C++程序  |  74行  |  2.88 KB

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/*
//     Intel(R) Integrated Performance Primitives. Cryptography Primitives.
//     Internal operations over prime GF(p).
//
//     Context:
//        cpGFpSet
//
*/
#include "owncp.h"

#include "pcpbn.h"
#include "pcpgfpstuff.h"

//tbcd: temporary excluded: #include <assert.h>

BNU_CHUNK_T* cpGFpSet(BNU_CHUNK_T* pElm, const BNU_CHUNK_T* pDataA, int nsA, gsModEngine* pGFE)
{
   const BNU_CHUNK_T* pModulus = GFP_MODULUS(pGFE);
   int elemLen = GFP_FELEN(pGFE);

   if(0 <= cpCmp_BNU(pDataA, nsA, pModulus, elemLen))
      return NULL;
   else {
      BNU_CHUNK_T* pTmp = cpGFpGetPool(1, pGFE);
      //tbcd: temporary excluded: assert(pTmp !=NULL);

      ZEXPAND_COPY_BNU(pTmp, elemLen, pDataA, nsA);
      GFP_METHOD(pGFE)->encode(pElm, pTmp, pGFE);

      cpGFpReleasePool(1, pGFE);
      return pElm;
   }
}