写在前面：

现在要找工作。只好啰嗦下：

我熟悉WINDOWS API X86 32位指令 X87 FPU 编程.
还有比较牛的特点：一天能写12个小时代码的。手都不累。。（这点一般的新人是不行。。呵呵）
有意思谈下 加QQ 522165473

这个写了二天才写好。汗。。
(算法是别人的描述的，在http://en.wikipedia.org/wiki/MD5。我只是翻译下）

.386
.model flat,stdcall
option casemap:none
include ..\masm32\include\windows.inc
include ..\masm32\include\kernel32.inc
include ..\masm32\include\user32.inc
include ..\masm32\include\gdi32.inc
include ..\masm32\include\comdlg32.inc

includelib ..\masm32\lib\comdlg32.lib
includelib ..\masm32\lib\kernel32.lib
includelib ..\masm32\lib\gdi32.lib
includelib ..\masm32\lib\user32.lib
.data
ofn OPENFILENAME <>
hfile dd 0
fsize1 dd 0
fsize dd 0
filter db 'all','*.*',0,0
file db 4096 dup (0)
title1 db 'MD5',0
byte1 dd 0
time1 dd 0
hmem dd 0
byte2  dd 0
w dd 80h,15 dup (0)
time2 dd 0
show1 dd 10 dup (0)

x1 dd 067452301h
x2 dd 0EFCDAB89h
x3 dd 098BADCFEh
x4 dd 010325476h

a1 dd 0
b1 dd 0
c1 dd 0
d1 dd 0
i  dd 0
f dd 0
g dd 0
r dd 7,12,17,22,7,12,17,22,7,12,17,22,7,12,17,22
  dd 5,9,14,20,5,9,14,20,5,9,14,20,5,9,14,20
  dd 4,11,16,23,4,11,16,23, 4,11,16,23, 4,11,16,23
  dd 6,10,15,21,6,10,15,21,6,10,15,21,6,10,15,21
k dd 64 dup (0)

temp1 dd 1,2,3,4
temp2 dd 0.5
temp3 dd 180
x dd 0
temp4 dq 1.000
;;D76A A478
temp5 dq 0.0
;;;2^(11-1)-1=1023
ktemp dq 0.0
.const
cmembyte equ 65536
error1 db 'error in set file pointer!',0
.code
start:
；；；；；；；SIN(1)-SIN(60)注意思位限制时的处理

lea ebx,k
mov x,1
@@:
cmp x,65
jz @f
fild x
fsin
fabs
fstp ktemp
lea edx,ktemp
mov edi,[edx]
mov esi,[edx+4]
mov eax,esi
shl eax,1
shr eax,21
sub eax,1023
sub eax,20
add eax,32
mov ecx,eax
and esi,0fffffh
or  esi,100000h
shld esi,edi,cl
mov [ebx],esi
inc x
add ebx,4
jmp @b
@@:
invoke RtlZeroMemory,offset ofn,sizeof OPENFILENAME

mov ofn.lStructSize,sizeof OPENFILENAME
mov ofn.Flags,OFN_FILEMUSTEXIST or OFN_PATHMUSTEXIST
mov ofn.lpstrFilter,offset filter
mov ofn.lpstrFile,offset file
mov ofn.nMaxFile,4096
mov ofn.lpstrTitle,offset title1
invoke GetOpenFileName,offset ofn
cmp eax,0
jnz @f
invoke ExitProcess,0
@@:
invoke  CreateFile,offset file,GENERIC_WRITE or GENERIC_READ,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_SYSTEM,0
cmp eax, INVALID_HANDLE_VALUE
jnz @f
invoke ExitProcess,0
@@:
mov hfile,eax
invoke SetFilePointer,hfile,0,0,FILE_BEGIN
cmp eax,INVALID_SET_FILE_POINTER
jnz @f
invoke ExitProcess,0
@@:

