diff --git a/.github/dependabot.yml b/.github/dependabot.yml new file mode 100644 index 0000000..7827bb5 --- /dev/null +++ b/.github/dependabot.yml @@ -0,0 +1,12 @@ +version: 2 +updates: + - package-ecosystem: cargo + directory: "/" + schedule: + interval: weekly + open-pull-requests-limit: 10 + - package-ecosystem: github-actions + directory: "/" + schedule: + interval: "weekly" + open-pull-requests-limit: 10 \ No newline at end of file diff --git a/.github/workflows/belt-hmac-rng.yml b/.github/workflows/belt-hmac-rng.yml new file mode 100644 index 0000000..b16dd34 --- /dev/null +++ b/.github/workflows/belt-hmac-rng.yml @@ -0,0 +1,58 @@ +name: belt-hmac-rng + +on: + pull_request: + paths: + - ".github/workflows/belt-hmac-rng.yml" + - "belt-hmac-rng/**" + - "Cargo.*" + push: + branches: master + +defaults: + run: + working-directory: belt-hmac-rng + +env: + CARGO_INCREMENTAL: 0 + RUSTFLAGS: "-Dwarnings" + +jobs: + build: + runs-on: ubuntu-latest + strategy: + matrix: + rust: + - 1.65.0 # MSRV + - stable + target: + - thumbv7em-none-eabi + - wasm32-unknown-unknown + steps: + - uses: actions/checkout@v4 + - uses: dtolnay/rust-toolchain@master + with: + toolchain: ${{ matrix.rust }} + targets: ${{ matrix.target }} + - uses: RustCrypto/actions/cargo-hack-install@master + - run: cargo hack build --target ${{ matrix.target }} --feature-powerset --exclude-features std + + minimal-versions: + uses: RustCrypto/actions/.github/workflows/minimal-versions.yml@master + with: + working-directory: ${{ github.workflow }} + + test: + runs-on: ubuntu-latest + strategy: + matrix: + rust: + - 1.65.0 # MSRV + - stable + steps: + - uses: actions/checkout@v4 + - uses: dtolnay/rust-toolchain@master + with: + toolchain: ${{ matrix.rust }} + - uses: RustCrypto/actions/cargo-hack-install@master + - run: cargo hack test --feature-powerset \ No newline at end of file diff --git a/.github/workflows/workspace.yml b/.github/workflows/workspace.yml new file mode 100644 index 0000000..11dec8c --- /dev/null +++ b/.github/workflows/workspace.yml @@ -0,0 +1,46 @@ +name: Workspace + +on: + pull_request: + paths-ignore: + - README.md + push: + branches: master + paths-ignore: + - README.md + +env: + CARGO_INCREMENTAL: 0 + RUSTFLAGS: "-Dwarnings" + RUSTDOCFLAGS: "-Dwarnings" + +jobs: + clippy: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: dtolnay/rust-toolchain@master + with: + toolchain: 1.73.0 + components: clippy + - run: cargo clippy --all --all-features --tests + + doc: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + + - uses: dtolnay/rust-toolchain@master + with: + toolchain: stable + - run: cargo doc --workspace --all-features + + rustfmt: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: dtolnay/rust-toolchain@master + with: + toolchain: stable + components: rustfmt + - run: cargo fmt --all -- --check \ No newline at end of file diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..29f5722 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,8 @@ +[workspace] +resolver = "2" +members = [ + "belt-hmac-rng" +] + +[profile.dev] +opt-level = 2 \ No newline at end of file diff --git a/README.md b/README.md index abf2f14..9a52f69 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,5 @@ -# RustCrypto: CSRNGs [![Build Status](https://travis-ci.org/RustCrypto/CSRNGs.svg?branch=master)](https://travis-ci.org/RustCrypto/CSRNGs) +# RustCrypto: CSRNGs + Collection of Cryptographically Secure Random Number Generators (CSRNG) written in pure Rust. @@ -7,12 +8,18 @@ All algorithms are split into separate crates and implemented using do not