tari-project / tari-crypto / 5922868370

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feat: simplify zeroizing and add test to DHKE (#197)

Simplifies the implementation of zeroizing support for Diffie-Hellman
key exchanges and improves test coverage.

Currently, the `DiffieHellmanSharedSecret` struct has manual
implementations of `zeroize` and `drop` to handle zeroizing. Now that we
have a more modern version of `zeroize` as a dependency, we can do
better. This PR uses that crate's `Zeroize` and `ZeroizeOnDrop` derived
traits to handle this more cleanly. It also adds a sanity check that the
byte representations of both sides of a key exchange match, which
improves test coverage.

Partially addresses #196.

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