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<!DOCTYPE html>
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Class: Msf::Exploit::Git::Packfile
&mdash; Documentation by YARD 0.9.37
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<a href="../../../_index.html">Index (P)</a> &raquo;
<span class='title'><span class='object_link'><a href="../../../Msf.html" title="Msf (module)">Msf</a></span></span> &raquo; <span class='title'><span class='object_link'><a href="../../Exploit.html" title="Msf::Exploit (class)">Exploit</a></span></span> &raquo; <span class='title'><span class='object_link'><a href="../Git.html" title="Msf::Exploit::Git (module)">Git</a></span></span>
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<div id="content"><h1>Class: Msf::Exploit::Git::Packfile
</h1>
<div class="box_info">
<dl>
<dt>Inherits:</dt>
<dd>
<span class="inheritName">Object</span>
<ul class="fullTree">
<li>Object</li>
<li class="next">Msf::Exploit::Git::Packfile</li>
</ul>
<a href="#" class="inheritanceTree">show all</a>
</dd>
</dl>
<dl>
<dt>Defined in:</dt>
<dd>lib/msf/core/exploit/git/packfile.rb</dd>
</dl>
</div>
<h2>Instance Attribute Summary <small><a href="#" class="summary_toggle">collapse</a></small></h2>
<ul class="summary">
<li class="public ">
<span class="summary_signature">
<a href="#checksum-instance_method" title="#checksum (instance method)">#<strong>checksum</strong> &#x21d2; Object </a>
</span>
<span class="note title readonly">readonly</span>
<span class="summary_desc"><div class='inline'>
<p>Returns the value of attribute checksum.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#data-instance_method" title="#data (instance method)">#<strong>data</strong> &#x21d2; Object </a>
</span>
<span class="note title readonly">readonly</span>
<span class="summary_desc"><div class='inline'>
<p>Returns the value of attribute data.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#git_objects-instance_method" title="#git_objects (instance method)">#<strong>git_objects</strong> &#x21d2; Object </a>
</span>
<span class="note title readonly">readonly</span>
<span class="summary_desc"><div class='inline'>
<p>Returns the value of attribute git_objects.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#version-instance_method" title="#version (instance method)">#<strong>version</strong> &#x21d2; Object </a>
</span>
<span class="note title readonly">readonly</span>
<span class="summary_desc"><div class='inline'>
<p>Returns the value of attribute version.</p>
</div></span>
</li>
</ul>
<h2>
Class Method Summary
<small><a href="#" class="summary_toggle">collapse</a></small>
</h2>
<ul class="summary">
<li class="public ">
<span class="summary_signature">
<a href="#apply_delta-class_method" title="apply_delta (class method)">.<strong>apply_delta</strong>(delta, git_objects) &#x21d2; Object </a>
</span>
<span class="summary_desc"><div class='inline'></div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#get_variable_len_num-class_method" title="get_variable_len_num (class method)">.<strong>get_variable_len_num</strong>(data, curr_pos) &#x21d2; Object </a>
</span>
<span class="summary_desc"><div class='inline'></div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#read_delta-class_method" title="read_delta (class method)">.<strong>read_delta</strong>(type, content, base_obj_sha) &#x21d2; Object </a>
</span>
<span class="summary_desc"><div class='inline'></div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#read_packfile-class_method" title="read_packfile (class method)">.<strong>read_packfile</strong>(data) &#x21d2; Object </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>Read the contents of the packfile and constructs the objects found return Array of GitObjects found in the packfile.</p>
</div></span>
</li>
</ul>
<h2>
Instance Method Summary
<small><a href="#" class="summary_toggle">collapse</a></small>
</h2>
<ul class="summary">
<li class="public ">
<span class="summary_signature">
<a href="#format_objects-instance_method" title="#format_objects (instance method)">#<strong>format_objects</strong> &#x21d2; Object </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>Each object has a variable-sized header, with the size being determined by the length of the object’s original, uncompressed content.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#header-instance_method" title="#header (instance method)">#<strong>header</strong> &#x21d2; Object </a>
</span>
<span class="summary_desc"><div class='inline'></div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#initialize-instance_method" title="#initialize (instance method)">#<strong>initialize</strong>(version = nil, objs) &#x21d2; Packfile </a>
</span>
<span class="note title constructor">constructor</span>
<span class="summary_desc"><div class='inline'>
<p>A new instance of Packfile.</p>
</div></span>
</li>
</ul>
<div id="constructor_details" class="method_details_list">
<h2>Constructor Details</h2>
<div class="method_details first">
<h3 class="signature first" id="initialize-instance_method">
#<strong>initialize</strong>(version = nil, objs) &#x21d2; <tt><span class='object_link'><a href="" title="Msf::Exploit::Git::Packfile (class)">Packfile</a></span></tt>
</h3><div class="docstring">
<div class="discussion">
<p>Returns a new instance of Packfile.</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 25</span>
<span class='kw'>def</span> <span class='id identifier rubyid_initialize'>initialize</span><span class='lparen'>(</span><span class='id identifier rubyid_version'>version</span> <span class='op'>=</span> <span class='kw'>nil</span><span class='comma'>,</span> <span class='id identifier rubyid_objs'>objs</span><span class='rparen'>)</span>
<span class='ivar'>@version</span> <span class='op'>=</span> <span class='id identifier rubyid_version'>version</span><span class='period'>.</span><span class='id identifier rubyid_nil?'>nil?</span> <span class='op'>?</span> <span class='const'><span class='object_link'><a href="../Git.html#VERSION-constant" title="Msf::Exploit::Git::VERSION (constant)">VERSION</a></span></span> <span class='op'>:</span> <span class='id identifier rubyid_version'>version</span><span class='period'>.</span><span class='id identifier rubyid_to_i'>to_i</span>
<span class='ivar'>@git_objects</span> <span class='op'>=</span> <span class='id identifier rubyid_objs'>objs</span><span class='period'>.</span><span class='id identifier rubyid_kind_of?'>kind_of?</span><span class='lparen'>(</span><span class='const'>Array</span><span class='rparen'>)</span> <span class='op'>?</span> <span class='id identifier rubyid_objs'>objs</span> <span class='op'>:</span> <span class='lbracket'>[</span> <span class='id identifier rubyid_objs'>objs</span> <span class='rbracket'>]</span>
<span class='id identifier rubyid_pre_check_data'>pre_check_data</span> <span class='op'>=</span> <span class='id identifier rubyid_header'>header</span> <span class='op'>+</span> <span class='id identifier rubyid_format_objects'>format_objects</span>
