Maybe a bit daft of me to ask this, but is it possible to calculate a hash on a stream of bytes where the resulting hash is considered to be part of that stream?

In other words, lets assume that I have a stream which is, say, 64 bytes long in total, consisting of 48 bytes of "payload", plus 16-byte for the hash and that hash has been calculated based on the *entire* stream (payload+hash) of 64 bytes. Would that be possible to produce with openssl or is this a bit of a chicken-and-egg scenario? Thanks!
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