eccrypto-js

eccrypto-js

Pure JavaScript Elliptic curve cryptography library

Description

This library is a port from eccrypto using only pure javascript libraries from ethers.js version 5

NOTE: This library is still experimental and hasn't been thoroughly tested yet

Usage

ECDSA

import * as eccryptoJS from 'eccrypto-js';

const keyPair = eccryptoJS.generateKeyPair();

const str = 'message to sign';
const hash = await eccryptoJS.sha256(str);
const msg = eccryptoJS.hexToBuffer(hash);

const sig = await eccryptoJS.sign(keyPair.privateKey, msg);

await eccryptoJS.verify(keyPair.publicKey, msg, sig);

// verify will throw if signature is BAD

ECDH

import * as eccryptoJS from 'eccrypto-js';

const keyPairA = eccryptoJS.generateKeyPair();
const keyPairB = eccryptoJS.generateKeyPair();

const sharedKey1 = await eccryptoJS.derive(
  keyPairA.privateKey,
  keyPairB.publicKey
);

const sharedKey2 = await eccryptoJS.derive(
  keyPairB.privateKey,
  keyPairA.publicKey
);

// sharedKey1.toString('hex') === sharedKey2.toString('hex')

ECIES

import * as eccryptoJS from 'eccrypto-js';

const keyPair = eccryptoJS.generateKeyPair();

const str = 'message to sign';
const msg = eccryptoJS.utf8ToBuffer(str);

const encrypted = await eccryptoJS.encrypt(keyPairB.publicKey, msg);

const decrypted = await eccryptoJS.decrypt(keyPairB.privateKey, encrypted);

// decrypted.toString() === str

License

MIT License