I am learning how to use Symfony Mailer and am a bit lost on the encrypting message section.
This is my simple code below which works in sending the email.
<?php
require 'vendor/autoload.php';
const FROM = 'me@example.com';
const TO = 'example@email.com';
const SUBJECT = 'My Subject';
const MESSAGE = 'Hello World';
const DSN = 'smtp://localhost:1025';
$transport = \Symfony\Component\Mailer\Transport::fromDsn(DSN);
$mailer = new \Symfony\Component\Mailer\Mailer($transport);
$email = (new \Symfony\Component\Mime\Email())
->from(FROM)
->to(TO)
->subject(SUBJECT)
->text(MESSAGE);
$encrypter = new \Symfony\Component\Mime\Crypto\SMimeEncrypter('my-certificate.crt');
$encryptedEmail = $encrypter->encrypt($email);
try {
$mailer->send($encryptedEmail);
} catch (\Symfony\Component\Mailer\Exception\TransportExceptionInterface $error) {
echo 'Unable to send email' . PHP_EOL;
}
And this is how I generated the certificate and key...
openssl genrsa -aes256 -out my-certificate.key 4096
openssl req -new -x509 -days 29220 -key my-certificate.key -out my-certificate.crt
I am able to receive the email using SMTP tools like Mailpit.
My two questions are...
- My emails are encrypted using the certificate, but shouldn't it be done using PGP?
- How do I decrypt the email with SMTP testing tool or any online or CLI tool? I tried to decrypt the email and could not decrypt it even though I have all of the keys.