<span class='ivar'>@checksum</span> <span class='op'>=</span> <span class='const'>Digest</span><span class='op'>::</span><span class='const'>SHA1</span><span class='period'>.</span><span class='id identifier rubyid_hexdigest'>hexdigest</span><span class='lparen'>(</span><span class='id identifier rubyid_pre_check_data'>pre_check_data</span><span class='rparen'>)</span>
<span class='ivar'>@data</span> <span class='op'>=</span> <span class='id identifier rubyid_pre_check_data'>pre_check_data</span> <span class='op'>+</span> <span class='lbracket'>[</span> <span class='ivar'>@checksum</span> <span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_pack'>pack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>H*</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
</div>
<div id="instance_attr_details" class="attr_details">
<h2>Instance Attribute Details</h2>
<span id=""></span>
<div class="method_details first">
<h3 class="signature first" id="checksum-instance_method">
#<strong>checksum</strong> &#x21d2; <tt>Object</tt> <span class="extras">(readonly)</span>
</h3><div class="docstring">
<div class="discussion">
<p>Returns the value of attribute checksum.</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 23</span>
<span class='kw'>def</span> <span class='id identifier rubyid_checksum'>checksum</span>
<span class='ivar'>@checksum</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<span id=""></span>
<div class="method_details ">
<h3 class="signature " id="data-instance_method">
#<strong>data</strong> &#x21d2; <tt>Object</tt> <span class="extras">(readonly)</span>
</h3><div class="docstring">
<div class="discussion">
<p>Returns the value of attribute data.</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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<td>
<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 23</span>
<span class='kw'>def</span> <span class='id identifier rubyid_data'>data</span>
<span class='ivar'>@data</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<span id=""></span>
<div class="method_details ">
<h3 class="signature " id="git_objects-instance_method">
#<strong>git_objects</strong> &#x21d2; <tt>Object</tt> <span class="extras">(readonly)</span>
</h3><div class="docstring">
<div class="discussion">
<p>Returns the value of attribute git_objects.</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 23</span>
<span class='kw'>def</span> <span class='id identifier rubyid_git_objects'>git_objects</span>
<span class='ivar'>@git_objects</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<span id=""></span>
<div class="method_details ">
<h3 class="signature " id="version-instance_method">
#<strong>version</strong> &#x21d2; <tt>Object</tt> <span class="extras">(readonly)</span>
</h3><div class="docstring">
<div class="discussion">
<p>Returns the value of attribute version.</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 23</span>
<span class='kw'>def</span> <span class='id identifier rubyid_version'>version</span>
<span class='ivar'>@version</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
</div>
<div id="class_method_details" class="method_details_list">
<h2>Class Method Details</h2>
<div class="method_details first">
<h3 class="signature first" id="apply_delta-class_method">
.<strong>apply_delta</strong>(delta, git_objects) &#x21d2; <tt>Object</tt>
</h3><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 285</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_apply_delta'>apply_delta</span><span class='lparen'>(</span><span class='id identifier rubyid_delta'>delta</span><span class='comma'>,</span> <span class='id identifier rubyid_git_objects'>git_objects</span><span class='rparen'>)</span>
<span class='id identifier rubyid_target'>target</span> <span class='op'>=</span> <span class='kw'>nil</span>
<span class='kw'>case</span> <span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:inst</span><span class='rbracket'>]</span>
<span class='kw'>when</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>copy</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_base_obj'>base_obj</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="GitObject.html" title="Msf::Exploit::Git::GitObject (class)">GitObject</a></span></span><span class='period'>.</span><span class='id identifier rubyid_find_object'><span class='object_link'><a href="GitObject.html#find_object-class_method" title="Msf::Exploit::Git::GitObject.find_object (method)">find_object</a></span></span><span class='lparen'>(</span><span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:base</span><span class='rbracket'>]</span><span class='comma'>,</span> <span class='id identifier rubyid_git_objects'>git_objects</span><span class='rparen'>)</span>
<span class='kw'>return</span> <span class='kw'>nil</span> <span class='kw'>unless</span> <span class='id identifier rubyid_base_obj'>base_obj</span>
<span class='id identifier rubyid_offset'>offset</span> <span class='op'>=</span> <span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:offset</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_size'>size</span> <span class='op'>=</span> <span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:size</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='id identifier rubyid_base_obj'>base_obj</span><span class='period'>.</span><span class='id identifier rubyid_type'>type</span>
<span class='id identifier rubyid_content'>content</span> <span class='op'>=</span> <span class='id identifier rubyid_base_obj'>base_obj</span><span class='period'>.</span><span class='id identifier rubyid_content'>content</span>
<span class='id identifier rubyid_content'>content</span> <span class='op'>=</span> <span class='id identifier rubyid_content'>content</span><span class='lbracket'>[</span><span class='id identifier rubyid_offset'>offset</span><span class='op'>..</span><span class='id identifier rubyid_offset'>offset</span> <span class='op'>+</span> <span class='id identifier rubyid_size'>size</span> <span class='op'>-</span> <span class='int'>1</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_sha1'>sha1</span><span class='comma'>,</span> <span class='id identifier rubyid_compressed'>compressed</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="GitObject.html" title="Msf::Exploit::Git::GitObject (class)">GitObject</a></span></span><span class='period'>.</span><span class='id identifier rubyid_build_object'><span class='object_link'><a href="GitObject.html#build_object-class_method" title="Msf::Exploit::Git::GitObject.build_object (method)">build_object</a></span></span><span class='lparen'>(</span><span class='id identifier rubyid_type'>type</span><span class='comma'>,</span> <span class='id identifier rubyid_content'>content</span><span class='rparen'>)</span>
<span class='id identifier rubyid_target'>target</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="GitObject.html" title="Msf::Exploit::Git::GitObject (class)">GitObject</a></span></span><span class='period'>.</span><span class='id identifier rubyid_new'><span class='object_link'><a href="GitObject.html#initialize-instance_method" title="Msf::Exploit::Git::GitObject#initialize (method)">new</a></span></span><span class='lparen'>(</span><span class='id identifier rubyid_type'>type</span><span class='comma'>,</span> <span class='id identifier rubyid_content'>content</span><span class='comma'>,</span> <span class='id identifier rubyid_sha1'>sha1</span><span class='comma'>,</span> <span class='id identifier rubyid_compressed'>compressed</span><span class='rparen'>)</span>
