Cryptography for Intel(R) Integrated Performance Primitives Developer Reference

ID 768738
Date 12/16/2022
Public
Document Table of Contents

GFpECESGetSize_SM2

Gets the size of the SM2 elliptic curve encryption context.

Syntax

IppStatus ippsGFpECESGetSize_SM2(const IppsGFpECState* pEC, int* pSize);

Include Files

ippcp.h

Parameters

pEC

Pointer to the elliptic curve context.

pSize

Pointer to the size, in bytes, of the ECES context.
Description

The function computes the size of the buffer in bytes for the IppsECES_StateSM2 context to be used later. The pEC parameter represents a properly initialized elliptic curve using the encryption scheme.

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.

ippStsNotSupportedModeErr

Indicates an error condition if the IppsGFpECState context parameter defines an elliptic curve over an extension of the prime finite field.

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