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/*
//     Intel(R) Integrated Performance Primitives. Cryptography Primitives.
//     Internal operations over GF(p) extension.
// 
//     Context:
//        cpGFpxRand()
//
*/

#include "owncp.h"
#include "pcpbnumisc.h"
#include "pcpgfpxstuff.h"
#include "gsscramble.h"


BNU_CHUNK_T* cpGFpxRand(BNU_CHUNK_T* pR, gsModEngine* pGFEx, IppBitSupplier rndFunc, void* pRndParam)
{
   if( GFP_IS_BASIC(pGFEx) )
      return cpGFpRand(pR, pGFEx, rndFunc, pRndParam);

   else {
      gsModEngine* pBasicGFE = cpGFpBasic(pGFEx);
      int basicElemLen = GFP_FELEN(pBasicGFE);
      int basicDeg = cpGFpBasicDegreeExtension(pGFEx);

      BNU_CHUNK_T* pTmp = pR;
      int deg;
      for(deg=0; deg<basicDeg; deg++) {
         if(NULL == cpGFpRand(pTmp, pBasicGFE, rndFunc, pRndParam))
            break;
         pTmp += basicElemLen;
      }
      return deg==basicDeg? pR : NULL;
   }
}