ippsAES_CMACSetupNoise¶
Turns on the mitigation for AES-CMAC mode - the ippsAES_CMACUpdate processing function.
Syntax¶
IppStatus ippsAES_CMACSetupNoise,(Ipp32u noiseLevel, IppsAES_CMACState* pState)
Include Files¶
ippcp.h
Parameters¶
noiseLevel |
The value of this parameter is directly proportional to the amount of noise to be injected. Increasing the noiseLevel by 1 means the delay (performance impact) is doubled. |
pState |
Pointer to the |
Description¶
This function saves noise parameters in the pState context structure. A user-adjustable parameter is noiseLevel, it can be varied from 0 to 4. When processing function is called with this context it checks the context for the noiseLevel value and if it is non-zero, the function enables mitigation mechanism: the data passed to the processing function is divided into chunks, and each chunk is followed by probabilistic noise injection.
Return Values¶
ippStsNullPtrErr |
Indicates an error condition if pState pointer is NULL. |
ippStsContextMatchErr |
Indicates an error condition if the pState parameter does not match the operation. |
ippStsLengthErr |
Indicates an error if noiseLevel > 4. |
ippStsNotSupportedModeErr |
Indicates an error condition if the AES-NI and VAES-NI instructions are not available on the target processor. |
ippStsNoErr |
Indicates no error. |
Any other value indicates an error or a warning.