Cryptography for Intel(R) Integrated Performance Primitives Developer Reference

ID 768738
Date 12/16/2022
Public
Document Table of Contents

ECCPNegativePoint

Finds an elliptic curve point which is an additive inverse for the given point over GF(p).

Syntax

IppStatus ippsECCPNegativePoint(const IppsECCPPointState* pP, IppsECCPPointState* pR, IppsECCPState* pECC);

Include Files

ippcp.h

Parameters

pP

Pointer to the elliptic curve point P.

pR

Pointer to the elliptic curve point R.

pECC

Pointer to the context of the elliptic cryptosystem.
Description

The function finds an elliptic curve point R over a prime finite field GF(p), which is an additive inverse of the given point P, that is, R = - P .

The elliptic curve domain parameters must be hitherto defined by one of the functions: ECCPSet or ECCPSetStd.

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 one of the contexts pointed by pP, pR, or pECC is not valid.

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