访问键盘芯片获取PS/2键盘按键信息  

Acquisition of Keys Information by Access to PS/2 Keyboard Chip

作　　者：高志新[1] 应力[1] 

机构地区：[1]上海市信息安全测评认证中心,上海200011

出　　处：《信息安全与通信保密》2011年第6期61-63,共3页Information Security and Communications Privacy

摘　　要：通过直接访问键盘控制芯片实现对键盘输入数据的最底层读取,是实现键盘按键信息获取的有效方法。该方法是在键盘有数据之前先关闭键盘中断,在程序轮询处理好按键后打开中断,再通过键盘环回指令,将按键信息写回键盘输出缓冲区,让后续键盘中断程序继续处理按键信息。由于该方法在中断处理前轮询输出缓冲区,因此能够在所有程序前面准确获取到按键信息。To read the keyboard input data in the lowest level by direct access to the keyboard controller chip is an effective method for information acquisition. The keyboard should be closed and interrupted before the keyboard buffer has data,while the interruption is opened after the program obtains the key,then the key information is written into the output buffer through the keyboard loopback command,so that follow-up procedures can handle the keyboard interrupt key information. Since this method could poll the output buffer before the keyboard interruption,so it is capable of acquiring the keys before other procedures.

关 键 词：键盘记录 8042芯片 环回指令 

分 类 号：TP334.23[自动化与计算机技术—计算机系统结构]