PHP Extension

Convert PuTTY Private Key (ppk) to OpenSSH (pem)

See more SSH Key Examples

Convert a PuTTY format private key file (.ppk) to OpenSSH (.pem). PHP Extension

<?php

include("chilkat.php");

$success = false;

$key = new CkSshKey();

// Load an unencrypted or encrypted PuTTY private key.

// If  your PuTTY private key is encrypted, set the Password
// property before calling FromPuttyPrivateKey.
// If your PuTTY private key is not encrypted, it makes no diffference
// if Password is set or not set.
$key->put_Password('secret');

// First load the .ppk file into a string:

$keyStr = $key->loadText('putty_private_key.ppk');

// Import into the SSH key object:
$success = $key->FromPuttyPrivateKey($keyStr);
if ($success != true) {
    print $key->lastErrorText() . "\n";
    exit;
}

// Convert to an encrypted or unencrypted OpenSSH key.

// First demonstrate converting to an unencrypted OpenSSH key

$bEncrypt = false;
$unencryptedKeyStr = $key->toOpenSshPrivateKey($bEncrypt);
$success = $key->SaveText($unencryptedKeyStr,'unencrypted_openssh.pem');
if ($success != true) {
    print $key->lastErrorText() . "\n";
    exit;
}

// Save to an encrypted OpenSSH PEM file:

$bEncrypt = true;
$key->put_Password('myPassword');
$encryptedKeyStr = $key->toOpenSshPrivateKey($bEncrypt);
$success = $key->SaveText($encryptedKeyStr,'encrypted_openssh.pem');
if ($success != true) {
    print $key->lastErrorText() . "\n";
    exit;
}

print 'Done!' . "\n";

?>