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<a href="#pub-types">Public Types</a> |
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<div class="title">SHA256 Class Reference</div> </div>
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<!-- doxytag: class="SHA256" --><!-- doxytag: inherits="IteratedHashWithStaticTransform< word32, BigEndian, 64, 32, SHA256, 32, true >" -->
<p>implements the SHA-256 standard
<a href="class_s_h_a256.html#details">More...</a></p>
<p><code>#include <<a class="el" href="sha_8h_source.html">sha.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for SHA256:</div>
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<img src="class_s_h_a256.png" usemap="#SHA256_map" alt=""/>
<map id="SHA256_map" name="SHA256_map">
<area href="class_iterated_hash_with_static_transform.html" alt="IteratedHashWithStaticTransform< word32, BigEndian, 64, 32, SHA256, 32, true >" shape="rect" coords="0,392,600,416"/>
<area href="class_clonable_impl.html" alt="ClonableImpl< SHA256, AlgorithmImpl< IteratedHash< word32, BigEndian, T_BlockSize >, SHA256 > >" shape="rect" coords="0,336,600,360"/>
<area href="class_algorithm_impl.html" alt="AlgorithmImpl< IteratedHash< word32, BigEndian, T_BlockSize >, SHA256 >" shape="rect" coords="0,280,600,304"/>
<area href="class_iterated_hash.html" alt="IteratedHash< word32, BigEndian, T_BlockSize >" shape="rect" coords="0,224,600,248"/>
<area href="class_iterated_hash_base.html" alt="IteratedHashBase< word32, HashTransformation >" shape="rect" coords="0,168,600,192"/>
<area href="class_hash_transformation.html" title="interface for hash functions and data processing part of MACs" alt="HashTransformation" shape="rect" coords="0,112,600,136"/>
<area href="class_algorithm.html" title="interface for all crypto algorithms" alt="Algorithm" shape="rect" coords="0,56,600,80"/>
<area href="class_clonable.html" title="interface for cloning objects, this is not implemented by most classes yet" alt="Clonable" shape="rect" coords="0,0,600,24"/>
</map>
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<p><a href="class_s_h_a256-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6ec15728121293aef70ca8b30b2e7e7a"></a><!-- doxytag: member="SHA256::ByteOrderClass" ref="a6ec15728121293aef70ca8b30b2e7e7a" args="" -->
typedef <a class="el" href="struct_enum_to_type.html">BigEndian</a> </td><td class="memItemRight" valign="bottom"><b>ByteOrderClass</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ace0350088eea8679cbe23668d2498c07"></a><!-- doxytag: member="SHA256::HashWordType" ref="ace0350088eea8679cbe23668d2498c07" args="" -->
typedef word32 </td><td class="memItemRight" valign="bottom"><b>HashWordType</b></td></tr>
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a176f8dcb7ea9818cd54e8f6df8bca50a"></a><!-- doxytag: member="SHA256::DigestSize" ref="a176f8dcb7ea9818cd54e8f6df8bca50a" args="() const" -->
unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_iterated_hash_with_static_transform.html#a176f8dcb7ea9818cd54e8f6df8bca50a">DigestSize</a> () const</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">size of the hash/digest/MAC returned by <a class="el" href="class_hash_transformation.html#aa0b8c7a110d8968268fd02ec32b9a8e8" title="compute hash for current message, then restart for a new message">Final()</a> <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a8aa4807d12b2c4653d2d6c69f3c51f53"></a><!-- doxytag: member="SHA256::Clone" ref="a8aa4807d12b2c4653d2d6c69f3c51f53" args="() const" -->
<a class="el" href="class_clonable.html">Clonable</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_clonable_impl.html#a8aa4807d12b2c4653d2d6c69f3c51f53">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 class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9d6e3714fc32c36789147d9f3b627eeb"></a><!-- doxytag: member="SHA256::AlgorithmName" ref="a9d6e3714fc32c36789147d9f3b627eeb" args="() const" -->
std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="class_algorithm_impl.html#a9d6e3714fc32c36789147d9f3b627eeb">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="a272b3589e2f6648da8d4caa8603397dd"></a><!-- doxytag: member="SHA256::BlockSize" ref="a272b3589e2f6648da8d4caa8603397dd" args="() const" -->
unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_iterated_hash.html#a272b3589e2f6648da8d4caa8603397dd">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="ab36955b4beefcf630a120f1b3b261dc7"></a><!-- doxytag: member="SHA256::GetByteOrder" ref="ab36955b4beefcf630a120f1b3b261dc7" args="() const" -->
ByteOrder </td><td class="memItemRight" valign="bottom"><b>GetByteOrder</b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad8ba3e6b25afbdf84f177b965229c0d9"></a><!-- doxytag: member="SHA256::OptimalBlockSize" ref="ad8ba3e6b25afbdf84f177b965229c0d9" args="() const" -->
unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_iterated_hash_base.html#ad8ba3e6b25afbdf84f177b965229c0d9">OptimalBlockSize</a> () const</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">input to Update() 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="a9ee30253981d13564bf0d2ffa33dfc25"></a><!-- doxytag: member="SHA256::OptimalDataAlignment" ref="a9ee30253981d13564bf0d2ffa33dfc25" args="() const" -->
unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_iterated_hash_base.html#a9ee30253981d13564bf0d2ffa33dfc25">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="a3202914349a18f79facb605d75f0d10c"></a><!-- doxytag: member="SHA256::Update" ref="a3202914349a18f79facb605d75f0d10c" args="(const byte *input, size_t length)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_iterated_hash_base.html#a3202914349a18f79facb605d75f0d10c">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="a816fce9e3cab60c1c4ecef77a321be96"></a><!-- doxytag: member="SHA256::CreateUpdateSpace" ref="a816fce9e3cab60c1c4ecef77a321be96" args="(size_t &size)" -->
byte * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_iterated_hash_base.html#a816fce9e3cab60c1c4ecef77a321be96">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"><a class="anchor" id="ad53da712634ea213ad047b2a68b0fe70"></a><!-- doxytag: member="SHA256::Restart" ref="ad53da712634ea213ad047b2a68b0fe70" args="()" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_iterated_hash_base.html#ad53da712634ea213ad047b2a68b0fe70">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="a2fb87191e0a4359fb9e81c71f99db600"></a><!-- doxytag: member="SHA256::TruncatedFinal" ref="a2fb87191e0a4359fb9e81c71f99db600" args="(byte *digest, size_t size)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_iterated_hash_base.html#a2fb87191e0a4359fb9e81c71f99db600">TruncatedFinal</a> (byte *digest, size_t size)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">truncated version of <a class="el" href="class_hash_transformation.html#aa0b8c7a110d8968268fd02ec32b9a8e8" title="compute hash for current message, then restart for a new message">Final()</a> <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a39b0a4c4cdc11fda358f9975b5e4137e"></a><!-- doxytag: member="SHA256::Ref" ref="a39b0a4c4cdc11fda358f9975b5e4137e" args="()" -->
<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, useful for passing a temporary object to a function that takes a non-const reference <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="a5e847d65a38ec354de1b28cc4bc66a81"></a><!-- doxytag: member="SHA256::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="af8124c4fca23b74bbdc43660bdae692c"></a><!-- doxytag: member="SHA256::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="SHA256::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 object...">Verify()</a> separately <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0b6917657eaec935750fd83e28270d76"></a><!-- doxytag: member="SHA256::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 Final() separately...">CalculateDigest()</a> <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0f6069eadf492d970c3eb8cdf656e742"></a><!-- doxytag: member="SHA256::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 object...">Verify()</a> <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7958e99717019e8b9f91672bdfe9e086"></a><!-- doxytag: member="SHA256::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 Verify() separately...">VerifyDigest()</a> <br/></td></tr>
<tr><td colspan="2"><h2><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a10038115312a04ab87f043355d421a35"></a><!-- doxytag: member="SHA256::InitState" ref="a10038115312a04ab87f043355d421a35" args="(HashWordType *state)" -->
static void </td><td class="memItemRight" valign="bottom"><b>InitState</b> (HashWordType *state)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a791c4046e1a25a129949366736a623cd"></a><!-- doxytag: member="SHA256::Transform" ref="a791c4046e1a25a129949366736a623cd" args="(word32 *digest, const word32 *data)" -->
static void </td><td class="memItemRight" valign="bottom"><b>Transform</b> (word32 *digest, const word32 *data)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a1a2fab5952e49475144085ff3ada8754"></a><!-- doxytag: member="SHA256::StaticAlgorithmName" ref="a1a2fab5952e49475144085ff3ada8754" 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="a394a6ed0dd2a885652cd203ad4fa5fe0"></a><!-- doxytag: member="SHA256::CorrectEndianess" ref="a394a6ed0dd2a885652cd203ad4fa5fe0" args="(HashWordType *out, const HashWordType *in, size_t byteCount)" -->
static void </td><td class="memItemRight" valign="bottom"><b>CorrectEndianess</b> (HashWordType *out, const HashWordType *in, size_t byteCount)</td></tr>
<tr><td colspan="2"><h2><a name="pub-static-attribs"></a>
Static Public Attributes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a831ce938457903dd07efb54bc144ae6b"></a><!-- doxytag: member="SHA256::DIGESTSIZE" ref="a831ce938457903dd07efb54bc144ae6b" args="" -->
static const int </td><td class="memItemRight" valign="bottom"><b>DIGESTSIZE</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ac5b97a3f0d607c914d025581e0ecf80e"></a><!-- doxytag: member="SHA256::BLOCKSIZE" ref="ac5b97a3f0d607c914d025581e0ecf80e" 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="a66e54da4b22f08f90e4df56fc486c0cc"></a><!-- doxytag: member="SHA256::cryptopp_assert___LINE__" ref="a66e54da4b22f08f90e4df56fc486c0cc" args="" -->
static <a class="el" href="struct_compile_assert.html">CompileAssert</a><br class="typebreak"/>
