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Description of Figure The Mac Class

Link to figure The Mac Class

This figure consists of boxes labeled as follows:

Data: Two boxes are labeled this
MAC (HmacSHA256): Two boxes are labeled this
Shared Secret Key
Signal Digest Hash: Two boxes are labeled this
If data was the same, the hash is the same

Labeled arrows connect these boxes:

update(): From Data #1 to MAC (HmacSHA256) #1
doFinal(): From Data #1 to MAC (HmacSHA256) #1
update(): From Data #2 to MAC (HmacSHA256) #2
doFinal(): From Data #2 to MAC (HmacSHA256) #2

Unlabeled arrows connect these boxes:

From Shared Secret Key to MAC (HmacSHA256) (two separate arrows)
From MAC (HmacSHA256) #1 to Signed Digest Hash #1
From MAC (HmacSHA256) #2 to Signed Digest Hash #2
From Signed Digest Hash #1 to If data was the same, the hash is the same
From Signed Digest Hash #2 to If data was the same, the hash is the same

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