des_key_schedule
#define DES_SCHEDULE_SZ (sizeof(des_key_schedule))
void des_encrypt2(u_int32_t *data,des_key_schedule ks, int enc);
des_key_schedule ks1, des_key_schedule ks2, des_key_schedule ks3,
des_encrypt2(u_int32_t *data, des_key_schedule ks, int encrypt)
des_set_key(des_cblock (*key), des_key_schedule schedule)