通过穷举法快速破解excel或word加密文档最高15位密码

1.打开文件

2.工具 --- 宏 ---- 录制新宏 --- 输入名字如 :aa

3.停止录制 ( 这样得到一个空宏 )

4.工具 --- 宏 ---- 宏 , 选 aa, 点编辑按钮

5.删除窗口中的所有字符 ( 只有几个 ), 替换为下面的内容 :( 复制吧 )

6.关闭编辑窗口

7.工具 --- 宏 ----- 宏 , 选 AllInternalPasswords,

8.运行 , 确定两次 , 等 2 分钟 , 然后再确定 ，瞬间没有密码了

内容如下：

Public Sub AllInternalPasswords()

' Breaks worksheet and workbook structure passwords. Bob McCormick

' probably originator of base code algorithm modified for coverage

' of workbook structure / windows passwords and for multiple passwords

'

' Norman Harker and JE McGimpsey 27-Dec-2002 (Version 1.1)

' Modified 2003-Apr-04 by JEM: All msgs to constants, and

' eliminate one Exit Sub (Version  1.1.1 )

' Reveals hashed passwords NOT original passwords

Const DBLSPACE As String = vbNewLine & vbNewLine

Const AUTHORS As String = DBLSPACE & vbNewLine & _

"Adapted from Bob McCormick base code by" & _

"Norman Harker and JE McGimpsey"

Const HEADER As String = "AllInternalPasswords User Message"

Const VERSION As String = DBLSPACE & "Version 1.1.1 2003-Apr-04"

Const REPBACK As String = DBLSPACE & "Please report failure " & _

"to the microsoft.public.excel.programming newsgroup."

Const ALLCLEAR As String = DBLSPACE & "The workbook should " & _

"now be free of all password protection, so make sure you:" & _

DBLSPACE & "SAVE IT NOW!" & DBLSPACE & "and also" & _

DBLSPACE & "BACKUP!, BACKUP!!, BACKUP!!!" & _

DBLSPACE & "Also, remember that the password was " & _

"put there for a reason. Don't stuff up crucial formulas " & _

"or data." & DBLSPACE & "Access and use of some data " & _

"may be an offense. If in doubt, don't."

Const MSGNOPWORDS1 As String = "There were no passwords on " & _

"sheets, or workbook structure or windows." & AUTHORS & VERSION

Const MSGNOPWORDS2 As String = "There was no protection to " & _

"workbook structure or windows." & DBLSPACE & _

"Proceeding to unprotect sheets." & AUTHORS & VERSION

Const MSGTAKETIME As String = "After pressing OK button this " & _

"will take some time." & DBLSPACE & "Amount of time " & _

"depends on how many different passwords, the " & _

"passwords, and your computer's specification." & DBLSPACE & _

"Just be patient! Make me a coffee!" & AUTHORS & VERSION

Const MSGPWORDFOUND1 As String = "You had a Worksheet " & _

"Structure or Windows Password set." & DBLSPACE & _

"The password found was: " & DBLSPACE & "$$" & DBLSPACE & _

"Note it down for potential future use in other workbooks by " & _

"the same person who set this password." & DBLSPACE & _

"Now to check and clear other passwords." & AUTHORS & VERSION

Const MSGPWORDFOUND2 As String = "You had a Worksheet " & _

"password set." & DBLSPACE & "The password found was: " & _

DBLSPACE & "$$" & DBLSPACE & "Note it down for potential " & _

"future use in other workbooks by same person who " & _

"set this password." & DBLSPACE & "Now to check and clear " & _

"other passwords." & AUTHORS & VERSION

Const MSGONLYONE As String = "Only structure / windows " & _

"protected with the password that was just found." & _

ALLCLEAR & AUTHORS & VERSION & REPBACK

Dim w1 As Worksheet, w2 As Worksheet

Dim i As Integer, j As Integer, k As Integer, l As Integer

Dim m As Integer, n As Integer, i1 As Integer, i2 As Integer

Dim i3 As Integer, i4 As Integer, i5 As Integer, i6 As Integer

Dim PWord1 As String

Dim ShTag As Boolean, WinTag As Boolean

Application.ScreenUpdating = False

With ActiveWorkbook

WinTag = .ProtectStructure Or .ProtectWindows

End With

ShTag = False

For Each w 1 In  Worksheets

ShTag = ShTag Or w1.ProtectContents

Next w1

If Not ShTag And Not WinTag Then

MsgBox MSGNOPWORDS1, vbInformation, HEADER

Exit Sub

End If

MsgBox MSGTAKETIME, vbInformation, HEADER

If Not WinTag Then

MsgBox MSGNOPWORDS2, vbInformation, HEADER

Else

On Error Resume Next

Do 'dummy do loop

For i = 65 To 66: For j = 65 To 66: For k = 65 To 66

For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66

For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66

For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126

With ActiveWorkbook

.Unprotect Chr(i) & Chr(j) & Chr(k) & _

Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _

Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)

