Sha2Ni

Sha2 implemention in Rust, aimed at performance. Forked from Sha2.

License

Dual-licensed under Apache 2.0 and MIT terms:

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

lib.rs:

An implementation of the SHA-2 cryptographic hash algorithms.

There are 6 standard algorithms specified in the SHA-2 standard:

• Sha224, which is the 32-bit Sha256 algorithm with the result truncated to 224 bits.
• Sha256, which is the 32-bit Sha256 algorithm.
• Sha384, which is the 64-bit Sha512 algorithm with the result truncated to 384 bits.
• Sha512, which is the 64-bit Sha512 algorithm.
• Sha512Trunc224, which is the 64-bit Sha512 algorithm with the result truncated to 224 bits.
• Sha512Trunc256, which is the 64-bit Sha512 algorithm with the result truncated to 256 bits.

Algorithmically, there are only 2 core algorithms: Sha256 and Sha512. All other algorithms are just applications of these with different initial hash values, and truncated to different digest bit lengths.

Usage

use sha2ni::{Sha256, Sha512, Digest};

// create a Sha256 object
let mut hasher = Sha256::new();

// write input message
hasher.input(b"hello world");

// read hash digest and consume hasher
let result = hasher.result();

assert_eq!(result[..], hex!("
    b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9
")[..]);

// same for Sha512
let mut hasher = Sha512::new();
hasher.input(b"hello world");
let result = hasher.result();

assert_eq!(result[..], hex!("
    309ecc489c12d6eb4cc40f50c902f2b4d0ed77ee511a7c7a9bcd3ca86d4cd86f
    989dd35bc5ff499670da34255b45b0cfd830e81f605dcf7dc5542e93ae9cd76f
")[..]);

Also see RustCrypto/hashes readme.