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Add bash-f (STB 34.101.77-2020) (#92)

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Alexandr Kitaev 2025-10-24 00:49:57 +03:00 committed by GitHub
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name: bash-f
on:
pull_request:
paths:
- "bash-f.yml"
- "bash-f/**"
- "Cargo.*"
push:
branches: master
defaults:
run:
working-directory: bash-f
env:
RUSTFLAGS: "-Dwarnings"
CARGO_INCREMENTAL: 0
jobs:
set-msrv:
uses: RustCrypto/actions/.github/workflows/set-msrv.yml@master
with:
msrv: 1.85.0
build:
needs: set-msrv
runs-on: ubuntu-latest
strategy:
matrix:
rust:
- ${{needs.set-msrv.outputs.msrv}}
- stable
target:
- thumbv7em-none-eabi
- wasm32-unknown-unknown
steps:
- uses: actions/checkout@v4
- uses: RustCrypto/actions/cargo-cache@master
- uses: dtolnay/rust-toolchain@master
with:
toolchain: ${{ matrix.rust }}
targets: ${{ matrix.target }}
- run: cargo build --no-default-features --target ${{ matrix.target }}
minimal-versions:
uses: RustCrypto/actions/.github/workflows/minimal-versions.yml@master
with:
working-directory: ${{ github.workflow }}
test:
needs: set-msrv
runs-on: ubuntu-latest
strategy:
matrix:
rust:
- ${{needs.set-msrv.outputs.msrv}}
- stable
steps:
- uses: actions/checkout@v4
- uses: RustCrypto/actions/cargo-cache@master
- uses: dtolnay/rust-toolchain@master
with:
toolchain: ${{ matrix.rust }}
- run: cargo test --no-default-features
- run: cargo test
- run: cargo test --all-features
miri:
runs-on: ubuntu-latest
env:
MIRIFLAGS: "-Zmiri-symbolic-alignment-check -Zmiri-strict-provenance"
strategy:
matrix:
target:
- x86_64-unknown-linux-gnu
- s390x-unknown-linux-gnu
steps:
- uses: actions/checkout@v4
- uses: RustCrypto/actions/cargo-cache@master
- uses: dtolnay/rust-toolchain@master
with:
toolchain: nightly
- name: Install Miri
run: |
rustup component add miri
cargo miri setup
- name: Test with Miri
run: |
cargo miri test --target ${{ matrix.target }} --no-default-features
cargo miri test --target ${{ matrix.target }}
cargo miri test --target ${{ matrix.target }} --all-features

4
Cargo.lock generated
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@ -9,6 +9,10 @@ dependencies = [
"zeroize",
]
[[package]]
name = "bash-f"
version = "0.1.0-rc.0"
[[package]]
name = "cpufeatures"
version = "0.2.17"

1
Cargo.toml
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@ -2,5 +2,6 @@
resolver = "2"
members = [
"ascon",
"bash-f",
"keccak",
]

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# Changelog
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).
## 0.1.0 (UNRELEASED)
- Initial release ([#92])
[#92]: (https://github.com/RustCrypto/sponges/pull/92)

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[package]
name = "bash-f"
version = "0.1.0-rc.0"
description = "Pure Rust implementation of the bash-f sponge function defined in STB 34.101.77-2020"
license = "Apache-2.0 OR MIT"
authors = ["RustCrypto Developers"]
documentation = "https://docs.rs/bash"
homepage = "https://github.com/RustCrypto/sponges/tree/master/bash"
repository = "https://github.com/RustCrypto/sponges"
keywords = ["bash", "belt", "permutation"]
categories = ["cryptography", "no-std"]
readme = "README.md"
edition = "2024"
rust-version = "1.85"

201
bash-f/LICENSE-APACHE Normal file
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25
bash-f/LICENSE-MIT Normal file
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@ -0,0 +1,25 @@
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# RustCrypto: bash-f
[![crate][crate-image]][crate-link]
[![Docs][docs-image]][docs-link]
![Apache2/MIT licensed][license-image]
![Rust Version][rustc-image]
[![Project Chat][chat-image]][chat-link]
[![Build Status][build-image]][build-link]
# BelHash - [STB 34.101.77-2020] Sponge-Based Cryptographic Algorithms
This module implements the cryptographic algorithms defined in the Belarusian
state standard STB 34.101.77-2020 "Sponge-based cryptographic algorithms".
## Overview
The standard defines a family of cryptographic algorithms built on a sponge
construction with the `bash-f` sponge function at its core. The sponge function
operates on 1536-bit (192-byte) states.
## Security Notes
No security audits of this crate have ever been performed, and it has not been thoroughly assessed to ensure its operation is constant-time on common CPU architectures.
USE AT YOUR OWN RISK!
## License
Licensed under either of:
* [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0)
* [MIT license](https://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.
[//]: # (badges)
[crate-image]: https://buildstats.info/crate/bash-f
[crate-link]: https://crates.io/crates/bash-f
[docs-image]: https://docs.rs/bash-f/badge.svg
[docs-link]: https://docs.rs/bash-f/
[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
[rustc-image]: https://img.shields.io/badge/rustc-1.85+-blue.svg
[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
[chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260038-AEADs
[downloads-image]: https://img.shields.io/crates/d/chacha20poly1305.svg
[build-image]: https://github.com/RustCrypto/AEADs/workflows/bash-f/badge.svg?branch=master&event=push
[build-link]: https://github.com/RustCrypto/AEADs/actions
[//]: # (general links)
[STB 34.101.77-2020]: https://apmi.bsu.by/assets/files/std/bash-spec241.pdf

