(Node.js) secp256k1 Key Generation and Keccak-256

See more ECC Examples

Note: This example requires Chilkat v11.0.0 or greater.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Create a Fortuna PRNG and seed it with system entropy.
    // This will be our source of random data for generating the ECDSA private key.
    var fortuna = new chilkat.Prng();
    var entropy = fortuna.GetEntropy(32,"base64");
    var success = fortuna.AddEntropy(entropy,"base64");

    var ecc = new chilkat.Ecc();

    // Generate a random ECDSA private key on the secp256k1 curve.
    // privKey: PrivateKey
    var privKey = ecc.GenEccKey("secp256k1",fortuna);
    if (ecc.LastMethodSuccess !== true) {
        console.log(ecc.LastErrorText);
        return;
    }

    console.log("Successfully generated a sec256k1 key.");

    // Show how to compute the Keccak-256 hash in a few ways.
    var sb = new chilkat.StringBuilder();
    sb.Append("hello");

    console.log("keccak-256: " + sb.GetHash("keccak-256","hex_lower","utf-8"));

    // Output:
    // keccak-256: 1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8

    // To keccak-256 hash binary data
    var bd = new chilkat.BinData();
    bd.AppendEncoded("00010203040506","hex");

    console.log("keccak-256: " + bd.GetHash("keccak-256","hex_lower"));

    // Output:
    // keccak-256: 801560412425120fa609be232d6fa71c7f64f42aee7977267687dcc0a2f5aa63

}

chilkatExample();