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Sienna Meridian Satterwhite
2026-03-26 22:33:59 +00:00
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{"files":{".cargo_vcs_info.json":"c58c8b9a5c99d6e720e7882855d6ef25b1da32e3f00282e079dd4597d61ac4c5","CHANGELOG.md":"f98ad35016b033dfc004630f55b60fcaa3ed892adb9574c4e377f07fc4521831","Cargo.toml":"0be50951cbe38cf7669bc8943ab4f11577fe7015f454a17566ddac9df39bcfd5","Cargo.toml.orig":"66a74496f67daf7b57559626906de5f02597faaca8c4d7e1c8f6c92abe2c3192","LICENSE-APACHE":"a9040321c3712d8fd0b09cf52b17445de04a23a10165049ae187cd39e5c86be5","LICENSE-MIT":"c0fabcc308b450cb6fe62c9f56fae6abbeb9768eb80d992484c857d744846c2e","README.md":"8b35b0682506ab6cc75433a47d93240f17f26f8fed49fd0d128ca7b8db57f41a","benches/ghash.rs":"9399734b477c7e4f2f415ef5c06cb68bc6bc54820f2812fce6a4c06172d03c55","src/lib.rs":"df449412b068a1d66fad81b814347980b04ea724e0642fb10a84b53806d6c302","tests/lib.rs":"543f0fc664313b4936cffdb7ed4494686588ba9a25e9544b4fdeba9c72087041"},"package":"f0d8a4362ccb29cb0b265253fb0a2728f592895ee6854fd9bc13f2ffda266ff1"}

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{
"git": {
"sha1": "655c6cbef85b0faa7ff24c0686986cf2c27b2c6d"
},
"path_in_vcs": "ghash"
}

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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).
## 0.5.1 (2024-03-03)
### Added
- add `new_with_init_block` ([#195])
[#195]: https://github.com/RustCrypto/universal-hashes/pull/195
## 0.5.0 (2022-07-31)
### Changed
- Relax `zeroize` constraints ([#147])
- Upgrade to Rust 2021 edition ([#147])
- Bump `polyval` to v0.6.0 ([#164])
[#147]: https://github.com/RustCrypto/universal-hashes/pull/147
[#164]: https://github.com/RustCrypto/universal-hashes/pull/164
## 0.4.4 (2021-08-27)
### Changed
- Relax `zeroize` constraints ([#141])
[#141]: https://github.com/RustCrypto/universal-hashes/pull/141
## 0.4.3 (2021-07-20)
### Changed
- Pin `zeroize` dependency to v1.3 ([#134])
[#134]: https://github.com/RustCrypto/universal-hashes/pull/134
## 0.4.2 (2021-05-31)
### Added
- Nightly-only ARMv8 intrinsics support gated under the `armv8` feature ([#126])
[#126]: https://github.com/RustCrypto/universal-hashes/pull/126
## 0.4.1 (2021-05-05)
### Added
- `force-soft` feature ([#121])
[#121]: https://github.com/RustCrypto/universal-hashes/pull/121
## 0.4.0 (2021-04-29)
### Changed
- Bump `polyval` crate dependency to v0.5; MSRV 1.49+ ([#114], [#119])
[#114]: https://github.com/RustCrypto/universal-hashes/pull/114
[#119]: https://github.com/RustCrypto/universal-hashes/pull/119
## 0.3.1 (2020-12-26)
### Added
- `Debug` impl using `opaque-debug` ([#105])
### Changed
- Use `polyval::mulx` ([#109])
[#105]: https://github.com/RustCrypto/universal-hashes/pull/105
[#109]: https://github.com/RustCrypto/universal-hashes/pull/109
## 0.3.0 (2020-06-06)
### Changed
- Bump `polyval` dependency to v0.4 ([#59])
- Bump `universal-hash` dependency to v0.4; MSRV 1.41 ([#52], [#57])
- Rename `result` methods to to `finalize` ([#56])
[#59]: https://github.com/RustCrypto/universal-hashes/pull/59
[#57]: https://github.com/RustCrypto/universal-hashes/pull/57
[#56]: https://github.com/RustCrypto/universal-hashes/pull/56
[#52]: https://github.com/RustCrypto/universal-hashes/pull/52
## 0.2.3 (2019-11-14)
### Changed
- Upgrade to `zeroize` 1.0 ([#33])
[#33]: https://github.com/RustCrypto/universal-hashes/pull/33
## 0.2.2 (2019-10-06)
### Fixed
- Revert mulX_POLYVAL changes from [#28] ([#31])
[#31]: https://github.com/RustCrypto/universal-hashes/pull/31
## 0.2.1 (2019-10-05)
### Changed
- Upgrade to `polyval` v0.3 ([#28], [#29])
[#29]: https://github.com/RustCrypto/universal-hashes/pull/29
[#28]: https://github.com/RustCrypto/universal-hashes/pull/28
## 0.2.0 (2019-10-04)
### Changed
- Upgrade to `polyval` v0.2 and `universal-hash` crate v0.3 ([#22])
[#22]: https://github.com/RustCrypto/universal-hashes/pull/22
## 0.1.0 (2019-09-19)
- Initial release

