@w3bstream/w3bstream-http-client-simulator/dist/SimulatorSigner/index.js

[](https://www.npmjs.com/package/@w3bstream/w3bstream-http-client-simulator)

import crypto from "crypto";
import Elliptic from "elliptic";
const ec = new Elliptic.ec("p256");
export class SimulatorSigner {
    static sign(message, pk) {
        const hash = SimulatorSigner.msgToHash(message);
        const ecPrivateKey = ec.keyFromPrivate(pk, "hex");
        const signature = ecPrivateKey.sign(hash);
        return signature.toDER("hex");
    }
    static verify(message, signature, pubK) {
        const hash = SimulatorSigner.msgToHash(message);
        const ecPublicKey = ec.keyFromPublic(pubK, "hex");
        return ecPublicKey.verify(hash, signature);
    }
    static msgToHash(message) {
        return crypto.createHash("sha256").update(message).digest();
    }
}