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<title>Crypto++: DES Class Reference</title>
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<h1>DES Class Reference</h1><!-- doxytag: class="DES" --><!-- doxytag: inherits="DES_Info,BlockCipherDocumentation" -->
<p><a href="http://www.weidai.com/scan-mirror/cs.html#DES">DES</a>
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="des_8h_source.html">des.h</a>></code></p>
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Inheritance diagram for DES:</div>
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<img src="class_d_e_s.gif" usemap="#DES_map" alt=""/>
<map id="DES_map" name="DES_map">
<area href="struct_d_e_s___info.html" alt="DES_Info" shape="rect" coords="87,56,251,80"/>
<area href="struct_block_cipher_documentation.html" alt="BlockCipherDocumentation" shape="rect" coords="261,56,425,80"/>
<area href="class_fixed_block_size.html" alt="FixedBlockSize< 8 >" shape="rect" coords="0,0,164,24"/>
<area href="class_fixed_key_length.html" alt="FixedKeyLength< 8 >" shape="rect" coords="174,0,338,24"/>
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<p><a href="class_d_e_s-members.html">List of all members.</a></p>
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<tr><td colspan="2"><h2>Classes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><b>Base</b></td></tr>
<tr><td colspan="2"><h2>Public Types</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="acf2cdef8c9a64ca67a44117658890aa5"></a><!-- doxytag: member="DES::Encryption" ref="acf2cdef8c9a64ca67a44117658890aa5" args="" -->
typedef <a class="el" href="class_block_cipher_final.html">BlockCipherFinal</a><br class="typebreak"/>
< ENCRYPTION, Base > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_e_s.html#acf2cdef8c9a64ca67a44117658890aa5">Encryption</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">implements the <a class="el" href="class_block_cipher.html" title="interface for one direction (encryption or decryption) of a block cipher">BlockCipher</a> interface <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a546cc867f9dfab26d5a41a198f738503"></a><!-- doxytag: member="DES::Decryption" ref="a546cc867f9dfab26d5a41a198f738503" args="" -->
typedef <a class="el" href="class_block_cipher_final.html">BlockCipherFinal</a><br class="typebreak"/>
< DECRYPTION, Base > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_e_s.html#a546cc867f9dfab26d5a41a198f738503">Decryption</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">implements the <a class="el" href="class_block_cipher.html" title="interface for one direction (encryption or decryption) of a block cipher">BlockCipher</a> interface <br/></td></tr>
<tr><td colspan="2"><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6f490a975dee8704a9c68771ce746335"></a><!-- doxytag: member="DES::CheckKeyParityBits" ref="a6f490a975dee8704a9c68771ce746335" args="(const byte *key)" -->
static bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_e_s.html#a6f490a975dee8704a9c68771ce746335">CheckKeyParityBits</a> (const byte *key)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">check <a class="el" href="class_d_e_s.html" title="DES">DES</a> key parity bits <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab4b48b141706addb33c955c694dd9ead"></a><!-- doxytag: member="DES::CorrectKeyParityBits" ref="ab4b48b141706addb33c955c694dd9ead" args="(byte *key)" -->
static void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_e_s.html#ab4b48b141706addb33c955c694dd9ead">CorrectKeyParityBits</a> (byte *key)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">correct <a class="el" href="class_d_e_s.html" title="DES">DES</a> key parity bits <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3328113a7778dafd4cb56cf634189be9"></a><!-- doxytag: member="DES::StaticAlgorithmName" ref="a3328113a7778dafd4cb56cf634189be9" args="()" -->
static const char * </td><td class="memItemRight" valign="bottom"><b>StaticAlgorithmName</b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af6052c926d7d040b524a829e96710496"></a><!-- doxytag: member="DES::StaticGetValidKeyLength" ref="af6052c926d7d040b524a829e96710496" args="(size_t)" -->
static size_t __cdecl </td><td class="memItemRight" valign="bottom"><b>StaticGetValidKeyLength</b> (size_t)</td></tr>
<tr><td colspan="2"><h2>Static Public Attributes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a2b051f369471fbb83d9b61a90b06e99f"></a><!-- doxytag: member="DES::BLOCKSIZE" ref="a2b051f369471fbb83d9b61a90b06e99f" args="" -->
static const int </td><td class="memItemRight" valign="bottom"><b>BLOCKSIZE</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab994d881a105849f64a973373e8f282c"></a><!-- doxytag: member="DES::KEYLENGTH" ref="ab994d881a105849f64a973373e8f282c" args="" -->
static const int </td><td class="memItemRight" valign="bottom"><b>KEYLENGTH</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a198440f34bfe0f343fab3cdbef586a3b"></a><!-- doxytag: member="DES::MIN_KEYLENGTH" ref="a198440f34bfe0f343fab3cdbef586a3b" args="" -->
static const int </td><td class="memItemRight" valign="bottom"><b>MIN_KEYLENGTH</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7c599a7ebb4e0fa4773c4cd1b4023b18"></a><!-- doxytag: member="DES::MAX_KEYLENGTH" ref="a7c599a7ebb4e0fa4773c4cd1b4023b18" args="" -->
static const int </td><td class="memItemRight" valign="bottom"><b>MAX_KEYLENGTH</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a1e9951e11c42a0a8c75bd959bcf26f31"></a><!-- doxytag: member="DES::DEFAULT_KEYLENGTH" ref="a1e9951e11c42a0a8c75bd959bcf26f31" args="" -->
static const int </td><td class="memItemRight" valign="bottom"><b>DEFAULT_KEYLENGTH</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab1a634167fe78a3ee06554a268e6d61c"></a><!-- doxytag: member="DES::IV_REQUIREMENT" ref="ab1a634167fe78a3ee06554a268e6d61c" args="" -->
static const int </td><td class="memItemRight" valign="bottom"><b>IV_REQUIREMENT</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a467a0101968e4181f770509e19ebef28"></a><!-- doxytag: member="DES::IV_LENGTH" ref="a467a0101968e4181f770509e19ebef28" args="" -->
static const int </td><td class="memItemRight" valign="bottom"><b>IV_LENGTH</b></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p><a href="http://www.weidai.com/scan-mirror/cs.html#DES">DES</a> </p>
<p>The <a class="el" href="class_d_e_s.html" title="DES">DES</a> implementation in Crypto++ ignores the parity bits (the least significant bits of each byte) in the key. However you can use <a class="el" href="class_d_e_s.html#a6f490a975dee8704a9c68771ce746335" title="check DES key parity bits">CheckKeyParityBits()</a> and <a class="el" href="class_d_e_s.html#ab4b48b141706addb33c955c694dd9ead" title="correct DES key parity bits">CorrectKeyParityBits()</a> to check or correct the parity bits if you wish. </p>
<p>Definition at line <a class="el" href="des_8h_source.html#l00036">36</a> of file <a class="el" href="des_8h_source.html">des.h</a>.</p>
<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="des_8h_source.html">des.h</a></li>
<li><a class="el" href="des_8cpp_source.html">des.cpp</a></li>
</ul>
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<hr size="1"/><address style="text-align: right;"><small>Generated on 9 Dec 2009 for Crypto++ by
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