(PHP Extension) Generate ed25519 Key and Save to PuTTY Format

Generates an ED25519 key and saves to PuTTY format.

Note: This example requires Chilkat v9.5.0.83 or greater.

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");

// Note: Requires Chilkat v9.5.0.83 or greater.

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

$key = new CkSshKey();

$success = $key->GenerateEd25519Key();
if ($success != true) {
    print $key->lastErrorText() . "\n";
    exit;
}

// We can optionally set a comment to be included in the exported key.
$key->put_Comment('This is my new ed25519 key.');

// Export the ed25519 private key to unencrypted PuTTY format:
$exportEncrypted = false;
$exportedKey = $key->toPuttyPrivateKey($exportEncrypted);
$success = $key->SaveText($exportedKey,'qa_output/privkey_putty_unencrypted.ppk');

// The unencrypted PuTTY key looks like this:

// 	PuTTY-User-Key-File-2: ssh-ed25519
// 	Encryption: none
// 	Comment: This is my new ed25519 key.
// 	Public-Lines: 2
// 	AAAAC3NzaC1lZDI1NTE5AAAAIJn6m7yKzkAAHXzzjE1zv4RqtdE8r5eTegcpbNDF
// 	OPYs
// 	Private-Lines: 1
// 	AAAAIFgwbZ38AR9Oiw930wsCcCGymQRBa2Y7qBq6R3HCe9VL
// 	Private-MAC: 892573676dd13ef70b6ab7ef219decdfbd5b1857

// Export the ed25519 private key to encrypted PuTTY format:
$key->put_Password('secret');
$exportEncrypted = true;
$exportedKey = $key->toPuttyPrivateKey($exportEncrypted);
$success = $key->SaveText($exportedKey,'qa_output/privkey_putty_encrypted.ppk');

// The encrypted PuTTY key looks like this:

// 	PuTTY-User-Key-File-2: ssh-ed25519
// 	Encryption: aes256-cbc
// 	Comment: This is my new ed25519 key.
// 	Public-Lines: 2
// 	AAAAC3NzaC1lZDI1NTE5AAAAIJn6m7yKzkAAHXzzjE1zv4RqtdE8r5eTegcpbNDF
// 	OPYs
// 	Private-Lines: 1
// 	aIa9mY22htPElPgWhtXesp97662JECxaSsnNqvhD06P+o18immv8ohn73vI/bhQB
// 	Private-MAC: 312221dc90660859fe68df300767f8f779046815

print 'Success!' . "\n";

?>