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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
edition = "2021"
rust-version = "1.56"
name = "ghash"
version = "0.5.1"
authors = ["RustCrypto Developers"]
description = """
Universal hash over GF(2^128) useful for constructing a Message Authentication Code (MAC),
as in the AES-GCM authenticated encryption cipher.
"""
documentation = "https://docs.rs/ghash"
readme = "README.md"
keywords = [
"aes-gcm",
"crypto",
"universal-hashing",
]
categories = [
"cryptography",
"no-std",
]
license = "Apache-2.0 OR MIT"
repository = "https://github.com/RustCrypto/universal-hashes"
[dependencies.opaque-debug]
version = "0.3"
[dependencies.polyval]
version = "0.6.2"
[dependencies.zeroize]
version = "1"
optional = true
default-features = false
[dev-dependencies.hex-literal]
version = "0.3"
[features]
std = ["polyval/std"]

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Copyright (c) 2019 RustCrypto Developers
Permission is hereby granted, free of charge, to any
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DEALINGS IN THE SOFTWARE.

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# RustCrypto: GHASH
[![crate][crate-image]][crate-link]
[![Docs][docs-image]][docs-link]
![Apache2/MIT licensed][license-image]
![Rust Version][rustc-image]
[![Build Status][build-image]][build-link]
[![HAZMAT][hazmat-image]][hazmat-link]
[GHASH][1] is a [universal hash function][2] which operates over GF(2^128) and
can be used for constructing a [Message Authentication Code (MAC)][3].
Its primary intended use is for implementing [AES-GCM][4].
[Documentation][docs-link]
## Security
### ⚠️ Warning: [Hazmat!][hazmat-link]
Universal hash functions have subtle security properties and using them
correctly is difficult. See the [toplevel README.md](../README.md) for more
information.
USE AT YOUR OWN RISK!
### Notes
This crate has received one [security audit by NCC Group][5], with no significant
findings. We would like to thank [MobileCoin][6] for funding the audit.
All implementations contained in the crate are designed to execute in constant
time, either by relying on hardware intrinsics (i.e. AVX2 on x86/x86_64), or
using a portable implementation which is only constant time on processors which
implement constant-time multiplication.
It is not suitable for use on processors with a variable-time multiplication
operation (e.g. short circuit on multiply-by-zero / multiply-by-one, such as
certain 32-bit PowerPC CPUs and some non-ARM microcontrollers).
## 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/ghash.svg
[crate-link]: https://crates.io/crates/ghash
[docs-image]: https://docs.rs/ghash/badge.svg
[docs-link]: https://docs.rs/ghash/
[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
[build-image]: https://github.com/RustCrypto/universal-hashes/workflows/ghash/badge.svg?branch=master&event=push
[build-link]: https://github.com/RustCrypto/universal-hashes/actions?query=workflow%3Aghash
[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
[//]: # (footnotes)
[1]: https://en.wikipedia.org/wiki/Galois/Counter_Mode#Mathematical_basis
[2]: https://en.wikipedia.org/wiki/Universal_hashing
[3]: https://en.wikipedia.org/wiki/Message_authentication_code
[4]: https://en.wikipedia.org/wiki/Galois/Counter_Mode
[5]: https://research.nccgroup.com/2020/02/26/public-report-rustcrypto-aes-gcm-and-chacha20poly1305-implementation-review/
[6]: https://www.mobilecoin.com/

