purekeccak

Version

This module provides pure javascript implementations to Keccak sponge function family from Keccak Code Package.

Usage

You can use this package as node Hash.

const createKeccakHash = require('keccak')

console.log(createKeccakHash('keccak256').digest().toString('hex'))
// => c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470

console.log(createKeccakHash('keccak256').update('Hello world!').digest('hex'))
// => ecd0e108a98e192af1d2c25055f4e3bed784b5c877204e73219a5203251feaab

Also object has two useful methods: _resetState and _clone

const createKeccakHash = require('keccak')

console.log(createKeccakHash('keccak256').update('Hello World!')._resetState().digest('hex'))
// => c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470

const hash1 = createKeccakHash('keccak256').update('Hello')
const hash2 = hash1._clone()
console.log(hash1.digest('hex'))
// => 06b3dfaec148fb1bb2b066f10ec285e7c9bf402ab32aa78a5d38e34566810cd2
console.log(hash1.update(' world!').digest('hex'))
// => throw Error: Digest already called
console.log(hash2.update(' world!').digest('hex'))
// => ecd0e108a98e192af1d2c25055f4e3bed784b5c877204e73219a5203251feaab

Why I should use this package?

I thought it will be popular question, so I decide write explanation in readme.

I know a few popular packages on npm related with Keccak:

• sha3 (phusion/node-sha3 on github) — not actual because support only keccak.
• js-sha3 (emn178/js-sha3 on github) — brilliant package which support keccak, sha3, shake. But not implement node Hash interface unfortunately!
• browserify-sha3 (wanderer/browserify-sha3 on github) — based on js-sha3 (but not support shake!). Support node Hash interface, but without streams.
• keccakjs (axic/keccakjs on github) — uses sha3 and browserify-sha3 as fallback. As result keccak only with node Hash interface without streams.

LICENSE

This library is free and open-source software released under the MIT license.