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SHA-512

Algorithm​

SHA-512 (FIPS 180-4) uses a 1024-bit block and produces a 512-bit digest. SHA-384 is the same core with a truncated output (first 384 bits); it is common in TLS cipher suites and certificates that specify SHA-384.

Purpose​

SHA-512 and SHA-384 (SHA-512/256) for long-output digests and SHA-384 TLS profiles.

Rust API​

  • Crate: noxtls-crypto
  • Module path (conceptual): noxtls_crypto::hash
  • Primary symbols:
    • noxtls_sha512
    • noxtls_sha384
    • Sha512
    • Digest

Functions and types:

  • noxtls_sha512(data) -> [u8; 64] / noxtls_sha384(data) -> [u8; 48] - Parameters: data is the full input byte slice. Behavior: computes one-shot SHA-512 or SHA-384 digests. Returns: fixed-size digest arrays (64 or 48 bytes).
  • Sha512 - Parameters: feed data through repeated update(&[u8]) calls, then call finalize(). Behavior: provides incremental hashing for large/chunked messages. Returns: finalize() emits digest bytes as Vec<u8>.

Feature flags and policy​

Default.

Examples​

use noxtls_crypto::{noxtls_sha512, noxtls_sha384, Digest, Sha512};

let d512 = noxtls_sha512(b"message");
assert_eq!(d512.len(), 64);

let d384 = noxtls_sha384(b"message");
assert_eq!(d384.len(), 48);

let mut h = Sha512::new();
h.update(b"stream");
let out = h.finalize();

Security and compatibility​

Prefer SHA-256 unless you need SHA-384-sized outputs or protocol-required SHA-512.