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ascon: import crate sources (#30)

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Imports the source code of the `ascon` crate originally from:

https://github.com/quininer/ascon

Code is imported as of this commit:

    commit 997e51ff0cad48510ad31934f9c361d25bf5f938
    Author: quininer kel <quininer@live.com>
    Date:   Mon Feb 20 09:52:28 2017 +0800

        refactor: remove no_std

- Formatted code using rustfmt 1.5.1-stable (d5a82bbd 2023-02-07)
- Fixed clippy nits from clippy 0.1.67 (d5a82bbd 2023-02-07)

Dual licensed as Apache 2.0 + MIT

Permission given here:

https://github.com/RustCrypto/sponges/pull/30#discussion_r1103554334

Co-authored-by: quininer kel <quininer@live.com>
This commit is contained in:
Tony Arcieri 2023-02-11 10:34:01 -07:00 committed by GitHub
parent 2d2be3511a
commit dac6767968
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GPG Key ID: 4AEE18F83AFDEB23
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59
.github/workflows/ascon.yml vendored Normal file
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name: ascon
on:
pull_request:
paths:
- ".github/workflows/ascon.yml"
- "ascon/**"
- "Cargo.*"
push:
branches: master
defaults:
run:
working-directory: ascon
env:
RUSTFLAGS: "-Dwarnings"
CARGO_INCREMENTAL: 0
jobs:
set-msrv:
uses: RustCrypto/actions/.github/workflows/set-msrv.yml@master
with:
msrv: 1.41.0
benches:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- uses: RustCrypto/actions/cargo-cache@master
- uses: actions-rs/toolchain@v1
with:
profile: minimal
toolchain: nightly-2023-02-01
override: true
- run: cargo build --benches
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@v3
- uses: RustCrypto/actions/cargo-cache@master
- uses: actions-rs/toolchain@v1
with:
profile: minimal
toolchain: ${{ matrix.rust }}
override: true
- run: cargo test

13
Cargo.lock generated
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# It is not intended for manual editing.
version = 3
[[package]]
name = "ascon"
version = "0.1.4"
dependencies = [
"byteorder",
]
[[package]]
name = "byteorder"
version = "1.4.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
[[package]]
name = "cpufeatures"
version = "0.2.5"

1
Cargo.toml
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[workspace]
members = [
"ascon",
"keccak",
]

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ascon/Cargo.toml Normal file
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[package]
name = "ascon"
version = "0.1.4"
authors = ["quininer kel <quininer@live.com>"]
description = "A implementation of ASCON authenticated encryption."
repository = "https://github.com/quininer/ascon"
license = "Apache-2.0 OR MIT"
[dependencies]
byteorder = { version = "1.0", default-features = false }

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ascon/LICENSE-APACHE Normal file
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Copyright (c) 2016-2023 quininer kel, RustCrypto Developers
Licensed under the Apache License, Version 2.0 (the "License");
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25
ascon/LICENSE-MIT Normal file
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Copyright (c) 2016-2023 quininer kel, RustCrypto Developers
Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. 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.

7
ascon/README.md Normal file
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ASCON
-----
A implementation of [ASCON](http://ascon.iaik.tugraz.at) authenticated encryption.
* [CAESAR competition](http://competitions.cr.yp.to/caesar.html)
* [Ascon Analysis](http://ascon.iaik.tugraz.at/analysis.html)

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ascon/benches/bench.rs Normal file
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#![feature(test)]
extern crate ascon;
extern crate test;
use ascon::{aead_decrypt, aead_encrypt};
use test::Bencher;
#[bench]
fn ascon_encrypt_bench(b: &mut Bencher) {
let key = [4; 16];
let iv = [8; 16];
let aad = [3; 16];
let message = [99; 1025];
b.bytes = message.len() as u64;
b.iter(|| aead_encrypt(&key, &iv, &message, &aad));
}
#[bench]
fn ascon_decrypt_bench(b: &mut Bencher) {
let key = [4; 16];
let iv = [8; 16];
let aad = [3; 16];
let message = [99; 1025];
let (ciphertext, tag) = aead_encrypt(&key, &iv, &message, &aad);
b.bytes = message.len() as u64;
b.iter(|| aead_decrypt(&key, &iv, &ciphertext, &aad, &tag));
}

