SHA is waaaaay too easy to misuse #2041
Description
- Creating multiple peripheral drivers is trivial and at each time it resets the peripheral (https://github.com/esp-rs/esp-hal/blob/v0.20.0/esp-hal/src/sha.rs#L427-L444). This makes the driver a gigantic footgun when used in multiple contexts
- We're accessing the peripheral in
process_bufferin a racy way
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