ctutils v0.4.0 (#1410)

## Added
- `core::num::NonZero<T>` support (#1368)
- Pluggable trait impls for `[T]` and `[T; N]` with 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)

Author: tarcieri

Cargo.lock

@@ -4,6 +4,33 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 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])
+
+[#1363]: https://github.com/RustCrypto/utils/pull/1363
+[#1368]: https://github.com/RustCrypto/utils/pull/1368
+[#1376]: https://github.com/RustCrypto/utils/pull/1376
+[#1386]: https://github.com/RustCrypto/utils/pull/1386
+[#1388]: https://github.com/RustCrypto/utils/pull/1388
+[#1389]: https://github.com/RustCrypto/utils/pull/1389
+[#1391]: https://github.com/RustCrypto/utils/pull/1391
+[#1405]: https://github.com/RustCrypto/utils/pull/1405
+
 ## 0.3.2 (2026-01-16)
 ### Added
 - `BytesCtEq` and `BytesCtSelect` traits ([#1359])

ctutils/CHANGELOG.md

@@ -5,7 +5,7 @@ Constant-time utility library with selection and equality testing support target
 applications. Supports `const fn` where appropriate. Built on the `cmov` crate which provides
 architecture-specific predication intrinsics. Heavily inspired by the `subtle` crate.
 """
-version = "0.4.0-pre.5"
+version = "0.4.0"
 authors = ["RustCrypto Developers"]
 license = "Apache-2.0 OR MIT"
 homepage = "https://github.com/RustCrypto/utils/tree/master/ctselect"