AES_CCMGetTag¶
Generates the message authentication tag in the CCM mode.
Syntax¶
IppStatus ippsAES_CCMGetTag (Ipp8u* pTag, int tagLen, const IppsAES_CCMState* 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_CCMState context. |
Description¶
The function generates and computes the authentication tag of length tagLen bytes in the CCM mode as specified in [NIST SP 800-38C]. The ippsRijndael128GCMGetTag function does not stop the encryption/decryption and authentication process.
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 is less than one or tagLen exceeds the tag length specified in the previous call to AES_CCMTagLen. |