Developer Reference for Intel® Integrated Performance Primitives Cryptography 2018

GFpGetSize

Gets the size of the context of a GF(q) field.

Syntax

IppStatus ippsGFpGetSize(int bitSize, int* pStateSizeInBytes);

Include Files

ippcp.h

Parameters

bitSize

Size, in bytes, of the odd prime number q (modulus of GF(q)).

pStateSizeInBytes

Pointer to the buffer size, in bytes, needed for the IppsGFpState context.

Description

This function returns the size of the buffer associated with the IppsGFpState context, which you can use to store data of the finite field GF(q) determined by the odd prime number q of size not greater than bitSize bit.

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.

ippStsSizeErr

Indicates an error condition if bitSize is less than 2 or greater than 1024.