#L272">CODE4</a></p></li>
</ol>
</div></blockquote>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>see samples <a class="reference internal" href="sample.html#sample-com-icallinterceptor"><span class="std std-ref">ICallInterceptor</span></a></p>
</div>
</section>
<section id="api">
<h2><span class="section-number">10.3. </span>API<a class="headerlink" href="#api" title="Link to this heading"></a></h2>
<dl class="py function">
<dt class="sig sig-object py" id="windows.com.init">
<span class="sig-prename descclassname"><span class="pre">windows.com.</span></span><span class="sig-name descname"><span class="pre">init</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/windows/com.html#init"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#windows.com.init" title="Link to this definition"></a></dt>
<dd><p>Init COM with some default parameters</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="windows.com.create_instance">
<span class="sig-prename descclassname"><span class="pre">windows.com.</span></span><span class="sig-name descname"><span class="pre">create_instance</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">clsiid</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">targetinterface</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">custom_iid</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">context</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">5</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/windows/com.html#create_instance"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#windows.com.create_instance" title="Link to this definition"></a></dt>
<dd><p>A simple wrapper around <code class="docutils literal notranslate"><span class="pre">CoCreateInstance</span> <span class="pre">&lt;https://msdn.microsoft.com/en-us/library/windows/desktop/ms686615(v=vs.85).aspx&gt;</span></code></p>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="windows.com.COMImplementation">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">windows.com.</span></span><span class="sig-name descname"><span class="pre">COMImplementation</span></span><a class="reference internal" href="_modules/windows/com.html#COMImplementation"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#windows.com.COMImplementation" title="Link to this definition"></a></dt>
<dd><p>The base class to implements COM object respecting a given interface</p>
<dl class="py method">
<dt class="sig sig-object py" id="windows.com.COMImplementation.AddRef">
<span class="sig-name descname"><span class="pre">AddRef</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">args</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/windows/com.html#COMImplementation.AddRef"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#windows.com.COMImplementation.AddRef" title="Link to this definition"></a></dt>
<dd><p>Default <code class="docutils literal notranslate"><span class="pre">AddRef</span></code> implementation that returns <code class="docutils literal notranslate"><span class="pre">1</span></code></p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="windows.com.COMImplementation.QueryInterface">
<span class="sig-name descname"><span class="pre">QueryInterface</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">this</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">piid</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">result</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/windows/com.html#COMImplementation.QueryInterface"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#windows.com.COMImplementation.QueryInterface" title="Link to this definition"></a></dt>
<dd><p>Default <code class="docutils literal notranslate"><span class="pre">QueryInterface</span></code> implementation that returns <code class="docutils literal notranslate"><span class="pre">self</span></code> if piid is the implemented interface</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="windows.com.COMImplementation.Release">
<span class="sig-name descname"><span class="pre">Release</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">args</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/windows/com.html#COMImplementation.Release"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#windows.com.COMImplementation.Release" title="Link to this definition"></a></dt>
<dd><p>Default <code class="docutils literal notranslate"><span class="pre">Release</span></code> implementation that returns <code class="docutils literal notranslate"><span class="pre">1</span></code></p>
</dd></dl>
</dd></dl>
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<h3><a href="index.html">Table of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">10. <code class="xref py py-mod docutils literal notranslate"><span class="pre">windows.com</span></code> - Component Object Model</a><ul>
<li><a class="reference internal" href="#using-a-com-interface">10.1. Using a COM interface</a></li>
<li><a class="reference internal" href="#implementing-a-com-interface">10.2. Implementing a COM interface</a></li>
<li><a class="reference internal" href="#api">10.3. API</a><ul>
<li><a class="reference internal" href="#windows.com.init"><code class="docutils literal notranslate"><span class="pre">init()</span></code></a></li>
<li><a class="reference internal" href="#windows.com.create_instance"><code class="docutils literal notranslate"><span class="pre">create_instance()</span></code></a></li>
<li><a class="reference internal" href="#windows.com.COMImplementation"><code class="docutils literal notranslate"><span class="pre">COMImplementation</span></code></a><ul>
<li><a class="reference internal" href="#windows.com.COMImplementation.AddRef"><code class="docutils literal notranslate"><span class="pre">AddRef()</span></code></a></li>
<li><a class="reference internal" href="#windows.com.COMImplementation.QueryInterface"><code class="docutils literal notranslate"><span class="pre">QueryInterface()</span></code></a></li>
<li><a class="reference internal" href="#windows.com.COMImplementation.Release"><code class="docutils literal notranslate"><span class="pre">Release()</span></code></a></li>
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<p class="topless"><a href="debug.html"
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title="next chapter"><span class="section-number">11. </span><code class="docutils literal notranslate"><span class="pre">windows.crypto</span></code> – CryptoAPI</a></p>
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