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#![feature(test)]
extern crate test;
use ghash::{
universal_hash::{KeyInit, UniversalHash},
GHash,
};
use test::Bencher;
// TODO(tarcieri): move this into the `universal-hash` crate
macro_rules! bench {
($name:ident, $bs:expr) => {
#[bench]
fn $name(b: &mut Bencher) {
let key = Default::default();
let mut m = GHash::new(&key);
let data = [0; $bs];
b.iter(|| {
m.update_padded(&data);
});
b.bytes = $bs;
}
};
}
bench!(bench1_10, 10);
bench!(bench2_100, 100);
bench!(bench3_1000, 1000);
bench!(bench3_10000, 10000);

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//! **GHASH**: universal hash over GF(2^128) used by AES-GCM for message
//! authentication (i.e. GMAC).
//!
//! ## Implementation Notes
//!
//! The implementation of GHASH found in this crate internally uses the
//! [`polyval`] crate, which provides a similar universal hash function used by
//! AES-GCM-SIV (RFC 8452).
//!
//! By implementing GHASH in terms of POLYVAL, the two universal hash functions
//! can share a common core, meaning any optimization work (e.g. CPU-specific
//! SIMD implementations) which happens upstream in the `polyval` crate
//! benefits GHASH as well.
//!
//! From RFC 8452 Appendix A:
//! <https://tools.ietf.org/html/rfc8452#appendix-A>
//!
//! > GHASH and POLYVAL both operate in GF(2^128), although with different
//! > irreducible polynomials: POLYVAL works modulo x^128 + x^127 + x^126 +
//! > x^121 + 1 and GHASH works modulo x^128 + x^7 + x^2 + x + 1. Note
//! > that these irreducible polynomials are the "reverse" of each other.
//!
//! [`polyval`]: https://github.com/RustCrypto/universal-hashes/tree/master/polyval
#![no_std]
#![doc(
html_logo_url = "https://raw.githubusercontent.com/RustCrypto/media/8f1a9894/logo.svg",
html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/media/8f1a9894/logo.svg"
)]
#![warn(missing_docs, rust_2018_idioms)]
pub use polyval::universal_hash;
use polyval::Polyval;
use universal_hash::{
consts::U16,
crypto_common::{BlockSizeUser, KeySizeUser, ParBlocksSizeUser},
KeyInit, UhfBackend, UhfClosure, UniversalHash,
};
#[cfg(feature = "zeroize")]
use zeroize::Zeroize;
/// GHASH keys (16-bytes)
pub type Key = universal_hash::Key<GHash>;
/// GHASH blocks (16-bytes)
pub type Block = universal_hash::Block<GHash>;
/// GHASH tags (16-bytes)
pub type Tag = universal_hash::Block<GHash>;
/// **GHASH**: universal hash over GF(2^128) used by AES-GCM.
///
/// GHASH is a universal hash function used for message authentication in
/// the AES-GCM authenticated encryption cipher.
#[derive(Clone)]
pub struct GHash(Polyval);
impl KeySizeUser for GHash {
type KeySize = U16;
}
impl GHash {
/// Initialize GHASH with the given `H` field element and initial block
#[inline]
pub fn new_with_init_block(h: &Key, init_block: u128) -> Self {
let mut h = *h;
h.reverse();
#[allow(unused_mut)]
let mut h_polyval = polyval::mulx(&h);
#[cfg(feature = "zeroize")]
h.zeroize();
#[allow(clippy::let_and_return)]
let result = GHash(Polyval::new_with_init_block(&h_polyval, init_block));
#[cfg(feature = "zeroize")]
h_polyval.zeroize();
result
}
}
impl KeyInit for GHash {
/// Initialize GHASH with the given `H` field element
#[inline]
fn new(h: &Key) -> Self {
Self::new_with_init_block(h, 0)
}
}
struct GHashBackend<'b, B: UhfBackend>(&'b mut B);
impl<'b, B: UhfBackend> BlockSizeUser for GHashBackend<'b, B> {
type BlockSize = B::BlockSize;
}
impl<'b, B: UhfBackend> ParBlocksSizeUser for GHashBackend<'b, B> {
type ParBlocksSize = B::ParBlocksSize;
}
impl<'b, B: UhfBackend> UhfBackend for GHashBackend<'b, B> {
fn proc_block(&mut self, x: &universal_hash::Block<B>) {
let mut x = x.clone();
x.reverse();
self.0.proc_block(&x);
}
}
impl BlockSizeUser for GHash {
type BlockSize = U16;
}
impl UniversalHash for GHash {
fn update_with_backend(&mut self, f: impl UhfClosure<BlockSize = Self::BlockSize>) {
struct GHashClosure<C: UhfClosure>(C);
impl<C: UhfClosure> BlockSizeUser for GHashClosure<C> {
type BlockSize = C::BlockSize;
}
impl<C: UhfClosure> UhfClosure for GHashClosure<C> {
fn call<B: UhfBackend<BlockSize = Self::BlockSize>>(self, backend: &mut B) {
self.0.call(&mut GHashBackend(backend));
}
}
self.0.update_with_backend(GHashClosure(f));
}
/// Get GHASH output
#[inline]
fn finalize(self) -> Tag {
let mut output = self.0.finalize();
output.reverse();
output
}
}
opaque_debug::implement!(GHash);

