PHP

Load an Encrypted Private Key from PEM Text

Demonstrates the Chilkat PrivateKey.LoadEncryptedPem method, which loads a private key from PEM text, using a password when the PEM is encrypted. The first argument is the PEM string and the second is the password. Unencrypted PEM is also accepted.

Background: An encrypted PEM protects the key material at rest — a stolen file is useless without the passphrase — which is why encrypted keys are preferred for anything shipped or stored. This loader supplies that passphrase to decrypt a BEGIN ENCRYPTED PRIVATE KEY block (and gracefully handles unencrypted PEM too), so it is a safe default when a PEM might be either. The password should come from a secure source, never a hard-coded literal.

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<?php

use Chilkat2\PrivateKey;

// Demonstrates the PrivateKey.LoadEncryptedPem method, which loads a private key from PEM text.
// The 1st argument is the PEM string and the 2nd is the password (used when the PEM is
// encrypted).  Unencrypted PEM is also accepted.

$privKey = new PrivateKey();

// The PEM text of an encrypted private key.
$pemText = "-----BEGIN ENCRYPTED PRIVATE KEY-----\nMIIFHzBJ...\n-----END ENCRYPTED PRIVATE KEY-----";

// The key password is not hard-coded in a real application; obtain it from an interactive
// prompt, environment variable, or a secrets vault.
$password = 'myKeyPassword';

try {
    $privKey->LoadEncryptedPem($pemText, $password);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'Loaded a ', $privKey->KeyType, " private key.\n";