(PHP ActiveX) secp256k1 Key Generation and Keccak-256

See more ECC Examples

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

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// 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.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Prng')
$fortuna = new COM("Chilkat.Prng");
$entropy = $fortuna->getEntropy(32,'base64');
$success = $fortuna->AddEntropy($entropy,'base64');

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Ecc')
$ecc = new COM("Chilkat.Ecc");

// Generate a random ECDSA private key on the secp256k1 curve.
// privKey is a Chilkat.PrivateKey
$privKey = $ecc->GenEccKey('secp256k1',$fortuna);
if ($ecc->LastMethodSuccess != 1) {
    print $ecc->LastErrorText . "\n";
    exit;
}

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

// Show how to compute the Keccak-256 hash in a few ways.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$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
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$bd = new COM("Chilkat.BinData");
$bd->AppendEncoded('00010203040506','hex');

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

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

?>