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<a href="#pub-methods">Public Member Functions</a> |
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<div class="title">CTR< T > Class Template Reference</div> </div>
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<p>Implementation of the Counter (<a class="el" href="classCTR.html" title="Implementation of the Counter (CTR) mode for 128-bit block ciphers. ">CTR</a>) mode for 128-bit block ciphers.
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<a href="classCTR.html#details">More...</a></p>
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<p><code>#include <<a class="el" href="CTR_8h_source.html">CTR.h</a>></code></p>
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Inheritance diagram for CTR< T >:</div>
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<img src="classCTR.png" usemap="#CTR< T >_map" alt=""/>
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<area href="classCTRCommon.html" title="Concrete base class to assist with implementing CTR mode for 128-bit block ciphers. " alt="CTRCommon" shape="rect" coords="0,56,84,80"/>
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<area href="classCipher.html" title="Abstract base class for stream ciphers. " alt="Cipher" shape="rect" coords="0,0,84,24"/>
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</map>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
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Public Member Functions</h2></td></tr>
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<tr class="memitem:a7025ab5d79f0f0763f751aeabc425ca9"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7025ab5d79f0f0763f751aeabc425ca9"></a>
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 </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTR.html#a7025ab5d79f0f0763f751aeabc425ca9">CTR</a> ()</td></tr>
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<tr class="memdesc:a7025ab5d79f0f0763f751aeabc425ca9"><td class="mdescLeft"> </td><td class="mdescRight">Constructs a new <a class="el" href="classCTR.html" title="Implementation of the Counter (CTR) mode for 128-bit block ciphers. ">CTR</a> object for the 128-bit block cipher T. <br/></td></tr>
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<tr class="separator:a7025ab5d79f0f0763f751aeabc425ca9"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="inherit_header pub_methods_classCTRCommon"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classCTRCommon')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="classCTRCommon.html">CTRCommon</a></td></tr>
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<tr class="memitem:a29ce8e13a302350397fc6790a686bea2 inherit pub_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#a29ce8e13a302350397fc6790a686bea2">keySize</a> () const </td></tr>
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<tr class="memdesc:a29ce8e13a302350397fc6790a686bea2 inherit pub_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Default size of the key for this cipher, in bytes. <a href="#a29ce8e13a302350397fc6790a686bea2">More...</a><br/></td></tr>
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<tr class="separator:a29ce8e13a302350397fc6790a686bea2 inherit pub_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a98c1717d11d8da8e1fa108607358774a inherit pub_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#a98c1717d11d8da8e1fa108607358774a">ivSize</a> () const </td></tr>
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<tr class="memdesc:a98c1717d11d8da8e1fa108607358774a inherit pub_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Size of the initialization vector for this cipher, in bytes. <a href="#a98c1717d11d8da8e1fa108607358774a">More...</a><br/></td></tr>
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<tr class="separator:a98c1717d11d8da8e1fa108607358774a inherit pub_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ae2bc6b33a864412598b426320d853337 inherit pub_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#ae2bc6b33a864412598b426320d853337">setCounterSize</a> (size_t size)</td></tr>
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<tr class="memdesc:ae2bc6b33a864412598b426320d853337 inherit pub_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Sets the counter size for the IV. <a href="#ae2bc6b33a864412598b426320d853337">More...</a><br/></td></tr>
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<tr class="separator:ae2bc6b33a864412598b426320d853337 inherit pub_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a79da937dc2c444a174176beab33c055a inherit pub_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#a79da937dc2c444a174176beab33c055a">setKey</a> (const uint8_t *key, size_t len)</td></tr>
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<tr class="memdesc:a79da937dc2c444a174176beab33c055a inherit pub_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Sets the key to use for future encryption and decryption operations. <a href="#a79da937dc2c444a174176beab33c055a">More...</a><br/></td></tr>
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<tr class="separator:a79da937dc2c444a174176beab33c055a inherit pub_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aad289af3eb013cb3ffda6d7e8e8b3d04 inherit pub_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#aad289af3eb013cb3ffda6d7e8e8b3d04">setIV</a> (const uint8_t *iv, size_t len)</td></tr>
