HID开发笔记
Windows系统USB键盘KEYBOARD_INPUT_DATA12字节解析(BUSHOUND可抓包）
2022-06-07
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和鼠标的MOUSE_INPUT_DATA结构一样，键盘使用的是KEYBOARD_INPUT_DATA，并且这个不是HID键盘报告描述符定义的数据，而是系统转换后的数据。
该结构体定义如下：
typedef struct _KEYBOARD_INPUT_DATA {
USHORT UnitId;
USHORT MakeCode;
USHORT Flags;
USHORT Reserved;
ULONG ExtraInformation;
} KEYBOARD_INPUT_DATA, *PKEYBOARD_INPUT_DATA;
各字段定义详见：https://docs.microsoft.com/zh-cn/windows/win32/api/ntddkbd/ns-ntddkbd-keyboard_input_data
bushound定义KEYBOARD_INPUT_DATA如下：
| Offset | Length | Content |
|---|---|---|
| 0 | 2 | Not used |
| 2 | 2 | Scan code of key |
| 4 | 2 | Flags: |
| 0000h = key pressed | ||
| 0001h = key released | ||
| 0002h = extended scan code E0 | ||
| 0004h = extended scan code E1 | ||
| 6 | 2 | Not used |
| 8 | 4 | Device specific information |
我们通过BUSHOUND抓内容如下：
注意，这里抓的是12设备的数据，而不是10的数据，10设备的是HID报告描述符定义的HID键盘数据，而12设备才是转化后的数据。
Device Length Phase Data
------ -------- ----- --------------------------------------------
10.1 8 IN 00 00 04 00 00 00 00 00
12 12 IN 01 00 1e 00 00 00 00 00 00 00 00 00
10.1 8 IN 00 00 00 00 00 00 00 00
12 12 IN 01 00 1e 00 01 00 00 00 00 00 00 00
10.1 8 IN 00 00 05 00 00 00 00 00
12 12 IN 01 00 30 00 00 00 00 00 00 00 00 00
10.1 8 IN 00 00 00 00 00 00 00 00
12 12 IN 01 00 30 00 01 00 00 00 00 00 00 00
10.1 8 IN 00 00 06 00 00 00 00 00
12 12 IN 01 00 2e 00 00 00 00 00 00 00 00 00
10.1 8 IN 00 00 00 00 00 00 00 00
12 12 IN 01 00 2e 00 01 00 00 00 00 00 00 00
10.1 8 IN 00 00 07 00 00 00 00 00
12 12 IN 01 00 20 00 00 00 00 00 00 00 00 00
10.1 8 IN 00 00 00 00 00 00 00 00
12 12 IN 01 00 20 00 01 00 00 00 00 00 00 00
10.1 8 IN 00 00 08 00 00 00 00 00
12 12 IN 01 00 12 00 00 00 00 00 00 00 00 00
10.1 8 IN 00 00 00 00 00 00 00 00
12 12 IN 01 00 12 00 01 00 00 00 00 00 00 00
10.1 8 IN 00 00 09 00 00 00 00 00
12 12 IN 01 00 21 00 00 00 00 00 00 00 00 00
10.1 8 IN 00 00 00 00 00 00 00 00
12 12 IN 01 00 21 00 01 00 00 00 00 00 00 00
10.1 8 IN 00 00 0a 00 00 00 00 00
12 12 IN 01 00 22 00 00 00 00 00 00 00 00 00
10.1 8 IN 00 00 00 00 00 00 00 00
12 12 IN 01 00 22 00 01 00 00 00 00 00 00 00
10.1 8 IN 00 00 0b 00 00 00 00 00
12 12 IN 01 00 23 00 00 00 00 00 00 00 00 00
10.1 8 IN 00 00 00 00 00 00 00 00
12 12 IN 01 00 23 00 01 00 00 00 00 00 00 00
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