Pure Rust implementation of the SHA-2 cryptographic hash algorithms.
There are 6 standard algorithms specified in the SHA-2 standard:
Sha224, Sha256, Sha512_224, Sha512_256, Sha384, and Sha512.
Algorithmically, there are only 2 core algorithms: SHA-256 and SHA-512. All other algorithms are just applications of these with different initial hash values, and truncated to different digest bit lengths. The first two algorithms in the list are based on SHA-256, while the last four are based on SHA-512.
use sha2::{Sha256, Digest};
use hex_literal::hex;
let hash = Sha256::digest(b"hello world");
assert_eq!(hash, hex!("b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"));
// Hex-encode hash using https://docs.rs/base16ct
let hex_hash = base16ct::lower::encode_string(&hash);
assert_eq!(hex_hash, "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9");use sha2::{Sha256, Sha512, Digest};
use hex_literal::hex;
let mut hasher = Sha256::new();
hasher.update(b"hello ");
hasher.update(b"world");
let hash256 = hasher.finalize();
assert_eq!(hash256, hex!("b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"));
let mut hasher = Sha512::new();
hasher.update(b"hello world");
let hash512 = hasher.finalize();
assert_eq!(hash512, hex!(
"309ecc489c12d6eb4cc40f50c902f2b4d0ed77ee511a7c7a9bcd3ca86d4cd86f"
"989dd35bc5ff499670da34255b45b0cfd830e81f605dcf7dc5542e93ae9cd76f"
));Also, see the examples section in the RustCrypto/hashes readme.
Rust 1.81 or higher.
Minimum supported Rust version can be changed in the future, but it will be done with a minor version bump.
- All on-by-default features of this library are covered by SemVer
- MSRV is considered exempt from SemVer as noted above
The crate is licensed under either of:
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.