version 1.3.3

Changes since 1.3.2:
- Fix incorrect output from AVX-512 intrinsics under GCC 5.4 and 6.1 in
  debug mode. This bug was found in unit tests and probably doesn't
  affect the public API in practice. See
  BLAKE3-team#271.

version 1.3.2:

Changes since 1.3.1:
- Dependency updates only. This includes updating Clap to v4, which
  changes the format of the `b3sum --help` output. The new MSRV is
  1.59.0 for `blake3` and 1.60.0 for `b3sum`. Note that this project
  doesn't have any particular MSRV policy, and we don't consider MSRV
  bumps to be breaking changes.

version 1.3.1

Changes since 1.3.0:
- The unstable `traits-preview` feature now includes an implementation
  of `crypto_common::BlockSizeUser`, AKA
  `digest::core_api::BlockSizeUser`. This allows `blake3::Hasher` to be
  used with `hmac::SimpleHmac`.

version 1.3.0

Changes since 1.2.0:
- Added blake3_hasher_reset to the C API, for parity with the Rust API.
- Updated digest to v0.10. This version merged the crypto-mac crate with
  digest, so the dependency on crypto-mac has been removed. These trait
  implementations are still gated behind the "traits-preview" feature.
- Updated clap to v3.

version 1.2.0

Changes since 1.1.0:
- SECURITY FIX: Fixed an instance of undefined behavior in the Windows
  SSE2 assembly implementations, which affected both the Rust and C
  libraries in their default build configurations. See
  BLAKE3-team#206. The cause was a
  vector register that wasn't properly saved and restored. This bug has
  been present since SSE2 support was initially added in v0.3.7. The
  effects of this bug depend on surrounding code and compiler
  optimizations; see test_issue_206_windows_sse2 for an example of this
  bug causing incorrect hash output. Note that even when surrounding
  code is arranged to trigger this bug, the SSE2 implementation is
  normally only invoked on CPUs where SSE4.1 (introduced in 2007) isn't
  supported. One notable exception, however, is if the Rust library is
  built in `no_std` mode, with `default_features = false` or similar. In
  that case, runtime CPU feature detection is disabled, and since LLVM
  assumes that all x86-64 targets support SSE2, the SSE2 implementation
  will be invoked. For that reason, Rust callers who build `blake3` in
  `no_std` mode for x86-64 Windows targets are the most likely to
  trigger this bug. We found this bug in internal testing, and we aren't
  aware of any callers encountering it in practice.
- Added the Hasher::count() method.

version 1.1.0

Changes since 1.0.0:
- The NEON implementation is now enabled by default on AArch64 targets.
  Previously it was disabled without the "neon" Cargo feature in Rust or
  the "BLAKE3_USE_NEON=1" preprocessor flag in C. This is still the case
  on ARM targets other than AArch64, because of the lack of dynamic CPU
  feature detection on ARM. Contributed by @rsdy.
- The previous change leads to some build incompatibilities,
  particularly in C. If you build the C implementation for AArch64
  targets, you now need to include blake3_neon.c, or else you'll get a
  linker error like "undefined reference to `blake3_hash_many_neon'". If
  you don't want the NEON implementation, you need to explicitly set
  "BLAKE3_USE_NEON=0". On the Rust side, AArch64 targets now require the
  C toolchain by default. build.rs includes workarounds for missing or
  very old C compilers for x86, but it doesn't currently include such
  workarounds for AArch64. If we hear about build breaks related to
  this, we can add more workarounds as appropriate.
- C-specific Git tags ("c-0.3.7" etc.) have been removed, and all the
  projects in this repo (Rust "blake3", Rust "b3sum", and the C
  implementation) will continue to be versioned in lockstep for the
  foreseeable future.

version 1.0.0

Changes since 0.3.8:
- Add Hash::from_hex() and implement FromStr for Hash.
- Implement Display for Hash, equivalent to Hash::to_hex().
- Implement PartialEq<[u8]> for Hash, using constant_time_eq.
- Change derive_key() to return a 32-byte array. As with hash() and
  keyed_hash(), callers who want a non-default output length can use
  Hasher::finalize_xof().
- Replace Hasher::update_with_join() with Hasher::update_rayon(). The
  former was excessively generic, and the Join trait leaked
  implementation details. As part of this change, the Join trait is no
  longer public.
- Upgraded arrayvec to 0.7.0, which uses const generics. This bumps the
  minimum supported Rust compiler version to 1.51.
- Gate the digest and crypto-mac trait implementations behind an
  unstable feature, "traits-preview". As part of this change upgrade
  crypto-mac to 0.11.0.

version 0.3.8

Changes since 0.3.7:
- This is a backport release of bugfixes from master. The next release
  of master will be version 1.0.
- Fix a build break under Visual Studio 2015:
  BLAKE3-team#142

version 0.3.7

Changes since 0.3.6:
- BUGFIX: The C implementation was incorrect on big endian systems for
  inputs longer than 1024 bytes. This bug affected all previous versions
  of the C implementation. Little endian platforms like x86 were
  unaffected. The Rust implementation was also unaffected.
  @jakub-zwolakowski and @pascal-cuoq from TrustInSoft reported this
  bug: BLAKE3-team#118
- BUGFIX: The C build on x86-64 was producing binaries with an
  executable stack. @tristanheaven reported this bug:
  BLAKE3-team#109
- @mkrupcale added optimized implementations for SSE2. This improves
  performance on older x86 processors that don't support SSE4.1.
- The C implementation now exposes the
  `blake3_hasher_init_derive_key_raw` function, to make it easier to
  implement language bindings. Added by @k0001.

version 0.3.6

Changes since 0.3.5:
- Fix a build break in the assembly files under older versions of GCC.