My observations when HMAC(SHA1) is selected for multiple files:
Only the HMAC(SHA1) Message Digest of the FIRST file is correct!
Subsequent files show an incorrect Message Digest when compared to a known Message Digest source (e.g. HashCalc).
See the following test results for 3 identical files:
Test 1 no HMAC
Test 2 HMAC
C:\rng1.bin - 90d4bd1410916bf857b977f3a6449dc558263294
C:\rng6.bin - 90d4bd1410916bf857b977f3a6449dc558263294
C:\rng7.bin - 90d4bd1410916bf857b977f3a6449dc558263294
Also: HMAC seed is a Text String (not Hex.)
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