require the standard library (i.e. `no_std` capable) and can be easily used for bare-metal programming. +## Crates + +| Name | Crate name | crates.io | Docs | MSRV | +|-----------------|-------------------|-----------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------|-------------------------| +| [belt-hmac-rng] | [`belt-hmac-rng`] | [![crates.io](https://img.shields.io/crates/v/belt-hmac-rng.svg)](https://crates.io/crates/belt-hmac-rng) | [![Documentation](https://docs.rs/belt-hmac-rng/badge.svg)](https://docs.rs/aes) | ![MSRV 1.65][msrv-1.65] | + ## License All crates licensed under either of - * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0) - * [MIT license](http://opensource.org/licenses/MIT) +* [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0) +* [MIT license](http://opensource.org/licenses/MIT) at your option. @@ -21,3 +28,13 @@ at your option. 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) +[msrv-1.65]: https://img.shields.io/badge/rustc-1.65.0+-blue.svg + +[//]: # (crates) +[`belt-hmac-rng`]: ./belt-hmac-rng + +[//]: # (links) +[belt-hmac-rng]: https://apmi.bsu.by/assets/files/std/brng-spec25.pdf \ No newline at end of file diff --git a/belt-hmac-rng/CHANGELOG.md b/belt-hmac-rng/CHANGELOG.md new file mode 100644 index 0000000..5813f9c --- /dev/null +++ b/belt-hmac-rng/CHANGELOG.md @@ -0,0 +1,9 @@ +# 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 (0000-00-00) +- Initial release diff --git a/belt-hmac-rng/Cargo.toml b/belt-hmac-rng/Cargo.toml new file mode 100644 index 0000000..c61bd7d --- /dev/null +++ b/belt-hmac-rng/Cargo.toml @@ -0,0 +1,29 @@ +[package] +name = "belt-hmac-rng" +version = "0.1.0" +description = "Pure Rust implementation of cryptographically secure random number generator based on the Belt-HMAC PRNG." +authors = ["RustCrypto Developers"] +license = "MIT OR Apache-2.0" +edition = "2021" +readme = "README.md" +documentation = "https://docs.rs/belt-hmac-rng" +repository = "https://github.com/RustCrypto/CSRNGs" +keywords = ["crypto", "rng", "belt-hmac", "hmac", "stb"] +categories = ["cryptography", "no-std"] + + +[dependencies] +rand_core = { version = "0.6.4", default-features = false } +belt-hash = { version = "0.1.1", default-features = false } +hmac = { version = "0.12.1", features = ["reset"] } + +#optional dependencies +zeroize = { version = "1.3.0", optional = true } + +[dev-dependencies] +rand_core = { version = "0.6.4", default-features = false, features = ["getrandom"] } +hex-literal = "0.4.1" + +[features] +std = ["rand_core/std"] +zeroize = ["dep:zeroize"] \ No newline at end of file diff --git a/belt-hmac-rng/LICENSE-APACHE b/belt-hmac-rng/LICENSE-APACHE new file mode 100644 index 0000000..53b7ccd --- /dev/null +++ b/belt-hmac-rng/LICENSE-APACHE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. 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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. \ No newline at end of file diff --git a/belt-hmac-rng/README.md b/belt-hmac-rng/README.md new file mode 100644 index 0000000..268b105 --- /dev/null +++ b/belt-hmac-rng/README.md @@ -0,0 +1,71 @@ +# RustCrypto: Belt-HMAC-RNG + +[![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] +[![HAZMAT][hazmat-image]][hazmat-link] + +Pure Rust implementation of the Belt-HMAC RNG specified in [STB 34.101.47-2017]. + +[Documentation][docs-link] + +## ⚠️ Security Warning: [Hazmat!][hazmat-link] + +This crate does not ensure ciphertexts are authentic (i.e. by using a MAC to +verify ciphertext integrity), which can lead to serious vulnerabilities +if