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.