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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 //        ippsGFpECSetPointAtInfinity()
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: ippsGFpECSetPointAtInfinity
60 //
61 // Purpose: Sets a point on an elliptic curve as a point at infinity
62 //
63 // Returns:                   Reason:
64 //    ippStsNullPtrErr          pPoint == NULL
65 //                              pEC == NULL
66 //
67 //    ippStsContextMatchErr     invalid pEC->idCtx
68 //                              invalid pPoint->idCtx
69 //
70 //    ippStsOutOfRangeErr       ECP_POINT_FELEN()!=GFP_FELEN()
71 //
72 //    ippStsNoErr               no error
73 //
74 // Parameters:
75 //    pPoint    Pointer to the IppsGFpECPoint context
76 //    pEC       Pointer to the context of the elliptic curve
77 //
78 *F*/
79 
80 IPPFUN(IppStatus, ippsGFpECSetPointAtInfinity,(IppsGFpECPoint* pPoint, IppsGFpECState* pEC))
81 {
82    IPP_BAD_PTR2_RET(pPoint, pEC);
83    pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
84    IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr );
85    IPP_BADARG_RET( !ECP_POINT_TEST_ID(pPoint), ippStsContextMatchErr );
86 
87    IPP_BADARG_RET( ECP_POINT_FELEN(pPoint)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr);
88 
89    gfec_SetPointAtInfinity(pPoint);
90    return ippStsNoErr;
91 }
92