If folk really want to index into a hash they can us `as_byte_array`
then index that.
Includes a bump to the version number of `hashes` to `v0.15.0` - this
is because otherwise `secp` won't build since we are breaking an API
that is used in the current release of secp.
Fix: #3115
Currently we have a trait `Hash` that is required for `Hmac`, `Hkdf`,
and other use cases. However, it is unegonomic for users who just want
to do a simple hash to have to import the trait.
Add inherent functions to all hash types including those created with
the new wrapper type macros.
This patch introduces some duplicate code but we are trying to make
progress in the hashes API re-write. We can come back and de-dublicate
later.
Includes making `to_byte_array`,`from_byte_array`, `as_byte_array`, and
`all_zeros` const where easily possible.
We were using an outdated CBOR crate for MSRV reasons. But this old
crate is causing suprious test failures. So delete it. (Sadly, updating
the crate doesn't fix the issue, replacing it with ciborium breaks our
MSRV tests because it needs a more recent `half` dependency, and
replacing it with `minicbor` doesn't work because minicbor is not based
on serde. So we don't really have any options.)
In general, I am suspicious of this decode-then-reencode test. CBOR has
some ambiguity in integer encoding. Empirically it has seemed to
work for a long time, but this seems more like an indictment of our test
than a positive result.
Also, round-trip testing serde encoding of a byte vector is probably not
a great use of our fuzz resources. I don't believe we have ever had a
problem with this.
Fixes#2801
We should probably restore this in the future, but we need to rethink
how we fuzz hashes -- right now when cfg(fuzzing) is set, we break all
the hash functions in a way that won't match any other library.
We should probably make this breakage opt-in but this will require
buy-in from rust-lightning and maybe others.
AFAICT we literally never used this; it was available only on the
bitcoin targets and not the honggfuzz ones; AFL has a broken dep
tree (or at least, requires some more MSRV pins that I did not care
to investigate).
Just remove it entirely.
Tobin C. Harding
Andrew Poelstra