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#![feature(test)]
extern crate test;
use bash_f::{STATE_WORDS, bash_f};
use test::Bencher;
#[bench]
fn bench_bash_f(b: &mut Bencher) {
let mut state = [0u64; STATE_WORDS];
b.iter(|| {
bash_f(test::black_box(&mut state));
test::black_box(&state);
});
}
#[bench]
fn bench_bash_f_10_rounds(b: &mut Bencher) {
let mut state = [0u64; STATE_WORDS];
b.iter(|| {
for _ in 0..10 {
bash_f(test::black_box(&mut state));
}
test::black_box(&state);
});
}
#[bench]
fn bench_bash_f_100_rounds(b: &mut Bencher) {
let mut state = [0u64; STATE_WORDS];
b.iter(|| {
for _ in 0..100 {
bash_f(test::black_box(&mut state));
}
test::black_box(&state);
});
}

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bash-f/src/lib.rs Normal file
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#![no_std]
#![doc = include_str!("../README.md")]
#![doc(
html_logo_url = "https://raw.githubusercontent.com/RustCrypto/meta/master/logo.svg",
html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/meta/master/logo.svg"
)]
#![cfg_attr(docsrs, feature(doc_cfg))]
#![warn(missing_docs)]
/// Number of 64-bit words in the state
pub const STATE_WORDS: usize = 24;
/// `bash-s` transformation.
///
/// Implements the S-box transformation defined in Section 6.1 of STB 34.101.77-2020.
/// This is the core non-linear transformation used in the `bash-f` sponge function.
fn bash_s(
mut w0: u64,
mut w1: u64,
mut w2: u64,
m1: u32,
n1: u32,
m2: u32,
n2: u32,
) -> (u64, u64, u64) {
// 1. T0 ← RotHi^m1(W0)
let t0 = w0.rotate_left(m1);
// 2. W0 ← W0 ⊕ W1 ⊕ W2
w0 ^= w1 ^ w2;
// 3. T1 ← W1 ⊕ RotHi^n1(W0)
let t1 = w1 ^ w0.rotate_left(n1);
// 4. W1 ← T0 ⊕ T1
w1 = t0 ^ t1;
// 5. W2 ← W2 ⊕ RotHi^m2(W2) ⊕ RotHi^n2(T1)
w2 ^= w2.rotate_left(m2) ^ t1.rotate_left(n2);
// 6. T0 ← ¬W2
let t0 = !w2;
// 7. T1 ← W0 ∨ W2
let t1 = w0 | w2;
// 8. T2 ← W0 ∧ W1
let t2 = w0 & w1;
// 9. T0 ← T0 ∨ W1
let t0 = t0 | w1;
// 10. W1 ← W1 ⊕ T1
w1 ^= t1;
// 11. W2 ← W2 ⊕ T2
w2 ^= t2;
// 12. W0 ← W0 ⊕ T0
w0 ^= t0;
// 13. Return (W0, W1, W2)
(w0, w1, w2)
}
/// `bash-f` sponge permutation.
///
/// Implements the core sponge function defined in Section 6.2 of STB 34.101.77-2020.
/// This is a cryptographic permutation that operates on 1536-bit states.
///
/// # Parameters
///
/// - `state`: Mutable reference to 24 × 64-bit words (1536 bits total)
pub fn bash_f(state: &mut [u64; STATE_WORDS]) {
// 1. Split S into words (S0, S1, ..., S23)
// 2. C ← B194BAC80A08F53B (initialize round constant, swapped to little-endian)
let mut c: u64 = 0x3BF5080AC8BA94B1;
// 3. For i = 1, 2, ..., 24 perform 24 rounds
for _ in 0..STATE_WORDS {
// 3.1. Apply S-box layer with varying rotation parameters
// (m1, n1, m2, n2) ← (8, 53, 14, 1)
let (mut m1, mut n1, mut m2, mut n2) = (8, 53, 14, 1);
// 3.2. For j = 0, 1, ..., 7 apply bash-s to each of 8 columns
for j in 0..8 {
// 3.2.a. (Sj, S8+j, S16+j) ← bash-s(Sj, S8+j, S16+j, m1, n1, m2, n2)
let (s0, s1, s2) = bash_s(state[j], state[8 + j], state[16 + j], m1, n1, m2, n2);
state[j] = s0;
state[8 + j] = s1;
state[16 + j] = s2;
// 3.2.b. (m1, n1, m2, n2) ← (7·m1 mod 64, 7·n1 mod 64, 7·m2 mod 64, 7·n2 mod 64)
(m1, n1, m2, n2) = ((7 * m1) % 64, (7 * n1) % 64, (7 * m2) % 64, (7 * n2) % 64);
}
// 3.3. Apply word permutation
// S ← S15 ‖ S10 ‖ S9 ‖ S12 ‖ S11 ‖ S14 ‖ S13 ‖ S8 ‖
// S17 ‖ S16 ‖ S19 ‖ S18 ‖ S21 ‖ S20 ‖ S23 ‖ S22 ‖
// S6 ‖ S3 ‖ S0 ‖ S5 ‖ S2 ‖ S7 ‖ S4 ‖ S1
const INDEXES: [usize; STATE_WORDS] = [
15, 10, 9, 12, 11, 14, 13, 8, 17, 16, 19, 18, 21, 20, 23, 22, 6, 3, 0, 5, 2, 7, 4, 1,
];
*state = INDEXES.map(|i| state[i]);
// 3.4. S23 ← S23 ⊕ C (add round constant)
state[23] ^= c;
// 3.5. Update LFSR (Galois configuration)
// if ⌊C⌉ is even, then C ← ShLo(C)
// else C ← ShLo(C) ⊕ AED8E07F99E12BDC
if c & 1 == 0 {
c >>= 1;
} else {
c = (c >> 1) ^ 0xDC2BE1997FE0D8AE;
}
}
// 4. Return S - state is modified in place
}
#[cfg(test)]
mod tests {
use super::*;
/// Test vector from Table A.1 of STB 34.101.77-2020.
#[test]
fn test_bash_s_table_a1() {
// Constants in the spec are given using LE order
// For example, in spec when they write B194BAC80A08F53B, they do not mean 0xB194BAC80A08F53B, but 0x3BF5080AC8BA94B1.
// https://github.com/RustCrypto/sponges/pull/92#issuecomment-3433315011
let w0 = 0xB194BAC80A08F53Bu64.swap_bytes();
let w1 = 0xE12BDC1AE28257ECu64.swap_bytes();
let w2 = 0xE9DEE72C8F0C0FA6u64.swap_bytes();
let (w0_out, w1_out, w2_out) = bash_s(w0, w1, w2, 8, 53, 14, 1);
assert_eq!(w0_out, 0x479E76129979DC5Fu64.swap_bytes());
assert_eq!(w1_out, 0x0F2B2C93ED128EDDu64.swap_bytes());
assert_eq!(w2_out, 0x41009B1B112DFEF3u64.swap_bytes());
}
}

