#include?“sha256.h“

///?same?as?reset（）
SHA256::SHA256（）
{
??reset（）;
}

///?restart
void?SHA256::reset（）
{
??m_numBytes???=?0;
??m_bufferSize?=?0;

??//?according?to?RFC?1321
??m_hash[0]?=?0x6a09e667;
??m_hash[1]?=?0xbb67ae85;
??m_hash[2]?=?0x3c6ef372;
??m_hash[3]?=?0xa54ff53a;
??m_hash[4]?=?0x510e527f;
??m_hash[5]?=?0x9b05688c;
??m_hash[6]?=?0x1f83d9ab;
??m_hash[7]?=?0x5be0cd19;
}

namespace
{
??inline?uint32_t?rotate（uint32_t?a?uint32_t?c）
??{
????return?（a?>>?c）?|?（a?<??}

??inline?uint32_t?swap（uint32_t?x）
??{
	return?_byteswap_ulong（x）;
??}

??//?mix?functions?for?processBlock（）
??inline?uint32_t?f1（uint32_t?e?uint32_t?f?uint32_t?g）
??{
????uint32_t?term1?=?rotate（e?6）?^?rotate（e?11）?^?rotate（e?25）;
????uint32_t?term2?=?（e?&?f）?^?（~e?&?g）;?//（g?^?（e?&?（f?^?g）））
????return?term1?+?term2;
??}

??inline?uint32_t?f2（uint32_t?a?uint32_t?b?uint32_t?c）
??{
????uint32_t?term1?=?rotate（a?2）?^?rotate（a?13）?^?rotate（a?22）;
????uint32_t?term2?=?（（a?|?b）?&?c）?|?（a?&?b）;?//（a?&?（b?^?c））?^?（b?&?c）;
????return?term1?+?term2;
??}
}


///?process?64?bytes
void?SHA256::processBlock（const?void*?data）
{
??//?get?last?hash
??uint32_t?a?=?m_hash[0];
??uint32_t?b?=?m_hash[1];
??uint32_t?c?=?m_hash[2];
??uint32_t?d?=?m_hash[3];
??uint32_t?e?=?m_hash[4];
??uint32_t?f?=?m_hash[5];
??uint32_t?g?=?m_hash[6];
??uint32_t?h?=?m_hash[7];

??//?data?represented?as?16x?32-bit?words
??const?uint32_t*?input?=?（uint32_t*）?data;
??//?convert?to?big?endian
??uint32_t?words[64];
??int?i;
??for?（i?=?0;?i?#if?defined（__BYTE_ORDER）?&&?（__BYTE_ORDER?!=?0）?&&?（__BYTE_ORDER?==?__BIG_ENDIAN）
????words[i]?=??????input[i];
#else
????words[i]?=?swap（input[i]）;
#endif

??uint32_t?xy;?//?temporaries

??//?first?round
??x?=?h?+?f1（efg）?+?0x428a2f98?+?words[?0];?y?=?f2（abc）;?d?+=?x;?h?=?x?+?y;
??x?=?g?+?f1（def）?+?0x71374491?+?words[?1];?y?=?f2（hab）;?c?+=?x;?g?=?x?+?y;
??x?=?f?+?f1（cde）?+?0xb5c0fbcf?+?words[?2];?y?=?f2（gha）;?b?+=?x;?f?=?x?+?y;
??x?=?e?+?f1（bcd）?+?0xe9b5dba5?+?words[?3];?y?=?f2（fgh）;?a?+=?x;?e?=?x?+?y;
??x?=?d?+?f1（abc）?+?0x3956c25b?+?words[?4];?y?=?f2（efg）;?h?+=?x;?d?=?x?+?y;
??x?=?c?+?f1（hab）?+?0x59f111f1?+?words[?5];?y?=?f2（def）;?g?+=?x;?c?=?x?+?y;
??x?=?b?+?f1（gha）?+?0x923f82a4?+?words[?6];?y?=?f2（cde）;?f?+=?x;?b?=?x?+?y;
??x?=?a?+?f1（fgh）?+?0xab1c5ed5?+?words[?7];?y?=?f2（bcd）;?e?+=?x;?a?=?x?+?y;

