ECCPNegativePoint
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 pointP.
- pR
- Pointer to the elliptic curve pointR.
- 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 isNULL.
- ippStsContextMatchErr
- Indicates an error condition if one of the contexts pointed bypP,pR, orpECCis not valid.