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sdlj8051

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专业: 电路与系统

[交流] [转贴]VB P-code粗略分析

VB-Pcode反编译文件的粗略分析,高手莫笑话!

分析1:

Private Sub Command1_Click()
Dim x As Integer, y As Integer, z As Integer
x = 123
y = 321
z = x + y
MsgBox z

End Sub

[Command1.Click]

:00401874  F47B             LitI2_Byte          ;Push 7B //123入栈
:00401876  707AFF             FStI2             ;Pop WORD [LOCAL_0086] //弹出0086操作数
                                                                                    //整形占2个字节
{x=123}
:00401879  F34101             LitI2             ;Push 0141 //321入栈
:0040187C  7078FF             FStI2             ;Pop WORD [LOCAL_0088] //弹出0088操作数
                                                                                    //正好是0086+2,说明内存写时是连续的
{y=321}
:0040187F  6B7AFF             FLdI2             ;Push WORD [LOCAL_0086] //f?load?i2应该是integer
:00401882  6B78FF             FLdI2             ;Push WORD [LOCAL_0088] //继续第二个参数入栈
:00401885  A9                AddI2             ; //整数相加,保存在0088+2
{z = x + y}
:00401886  7076FF             FStI2             ;Pop WORD [LOCAL_008A] //SUM出栈待用
================ //MsgBox原形
MsgBox(prompt[, buttons] [, title] [, helpfile, context])
================

:00401889  2704FF             LitVar             ;PushVar LOCAL_00FC //未负值参数,context
:0040188C  2724FF             LitVar             ;PushVar LOCAL_00DC //未负值参数,helpfile
:0040188F  2744FF             LitVar             ;PushVar LOCAL_00BC //未负值参数,title
:00401892  F500000000       LitI4             ;Push 00000000 //buttons 缺省值为 0
:00401897  0476FF             FLdRfVar          ;Push LOCAL_008A //prompt,作为显示在对话框中的消息.
:0040189A  4D64FF0240       CVarRef             ;
**********Reference To->msvbvm60.rtcMsgBox
                           |
:0040189F  0A00001400       ImpAdCallFPR4       ;Call ptr_00401020; check stack 0014; Push EAX //调用MsgBox
{MsgBox z}
:004018A4  36060044FF24FF04 FFreeVar          ;Free 0006/2 variants //释放变量
:004018AD  13                ExitProcHresult    ; //退出程序

分析2:

Private Sub Command1_Click()
Dim x As Integer, y As Integer, z As Integer
x = 123
y = 321
z = x + y
MsgBox z, vbOKOnly, "pcode"

End Sub

[Command1.Click]
:00401888  F47B             LitI2_Byte          ;Push 7B //123入栈
:0040188A  707AFF             FStI2             ;Pop WORD [LOCAL_0086] //弹出0086操作数
{x=123}
:0040188D  F34101             LitI2             ;Push 0141 //321入栈
:00401890  7078FF             FStI2             ;Pop WORD [LOCAL_0088] //弹出0088操作数
{y=321}
:00401893  6B7AFF             FLdI2             ;Push WORD [LOCAL_0086] //ADD第一个参数入栈
:00401896  6B78FF             FLdI2             ;Push WORD [LOCAL_0088] //ADD第二个参数入栈
:00401899  A9                AddI2             ; //ADD
{z = x + y}
:0040189A  7076FF             FStI2             ;Pop WORD [LOCAL_008A] //SUM出栈待用
:0040189D  2704FF             LitVar             ;PushVar LOCAL_00FC //未负值参数,context
:004018A0  2724FF             LitVar             ;PushVar LOCAL_00DC //未负值参数,helpfile
******Possible String Ref To->"pcode"
                           |
:004018A3  3A54FF0000       LitVarStr          ;PushVarString ptr_004013C8 //"pcode"入栈
:004018A8  4E44FF             FStVarCopyObj       ;[LOCAL_00BC]=vbaVarDup(Pop) //地址负值
:004018AB  0444FF             FLdRfVar          ;Push LOCAL_00BC //title果然被负值,看来分析并没有错误
:004018AE  F500000000       LitI4             ;Push 00000000 //buttons 缺省值为 0
:004018B3  0476FF             FLdRfVar          ;Push LOCAL_008A //prompt,SUM
:004018B6  4D64FF0240       CVarRef             ;
**********Reference To->msvbvm60.rtcMsgBox
                           |
:004018BB  0A01001400       ImpAdCallFPR4       ;Call ptr_00401020; check stack 0014; Push EAX //调用MsgBox
{MsgBox z, vbOKOnly, "pcode"}
:004018C0  36060044FF24FF04 FFreeVar          ;Free 0006/2 variants //释放变量
:004018C9  13                ExitProcHresult    ; //退出程序
:004018CA  0000             LargeBos          ;IDE beginning of line with 00 byte codes

分析3:

Private Declare Function MessageBox Lib "user32" Alias "MessageBoxA" (ByVal hwnd As Long, ByVal lpText As String, ByVal lpCaption As String,

ByVal wType As Long) As Long
Const MB_OK = &H0&

Private Sub Command1_Click()
Dim x As Integer, y As Integer, z As Integer
x = 123
y = 321
z = x + y
MessageBox Me.hwnd, "sum=" & z, "pcode", MB_OK

End Sub

[Command1.Click]
:004018FC  F47B             LitI2_Byte          ;Push 7B //123入栈
:004018FE  707AFF             FStI2             ;Pop WORD [LOCAL_0086] //弹出0086操作数
{x = 123}
:00401901  F34101             LitI2             ;Push 0141 //321入栈
:00401904  7078FF             FStI2             ;Pop WORD [LOCAL_0088] //弹出0088操作数
{x = 123}
:00401907  6B7AFF             FLdI2             ;Push WORD [LOCAL_0086] //ADD第一个参数入栈
:0040190A  6B78FF             FLdI2             ;Push WORD [LOCAL_0088] //ADD第二个参数入栈
:0040190D  A9                AddI2             ; /ADD
{z = x + y}
:0040190E  7076FF             FStI2             ;Pop WORD [LOCAL_008A] //SUM出栈待用
:00401911  0470FF             FLdRfVar          ;Push LOCAL_0090 //将地址入栈,记录地址
:00401914  080800             FLdPr             ;[SR]=[STACK_0008]
:00401917  0D58000000       VCallHresult       ;Call ptr_004014CC //这里应该是调用Me.hwnd,保存在0090
==================//MsgBox原形
int MessageBox(

