GFpECESGetSize_SM2
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 isNULL.
- ippStsContextMatchErr
- Indicates an error condition if theIppsGFpECStatecontext parameter does not match the operation.
- ippStsNotSupportedModeErr
- Indicates an error condition if theIppsGFpECStatecontext parameter defines an elliptic curve over an extension of the prime finite field.