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<a href="#pub-methods">Public Member Functions</a> |
<a href="#pub-static-methods">Static Public Member Functions</a> |
<a href="#pro-static-methods">Static Protected Member Functions</a> |
<a href="#pro-attribs">Protected Attributes</a> |
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<div class="title">StarEncryption Class Reference</div> </div>
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<p>the main class to read/.
<a href="classStarEncryption.html#details">More...</a></p>
<p><code>#include <<a class="el" href="StarEncryption_8hxx_source.html">StarEncryption.hxx</a>></code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a8ed4725417e970ea089625bf8f42fa43"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#a8ed4725417e970ea089625bf8f42fa43">StarEncryption</a> ()</td></tr>
<tr class="memdesc:a8ed4725417e970ea089625bf8f42fa43"><td class="mdescLeft"> </td><td class="mdescRight">constructor <a href="#a8ed4725417e970ea089625bf8f42fa43">More...</a><br /></td></tr>
<tr class="separator:a8ed4725417e970ea089625bf8f42fa43"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a107701060c680f0c61558c385ff598b6"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#a107701060c680f0c61558c385ff598b6">StarEncryption</a> (std::string const &password)</td></tr>
<tr class="memdesc:a107701060c680f0c61558c385ff598b6"><td class="mdescLeft"> </td><td class="mdescRight">constructor knowing the original password <a href="#a107701060c680f0c61558c385ff598b6">More...</a><br /></td></tr>
<tr class="separator:a107701060c680f0c61558c385ff598b6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a777fe14b0f5e06dbd1edbb4b29b35274"><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#a777fe14b0f5e06dbd1edbb4b29b35274">~StarEncryption</a> ()</td></tr>
<tr class="memdesc:a777fe14b0f5e06dbd1edbb4b29b35274"><td class="mdescLeft"> </td><td class="mdescRight">destructor <a href="#a777fe14b0f5e06dbd1edbb4b29b35274">More...</a><br /></td></tr>
<tr class="separator:a777fe14b0f5e06dbd1edbb4b29b35274"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7b4f467eba4a298221add9eb603f5036"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#a7b4f467eba4a298221add9eb603f5036">decode</a> (std::vector< uint8_t > &data) const</td></tr>
<tr class="memdesc:a7b4f467eba4a298221add9eb603f5036"><td class="mdescLeft"> </td><td class="mdescRight">decodes a string <a href="#a7b4f467eba4a298221add9eb603f5036">More...</a><br /></td></tr>
<tr class="separator:a7b4f467eba4a298221add9eb603f5036"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a69e1bbc855ddf7951216116f390387be"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#a69e1bbc855ddf7951216116f390387be">checkPassword</a> (uint32_t date, uint32_t time, std::vector< uint8_t > const &cryptDateTime) const</td></tr>
<tr class="memdesc:a69e1bbc855ddf7951216116f390387be"><td class="mdescLeft"> </td><td class="mdescRight">checks that the password is correct <a href="#a69e1bbc855ddf7951216116f390387be">More...</a><br /></td></tr>
<tr class="separator:a69e1bbc855ddf7951216116f390387be"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adf77ac1e42e4b2533f866e832409e61c"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#adf77ac1e42e4b2533f866e832409e61c">guessPassword</a> (uint32_t date, uint32_t time, std::vector< uint8_t > const &cryptDateTime)</td></tr>
<tr class="memdesc:adf77ac1e42e4b2533f866e832409e61c"><td class="mdescLeft"> </td><td class="mdescRight">tries to guess the password, assuming that the user's password has at most 15 characters. <a href="#adf77ac1e42e4b2533f866e832409e61c">More...</a><br /></td></tr>
<tr class="separator:adf77ac1e42e4b2533f866e832409e61c"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:afe090eaf6c3e4712f827513787d76e3e"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="libstaroffice__internal_8hxx.html#a9a3f1ff5fbf318034ef6ef3be2c53f48">STOFFInputStreamPtr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#afe090eaf6c3e4712f827513787d76e3e">decodeStream</a> (<a class="el" href="libstaroffice__internal_8hxx.html#a9a3f1ff5fbf318034ef6ef3be2c53f48">STOFFInputStreamPtr</a> input, uint8_t mask)</td></tr>
