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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 //        ippsGFpECPointGetSize()
     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: ippsGFpECPointGetSize
     60 //
     61 // Purpose: Gets the size of the IppsGFpECPoint context
     62 //
     63 // Returns:                   Reason:
     64 //    ippStsNullPtrErr          pEC == NULL
     65 //                              pSize == NULL
     66 //
     67 //    ippStsContextMatchErr     invalid pEC->idCtx
     68 //
     69 //    ippStsNoErr               no error
     70 //
     71 // Parameters:
     72 //    pEC             Pointer to the context of the elliptic curve
     73 //    pSize           Pointer to the buffer size
     74 //
     75 *F*/
     76 
     77 IPPFUN(IppStatus, ippsGFpECPointGetSize,(const IppsGFpECState* pEC, int* pSize))
     78 {
     79    IPP_BAD_PTR2_RET(pEC, pSize);
     80    pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
     81    IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr );
     82 
     83    {
     84       int elemLen = GFP_FELEN(GFP_PMA(ECP_GFP(pEC)));
     85       *pSize = sizeof(IppsGFpECPoint)
     86                      +elemLen*sizeof(BNU_CHUNK_T) /* X */
     87                      +elemLen*sizeof(BNU_CHUNK_T) /* Y */
     88                      +elemLen*sizeof(BNU_CHUNK_T);/* Z */
     89       return ippStsNoErr;
     90    }
     91 }
     92 
     93 /*F*
     94 // Name: ippsGFpECPointInit
     95 //
     96 // Purpose: Initializes the context of a point on an elliptic curve
     97 //
     98 // Returns:                   Reason:
     99 //    ippStsNullPtrErr          pPoint == NULL
    100 //                              pEC == NULL
    101 //
    102 //    ippStsContextMatchErr     invalid pEC->idCtx
    103 //
    104 //    ippStsNoErr               no error
    105 //
    106 // Parameters:
    107 //    pX, pY    Pointers to the X and Y coordinates of a point on the elliptic curve
    108 //    pPoint    Pointer to the IppsGFpECPoint context being initialized
    109 //    pEC       Pointer to the context of the elliptic curve
    110 //
    111 *F*/
    112 
    113 IPPFUN(IppStatus, ippsGFpECPointInit,(const IppsGFpElement* pX, const IppsGFpElement* pY,
    114                                       IppsGFpECPoint* pPoint, IppsGFpECState* pEC))
    115 {
    116    IPP_BAD_PTR2_RET(pPoint, pEC);
    117    pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
    118    IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr );
    119 
    120    {
    121       Ipp8u* ptr = (Ipp8u*)pPoint;
    122       int elemLen = GFP_FELEN(GFP_PMA(ECP_GFP(pEC)));
    123 
    124       ECP_POINT_ID(pPoint) = idCtxGFPPoint;
    125       ECP_POINT_FLAGS(pPoint) = 0;
    126       ECP_POINT_FELEN(pPoint) = elemLen;
    127       ptr += sizeof(IppsGFpECPoint);
    128       ECP_POINT_DATA(pPoint) = (BNU_CHUNK_T*)(ptr);
    129 
    130       if(pX && pY)
    131          return ippsGFpECSetPoint(pX, pY, pPoint, pEC);
    132       else {
    133          gfec_SetPointAtInfinity(pPoint);
    134          return ippStsNoErr;
    135       }
    136    }
    137 }
    138