Excel使用VBA破解工作表/工作簿密码

　　网上下载了工作簿，发现居然有密码!xxoo，既然放网上干嘛要加密码啊?!后来网上找到使用VBA破解工作表密码的方法，拿来分享。

　　首先，尝试打开工作簿时，提示有密码：

　　使用快捷键Ctrl+F11键，打开VBA编辑界面，点击“插入”菜单下的子菜单“模块”：

　　在模块编辑器中输入以下代码：

　　Option Explicit

　　Public Sub AllInternalPassWords()

　　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

　　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

　　点击运行：

　　破解过程需要几分钟，有几次对话框弹出，都是英文的，留意对话框中如下内容：

　　标注部分即为密码。虽然不是原始密码，但是用这个密码照样可以打开工作簿的。