decrypt-tweetnacl.js

decrypt-tweetnacl.js

const nacl = require('tweetnacl')
nacl.util = require('tweetnacl-util')

// reading Alice key pair from secret key
const alice = nacl.box.keyPair.fromSecretKey(/* Uint8Array with 32-byte secret key */)
// reading Bob public key
const bob = {publicKey: /* Uint8Array with 32-byte secret key */}
             
// const message = ... the message object from Bob
// Alice decrypts message from Bob
const payload = nacl.box.open(message.box, message.nonce, bob.publicKey, alice.secretKey)
const utf8 = nacl.util.encodeUTF8(payload) // <-- 'Hello Alice'