HWND hWnd,  // handle of owner window
LPCTSTR lpText,  // address of text in message box
LPCTSTR lpCaption,  // address of title of message box
UINT uType // style of message box
);
==================//下面是参数入栈
:0040191C  F500000000       LitI4             ;Push 00000000 //uType,参数一
******Possible String Ref To->"pcode"
                           |
:00401921  1B0100             LitStr             ;Push ptr_00401624 //装入"pcode"字符
:00401924  0460FF             FLdRfVar          ;Push LOCAL_00A0
:00401927  34                CStr2Ansi          ;vbaStrToAnsi //把Unicode形式转换为Ansi
:00401928  6C60FF             ILdRf             ;Push DWORD [LOCAL_00A0] //lpCaption,参数二
******Possible String Ref To->"sum="
                           |
:0040192B  1B0200             LitStr             ;Push ptr_00401614 //装入"sum="字符
:0040192E  6B76FF             FLdI2             ;Push WORD [LOCAL_008A] //参数SUM入栈
:00401931  FBFD             CStrUI1             ;vbaStrI2 //将整数转换为字符型,保存在0094
:00401933  236CFF             FStStrNoPop       ;SysFreeString [LOCAL_0094]; [LOCAL_0094]=[stack]
:00401936  2A                ConcatStr          ;vbaStrCat //连接字符,保存在0098
:00401937  2368FF             FStStrNoPop       ;SysFreeString [LOCAL_0098]; [LOCAL_0098]=[stack]
:0040193A  0464FF             FLdRfVar          ;Push LOCAL_009C //将地址入栈,记录地址
:0040193D  34                CStr2Ansi          ;vbaStrToAnsi //把Unicode形式转换为Ansi
:0040193E  6C64FF             ILdRf             ;Push DWORD [LOCAL_009C] //lpText,参数三
:00401941  6C70FF             ILdRf             ;Push DWORD [LOCAL_0090] //hWnd,参数四
***********Reference To:user32.MessageBoxA
                           |
:00401944  0A03001000       ImpAdCallFPR4       ;Call ptr_004015E8; check stack 0010; Push EAX //调用MessageBox
:00401949  3C                SetLastSystemError ;Kernel GetLastError //针对调用MessageBox函数,取得扩展错误信息
:0040194A  3208006CFF68FF64 FFreeStr          ;Do SysFreeString [arg_n]; [arg_n]=0 0008/2 times ~ arg
:00401955  13                ExitProcHresult    ;
:00401956  0000             LargeBos          ;IDE beginning of line with 00 byte codes

[ Last edited by sdlj8051 on 2006-10-6 at 11:36 ]

