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<div id="projectname">Crypto++
 <span id="projectnumber">7.0</span>
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<div id="projectbrief">Free C++ class library of cryptographic schemes</div>
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<div class="title">adler32.h</div> </div>
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<a href="adler32_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// adler32.h - originally written and placed in the public domain by Wei Dai</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"></span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">/// \file adler32.h</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">/// \brief Class file for ADLER-32 checksum calculations</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#ifndef CRYPTOPP_ADLER32_H</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#define CRYPTOPP_ADLER32_H</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "<a class="code" href="cryptlib_8h.html">cryptlib.h</a>"</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> NAMESPACE_BEGIN(<a class="code" href="namespace_crypto_p_p.html">CryptoPP</a>)</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">/// ADLER-32 checksum calculations</span></div><div class="line"><a name="l00014"></a><span class="lineno"><a class="line" href="class_adler32.html"> 14</a></span> <span class="comment"></span>class <a class="code" href="class_adler32.html">Adler32</a> : public <a class="code" href="class_hash_transformation.html">HashTransformation</a></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> {</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  CRYPTOPP_CONSTANT(DIGESTSIZE = 4)</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <a class="code" href="class_adler32.html">Adler32</a>() {Reset();}</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keywordtype">void</span> Update(<span class="keyword">const</span> byte *input, <span class="keywordtype">size_t</span> length);</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keywordtype">void</span> TruncatedFinal(byte *hash, <span class="keywordtype">size_t</span> size);</div><div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="class_adler32.html#a56ef4334be183187b2f2a2cef435f5e8"> 21</a></span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_adler32.html#a56ef4334be183187b2f2a2cef435f5e8">DigestSize</a>()<span class="keyword"> const </span>{<span class="keywordflow">return</span> DIGESTSIZE;}</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  CRYPTOPP_STATIC_CONSTEXPR <span class="keyword">const</span> <span class="keywordtype">char</span>* StaticAlgorithmName() {<span class="keywordflow">return</span> <span class="stringliteral">"Adler32"</span>;}</div><div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="class_adler32.html#a657d304c6831091f2e8212e95f644aba"> 23</a></span>  std::string <a class="code" href="class_adler32.html#a657d304c6831091f2e8212e95f644aba">AlgorithmName</a>()<span class="keyword"> const </span>{<span class="keywordflow">return</span> StaticAlgorithmName();}</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keywordtype">void</span> Reset() {m_s1 = 1; m_s2 = 0;}</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  word16 m_s1, m_s2;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> };</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> NAMESPACE_END</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="class_adler32_html_a657d304c6831091f2e8212e95f644aba"><div class="ttname"><a href="class_adler32.html#a657d304c6831091f2e8212e95f644aba">Adler32::AlgorithmName</a></div><div class="ttdeci">std::string AlgorithmName() const</div><div class="ttdoc">Provides the name of this algorithm. </div><div class="ttdef"><b>Definition:</b> <a href="adler32_8h_source.html#l00023">adler32.h:23</a></div></div>
<div class="ttc" id="cryptlib_8h_html"><div class="ttname"><a href="cryptlib_8h.html">cryptlib.h</a></div><div class="ttdoc">Abstract base classes that provide a uniform interface to this library. </div></div>
<div class="ttc" id="class_adler32_html"><div class="ttname"><a href="class_adler32.html">Adler32</a></div><div class="ttdoc">ADLER-32 checksum calculations. </div><div class="ttdef"><b>Definition:</b> <a href="adler32_8h_source.html#l00014">adler32.h:14</a></div></div>
<div class="ttc" id="class_adler32_html_a56ef4334be183187b2f2a2cef435f5e8"><div class="ttname"><a href="class_adler32.html#a56ef4334be183187b2f2a2cef435f5e8">Adler32::DigestSize</a></div><div class="ttdeci">unsigned int DigestSize() const</div><div class="ttdoc">Provides the digest size of the hash. </div><div class="ttdef"><b>Definition:</b> <a href="adler32_8h_source.html#l00021">adler32.h:21</a></div></div>
<div class="ttc" id="class_hash_transformation_html"><div class="ttname"><a href="class_hash_transformation.html">HashTransformation</a></div><div class="ttdoc">Interface for hash functions and data processing part of MACs. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l01065">cryptlib.h:1065</a></div></div>
<div class="ttc" id="namespace_crypto_p_p_html"><div class="ttname"><a href="namespace_crypto_p_p.html">CryptoPP</a></div><div class="ttdoc">Crypto++ library namespace. </div></div>
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