ec-sign-js

ECDSA cryptographic signature library for JavaScript.

Elliptic Curve | Hash Algorithm --- | --- P-256(Default) | SHA256(Default) P-384 | SHA384 secp256k1 | SHA256

Requirements

• Node.js 18 or higher

How to install

npm i ec-sign

How to use library

Generate keypair

const sign = require('ec-sign')

// Synchronous
const keypair = sign.SignUtils.generateKeyPairSync('secp224r1');

// Asynchronous
const keypair = await sign.SignUtils.generateKeyPair('secp224r1');

Converts public key to PEM

const pubPem = sign.SignUtils.toPem(keypair.publicKey);

console.info(pubPem);
// -----BEGIN PUBLIC KEY-----
// MFYwEAYHKoZIzj0CAQYFK4EEAAoDQgAEm1eVSAq73aR2Oo8L8rvDzBU214+uhgIj
// MkiasZgxKDJtMbGosVVCPd8drgkr3NrZ1Eqhrf0mveProOsJdaF5Ag==
// -----END PUBLIC KEY-----

Converts private key to PEM

const priPem = sign.SignUtils.toPem(keypair.privateKey);

console.info(priPem);
// -----BEGIN PRIVATE KEY-----
// MIGEAgEAMBAGByqGSM49AgEGBSuBBAAKBG0wawIBAQQgH4RMksnOnI68DAm0PzqQ
// rtS1oznTSsb/pVDQLNPguqShRANCAASbV5VICrvdpHY6jwvyu8PMFTbXj66GAiMy
// SJqxmDEoMm0xsaixVUI93x2uCSvc2tnUSqGt/Sa94+ug6wl1oXkC
// -----END PRIVATE KEY-----

Sign with data and private key

const signer = new sign.Signer(priPem);
const result = signer.sign("hello, message");

console.info(result.timestamp);
// 1688895463045

console.info(result.signature);
// MEYCIQCeYobZ2BIoL7jCV4eGYrT/yXGtNLhEFY2MchsIDGCsywIhAMwak6nBiHgJsNfuY2zSdcX235Xy7Ucj2bGMvFh/xdTy

Verify signature with data, timestamp and public key

const verifier = new sign.Verifier(pubPem);
const valid = verifier.verify("hello, message", result.timestamp, result.signature.toString());

console.info(`signature was verified: ${valid}`);
// signature was verified: true

How to build from source

prerequisites

node.js, npm, git need to be installed.

git clone https://github.com/rising3/ec-sign-js.git
cd ec-sign-js
npm i
npm run test
npm run build

License

Apache 2.0