Developer Reference

Contents

GFpECMakePoint

Constructs the coordinates of a point on an elliptic curve based on the X-coordinate.

Syntax

IppStatus ippsGFpECMakePoint(const IppsGFpElement*
pX
, IppsGFpECPoint*
pPoint
, IppsGFpECState*
pEC
);
Include Files
ippcp.h
Parameters
pX
Pointer to the
X
-coordinate of the point on the elliptic curve.
pPoint
Pointer to the
IppsGFpECPoint
context.
pEC
Pointer to the context of the elliptic curve.
Description
This function computes the coordinates of a point on an elliptic curve based on the
X
-coordinate.
Return Values
ippStsNoErr
Indicates no error. Any other value indicates an error or warning.
ippStsNullPtrErr
Indicates an error condition if any of the specified pointers is
NULL
.
ippStsContextMatchErr
Indicates an error condition if any of the specified contexts does not match the operation.
ippStsOutOfRangeErr
Indicates an error condition in the following cases:
  • The coordinates of the point
    pPoint
    do not belong to the finite field over which the elliptic curve is initialized.
  • The point coordinate
    pX
    does not belong to the finite field over which the elliptic curve is initialized.
ippStsBadArgErr
Indicates an error condition if the finite field over which the elliptic curve is initialized is not prime.
ippStsQuadraticNonResidueErr
Indicates an error condition if the square of the
Y
-coordinate of the point is a quadratic non-residue modulo
p
.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.