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<title>Crypto++: TruncatedHashTemplate< T > Class Template Reference</title>
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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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<a href="#pub-methods">Public Member Functions</a> |
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<div class="title">TruncatedHashTemplate< T > Class Template Reference</div> </div>
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<p>construct new HashModule with smaller <a class="el" href="class_truncated_hash_template.html#a0764e3c8769ca03dce548d896451a5ba" title="Provides the digest size of the hash.">DigestSize()</a> from existing one
<a href="class_truncated_hash_template.html#details">More...</a></p>
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<img id="dynsection-0-trigger" src="closed.png" alt="+"/> Inheritance diagram for TruncatedHashTemplate< T >:</div>
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<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:ab1cc7657479c262a5ecb5f5d4af8917b"><td class="memItemLeft" align="right" valign="top"><a id="ab1cc7657479c262a5ecb5f5d4af8917b"></a>
 </td><td class="memItemRight" valign="bottom"><b>TruncatedHashTemplate</b> (T hm, unsigned int digestSize)</td></tr>
<tr class="separator:ab1cc7657479c262a5ecb5f5d4af8917b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a03c5bc7da3eebba8f5850d21ad0fe879"><td class="memItemLeft" align="right" valign="top"><a id="a03c5bc7da3eebba8f5850d21ad0fe879"></a>
 </td><td class="memItemRight" valign="bottom"><b>TruncatedHashTemplate</b> (const byte *key, size_t keyLength, unsigned int digestSize)</td></tr>
<tr class="separator:a03c5bc7da3eebba8f5850d21ad0fe879"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a58cf3e759c44b8901b1f7b2aaece2aac"><td class="memItemLeft" align="right" valign="top"><a id="a58cf3e759c44b8901b1f7b2aaece2aac"></a>
 </td><td class="memItemRight" valign="bottom"><b>TruncatedHashTemplate</b> (size_t digestSize)</td></tr>
<tr class="separator:a58cf3e759c44b8901b1f7b2aaece2aac"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a01af99665c10d2980a4e23555067cb5d"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_truncated_hash_template.html#a01af99665c10d2980a4e23555067cb5d">Restart</a> ()</td></tr>
<tr class="memdesc:a01af99665c10d2980a4e23555067cb5d"><td class="mdescLeft"> </td><td class="mdescRight">Restart the hash. <a href="#a01af99665c10d2980a4e23555067cb5d">More...</a><br /></td></tr>
<tr class="separator:a01af99665c10d2980a4e23555067cb5d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3261842338107f4f641e493b0ceb037f"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_truncated_hash_template.html#a3261842338107f4f641e493b0ceb037f">Update</a> (const byte *input, size_t length)</td></tr>
<tr class="memdesc:a3261842338107f4f641e493b0ceb037f"><td class="mdescLeft"> </td><td class="mdescRight">Updates a hash with additional input. <a href="#a3261842338107f4f641e493b0ceb037f">More...</a><br /></td></tr>
<tr class="separator:a3261842338107f4f641e493b0ceb037f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0764e3c8769ca03dce548d896451a5ba"><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_truncated_hash_template.html#a0764e3c8769ca03dce548d896451a5ba">DigestSize</a> () const</td></tr>
<tr class="memdesc:a0764e3c8769ca03dce548d896451a5ba"><td class="mdescLeft"> </td><td class="mdescRight">Provides the digest size of the hash. <a href="#a0764e3c8769ca03dce548d896451a5ba">More...</a><br /></td></tr>
<tr class="separator:a0764e3c8769ca03dce548d896451a5ba"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8d35821fad737aaa41c6ad0a01e56510"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_truncated_hash_template.html#a8d35821fad737aaa41c6ad0a01e56510">TruncatedFinal</a> (byte *digest, size_t digestSize)</td></tr>
<tr class="memdesc:a8d35821fad737aaa41c6ad0a01e56510"><td class="mdescLeft"> </td><td class="mdescRight">Computes the hash of the current message. <a href="#a8d35821fad737aaa41c6ad0a01e56510">More...</a><br /></td></tr>
<tr class="separator:a8d35821fad737aaa41c6ad0a01e56510"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aeeae8ba7cae1d365551f156a5ff87c6d"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_truncated_hash_template.html#aeeae8ba7cae1d365551f156a5ff87c6d">TruncatedVerify</a> (const byte *digest, size_t digestLength)</td></tr>