If .ProtectStructure = False And _

.ProtectWindows = False Then

PWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _

Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _

Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)

MsgBox Application.Substitute(MSGPWORDFOUND1, _

"$$", PWord1), vbInformation, HEADER

Exit Do 'Bypass all for...nexts

End If

End With

Next: Next: Next: Next: Next: Next

Next: Next: Next: Next: Next: Next

Loop Until True

On Error GoTo 0

End If

If WinTag And Not ShTag Then

MsgBox MSGONLYONE, vbInformation, HEADER

Exit Sub

End If

On Error Resume Next

For Each w 1 In  Worksheets

'Attempt clearance with PWord1

w1.Unprotect PWord1

Next w1

On Error GoTo 0

ShTag = False

For Each w 1 In  Worksheets

'Checks for all clear ShTag triggered to 1 if not.

ShTag = ShTag Or w1.ProtectContents

Next w1

If ShTag Then

For Each w 1 In  Worksheets

With w1

If .ProtectContents Then

On Error Resume Next

Do 'Dummy do loop

For i = 65 To 66: For j = 65 To 66: For k = 65 To 66

For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66

For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66

For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126

.Unprotect Chr(i) & Chr(j) & Chr(k) & _

Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _

Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)

If Not .ProtectContents Then

PWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _

Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _

Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)

MsgBox Application.Substitute(MSGPWORDFOUND2, _

"$$", PWord1), vbInformation, HEADER

'leverage finding Pword by trying on other sheets

For Each w 2 In  Worksheets

w2.Unprotect PWord1

Next w2

Exit Do 'Bypass all for...nexts

End If

Next: Next: Next: Next: Next: Next

Next: Next: Next: Next: Next: Next

Loop Until True

On Error GoTo 0

End If

End With

Next w1

End If

MsgBox ALLCLEAR & AUTHORS & VERSION & REPBACK, vbInformation, HEADER

End Sub

穷举法破解 EXCEL 、 WORD 文档密码

摘要：本文讨论了如何使用
VB 编程，通过穷举法解除
EXCEL 文档和 WORD 文档的密码。并在破解过程中加入了中断，以方便用户随时中断破解过程。

关键字：穷举法、解密、 EXCEL 文档、 WORD 文档、密码

Excel 和 Word 提供了多种 方法 限制访问用户文档，以免未经授权者的查看和更改。但在信息化的今天，用户需要记忆的密码太多，一旦密码丢失，用户将无法打开或访问该文档，给用户造成很大的损失。能否借助 计算
机的高速运行，解开密码呢？通过尝试，笔者认为：在无法弄清 Excel 和 Word 加密算法的情况下，利用穷举法尝试解密文档，是解密唯一的选择。

1.  实现原理

本程序选用 VB6.0 编写，并充分利用了 Office 组件中的对象库，穷举尝试各种口令，达到解密文档的目的。

⑴   巧用整数的取整及取余，产生密码字符串

Excel 和 Word 文档密码可以是字母、数字、空格以及符号的任意组合，最长可达 
15  个字符，且区分大小写。

本程序的破解过程利用一个两层循环，产生选定字符的排列组合（尝试密码），其中外层循环控制密码的位数，内层循环生成 N 位密码的所有排列组合。产生尝试密码的 方法 是：将一个 N 位字符串密码（ password ）作为一个 “ 数值 ” ，该 “ 数值 ” 每个位上的 “ 数字 ” 属于选定字符范围，且该 “ 数值 ” 与一个整数（ X ）一一对应，并满足以下条件：  0 ≤X ≤ArrayLenN-1 （ ArrayLen 是选定密码字符范围的总字符数，如：仅选定数字时， ArrayLen=10 ；仅选定数字和小写字母时， ArrayLen=10+26=36 ）；对 X 整除、取余 N-1 次，对每次的余数 Y 做以下操作： password = password +
CharArray(Y)  （注： CharArray 是存放选定字符的一维数组），最后做以下操作： password = CharArray(X MOD
ArrayLen) + password ，产生的
password  就是整数 X 对应的 N 位字符串。

