后台编辑器加密、解密，前台解密

function my_aes_encode($str, $key, $method)
{
    if ($str === '') return ''; // 空内容直接返回，不加密
    $iv = random_bytes(openssl_cipher_iv_length($method));
    $enc = openssl_encrypt($str, $method, $key, OPENSSL_RAW_DATA, $iv);
    // iv + 密文，base64存储
    return base64_encode($iv . $enc);
}
// AES解密函数
function my_aes_decode($cipher, $key, $method)
{
    if (empty($cipher)) return '';
    $data = base64_decode($cipher);
    if ($data === false) return $cipher; // base64解析失败，原样返回兼容旧明文
    $ivLen = openssl_cipher_iv_length($method);
    if (strlen($data) <= $ivLen) return $cipher;
    $iv = substr($data, 0, $ivLen);
    $c = substr($data, $ivLen);
    $plain = openssl_decrypt($c, $method, $key, OPENSSL_RAW_DATA, $iv);
    return $plain === false ? $cipher : $plain;
}

// 保存前加密
\Phpcmf\Hooks::app_on('news', 'module_content_before', function ($data) use ($aesKey, $aesMethod) {
    $field = 'content';

    // 只处理非空内容
    if (isset($data[0][$field])) {
        $data[0][$field] = my_aes_encode($data[0][$field], $aesKey, $aesMethod);
    }
    return dr_return_data(1, '', $data);
});

config/hook.php 加密实现了，数据库也是加密的密文，在后台编辑时怎么解密。还有在前台怎么解密