<tr class="memdesc:aeeae8ba7cae1d365551f156a5ff87c6d"><td class="mdescLeft"> </td><td class="mdescRight">Verifies the hash of the current message. <a href="#aeeae8ba7cae1d365551f156a5ff87c6d">More...</a><br /></td></tr>
<tr class="separator:aeeae8ba7cae1d365551f156a5ff87c6d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_class_hash_transformation"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_hash_transformation')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="class_hash_transformation.html">HashTransformation</a></td></tr>
<tr class="memitem:a39b0a4c4cdc11fda358f9975b5e4137e inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_hash_transformation.html">HashTransformation</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a39b0a4c4cdc11fda358f9975b5e4137e">Ref</a> ()</td></tr>
<tr class="memdesc:a39b0a4c4cdc11fda358f9975b5e4137e inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Provides a reference to this object. <a href="class_hash_transformation.html#a39b0a4c4cdc11fda358f9975b5e4137e">More...</a><br /></td></tr>
<tr class="separator:a39b0a4c4cdc11fda358f9975b5e4137e inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a9fc0b332ef36900ca6ea5d949e95aba1 inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual byte * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a9fc0b332ef36900ca6ea5d949e95aba1">CreateUpdateSpace</a> (size_t &size)</td></tr>
<tr class="memdesc:a9fc0b332ef36900ca6ea5d949e95aba1 inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Request space which can be written into by the caller. <a href="class_hash_transformation.html#a9fc0b332ef36900ca6ea5d949e95aba1">More...</a><br /></td></tr>
<tr class="separator:a9fc0b332ef36900ca6ea5d949e95aba1 inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa0b8c7a110d8968268fd02ec32b9a8e8 inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#aa0b8c7a110d8968268fd02ec32b9a8e8">Final</a> (byte *digest)</td></tr>
<tr class="memdesc:aa0b8c7a110d8968268fd02ec32b9a8e8 inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Computes the hash of the current message. <a href="class_hash_transformation.html#aa0b8c7a110d8968268fd02ec32b9a8e8">More...</a><br /></td></tr>
<tr class="separator:aa0b8c7a110d8968268fd02ec32b9a8e8 inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af68588a8333e11066a0da91506cebbb4 inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#af68588a8333e11066a0da91506cebbb4">TagSize</a> () const</td></tr>
<tr class="memdesc:af68588a8333e11066a0da91506cebbb4 inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Provides the tag size of the hash. <a href="class_hash_transformation.html#af68588a8333e11066a0da91506cebbb4">More...</a><br /></td></tr>
<tr class="separator:af68588a8333e11066a0da91506cebbb4 inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a09c66b86bbe3c13ea9e8d74775696d42 inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a09c66b86bbe3c13ea9e8d74775696d42">BlockSize</a> () const</td></tr>
<tr class="memdesc:a09c66b86bbe3c13ea9e8d74775696d42 inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Provides the block size of the compression function. <a href="class_hash_transformation.html#a09c66b86bbe3c13ea9e8d74775696d42">More...</a><br /></td></tr>
<tr class="separator:a09c66b86bbe3c13ea9e8d74775696d42 inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aee97908d965930ee454f7a88b0ff0f71 inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#aee97908d965930ee454f7a88b0ff0f71">OptimalBlockSize</a> () const</td></tr>
<tr class="memdesc:aee97908d965930ee454f7a88b0ff0f71 inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Provides the input block size most efficient for this hash. <a href="class_hash_transformation.html#aee97908d965930ee454f7a88b0ff0f71">More...</a><br /></td></tr>
<tr class="separator:aee97908d965930ee454f7a88b0ff0f71 inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a927a808007503246a745a564ad451da5 inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a927a808007503246a745a564ad451da5">OptimalDataAlignment</a> () const</td></tr>
<tr class="memdesc:a927a808007503246a745a564ad451da5 inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Provides input and output data alignment for optimal performance. <a href="class_hash_transformation.html#a927a808007503246a745a564ad451da5">More...</a><br /></td></tr>
<tr class="separator:a927a808007503246a745a564ad451da5 inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af8124c4fca23b74bbdc43660bdae692c inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#af8124c4fca23b74bbdc43660bdae692c">CalculateDigest</a> (byte *digest, const byte *input, size_t length)</td></tr>
