const crypto = require('crypto');
 
function encryptCardDetails(cardData, publicKey) {
  // Generate reference with prefix and timestamp
  const reference = `COR_${Date.now()}`;
  
  // Use first 16 chars of reference as IV
  const iv = reference.slice(0, 16);
  
  // Prepare the encryption key
  const key = Buffer.from(publicKey, 'utf-8');
  const ivBuffer = Buffer.from(iv, 'utf-8');
  
  try {
    // Create cipher
    const cipher = crypto.createCipheriv('aes-256-cbc', key, ivBuffer);
    
    // Encrypt the data
    let encrypted = cipher.update(JSON.stringify(cardData), 'utf8', 'hex');
    encrypted += cipher.final('hex');
    
    return {
      encryptedData: encrypted,
      reference: reference
    };
  } catch (error) {
    throw new Error(`Encryption failed: ${error.message}`);
  }
}
 
// Usage example
const cardData = {
  number: "4242424242424242",
  cvv: "123",
  expiryMonth: "12",
  expiryYear: "23",  // 2 digits format
  pin: "1234"
};
 
const result = encryptCardDetails(cardData, 'YOUR_PUBLIC_KEY');
console.log(result);

function encryptCardDetails($cardData, $publicKey) {
  // Generate reference with prefix and timestamp
  $reference = "COR_" . time();
  
  // Use first 16 chars of reference as IV
  $iv = substr($reference, 0, 16);
  
  try {
    // Encrypt the data
    $encrypted = openssl_encrypt(
      json_encode($cardData),
      'aes-256-cbc',
      $publicKey,
      OPENSSL_RAW_DATA,
      $iv
    );
    
    return [
      'encryptedData' => bin2hex($encrypted),
      'reference' => $reference
    ];
  } catch (Exception $e) {
    throw new Exception("Encryption failed: " . $e->getMessage());
  }
}
 
// Usage example
$cardData = [
  'number' => '4242424242424242',
  'cvv' => '123',
  'expiryMonth' => '12',
  'expiryYear' => '23',  // 2 digits format
  'pin' => '1234'
];
 
$result = encryptCardDetails($cardData, 'YOUR_PUBLIC_KEY');
print_r($result);