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/* 
// 
//  Purpose:
//     Cryptography Primitive.
//     Digesting message according to SHA1
// 
//  Contents:
//        ippsSHA1MessageDigest()
//
*/

#include "owndefs.h"
#include "owncp.h"
#include "pcphash.h"
#include "pcphash_rmf.h"
#include "pcptool.h"
#include "pcpsha1stuff.h"

/*F*
//    Name: ippsSHA1MessageDigest
//
// Purpose: Digest of the whole message.
//
// Returns:                Reason:
//    ippStsNullPtrErr        pMsg == NULL
//                            pMD == NULL
//    ippStsLengthErr         len <0
//    ippStsNoErr             no errors
//
// Parameters:
//    pMsg        pointer to the input message
//    len         input message length
//    pMD         address of the output digest
//
*F*/
IPPFUN(IppStatus, ippsSHA1MessageDigest,(const Ipp8u* pMsg, int len, Ipp8u* pMD))
{
   /* test digest pointer */
   IPP_BAD_PTR1_RET(pMD);
   /* test message length */
   IPP_BADARG_RET((len<0), ippStsLengthErr);
   /* test message pointer */
   IPP_BADARG_RET((len && !pMsg), ippStsNullPtrErr);

   {
      /* select processing function */
      #if (_SHA_NI_ENABLING_==_FEATURE_ON_)
      cpHashProc updateFunc = UpdateSHA1ni;
      #elif (_SHA_NI_ENABLING_==_FEATURE_TICKTOCK_)
      cpHashProc updateFunc = IsFeatureEnabled(ippCPUID_SHA)? UpdateSHA1ni : UpdateSHA1;
      #else
      cpHashProc updateFunc = UpdateSHA1;
      #endif

      /* message length in the multiple MBS and the rest */
      int msgLenBlks = len & (-MBS_SHA1);
      int msgLenRest = len - msgLenBlks;

      /* init hash */
      ((Ipp32u*)(pMD))[0] = sha1_iv[0];
      ((Ipp32u*)(pMD))[1] = sha1_iv[1];
      ((Ipp32u*)(pMD))[2] = sha1_iv[2];
      ((Ipp32u*)(pMD))[3] = sha1_iv[3];
      ((Ipp32u*)(pMD))[4] = sha1_iv[4];

      /* process main part of the message */
      if(msgLenBlks) {
         updateFunc((Ipp32u*)pMD, pMsg, msgLenBlks, sha1_cnt);
         pMsg += msgLenBlks;
      }

      cpFinalizeSHA1((Ipp32u*)pMD, pMsg, msgLenRest, len);
      ((Ipp32u*)pMD)[0] = ENDIANNESS32(((Ipp32u*)pMD)[0]);
      ((Ipp32u*)pMD)[1] = ENDIANNESS32(((Ipp32u*)pMD)[1]);
      ((Ipp32u*)pMD)[2] = ENDIANNESS32(((Ipp32u*)pMD)[2]);
      ((Ipp32u*)pMD)[3] = ENDIANNESS32(((Ipp32u*)pMD)[3]);
      ((Ipp32u*)pMD)[4] = ENDIANNESS32(((Ipp32u*)pMD)[4]);

      return ippStsNoErr;
   }
}