Developer Reference

Contents

GFpECESFinal_SM2

Completes the ECES SM2 encryption or decryption chain.

Syntax

IppStatus ippsGFpECESFinal_SM2(Ipp8u*
pTag
, int
tagLen
, ippsECES_StateSM2*
pState
);
Include Files
ippcp.h
Parameters
pTag
Pointer to the tag buffer.
tagLen
Requested length of the authentication tag.
pState
Pointer to the buffer being initialized as the ECES context.
Description
The function completes the Elliptic Curve Encryption Scheme (ECES) SM2 algorithm and returns the computed authentication tag.
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
IppsECES_StateSM2
context parameter does not match the operation.
ippStsSizeErr
Indicates an error condition if
tagLen
<0 or
tagLen
>32.
ippStsShareKeyErr
Indicates an error condition if all generated key gammas were zeros in the encryption or decryption steps.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.