<span class='kw'>when</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>insert</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_size'>size</span> <span class='op'>=</span> <span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:size</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_base_obj'>base_obj</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="GitObject.html" title="Msf::Exploit::Git::GitObject (class)">GitObject</a></span></span><span class='period'>.</span><span class='id identifier rubyid_find_object'><span class='object_link'><a href="GitObject.html#find_object-class_method" title="Msf::Exploit::Git::GitObject.find_object (method)">find_object</a></span></span><span class='lparen'>(</span><span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:base</span><span class='rbracket'>]</span><span class='comma'>,</span> <span class='id identifier rubyid_git_objects'>git_objects</span><span class='rparen'>)</span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='id identifier rubyid_base_obj'>base_obj</span><span class='period'>.</span><span class='id identifier rubyid_type'>type</span>
<span class='id identifier rubyid_sha1'>sha1</span><span class='comma'>,</span> <span class='id identifier rubyid_compressed'>compressed</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="GitObject.html" title="Msf::Exploit::Git::GitObject (class)">GitObject</a></span></span><span class='period'>.</span><span class='id identifier rubyid_build_object'><span class='object_link'><a href="GitObject.html#build_object-class_method" title="Msf::Exploit::Git::GitObject.build_object (method)">build_object</a></span></span><span class='lparen'>(</span><span class='id identifier rubyid_type'>type</span><span class='comma'>,</span> <span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:data</span><span class='rbracket'>]</span><span class='rparen'>)</span>
<span class='id identifier rubyid_target'>target</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="GitObject.html" title="Msf::Exploit::Git::GitObject (class)">GitObject</a></span></span><span class='period'>.</span><span class='id identifier rubyid_new'><span class='object_link'><a href="GitObject.html#initialize-instance_method" title="Msf::Exploit::Git::GitObject#initialize (method)">new</a></span></span><span class='lparen'>(</span><span class='id identifier rubyid_type'>type</span><span class='comma'>,</span> <span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:data</span><span class='rbracket'>]</span><span class='comma'>,</span> <span class='id identifier rubyid_sha1'>sha1</span><span class='comma'>,</span> <span class='id identifier rubyid_compressed'>compressed</span><span class='rparen'>)</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_target'>target</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="get_variable_len_num-class_method">
.<strong>get_variable_len_num</strong>(data, curr_pos) &#x21d2; <tt>Object</tt>
</h3><table class="source_code">
<tr>
<td>
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<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 312</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_get_variable_len_num'>get_variable_len_num</span><span class='lparen'>(</span><span class='id identifier rubyid_data'>data</span><span class='comma'>,</span> <span class='id identifier rubyid_curr_pos'>curr_pos</span><span class='rparen'>)</span>
<span class='id identifier rubyid_shift'>shift</span> <span class='op'>=</span> <span class='int'>7</span>
<span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='id identifier rubyid_curr_pos'>curr_pos</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>C</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_first'>first</span>
<span class='id identifier rubyid_offset'>offset</span> <span class='op'>=</span> <span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>&amp;</span> <span class='int'>0b01111111</span>
<span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='kw'>while</span> <span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>&gt;=</span> <span class='int'>128</span>
<span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='id identifier rubyid_curr_pos'>curr_pos</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>C</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_first'>first</span>
<span class='id identifier rubyid_offset'>offset</span> <span class='op'>=</span> <span class='lparen'>(</span><span class='id identifier rubyid_offset'>offset</span> <span class='op'>&lt;&lt;</span> <span class='id identifier rubyid_shift'>shift</span><span class='rparen'>)</span> <span class='op'>|</span> <span class='lparen'>(</span><span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>&amp;</span> <span class='int'>0b01111111</span><span class='rparen'>)</span>
<span class='id identifier rubyid_shift'>shift</span> <span class='op'>+=</span> <span class='int'>7</span>
<span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_new_pos'>new_pos</span> <span class='op'>=</span> <span class='id identifier rubyid_curr_pos'>curr_pos</span>
<span class='kw'>return</span> <span class='id identifier rubyid_offset'>offset</span><span class='comma'>,</span> <span class='id identifier rubyid_new_pos'>new_pos</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="read_delta-class_method">
.<strong>read_delta</strong>(type, content, base_obj_sha) &#x21d2; <tt>Object</tt>
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<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 196</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_read_delta'>read_delta</span><span class='lparen'>(</span><span class='id identifier rubyid_type'>type</span><span class='comma'>,</span> <span class='id identifier rubyid_content'>content</span><span class='comma'>,</span> <span class='id identifier rubyid_base_obj_sha'>base_obj_sha</span><span class='rparen'>)</span>
<span class='id identifier rubyid_source_len'>source_len</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_target_len'>target_len</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_delta'>delta</span> <span class='op'>=</span> <span class='lbrace'>{</span> <span class='label'>type:</span> <span class='id identifier rubyid_type'>type</span><span class='comma'>,</span> <span class='label'>base:</span> <span class='id identifier rubyid_base_obj_sha'>base_obj_sha</span> <span class='rbrace'>}</span>
<span class='id identifier rubyid_start'>start</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_base_len'>base_len</span><span class='comma'>,</span> <span class='id identifier rubyid_start'>start</span> <span class='op'>=</span> <span class='id identifier rubyid_get_variable_len_num'>get_variable_len_num</span><span class='lparen'>(</span><span class='id identifier rubyid_content'>content</span><span class='comma'>,</span> <span class='id identifier rubyid_start'>start</span><span class='rparen'>)</span>