used incorrectly! + +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! + +## Minimum Supported Rust Version + +Rust **1.56** or higher. + +Minimum supported Rust version can be changed in the future, but it will be +done with a minor version bump. + +## SemVer Policy + +- All on-by-default features of this library are covered by SemVer +- MSRV is considered exempt from SemVer as noted above + +## License + +Licensed under either of: + +* [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0) +* [MIT license](http://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://img.shields.io/crates/v/belt-hmac-rng.svg +[crate-link]: https://crates.io/crates/belt-hmac-rng +[docs-image]: https://docs.rs/belt-hmac-rng/badge.svg +[docs-link]: https://docs.rs/belt-hmac-rng/ +[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg +[rustc-image]: https://img.shields.io/badge/rustc-1.56+-blue.svg +[hazmat-image]: https://img.shields.io/badge/crypto-hazmat%E2%9A%A0-red.svg +[hazmat-link]: https://github.com/RustCrypto/meta/blob/master/HAZMAT.md +[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg +[chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260039-block-ciphers +[build-image]: https://github.com/RustCrypto/block-ciphers/workflows/belt-hmac-rng/badge.svg?branch=master&event=push +[build-link]: https://github.com/RustCrypto/block-ciphers/actions?query=workflow%3Abelt-hmac-rng + +[//]: # (general links) + +[STB 34.101.47-2017]: http://apmi.bsu.by/assets/files/std/brng-spec25.pdf \ No newline at end of file diff --git a/belt-hmac-rng/benches/gen.rs b/belt-hmac-rng/benches/gen.rs new file mode 100644 index 0000000..5bf3c3e --- /dev/null +++ b/belt-hmac-rng/benches/gen.rs @@ -0,0 +1,48 @@ +#![feature(test)] +#![allow(non_snake_case)] + +extern crate test; + +use test::{black_box, Bencher}; + +use rand_core::{RngCore, SeedableRng}; + +use belt_hmac_rng::BrngHmacHbelt; + +const RAND_BENCH_N: u64 = 1000; +const BYTES_LEN: usize = 1024; + +#[bench] +fn gen_bytes_belt(b: &mut Bencher) { + let mut rng = BrngHmacHbelt::from_entropy(); + let mut buf = [0u8; BYTES_LEN]; + b.iter(|| { + for _ in 0..RAND_BENCH_N { + rng.fill_bytes(&mut buf); + black_box(buf); + } + }); + b.bytes = BYTES_LEN as u64 * RAND_BENCH_N; +} + +#[bench] +fn belt_uint32(b: &mut Bencher) { + let mut rng = BrngHmacHbelt::from_entropy(); + b.iter(|| { + for _ in 0..RAND_BENCH_N { + black_box(rng.next_u32()); + } + }); + b.bytes = 4 * RAND_BENCH_N; +} + +#[bench] +fn belt_uint64(b: &mut Bencher) { + let mut rng = BrngHmacHbelt::from_entropy(); + b.iter(|| { + for _ in 0..RAND_BENCH_N { + black_box(rng.next_u64()); + } + }); + b.bytes = 8 * RAND_BENCH_N; +} diff --git a/belt-hmac-rng/src/lib.rs b/belt-hmac-rng/src/lib.rs new file mode 100644 index 0000000..b260d41 --- /dev/null +++ b/belt-hmac-rng/src/lib.rs @@ -0,0 +1,144 @@ +//! Pure Rust implementation of the Belt-HMAC-HBELT random number generator. +//! [STB 34.101.47-2017]. +//! +//! # ⚠️ Security Warning: Hazmat! +//! +//! This crate implements only the low-level block cipher function, and is intended +//! for use for implementing higher-level constructions *only*. It is NOT +//! intended for direct use in applications. +//! +//! USE AT YOUR OWN RISK! +//! +//! [STB 34.101.47-2017]: https://apmi.bsu.by/assets/files/std/brng-spec25.pdf +#![no_std] +#![doc( + html_logo_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg", + html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg" +)] +#![cfg_attr(docsrs, feature(doc_cfg))] +#![warn(missing_docs, rust_2018_idioms)] +#![forbid(unsafe_code)] + +use