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****************************************
      Case "5"
      strCode = strCode & "eb"
****************************************
:0040297C  3170FF             FStStr             ;SysFreeString [LOCAL_0090]; [LOCAL_0090]=Pop // 将字符释放到0090
:0040297F  1E2202             Branch             ;ESI=00402A06 // 跳出CASE
:00402982  04C4FE             FLdRfVar          ;Push LOCAL_013C // 加载临时变量
******Possible String Ref To->"6"
                           |
:00402985  3A48FF1000       LitVarStr          ;PushVarString ptr_004022A4 // "6"入栈
:0040298A  5D                HardType          ;
:0040298B  FB33             EqVarBool          ;// 判断变量是否相等
:0040298D  1CB901             BranchF             ;If Pop=0 then ESI=0040299D // 条件为假跳0040299D
:00402990  6C70FF             ILdRf             ;Push DWORD [LOCAL_0090] // 加载strCode
******Possible String Ref To->"fb"
                           |
:00402993  1B1100             LitStr             ;Push ptr_004022AC  // "fb"入栈
:00402996  2A                ConcatStr          ;vbaStrCat // 连接字符串
****************************************
      Case "6"
      strCode = strCode & "fb"
****************************************
:00402997  3170FF             FStStr             ;SysFreeString [LOCAL_0090]; [LOCAL_0090]=Pop // 将字符释放到0090
:0040299A  1E2202             Branch             ;ESI=00402A06 // 跳出CASE
:0040299D  04C4FE             FLdRfVar          ;Push LOCAL_013C // 加载临时变量
******Possible String Ref To->"7"
                           |
:004029A0  3A48FF1200       LitVarStr          ;PushVarString ptr_004022B8 // "7"入栈
:004029A5  5D                HardType          ;
:004029A6  FB33             EqVarBool          ;// 判断变量是否相等
:004029A8  1CD401             BranchF             ;If Pop=0 then ESI=004029B8 // 条件为假跳004029B8
:004029AB  6C70FF             ILdRf             ;Push DWORD [LOCAL_0090] // 加载strCode
******Possible String Ref To->"ea"
                           |
:004029AE  1B1300             LitStr             ;Push ptr_004022C0 // "ea"入栈
:004029B1  2A                ConcatStr          ;vbaStrCat // 连接字符串
****************************************
      Case "7"
      strCode = strCode & "ea"
****************************************
:004029B2  3170FF             FStStr             ;SysFreeString [LOCAL_0090]; [LOCAL_0090]=Pop // 将字符释放到0090
:004029B5  1E2202             Branch             ;ESI=00402A06 // 跳出CASE
:004029B8  04C4FE             FLdRfVar          ;Push LOCAL_013C // 加载临时变量
******Possible String Ref To->"8"
                           |
:004029BB  3A48FF1400       LitVarStr          ;PushVarString ptr_004022CC // "8"入栈
:004029C0  5D                HardType          ;
:004029C1  FB33             EqVarBool          ;// 判断变量是否相等
:004029C3  1CEF01             BranchF             ;If Pop=0 then ESI=004029D3 // 条件为假跳004029D3
:004029C6  6C70FF             ILdRf             ;Push DWORD [LOCAL_0090] // 加载strCode
******Possible String Ref To->"ec"
                           |
:004029C9  1B1500             LitStr             ;Push ptr_004022D4 // "ec"入栈
:004029CC  2A                ConcatStr          ;vbaStrCat // 连接字符串
****************************************
      Case "8"
      strCode = strCode & "ec"
****************************************
:004029CD  3170FF             FStStr             ;SysFreeString [LOCAL_0090]; [LOCAL_0090]=Pop // 将字符释放到0090
:004029D0  1E2202             Branch             ;ESI=00402A06 // 跳出CASE
:004029D3  04C4FE             FLdRfVar          ;Push LOCAL_013C // 加载临时变量
******Possible String Ref To->"9"
                           |
:004029D6  3A48FF1600       LitVarStr          ;PushVarString ptr_004022E0 // "9"入栈
:004029DB  5D                HardType          ;
:004029DC  FB33             EqVarBool          ;// 判断变量是否相等
:004029DE  1C0A02             BranchF             ;If Pop=0 then ESI=004029EE // 条件为假跳004029EE
:004029E1  6C70FF             ILdRf             ;Push DWORD [LOCAL_0090] // 加载strCode
******Possible String Ref To->"db"
                           |
:004029E4  1B1700             LitStr             ;Push ptr_004022E8 // "db"入栈
:004029E7  2A                ConcatStr          ;vbaStrCat // 连接字符串
****************************************
      Case "9"
      strCode = strCode & "db"
****************************************
:004029E8  3170FF             FStStr             ;SysFreeString [LOCAL_0090]; [LOCAL_0090]=Pop // 将字符释放到0090
:004029EB  1E2202             Branch             ;ESI=00402A06 // 跳出CASE
:004029EE  04C4FE             FLdRfVar          ;Push LOCAL_013C // 加载临时变量
******Possible String Ref To->"0"
                           |
:004029F1  3A48FF1800       LitVarStr          ;PushVarString ptr_004022F4 // "0"入栈
:004029F6  5D                HardType          ;
:004029F7  FB33             EqVarBool          ;// 判断变量是否相等
:004029F9  1C2202             BranchF             ;If Pop=0 then ESI=00402A06 // 条件为假跳00402A06,正好为CASE结束
:004029FC  6C70FF             ILdRf             ;Push DWORD [LOCAL_0090] // 加载strCode
******Possible String Ref To->"ab"
                           |
:004029FF  1B1900             LitStr             ;Push ptr_004022FC // "ab"入栈
:00402A02  2A                ConcatStr          ;vbaStrCat // 连接字符串
****************************************
      Case "0"
      strCode = strCode & "da"
****************************************
:00402A03  3170FF             FStStr             ;SysFreeString [LOCAL_0090]; [LOCAL_0090]=Pop // 将字符释放到0090

****************************************
End Select
****************************************

:00402A06  2828FF0100       LitVarI2          ;PushVarInteger 0001 \ 取长度
:00402A0B  6B66FF             FLdI2             ;Push WORD [LOCAL_009A] | 变量i的值
:00402A0E  E7                CI4UI1             ;                      | // MID函数参数入栈
:00402A0F  0478FF             FLdRfVar          ;Push LOCAL_0088       / 文本内容
:00402A12  4D48FF0840       CVarRef             ;// 创建临时变量
:00402A17  0418FF             FLdRfVar          ;Push LOCAL_00E8 // 加载临时变量
**********Reference To->msvbvm60.rtcMidCharVar
                           |
:00402A1A  0A05001000       ImpAdCallFPR4       ;Call ptr_00401036; check stack 0010; Push EAX // MID()操作
:00402A1F  0418FF             FLdRfVar          ;Push LOCAL_00E8 \
:00402A22  FDFE5CFF          CStrVarVal          ;             / // ASC函数参数入栈
**********Reference To->msvbvm60.rtcAnsiValueBstr
                           |
:00402A26  0B04000400       ImpAdCallI2       ;Call ptr_00401030; check stack 0004; Push EAX // ASC()操作
:00402A2B  F441             LitI2_Byte          ;Push 41 // 65入栈
:00402A2D  DF                GeI2                ;// 大于等于比较操作
:00402A2E  28E8FE0100       LitVarI2          ;PushVarInteger 0001 \ 取长度
:00402A33  6B66FF             FLdI2             ;Push WORD [LOCAL_009A] | 变量i的值
:00402A36  E7                CI4UI1             ;                      | // MID函数参数入栈
:00402A37  0478FF             FLdRfVar          ;Push LOCAL_0088       / 文本内容
:00402A3A  4D08FF0840       CVarRef             ;// 创建临时变量
:00402A3F  04D8FE             FLdRfVar          ;Push LOCAL_0128 // 加载临时变量

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专业: 电路与系统

分析1：(源文件)
=============================================
Private Sub Command1_Click()
  Dim name As String, code As String
  Dim i As Integer
  name = Text1.Text
  For i = 1 To Len(name)
code = code & CStr(Asc(Mid(name, i, 1)))