<span class='id identifier rubyid_target_len'>target_len</span><span class='comma'>,</span> <span class='id identifier rubyid_start'>start</span> <span class='op'>=</span> <span class='id identifier rubyid_get_variable_len_num'>get_variable_len_num</span><span class='lparen'>(</span><span class='id identifier rubyid_content'>content</span><span class='comma'>,</span> <span class='id identifier rubyid_start'>start</span><span class='rparen'>)</span>
<span class='id identifier rubyid_inst_type'>inst_type</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_inst'>inst</span> <span class='op'>=</span> <span class='id identifier rubyid_content'>content</span><span class='lbracket'>[</span><span class='id identifier rubyid_start'>start</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>C</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_first'>first</span>
<span class='id identifier rubyid_start'>start</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='id identifier rubyid_num_bytes'>num_bytes</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='kw'>if</span> <span class='id identifier rubyid_inst'>inst</span> <span class='op'>&gt;=</span> <span class='int'>128</span>
<span class='id identifier rubyid_inst_type'>inst_type</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>copy</span><span class='tstring_end'>&#39;</span></span>
<span class='comment'># now determine the offset
</span> <span class='id identifier rubyid_shift'>shift</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_offset_mask'>offset_mask</span> <span class='op'>=</span> <span class='lbracket'>[</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_off_bits'>off_bits</span> <span class='op'>=</span> <span class='id identifier rubyid_inst'>inst</span> <span class='op'>&amp;</span> <span class='int'>0b1111</span>
<span class='lparen'>(</span><span class='int'>0</span><span class='op'>..</span><span class='int'>3</span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_idx'>idx</span><span class='op'>|</span>
<span class='kw'>if</span> <span class='lparen'>(</span><span class='id identifier rubyid_off_bits'>off_bits</span> <span class='op'>&gt;&gt;</span> <span class='id identifier rubyid_idx'>idx</span><span class='rparen'>)</span> <span class='op'>&amp;</span> <span class='int'>1</span> <span class='op'>==</span> <span class='int'>1</span>
<span class='id identifier rubyid_num_bytes'>num_bytes</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='id identifier rubyid_offset_mask'>offset_mask</span><span class='period'>.</span><span class='id identifier rubyid_prepend'>prepend</span><span class='lparen'>(</span><span class='int'>0b11111111</span><span class='rparen'>)</span>
<span class='kw'>else</span>
<span class='id identifier rubyid_offset_mask'>offset_mask</span><span class='period'>.</span><span class='id identifier rubyid_prepend'>prepend</span><span class='lparen'>(</span><span class='int'>0b00000000</span><span class='rparen'>)</span>
<span class='kw'>end</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_offset'>offset</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='kw'>unless</span> <span class='id identifier rubyid_num_bytes'>num_bytes</span> <span class='op'>==</span> <span class='int'>0</span>
<span class='id identifier rubyid_shift'>shift</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_byte_idx'>byte_idx</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_off_bytes'>off_bytes</span> <span class='op'>=</span> <span class='id identifier rubyid_content'>content</span><span class='lbracket'>[</span><span class='id identifier rubyid_start'>start</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&quot;</span><span class='tstring_content'>C</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_num_bytes'>num_bytes</span><span class='embexpr_end'>}</span><span class='tstring_end'>&quot;</span></span><span class='rparen'>)</span>
<span class='lparen'>(</span><span class='int'>0</span><span class='op'>..</span><span class='int'>3</span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_idx'>idx</span><span class='op'>|</span>
<span class='kw'>if</span> <span class='id identifier rubyid_offset_mask'>offset_mask</span><span class='lbracket'>[</span><span class='int'>3</span> <span class='op'>-</span> <span class='id identifier rubyid_idx'>idx</span><span class='rbracket'>]</span> <span class='op'>==</span> <span class='int'>255</span>
<span class='id identifier rubyid_offset'>offset</span> <span class='op'>|=</span> <span class='lparen'>(</span><span class='lparen'>(</span><span class='id identifier rubyid_off_bytes'>off_bytes</span><span class='lbracket'>[</span><span class='id identifier rubyid_byte_idx'>byte_idx</span><span class='rbracket'>]</span> <span class='op'>&amp;</span> <span class='id identifier rubyid_offset_mask'>offset_mask</span><span class='lbracket'>[</span><span class='int'>3</span> <span class='op'>-</span> <span class='id identifier rubyid_idx'>idx</span><span class='rbracket'>]</span><span class='rparen'>)</span> <span class='op'>&lt;&lt;</span> <span class='id identifier rubyid_shift'>shift</span><span class='rparen'>)</span>
<span class='id identifier rubyid_byte_idx'>byte_idx</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='kw'>else</span>
<span class='id identifier rubyid_offset'>offset</span> <span class='op'>|=</span> <span class='lparen'>(</span><span class='int'>0</span> <span class='op'>&lt;&lt;</span> <span class='id identifier rubyid_shift'>shift</span><span class='rparen'>)</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_shift'>shift</span> <span class='op'>+=</span> <span class='int'>7</span>
<span class='kw'>end</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:offset</span><span class='rbracket'>]</span> <span class='op'>=</span> <span class='id identifier rubyid_offset'>offset</span>
<span class='id identifier rubyid_size'>size</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_num_bytes'>num_bytes</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_size_mask'>size_mask</span> <span class='op'>=</span> <span class='lbracket'>[</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_size_bits'>size_bits</span> <span class='op'>=</span> <span class='lparen'>(</span><span class='id identifier rubyid_inst'>inst</span> <span class='op'>&amp;</span> <span class='int'>0b01110000</span><span class='rparen'>)</span> <span class='op'>&gt;&gt;</span> <span class='int'>4</span>
<span class='id identifier rubyid_start'>start</span> <span class='op'>+=</span> <span class='id identifier rubyid_num_bytes'>num_bytes</span>
<span class='kw'>if</span> <span class='id identifier rubyid_size_bits'>size_bits</span> <span class='op'>==</span> <span class='int'>0</span>
<span class='id identifier rubyid_size'>size</span> <span class='op'>=</span> <span class='int'>0x10000</span>
<span class='kw'>else</span>
<span class='lparen'>(</span><span class='int'>0</span><span class='op'>..</span><span class='int'>2</span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_idx'>idx</span><span class='op'>|</span>
