ext/ipp/sources/ippcp/pcpgfpmul.c

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/* 
//     Intel(R) Integrated Performance Primitives. Cryptography Primitives.
//     Operations over GF(p).
// 
//     Context:
//        ippsGFpMul()
// 
*/
#include "owndefs.h"
#include "owncp.h"

#include "pcpgfpstuff.h"
#include "pcpgfpxstuff.h"
#include "pcphash.h"
#include "pcphash_rmf.h"
#include "pcptool.h"


/*F*
// Name: ippsGFpMul
//
// Purpose: Multiply of GF elements
//
// Returns:                   Reason:
//    ippStsNullPtrErr              NULL == pGFp
//                                  NULL == pA
//                                  NULL == pR
//                                  NULL == pB
//
//    ippStsContextMatchErr         invalid pGFp->idCtx
//                                  invalid pA->idCtx
//                                  invalid pR->idCtx
//                                  invalid pB->idCtx
//
//    ippStsOutOfRangeErr           GFPE_ROOM() != GFP_FELEN()
//
//    ippStsNoErr                   no error
//
// Parameters:
//    pA         Pointer to the context of the first finite field element.
//    pB         Pointer to the context of the second finite field element.
//    pR         Pointer to the context of the result finite field element.
//    pGFp       Pointer to the context of the finite field.
//
*F*/

IPPFUN(IppStatus, ippsGFpMul,(const IppsGFpElement* pA, const IppsGFpElement* pB,
                                    IppsGFpElement* pR, IppsGFpState* pGFp))
{
   IPP_BAD_PTR4_RET(pA, pB, pR, pGFp);
   pGFp = (IppsGFpState*)( IPP_ALIGNED_PTR(pGFp, GFP_ALIGNMENT) );
   IPP_BADARG_RET( !GFP_TEST_ID(pGFp), ippStsContextMatchErr );
   IPP_BADARG_RET( !GFPE_TEST_ID(pA), ippStsContextMatchErr );
   IPP_BADARG_RET( !GFPE_TEST_ID(pB), ippStsContextMatchErr );
   IPP_BADARG_RET( !GFPE_TEST_ID(pR), ippStsContextMatchErr );
   {
      gsModEngine* pGFE = GFP_PMA(pGFp);
      IPP_BADARG_RET( (GFPE_ROOM(pA)!=GFP_FELEN(pGFE)) || (GFPE_ROOM(pB)!=GFP_FELEN(pGFE)) || (GFPE_ROOM(pR)!=GFP_FELEN(pGFE)), ippStsOutOfRangeErr);

      GFP_METHOD(pGFE)->mul(GFPE_DATA(pR), GFPE_DATA(pA), GFPE_DATA(pB),pGFE);
      return ippStsNoErr;
   }
}