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<title>Crypto++: PK_MessageAccumulatorImpl< HASH_ALGORITHM > Class Template Reference</title>
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<h1>PK_MessageAccumulatorImpl< HASH_ALGORITHM > Class Template Reference</h1><!-- doxytag: class="PK_MessageAccumulatorImpl" --><!-- doxytag: inherits="PK_MessageAccumulatorBase,ObjectHolder< HASH_ALGORITHM >" --><div class="dynheader">
Inheritance diagram for PK_MessageAccumulatorImpl< HASH_ALGORITHM >:</div>
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<img src="class_p_k___message_accumulator_impl.gif" usemap="#PK_MessageAccumulatorImpl< HASH_ALGORITHM >_map" alt=""/>
<map id="PK_MessageAccumulatorImpl< HASH_ALGORITHM >_map" name="PK_MessageAccumulatorImpl< HASH_ALGORITHM >_map">
<area href="class_p_k___message_accumulator_base.html" alt="PK_MessageAccumulatorBase" shape="rect" coords="0,224,318,248"/>
<area href="class_object_holder.html" alt="ObjectHolder< HASH_ALGORITHM >" shape="rect" coords="328,224,646,248"/>
<area href="class_p_k___message_accumulator.html" alt="PK_MessageAccumulator" shape="rect" coords="0,168,318,192"/>
<area href="class_hash_transformation.html" alt="HashTransformation" shape="rect" coords="0,112,318,136"/>
<area href="class_algorithm.html" alt="Algorithm" shape="rect" coords="0,56,318,80"/>
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<p><a href="class_p_k___message_accumulator_impl-members.html">List of all members.</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a8c36c8e0ae73d819234a4f71863143b7"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::AccessHash" ref="a8c36c8e0ae73d819234a4f71863143b7" args="()" -->
<a class="el" href="class_hash_transformation.html">HashTransformation</a> & </td><td class="memItemRight" valign="bottom"><b>AccessHash</b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a4dbe89c39bb43b5ce822e6db13a0dd1f"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::Update" ref="a4dbe89c39bb43b5ce822e6db13a0dd1f" args="(const byte *input, size_t length)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___message_accumulator_base.html#a4dbe89c39bb43b5ce822e6db13a0dd1f">Update</a> (const byte *input, size_t length)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">process more input <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad79cf196ecea7753beaa19d1ebf06928"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::DigestSize" ref="ad79cf196ecea7753beaa19d1ebf06928" args="() const " -->
unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___message_accumulator.html#ad79cf196ecea7753beaa19d1ebf06928">DigestSize</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">should not be called on <a class="el" href="class_p_k___message_accumulator.html" title="interface for accumulating messages to be signed or verified">PK_MessageAccumulator</a> <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7b32ac9635d646003f7a258d46a65015"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::TruncatedFinal" ref="a7b32ac9635d646003f7a258d46a65015" args="(byte *digest, size_t digestSize)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___message_accumulator.html#a7b32ac9635d646003f7a258d46a65015">TruncatedFinal</a> (byte *digest, size_t digestSize)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">should not be called on <a class="el" href="class_p_k___message_accumulator.html" title="interface for accumulating messages to be signed or verified">PK_MessageAccumulator</a> <br/></td></tr>
<tr><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><td class="mdescLeft"> </td><td class="mdescRight">return a reference to this object, <a href="#a39b0a4c4cdc11fda358f9975b5e4137e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9fc0b332ef36900ca6ea5d949e95aba1"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::CreateUpdateSpace" ref="a9fc0b332ef36900ca6ea5d949e95aba1" args="(size_t &size)" -->
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><td class="mdescLeft"> </td><td class="mdescRight">request space to write input into <br/></td></tr>
<tr><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><td class="mdescLeft"> </td><td class="mdescRight">compute hash for current message, then restart for a new message <a href="#aa0b8c7a110d8968268fd02ec32b9a8e8"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a92752eebac10497211d7a065faba8725"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::Restart" ref="a92752eebac10497211d7a065faba8725" args="()" -->
virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a92752eebac10497211d7a065faba8725">Restart</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">discard the current state, and restart with a new message <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a5e847d65a38ec354de1b28cc4bc66a81"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::TagSize" ref="a5e847d65a38ec354de1b28cc4bc66a81" args="() const " -->
unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a5e847d65a38ec354de1b28cc4bc66a81">TagSize</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">same as <a class="el" href="class_hash_transformation.html#a9f42cc280bac76b884ad12615c0dabb5" title="size of the hash/digest/MAC returned by Final()">DigestSize()</a> <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab5507c62376f6bea41d53ae9544d0ff0"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::BlockSize" ref="ab5507c62376f6bea41d53ae9544d0ff0" args="() const " -->
virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#ab5507c62376f6bea41d53ae9544d0ff0">BlockSize</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">block size of underlying compression function, or 0 if not block based <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a981fce3f7d06c1f4ab2da853a1cf429d"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::OptimalBlockSize" ref="a981fce3f7d06c1f4ab2da853a1cf429d" args="() const " -->
virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a981fce3f7d06c1f4ab2da853a1cf429d">OptimalBlockSize</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">input to <a class="el" href="class_hash_transformation.html#aafabefaf445b65d3ba0d8e1c0294afe5" title="process more input">Update()</a> should have length a multiple of this for optimal speed <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad44c14bc654ba3be366da88e0a27f169"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::OptimalDataAlignment" ref="ad44c14bc654ba3be366da88e0a27f169" args="() const " -->
virtual unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#ad44c14bc654ba3be366da88e0a27f169">OptimalDataAlignment</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">returns how input should be aligned for optimal performance <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af8124c4fca23b74bbdc43660bdae692c"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::CalculateDigest" ref="af8124c4fca23b74bbdc43660bdae692c" args="(byte *digest, const byte *input, size_t length)" -->
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><td class="mdescLeft"> </td><td class="mdescRight">use this if your input is in one piece and you don't want to call <a class="el" href="class_hash_transformation.html#aafabefaf445b65d3ba0d8e1c0294afe5" title="process more input">Update()</a> and <a class="el" href="class_hash_transformation.html#aa0b8c7a110d8968268fd02ec32b9a8e8" title="compute hash for current message, then restart for a new message">Final()</a> separately <br/></td></tr>
<tr><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><td class="mdescLeft"> </td><td class="mdescRight">verify that digest is a valid digest for the current message, then reinitialize the object <a href="#a16c4aecd047015d513feef4ed5b929ba"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="acad96df68e70d922683e5063057130b2"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::VerifyDigest" ref="acad96df68e70d922683e5063057130b2" args="(const byte *digest, const byte *input, size_t length)" -->
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><td class="mdescLeft"> </td><td class="mdescRight">use this if your input is in one piece and you don't want to call <a class="el" href="class_hash_transformation.html#aafabefaf445b65d3ba0d8e1c0294afe5" title="process more input">Update()</a> and <a class="el" href="class_hash_transformation.html#a16c4aecd047015d513feef4ed5b929ba" title="verify that digest is a valid digest for the current message, then reinitialize the...">Verify()</a> separately <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0b6917657eaec935750fd83e28270d76"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::CalculateTruncatedDigest" ref="a0b6917657eaec935750fd83e28270d76" args="(byte *digest, size_t digestSize, const byte *input, size_t length)" -->
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><td class="mdescLeft"> </td><td class="mdescRight">truncated version of <a class="el" href="class_hash_transformation.html#af8124c4fca23b74bbdc43660bdae692c" title="use this if your input is in one piece and you don't want to call Update() and...">CalculateDigest()</a> <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0f6069eadf492d970c3eb8cdf656e742"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::TruncatedVerify" ref="a0f6069eadf492d970c3eb8cdf656e742" args="(const byte *digest, size_t digestLength)" -->
virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_hash_transformation.html#a0f6069eadf492d970c3eb8cdf656e742">TruncatedVerify</a> (const byte *digest, size_t digestLength)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">truncated version of <a class="el" href="class_hash_transformation.html#a16c4aecd047015d513feef4ed5b929ba" title="verify that digest is a valid digest for the current message, then reinitialize the...">Verify()</a> <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7958e99717019e8b9f91672bdfe9e086"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::VerifyTruncatedDigest" ref="a7958e99717019e8b9f91672bdfe9e086" args="(const byte *digest, size_t digestLength, const byte *input, size_t length)" -->
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><td class="mdescLeft"> </td><td class="mdescRight">truncated version of <a class="el" href="class_hash_transformation.html#acad96df68e70d922683e5063057130b2" title="use this if your input is in one piece and you don't want to call Update() and...">VerifyDigest()</a> <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="acd21c6715add4884fa043eaf51655039"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::AlgorithmName" ref="acd21c6715add4884fa043eaf51655039" args="() const " -->
virtual std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="class_algorithm.html#acd21c6715add4884fa043eaf51655039">AlgorithmName</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">returns name of this algorithm, not universally implemented yet <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a24b43349a71e1f98508eeb10b31a0a62"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::Clone" ref="a24b43349a71e1f98508eeb10b31a0a62" args="() const " -->
virtual <a class="el" href="class_clonable.html">Clonable</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_clonable.html#a24b43349a71e1f98508eeb10b31a0a62">Clone</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">this is not implemented by most classes yet <br/></td></tr>
<tr><td colspan="2"><h2>Public Attributes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a345bc33d413c1fd7669de9d9d1f089c2"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::m_recoverableMessage" ref="a345bc33d413c1fd7669de9d9d1f089c2" args="" -->
<a class="el" href="class_sec_block.html">SecByteBlock</a> </td><td class="memItemRight" valign="bottom"><b>m_recoverableMessage</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="abbef3e3ccb561a43b3ee7446c838a0da"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::m_representative" ref="abbef3e3ccb561a43b3ee7446c838a0da" args="" -->
<a class="el" href="class_sec_block.html">SecByteBlock</a> </td><td class="memItemRight" valign="bottom"><b>m_representative</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6f092d7793f35d6a38ed10bf83cdb781"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::m_presignature" ref="a6f092d7793f35d6a38ed10bf83cdb781" args="" -->
<a class="el" href="class_sec_block.html">SecByteBlock</a> </td><td class="memItemRight" valign="bottom"><b>m_presignature</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a80c5888ebcacfcdf50f950ebba950209"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::m_semisignature" ref="a80c5888ebcacfcdf50f950ebba950209" args="" -->
<a class="el" href="class_sec_block.html">SecByteBlock</a> </td><td class="memItemRight" valign="bottom"><b>m_semisignature</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aba062650b7094dadcf1168cd182f2486"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::m_k" ref="aba062650b7094dadcf1168cd182f2486" args="" -->
<a class="el" href="class_integer.html">Integer</a> </td><td class="memItemRight" valign="bottom"><b>m_k</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0886827aa3335610a8bb412e90744fd8"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::m_s" ref="a0886827aa3335610a8bb412e90744fd8" args="" -->
<a class="el" href="class_integer.html">Integer</a> </td><td class="memItemRight" valign="bottom"><b>m_s</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6d0a3ce0258e928c8fb146989a6a7884"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::m_empty" ref="a6d0a3ce0258e928c8fb146989a6a7884" args="" -->
bool </td><td class="memItemRight" valign="bottom"><b>m_empty</b></td></tr>
<tr><td colspan="2"><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a584846215692150d99d63f8b7ccd58d8"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::ThrowIfInvalidTruncatedSize" ref="a584846215692150d99d63f8b7ccd58d8" args="(size_t size) const " -->
