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digest: add dev::initialized_mac_test function #2367

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Merged
newpavlov merged 3 commits into from
Apr 7, 2026
Merged

digest: add dev::initialized_mac_test function #2367

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fe073ab
Add raw_mac_test to allow testing Macs that don't support KeyInit
SalusaSecondus Apr 5, 2026
9cea1c1
Rename raw_mac_test to initialized_mac_test
SalusaSecondus Apr 6, 2026
25b1b01
Update changelog
newpavlov Apr 7, 2026
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6 changes: 6 additions & 0 deletions digest/CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,12 @@ 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).

## 0.11.3 (UNRELEASED)
### Added
- `dev::initialized_mac_test` function ([#2367])

[#2367]: https://github.com/RustCrypto/traits/pull/2367

## 0.11.2 (2026-03-13)
### Changed
- Do not implement `Clone` as part of `(Reset)MacTraits` in the `buffer_fixed!` macro ([#2341])
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11 changes: 11 additions & 0 deletions digest/src/dev/mac.rs
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Expand Up @@ -31,6 +31,17 @@ pub fn mac_test<M: Mac + KeyInit + Clone>(
return Err("Failed to initialize MAC instance");
};

initialized_mac_test(mac0, input, tag, trunc_side)
}

/// Run the MAC test directly on an initialized MAC.
/// This is useful for when custom initialization is needed
pub fn initialized_mac_test<M: Mac + Clone>(
mac0: M,
input: &[u8],
tag: &[u8],
trunc_side: MacTruncSide,
) -> Result<(), &'static str> {
let mut mac = mac0.clone();
mac.update(input);
let result = mac.finalize().into_bytes();
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