<tr class="memdesc:afe090eaf6c3e4712f827513787d76e3e"><td class="mdescLeft"> </td><td class="mdescRight">decode a zone given a mask <a href="#afe090eaf6c3e4712f827513787d76e3e">More...</a><br /></td></tr>
<tr class="separator:afe090eaf6c3e4712f827513787d76e3e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a1a190f38b436532ba4b851b1db6e867f"><td class="memItemLeft" align="right" valign="top">static uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#a1a190f38b436532ba4b851b1db6e867f">getMaskToDecodeStream</a> (uint8_t src, uint8_t dest)</td></tr>
<tr class="memdesc:a1a190f38b436532ba4b851b1db6e867f"><td class="mdescLeft"> </td><td class="mdescRight">retrieves a mask needed to decode a stream knowing a src and dest bytes <a href="#a1a190f38b436532ba4b851b1db6e867f">More...</a><br /></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-static-methods"></a>
Static Protected Member Functions</h2></td></tr>
<tr class="memitem:ad688148227362e91db38339b78458bd8"><td class="memItemLeft" align="right" valign="top">static bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#ad688148227362e91db38339b78458bd8">decode</a> (std::vector< uint8_t > &data, std::vector< uint8_t > const &cryptPasswd)</td></tr>
<tr class="memdesc:ad688148227362e91db38339b78458bd8"><td class="mdescLeft"> </td><td class="mdescRight">decodes a string <a href="#ad688148227362e91db38339b78458bd8">More...</a><br /></td></tr>
<tr class="separator:ad688148227362e91db38339b78458bd8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac173c659f66fde1adf786ffec09538f4"><td class="memItemLeft" align="right" valign="top">static bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#ac173c659f66fde1adf786ffec09538f4">findEncryptedPassword</a> (std::vector< uint8_t > const &src, std::vector< uint8_t > const &dest, uint8_t c0c1, std::vector< uint8_t > &crypter)</td></tr>
<tr class="memdesc:ac173c659f66fde1adf786ffec09538f4"><td class="mdescLeft"> </td><td class="mdescRight">try to find the crypter knowing the original data(16 bytes), the final data(16 bytes) and the value of c0+c1 <a href="#ac173c659f66fde1adf786ffec09538f4">More...</a><br /></td></tr>
<tr class="separator:ac173c659f66fde1adf786ffec09538f4"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-attribs"></a>
Protected Attributes</h2></td></tr>
<tr class="memitem:aadc1a0f2c5c7e02c6abcfd7c2c16f5f8"><td class="memItemLeft" align="right" valign="top">std::vector< uint8_t > </td><td class="memItemRight" valign="bottom"><a class="el" href="classStarEncryption.html#aadc1a0f2c5c7e02c6abcfd7c2c16f5f8">m_password</a></td></tr>
<tr class="memdesc:aadc1a0f2c5c7e02c6abcfd7c2c16f5f8"><td class="mdescLeft"> </td><td class="mdescRight">the crypted password <a href="#aadc1a0f2c5c7e02c6abcfd7c2c16f5f8">More...</a><br /></td></tr>
<tr class="separator:aadc1a0f2c5c7e02c6abcfd7c2c16f5f8"><td class="memSeparator" colspan="2"> </td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>the main class to read/. </p>
<p>. some basic encryption in StarOffice documents </p>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
<a id="a8ed4725417e970ea089625bf8f42fa43"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a8ed4725417e970ea089625bf8f42fa43">◆ </a></span>StarEncryption() <span class="overload">[1/2]</span></h2>
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<td class="memname">StarEncryption::StarEncryption </td>
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<p>constructor </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a107701060c680f0c61558c385ff598b6">◆ </a></span>StarEncryption() <span class="overload">[2/2]</span></h2>
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<td class="memname">StarEncryption::StarEncryption </td>
<td>(</td>
<td class="paramtype">std::string const & </td>
<td class="paramname"><em>password</em></td><td>)</td>
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<p>constructor knowing the original password </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a777fe14b0f5e06dbd1edbb4b29b35274">◆ </a></span>~StarEncryption()</h2>
