(PHP Extension) Generate an ECC Key (Public and Private)

Demonstrates how to generate an ECC key and save both public and private parts.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.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 ECC private key.
$fortuna = new CkPrng();
$entropy = $fortuna->getEntropy(32,'base64');
$success = $fortuna->AddEntropy($entropy,'base64');

$ecc = new CkEcc();

// Generate a random ECC private key on the secp256r1 curve.
// Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256k1.

// privKey is a CkPrivateKey
$privKey = $ecc->GenEccKey('secp256r1',$fortuna);
if ($ecc->get_LastMethodSuccess() == false) {
    print $ecc->lastErrorText() . "\n";
    exit;
}

// Save the private key to PKCS8 encrypted PEM
// (The private key can be saved in a variety of different formats. See the online reference documentation.)
$success = $privKey->SavePkcs8EncryptedPemFile('pemPassword','qa_output/eccPrivKey.pem');
if ($success != true) {
    print $privKey->lastErrorText() . "\n";
}

// The private key PEM looks like this:

// 	-----BEGIN ENCRYPTED PRIVATE KEY-----
// 	MIHFMEAGCSqGSIb3DQEFDTAzMBsGCSqGSIb3DQEFDDAOBAhUmn+1/lwCIwICCAAw
// 	FAYIKoZIhvcNAwcECPlyNXAXZO+oBIGAIvxvTENXJWbrCwSjh0QNxLecBotUpfI5
// 	auOonLmwVMyt1ahMmNyVo/D+pnKQSE41Fg8fApM0DCDKZUOVCCcK1qirIsMPQkGp
// 	klPJbvrQRVYgzBtU31uNB5y2wqhrIeepal1HXBvbkUK0nfJMbcdz/XAEIQu2HhTD
// 	t6LMScPQld4=
// 	-----END ENCRYPTED PRIVATE KEY-----

// Now get the public key part from the private key.
// (A public key is actually a subset of the private key.)
// pubKey is a CkPublicKey
$pubKey = $privKey->GetPublicKey();

// Save the public key to a PEM file.
// (The public key can be saved in a variety of different formats. See the online reference documentation.)
// For ECC keys, the 1st argument (bPreferPkcs1) is ignored and unused.
$bPreferPkcs1 = false;
$success = $pubKey->SavePemFile($bPreferPkcs1,'qa_output/eccPubKey.pem');

// The public key PEM looks like this:

// 	-----BEGIN PUBLIC KEY-----
// 	MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA
// 	AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA////
// 	///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd
// 	NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5
// 	RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA
// 	//////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABGdOH8uM6SfX3mdV+TR0mWp2
// 	gfVRPlxWxwhOiowuNByBxmQz7ZR4CJY1XcN2zkUo5pzW73ZhGwgd2XTOvqPqG40=
// 	-----END PUBLIC KEY-----
// 

print 'finished.' . "\n";

?>