[Cryptography-dev] Create Fernet API allowing streaming encryption and decryption from file-like objects.

[Michael Iverson]

>
>
> To handle missing or out of order chunks, you could maintain an hmac
> digest of all blocks processed prior to the current block, in addition to
> the added block. A missing block would cause the HMAC to fail. There would
> also need to be a method to ensure that we only a certain number of chunks.
>
>
Sorry, the last sentence was incoherent. I meant to say you'd need to be
able to identify a truncated stream of chunks.
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