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<td class="memname">StarEncryption::~StarEncryption </td>
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<p>destructor </p>
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<h2 class="groupheader">Member Function Documentation</h2>
<a id="a69e1bbc855ddf7951216116f390387be"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a69e1bbc855ddf7951216116f390387be">◆ </a></span>checkPassword()</h2>
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<td class="memname">bool StarEncryption::checkPassword </td>
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<td class="paramtype">uint32_t </td>
<td class="paramname"><em>date</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">uint32_t </td>
<td class="paramname"><em>time</em>, </td>
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<td class="paramtype">std::vector< uint8_t > const & </td>
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<p>checks that the password is correct </p>
<p class="reference">Referenced by <a class="el" href="classStarEncryption.html#a7b4f467eba4a298221add9eb603f5036">decode()</a>.</p>
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<a id="a7b4f467eba4a298221add9eb603f5036"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7b4f467eba4a298221add9eb603f5036">◆ </a></span>decode() <span class="overload">[1/2]</span></h2>
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<td class="memname">bool StarEncryption::decode </td>
<td>(</td>
<td class="paramtype">std::vector< uint8_t > & </td>
<td class="paramname"><em>data</em></td><td>)</td>
<td> const</td>
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<p>decodes a string </p>
<p class="reference">Referenced by <a class="el" href="classStarEncryption.html#a69e1bbc855ddf7951216116f390387be">checkPassword()</a>, <a class="el" href="classStarEncryption.html#adf77ac1e42e4b2533f866e832409e61c">guessPassword()</a>, and <a class="el" href="classStarEncryption.html#a107701060c680f0c61558c385ff598b6">StarEncryption()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ad688148227362e91db38339b78458bd8">◆ </a></span>decode() <span class="overload">[2/2]</span></h2>
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<td>(</td>
<td class="paramtype">std::vector< uint8_t > & </td>
<td class="paramname"><em>data</em>, </td>
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<td class="paramtype">std::vector< uint8_t > const & </td>
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<td>)</td>
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<p>decodes a string </p>
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<h2 class="memtitle"><span class="permalink"><a href="#afe090eaf6c3e4712f827513787d76e3e">◆ </a></span>decodeStream()</h2>
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<td class="memname"><a class="el" href="libstaroffice__internal_8hxx.html#a9a3f1ff5fbf318034ef6ef3be2c53f48">STOFFInputStreamPtr</a> StarEncryption::decodeStream </td>
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<td class="paramtype"><a class="el" href="libstaroffice__internal_8hxx.html#a9a3f1ff5fbf318034ef6ef3be2c53f48">STOFFInputStreamPtr</a> </td>
<td class="paramname"><em>input</em>, </td>
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<td class="paramtype">uint8_t </td>
<td class="paramname"><em>mask</em> </td>
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<p>decode a zone given a mask </p>
<p class="reference">Referenced by <a class="el" href="classStarEncryption.html#a7b4f467eba4a298221add9eb603f5036">decode()</a>, <a class="el" href="classStarObjectSpreadsheet.html#a5ecc8fbc4f73052f948467c9ed72a4fc">StarObjectSpreadsheet::readCalcDocument()</a>, and <a class="el" href="classStarObjectDraw.html#add6faf3cca52ce4e2c9d45aec4e1ff82">StarObjectDraw::readDrawDocument()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ac173c659f66fde1adf786ffec09538f4">◆ </a></span>findEncryptedPassword()</h2>
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<td class="memname">bool StarEncryption::findEncryptedPassword </td>
