Node.js

secp256k1 Key Generation and Keccak-256

See more ECC Examples

Starting in v11.0.0, Chilkat supports both secp256k1 key generation and Keccak-256 directly. These algorithms are typically used for Bitcoin and Ethereum. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    // 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");
    success = fortuna.AddEntropy(entropy,"base64");

    var ecc = new chilkat.Ecc();

    // Generate a random ECDSA private key on the secp256k1 curve.
    var privKey = new chilkat.PrivateKey();
    success = ecc.GenKey("secp256k1",fortuna,privKey);
    if (success == false) {
        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();