GFpECEncryptSM2_Ext_EncMsgSize

Gets the buffer size of the SM2 Encrypt Cipher text.

Syntax

IppStatus ippsGFpECEncryptSM2_Ext_EncMsgSize (const IppsGFpECState * pEC, int ctMsgSize, int * pSize)

Include Files

ippcp.h

Parameters

pEC	Pointer to the elliptic curve context.
ctMsgSize	Message size.
pSize	Pointer to the size, in bytes, of the buffer cipher text.

Description

The function computes the size of the buffer in bytes for the ciphertext to be used later. The pEC parameter represents a properly initialized elliptic curve using the SM2 Encrypt.

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 are 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.
ippStsOutOfRangeErr	Indicates an error condition if ctMsgSize < 0.