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simpliFiRE.IDAscope / documentation / epydoc / IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html

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<?xml version="1.0" encoding="ascii"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
          "DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
  <title>IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier</title>
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<body bgcolor="white" text="black" link="blue" vlink="#204080"
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        <a href="IDAscope-module.html">Package&nbsp;IDAscope</a> ::
        <a href="IDAscope.idascope-module.html">Package&nbsp;idascope</a> ::
        <a href="IDAscope.idascope.core-module.html">Package&nbsp;core</a> ::
        <a href="IDAscope.idascope.core.CryptoIdentifier-module.html">Module&nbsp;CryptoIdentifier</a> ::
        Class&nbsp;CryptoIdentifier
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      <table cellpadding="0" cellspacing="0">
        <!-- hide/show private -->
        <tr><td align="right"><span class="options">[<a href="javascript:void(0);" class="privatelink"
    onclick="toggle_private();">hide&nbsp;private</a>]</span></td></tr>
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class CryptoIdentifier</h1><p class="nomargin-top"><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier">source&nbsp;code</a></span></p>
<pre class="literalblock">

This class contains the logic to perform Crypto identification.
Two techniques are currently supported:
1. A heuristic approach that identifies functions and basic blocks
based on the ratio of arithmetic/logic instructions to all instructions
2. A signature-based approach, using the signatures defined in PatternManager