<span class='kw'>if</span> <span class='lparen'>(</span><span class='id identifier rubyid_size_bits'>size_bits</span> <span class='op'>&gt;&gt;</span> <span class='id identifier rubyid_idx'>idx</span><span class='rparen'>)</span> <span class='op'>&amp;</span> <span class='int'>1</span> <span class='op'>==</span> <span class='int'>1</span>
<span class='id identifier rubyid_num_bytes'>num_bytes</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='id identifier rubyid_size_mask'>size_mask</span><span class='period'>.</span><span class='id identifier rubyid_prepend'>prepend</span><span class='lparen'>(</span><span class='int'>0b11111111</span><span class='rparen'>)</span>
<span class='kw'>else</span>
<span class='id identifier rubyid_size_mask'>size_mask</span><span class='period'>.</span><span class='id identifier rubyid_prepend'>prepend</span><span class='lparen'>(</span><span class='int'>0b00000000</span><span class='rparen'>)</span>
<span class='kw'>end</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_shift'>shift</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_byte_num'>byte_num</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_size_bytes'>size_bytes</span> <span class='op'>=</span> <span class='id identifier rubyid_content'>content</span><span class='lbracket'>[</span><span class='id identifier rubyid_start'>start</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&quot;</span><span class='tstring_content'>C</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_num_bytes'>num_bytes</span><span class='embexpr_end'>}</span><span class='tstring_end'>&quot;</span></span><span class='rparen'>)</span>
<span class='id identifier rubyid_start'>start</span> <span class='op'>+=</span> <span class='id identifier rubyid_num_bytes'>num_bytes</span>
<span class='lparen'>(</span><span class='int'>0</span><span class='op'>..</span><span class='int'>2</span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_idx'>idx</span><span class='op'>|</span>
<span class='kw'>if</span> <span class='id identifier rubyid_size_mask'>size_mask</span><span class='lbracket'>[</span><span class='int'>2</span> <span class='op'>-</span> <span class='id identifier rubyid_idx'>idx</span><span class='rbracket'>]</span> <span class='op'>==</span> <span class='int'>255</span>
<span class='id identifier rubyid_size'>size</span> <span class='op'>|=</span> <span class='lparen'>(</span><span class='lparen'>(</span><span class='id identifier rubyid_size_bytes'>size_bytes</span><span class='lbracket'>[</span><span class='id identifier rubyid_byte_num'>byte_num</span><span class='rbracket'>]</span> <span class='op'>&amp;</span> <span class='id identifier rubyid_size_mask'>size_mask</span><span class='lbracket'>[</span><span class='int'>2</span> <span class='op'>-</span> <span class='id identifier rubyid_idx'>idx</span><span class='rbracket'>]</span><span class='rparen'>)</span> <span class='op'>&lt;&lt;</span> <span class='id identifier rubyid_shift'>shift</span><span class='rparen'>)</span>
<span class='id identifier rubyid_byte_num'>byte_num</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='kw'>else</span>
<span class='id identifier rubyid_size'>size</span> <span class='op'>|=</span> <span class='lparen'>(</span><span class='int'>0</span> <span class='op'>&lt;&lt;</span> <span class='id identifier rubyid_shift'>shift</span><span class='rparen'>)</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_shift'>shift</span> <span class='op'>+=</span> <span class='int'>7</span>
<span class='kw'>end</span>
<span class='kw'>end</span>
<span class='kw'>else</span>
<span class='id identifier rubyid_inst_type'>inst_type</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>insert</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_size'>size</span> <span class='op'>=</span> <span class='id identifier rubyid_inst'>inst</span> <span class='op'>&amp;</span> <span class='int'>0b0111111</span>
<span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:data</span><span class='rbracket'>]</span> <span class='op'>=</span> <span class='id identifier rubyid_content'>content</span><span class='lbracket'>[</span><span class='id identifier rubyid_start'>start</span><span class='op'>..</span><span class='id identifier rubyid_start'>start</span> <span class='op'>+</span> <span class='id identifier rubyid_size'>size</span> <span class='op'>-</span> <span class='int'>1</span><span class='rbracket'>]</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:size</span><span class='rbracket'>]</span> <span class='op'>=</span> <span class='id identifier rubyid_size'>size</span>
<span class='id identifier rubyid_delta'>delta</span><span class='lbracket'>[</span><span class='symbol'>:inst</span><span class='rbracket'>]</span> <span class='op'>=</span> <span class='id identifier rubyid_inst_type'>inst_type</span>
<span class='id identifier rubyid_delta'>delta</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
<div class="method_details ">
<h3 class="signature " id="read_packfile-class_method">
.<strong>read_packfile</strong>(data) &#x21d2; <tt>Object</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Read the contents of the packfile and constructs the objects found return Array of GitObjects found in the packfile</p>
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>the</span>
<span class='type'>(<tt>String</tt>)</span>
&mdash;
<div class='inline'>
<p>packfile data</p>
</div>
</li>
</ul>
</div><table class="source_code">
<tr>
<td>
<pre class="lines">
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</td>
<td>
<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 112</span>
<span class='kw'>def</span> <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_read_packfile'>read_packfile</span><span class='lparen'>(</span><span class='id identifier rubyid_data'>data</span><span class='rparen'>)</span>
<span class='kw'>return</span> <span class='kw'>nil</span> <span class='kw'>unless</span> <span class='id identifier rubyid_data'>data</span>
<span class='kw'>return</span> <span class='kw'>nil</span> <span class='kw'>if</span> <span class='id identifier rubyid_data'>data</span><span class='period'>.</span><span class='id identifier rubyid_empty?'>empty?</span>
<span class='id identifier rubyid_pack_start'>pack_start</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='period'>.</span><span class='id identifier rubyid_index'>index</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>PACK</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span>
<span class='kw'>return</span> <span class='kw'>nil</span> <span class='kw'>unless</span> <span class='id identifier rubyid_pack_start'>pack_start</span>
<span class='id identifier rubyid_data'>data</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='id identifier rubyid_pack_start'>pack_start</span><span class='op'>..</span><span class='op'>-</span><span class='int'>1</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_version'>version</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='int'>4</span><span class='op'>..</span><span class='int'>7</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>N</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_first'>first</span>