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<td class="paramtype">std::vector< uint8_t > const & </td>
<td class="paramname"><em>src</em>, </td>
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<td class="paramtype">std::vector< uint8_t > & </td>
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<p>try to find the crypter knowing the original data(16 bytes), the final data(16 bytes) and the value of c0+c1 </p>
<dl class="section note"><dt>Note</dt><dd>if we know the value of crypter[0]+crypter[1] (modulo 256), there is at most one potential candidate. So we compute it checking that crypter[0]+crypter[1] verifies the modulo relation. </dd></dl>
<p class="reference">Referenced by <a class="el" href="classStarEncryption.html#a7b4f467eba4a298221add9eb603f5036">decode()</a>, and <a class="el" href="classStarEncryption.html#adf77ac1e42e4b2533f866e832409e61c">guessPassword()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a1a190f38b436532ba4b851b1db6e867f">◆ </a></span>getMaskToDecodeStream()</h2>
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<p>retrieves a mask needed to decode a stream knowing a src and dest bytes </p>
<dl class="section note"><dt>Note</dt><dd>given a passwd, SvStream creates a mask from the passwd and used it to decode a stream, thus we need only this mask for decoding a crypt stream.</dd></dl>
<p>Moreover as this method is used to crypt a StarCalcDocument stream, and we know that a valid StarCalcDocument stream must begin by XX42, we can easily retrieve the password mask and use it to uncrypt this stream... </p>
<p class="reference">Referenced by <a class="el" href="classStarEncryption.html#a7b4f467eba4a298221add9eb603f5036">decode()</a>, <a class="el" href="classStarObjectSpreadsheet.html#a5ecc8fbc4f73052f948467c9ed72a4fc">StarObjectSpreadsheet::readCalcDocument()</a>, and <a class="el" href="classStarObjectDraw.html#add6faf3cca52ce4e2c9d45aec4e1ff82">StarObjectDraw::readDrawDocument()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#adf77ac1e42e4b2533f866e832409e61c">◆ </a></span>guessPassword()</h2>
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<p>tries to guess the password, assuming that the user's password has at most 15 characters. </p>
<dl class="section note"><dt>Note</dt><dd>if we know the date, the time and the encrypted date time string, there is at most 256 encrypted passwords which can correspond (in pratical case, I find about 10 potential candidates). So we loop over these potential encrypted passwords and recompute the original password to select the passwords which ends with more ' ' characters than the other one. We fail if we find no encrypted password or if we can not select an unique best canditate.</dd></dl>
<p>As the StarOffice's algorithm adds trailing spaces if the password does not contain 16 characters, this may give almost alway good result if the user has not chosen a password with 16 characters.</p>
<p>If we success, we store the encrypted password to be used for further encryption. </p>
<p class="reference">Referenced by <a class="el" href="classStarEncryption.html#a7b4f467eba4a298221add9eb603f5036">decode()</a>.</p>
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<h2 class="groupheader">Member Data Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#aadc1a0f2c5c7e02c6abcfd7c2c16f5f8">◆ </a></span>m_password</h2>
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<td class="memname">std::vector<uint8_t> StarEncryption::m_password</td>
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<p>the crypted password </p>
<p class="reference">Referenced by <a class="el" href="classStarEncryption.html#a7b4f467eba4a298221add9eb603f5036">decode()</a>, <a class="el" href="classStarEncryption.html#adf77ac1e42e4b2533f866e832409e61c">guessPassword()</a>, and <a class="el" href="classStarEncryption.html#a107701060c680f0c61558c385ff598b6">StarEncryption()</a>.</p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="StarEncryption_8hxx_source.html">StarEncryption.hxx</a></li>
<li><a class="el" href="StarEncryption_8cxx.html">StarEncryption.cxx</a></li>
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