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vendor/ghash/target/package/tmp-registry/index/gh/as/ghash vendored Normal file
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{"name":"ghash","vers":"0.5.1","deps":[{"name":"opaque-debug","req":"^0.3","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"polyval","req":"^0.6.2","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"zeroize","req":"^1","features":[],"optional":true,"default_features":false,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"hex-literal","req":"^0.3","features":[],"optional":false,"default_features":true,"target":null,"kind":"dev","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false}],"features":{"std":["polyval/std"]},"features2":null,"cksum":"e82fa2d4e86a126b42af9dd9754eaadc5f513a367ba296cf24c767bb74c5cc07","yanked":null,"links":null,"rust_version":null,"v":2}

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vendor/ghash/tests/lib.rs vendored Normal file
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use ghash::{
universal_hash::{KeyInit, UniversalHash},
GHash,
};
use hex_literal::hex;
//
// Test vectors for GHASH from RFC 8452 Appendix A
// <https://tools.ietf.org/html/rfc8452#appendix-A>
//
const H: [u8; 16] = hex!("25629347589242761d31f826ba4b757b");
const X_1: [u8; 16] = hex!("4f4f95668c83dfb6401762bb2d01a262");
const X_2: [u8; 16] = hex!("d1a24ddd2721d006bbe45f20d3c9f362");
/// GHASH(H, X_1, X_2)
const GHASH_RESULT: [u8; 16] = hex!("bd9b3997046731fb96251b91f9c99d7a");
#[test]
fn ghash_test_vector() {
let mut ghash = GHash::new(&H.into());
ghash.update(&[X_1.into(), X_2.into()]);
let result = ghash.finalize();
assert_eq!(&GHASH_RESULT[..], result.as_slice());
}