Developer Reference

Contents

AES_CMACUpdate

Updates the MAC value depending on the current input message stream of the specified length.

Syntax

IppStatus ippsAES_CMACUpdate(const Ipp8u *
pSrc
, int
len
, IppsAES_CMACState*
pState
);
Include Files
ippcp.h
Parameters
pSrc
Pointer to the buffer containing a part or the entire message.
len
Length of the actual part of the message in bytes.
pState
Pointer to the
IppsAES_CMACState
context.
Description
The function updates the MAC value depending on the current input message stream of the specified length. The function first integrates the previous partial message block with the input message stream and then partitions the obtained message into multiple message blocks with a possible additional partial block. For each message block, the function uses the AES cipher to transform the input block into a new chaining MAC value.
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
.
ippStsLengthErr
Indicates an error condition if the input data stream length is less than zero.
ippStsContextMatchErr
Indicates an error condition if the context parameter does not match the operation.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.