reuse the hasher after finalized?

[ibigbug]

it seems the finalize() will consume the hasher:

Retrieve result and consume hasher instance.

https://docs.rs/md-5/latest/md5/trait.Digest.html#tymethod.finalize

how ever it doesn't reset the state.

how to reuse and write more data into the hasher after finalized()?

[tarcieri]

Use finalize_reset

[ibigbug]

i think i didn't make it clear - it's not about resetting the state. i.e. continue to write more data after finalize() and finalize() again with more data.

[tarcieri]

Then you want to Clone prior to finalization

[burdges]

Also, merlin was more designed for this sort of thing.

As an aside, rust maybe needs some replace_with method that makes reset methods unnecessary by ensuring zero copies: rust-lang/rfcs#2884 (comment)

[burdges]

It appears https://docs.rs/replace_with/ provides equivalent functionality to the *reset methods.