“PHP AES” Código de respuesta

PHP AES

function encrypt($plaintext, $password) {
    $method = "AES-256-CBC";
    $key = hash('sha256', $password, true);
    $iv = openssl_random_pseudo_bytes(16);

    $ciphertext = openssl_encrypt($plaintext, $method, $key, OPENSSL_RAW_DATA, $iv);
    $hash = hash_hmac('sha256', $ciphertext . $iv, $key, true);

    return base64_encode($iv . $hash . $ciphertext);
}

function decrypt($encryptedText, $password) {
    $encryptedText = base64_decode($encryptedText);

    $method = "AES-256-CBC";
    $iv = substr($encryptedText, 0, 16);
    $hash = substr($encryptedText, 16, 32);
    $ciphertext = substr($encryptedText, 48);
    $key = hash('sha256', $password, true);

    if (!hash_equals(hash_hmac('sha256', $ciphertext . $iv, $key, true), $hash)) return null;

    return openssl_decrypt($ciphertext, $method, $key, OPENSSL_RAW_DATA, $iv);
}