AES_GCMGetTag¶
Generates the authentication tag in the GCM mode.
Syntax¶
IppStatus ippsAES_GCMGetTag (Ipp8u* pTag, int tagLen, const IppsAES_GCMState* pState);
Include Files¶
ippcp.h
Parameters¶
pTag |
Pointer to the authentication tag. |
tagLen |
Length of the authentication tag *pTag (in bytes). |
pState |
Pointer to the IppsAES_GCMState context. |
Description¶
The function generates and computes the authentication tag of length tagLen according to GCM as specified in [NIST SP 800-38D]. A call to ippsAES_GCMGetTag does not stop the process of authenticated encryption/decryption.
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 context parameter does not match the operation. |
ippStsLengthErr |
Indicates an error condition if tagLen <1 or taglen >16. |