⑵   利用 VB 的错误处理功能，尝试口令破解

当运行程序尝试一个密码时（用该密码打开文档），若密码错误，则会产生运行错误。为此，必须在尝试口令前，使用 On Error  语句打开一个错误处理程序；由于本程序是尝试各种口令，当一个口令错误时，直接尝试下一个口令即可，因此，应使用 
“On Error Resume Next” 语句。

那么，如何得知找到口令了呢？ 
VB 有一个内部错误对象 Err ，它的 
Number  属性中的值是用来确定发生错误的原因。在尝试一个口令后，检查 Err.Number 中的值，以确定该口令是否正确。

⑶   破解过程中的中断

利用穷举法解密对系统资源的占用是十分惊人的，在解密的过程中 CPU 的利用率几乎是 100% ，若不加入解密过程中的中断， 计算
机系统会处于一种假死机状态。为此，在破解过程的内循环中加入了 DoEvents 函数。 DoEvents 函数提供了一种取消任务的简便方法，它将控制切换到操作环境内核。只要此环境中的所有 应用
程序都有机会响应待处理事件， 应用
程序就又恢复控制。使用该函数的优点是：不会使应用程序放弃焦点，且后台事件能够得到有效处理。

2.  具体实现过程 

编程实现时，需要机器安装有 VB 应用程序及 Microsoft Office 组件。

⑴   新建 VB 工程，并对其初始化

新建一个 VB 工程，取名 Get_Password ，将启动窗体命名为 FrmMain 。首先选择 “ 工程 ” 菜单中的 “ 引用 ” ，在 “ 引用 ” 对话框中选择 “Microsoft Excel10.0 Object Library” 和 “Microsoft Word10.0
Object Library” （注意：如果安装的是 Office2000 或 Office97 ，应该选择 Excel 对象库和 Word 对象库的 9.0 版或 8.0 版）。其次在 “ 工程 ” 菜单中 “ 部件 ” 对话框中，选择添加 “Microsoft Windows common controls -2.5(sp2)” 和 “Microsoft Common
Dialog control  6.0” ，以便在窗体设计中使用微调控件和对话框控件。 

⑵   在 FrmMain 窗体上添加控件

在 FrmMain 窗体上，按照下图的位置添加表 1 中的控件，然后根据表 1 修改每个对象的属性。

 

表 1 ：

序号       
控件名称       
控件属性及其属性值

1      Frame     
Name=Frame1 ， Caption= 选择加密 文件 （ *.DOC 、 *.XLS ）

2      Frame     
Name=Frame2 ， Caption= 选定密码字符范围：

3      Frame     
Name=Frame3 ， Caption= 选择密码的长度：

4      ComboBow     
Name=Combo1

5      CommandButton     
Name=CmdBrowse ， Caption= 浏览

6      CommandButton     
Name=CmdStartCrack ， Caption= 开始破解

7      CommandButton     
Name=CmdQuit ， Caption= 退出系统

8      CheckBox     
Name=ChkDigital ， Caption= 数字 (10)

9      CheckBox     
Name=ChkLowercase ， Caption= 小写字母 (26)

10      CheckBox     
Name=ChkUppercase ， Caption= 大写字母 (26)

11      CheckBox     
Name=ChkSpace ， Caption= 空格 (1)

12      CheckBox     
Name=ChkBracket ， Caption= 括号 (6)

13      CheckBox     
Name=ChkOthers ， Caption= 其他 OEM 字符 (26)

14      TextBox     
Name=txtPasswordStartLong ，  Text=2

15      TextBox     
Name=txtPasswordEndLong ， Text=2

16      TextBox     
Name=Text1

17      UpDown     
Name=UpDown1 ， BuddyProperty=Text ， Wrap=TRUE ， Increment=1

          
BuddyControl=txtPasswordStartLong ， Max=15 ， Min=

18      UpDown     
Name=UpDown2 ， BuddyProperty=Text ， Wrap=TRUE ， Increment=1

          
BuddyControl=txtPasswordEndLong ， Max=15 ， Min=1

19      CommonDialog     
Name=Dialog ， DialogTitle= 请选择加密的 Excel 或 Word 文档

          
Filter=Excel(*.xls) ， Word(*.doc)|*.xls;*.doc

20      Label     
Name=Label1 ，  Caption= 破解进度：

21      Label     
Name=Label3 ， Caption= 从：

22      Label     
Name=Label5 ， Caption= 到：

⑶   为以上对象编写下列代码

为了便于 理解 ，程序中增加了适当的注释。

Option Explicit

Private Sub CmdBrowse_Click()

