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HMAC operation

Question asked by Rohini Narasipur on Feb 16, 2016
Latest reply on Feb 17, 2016 by bpe

Hello, ALGORITHM OPERATION command has 2 types of HMAC: normal HMAC and HMAC with precomputed IPAD and OPAD. Does this mean that for the first option we don't have to give key? And for the second option, security manual says if we first issue KEY command for IPAD and OPAD followed by FIFO STORE, then key will be encrypted and stored. So while verifying we can specify encrypted key by calling KEY command or we have to again call KEY command for IPAD and OPAD?