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<tr class="memdesc:aad289af3eb013cb3ffda6d7e8e8b3d04 inherit pub_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Sets the initial counter value to use for future encryption and decryption operations. <a href="#aad289af3eb013cb3ffda6d7e8e8b3d04">More...</a><br/></td></tr>
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<tr class="separator:aad289af3eb013cb3ffda6d7e8e8b3d04 inherit pub_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a201bda584d111552ce8ec09fac759963 inherit pub_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#a201bda584d111552ce8ec09fac759963">encrypt</a> (uint8_t *output, const uint8_t *input, size_t len)</td></tr>
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<tr class="memdesc:a201bda584d111552ce8ec09fac759963 inherit pub_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Encrypts an input buffer and writes the ciphertext to an output buffer. <a href="#a201bda584d111552ce8ec09fac759963">More...</a><br/></td></tr>
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<tr class="separator:a201bda584d111552ce8ec09fac759963 inherit pub_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a0943387cf1124258389702e0690740fe inherit pub_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#a0943387cf1124258389702e0690740fe">decrypt</a> (uint8_t *output, const uint8_t *input, size_t len)</td></tr>
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<tr class="memdesc:a0943387cf1124258389702e0690740fe inherit pub_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Decrypts an input buffer and writes the plaintext to an output buffer. <a href="#a0943387cf1124258389702e0690740fe">More...</a><br/></td></tr>
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<tr class="separator:a0943387cf1124258389702e0690740fe inherit pub_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ac0d6381c02fe2a8a017ad66d006a6ef2 inherit pub_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#ac0d6381c02fe2a8a017ad66d006a6ef2">clear</a> ()</td></tr>
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<tr class="memdesc:ac0d6381c02fe2a8a017ad66d006a6ef2 inherit pub_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Clears all security-sensitive state from this cipher. <a href="#ac0d6381c02fe2a8a017ad66d006a6ef2">More...</a><br/></td></tr>
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<tr class="separator:ac0d6381c02fe2a8a017ad66d006a6ef2 inherit pub_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="inherit_header pub_methods_classCipher"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classCipher')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="classCipher.html">Cipher</a></td></tr>
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<tr class="memitem:a6a61077eca3ccd5900f92ceac58fb09c inherit pub_methods_classCipher"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6a61077eca3ccd5900f92ceac58fb09c"></a>
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 </td><td class="memItemRight" valign="bottom"><a class="el" href="classCipher.html#a6a61077eca3ccd5900f92ceac58fb09c">Cipher</a> ()</td></tr>
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<tr class="memdesc:a6a61077eca3ccd5900f92ceac58fb09c inherit pub_methods_classCipher"><td class="mdescLeft"> </td><td class="mdescRight">Constructs a new cipher object. <br/></td></tr>
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<tr class="separator:a6a61077eca3ccd5900f92ceac58fb09c inherit pub_methods_classCipher"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a84bdea765f7e35aa5b5950dd2853a383 inherit pub_methods_classCipher"><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classCipher.html#a84bdea765f7e35aa5b5950dd2853a383">~Cipher</a> ()</td></tr>
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<tr class="memdesc:a84bdea765f7e35aa5b5950dd2853a383 inherit pub_methods_classCipher"><td class="mdescLeft"> </td><td class="mdescRight">Destroys this cipher object. <a href="#a84bdea765f7e35aa5b5950dd2853a383">More...</a><br/></td></tr>
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<tr class="separator:a84bdea765f7e35aa5b5950dd2853a383 inherit pub_methods_classCipher"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a>
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Additional Inherited Members</h2></td></tr>
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<tr class="inherit_header pro_methods_classCTRCommon"><td colspan="2" onclick="javascript:toggleInherit('pro_methods_classCTRCommon')"><img src="closed.png" alt="-"/> Protected Member Functions inherited from <a class="el" href="classCTRCommon.html">CTRCommon</a></td></tr>
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<tr class="memitem:abeb01342f17023e99776001d397c51ff inherit pro_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#abeb01342f17023e99776001d397c51ff">CTRCommon</a> ()</td></tr>
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<tr class="memdesc:abeb01342f17023e99776001d397c51ff inherit pro_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Constructs a new cipher in <a class="el" href="classCTR.html" title="Implementation of the Counter (CTR) mode for 128-bit block ciphers. ">CTR</a> mode. <a href="#abeb01342f17023e99776001d397c51ff">More...</a><br/></td></tr>