<span class='id identifier rubyid_obj_count'>obj_count</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='int'>8</span><span class='op'>..</span><span class='int'>11</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>N</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_first'>first</span>
<span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>=</span> <span class='int'>12</span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_pack_objs'>pack_objs</span> <span class='op'>=</span> <span class='lbracket'>[</span><span class='rbracket'>]</span>
<span class='lparen'>(</span><span class='int'>1</span><span class='op'>..</span><span class='id identifier rubyid_obj_count'>obj_count</span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_obj_index'>obj_index</span><span class='op'>|</span>
<span class='comment'># determine the current object&#39;s type first
</span> <span class='id identifier rubyid_first_byte'>first_byte</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='id identifier rubyid_curr_pos'>curr_pos</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>C</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_first'>first</span>
<span class='id identifier rubyid_num_type'>num_type</span> <span class='op'>=</span> <span class='lparen'>(</span><span class='id identifier rubyid_first_byte'>first_byte</span> <span class='op'>&amp;</span> <span class='int'>0b01110000</span><span class='rparen'>)</span> <span class='op'>&gt;&gt;</span> <span class='int'>4</span>
<span class='kw'>case</span> <span class='id identifier rubyid_num_type'>num_type</span>
<span class='kw'>when</span> <span class='const'><span class='object_link'><a href="../Git.html#OBJ_COMMIT-constant" title="Msf::Exploit::Git::OBJ_COMMIT (constant)">OBJ_COMMIT</a></span></span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>commit</span><span class='tstring_end'>&#39;</span></span>
<span class='kw'>when</span> <span class='const'><span class='object_link'><a href="../Git.html#OBJ_TREE-constant" title="Msf::Exploit::Git::OBJ_TREE (constant)">OBJ_TREE</a></span></span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>tree</span><span class='tstring_end'>&#39;</span></span>
<span class='kw'>when</span> <span class='const'><span class='object_link'><a href="../Git.html#OBJ_BLOB-constant" title="Msf::Exploit::Git::OBJ_BLOB (constant)">OBJ_BLOB</a></span></span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>blob</span><span class='tstring_end'>&#39;</span></span>
<span class='kw'>when</span> <span class='const'><span class='object_link'><a href="../Git.html#OBJ_OFS_DELTA-constant" title="Msf::Exploit::Git::OBJ_OFS_DELTA (constant)">OBJ_OFS_DELTA</a></span></span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>ofs-delta</span><span class='tstring_end'>&#39;</span></span>
<span class='kw'>when</span> <span class='const'><span class='object_link'><a href="../Git.html#OBJ_REF_DELTA-constant" title="Msf::Exploit::Git::OBJ_REF_DELTA (constant)">OBJ_REF_DELTA</a></span></span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>ref-delta</span><span class='tstring_end'>&#39;</span></span>
<span class='kw'>end</span>
<span class='comment'># now determine the size of the object&#39;s uncompressed data
</span> <span class='id identifier rubyid_shift'>shift</span> <span class='op'>=</span> <span class='int'>4</span>
<span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>=</span> <span class='id identifier rubyid_first_byte'>first_byte</span>
<span class='id identifier rubyid_size'>size</span> <span class='op'>=</span> <span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>&amp;</span> <span class='int'>0b00001111</span>
<span class='id identifier rubyid_keep_reading'>keep_reading</span> <span class='op'>=</span> <span class='kw'>false</span>
<span class='kw'>if</span> <span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>&gt;=</span> <span class='int'>128</span>
<span class='id identifier rubyid_keep_reading'>keep_reading</span> <span class='op'>=</span> <span class='kw'>true</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='kw'>while</span> <span class='id identifier rubyid_keep_reading'>keep_reading</span>
<span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='id identifier rubyid_curr_pos'>curr_pos</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>C</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_first'>first</span>
<span class='kw'>if</span> <span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>&lt;</span> <span class='int'>128</span>
<span class='id identifier rubyid_keep_reading'>keep_reading</span> <span class='op'>=</span> <span class='kw'>false</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_size'>size</span> <span class='op'>=</span> <span class='lparen'>(</span><span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>&lt;&lt;</span> <span class='id identifier rubyid_shift'>shift</span><span class='rparen'>)</span> <span class='op'>|</span> <span class='id identifier rubyid_size'>size</span>
<span class='id identifier rubyid_shift'>shift</span> <span class='op'>+=</span> <span class='int'>7</span>
<span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='kw'>end</span>
<span class='comment'># now decompress content and create Git object
</span> <span class='kw'>case</span> <span class='id identifier rubyid_type'>type</span>
<span class='kw'>when</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>ofs-delta</span><span class='tstring_end'>&#39;</span></span>
<span class='comment'># get negative offset
</span> <span class='id identifier rubyid_offset'>offset</span><span class='comma'>,</span> <span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>=</span> <span class='id identifier rubyid_get_variable_len_num'>get_variable_len_num</span><span class='lparen'>(</span><span class='id identifier rubyid_data'>data</span><span class='comma'>,</span> <span class='id identifier rubyid_curr_pos'>curr_pos</span><span class='rparen'>)</span>
<span class='id identifier rubyid_base_start'>base_start</span> <span class='op'>=</span> <span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>-</span> <span class='id identifier rubyid_offset'>offset</span>
<span class='id identifier rubyid_base_obj_sha'>base_obj_sha</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='id identifier rubyid_base_start'>base_start</span><span class='op'>..</span><span class='id identifier rubyid_base_start'>base_start</span><span class='op'>+</span><span class='int'>19</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>H*</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_first'>first</span>
<span class='kw'>when</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>ref-delta</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_base_obj_sha'>base_obj_sha</span> <span class='op'>=</span> <span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='id identifier rubyid_curr_pos'>curr_pos</span><span class='op'>..</span><span class='id identifier rubyid_curr_pos'>curr_pos</span><span class='op'>+</span><span class='int'>19</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_unpack'>unpack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>H*</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_first'>first</span>
