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/* 
// 
//  Purpose:
//     Cryptography Primitive.
//     Security Hash Standard
//     General Functionality
// 
//  Contents:
//        cpReInitHash()
//
*/

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

/*F*
//    Name: ippsHashInit
//
// Purpose: Init Hash state.
//
// Returns:                Reason:
//    ippStsNullPtrErr           pState == NULL
//    ippStsNotSupportedModeErr  if algID is not match to supported hash alg
//    ippStsNoErr                no errors
//
// Parameters:
//    pCtx     pointer to the Hash state
//    algID    hash alg ID
//
*F*/
int cpReInitHash(IppsHashState* pCtx, IppHashAlgId algID)
{
   int hashIvSize = cpHashIvSize(algID);
   const Ipp8u* iv = cpHashIV[algID];

   HASH_LENLO(pCtx) = CONST_64(0);
   HASH_LENHI(pCtx) = CONST_64(0);
   HAHS_BUFFIDX(pCtx) = 0;
   CopyBlock(iv, HASH_VALUE(pCtx), hashIvSize);

   return hashIvSize;
}