PHP ActiveX

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. PHP ActiveX

<?php

$success = 0;

// 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.
$fortuna = new COM("Chilkat.Prng");
$entropy = $fortuna->getEntropy(32,'base64');
$success = $fortuna->AddEntropy($entropy,'base64');

$ecc = new COM("Chilkat.Ecc");

// Generate a random ECDSA private key on the secp256k1 curve.
$privKey = new COM("Chilkat.PrivateKey");
$success = $ecc->GenKey('secp256k1',$fortuna,$privKey);
if ($success == 0) {
    print $ecc->LastErrorText . "\n";
    exit;
}

print 'Successfully generated a sec256k1 key.' . "\n";

// Show how to compute the Keccak-256 hash in a few ways.
$sb = new COM("Chilkat.StringBuilder");
$sb->Append('hello');

print 'keccak-256: ' . $sb->getHash('keccak-256','hex_lower','utf-8') . "\n";

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

// To keccak-256 hash binary data
$bd = new COM("Chilkat.BinData");
$bd->AppendEncoded('00010203040506','hex');

print 'keccak-256: ' . $bd->getHash('keccak-256','hex_lower') . "\n";

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

?>