<((T_BlockSize &(T_BlockSize-1))==0)> </td><td class="memItemRight" valign="bottom"><b>cryptopp_assert___LINE__</b></td></tr>
<tr><td colspan="2"><h2><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7e9c0d5d95a68679254b3171497f156b"></a><!-- doxytag: member="SHA256::HashEndianCorrectedBlock" ref="a7e9c0d5d95a68679254b3171497f156b" args="(const word32 *data)" -->
void </td><td class="memItemRight" valign="bottom"><b>HashEndianCorrectedBlock</b> (const word32 *data)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3d2a82447c194cd8b2a08235ecede525"></a><!-- doxytag: member="SHA256::Init" ref="a3d2a82447c194cd8b2a08235ecede525" args="()" -->
void </td><td class="memItemRight" valign="bottom"><b>Init</b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a4b472107b2264adddea33edab8b4dbc6"></a><!-- doxytag: member="SHA256::StateBuf" ref="a4b472107b2264adddea33edab8b4dbc6" args="()" -->
word32 * </td><td class="memItemRight" valign="bottom"><b>StateBuf</b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aa7561b749600677c9a28bcf4d943e272"></a><!-- doxytag: member="SHA256::DataBuf" ref="aa7561b749600677c9a28bcf4d943e272" args="()" -->
word32 * </td><td class="memItemRight" valign="bottom"><b>DataBuf</b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a33a8299a01976e215362f093589b9f6e"></a><!-- doxytag: member="SHA256::GetBitCountHi" ref="a33a8299a01976e215362f093589b9f6e" args="() const" -->
word32 </td><td class="memItemRight" valign="bottom"><b>GetBitCountHi</b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a5fe17f6b8a18b047349b31931baa5965"></a><!-- doxytag: member="SHA256::GetBitCountLo" ref="a5fe17f6b8a18b047349b31931baa5965" args="() const" -->
word32 </td><td class="memItemRight" valign="bottom"><b>GetBitCountLo</b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a01f39339fa69510303ad401245df1037"></a><!-- doxytag: member="SHA256::PadLastBlock" ref="a01f39339fa69510303ad401245df1037" args="(unsigned int lastBlockSize, byte padFirst=0x80)" -->
void </td><td class="memItemRight" valign="bottom"><b>PadLastBlock</b> (unsigned int lastBlockSize, byte padFirst=0x80)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a8127a31f5c7700602a34e78285f53e57"></a><!-- doxytag: member="SHA256::HashMultipleBlocks" ref="a8127a31f5c7700602a34e78285f53e57" args="(const word32 *input, size_t length)" -->
virtual size_t </td><td class="memItemRight" valign="bottom"><b>HashMultipleBlocks</b> (const word32 *input, size_t length)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af4f5349f8ebacfde64bb24f2ce758775"></a><!-- doxytag: member="SHA256::HashBlock" ref="af4f5349f8ebacfde64bb24f2ce758775" args="(const HashWordType *input)" -->
void </td><td class="memItemRight" valign="bottom"><b>HashBlock</b> (const HashWordType *input)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a584846215692150d99d63f8b7ccd58d8"></a><!-- doxytag: member="SHA256::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><a name="pro-attribs"></a>
Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a34a7b32751931968c8b86cf1630a6381"></a><!-- doxytag: member="SHA256::m_state" ref="a34a7b32751931968c8b86cf1630a6381" args="" -->
<a class="el" href="class_fixed_size_aligned_sec_block.html">FixedSizeAlignedSecBlock</a><br class="typebreak"/>
< word32, T_BlockSize/sizeof(word32), <br class="typebreak"/>
T_StateAligned > </td><td class="memItemRight" valign="bottom"><b>m_state</b></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad1d059e2cba2115f403befa9e6c070da"></a><!-- doxytag: member="SHA256::m_data" ref="ad1d059e2cba2115f403befa9e6c070da" args="" -->
<a class="el" href="class_fixed_size_sec_block.html">FixedSizeSecBlock</a>< word32, <br class="typebreak"/>
T_BlockSize/sizeof(word32)> </td><td class="memItemRight" valign="bottom"><b>m_data</b></td></tr>
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<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>implements the SHA-256 standard </p>
<p>Definition at line <a class="el" href="sha_8h_source.html#l00020">20</a> of file <a class="el" href="sha_8h_source.html">sha.h</a>.</p>
</div><hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="aa0b8c7a110d8968268fd02ec32b9a8e8"></a><!-- doxytag: member="SHA256::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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<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#l00545">545</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#l00086">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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</div>
<a class="anchor" id="a16c4aecd047015d513feef4ed5b929ba"></a><!-- doxytag: member="SHA256::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#l00575">575</a> of file <a class="el" href="cryptlib_8h_source.html">cryptlib.h</a>.</p>
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</div>
<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="sha_8h_source.html">sha.h</a></li>
<li><a class="el" href="sha_8cpp_source.html">sha.cpp</a></li>
</ul>
</div>
<hr class="footer"/><address class="footer"><small>Generated on Sun Oct 16 2011 for Crypto++ by 
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.4 </small></address>
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