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extern crate byteorder;
mod ops;
mod util;
use ops::{finalization, initialization, permutation, process_aad};
const KEY_LEN: usize = 16;
const S_SIZE: usize = 320 / 8;
const RATE: usize = 128 / 8;
const A: usize = 12;
const B: usize = 8;
#[derive(Debug)]
pub enum DecryptFail {
TagLengthError,
AuthenticationFail,
}
pub fn aead_encrypt(key: &[u8], iv: &[u8], message: &[u8], aad: &[u8]) -> (Vec<u8>, [u8; KEY_LEN]) {
let s = aad.len() / RATE + 1;
let t = message.len() / RATE + 1;
let l = message.len() % RATE;
let mut ss = [0; S_SIZE];
let mut aa = vec![0; s * RATE];
let mut mm = vec![0; t * RATE];
let mut output = vec![0; message.len()];
let mut tag = [0; KEY_LEN];
// pad aad
aa[..aad.len()].copy_from_slice(aad);
aa[aad.len()] = 0x80;
// pad message
mm[..message.len()].copy_from_slice(message);
mm[message.len()] = 0x80;
// init
initialization(&mut ss, key, iv);
// aad
if !aad.is_empty() {
process_aad(&mut ss, &aa, s);
}
ss[S_SIZE - 1] ^= 1;
// plaintext
for i in 0..(t - 1) {
for j in 0..RATE {
ss[j] ^= mm[i * RATE + j];
}
output[(i * RATE)..(i * RATE + RATE)].copy_from_slice(&ss[..RATE]);
permutation(&mut ss, 12 - B, B);
}
for j in 0..RATE {
ss[j] ^= mm[(t - 1) * RATE + j];
}
for j in 0..l {
output[(t - 1) * RATE + j] = ss[j];
}
// finalization
finalization(&mut ss, key);
// tag
tag.copy_from_slice(&ss[S_SIZE - KEY_LEN..]);
(output, tag)
}
pub fn aead_decrypt(
key: &[u8],
iv: &[u8],
ciphertext: &[u8],
aad: &[u8],
tag: &[u8],
) -> Result<Vec<u8>, DecryptFail> {
if tag.len() != KEY_LEN {
Err(DecryptFail::TagLengthError)?
};
let s = aad.len() / RATE + 1;
let t = ciphertext.len() / RATE + 1;
let l = ciphertext.len() % RATE;
let mut ss = [0; S_SIZE];
let mut aa = vec![0; s * RATE];
let mut mm = vec![0; t * RATE];
// pad aad
aa[..aad.len()].copy_from_slice(aad);
aa[aad.len()] = 0x80;
// init
initialization(&mut ss, key, iv);
// aad
if !aad.is_empty() {
process_aad(&mut ss, &aa, s);
}
ss[S_SIZE - 1] ^= 1;
// ciphertext
for i in 0..(t - 1) {
for j in 0..RATE {
mm[i * RATE + j] = ss[j] ^ ciphertext[i * RATE + j];
}
ss[..RATE].copy_from_slice(&ciphertext[(i * RATE)..(i * RATE + RATE)]);
permutation(&mut ss, 12 - B, B);
}
for j in 0..l {
mm[(t - 1) * RATE + j] = ss[j] ^ ciphertext[(t - 1) * RATE + j];
}
for j in 0..l {
ss[j] = ciphertext[(t - 1) * RATE + j];
}
ss[l] ^= 0x80;
// finalization
finalization(&mut ss, key);
if util::eq(&ss[S_SIZE - KEY_LEN..], tag) {
Ok(mm[..ciphertext.len()].into())
} else {
Err(DecryptFail::AuthenticationFail)
}
}
#[test]
fn ascon_test() {
let key = [0; 16];
let iv = [0; 16];
let aad = [0; 16];
let message = [0; 64];
let (ciphertext, tag) = aead_encrypt(&key, &iv, &message, &aad);
let plaintext = aead_decrypt(&key, &iv, &ciphertext, &aad, &tag).unwrap();
assert_eq!(plaintext, &message[..]);
assert!(util::eq(&message, &plaintext));
}
#[test]
fn ascon_tv_test() {
let key = [0; 16];
let iv = [0; 16];
let aad = b"ASCON";
let message = b"ascon";
let (ciphertext, tag) = aead_encrypt(&key, &iv, message, aad);
assert_eq!(ciphertext, [0x4c, 0x8c, 0x42, 0x89, 0x49]);
assert_eq!(
tag,
[
0x65, 0xfd, 0x17, 0xb6, 0xd3, 0x0c, 0xd8, 0x76, 0xa0, 0x5a, 0x8e, 0xfc, 0xec, 0xad,
0x99, 0x3a
]
);
let plaintext = aead_decrypt(&key, &iv, &ciphertext, aad, &tag).unwrap();
assert_eq!(plaintext, message);
}

