如何使用PHP发送和接收加密电子邮件

composer require nxenovic/openpgp

use NXenovic\OpenPGP\OpenPGP;

$openpgp = new OpenPGP();

$keyOptions = [
    'name' => 'Your Name',
    'email' => 'your.email@example.com',
    'comment' => 'Your Comment',
    'passphrase' => 'your_passphrase',
];

$keyPair = $openpgp->generateKey($keyOptions);

$publicKey = $keyPair['public'];
$privateKey = $keyPair['private'];

$encryptedMessage = $openpgp->encrypt('Hello, this is an encrypted email!', $publicKey);

$to = 'recipient@example.com';
$subject = 'Encrypted Email';

$headers = "From: Your Name <your.email@example.com>\r\n";
$headers .= "Reply-To: your.email@example.com\r\n";
$headers .= "Content-Type: text/plain; charset=utf-8\r\n";
$headers .= "Content-Transfer-Encoding: 7bit\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "X-Mailer: PHP/" . phpversion();

$message = $encryptedMessage;

if (mail($to, $subject, $message, $headers)) {
    echo "Encrypted email sent successfully!";
} else {
    echo "Failed to send encrypted email.";
}

$encryptedMessage = 'Encrypted email content';
$decryptedMessage = $openpgp->decrypt($encryptedMessage, $privateKey, 'your_passphrase');

echo "Decrypted message: " . $decryptedMessage;