EXCEL密码破解

EXCEL密码破解 EXCEL密码破解 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,运行,确定两次,等2分钟,再确定.OK,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 w1 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, _ "$$", PWord1), vbInformation, HEADER Exit Do 'Bypass all for...nexts End If End With Next: Next: Next: Next: Next: Next Next: Next: Next: Next: Next: Next Loop Until True On Error GoTo 0 End If If WinTag And Not ShTag Then MsgBox MSGONLYONE, vbInformation, HEADER Exit Sub End If On Error Resume Next For Each w1 In Worksheets 'Attempt clearance with PWord1 w1.Unprotect PWord1 Next w1 On Error GoTo 0 ShTag = False For Each w1 In Worksheets 'Checks for all clear ShTag triggered to 1 if not. ShTag = ShTag Or w1.ProtectContents Next w1 If ShTag Then For Each w1 In Worksheets With w1 If .ProtectContents Then On Error Resume Next Do 'Dummy do loop For i = 65 To 66: For j = 65 To 66: For k = 65 To 66 For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66 For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66 For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126 .Unprotect Chr(i) & Chr(j) & Chr(k) & _ Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _ Chr(i4) & Chr(i5) & Chr(i6) & Chr(n) If Not .ProtectContents Then PWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _ Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _ Chr(i4) & Chr(i5) & Chr(i6) & Chr(n) MsgBox Application.Substitute(MSGPWORDFOUND2, _ "$$", PWord1), vbInformation, HEADER 'leverage finding Pword by trying on other sheets For Each w2 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 Then         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 Then         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。 该程序在WinXP+OfficeXP+VB6.0环境下测试通过，笔者随便测试了一个5位数字密码，在P4机器上，8分钟左右即可解开口令。