GFpECVerify

Verifies the parameters of an elliptic curve.

Syntax

IppStatus ippsGFpECVerify(IppECResult* pResult, IppsGFpECState* pEC, Ipp8u* pScratchBuffer);

Include Files

ippcp.h

Parameters

pResult	Pointer to the verification result.
pEC	Pointer to the context of the elliptic curve.
pScratchBuffer	Pointer to the scratch buffer of size produced by ippsGFpECScratchBufferSize.

Description

This function verifies the parameters of the elliptic curve from the input IppsGFpECState context and returns the result in pResult. The result of the verification may have the following values:

The ippsGFpECScratchBufferSize function should be called with nScalars equal to at least 2 to get the valid pScratchBuffer.

ippECValid	Parameters are valid.
ippECIsZeroDiscriminant	`4 ⋅ A`³`+ 3 ⋅ B`²`= 0`.
ippECPointIsAtInfinity	Base point `G = (x, y)` is a point at infinity.
ippECPointIsNotValid	Base point `G = (x, y)` does not belong to the curve.
ippECInvalidOrder	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 the IppsGFpECState context parameter does not match the operation.