  Next i
  Text2.Text = code

End Sub
=============================================
(P-Code)
=============================================
[Command1.Click]
:00401BD8  0468FF             FLdRfVar          ;Push LOCAL_0098 //开辟内存空间
:00401BDB  21                FLdPrThis          ;[SR]=[stack2]             //和下句配套使用
:00401BDC  0F0403             VCallAd             ;Return the control index 03 //获得窗体句柄
:00401BDF  196CFF             FStAdFunc          ;//取propget过程地址
:00401BE2  086CFF             FLdPr             ;[SR]=[LOCAL_0094] //加载过程
***********Reference To:[propget]TextBox.Text //propget,TextBox.Text的取过程
                           |
:00401BE5  0DA0000000       VCallHresult       ;Call ptr_004014A8 //获得文本框中的内容
:00401BEA  3E68FF             FLdZeroAd          ;Push DWORD [LOCAL_0098]; [LOCAL_0098]=0 //将内容入栈
:00401BED  3178FF             FStStr             ;SysFreeString [LOCAL_0088]; [LOCAL_0088]=Pop //将字符释放到0088
:00401BF0  1A6CFF             FFree1Ad          ;Push [LOCAL_0094]; Call [[[LOCAL_0094]]+8]; [[LOCAL_0094]]=0
:00401BF3  F401             LitI2_Byte          ;Push 01
:00401BF5  0472FF             FLdRfVar          ;Push LOCAL_008E //将文本框中的内容入栈
:00401BF8  6C78FF             ILdRf             ;Push DWORD [LOCAL_0088] //字符串入栈作为参数
:00401BFB  4A                FnLenStr          ;vbaLenBstr //计算字符串长度
:00401BFC  E4                CI2I4             ;Verify [stack] high word is 0000, ECX=[ECX]
***********循环计算开始
:00401BFD  FE6364FF7200       ForI2             ;//For运算
:00401C03  6C74FF             ILdRf             ;Push DWORD [LOCAL_008C] \
:00401C06  2834FF0100       LitVarI2          ;PushVarInteger 0001    |
:00401C0B  6B72FF             FLdI2             ;Push WORD [LOCAL_008E]  | MID函数参数入栈
:00401C0E  E7                CI4UI1             ;                      |
:00401C0F  0478FF             FLdRfVar          ;Push LOCAL_0088       |
:00401C12  4D54FF0840       CVarRef             ;                      |
:00401C17  0424FF             FLdRfVar          ;Push LOCAL_00DC       /
**********Reference To->msvbvm60.rtcMidCharVar //MID
                           |
:00401C1A  0A01001000       ImpAdCallFPR4       ;Call ptr_00401030; check stack 0010; Push EAX //MID取字符
:00401C1F  0424FF             FLdRfVar          ;Push LOCAL_00DC //取得字符入栈
:00401C22  FDFE68FF          CStrVarVal          ;
**********Reference To->msvbvm60.rtcAnsiValueBstr //ASC
                           |
:00401C26  0B02000400       ImpAdCallI2       ;Call ptr_00401036; check stack 0004; Push EAX //ASC运算
:00401C2B  FBFD             CStrUI1             ;vbaStrI2 //将整数转换为字符
:00401C2D  2320FF             FStStrNoPop       ;SysFreeString [LOCAL_00E0]; [LOCAL_00E0]=[stack] //将字符释放
:00401C30  2A                ConcatStr          ;vbaStrCat //连接字符串
:00401C31  3174FF             FStStr             ;SysFreeString [LOCAL_008C]; [LOCAL_008C]=Pop //将字符释放
:00401C34  32040068FF20FF    FFreeStr          ;Do SysFreeString [arg_n]; [arg_n]=0 0004/2 times ~ arg
:00401C3B  36040034FF24FF    FFreeVar          ;Free 0004/2 variants //释放变量
:00401C42  0472FF             FLdRfVar          ;Push LOCAL_008E //将文本框中的内容入栈
:00401C45  6464FF2B00       NextI2             ;
**********循环计算结束
:00401C4A  6C74FF             ILdRf             ;Push DWORD [LOCAL_008C]
:00401C4D  21                FLdPrThis          ;[SR]=[stack2]             //和下句配套使用
:00401C4E  0F0003             VCallAd             ;Return the control index 02 //获得窗体句柄
:00401C51  196CFF             FStAdFunc          ;//取propput过程地址
:00401C54  086CFF             FLdPr             ;[SR]=[LOCAL_0094] //加载过程
***********Reference To:[propput]TextBox.Text //propput,TextBox.Text的赋值过程
                           |
:00401C57  0DA4000000       VCallHresult       ;Call ptr_004014A8 //给TextBox.Text赋值
:00401C5C  1A6CFF             FFree1Ad          ;Push [LOCAL_0094]; Call [[[LOCAL_0094]]+8]; [[LOCAL_0094]]=0
:00401C5F  13                ExitProcHresult    ;//退出过程

在1的基础上我们在加个判断看看！

分析2：(源文件)
=============================================
Private Sub Command1_Click()
  Dim name As String, code As String, T As String, F As String
  Dim i As Integer
  T = "True code!"
  F = "False code!"
  name = Text1.Text
  For i = 1 To Len(name)
code = code & CStr(Asc(Mid(name, i, 1)))

  Next i

  If Text2.Text = code Then
   MsgBox T, vbOKOnly, "P-Code(2-2)"
  Else
MsgBox F, vbOKOnly, "P-Code(2-2)"
  End If


