Changelog

Entries are listed in reverse chronological order.

2.5.0

  • Add constant-timedness note to the documentation for CtOption::unwrap_or_else.
  • Add CtOption::expect.
  • Add ConstantTimeEq::ct_ne with default implementation.
  • Add new core_hint_black_box feature from Diane Hosfelt and Amber Sprenkels which utilises the original black_box functionality from when subtle was first written, which has now found it's way into the Rust standard library.
  • Add new const-generics feature from @survived which adds support for subtle traits for generic arrays [T; N].
  • Add new feature for supporting core::cmp::Ordering for types which implement subtle traits, patch from @tarcieri.
  • Update rand dependency to 0.8.

2.4.1

  • Fix a bug in how the README was included in the documentation builds which caused nightly builds to break.

2.4.0

  • Add new ConstantTimeGreater and ConstantTimeLess traits, as well as implementations for unsigned integers, by @isislovecruft.

2.3.0

  • Add impl ConstantTimeEq for Choice by @tarcieri.
  • Add impl From<CtOption<T>> for Option<T> by @CPerezz. This is useful for handling library code that produces CtOptions in contexts where timing doesn't matter.
  • Introduce an MSRV policy.

2.2.3

  • Remove the nightly-only asm-based black_box barrier in favor of the volatile-based one, fixing compilation on current nightlies.

2.2.2

  • Update README.md to clarify that 2.2 and above do not require the nightly feature.

2.2.1

  • Adds an or_else combinator for CtOption, by @ebfull.
  • Optimized black_box for nightly, by @jethrogb.
  • Optimized black_box for stable, by @dsprenkels.
  • Fixed CI for no_std, by @dsprenkels.
  • Fixed fuzz target compilation, by @3for.

2.2.0

  • Error during cargo publish, yanked.

2.1.1

  • Adds the “crypto” tag to crate metadata.
  • New shorter, more efficient ct_eq() for integers, contributed by Thomas Pornin.

2.1.0

  • Adds a new CtOption<T> which acts as a constant-time Option<T> (thanks to @ebfull for the implementation).
  • Choice now itself implements ConditionallySelectable.

2.0.0

  • Stable version with traits reworked from 1.0.0 to interact better with the orphan rules.