</pre>

<!-- ==================== INSTANCE METHODS ==================== -->
<a name="section-InstanceMethods"></a>
<table class="summary" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
  <td colspan="2" class="table-header">
    <table border="0" cellpadding="0" cellspacing="0" width="100%">
      <tr valign="top">
        <td align="left"><span class="table-header">Instance Methods</span></td>
        <td align="right" valign="top"
         ><span class="options">[<a href="#section-InstanceMethods"
         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
      </tr>
    </table>
  </td>
</tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="__init__"></a><span class="summary-sig-name">__init__</span>(<span class="summary-sig-arg">self</span>)</span></td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.__init__">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="scan"></a><span class="summary-sig-name">scan</span>(<span class="summary-sig-arg">self</span>)</span><br />
      Scan the whole IDB with all available techniques.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.scan">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html#scan_aritlog" class="summary-sig-name">scan_aritlog</a>(<span class="summary-sig-arg">self</span>)</span><br />
      scan with the arithmetic/logic heuristic</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.scan_aritlog">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html#update_thresholds" class="summary-sig-name">update_thresholds</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">min_rating</span>,
        <span class="summary-sig-arg">max_rating</span>,
        <span class="summary-sig-arg">min_instr</span>,
        <span class="summary-sig-arg">max_instr</span>,
        <span class="summary-sig-arg">min_call</span>,
        <span class="summary-sig-arg">max_call</span>)</span><br />
      update all six threshold bounds</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.update_thresholds">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html#get_aritlog_blocks" class="summary-sig-name">get_aritlog_blocks</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">min_rating</span>,
        <span class="summary-sig-arg">max_rating</span>,
        <span class="summary-sig-arg">min_instr</span>,
        <span class="summary-sig-arg">max_instr</span>,
        <span class="summary-sig-arg">min_api</span>,
        <span class="summary-sig-arg">max_api</span>,
        <span class="summary-sig-arg">is_nonzero</span>)</span><br />
      get all blocks that are within the limits specified by the heuristic 
      parameters.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_aritlog_blocks">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html#get_unfiltered_block_count" class="summary-sig-name">get_unfiltered_block_count</a>(<span class="summary-sig-arg">self</span>)</span><br />
      returns the number of basic blocks that have been analyzed.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_unfiltered_block_count">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html#get_segment_data" class="summary-sig-name">get_segment_data</a>(<span class="summary-sig-arg">self</span>)</span><br />
      returns the raw bytes of the segments as stored by IDA</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_segment_data">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html#scan_crypto_patterns" class="summary-sig-name">scan_crypto_patterns</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">pattern_size</span>=<span class="summary-sig-default">32</span>)</span><br />
      perform a scan ofr signatures.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.scan_crypto_patterns">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html#get_signature_length" class="summary-sig-name">get_signature_length</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">signature_name</span>)</span><br />
      returns the length for a signature, identified by its name</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_signature_length">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html#get_xrefs_to_address" class="summary-sig-name">get_xrefs_to_address</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">address</span>)</span><br />
      get all references to a certain address.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_xrefs_to_address">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="IDAscope.idascope.core.CryptoIdentifier.CryptoIdentifier-class.html#get_signature_hits" class="summary-sig-name">get_signature_hits</a>(<span class="summary-sig-arg">self</span>)</span><br />
      Get all signature hits that have a length of at least 
      match_filter_factor percent of the signature they triggered.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_signature_hits">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
</table>
<!-- ==================== METHOD DETAILS ==================== -->
<a name="section-MethodDetails"></a>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
  <td colspan="2" class="table-header">
    <table border="0" cellpadding="0" cellspacing="0" width="100%">
      <tr valign="top">
        <td align="left"><span class="table-header">Method Details</span></td>
        <td align="right" valign="top"
         ><span class="options">[<a href="#section-MethodDetails"
         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
      </tr>
    </table>
  </td>
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</table>
<a name="scan_aritlog"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">scan_aritlog</span>(<span class="sig-arg">self</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.scan_aritlog">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>scan with the arithmetic/logic heuristic</p>
  <dl class="fields">
    <dt>Returns:</dt>
        <dd>a list of AritLogBasicBlock data objects that fulfill the 
          parameters as specified</dd>
  </dl>
</td></tr></table>
</div>
<a name="update_thresholds"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">update_thresholds</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">min_rating</span>,
        <span class="sig-arg">max_rating</span>,
        <span class="sig-arg">min_instr</span>,
        <span class="sig-arg">max_instr</span>,
        <span class="sig-arg">min_call</span>,
        <span class="sig-arg">max_call</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.update_thresholds">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>update all six threshold bounds</p>
  <dl class="fields">
    <dt>Parameters:</dt>
    <dd><ul class="nomargin-top">
        <li><strong class="pname"><code>min_rating</code></strong> (float) - the minimum arit/log ratio a basic block must have</li>
        <li><strong class="pname"><code>max_rating</code></strong> (float) - the maximum arit/log ratio a basic block can have</li>
        <li><strong class="pname"><code>min_instr</code></strong> (int) - the minimum number of instructions a basic block must have</li>
        <li><strong class="pname"><code>max_instr</code></strong> (int) - the minimum number of instructions a basic block can have</li>
        <li><strong class="pname"><code>min_call</code></strong> (int) - the minimum number of calls a basic block must have</li>
        <li><strong class="pname"><code>max_call</code></strong> (int) - the minimum number of calls a basic block can have</li>
    </ul></dd>
  </dl>
</td></tr></table>
</div>
<a name="get_aritlog_blocks"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">get_aritlog_blocks</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">min_rating</span>,
        <span class="sig-arg">max_rating</span>,
        <span class="sig-arg">min_instr</span>,
        <span class="sig-arg">max_instr</span>,
        <span class="sig-arg">min_api</span>,
        <span class="sig-arg">max_api</span>,
        <span class="sig-arg">is_nonzero</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_aritlog_blocks">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>get all blocks that are within the limits specified by the heuristic 
  parameters. parameters are the same as in function 
  &quot;update_thresholds&quot; except param is_nonzero: defines whether 
  zeroing instructions (like xor eax, eax) shall be counted or not. type 
  is_nonzero: boolean</p>
  <dl class="fields">
    <dt>Returns:</dt>
        <dd>a list of AritlogBasicBlock data objects, according to the 
          parameters</dd>
  </dl>
</td></tr></table>
</div>
<a name="get_unfiltered_block_count"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">get_unfiltered_block_count</span>(<span class="sig-arg">self</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_unfiltered_block_count">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>returns the number of basic blocks that have been analyzed.</p>
  <dl class="fields">
    <dt>Returns:</dt>
        <dd>(int) number of basic blocks</dd>
  </dl>
</td></tr></table>
</div>
<a name="get_segment_data"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">get_segment_data</span>(<span class="sig-arg">self</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_segment_data">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>returns the raw bytes of the segments as stored by IDA</p>
  <dl class="fields">
    <dt>Returns:</dt>
        <dd>a list of Segment data objects.</dd>
  </dl>
</td></tr></table>
</div>
<a name="scan_crypto_patterns"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">scan_crypto_patterns</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">pattern_size</span>=<span class="sig-default">32</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.scan_crypto_patterns">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>perform a scan ofr signatures. For matching, the standard python re 
  module is used.</p>
  <dl class="fields">
    <dt>Returns:</dt>
        <dd>A list of CryptoSignatureHit data objects</dd>
  </dl>
</td></tr></table>
</div>
<a name="get_signature_length"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">get_signature_length</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">signature_name</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_signature_length">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>returns the length for a signature, identified by its name</p>
  <dl class="fields">
    <dt>Parameters:</dt>
    <dd><ul class="nomargin-top">
        <li><strong class="pname"><code>signature_name</code></strong> (str) - name for a signature, e.g. &quot;ADLER 32&quot;</li>
    </ul></dd>
    <dt>Returns:</dt>
        <dd>(int) length of the signature.</dd>
  </dl>
</td></tr></table>
</div>
<a name="get_xrefs_to_address"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">get_xrefs_to_address</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">address</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_xrefs_to_address">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>get all references to a certain address. These are no xrefs in IDA 
  sense but references to the crypto signatures. If the signature points to
  an instruction, e.g. if a constant is moved to a register, the return is 
  flagged as &quot;True&quot;, meaning it is an in-code reference.</p>
  <dl class="fields">
    <dt>Parameters:</dt>
    <dd><ul class="nomargin-top">
        <li><strong class="pname"><code>address</code></strong> (int) - an arbitrary address</li>
    </ul></dd>
    <dt>Returns:</dt>
        <dd>a list of tuples (int, boolean)</dd>
  </dl>
</td></tr></table>
</div>
<a name="get_signature_hits"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">get_signature_hits</span>(<span class="sig-arg">self</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="IDAscope.idascope.core.CryptoIdentifier-pysrc.html#CryptoIdentifier.get_signature_hits">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>Get all signature hits that have a length of at least 
  match_filter_factor percent of the signature they triggered. Hits are 
  grouped by signature names.</p>
  <dl class="fields">
    <dt>Returns:</dt>
        <dd>a dictionary  with key/value entries of the following form: 
          (&quot;signature name&quot;, [CryptoSignatureHit])</dd>
  </dl>
</td></tr></table>
</div>
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