AES_CCMGetTag
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 theIppsAES_CCMStatecontext.
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 isNULL.
- ippStsContextMatchErr
- Indicates an error condition if the context parameter does not match the operation.
- ippStsLengthErr
- Indicates an error condition iftagLenis less than one ortagLenexceeds the tag length specified in the previous call to AES_CCMTagLen.