<span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>+=</span> <span class='int'>20</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_content'>content</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="../../../Rex.html" title="Rex (module)">Rex</a></span></span><span class='op'>::</span><span class='const'>Text</span><span class='period'>.</span><span class='id identifier rubyid_zlib_inflate'>zlib_inflate</span><span class='lparen'>(</span><span class='id identifier rubyid_data'>data</span><span class='lbracket'>[</span><span class='id identifier rubyid_curr_pos'>curr_pos</span><span class='op'>..</span><span class='op'>-</span><span class='int'>1</span><span class='rbracket'>]</span><span class='rparen'>)</span>
<span class='comment'># delta objects are object types specific to packfile
</span> <span class='comment'># and do not follow same format as other Git objects
</span> <span class='kw'>if</span> <span class='id identifier rubyid_type'>type</span> <span class='op'>==</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>ofs-delta</span><span class='tstring_end'>&#39;</span></span> <span class='op'>||</span> <span class='id identifier rubyid_type'>type</span> <span class='op'>==</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>ref-delta</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_delta_obj'>delta_obj</span> <span class='op'>=</span> <span class='id identifier rubyid_read_delta'>read_delta</span><span class='lparen'>(</span><span class='id identifier rubyid_type'>type</span><span class='comma'>,</span> <span class='id identifier rubyid_content'>content</span><span class='comma'>,</span> <span class='id identifier rubyid_base_obj_sha'>base_obj_sha</span><span class='rparen'>)</span>
<span class='id identifier rubyid_pack_objs'>pack_objs</span> <span class='op'>&lt;&lt;</span> <span class='id identifier rubyid_apply_delta'>apply_delta</span><span class='lparen'>(</span><span class='id identifier rubyid_delta_obj'>delta_obj</span><span class='comma'>,</span> <span class='id identifier rubyid_pack_objs'>pack_objs</span><span class='rparen'>)</span>
<span class='kw'>else</span>
<span class='id identifier rubyid_sha1'>sha1</span><span class='comma'>,</span> <span class='id identifier rubyid_compressed'>compressed</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="GitObject.html" title="Msf::Exploit::Git::GitObject (class)">GitObject</a></span></span><span class='period'>.</span><span class='id identifier rubyid_build_object'><span class='object_link'><a href="GitObject.html#build_object-class_method" title="Msf::Exploit::Git::GitObject.build_object (method)">build_object</a></span></span><span class='lparen'>(</span><span class='id identifier rubyid_type'>type</span><span class='comma'>,</span> <span class='id identifier rubyid_content'>content</span><span class='rparen'>)</span>
<span class='id identifier rubyid_pack_objs'>pack_objs</span> <span class='op'>&lt;&lt;</span> <span class='const'><span class='object_link'><a href="GitObject.html" title="Msf::Exploit::Git::GitObject (class)">GitObject</a></span></span><span class='period'>.</span><span class='id identifier rubyid_new'><span class='object_link'><a href="GitObject.html#initialize-instance_method" title="Msf::Exploit::Git::GitObject#initialize (method)">new</a></span></span><span class='lparen'>(</span><span class='id identifier rubyid_type'>type</span><span class='comma'>,</span> <span class='id identifier rubyid_content'>content</span><span class='comma'>,</span> <span class='id identifier rubyid_sha1'>sha1</span><span class='comma'>,</span> <span class='id identifier rubyid_compressed'>compressed</span><span class='rparen'>)</span>
<span class='kw'>end</span>
<span class='comment'># update curr_pos to point to next obj header
</span> <span class='id identifier rubyid_compressed_len'>compressed_len</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="../../../Rex.html" title="Rex (module)">Rex</a></span></span><span class='op'>::</span><span class='const'>Text</span><span class='period'>.</span><span class='id identifier rubyid_zlib_deflate'>zlib_deflate</span><span class='lparen'>(</span><span class='id identifier rubyid_content'>content</span><span class='comma'>,</span> <span class='const'>Zlib</span><span class='op'>::</span><span class='const'>DEFAULT_COMPRESSION</span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_length'>length</span>
<span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>=</span> <span class='id identifier rubyid_curr_pos'>curr_pos</span> <span class='op'>+</span> <span class='id identifier rubyid_compressed_len'>compressed_len</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_pack_objs'>pack_objs</span>
<span class='kw'>end</span></pre>
</td>
</tr>
</table>
</div>
</div>
<div id="instance_method_details" class="method_details_list">
<h2>Instance Method Details</h2>
<div class="method_details first">
<h3 class="signature first" id="format_objects-instance_method">
#<strong>format_objects</strong> &#x21d2; <tt>Object</tt>
</h3><div class="docstring">
<div class="discussion">
<p>Each object has a variable-sized header, with the size being determined by the length of the object’s original, uncompressed content</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
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<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 42</span>
<span class='kw'>def</span> <span class='id identifier rubyid_format_objects'>format_objects</span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_obj_stream'>obj_stream</span> <span class='op'>=</span> <span class='lbracket'>[</span><span class='rbracket'>]</span>
<span class='ivar'>@git_objects</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_obj'>obj</span><span class='op'>|</span>
<span class='id identifier rubyid_byte_amt'>byte_amt</span> <span class='op'>=</span> <span class='int'>1</span>
<span class='id identifier rubyid_obj_data_size'>obj_data_size</span> <span class='op'>=</span> <span class='id identifier rubyid_obj'>obj</span><span class='period'>.</span><span class='id identifier rubyid_content'>content</span><span class='period'>.</span><span class='id identifier rubyid_length'>length</span>
<span class='kw'>case</span> <span class='id identifier rubyid_obj'>obj</span><span class='period'>.</span><span class='id identifier rubyid_type'>type</span>
<span class='kw'>when</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>blob</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="../Git.html#OBJ_BLOB-constant" title="Msf::Exploit::Git::OBJ_BLOB (constant)">OBJ_BLOB</a></span></span>
<span class='kw'>when</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>tree</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="../Git.html#OBJ_TREE-constant" title="Msf::Exploit::Git::OBJ_TREE (constant)">OBJ_TREE</a></span></span>
<span class='kw'>when</span> <span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>commit</span><span class='tstring_end'>&#39;</span></span>
<span class='id identifier rubyid_type'>type</span> <span class='op'>=</span> <span class='const'><span class='object_link'><a href="../Git.html#OBJ_COMMIT-constant" title="Msf::Exploit::Git::OBJ_COMMIT (constant)">OBJ_COMMIT</a></span></span>
