block-buffer: release 0.10 ?

[mat-gas]

Hi,
I was just wondering, block-buffer has been in pre (0.10.0-preX) state for almost a year now

In 0.10, this commit (#113) is of particular interest because of the "make it almost panic-free" part :
This PR modifies block-buffer and block-padding APIs to reduce their surface and to make them mostly panic-free

As quite some algorithms depends on it, releasing the version here and bumping dependencies should also make those panic-free too

For instance, with this mini-reproducer for the Shabal algorithm, still using block-buffer 0.9:

    let mut a = Shabal256::new();
    a.update(b"\x01");
    a.finalize();

When looking at the assembly:

  if ( (unsigned __int8)sub_9050(a1 + 8, 64LL, *(_QWORD *)a1) )
    sub_6E20(
      "called `Result::unwrap()` on an `Err` value  /home/test/.cargo/registry/src/gh.neting.cc-1ecc6299db9ec823/shabal-0.3.0/src/shabal.rs",
      43LL,
      v20,
      &off_407B8,
      &off_407D8);

The related unwrap seems to be this one (https://github.com/RustCrypto/hashes/blob/master/shabal/src/shabal.rs#L248)

AFAIK, it should be panic-free in 0.10 and the compiler should optimize away this error handling

Again, sorry for the inconvenience and thanks for all the hard work on those different crates

[newpavlov]

There is a bunch of unmerged changes in #566. I think the block-buffer part is mostly complete, but I ponder about some potential changes to block-padding in respect of exposing amount of space needed for padding at the type system level. But I probably will release those later in a backwards compatible manner.

Also I probably will release block-buffer v0.10 synchronously with digest v0.10 (see RustCrypto/traits#727) and updated hashes (RustCrypto/hashes#217) and MAC (RustCrypto/MACs#95) crates.

So to summarize: hopefully the updates will be released relatively soon. At the very least it probably will be done before the end of this year.