End Sub
=============================================
(P-Code)
=============================================
[Command1.Click]
******Possible String Ref To->"True code!"
                           |
:00401C48  1B0000             LitStr             ;Push ptr_004016F4 //装入"True code!"字符
:00401C4B  4370FF             FStStrCopy          ;[LOCAL_0090]=SysAllocStringByteLen(Pop, [Pop-4]); SysFreeString Pop //复制到内存0090
******Possible String Ref To->"False code!"
                           |
:00401C4E  1B0100             LitStr             ;Push ptr_00401710 //装入"False code!"字符
:00401C51  436CFF             FStStrCopy          ;[LOCAL_0094]=SysAllocStringByteLen(Pop, [Pop-4]); SysFreeString Pop //复制到内存0094
:00401C54  0460FF             FLdRfVar          ;Push LOCAL_00A0 //开辟内存空间
:00401C57  21                FLdPrThis          ;[SR]=[stack2]             //和下句配套使用
:00401C58  0F0403             VCallAd             ;Return the control index 03 //获得窗体句柄
:00401C5B  1964FF             FStAdFunc          ;//取propget过程地址
:00401C5E  0864FF             FLdPr             ;[SR]=[LOCAL_009C] //加载过程
***********Reference To:[propget]TextBox.Text //propget,TextBox.Text的取过程
                           |
:00401C61  0DA0000200       VCallHresult       ;Call ptr_00401728 //获得文本框中的内容
:00401C66  3E60FF             FLdZeroAd          ;Push DWORD [LOCAL_00A0]; [LOCAL_00A0]=0 //将内容入栈
:00401C69  3178FF             FStStr             ;SysFreeString [LOCAL_0088]; [LOCAL_0088]=Pop //将字符释放到0088
:00401C6C  1A64FF             FFree1Ad          ;Push [LOCAL_009C]; Call [[[LOCAL_009C]]+8]; [[LOCAL_009C]]=0
:00401C6F  F401             LitI2_Byte          ;Push 01
:00401C71  046AFF             FLdRfVar          ;Push LOCAL_0096 //将文本框中的内容入栈
:00401C74  6C78FF             ILdRf             ;Push DWORD [LOCAL_0088] //字符串入栈作为参数
:00401C77  4A                FnLenStr          ;vbaLenBstr //计算字符串长度
:00401C78  E4                CI2I4             ;Verify [stack] high word is 0000, ECX=[ECX]
***********循环计算开始
:00401C79  FE635CFF7E00       ForI2             ;//For运算
:00401C7F  6C74FF             ILdRf             ;Push DWORD [LOCAL_008C] \
:00401C82  282CFF0100       LitVarI2          ;PushVarInteger 0001    |
:00401C87  6B6AFF             FLdI2             ;Push WORD [LOCAL_0096]  |
:00401C8A  E7                CI4UI1             ;                      | MID函数参数入栈
:00401C8B  0478FF             FLdRfVar          ;Push LOCAL_0088       |
:00401C8E  4D4CFF0840       CVarRef             ;                      |
:00401C93  041CFF             FLdRfVar          ;Push LOCAL_00E4       /
**********Reference To->msvbvm60.rtcMidCharVar //MID
                           |
:00401C96  0A03001000       ImpAdCallFPR4       ;Call ptr_00401030; check stack 0010; Push EAX //MID取字符
:00401C9B  041CFF             FLdRfVar          ;Push LOCAL_00E4 //取得字符入栈
:00401C9E  FDFE60FF          CStrVarVal          ;
**********Reference To->msvbvm60.rtcAnsiValueBstr
                           |
:00401CA2  0B04000400       ImpAdCallI2       ;Call ptr_00401036; check stack 0004; Push EAX //ASC运算
:00401CA7  FBFD             CStrUI1             ;vbaStrI2 //将整数转换为字符
:00401CA9  2318FF             FStStrNoPop       ;SysFreeString [LOCAL_00E8]; [LOCAL_00E8]=[stack] //将字符释放
:00401CAC  2A                ConcatStr          ;vbaStrCat //连接字符串
:00401CAD  3174FF             FStStr             ;SysFreeString [LOCAL_008C]; [LOCAL_008C]=Pop //将字符释放
:00401CB0  32040060FF18FF    FFreeStr          ;Do SysFreeString [arg_n]; [arg_n]=0 0004/2 times ~ arg
:00401CB7  3604002CFF1CFF    FFreeVar          ;Free 0004/2 variants //释放变量
:00401CBE  046AFF             FLdRfVar          ;Push LOCAL_0096 //将文本框中的内容入栈
:00401CC1  645CFF3700       NextI2             ;
**********循环计算结束
:00401CC6  0460FF             FLdRfVar          ;Push LOCAL_00A0 //将文本框2中的内容入栈
:00401CC9  21                FLdPrThis          ;[SR]=[stack2]             //和下句配套使用
:00401CCA  0F0003             VCallAd             ;Return the control index 02 //获得窗体句柄
:00401CCD  1964FF             FStAdFunc          ;//取propput过程地址
:00401CD0  0864FF             FLdPr             ;[SR]=[LOCAL_009C] //加载过程
***********Reference To:[propget]TextBox.Text //propget,TextBox.Text的取过程
                           |
:00401CD3  0DA0000200       VCallHresult       ;Call ptr_00401728 //获得文本框中的内容
:00401CD8  6C60FF             ILdRf             ;Push DWORD [LOCAL_00A0] //将文本框2中的内容入栈
:00401CDB  6C74FF             ILdRf             ;Push DWORD [LOCAL_008C] //正确code
:00401CDE  FB30             EqStr             ;//字符串相等比较
:00401CE0  2F60FF             FFree1Str          ;SysFreeString [LOCAL_00A0]; [LOCAL_00A0]=0
:00401CE3  1A64FF             FFree1Ad          ;Push [LOCAL_009C]; Call [[[LOCAL_009C]]+8]; [[LOCAL_009C]]=0
:00401CE6  1CD000             BranchF             ;If Pop=0 then ESI=00401D18 //不相等则跳
:00401CE9  27E8FE             LitVar             ;PushVar LOCAL_0118       \
:00401CEC  271CFF             LitVar             ;PushVar LOCAL_00E4       |
******Possible String Ref To->"P-Code(2-2)"                                                 |
                           |                                                          |
:00401CEF  3A3CFF0500       LitVarStr          ;PushVarString ptr_0040173C  | MsgBox函数参数入栈
:00401CF4  4E2CFF             FStVarCopyObj       ;[LOCAL_00D4]=vbaVarDup(Pop) | 具体怎么看请找我的
:00401CF7  042CFF             FLdRfVar          ;Push LOCAL_00D4          | Pcode粗略分析(1)
:00401CFA  F500000000       LitI4             ;Push 00000000             |
:00401CFF  0470FF             FLdRfVar          ;Push LOCAL_0090          /
:00401D02  4D4CFF0840       CVarRef             ;
**********Reference To->msvbvm60.rtcMsgBox
                           |
:00401D07  0A06001400       ImpAdCallFPR4       ;Call ptr_0040103C; check stack 0014; Push EAX MsgBox
:00401D0C  3606002CFF1CFFE8 FFreeVar          ;Free 0006/2 variants //释放变量
:00401D15  1EFC00             Branch             ;ESI=00401D44 //跳转到00401D44
:00401D18  27E8FE             LitVar             ;PushVar LOCAL_0118       \
:00401D1B  271CFF             LitVar             ;PushVar LOCAL_00E4       |
******Possible String Ref To->"P-Code(2-2)"                                                 |
                           |                                                          |
:00401D1E  3A3CFF0500       LitVarStr          ;PushVarString ptr_0040173C  | MsgBox函数参数入栈
:00401D23  4E2CFF             FStVarCopyObj       ;[LOCAL_00D4]=vbaVarDup(Pop) |
:00401D26  042CFF             FLdRfVar          ;Push LOCAL_00D4          |
:00401D29  F500000000       LitI4             ;Push 00000000             |
:00401D2E  046CFF             FLdRfVar          ;Push LOCAL_0094          /
:00401D31  4D4CFF0840       CVarRef             ;
**********Reference To->msvbvm60.rtcMsgBox
                           |
:00401D36  0A06001400       ImpAdCallFPR4       ;Call ptr_0040103C; check stack 0014; Push EAX //MsgBox
:00401D3B  3606002CFF1CFFE8 FFreeVar          ;Free 0006/2 variants //释放内存变量
:00401D44  13                ExitProcHresult    ;//退出过程
:00401D45  0000             LargeBos          ;IDE beginning of line with 00 byte codes

