SHA-256 implementation in JavaScript with typed arrays that works in modern browsers and Node.js. Implements the hash function, HMAC, and PBKDF2.

Public domain. No warranty.

You can install fast-sha256-js via a package manager:

Bower:

$ bower install fast-sha256

NPM:

$ npm install fast-sha256

or download source code.

Functions accept and return Uint8Arrays. To convert strings, use external library (for example, nacl.util).

Returns a SHA-256 hash of the message.

Returns an HMAC-SHA-256 of the message for the key.

Returns a key of length dkLen derived using PBKDF2-HMAC-SHA256 from the given password, salt, and the number of rounds.

Install development dependencies:

$ npm install

Run tests:

$ npm test

Run tests on different source file:

$ SHA256_SRC=sha256.min.js npm test

Run benchmark:

$ npm run bench

(or in a browser, open tests/bench.html).

Build minified version:

$ npm run build

While this implementation is pretty fast compared to previous generation implementations, if you need a faster one, check out asmCrypto.