PHP

Set the Decryption Certificate and Private Key

Demonstrates the Chilkat Email.SetDecryptCert2 method, which explicitly provides a certificate and its corresponding private key as separate objects for decrypting a received encrypted email. Set them before loading the encrypted message. This example loads a .cer certificate and a PEM private key, sets both, then loads an encrypted email.

Background: Sometimes the certificate and its private key are stored separately — a public .cer file plus a PEM (or other format) key file — rather than combined in a PFX. SetDecryptCert2 accepts the two objects individually, which is the natural fit for that arrangement. It is the two-object counterpart to SetDecryptCert, which takes a single certificate that already carries its private key.

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<?php

use Chilkat2\Cert;
use Chilkat2\Email;
use Chilkat2\PrivateKey;

// Demonstrates the SetDecryptCert2 method, which explicitly provides a certificate and its
// corresponding private key (as separate objects) for decrypting a received encrypted
// email.  Set them before loading the encrypted email.

$email = new Email();

// Load the certificate (public) and the matching private key from separate files.
$cert = new Cert();
try {
    $cert->LoadFromFile('qa_data/certs/recipient.cer');

    $privKey = new PrivateKey();
    $privKey->LoadPemFile('qa_data/certs/recipient_privkey.pem');

    // Provide the certificate and private key to use for decryption.
    $email->SetDecryptCert2($cert, $privKey);

    // Load the encrypted email; Chilkat decrypts it using the certificate and key.
    $email->LoadEml('qa_data/eml/encrypted.eml');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'Decrypted = ', ($email->Decrypted ? 'true' : 'false'), "\n";

// Note: Paths such as "qa_data/..." are relative local filesystem paths,
// relative to the current working directory of the running application.