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. |