<tr class="memdesc:af8124c4fca23b74bbdc43660bdae692c inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Updates the hash with additional input and computes the hash of the current message. <a href="class_hash_transformation.html#af8124c4fca23b74bbdc43660bdae692c">More...</a><br /></td></tr>
<tr class="separator:af8124c4fca23b74bbdc43660bdae692c inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a16c4aecd047015d513feef4ed5b929ba inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a16c4aecd047015d513feef4ed5b929ba">Verify</a> (const byte *digest)</td></tr>
<tr class="memdesc:a16c4aecd047015d513feef4ed5b929ba inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Verifies the hash of the current message. <a href="class_hash_transformation.html#a16c4aecd047015d513feef4ed5b929ba">More...</a><br /></td></tr>
<tr class="separator:a16c4aecd047015d513feef4ed5b929ba inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:acad96df68e70d922683e5063057130b2 inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#acad96df68e70d922683e5063057130b2">VerifyDigest</a> (const byte *digest, const byte *input, size_t length)</td></tr>
<tr class="memdesc:acad96df68e70d922683e5063057130b2 inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Updates the hash with additional input and verifies the hash of the current message. <a href="class_hash_transformation.html#acad96df68e70d922683e5063057130b2">More...</a><br /></td></tr>
<tr class="separator:acad96df68e70d922683e5063057130b2 inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0b6917657eaec935750fd83e28270d76 inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a0b6917657eaec935750fd83e28270d76">CalculateTruncatedDigest</a> (byte *digest, size_t digestSize, const byte *input, size_t length)</td></tr>
<tr class="memdesc:a0b6917657eaec935750fd83e28270d76 inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Updates the hash with additional input and computes the hash of the current message. <a href="class_hash_transformation.html#a0b6917657eaec935750fd83e28270d76">More...</a><br /></td></tr>
<tr class="separator:a0b6917657eaec935750fd83e28270d76 inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7958e99717019e8b9f91672bdfe9e086 inherit pub_methods_class_hash_transformation"><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a7958e99717019e8b9f91672bdfe9e086">VerifyTruncatedDigest</a> (const byte *digest, size_t digestLength, const byte *input, size_t length)</td></tr>
<tr class="memdesc:a7958e99717019e8b9f91672bdfe9e086 inherit pub_methods_class_hash_transformation"><td class="mdescLeft"> </td><td class="mdescRight">Updates the hash with additional input and verifies the hash of the current message. <a href="class_hash_transformation.html#a7958e99717019e8b9f91672bdfe9e086">More...</a><br /></td></tr>
<tr class="separator:a7958e99717019e8b9f91672bdfe9e086 inherit pub_methods_class_hash_transformation"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_class_algorithm"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_algorithm')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="class_algorithm.html">Algorithm</a></td></tr>
<tr class="memitem:a1c77f5117ca2cd881baf26a364cfc606 inherit pub_methods_class_algorithm"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_algorithm.html#a1c77f5117ca2cd881baf26a364cfc606">Algorithm</a> (bool checkSelfTestStatus=true)</td></tr>
<tr class="memdesc:a1c77f5117ca2cd881baf26a364cfc606 inherit pub_methods_class_algorithm"><td class="mdescLeft"> </td><td class="mdescRight">Interface for all crypto algorithms. <a href="class_algorithm.html#a1c77f5117ca2cd881baf26a364cfc606">More...</a><br /></td></tr>
<tr class="separator:a1c77f5117ca2cd881baf26a364cfc606 inherit pub_methods_class_algorithm"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a4f31510a192d1121856efe8ad0a9b844 inherit pub_methods_class_algorithm"><td class="memItemLeft" align="right" valign="top">virtual std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="class_algorithm.html#a4f31510a192d1121856efe8ad0a9b844">AlgorithmName</a> () const</td></tr>
<tr class="memdesc:a4f31510a192d1121856efe8ad0a9b844 inherit pub_methods_class_algorithm"><td class="mdescLeft"> </td><td class="mdescRight">Provides the name of this algorithm. <a href="class_algorithm.html#a4f31510a192d1121856efe8ad0a9b844">More...</a><br /></td></tr>
<tr class="separator:a4f31510a192d1121856efe8ad0a9b844 inherit pub_methods_class_algorithm"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_class_clonable"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_clonable')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="class_clonable.html">Clonable</a></td></tr>
