GFPXECVerify

Verifies parameters of the elliptic curve over the GF(p^d) field.

Syntax

IppStatus ippsGFPXECVerify(IppsGFPXECState *pEC, IppsECResult *result);

Parameters

pEC	Pointer to the context of the elliptic curve.
result	The result of the parameter verification.

Description

This function is declared in the ippcp.h file. The function verifies parameters of the elliptic curve from the input IppsGFPXECState context and returns the result in *result. The result of the verification may have the following values:

ippECValid	Parameters are valid.
ippECIsZeroDiscriminant	4`A`³+3`B`²=0 `mod g(t)`.
ippECPointIsAtInfinity	Base point `G=(x,y)` is the point at infinity.
ippECPointIsNotValid	Base point `G=(x,y)` is not on the curve.
ippECInvalidOrder	The order of the base point `G=(x,y)` is invalid.

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 any of the context parameters does not match the operation.