uart_putstr("\r\n\t key = \t"); uart_hexdump(key, 8);
uart_putstr("\r\n\t cipher = \t"); uart_hexdump(data, 8);
des_decrypt(data,data,key);
uart_putstr("\r\n\t key = \t"); uart_hexdump(key, 8);
uart_putstr("\r\n\t cipher = \t"); uart_hexdump(data, 8);
des_decrypt(data,data,key);