Encryption and decryption streams of libsodium's chacha20 implementation.
This module provides encryption and decryption streams for the sodium chacha20 implementation. It can be used to encrypt channels using a key already known to both sides.
It manages communicating the stream nonce to the remote side, which is transmitted in plaintext. This is safe information to leak (the nonce is used to detect replay attacks).
const chacha = require('chacha-stream')
const through = require('through2')
const crypto = require('crypto')
function printer (prefix) {
return through(function (chunk, enc, next) {
console.log(prefix, chunk.toString())
next(null, chunk)
})
}
let key = crypto.randomBytes(32)
let encode0 = chacha.encoder(key)
let decode0 = chacha.decoder(key)
encode0.write('hello world')
encode0.pipe(printer('encrypted')).pipe(decode0).pipe(printer('decrypted'))
outputs
encrypted }�?�lx
encrypted z>��Un��4�
decrypted hello world
var chacha = require('chacha-stream')
Creates a Transform stream that accepts plaintexts written to it, and outputs encrypted ciphertext.
key
is a 32-byte Buffer
.
Creates a Transform stream that accepts ciphertext written to it, and outputs decrypted plaintext.
key
is a 32-byte Buffer
.
With npm installed, run
$ npm install chacha-stream
ISC