AES_DECRYPT_IMPL
#define AES_DECRYPT_IMPL(a, b, c, d, e) rijndael_decrypt(a, b, c, d, e)
#define AES_DECRYPT_IMPL(a, b, c, d, e) rijndael_decrypt(a, b, c, d)
#define AES_DECRYPT_IMPL(a, b, c, d, e) aes_decrypt_impl(a, b, c, d)