<tr class="memitem:ad0016ba2d505c23aa85aad49e6c19bb7 inherit pub_methods_class_clonable"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="class_clonable.html">Clonable</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_clonable.html#ad0016ba2d505c23aa85aad49e6c19bb7">Clone</a> () const</td></tr>
<tr class="memdesc:ad0016ba2d505c23aa85aad49e6c19bb7 inherit pub_methods_class_clonable"><td class="mdescLeft"> </td><td class="mdescRight">Copies this object. <a href="class_clonable.html#ad0016ba2d505c23aa85aad49e6c19bb7">More...</a><br /></td></tr>
<tr class="separator:ad0016ba2d505c23aa85aad49e6c19bb7 inherit pub_methods_class_clonable"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<class T><br />
class TruncatedHashTemplate< T ></h3>
<p>construct new HashModule with smaller <a class="el" href="class_truncated_hash_template.html#a0764e3c8769ca03dce548d896451a5ba" title="Provides the digest size of the hash.">DigestSize()</a> from existing one </p>
<p class="definition">Definition at line <a class="el" href="trunhash_8h_source.html#l00023">23</a> of file <a class="el" href="trunhash_8h_source.html">trunhash.h</a>.</p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="a01af99665c10d2980a4e23555067cb5d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a01af99665c10d2980a4e23555067cb5d">◆ </a></span>Restart()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template<class T > </div>
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<td class="memname">void <a class="el" href="class_truncated_hash_template.html">TruncatedHashTemplate</a>< T >::Restart </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">virtual</span></span> </td>
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<p>Restart the hash. </p>
<p>Discards the current state, and restart for a new message </p>
<p>Reimplemented from <a class="el" href="class_hash_transformation.html#a92752eebac10497211d7a065faba8725">HashTransformation</a>.</p>
<p class="definition">Definition at line <a class="el" href="trunhash_8h_source.html#l00033">33</a> of file <a class="el" href="trunhash_8h_source.html">trunhash.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a3261842338107f4f641e493b0ceb037f">◆ </a></span>Update()</h2>
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<td class="memname">void <a class="el" href="class_truncated_hash_template.html">TruncatedHashTemplate</a>< T >::Update </td>
<td>(</td>
<td class="paramtype">const byte * </td>
<td class="paramname"><em>input</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>length</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">virtual</span></span> </td>
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<p>Updates a hash with additional input. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">input</td><td>the additional input as a buffer </td></tr>
<tr><td class="paramname">length</td><td>the size of the buffer, in bytes </td></tr>
</table>
</dd>
</dl>
<p>Implements <a class="el" href="class_hash_transformation.html#aafabefaf445b65d3ba0d8e1c0294afe5">HashTransformation</a>.</p>
<p class="definition">Definition at line <a class="el" href="trunhash_8h_source.html#l00035">35</a> of file <a class="el" href="trunhash_8h_source.html">trunhash.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a0764e3c8769ca03dce548d896451a5ba">◆ </a></span>DigestSize()</h2>
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<td class="memname">unsigned int <a class="el" href="class_truncated_hash_template.html">TruncatedHashTemplate</a>< T >::DigestSize </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Provides the digest size of the hash. </p>
<dl class="section return"><dt>Returns</dt><dd>the digest size of the hash. </dd></dl>
<p>Implements <a class="el" href="class_hash_transformation.html#a9f42cc280bac76b884ad12615c0dabb5">HashTransformation</a>.</p>
<p class="definition">Definition at line <a class="el" href="trunhash_8h_source.html#l00037">37</a> of file <a class="el" href="trunhash_8h_source.html">trunhash.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a8d35821fad737aaa41c6ad0a01e56510">◆ </a></span>TruncatedFinal()</h2>
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<td class="memname">void <a class="el" href="class_truncated_hash_template.html">TruncatedHashTemplate</a>< T >::TruncatedFinal </td>
<td>(</td>
<td class="paramtype">byte * </td>
