Package Exports
- @wangshijun/secp256k1-js
- @wangshijun/secp256k1-js/elliptic.js
- @wangshijun/secp256k1-js/index.js
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@wangshijun/secp256k1-js) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
secp256k1-js
This module provides pure javascript implementation of secp256k1, elliptic is used behind the scene
Installation
npm install secp256k1-js
Usage
- API Reference (v4.x) (current version)
Private Key generation, Public Key creation, signature creation, signature verification
const { randomBytes } = require('crypto');
const secp256k1 = require('secp256k1');
// generate message to sign
// message should have 32-byte length, if you have some other length you can hash message
// for example `msg = sha256(rawMessage)`
const msg = randomBytes(32);
// generate privKey
let privKey;
do {
privKey = randomBytes(32);
} while (!secp256k1.privateKeyVerify(privKey));
// get the public key in a compressed format
const pubKey = secp256k1.publicKeyCreate(privKey);
// sign the message
const sigObj = secp256k1.ecdsaSign(msg, privKey);
// verify the signature
console.log(secp256k1.ecdsaVerify(sigObj.signature, msg, pubKey));
// => true
* .verify return false for high signatures
Get X point of ECDH
const { randomBytes } = require('crypto');
const secp256k1 = require('./');
// generate privKey
function getPrivateKey() {
while (true) {
const privKey = randomBytes(32);
if (secp256k1.privateKeyVerify(privKey)) return privKey;
}
}
// generate private and public keys
const privKey = getPrivateKey();
const pubKey = secp256k1.publicKeyCreate(getPrivateKey());
// compressed public key from X and Y
function hashfn(x, y) {
const pubKey = new Uint8Array(33);
pubKey[0] = (y[31] & 1) === 0 ? 0x02 : 0x03;
pubKey.set(x, 1);
return pubKey;
}
// get X point of ecdh
const ecdhPointX = secp256k1.ecdh(pubKey, privKey, { hashfn }, Buffer.alloc(33));
console.log(ecdhPointX.toString('hex'));
LICENSE
This library is free and open-source software released under the MIT license.