    Dialog.ShowOpen 'show the dialog

    Combo1.Text = Dialog.FileName   'set the
Filename text box to the selected file

    Combo1.Refresh

End Sub

Private Sub CmdQuit_Click()

    End

End Sub

Private Sub CmdStartCrack_Click()

    Static blnProcessing As Boolean

    Dim wd As New Word.Application, xls As New
Excel.Application

    Dim OpenReturn

    Dim strpath, pass, StrTemp, all_char(100) As String

    Dim J, K, Password_Start_Long, Password_End_Long, ArrayLen
As Integer

    Dim I, Temp As Long

    ArrayLen = 0    ' 数组初始化

    If ChkDigital.Value = 1 
The n

        For J = ArrayLen To ArrayLen + 9

           
all_char(J) = Chr(Asc("0") + J - ArrayLen)

        Next J

        ArrayLen = ArrayLen + 10

    End If

    If ChkLowercase.Value = 1 
The n

        For J = ArrayLen To ArrayLen + 25

           
all_char(J) = Chr(Asc("a") + J - ArrayLen)

        Next J

        ArrayLen = ArrayLen + 26

    End If

    If ChkUppercase.Value = 1 Then

        For J = ArrayLen To ArrayLen + 25

           
all_char(J) = Chr(Asc("A") + J - ArrayLen)

        Next J

        ArrayLen = ArrayLen + 26

    End If

    If ChkSpace.Value = 1 Then

        all_char(ArrayLen) = " "

        ArrayLen = ArrayLen + 1

    End If

    If ChkBracket.Value = 1 Then

        all_char(ArrayLen) = "("

        all_char(ArrayLen+1) =
")"

        all_char(ArrayLen+2) =
"{"

        all_char(ArrayLen+3) =
"}"

        all_char(ArrayLen+4) =
"["

        all_char(ArrayLen+5) =
"]"

        ArrayLen = ArrayLen + 6

    End If

    If ChkOthers.Value = 1 Then

        For J = ArrayLen To ArrayLen +
6    '33 to 39

           
all_char(J) = Chr(33 + J - ArrayLen)

        Next

      ArrayLen = ArrayLen + 7

        For J = ArrayLen To ArrayLen +
5    '42 to 47

           
all_char(J) = Chr(42 + J - ArrayLen)

        Next J

        ArrayLen = ArrayLen + 6

        For J = ArrayLen To ArrayLen +
6    '58 to 64

           
all_char(J) = Chr(58 + J - ArrayLen)

        Next J

        ArrayLen = ArrayLen + 7

        all_char(ArrayLen) = Chr(92)

        ArrayLen = ArrayLen + 1

        For J = ArrayLen To ArrayLen +
2    '94 to 96

           
all_char(J) = Chr(94 + J - ArrayLen)

        Next J

        ArrayLen = ArrayLen + 3

        all_char(ArrayLen) = Chr(124)

        all_char(ArrayLen+1) = Chr(126)

        ArrayLen = ArrayLen + 2

    End If

    If ArrayLen = 0 Then

        MsgBox " 错误：没有选择 ' 密码使用的字符 '", ,
" 请选择密码使用的字符范围 ..."

        Exit Sub

    End If

    If blnProcessing Then

        If MsgBox(" 真的要中断解密过程吗？ ",
vbYesNo, " 用户中断任务 ") = vbYes Then blnProcessing = False

    Else

        CmdStartCrack.Caption = " 中断破解 "

        blnProcessing = True

        strpath = Combo1.Text

        If strpath = "" Then

            MsgBox
" 错误：没有选择 ' 需要解密的 文件 '", , " 请选择需要解密的文件 ..."