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2楼2006-08-23 15:53:43

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sdlj8051

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注册: 2005-05-30
专业: 电路与系统

'在理解前两节知识的前提下，我们这里引入一个我自己写的LYSA算法和一个简单的CrackmeONEII作为分析的目标。
'作为除夕的礼物送给大家，小鸟一只让向各位献丑了！

'CrackmeONEII
'为了和前面衔接，CrackmeONEII是在Pcode(2-2)基础上写的
'下面是源代码，里面用的是一种查表法

***********Reference CrackmeONEII's Sound code

Private Sub Command1_Click()
  Dim name As String, code As String, strCode As String, T As String, F As String
  Dim i As Integer, j As Integer

  T = "CrackmeONEII+LYSA-II True code!"
  F = "CrackmeONEII+LYSA-II False code!"
  name = "": code = "": strCode = ""

  name = Text1.Text
  If name = "" Then
Text1.Text = ""
Exit Sub

  End If
  If Asc(name) < 0 Then
Text1.Text = ""
Exit Sub

  End If

  For i = 1 To Len(name)
If Asc(Mid(name, i, 1)) >= 48 And Asc(Mid(name, i, 1)) <= 57 Then '0-9
   Select Case Mid(name, i, 1)
      Case "1"
      strCode = strCode & "da"
      Case "2"
      strCode = strCode & "fa"
      Case "3"
      strCode = strCode & "fc"
      Case "4"
      strCode = strCode & "dc"
      Case "5"
      strCode = strCode & "eb"
      Case "6"
      strCode = strCode & "fb"
      Case "7"
      strCode = strCode & "ea"
      Case "8"
      strCode = strCode & "ec"
      Case "9"
      strCode = strCode & "db"
      Case "0"
      strCode = strCode & "ab"
   End Select

End If
If Asc(Mid(name, i, 1)) >= 65 And Asc(Mid(name, i, 1)) <= 90 Then 'A-Z
   Select Case Mid(name, i, 1)
      Case "A"
      strCode = strCode & "01"
      Case "B"
      strCode = strCode & "62"
      Case "C"
      strCode = strCode & "81"
      Case "D"
      strCode = strCode & "84"
      Case "E"
      strCode = strCode & "63"
      Case "F"
      strCode = strCode & "71"
      Case "G"
      strCode = strCode & "72"
      Case "H"
      strCode = strCode & "91"
      Case "I"
      strCode = strCode & "74"
      Case "J"
      strCode = strCode & "93"
      Case "K"
      strCode = strCode & "03"
      Case "L"
      strCode = strCode & "82"
      Case "M"
      strCode = strCode & "61"
      Case "N"
      strCode = strCode & "02"
      Case "O"
      strCode = strCode & "65"
      Case "P"
      strCode = strCode & "8a"
      Case "Q"
      strCode = strCode & "92"
      Case "R"
      strCode = strCode & "75"
      Case "S"
      strCode = strCode & "05"
      Case "T"
      strCode = strCode & "95"
      Case "U"
      strCode = strCode & "83"
      Case "V"
      strCode = strCode & "64"
      Case "W"
      strCode = strCode & "85"
      Case "X"
      strCode = strCode & "04"
      Case "Y"
      strCode = strCode & "94"
      Case "Z"
      strCode = strCode & "73"

   End Select

End If
If Asc(Mid(name, i, 1)) >= 97 And Asc(Mid(name, i, 1)) <= 122 Then 'a-z
   Select Case Mid(name, i, 1)
      Case "a"
      strCode = strCode & "10"
      Case "b"
      strCode = strCode & "26"
      Case "c"
      strCode = strCode & "18"
      Case "d"
      strCode = strCode & "48"
      Case "e"
      strCode = strCode & "36"
      Case "f"
      strCode = strCode & "17"
      Case "g"
      strCode = strCode & "27"
      Case "h"
      strCode = strCode & "19"
      Case "i"
      strCode = strCode & "47"
      Case "j"
      strCode = strCode & "39"
      Case "k"
      strCode = strCode & "30"
      Case "l"
      strCode = strCode & "28"
      Case "m"
      strCode = strCode & "16"
      Case "n"
      strCode = strCode & "20"
      Case "o"
      strCode = strCode & "56"
      Case "p"
      strCode = strCode & "3f"
      Case "q"
      strCode = strCode & "29"
      Case "r"
      strCode = strCode & "57"
      Case "s"
      strCode = strCode & "50"
      Case "t"
      strCode = strCode & "59"
      Case "u"
      strCode = strCode & "38"
      Case "v"
      strCode = strCode & "46"
      Case "w"
      strCode = strCode & "58"
      Case "x"
      strCode = strCode & "40"
      Case "y"
      strCode = strCode & "94"
      Case "z"
      strCode = strCode & "37"