invoke GlobalAlloc,GMEM_FIXED OR GMEM_ZEROINIT,cmembyte
cmp eax,0
jnz @f
invoke ExitProcess,0
@@:
mov hmem,eax
mov w,eax
invoke GetFileSize,hfile,NULL
mov fsize,eax
mov fsize1,eax
l12:
sub fsize,cmembyte
js l1
invoke ReadFile,hfile,hmem,cmembyte,offset byte1,0
cmp eax,0
jnz @f
invoke ExitProcess,0
@@:
mov time2,1024
call pmd5
jmp l12
l1:
add fsize,cmembyte
mov eax,fsize
mov time2,eax
shr time2,6
and fsize,3fh
sub eax,fsize
invoke ReadFile,hfile,hmem,eax,offset byte1,0

cmp eax,0
jnz @f
invoke ExitProcess,0
@@:
call pmd5

invoke ReadFile,hfile,hmem,fsize,offset byte1,0

cmp eax,0
jnz @f
invoke ExitProcess,0
@@:

mov edi,hmem
add edi,fsize
mov byte ptr [edi],80h
inc edi

mov eax,fsize
add eax,9

mov ebx,64
mov time2,1

cmp eax,65
js @f
add ebx,64
mov time2,2
@@:
sub ebx,eax

inc ebx
@@:
sub ebx,1
jz @f
mov byte ptr [edi],0
inc edi
jmp @b
@@:
mov eax,fsize1
cdq
mov ebx,8
mul ebx
mov [edi],eax
mov dword ptr [edi+4],edx

call pmd5

lshow:
lea edi,show1
lea esi,x1
mov ebx,0
lok1:
cmp ebx,16
jz lok3
mov al,[esi]
inc esi
mov ah,al
shr ah,4
add ah,30h
cmp ah,3ah
js @f
add ah,7
@@:
mov [edi],ah
inc edi
and al,0fh
add al,30h
cmp al,3ah
js @f
add al,7
@@:
mov [edi],al
inc edi
inc ebx
jmp lok1
lok3:
invoke MessageBox,0,offset show1,OFFSET title1,MB_OK
invoke ExitProcess,NULL
invoke ExitProcess,0
pmd5:
mov eax,hmem
mov w,eax
sub w,64
inc time2
start1:
sub time2,1
jnz @f
ret
@@:
add w,64
mov eax,x1
mov a1,eax
mov eax,x2
mov b1,eax
mov eax,x3
mov c1,eax
mov eax,x4
mov d1,eax

mov i,0
l1start:
cmp i,64
jz ll1
mov eax,i
shr eax,4

cmp eax,0
jnz @f
mov eax,d1
xor eax,c1
and eax,b1
xor eax,d1
mov f,eax

mov eax,i
mov g,eax
jmp ll2
@@:
cmp eax,1
jnz @f
mov eax,c1
xor eax,b1
and eax,d1
xor eax,c1
mov f,eax

mov eax,5
cdq
mul i
inc eax
and eax,0fh
mov g,eax
jmp ll2

@@:
cmp eax,2
jnz @f
mov eax,b1
xor eax,c1
xor eax,d1
mov f,eax

mov eax,3
cdq
mul i
add eax,5
and eax,0fh
mov g,eax
jmp ll2
@@:

cmp eax,3
jnz @f
mov eax,d1
not eax
or eax,b1
xor eax,c1
mov f,eax

mov eax,7
cdq
mul i
and eax,0fh
mov g,eax
@@:
ll2:
mov eax,d1
mov temp1,eax
mov eax,c1
mov d1,eax

mov eax,b1
mov c1,eax

mov edi,w
mov esi,g
mov eax,[edi+esi*4]
lea edi,k
mov esi,i
mov ebx,[edi+esi*4]
add eax,ebx
add eax,f
add eax,a1
lea edi,r
mov esi,i
mov ecx,[edi+esi*4]
rol eax,cl
add b1,eax

mov eax,temp1
mov a1,eax
inc i
jmp l1start
ll1:
mov eax,x1
add eax,a1
mov x1,eax

mov eax,x2
add eax,b1
mov x2,eax

mov eax,x3
add eax,c1
mov x3,eax

mov eax,x4
add eax,d1
mov x4,eax
jmp start1
ret
end start

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