            Exit Sub

        End If

        strpath = Trim(strpath)

        Password_Start_Long =
Val(txtPasswordStartLong.Text)

        Password_End_Long =
Val(txtPasswordEndLong.Text)

        If Password_Start_Long >
Password_End_Long Then

           
Password_Start_Long = Val(txtPasswordEndLong.Text)

           
Password_End_Long = Val(txtPasswordStartLong.Text)

        End If

        Label1.Caption = " 破解进度： "

        Label1.Refresh

        On Error Resume Next

        If UCase(Right(strpath, 3)) =
"XLS" Then

            For K =
Password_Start_Long To Password_End_Long    ' 破解 excel 开始

               
For I = 0 To ArrayLen ^ K - 1

                   
pass = ""

                   
Temp = I

                   
For J = 1 To K - 1

                       
Temp = Temp \ ArrayLe

                       
pass = all_char(Temp Mod ArrayLen) + pass

                   
Next J

                   
pass = pass + all_char(I Mod ArrayLen)

                   
Set OpenReturn = xls.Workbooks.Open(FileName:=strpath, Password:=pass)

                   
Text1.Text = pass    ' 显示破解进度

                   
Text1.Refresh

                   
If Err.Number <> 0 Then  ' 如果解密成功 , 打开文档 , 显示密码 , 退出过程

                       
Err.Clear

                   
Else

                       
Label1.Caption = " 文档密码： "

                       
Text1.Text = pass

                       
Me.Refresh

                       
xls.Visible = True

                       
CmdStartCrack.MousePointer = 0

                       
CmdStartCrack.Caption = " 开始破解 "

                       
blnProcessing = False

                       
Set xls = Nothing

                       
Exit Sub

                   
End If

                   
DoEvents

                   
If Not blnProcessing Then Exit For

               
Next I

               
If Not blnProcessing Then Exit For

            Next K

            xls.Quit

            Set xls =
Nothing

        Else

            For K =
Password_Start_Long To Password_End_Long  ' 破解 word 开始

               
For I = 0 To ArrayLen ^ K - 1

                   
pass = ""

                   
Temp = I

                   
For J = 1 To K -

                     
Temp = Temp \ ArrayLen

                       
pass = all_char(Temp Mod ArrayLen) + pass

                   
Next J

                   
pass = pass + all_char(I Mod ArrayLen)

                   
OpenReturn = wd.Documents.Open(FileName:=strpath, passworddocument:=pass)

                   
Text1.Text = pass  ' 显示破解进度

                   
Text1.Refresh

                   
If Err.Number <> 0 Then    ' 如果解密成功 , 打开文档 , 显示密码 , 退出过程

                       
Err.Clear

                   
Else

                       
'MsgBox "word password"

                       
Label1.Caption = " 文档密码： "

                       
Text1.Text = pass

                       
Me.Refresh

                       
wd.Visible = True

                       
CmdStartCrack.MousePointer = 0

                       
CmdStartCrack.Caption = " 开始破解 "

                       
blnProcessing = False

                       
Set wd = Nothing

                       
Exit Sub

                   
End If

                   
DoEvents

                   
If Not blnProcessing Then Exit For

               
Next I

               
If Not blnProcessing Then Exit For

            Next K

            wd.Quit

            Set wd = Nothing

        End If

        CmdStartCrack.Caption = " 开始破解 "

        If blnProcessing Then MsgBox
" 没有找到密码，可能是密码位数不对 !", , " 提示信息 ..."

        blnProcessing = False

End Sub

3.  时间复杂度 分析

一个算法的时间复杂度，是指该算法的时间耗费，是该算法所求解 问题
规模 n 的函数。根据前面讲的实现原理，我们知道，破解算法的时间耗费主要集中在尝试打开 OFFICE 文档上，因此，当我们假设破解一个 N 位字符串密码，且选定密码字符范围的总字符数为 ArrayLen 时，该算法的时间复杂度是 O(ArrayLen^N) 。即，当 N 确定后，该算法的时间复杂度是 N 次方阶；当 ArrayLen 确定后，该算法的时间复杂度是指数阶。都是高数量级的时间复杂度。

4.  说明 

穷举法解密对系统资源的占用是十分惊人的，在解密的过程中最好不要运行其他应用程序。如果安装有瑞星等杀毒软件，应将杀毒软件的 “office 安全助手 ” 去掉，以便加快程序的运行速度。