Generate SHA-1 input block B2 of 512 bits(total input = 128-bit authentication key KD + 160-bit hash HMAC1 +1 +159 0s + 100100000).
what's "+1 +159 0s + 100100000" mean? I can't understand the above formula how to get a 512-bit message.
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Hi,
There is an app note that might be helpful for the BQ26100 - the information also applies to the BQ40Z50: https://www.ti.com/lit/an/slua389a/slua389a.pdf
It describes the 128 key and the 160 bit hash.
Best regards,
Matt