keccak-p-js

A sha-3 winner Keccak-p implementation in JavaScript

Getting the Code

To get a local copy of the current code, clone it using git:

$ git clone git://github.com/jeffallen6767/keccak-p-js.git
$ cd keccak-p-js

If everything worked out, install all dependencies:

$ npm install

Run the tests:

$ npm run tests

Use it in you own project:

$ npm install git://github.com/jeffallen6767/keccak-p-js.git --save

or

$ npm install https://github.com/jeffallen6767/keccak-p-js.git --save

Use it in your code ( see test.js for in-depth examples and details ):

var keccak = require("keccak-p-js");

// sync example:
var hash = keccak.mode("SHA-3-256").init().update("abc").digest();
console.log("sync SHA-3-256 of abc is ", hash);

// async example:
keccak.mode("SHA-3-256", function(mode) {
  mode.init(function(input) {
    input.update("abc", function(output) {
      output.digest(function(hash) {
        console.log("async SHA-3-256 of abc is ", hash);
      });
    });
  });
});

Supports the following modes:

SHA-3-224
SHA-3-256
SHA-3-384
SHA-3-512

and

SHAKE-128
SHAKE-256

How to SHAKE-n:

• create an instance using a valid shake mode
• update the instance with input to be hashed
• call instance.digest(n-bytes) 1..n times to create n bytes of hash

var shake = keccak.mode("SHAKE-256").init().update("abc"),
  hash = [
    shake.digest(32),
    shake.digest(16),
    shake.digest(8),
    shake.digest(5),
    shake.digest(3)
  ].join("");

console.log("sync 64 bytes of SHAKE-256 of abc is ", hash);