void </td><td class="memItemRight" valign="bottom"><b>ThrowIfInvalidTruncatedSize</b> (size_t size) const </td></tr>
<tr><td colspan="2"><h2>Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a154db246b0eb9b9fd2c406b828d31c98"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::m_object" ref="a154db246b0eb9b9fd2c406b828d31c98" args="" -->
HASH_ALGORITHM </td><td class="memItemRight" valign="bottom"><b>m_object</b></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<h3>template<class HASH_ALGORITHM><br/>
class PK_MessageAccumulatorImpl< HASH_ALGORITHM ></h3>
<p>Definition at line <a class="el" href="pubkey_8h_source.html#l00302">302</a> of file <a class="el" href="pubkey_8h_source.html">pubkey.h</a>.</p>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a39b0a4c4cdc11fda358f9975b5e4137e"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::Ref" ref="a39b0a4c4cdc11fda358f9975b5e4137e" args="()" -->
<div class="memitem">
<div class="memproto">
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<td class="memname"><a class="el" href="class_hash_transformation.html">HashTransformation</a>& HashTransformation::Ref </td>
<td>(</td>
<td class="paramname"></td>
<td> ) </td>
<td><code> [inline, inherited]</code></td>
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</table>
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<div class="memdoc">
<p>return a reference to this object, </p>
<p>This function is useful for passing a temporary <a class="el" href="class_hash_transformation.html" title="interface for hash functions and data processing part of MACs">HashTransformation</a> object to a function that takes a non-const reference. </p>
<p>Definition at line <a class="el" href="cryptlib_8h_source.html#l00546">546</a> of file <a class="el" href="cryptlib_8h_source.html">cryptlib.h</a>.</p>
</div>
</div>
<a class="anchor" id="aa0b8c7a110d8968268fd02ec32b9a8e8"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::Final" ref="aa0b8c7a110d8968268fd02ec32b9a8e8" args="(byte *digest)" -->
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<td class="memname">virtual void HashTransformation::Final </td>
<td>(</td>
<td class="paramtype">byte * </td>
<td class="paramname"> <em>digest</em></td>
<td> ) </td>
<td><code> [inline, virtual, inherited]</code></td>
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</table>
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<div class="memdoc">
<p>compute hash for current message, then restart for a new message </p>
<dl class="pre"><dt><b>Precondition:</b></dt><dd>size of digest == <a class="el" href="class_hash_transformation.html#a9f42cc280bac76b884ad12615c0dabb5" title="size of the hash/digest/MAC returned by Final()">DigestSize()</a>. </dd></dl>
<p>Definition at line <a class="el" href="cryptlib_8h_source.html#l00556">556</a> of file <a class="el" href="cryptlib_8h_source.html">cryptlib.h</a>.</p>
<p>Referenced by <a class="el" href="pwdbased_8h_source.html#l00085">PKCS5_PBKDF2_HMAC< T >::DeriveKey()</a>, <a class="el" href="randpool_8cpp_source.html#l00026">RandomPool::IncorporateEntropy()</a>, and <a class="el" href="hmac_8cpp_source.html#l00067">HMAC_Base::TruncatedFinal()</a>.</p>
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<a class="anchor" id="a16c4aecd047015d513feef4ed5b929ba"></a><!-- doxytag: member="PK_MessageAccumulatorImpl::Verify" ref="a16c4aecd047015d513feef4ed5b929ba" args="(const byte *digest)" -->
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<td class="memname">virtual bool HashTransformation::Verify </td>
<td>(</td>
<td class="paramtype">const byte * </td>
<td class="paramname"> <em>digest</em></td>
<td> ) </td>
<td><code> [inline, virtual, inherited]</code></td>
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<p>verify that digest is a valid digest for the current message, then reinitialize the object </p>
<p>Default implementation is to call <a class="el" href="class_hash_transformation.html#aa0b8c7a110d8968268fd02ec32b9a8e8" title="compute hash for current message, then restart for a new message">Final()</a> and do a bitwise comparison between its output and digest. </p>
<p>Definition at line <a class="el" href="cryptlib_8h_source.html#l00586">586</a> of file <a class="el" href="cryptlib_8h_source.html">cryptlib.h</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="pubkey_8h_source.html">pubkey.h</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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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.1 </small></address>
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