   End Select

End If

If Asc(Mid(name, i, 1)) >= 0 And Asc(Mid(name, i, 1)) <= 47 Then
   Text1.Text = ""
   Exit Sub

End If

If Asc(Mid(name, i, 1)) >= 58 And Asc(Mid(name, i, 1)) <= 64 Then
   Text1.Text = ""
   Exit Sub

End If

If Asc(Mid(name, i, 1)) >= 91 And Asc(Mid(name, i, 1)) <= 96 Then
   Text1.Text = ""
   Exit Sub

End If

If Asc(Mid(name, i, 1)) >= 123 And Asc(Mid(name, i, 1)) <= 255 Then
   Text1.Text = ""
   Exit Sub

End If

  Next i
  'MsgBox strCode

  For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "f" Then code = code & "f"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "e" Then code = code & "e"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "d" Then code = code & "d"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "c" Then code = code & "c"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "b" Then code = code & "b"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "a" Then code = code & "a"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "9" Then code = code & "9"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "8" Then code = code & "8"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "7" Then code = code & "7"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "6" Then code = code & "6"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "5" Then code = code & "5"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "4" Then code = code & "4"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "3" Then code = code & "3"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "2" Then code = code & "2"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "1" Then code = code & "1"
  Next j
For j = 1 To Len(strCode)
If Mid(strCode, j, 1) = "0" Then code = code & "0"
  Next j
  'MsgBox code

  If Text2.Text = code Then
MsgBox T, vbOKOnly, "CrackmeONEII+LYSA-II"
  Else
Text1.Text = ""
Text2.Text = ""
MsgBox F, vbOKOnly, "CrackmeONEII+LYSA-II"
  End If


End Sub

***********Reference VB P-code

[Command1.Click]

******Possible String Ref To->"CrackmeONEII+LYSA-II True code!"
                           |
:004027E4  1B0000             LitStr             ;Push ptr_0040219C // 装入字符串
:004027E7  436CFF             FStStrCopy          ;[LOCAL_0094]=SysAllocStringByteLen(Pop, [Pop-4]); SysFreeString Pop // 复制到内存0094
******Possible String Ref To->"CrackmeONEII+LYSA-II False code!"
                           |
:004027EA  1B0100             LitStr             ;Push ptr_004021E0 // 装入字符串
:004027ED  4368FF             FStStrCopy          ;[LOCAL_0098]=SysAllocStringByteLen(Pop, [Pop-4]); SysFreeString Pop // 复制到内存0098
******Possible String Ref To->""
                           |
:004027F0  1B0200             LitStr             ;Push ptr_00402228 // 装入字符串
:004027F3  4378FF             FStStrCopy          ;[LOCAL_0088]=SysAllocStringByteLen(Pop, [Pop-4]); SysFreeString Pop // 复制到内存0088
******Possible String Ref To->""
                           |
:004027F6  1B0200             LitStr             ;Push ptr_00402228 // 装入字符串
:004027F9  4374FF             FStStrCopy          ;[LOCAL_008C]=SysAllocStringByteLen(Pop, [Pop-4]); SysFreeString Pop // 复制到内存008C
******Possible String Ref To->""
                           |
:004027FC  1B0200             LitStr             ;Push ptr_00402228 // 装入字符串
:004027FF  4370FF             FStStrCopy          ;[LOCAL_0090]=SysAllocStringByteLen(Pop, [Pop-4]); SysFreeString Pop // 复制到内存0090

****************************************
  T = "CrackmeONEII+LYSA-II True code!"
  F = "CrackmeONEII+LYSA-II False code!"
  name = "": code = "": strCode = ""
****************************************

:00402802  045CFF             FLdRfVar          ;Push LOCAL_00A4 // 开辟内存空间
:00402805  21                FLdPrThis          ;[SR]=[stack2]             \
:00402806  0F0403             VCallAd             ;Return the control index 03 / // 获得窗体句柄
:00402809  1960FF             FStAdFunc          ;// 取propget过程地址
:0040280C  0860FF             FLdPr             ;[SR]=[LOCAL_00A0] // 加载过程
***********Reference To:[propget]TextBox.Text // propget,TextBox.Text的取过程
                           |
:0040280F  0DA0000300       VCallHresult       ;Call ptr_0040222C // 获得文本框中的内容
:00402814  3E5CFF             FLdZeroAd          ;Push DWORD [LOCAL_00A4]; [LOCAL_00A4]=0 // 将内容入栈
:00402817  3178FF             FStStr             ;SysFreeString [LOCAL_0088]; [LOCAL_0088]=Pop // 将字符释放到0088
:0040281A  1A60FF             FFree1Ad          ;Push [LOCAL_00A0]; Call [[[LOCAL_00A0]]+8]; [[LOCAL_00A0]]=0 // 调用后释放空间

****************************************
name = Text1.Text
****************************************

:0040281D  6C78FF             ILdRf             ;Push DWORD [LOCAL_0088] // 装载获取的文本内容，作为参数
******Possible String Ref To->""
                           |
:00402820  1B0200             LitStr             ;Push ptr_00402228 // NULL字符入栈
:00402823  FB30             EqStr             ;//字符串比较
:00402825  1C5A00             BranchF             ;If Pop=0 then ESI=0040283E // 不相等则跳(F->条件为假)0040283E
******Possible String Ref To->""
                           |
:00402828  1B0200             LitStr             ;Push ptr_00402228 // NULL字符入栈
:0040282B  21                FLdPrThis          ;[SR]=[stack2]             \
:0040282C  0F0403             VCallAd             ;Return the control index 03 / // 获得窗体句柄
:0040282F  1960FF             FStAdFunc          ;// 取propput过程地址
:00402832  0860FF             FLdPr             ;[SR]=[LOCAL_00A0] // 加载过程
***********Reference To:[propput]TextBox.Text // propput,TextBox.Text的赋值过程
                           |
:00402835  0DA4000300       VCallHresult       ;Call ptr_0040222C // 将文本框赋值为NULL字符
:0040283A  1A60FF             FFree1Ad          ;Push [LOCAL_00A0]; Call [[[LOCAL_00A0]]+8]; [[LOCAL_00A0]]=0  // 调用后释放空间
:0040283D  13                ExitProcHresult    ;// 退出过程

