ecies-lite/test.js

A lightweight ECIES tool implemented in pure Node.JS

const crypto = require('crypto'),
    ecies = require('.');

let recEcdh = crypto.createECDH(`secp256k1`);
recEcdh.generateKeys();
let body = ecies.encrypt(recEcdh.getPublicKey(), Buffer.from('This message is encrypted by ecies-lite with default parameters'));
for (const k of Object.keys(body)) {
    console.log(`${k} (${body[k].length}B):`, body[k].toString('base64'));
}
console.log(`Decrypted plaintext: '${ecies.decrypt(recEcdh.getPrivateKey(), body).toString('utf-8')}'`);

const curveName = 'prime256v1';
recEcdh = crypto.createECDH(curveName);
recEcdh.generateKeys();
const ephemEcdh = crypto.createECDH(curveName);
ephemEcdh.generateKeys();
const macKeyGen = (bytes) => {
    let buf = Buffer.from(bytes);
    for (let [index, value] of buf.entries()) {
        buf[index] = value ^ index;
    }
    return buf;    
}
ecies.config({curveName, macKeyGen});
body = ecies.encrypt(recEcdh.getPublicKey(), Buffer.from('This message is encrypted by ecies-lite with customized options'), {esk: ephemEcdh.getPrivateKey()});
for (const k of Object.keys(body)) {
    console.log(`${k} (${body[k].length}B):`, body[k].toString('base64'));
}
console.log(`Decrypted plaintext: '${ecies.decrypt(recEcdh.getPrivateKey(), body).toString('utf-8')}'`);