belt_hash::BeltHash; +use hmac::{ + digest::{ + generic_array::GenericArray, + typenum::{U32, U64}, + FixedOutputReset, + }, + Hmac, Mac, +}; +use rand_core::{ + block::{BlockRng, BlockRngCore}, + CryptoRng, Error, RngCore, SeedableRng, +}; +#[cfg(feature = "zeroize")] +use zeroize::{Zeroize, ZeroizeOnDrop}; + +/// Belt-HMAC-HBELT random number generator. +pub struct BrngHmacHbelt(BlockRng); + +type HmacHbelt = Hmac; + +const BUFSIZE: usize = 32; + +/// Belt-HMAC-HBELT random number generator core. +pub struct BeltHmacRngCore { + r: GenericArray, + s: GenericArray, + hmac: HmacHbelt, +} + +impl BeltHmacRngCore { + /// Fill the buffer with random data. + pub fn fill(&mut self, dest: &mut [u8]) { + // 𝑌𝑖 ← hmac[ℎ](𝐾, 𝑟 ‖ 𝑆); + self.hmac.update(&self.r); + self.hmac.update(&self.s); + let y = self.hmac.finalize_fixed_reset(); + dest[..BUFSIZE].copy_from_slice(&y); + + // 𝑟 ← hmac[ℎ](𝐾, 𝑟). + self.hmac.update(&self.r); + self.hmac.finalize_into_reset(&mut self.r); + } +} + +impl BlockRngCore for BeltHmacRngCore { + type Item = u32; + type Results = [u32; 8]; + + fn generate(&mut self, results: &mut Self::Results) { + let mut buf = [0u8; BUFSIZE]; + self.fill(&mut buf); + + for i in 0..BUFSIZE / 4 { + results[i] = + u32::from_le_bytes([buf[i * 4], buf[i * 4 + 1], buf[i * 4 + 2], buf[i * 4 + 3]]); + } + } +} + +#[cfg(feature = "zeroize")] +impl ZeroizeOnDrop for BeltHmacRngCore {} + +impl SeedableRng for BeltHmacRngCore { + type Seed = GenericArray; + + #[allow(unused_mut)] + #[allow(clippy::let_and_return)] + fn from_seed(mut seed: Self::Seed) -> Self { + let rng_core = { + let key = &seed[..BUFSIZE]; + let iv = &seed[BUFSIZE..BUFSIZE + BUFSIZE]; + let mut hmac = HmacHbelt::new_from_slice(key).unwrap(); + + // 𝑟 ← hmac[ℎ](𝐾, 𝑆). + hmac.update(iv); + let r = hmac.finalize_fixed_reset(); + + BeltHmacRngCore { + r, + hmac, + s: GenericArray::::clone_from_slice(iv), + } + }; + + #[cfg(feature = "zeroize")] + seed.zeroize(); + + rng_core + } +} + +impl SeedableRng for BrngHmacHbelt { + type Seed = ::Seed; + + fn from_seed(seed: Self::Seed) -> Self { + BrngHmacHbelt(BlockRng::::from_seed(seed)) + } + + fn from_rng(rng: R) -> Result { + BlockRng::::from_rng(rng).map(BrngHmacHbelt) + } +} + +impl RngCore for BrngHmacHbelt { + fn next_u32(&mut self) -> u32 { + self.0.next_u32() + } + + fn next_u64(&mut self) -> u64 { + self.0.next_u64() + } + + fn fill_bytes(&mut self, dest: &mut [u8]) { + self.0.fill_bytes(dest) + } + + fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> { + self.0.try_fill_bytes(dest) + } +} + +impl CryptoRng for BrngHmacHbelt {} diff --git a/belt-hmac-rng/tests/mod.rs b/belt-hmac-rng/tests/mod.rs new file mode 100644 index 0000000..02308d8 --- /dev/null +++ b/belt-hmac-rng/tests/mod.rs @@ -0,0 +1,26 @@ +use hex_literal::hex; +use hmac::digest::generic_array::GenericArray; +use rand_core::{RngCore, SeedableRng}; + +use belt_hmac_rng::BrngHmacHbelt; + +#[test] +fn test_rng() { + let k = hex!("E9DEE72C 8F0C0FA6 2DDB49F4 6F739647 06075316 ED247A37 39CBA383 03A98BF6"); + let s = hex!("BE329713 43FC9A48 A02A885F 194B09A1 7ECDA4D0 1544AF8C A58450BF 66D2E88A"); + let y = hex!( + " + AF907A0E 470A3A1B 268ECCCC C0B90F23 9FE94A2D C6E01417 9FC789CB 3C3887E4 + 695C6B96 B84948F8 D76924E2 2260859D B9B5FE75 7BEDA2E1 7103EE44 655A9FEF + 648077CC C5002E05 61C6EF51 2C513B8C 24B4F3A1 57221CFB C1597E96 9778C1E4 + " + ); + + let seed = [k, s].concat(); + let seed = GenericArray::from_slice(&seed); + + let mut rng = BrngHmacHbelt::from_seed(*seed); + let mut out = [0u8; 32 * 3]; + rng.fill_bytes(&mut out); + assert_eq!(out, y); +}