<span class='kw'>end</span>
<span class='id identifier rubyid_num_bits'>num_bits</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='id identifier rubyid_num'>num</span> <span class='op'>=</span> <span class='id identifier rubyid_obj_data_size'>obj_data_size</span>
<span class='kw'>while</span> <span class='id identifier rubyid_num'>num</span> <span class='op'>!=</span> <span class='int'>0</span>
<span class='id identifier rubyid_num'>num</span> <span class='op'>/=</span> <span class='int'>2</span>
<span class='id identifier rubyid_num_bits'>num_bits</span> <span class='op'>+=</span> <span class='int'>1</span>
<span class='kw'>end</span>
<span class='comment'># the first byte can only hold
</span> <span class='comment'># four bits of the size of the
</span> <span class='comment'># object&#39;s content since the
</span> <span class='comment'># leading bits are reserved for
</span> <span class='comment'># value of MSB and object type
</span> <span class='kw'>if</span> <span class='id identifier rubyid_num_bits'>num_bits</span> <span class='op'>&gt;</span> <span class='int'>4</span>
<span class='kw'>if</span> <span class='id identifier rubyid_num_bits'>num_bits</span> <span class='op'>&gt;</span> <span class='int'>11</span>
<span class='id identifier rubyid_byte_amt'>byte_amt</span> <span class='op'>=</span> <span class='id identifier rubyid_num_bits'>num_bits</span> <span class='op'>/</span> <span class='int'>7</span>
<span class='id identifier rubyid_byte_amt'>byte_amt</span> <span class='op'>+=</span> <span class='int'>1</span> <span class='kw'>if</span> <span class='lparen'>(</span><span class='id identifier rubyid_num_bits'>num_bits</span> <span class='op'>%</span> <span class='int'>7</span> <span class='op'>&gt;</span> <span class='int'>0</span><span class='rparen'>)</span>
<span class='kw'>else</span>
<span class='id identifier rubyid_byte_amt'>byte_amt</span> <span class='op'>=</span> <span class='int'>2</span>
<span class='kw'>end</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_shift'>shift</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='lparen'>(</span><span class='int'>1</span><span class='op'>..</span><span class='id identifier rubyid_byte_amt'>byte_amt</span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_each'>each</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_byte'>byte</span><span class='op'>|</span>
<span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>=</span> <span class='int'>0</span>
<span class='comment'># set msb if needed
</span> <span class='kw'>if</span> <span class='id identifier rubyid_byte'>byte</span> <span class='op'>&lt;</span> <span class='id identifier rubyid_byte_amt'>byte_amt</span>
<span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>|=</span> <span class='int'>128</span>
<span class='kw'>end</span>
<span class='comment'># set the object type
</span> <span class='comment'># set last four bits for content size
</span> <span class='kw'>if</span> <span class='id identifier rubyid_byte'>byte</span> <span class='op'>==</span> <span class='int'>1</span>
<span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>|=</span> <span class='lparen'>(</span><span class='id identifier rubyid_type'>type</span> <span class='op'>&lt;&lt;</span> <span class='int'>4</span><span class='rparen'>)</span>
<span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>|=</span> <span class='lparen'>(</span><span class='id identifier rubyid_obj_data_size'>obj_data_size</span> <span class='op'>&amp;</span> <span class='int'>15</span><span class='rparen'>)</span>
<span class='kw'>else</span>
<span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='op'>=</span> <span class='lparen'>(</span><span class='id identifier rubyid_obj_data_size'>obj_data_size</span> <span class='op'>&gt;&gt;</span> <span class='int'>4</span> <span class='op'>&gt;&gt;</span> <span class='id identifier rubyid_shift'>shift</span><span class='rparen'>)</span> <span class='op'>&amp;</span> <span class='int'>127</span>
<span class='id identifier rubyid_shift'>shift</span> <span class='op'>+=</span> <span class='int'>7</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_obj_stream'>obj_stream</span> <span class='op'>&lt;&lt;</span> <span class='lbracket'>[</span> <span class='id identifier rubyid_curr_byte'>curr_byte</span> <span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_pack'>pack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>C*</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span>
<span class='kw'>end</span>
<span class='comment'># Since the object type is denoted in the preceding
</span> <span class='comment'># info, we only store the compressed object data
</span> <span class='id identifier rubyid_obj_stream'>obj_stream</span> <span class='op'>&lt;&lt;</span> <span class='const'><span class='object_link'><a href="../../../Rex.html" title="Rex (module)">Rex</a></span></span><span class='op'>::</span><span class='const'>Text</span><span class='period'>.</span><span class='id identifier rubyid_zlib_deflate'>zlib_deflate</span><span class='lparen'>(</span><span class='id identifier rubyid_obj'>obj</span><span class='period'>.</span><span class='id identifier rubyid_content'>content</span><span class='comma'>,</span> <span class='const'>Zlib</span><span class='op'>::</span><span class='const'>DEFAULT_COMPRESSION</span><span class='rparen'>)</span>
<span class='kw'>end</span>
<span class='id identifier rubyid_obj_stream'>obj_stream</span> <span class='op'>=</span> <span class='id identifier rubyid_obj_stream'>obj_stream</span><span class='period'>.</span><span class='id identifier rubyid_join'>join</span>
<span class='kw'>end</span></pre>
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<div class="method_details ">
<h3 class="signature " id="header-instance_method">
#<strong>header</strong> &#x21d2; <tt>Object</tt>
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<pre class="lines">
34
35
36</pre>
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<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/git/packfile.rb', line 34</span>
<span class='kw'>def</span> <span class='id identifier rubyid_header'>header</span>
<span class='const'><span class='object_link'><a href="../Git.html#SIGNATURE-constant" title="Msf::Exploit::Git::SIGNATURE (constant)">SIGNATURE</a></span></span> <span class='op'>+</span> <span class='lbracket'>[</span> <span class='ivar'>@version</span> <span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_pack'>pack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>N</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span> <span class='op'>+</span> <span class='lbracket'>[</span> <span class='ivar'>@git_objects</span><span class='period'>.</span><span class='id identifier rubyid_length'>length</span> <span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_pack'>pack</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>N</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span>
<span class='kw'>end</span></pre>
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