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     40 
     41 /*
     42 //
     43 //  Purpose:
     44 //     Cryptography Primitive.
     45 //     Digesting message according to SHA256
     46 //
     47 //  Contents:
     48 //     cpFinalizeSHA256()
     49 //
     50 //
     51 */
     52 
     53 #include "owndefs.h"
     54 #include "owncp.h"
     55 #include "pcphash.h"
     56 #include "pcphash_rmf.h"
     57 #include "pcptool.h"
     58 #include "pcpsha256stuff.h"
     59 
     60 void cpFinalizeSHA256(DigestSHA256 pHash, const Ipp8u* inpBuffer, int inpLen, Ipp64u processedMsgLen)
     61 {
     62    /* select processing  function */
     63    #if (_SHA_NI_ENABLING_==_FEATURE_ON_)
     64    cpHashProc updateFunc = UpdateSHA256ni;
     65    #elif (_SHA_NI_ENABLING_==_FEATURE_TICKTOCK_)
     66    cpHashProc updateFunc = IsFeatureEnabled(ippCPUID_SHA)? UpdateSHA256ni : UpdateSHA256;
     67    #else
     68    cpHashProc updateFunc = UpdateSHA256;
     69    #endif
     70 
     71    /* local buffer and it length */
     72    Ipp8u buffer[MBS_SHA256*2];
     73    int bufferLen = inpLen < (MBS_SHA256-(int)MLR_SHA256)? MBS_SHA256 : MBS_SHA256*2;
     74 
     75    /* copy rest of message into internal buffer */
     76    CopyBlock(inpBuffer, buffer, inpLen);
     77 
     78    /* padd message */
     79    buffer[inpLen++] = 0x80;
     80    PaddBlock(0, buffer+inpLen, bufferLen-inpLen-MLR_SHA256);
     81 
     82    /* put processed message length in bits */
     83    processedMsgLen = ENDIANNESS64(processedMsgLen<<3);
     84    ((Ipp64u*)(buffer+bufferLen))[-1] = processedMsgLen;
     85 
     86    /* copmplete hash computation */
     87    updateFunc(pHash, buffer, bufferLen, sha256_cnt);
     88 }