<td class="paramname"><em>digest</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>digestSize</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">virtual</span></span> </td>
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<p>Computes the hash of the current message. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">digest</td><td>a pointer to the buffer to receive the hash </td></tr>
<tr><td class="paramname">digestSize</td><td>the size of the truncated digest, in bytes</td></tr>
</table>
</dd>
</dl>
<p><a class="el" href="class_truncated_hash_template.html#a8d35821fad737aaa41c6ad0a01e56510" title="Computes the hash of the current message.">TruncatedFinal()</a> call <a class="el" href="class_hash_transformation.html#aa0b8c7a110d8968268fd02ec32b9a8e8" title="Computes the hash of the current message.">Final()</a> and then copies digestSize bytes to digest. The hash is restarted the hash for the next message. </p>
<p>Implements <a class="el" href="class_hash_transformation.html#a590ecda344aa0fb045abf42ec08823b2">HashTransformation</a>.</p>
<p class="definition">Definition at line <a class="el" href="trunhash_8h_source.html#l00038">38</a> of file <a class="el" href="trunhash_8h_source.html">trunhash.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#aeeae8ba7cae1d365551f156a5ff87c6d">◆ </a></span>TruncatedVerify()</h2>
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<td class="memname">bool <a class="el" href="class_truncated_hash_template.html">TruncatedHashTemplate</a>< T >::TruncatedVerify </td>
<td>(</td>
<td class="paramtype">const byte * </td>
<td class="paramname"><em>digest</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>digestLength</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">virtual</span></span> </td>
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<p>Verifies the hash of the current message. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">digest</td><td>a pointer to the buffer of an <em>existing</em> hash </td></tr>
<tr><td class="paramname">digestLength</td><td>the size of the truncated hash, in bytes </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>true</code> if the existing hash matches the computed hash, <code>false</code> otherwise </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">ThrowIfInvalidTruncatedSize()</td><td>if digestLength exceeds <a class="el" href="class_truncated_hash_template.html#a0764e3c8769ca03dce548d896451a5ba" title="Provides the digest size of the hash.">DigestSize()</a></td></tr>
</table>
</dd>
</dl>
<p><a class="el" href="class_truncated_hash_template.html#aeeae8ba7cae1d365551f156a5ff87c6d" title="Verifies the hash of the current message.">TruncatedVerify()</a> is a truncated version of <a class="el" href="class_hash_transformation.html#a16c4aecd047015d513feef4ed5b929ba" title="Verifies the hash of the current message.">Verify()</a>. It can operate on a buffer smaller than <a class="el" href="class_truncated_hash_template.html#a0764e3c8769ca03dce548d896451a5ba" title="Provides the digest size of the hash.">DigestSize()</a>. However, digestLength cannot exceed <a class="el" href="class_truncated_hash_template.html#a0764e3c8769ca03dce548d896451a5ba" title="Provides the digest size of the hash.">DigestSize()</a>.</p>
<p><a class="el" href="class_hash_transformation.html#a16c4aecd047015d513feef4ed5b929ba" title="Verifies the hash of the current message.">Verify()</a> performs a bitwise compare on the buffers using <a class="el" href="misc_8h.html#a8e14b85d64aa63e5ba80471716837c74" title="Performs a near constant-time comparison of two equally sized buffers.">VerifyBufsEqual()</a>, which is a constant time comparison function. digestLength cannot exceed <a class="el" href="class_truncated_hash_template.html#a0764e3c8769ca03dce548d896451a5ba" title="Provides the digest size of the hash.">DigestSize()</a>.</p>
<p><a class="el" href="class_truncated_hash_template.html#aeeae8ba7cae1d365551f156a5ff87c6d" title="Verifies the hash of the current message.">TruncatedVerify()</a> restarts the hash for the next message. </p>
<p>Reimplemented from <a class="el" href="class_hash_transformation.html#a0f6069eadf492d970c3eb8cdf656e742">HashTransformation</a>.</p>
<p class="definition">Definition at line <a class="el" href="trunhash_8h_source.html#l00040">40</a> of file <a class="el" href="trunhash_8h_source.html">trunhash.h</a>.</p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="trunhash_8h_source.html">trunhash.h</a></li>
</ul>
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