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sha384

Apache-2.0Release 1L3

SHA-384 (FIPS 180-4 §6.5) — thin wrapper over sha512 with a distinct IV + 12-word truncation.

Module sha384 | Source packages/front/fw/src/crypto/hash/sha384.js | Deps sha512 | Worker-safe yes

14-LOC wrapper over sha512._internal.makeSha(_INIT_384, 12). Previously this module duplicated ~120 LOC of the compression function — refactored in the post-upgrade audit.

Resolve

const sha384 = runtime.resolve('sha384');
// Returns: { fn, hash } (digest 12 words = 384 bits)

API

Method Signature Returns
hash (data: string | bitArray) => bitArray Digest 12 words × 32 bits = 384 bits
fn constructor() Streaming instance compatible with HMAC (blockSize 1024)

Examples

const { sha384, hex, bitArray } = fw.runtime.resolveAll(['sha384', 'hex', 'bitArray']);
hex.fromBytes(bitArray.ba_to_ui8(sha384.hash('abc')));
// "cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed8086072ba1e7cc2358baeca134c825a7"

Worker Usage

const worker = fw.createWorker(
    function ({ libs, args }) { self.postMessage(libs.sha384.hash(args[0])); },
    { dependencies: ['sha384'], args: ['abc'] }
);

Notes

  • Block size: 1024 bits (identical to SHA-512, required by HMAC-SHA-384).
  • LDT 1 GiB gated behind CRYPTO_FULL=1.

See also