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<tr class="separator:abeb01342f17023e99776001d397c51ff inherit pro_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a6c409c4ec1f99e0cb751196d891dc228 inherit pro_methods_classCTRCommon"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classCTRCommon.html#a6c409c4ec1f99e0cb751196d891dc228">setBlockCipher</a> (<a class="el" href="classBlockCipher.html">BlockCipher</a> *cipher)</td></tr>
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<tr class="memdesc:a6c409c4ec1f99e0cb751196d891dc228 inherit pro_methods_classCTRCommon"><td class="mdescLeft"> </td><td class="mdescRight">Sets the block cipher to use for this <a class="el" href="classCTR.html" title="Implementation of the Counter (CTR) mode for 128-bit block ciphers. ">CTR</a> object. <a href="#a6c409c4ec1f99e0cb751196d891dc228">More...</a><br/></td></tr>
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<tr class="separator:a6c409c4ec1f99e0cb751196d891dc228 inherit pro_methods_classCTRCommon"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><h3>template<typename T><br/>
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class CTR< T ></h3>
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<p>Implementation of the Counter (<a class="el" href="classCTR.html" title="Implementation of the Counter (CTR) mode for 128-bit block ciphers. ">CTR</a>) mode for 128-bit block ciphers. </p>
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<p>Counter mode converts a block cipher into a stream cipher. The specific block cipher is passed as the template parameter T and the key is specified via the <a class="el" href="classCTRCommon.html#a79da937dc2c444a174176beab33c055a" title="Sets the key to use for future encryption and decryption operations. ">setKey()</a> function.</p>
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<p>Keystream blocks are generated by encrypting an increasing counter value and XOR'ing it with each byte of input. The <a class="el" href="classCTRCommon.html#a201bda584d111552ce8ec09fac759963" title="Encrypts an input buffer and writes the ciphertext to an output buffer. ">encrypt()</a> and <a class="el" href="classCTRCommon.html#a0943387cf1124258389702e0690740fe" title="Decrypts an input buffer and writes the plaintext to an output buffer. ">decrypt()</a> operations are identical.</p>
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<p>The template parameter T must be a concrete subclass of <a class="el" href="classBlockCipher.html" title="Abstract base class for block ciphers. ">BlockCipher</a> indicating the specific block cipher to use. For example, the following creates a <a class="el" href="classCTR.html" title="Implementation of the Counter (CTR) mode for 128-bit block ciphers. ">CTR</a> object using <a class="el" href="classAES256.html" title="AES block cipher with 256-bit keys. ">AES256</a> as the underlying cipher:</p>
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<div class="fragment"><div class="line"><a class="code" href="classCTR.html">CTR<AES256></a> ctr;</div>
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<div class="line">ctr.<a class="code" href="classCTRCommon.html#a79da937dc2c444a174176beab33c055a">setKey</a>(key, 32);</div>
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<div class="line">ctr.<a class="code" href="classCTRCommon.html#aad289af3eb013cb3ffda6d7e8e8b3d04">setIV</a>(iv, 16);</div>
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<div class="line">ctr.<a class="code" href="classCTRCommon.html#ae2bc6b33a864412598b426320d853337">setCounterSize</a>(4);</div>
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<div class="line">ctr.<a class="code" href="classCTRCommon.html#a201bda584d111552ce8ec09fac759963">encrypt</a>(output, input, len);</div>
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</div><!-- fragment --><p>In this example, the last 4 bytes of the IV are incremented to count blocks. The remaining bytes are left unchanged from block to block.</p>
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<p>Reference: <a href="http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation">http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation</a></p>
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<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classCFB.html" title="Implementation of the Cipher Feedback (CFB) mode for 128-bit block ciphers. ">CFB</a>, <a class="el" href="classOFB.html" title="Implementation of the Output Feedback (OFB) mode for 128-bit block ciphers. ">OFB</a>, <a class="el" href="classCBC.html" title="Implementation of the Cipher Block Chaining (CBC) mode for 128-bit block ciphers. ...">CBC</a> </dd></dl>
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<p>Definition at line <a class="el" href="CTR_8h_source.html#l00060">60</a> of file <a class="el" href="CTR_8h_source.html">CTR.h</a>.</p>
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</div><hr/>The documentation for this class was generated from the following files:<ul>
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<li><a class="el" href="CTR_8h_source.html">CTR.h</a></li>
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<li><a class="el" href="CTR_8cpp_source.html">CTR.cpp</a></li>
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</ul>
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Generated on Sun Mar 29 2015 08:30:13 for ArduinoLibs by  <a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/>
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</a> 1.8.6
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