??//?secound?round
??x?=?h?+?f1（efg）?+?0xd807aa98?+?words[?8];?y?=?f2（abc）;?d?+=?x;?h?=?x?+?y;
??x?=?g?+?f1（def）?+?0x12835b01?+?words[?9];?y?=?f2（hab）;?c?+=?x;?g?=?x?+?y;
??x?=?f?+?f1（cde）?+?0x243185be?+?words[10];?y?=?f2（gha）;?b?+=?x;?f?=?x?+?y;
??x?=?e?+?f1（bcd）?+?0x550c7dc3?+?words[11];?y?=?f2（fgh）;?a?+=?x;?e?=?x?+?y;
??x?=?d?+?f1（abc）?+?0x72be5d74?+?words[12];?y?=?f2（efg）;?h?+=?x;?d?=?x?+?y;
??x?=?c?+?f1（hab）?+?0x80deb1fe?+?words[13];?y?=?f2（def）;?g?+=?x;?c?=?x?+?y;
??x?=?b?+?f1（gha）?+?0x9bdc06a7?+?words[14];?y?=?f2（cde）;?f?+=?x;?b?=?x?+?y;
??x?=?a?+?f1（fgh）?+?0xc19bf174?+?words[15

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-05-31?14:54??testsha256\
?????目錄???????????0??2016-05-31?14:35??testsha256\Debug\
?????文件???????85504??2016-05-31?14:53??testsha256\Debug\testsha256.exe
?????文件??????578048??2016-05-31?14:53??testsha256\Debug\testsha256.ilk
?????文件?????1126400??2016-05-31?14:53??testsha256\Debug\testsha256.pdb
?????目錄???????????0??2016-05-31?14:53??testsha256\testsha256\
?????目錄???????????0??2016-05-31?14:53??testsha256\testsha256\Debug\
?????文件??????174855??2016-05-31?14:52??testsha256\testsha256\Debug\sha256.obj
?????文件???????11147??2016-05-31?14:35??testsha256\testsha256\Debug\stdafx.obj
?????文件????????1445??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.log
?????文件??????159772??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.obj
?????文件?????2162688??2016-05-31?14:35??testsha256\testsha256\Debug\testsha256.pch
?????目錄???????????0??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.tlog\
?????文件???????27858??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.tlog\CL.read.1.tlog
?????文件????????1980??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.tlog\CL.write.1.tlog
?????文件????????1940??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.tlog\cl.command.1.tlog
?????文件????????1442??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.tlog\link.command.1.tlog
?????文件????????3044??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.tlog\link.read.1.tlog
?????文件?????????674??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.tlog\link.write.1.tlog
?????文件?????????163??2016-05-31?14:53??testsha256\testsha256\Debug\testsha256.tlog\testsha256.lastbuildstate
?????文件??????371712??2016-05-31?14:53??testsha256\testsha256\Debug\vc120.idb
?????文件??????430080??2016-05-31?14:53??testsha256\testsha256\Debug\vc120.pdb
?????文件????????1531??2016-05-31?14:26??testsha256\testsha256\ReadMe.txt
?????文件???????13115??2016-05-31?14:51??testsha256\testsha256\sha256.cpp
?????文件????????1247??2016-05-31?14:50??testsha256\testsha256\sha256.h
?????文件?????????216??2016-05-31?14:26??testsha256\testsha256\stdafx.cpp
?????文件?????????234??2016-05-31?14:26??testsha256\testsha256\stdafx.h
?????文件?????????236??2016-05-31?14:26??testsha256\testsha256\targetver.h
?????文件?????????346??2016-05-31?14:53??testsha256\testsha256\testsha256.cpp
?????文件????????4631??2016-05-31?14:35??testsha256\testsha256\testsha256.vcxproj
?????文件????????1495??2016-05-31?14:34??testsha256\testsha256\testsha256.vcxproj.filters
............此處省略3個文件信息