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use util::{u64_to_u8, u8_to_u64};
pub fn permutation(s: &mut [u8], start: usize, rounds: usize) {
let mut x = [0; 5];
let mut t = [0; 5];
u8_to_u64(s, &mut x);
for i in start as u64..(start + rounds) as u64 {
x[2] ^= ((0xfu64 - i) << 4) | i;
x[0] ^= x[4];
x[4] ^= x[3];
x[2] ^= x[1];
t[0] = x[0];
t[1] = x[1];
t[2] = x[2];
t[3] = x[3];
t[4] = x[4];
t[0] = !t[0];
t[1] = !t[1];
t[2] = !t[2];
t[3] = !t[3];
t[4] = !t[4];
t[0] &= x[1];
t[1] &= x[2];
t[2] &= x[3];
t[3] &= x[4];
t[4] &= x[0];
x[0] ^= t[1];
x[1] ^= t[2];
x[2] ^= t[3];
x[3] ^= t[4];
x[4] ^= t[0];
x[1] ^= x[0];
x[0] ^= x[4];
x[3] ^= x[2];
x[2] = !x[2];
x[0] ^= x[0].rotate_right(19) ^ x[0].rotate_right(28);
x[1] ^= x[1].rotate_right(61) ^ x[1].rotate_right(39);
x[2] ^= x[2].rotate_right(1) ^ x[2].rotate_right(6);
x[3] ^= x[3].rotate_right(10) ^ x[3].rotate_right(17);
x[4] ^= x[4].rotate_right(7) ^ x[4].rotate_right(41);
}
u64_to_u8(&x, s);
}
pub fn initialization(s: &mut [u8], key: &[u8], nonce: &[u8]) {
s[0] = ::KEY_LEN as u8 * 8;
s[1] = ::RATE as u8 * 8;
s[2] = ::A as u8;
s[3] = ::B as u8;
let mut pos = ::S_SIZE - 2 * ::KEY_LEN;
s[pos..pos + key.len()].copy_from_slice(key);
pos += ::KEY_LEN;
s[pos..pos + nonce.len()].copy_from_slice(nonce);
permutation(s, 12 - ::A, ::A);
for (i, &b) in key.iter().enumerate() {
s[pos + i] ^= b;
}
}
pub fn finalization(s: &mut [u8], key: &[u8]) {
for (i, &b) in key.iter().enumerate() {
s[::RATE + i] ^= b;
}
permutation(s, 12 - ::A, ::A);
for (i, &b) in key.iter().enumerate() {
s[::S_SIZE - ::KEY_LEN + i] ^= b;
}
}
pub fn process_aad(ss: &mut [u8], aa: &[u8], s: usize) {
for i in 0..s {
for j in 0..::RATE {
ss[j] ^= aa[i * ::RATE + j];
}
permutation(ss, 12 - ::B, ::B);
}
}

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use byteorder::{BigEndian, ByteOrder};
pub type Endian = BigEndian;
#[inline]
pub fn u8_to_u64(input: &[u8], output: &mut [u64]) {
for (i, b) in output.iter_mut().enumerate() {
*b = Endian::read_u64(&input[(i * 8)..((i + 1) * 8)]);
}
}
#[inline]
pub fn u64_to_u8(input: &[u64], output: &mut [u8]) {
for (i, &b) in input.iter().enumerate() {
Endian::write_u64(&mut output[(i * 8)..((i + 1) * 8)], b)
}
}
pub fn eq(a: &[u8], b: &[u8]) -> bool {
if a.len() != b.len() {
false
} else {
a.iter()
.zip(b)
.map(|(x, y)| x ^ y)
.fold(0, |sum, next| sum | next)
.eq(&0)
}
}