Please note that this method will only removes the
protection from the excel file and not the password used to open the excel
file itself.
Open the
excel file which is password protected and go to Macro's. Click on
"Record Macro>> OK" and then click on "Stop Recording" from the same menu.
Now go to "View Macros", you will find a macro with a default name E.g.
Macro1. Select the macro name and click on Edit. Now a Visual Basic
Editor opens up. Replace the default code and paste the below Code and
just close it.
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' modUnlockRoutines
'
' Module provides Excel workbook and sheet unlock routines. The algorithm
' relies on a backdoor password that can be 1 to 9 characters long where
each
' character is either an "A" or "B" except the last which can be any
character
' from ASCII code 32 to 255.
'
' Implemented as a regular module for use with any Excel VBA project.
'
' Dependencies:
'
' None
'
' © 2007 Kevin M. Jones
Option Explicit
Private Sub DisplayStatus( _
ByVal PasswordsTried As Long _
)
' Display the status in the Excel status bar.
'
' Syntax
'
' DisplayStatus(PasswordsTried)
'
' PasswordsTried - The number of passwords tried thus far.
Static LastStatus As String
LastStatus = Format(PasswordsTried / 57120, "0%") & " of possible passwords
tried."
If Application.StatusBar <> LastStatus Then
Application.StatusBar = LastStatus
DoEvents
End If
End Sub
Private Function TrySheetPasswordSize( _
ByVal Size As Long, _
ByRef PasswordsTried As Long, _
ByRef Password As String, _
Optional ByVal Base As String _
) As Boolean
' Try unlocking the sheet with all passwords of the specified size.
'
' TrySheetPasswordSize(Size, PasswordsTried, Password, [Base])
'
' Size - The size of the password to try.
'
' PasswordsTried - The cummulative number of passwords tried thus far.
'
' Password - The current password.
'
' Base - The base password from the calling routine.
Dim Index As Long
On Error Resume Next
If IsMissing(Base) Then Base = vbNullString
If Len(Base) < Size - 1 Then
For Index = 65 To 66
If TrySheetPasswordSize(Size, PasswordsTried, Password, Base & Chr(Index))
Then
TrySheetPasswordSize = True
Exit Function
End If
Next Index
ElseIf Len(Base) < Size Then
For Index = 32 To 255
ActiveSheet.Unprotect Base & Chr(Index)
If Not ActiveSheet.ProtectContents Then
TrySheetPasswordSize = True
Password = Base & Chr(Index)
Exit Function
End If
PasswordsTried = PasswordsTried + 1
Next Index
End If
On Error GoTo 0
DisplayStatus PasswordsTried
End Function
Private Function TryWorkbookPasswordSize( _
ByVal Size As Long, _
ByRef PasswordsTried As Long, _
ByRef Password As String, _
Optional ByVal Base As String _
) As Boolean
' Try unlocking the workbook with all passwords of the specified size.
'
' TryWorkbookPasswordSize(Size, PasswordsTried, Password, [Base])
'
' Size - The size of the password to try.
'
' PasswordsTried - The cummulative number of passwords tried thus far.
'
' Password - The current password.
'
' Base - The base password from the calling routine.
Dim Index As Long
On Error Resume Next
If IsMissing(Base) Then Base = vbNullString
If Len(Base) < Size - 1 Then
For Index = 65 To 66
If TryWorkbookPasswordSize(Size, PasswordsTried, Password, Base & Chr(Index))
Then
TryWorkbookPasswordSize = True
Exit Function
End If
Next Index
ElseIf Len(Base) < Size Then
For Index = 32 To 255
ActiveWorkbook.Unprotect Base & Chr(Index)
If Not ActiveWorkbook.ProtectStructure And Not ActiveWorkbook.ProtectWindows
Then
TryWorkbookPasswordSize = True
Password = Base & Chr(Index)
Exit Function
End If
PasswordsTried = PasswordsTried + 1
Next Index
End If
On Error GoTo 0
DisplayStatus PasswordsTried
End Function
Public Sub UnlockSheet()
' Unlock the active sheet using a backdoor Excel provides where an alternate
' password is created that is more limited.
Dim PasswordSize As Variant
Dim PasswordsTried As Long
Dim Password As String
PasswordsTried = 0
If Not ActiveSheet.ProtectContents Then
MsgBox "The sheet is already unprotected."
Exit Sub
End If
On Error Resume Next
ActiveSheet.Protect ""
ActiveSheet.Unprotect ""
On Error GoTo 0
If ActiveSheet.ProtectContents Then
For Each PasswordSize In Array(5, 4, 6, 7, 8, 3, 2, 1)
If TrySheetPasswordSize(PasswordSize, PasswordsTried, Password) Then Exit
For
Next PasswordSize
End If
If Not ActiveSheet.ProtectContents Then
MsgBox "The sheet " & ActiveSheet.Name & " has been unprotected with
password '" & Password & "'."
End If
Application.StatusBar = False
End Sub
Public Sub UnlockWorkbook()
' Unlock the active workbook using a backdoor Excel provides where an
alternate
' password is created that is more limited.
Dim PasswordSize As Variant
Dim PasswordsTried As Long
Dim Password As String
PasswordsTried = 0
If Not ActiveWorkbook.ProtectStructure And Not ActiveWorkbook.ProtectWindows
Then
MsgBox "The workbook is already unprotected."
Exit Sub
End If
On Error Resume Next
ActiveWorkbook.Unprotect vbNullString
On Error GoTo 0
If ActiveWorkbook.ProtectStructure Or ActiveWorkbook.ProtectWindows Then
For Each PasswordSize In Array(5, 4, 6, 7, 8, 3, 2, 1)
If TryWorkbookPasswordSize(PasswordSize, PasswordsTried, Password) Then Exit
For
Next PasswordSize
End If
If Not ActiveWorkbook.ProtectStructure And Not ActiveWorkbook.ProtectWindows
Then
MsgBox "The workbook " & ActiveWorkbook.Name & " has been unprotected with
password '" & Password & "'." & " Revealed by PAVULURI
VIKRAM"
End If
Application.StatusBar = False
End Sub
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