GFpECInit

Developer Reference for Intel® Integrated Performance Primitives Cryptography

Initializes the context of an elliptic curve over a finite field.

Syntax

IppStatus ippsGFpECInit(const IppsGFpState* pGF, const IppsGFpElement* pA, const IppsGFpElement* pB, IppsGFpECState* pEC);

Include Files

ippcp.h

Parameters

pGF	Pointer to the IppsGFpState context of the underlying finite field.
pA	Pointer to the coefficient `A` of the equation defining the elliptic curve.
pB	Pointer to the coefficient `B` of the equation defining the elliptic curve.
pEC	Pointer to the context of the elliptic curve being initialized.

Description

This function initializes the memory buffer pEC associated with the IppsGFpECState context and sets up the parameters of the elliptic curve if they are supplied. The initialized context is used in functions that create contexts of points on the curve (elements of the group of points) and perform operations with the points.

Note

Only the pEC and pGF parameters are required. You can omit the other parameters by setting their values to NULL or zero and set them up later on by calling GFpECSet or GFpECSetSubGroup.

Note

When calling arithmetic functions for the elliptic curve defined by pEC, a properly initialized pGF context of the underlying field is required.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or warning.
ippStsNullPtrErr	Indicates an error condition if either pEC or pGF is NULL.
ippStsContextMatchErr	Indicates an error condition in the following cases: IppsGFpState context parameter does not match the operation. pA or pB is not zero and the corresponding context parameter does not match the operation.