CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

0.4.2 (2026-04-02)

Fixed

• cmov v0.5.3 version requirement (#1467)

0.4.1 (2026-04-02)

Added

• isize/usize and NonZero* trait impls (#1416)
• subtle migration guide (#1465)

0.4.0 (2026-01-19)

Added

• core::num::NonZero<T> support (#1368)
• Pluggable trait impls for [T] and [T; N] using helper traits: (#1388)
  • CtAssign: CtAssignSlice
  • CtEq: CtEqSlice
  • CtSelect: CtSelectArray
• CtSelectUsingCtAssign marker trait (#1391)

Changed

• Split CtAssign out of CtSelect (#1363)
• Bump cmov to v0.5 (#1386)

Removed

• BytesCtEq/BytesCtSelect no longer needed because default [u8] impls are fast (#1376)
• target_pointer_width gating (#1389)
• unsafe code (#1405)

0.3.2 (2026-01-16)

Added

• BytesCtEq and BytesCtSelect traits (#1359)
• CtFind trait (#1361)
• CtLookup trait (#1362)

Changed

• Bump cmov crate dependency to v0.5.0-pre.0 (#1357)

0.3.1 (2026-01-03)

Added

• Choice::to_u8_mask/to_u16_mask (#1322)
• Choice::select_u8/select_u16 (#1324)

0.3.0 (2025-12-29)

Removed

• Choice::new (#1314)
• (Partial)Eq impls for Choice (#1315)

0.2.3 (2025-12-29)

Added

• Impl From<u8> for Choice (#1309)
• Choice::from_u8* and from_u16* (#1311)

Changed

• Deprecate Choice::new (#1312)

0.2.2 (2025-12-28)

Added

• Unsigned CtNeg impls (#1306)

0.2.1 (2025-12-27)

Added

• Enhanced subtle interop (#1289)

Security

• Pin to cmov v0.4.3+ - includes important security fixes (#1304)

0.2.0 (2025-12-27)

Added

• Additional Choice::from_u128* constructors (#1285)
• CtNeg trait (#1286)

Changed

• Renamed Choice::from_*_nonzero => from_*_nz (#1287)

0.1.4 (2025-12-26)

Added

• Impl CtEq/CtSelect for isize (#1283)

0.1.3 (2025-12-26)

Fixed

• Rustdoc syntax for variable-time-related warning text (#1278)

0.1.2 (2025-12-26)

Added

• Additional methods for CtOption (#1274):
  • some
  • none
  • into_option_copied
  • filter_by
  • as_inner_unchecked
  • to_inner_unchecked
• Default impl for CtOption (#1274)
• map! and unwrap_or! macros (#1274)
• u128 methods for Choice (#1277):
  • from_u128_le
  • from_u128_lsb
  • select_u128

0.1.1 (2025-12-26)

Added

• Additional const fn constructor and predication methods for Choice (#1266, #1272)

0.1.0 (2025-12-19)

• Initial release