#sha3 #keccak #crypto #tiny #sha-3

no-std tiny-keccak

An implementation of the FIPS-202-defined SHA-3 and SHAKE functions

15 stable releases

1.4.1 Feb 26, 2018
1.4.0 Nov 24, 2017
1.3.1 Jul 27, 2017
1.2.1 Mar 31, 2017
0.3.0 Nov 27, 2015

#24 in Cryptography

Download history 1815/week @ 2018-06-14 2247/week @ 2018-06-21 2241/week @ 2018-06-28 2501/week @ 2018-07-05 2719/week @ 2018-07-12 3050/week @ 2018-07-19 2148/week @ 2018-07-26 2419/week @ 2018-08-02 2883/week @ 2018-08-09 2582/week @ 2018-08-16 2309/week @ 2018-08-23 2437/week @ 2018-08-30 2561/week @ 2018-09-06

6,986 downloads per month
Used in 63 crates (39 directly)

CC0 license

13KB
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tiny-keccak

An implementation of the FIPS-202-defined SHA-3 and SHAKE functions.

Build Status

Documentation

The Keccak-f[1600] permutation is fully unrolled; it's nearly as fast as the Keccak team's optimized permutation.

Building

cargo build

Usage

Add this to your Cargo.toml:

[dependencies]
tiny-keccak = "1.4.2"

and this to your crate root:

extern crate tiny_keccak;

Example

extern crate tiny_keccak;
use tiny_keccak::Keccak;

fn main() {
    let mut sha3 = Keccak::new_sha3_256();
    let data: Vec<u8> = From::from("hello");
    let data2: Vec<u8> = From::from("world");

    sha3.update(&data);
    sha3.update(&[b' ']);
    sha3.update(&data2);

    let mut res: [u8; 32] = [0; 32];
    sha3.finalize(&mut res);

    let expected: &[u8] = &[
        0x64, 0x4b, 0xcc, 0x7e, 0x56, 0x43, 0x73, 0x04,
        0x09, 0x99, 0xaa, 0xc8, 0x9e, 0x76, 0x22, 0xf3,
        0xca, 0x71, 0xfb, 0xa1, 0xd9, 0x72, 0xfd, 0x94,
        0xa3, 0x1c, 0x3b, 0xfb, 0xf2, 0x4e, 0x39, 0x38
    ];

    assert_eq!(&res, expected);
}

Benchmarks

Benchmarked with rust-crypto sha3 on:

MacBook Pro (Retina, 15-inch, Mid 2015)
2,5 GHz Intel Core i7
16 GB 1600 MHz DDR3
Intel Iris Pro 1536 MB

Benchmark code is available here

running 4 tests
test rust_crypto_sha3_256_input_32_bytes   ... bench:         677 ns/iter (+/- 113) = 47 MB/s
test rust_crypto_sha3_256_input_4096_bytes ... bench:      17,619 ns/iter (+/- 4,174) = 232 MB/s
test tiny_keccak_sha3_256_input_32_bytes   ... bench:         569 ns/iter (+/- 204) = 56 MB/s
test tiny_keccak_sha3_256_input_4096_bytes ... bench:      17,185 ns/iter (+/- 4,575) = 238 MB/s

Why tiny-keccak is twice faster? It's optimized with:

Dependencies