Not rejecting your idea outright, just curious how it would work with
e.g. instant messengers where there is streaming of irregularly-sized
packets coming at irregular intervals (and the users would expect that
Things Just Work(tm) for both two-character messages and five-megabyte
files sent over the wire).
I would expect the interface to use non-chunked mode for a simple "buffer in,
buffer out" interface ("secret box"), and chunked mode ("secret stream") for
streamed data. In your example, a messenger would probably encrypt text
messages by passing an entire buffer, while images or larger data could be
streamed.
This is a useful distinction to have in general, streaming APIs are much harder
to use correctly than simple buffered ones. See also libsodium.
- V
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