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| |
| /* |
| // |
| // Purpose: |
| // Intel(R) Integrated Performance Primitives. Cryptography Primitives. |
| // EC over GF(p) Operations |
| // |
| // Context: |
| // ippsGFpECSetPointRegular() |
| // |
| */ |
| |
| #include "owndefs.h" |
| #include "owncp.h" |
| #include "pcpgfpecstuff.h" |
| #include "pcphash.h" |
| #include "pcphash_rmf.h" |
| |
| /*F* |
| // Name: ippsGFpECSetPointRegular |
| // |
| // Purpose: Sets a point with Big Number coordinates |
| // |
| // Returns: Reason: |
| // ippStsNullPtrErr pPoint == NULL |
| // pEC == NULL |
| // pX == NULL |
| // pY == NULL |
| // |
| // ippStsContextMatchErr invalid pEC->idCtx |
| // invalid pPoint->idCtx |
| // invalid pX->idCtx |
| // invalid pY->idCtx |
| // |
| // ippStsOutOfRangeErr GFP_FELEN() < pX <= 0 |
| // GFP_FELEN() < pY <= 0 |
| // ECP_POINT_FELEN(pPoint)!=GFP_FELEN() |
| // |
| // ippStsNoErr no error |
| // |
| // Parameters: |
| // pX, pY Pointers to the X and Y coordinates of a point on the elliptic curve |
| // pPoint Pointer to the IppsGFpECPoint context |
| // pEC Pointer to the context of the elliptic curve |
| // |
| *F*/ |
| |
| IPPFUN(IppStatus, ippsGFpECSetPointRegular,(const IppsBigNumState* pX, const IppsBigNumState* pY, |
| IppsGFpECPoint* pPoint, |
| IppsGFpECState* pEC)) |
| { |
| IPP_BAD_PTR2_RET(pPoint, pEC); |
| pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); |
| IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr ); |
| IPP_BADARG_RET( !ECP_POINT_TEST_ID(pPoint), ippStsContextMatchErr ); |
| |
| IPP_BAD_PTR2_RET(pX, pY); |
| pX = (IppsBigNumState*)( IPP_ALIGNED_PTR(pX, BN_ALIGNMENT) ); |
| pY = (IppsBigNumState*)( IPP_ALIGNED_PTR(pY, BN_ALIGNMENT) ); |
| IPP_BADARG_RET( !BN_VALID_ID(pX), ippStsContextMatchErr ); |
| IPP_BADARG_RET( !BN_VALID_ID(pY), ippStsContextMatchErr ); |
| IPP_BADARG_RET( !BN_POSITIVE(pX), ippStsOutOfRangeErr); |
| IPP_BADARG_RET( !BN_POSITIVE(pY), ippStsOutOfRangeErr); |
| |
| { |
| IppsGFpState* pGF = ECP_GFP(pEC); |
| gsModEngine* pGFE = GFP_PMA(pGF); |
| int elemLen = GFP_FELEN(pGFE); |
| |
| IPP_BADARG_RET( !GFP_IS_BASIC(pGFE), ippStsBadArgErr ) |
| |
| IPP_BADARG_RET( BN_SIZE(pX) > elemLen, ippStsOutOfRangeErr); |
| IPP_BADARG_RET( BN_SIZE(pY) > elemLen, ippStsOutOfRangeErr); |
| IPP_BADARG_RET( ECP_POINT_FELEN(pPoint)!=elemLen, ippStsOutOfRangeErr); |
| |
| { |
| BNU_CHUNK_T* pointX = ECP_POINT_X(pPoint); |
| BNU_CHUNK_T* pointY = ECP_POINT_Y(pPoint); |
| BNU_CHUNK_T* pointZ = ECP_POINT_Z(pPoint); |
| |
| cpGFpElementCopyPadd(pointX, elemLen, BN_NUMBER(pX), BN_SIZE(pX)); |
| cpGFpElementCopyPadd(pointY, elemLen, BN_NUMBER(pY), BN_SIZE(pY)); |
| cpGFpElementCopy(pointZ, MOD_MNT_R(pGFE), elemLen); |
| |
| if( cpGFpSet(pointX, pointX, elemLen, pGFE) && cpGFpSet(pointY, pointY, elemLen, pGFE) ) |
| ECP_POINT_FLAGS(pPoint) = ECP_AFFINE_POINT | ECP_FINITE_POINT; |
| else |
| gfec_SetPointAtInfinity(pPoint); |
| |
| return ippStsNoErr; |
| } |
| } |
| } |