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/*
//
//  Purpose:
//     Intel(R) Integrated Performance Primitives. Cryptography Primitives.
//     Internal EC over GF(p^m) basic Definitions & Function Prototypes
//
//     Context:
//        gfec_MulBasePoint()
//
*/

#include "owndefs.h"
#include "owncp.h"
#include "pcpgfpecstuff.h"
#include "gsscramble.h"

IppsGFpECPoint* gfec_MulBasePoint(IppsGFpECPoint* pR,
                            const BNU_CHUNK_T* pScalar, int scalarLen,
                            IppsGFpECState* pEC, Ipp8u* pScratchBuffer)
{
   FIX_BNU(pScalar, scalarLen);
   {
      gsModEngine* pGForder = ECP_MONT_R(pEC);

      BNU_CHUNK_T* pTmpScalar = cpGFpGetPool(1, pGForder); /* length of scalar does not exceed length of order */
      int orderBits = MOD_BITSIZE(pGForder);
      int orderLen  = MOD_LEN(pGForder);
      cpGFpElementCopyPadd(pTmpScalar,orderLen+1, pScalar,scalarLen);

      if(ECP_PREMULBP(pEC))
         gfec_base_point_mul(ECP_POINT_X(pR),
                             (Ipp8u*)pTmpScalar, orderBits,
                             pEC);
      else
         gfec_point_mul(ECP_POINT_X(pR), ECP_G(pEC),
                        (Ipp8u*)pTmpScalar, orderBits,
                        pEC, pScratchBuffer);
      cpGFpReleasePool(1, pGForder);

      ECP_POINT_FLAGS(pR) = gfec_IsPointAtInfinity(pR)? 0 : ECP_FINITE_POINT;
      return pR;
   }
}