Convert 4 lines from PHP to C++

Create a simple function in C++ with needed files that allows doing the following function encrypt_json($data,$key) { $encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_ECB); return $encrypted; } function decrypt_json($data,$key) { $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_ECB); return $decrypted; }