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use bash_f::bash_f;
/// Test vector from Table A.2 of STB 34.101.77-2020.
#[test]
fn test_bash_f_table_a2() {
let input: [u64; 24] = [
0xB194BAC80A08F53B,
0x366D008E584A5DE4,
0x8504FA9D1BB6C7AC,
0x252E72C202FDCE0D,
0x5BE3D61217B96181,
0xFE6786AD716B890B,
0x5CB0C0FF33C356B8,
0x35C405AED8E07F99,
0xE12BDC1AE28257EC,
0x703FCCF095EE8DF1,
0xC1AB76389FE678CA,
0xF7C6F860D5BB9C4F,
0xF33C657B637C306A,
0xDD4EA7799EB23D31,
0x3E98B56E27D3BCCF,
0x591E181F4C5AB793,
0xE9DEE72C8F0C0FA6,
0x2DDB49F46F739647,
0x06075316ED247A37,
0x39CBA38303A98BF6,
0x92BD9B1CE5D14101,
0x5445FBC95E4D0EF2,
0x682080AA227D642F,
0x2687F93490405511,
];
let expected: [u64; 24] = [
0x8FE727775EA7F140,
0xB95BB6A200CBB28C,
0x7F0809C0C0BC68B7,
0xDC5AEDC841BD94E4,
0x03630C301FC255DF,
0x5B67DB53EF65E376,
0xE8A4D797A6172F22,
0x71BA48093173D329,
0xC3502AC946767326,
0xA2891971392D3F70,
0x89959F5D61621238,
0x655975E00E2132A0,
0xD5018CEEDB17731C,
0xCD88FC50151D37C0,
0xD4A3359506AEDC2E,
0x6109511E7703AFBB,
0x014642348D8568AA,
0x1A5D9868C4C7E6DF,
0xA756B1690C7C2608,
0xA2DC136F5997AB8F,
0xBB3F4D9F033C87CA,
0x6070E117F099C409,
0x4972ACD9D976214B,
0x7CED8E3F8B6E058E,
];
// Constants in the spec are given using LE order
// For example, in spec when they write B194BAC80A08F53B, they do not mean 0xB194BAC80A08F53B, but 0x3BF5080AC8BA94B1.
// https://github.com/RustCrypto/sponges/pull/92#issuecomment-3433315011
let mut state = input.map(|x| x.swap_bytes());
bash_f(&mut state);
let output = state.map(|x| x.swap_bytes());
assert_eq!(output, expected);
}