ECCPNegativePoint

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

Syntax

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

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

This function is declared in the ippcp.h file.

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.