ECCPComparePoint¶
Compares two points on the elliptic curve defined over GF(p).
Syntax¶
IppStatus ippsECCPComparePoint(const IppsECCPPointState* pP, const IppsECCPPointState* pQ, IppECResult* pResult, IppsECCPState* pECC);
Include Files¶
ippcp.h
Parameters¶
pP |
Pointer to the elliptic curve point P. |
pQ |
Pointer to the elliptic curve point Q. |
pResult |
Pointer to the comparison result of two points: P and Q. |
pECC |
Pointer to the context of the elliptic cryptosystem. |
Description¶
The function compares two points P and Q on the elliptic curve defined over a prime finite field GF(p) and allocates the comparison result in accordance with the pointer pResult.
The elliptic curve domain parameters must be hitherto defined by one of the functions: ECCPSet or ECCPSetStd.
The comparison result of two points P and Q can take one of the following values:
ippECPointIsEqual |
Points P and Q are equal. |
ippECPointIsNotEqual |
Points P and Q are different. |
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 or pECC is not valid. |