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3楼2006-08-23 15:54:41

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sdlj8051

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应助: 0 (幼儿园)
贵宾: 0.1
金币: 1149.8
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注册: 2005-05-30
专业: 电路与系统

****************************************
  If name = "" Then
Text1.Text = ""
Exit Sub

  End If
****************************************

:0040283E  6C78FF             ILdRf             ;Push DWORD [LOCAL_0088] // 装载获取的文本内容，作为参数
**********Reference To->msvbvm60.rtcAnsiValueBstr //ASC()
                           |
:00402841  0B04000400       ImpAdCallI2       ;Call ptr_00401030; check stack 0004; Push EAX // ASC([LOCAL_0088])
:00402846  F400             LitI2_Byte          ;Push 00 // 0入栈
:00402848  D0                LtI2                ;// 整数的小于判断(less than)
:00402849  1C7E00             BranchF             ;If Pop=0 then ESI=00402862 // 不小于则跳00402862
******Possible String Ref To->""
                           |
:0040284C  1B0200             LitStr             ;Push ptr_00402228 // NULL字符入栈
:0040284F  21                FLdPrThis          ;[SR]=[stack2]             \
:00402850  0F0403             VCallAd             ;Return the control index 03 / // 获得窗体句柄
:00402853  1960FF             FStAdFunc          ;// 取propput过程地址
:00402856  0860FF             FLdPr             ;[SR]=[LOCAL_00A0] // 加载过程
***********Reference To:[propput]TextBox.Text // propput,TextBox.Text的赋值过程
                           |
:00402859  0DA4000300       VCallHresult       ;Call ptr_0040222C // 将文本框赋值为NULL字符
:0040285E  1A60FF             FFree1Ad          ;Push [LOCAL_00A0]; Call [[[LOCAL_00A0]]+8]; [[LOCAL_00A0]]=0 // 调用后释放空间
:00402861  13                ExitProcHresult    ;// 退出过程

****************************************
  If Asc(name) < 0 Then
Text1.Text = ""
Exit Sub

  End If
****************************************

:00402862  F401             LitI2_Byte          ;Push 01 // 01入栈
:00402864  0466FF             FLdRfVar          ;Push LOCAL_009A // 加载变量i
:00402867  6C78FF             ILdRf             ;Push DWORD [LOCAL_0088] // 装载获取的文本内容，作为参数
:0040286A  4A                FnLenStr          ;vbaLenBstr // 计算name长度
:0040286B  E4                CI2I4             ;Verify [stack] high word is 0000, ECX=[ECX]
:0040286C  FE6358FFA30A       ForI2             ;// FOR

****************************************
For i = 1 To Len(name)
****************************************

:00402872  2828FF0100       LitVarI2          ;PushVarInteger 0001 \ 取长度
:00402877  6B66FF             FLdI2             ;Push WORD [LOCAL_009A] | 变量i的值
:0040287A  E7                CI4UI1             ;                      | // MID函数参数入栈
:0040287B  0478FF             FLdRfVar          ;Push LOCAL_0088       / 文本内容
:0040287E  4D48FF0840       CVarRef             ;// 创建临时变量
:00402883  0418FF             FLdRfVar          ;Push LOCAL_00E8 // 加载临时变量
**********Reference To->msvbvm60.rtcMidCharVar
                           |
:00402886  0A05001000       ImpAdCallFPR4       ;Call ptr_00401036; check stack 0010; Push EAX // MID操作
:0040288B  0418FF             FLdRfVar          ;Push LOCAL_00E8 \
:0040288E  FDFE5CFF          CStrVarVal          ;             / // ASC函数参数入栈
**********Reference To->msvbvm60.rtcAnsiValueBstr
                           |
:00402892  0B04000400       ImpAdCallI2       ;Call ptr_00401030; check stack 0004; Push EAX // ASC操作
:00402897  F430             LitI2_Byte          ;Push 30 // 48入栈
:00402899  DF                GeI2                ;// 大于等于比较操作
:0040289A  28E8FE0100       LitVarI2          ;PushVarInteger 0001 \ 取长度
:0040289F  6B66FF             FLdI2             ;Push WORD [LOCAL_009A] | 变量i的值
:004028A2  E7                CI4UI1             ;                      | // MID函数参数入栈
:004028A3  0478FF             FLdRfVar          ;Push LOCAL_0088       / 文本内容
:004028A6  4D08FF0840       CVarRef             ;// 创建临时变量
:004028AB  04D8FE             FLdRfVar          ;Push LOCAL_0128 // 加载临时变量
**********Reference To->msvbvm60.rtcMidCharVar
                           |
:004028AE  0A05001000       ImpAdCallFPR4       ;Call ptr_00401036; check stack 0010; Push EAX //MID操作
:004028B3  04D8FE             FLdRfVar          ;Push LOCAL_0128 \
:004028B6  FDFED4FE          CStrVarVal          ;             / // ASC函数参数入栈
**********Reference To->msvbvm60.rtcAnsiValueBstr
                           |
:004028BA  0B04000400       ImpAdCallI2       ;Call ptr_00401030; check stack 0004; Push EAX //ASC操作
:004028BF  F439             LitI2_Byte          ;Push 39 // 57入栈
:004028C1  D5                LeI2                ;// 小于等于比较操作
:004028C2  C4                AndI4             ;// AND
:004028C3  3204005CFFD4FE    FFreeStr          ;Do SysFreeString [arg_n]; [arg_n]=0 0004/2 times ~ arg
:004028CA  36080028FF18FFE8 FFreeVar          ;Free 0008/2 variants // 释放临时变量
:004028D5  1C2202             BranchF             ;If Pop=0 then ESI=00402A06 // 条件为假则跳00402A06

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