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     40 
     41 /*
     42 //
     43 //  Purpose:
     44 //     Intel(R) Integrated Performance Primitives. Cryptography Primitives.
     45 //     EC over GF(p) Operations
     46 //
     47 //     Context:
     48 //        ippsGFpECAddPoint()
     49 //
     50 */
     51 
     52 #include "owndefs.h"
     53 #include "owncp.h"
     54 #include "pcpgfpecstuff.h"
     55 #include "pcphash.h"
     56 #include "pcphash_rmf.h"
     57 
     58 /*F*
     59 // Name: ippsGFpECAddPoint
     60 //
     61 // Purpose: Computes the sum of two points on an elliptic curve
     62 //
     63 // Returns:                   Reason:
     64 //    ippStsNullPtrErr               pP == NULL
     65 //                                   pQ == NULL
     66 //                                   pR == NULL
     67 //                                   pEC == NULL
     68 //
     69 //    ippStsContextMatchErr          invalid pEC->idCtx
     70 //                                   invalid pP->idCtx
     71 //                                   invalid pQ->idCtx
     72 //                                   invalid pR->idCtx
     73 //
     74 //    ippStsOutOfRangeErr            ECP_POINT_FELEN(pP)!=GFP_FELEN()
     75 //                                   ECP_POINT_FELEN(pQ)!=GFP_FELEN()
     76 //                                   ECP_POINT_FELEN(pR)!=GFP_FELEN()
     77 //
     78 //    ippStsNoErr                    no error
     79 //
     80 // Parameters:
     81 //    pP              Pointer to the context of the first elliptic curve point
     82 //    pQ              Pointer to the context of the second elliptic curve point
     83 //    pR              Pointer to the context of the resulting elliptic curve point
     84 //    pEC             Pointer to the context of the elliptic curve
     85 //
     86 *F*/
     87 
     88 IPPFUN(IppStatus, ippsGFpECAddPoint,(const IppsGFpECPoint* pP, const IppsGFpECPoint* pQ, IppsGFpECPoint* pR,
     89                   IppsGFpECState* pEC))
     90 {
     91    IPP_BAD_PTR4_RET(pP, pQ, pR, pEC);
     92    pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
     93    IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr );
     94    IPP_BADARG_RET( !ECP_POINT_TEST_ID(pP), ippStsContextMatchErr );
     95    IPP_BADARG_RET( !ECP_POINT_TEST_ID(pQ), ippStsContextMatchErr );
     96    IPP_BADARG_RET( !ECP_POINT_TEST_ID(pR), ippStsContextMatchErr );
     97 
     98    IPP_BADARG_RET( ECP_POINT_FELEN(pP)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr);
     99    IPP_BADARG_RET( ECP_POINT_FELEN(pQ)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr);
    100    IPP_BADARG_RET( ECP_POINT_FELEN(pR)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr);
    101 
    102    if(pP==pQ)
    103       gfec_DblPoint(pR, pP, pEC);
    104    else
    105       gfec_AddPoint(pR, pP, pQ, pEC);
    106    return ippStsNoErr;
    107 }
    108