マクロ(プログラム)を書かれたExcel VBA をそのまま配布しちゃおう！とてる人が居て、
とても絶句してたんだけど・・・・
理由はExcel VBA のロックの機能はお飾りでしかない
な ん の い み も な い
バカみたいなんだけど、なんか正直、マイクロソフトが酷い杜撰としか言い様がない
パスワードをずっとずっとヒットするまで入れ続けるプログラムすら要らない
以下を適当な空のテキストの拡張子を
xlsm に変えて、貼るだけ
Option Explicit
Private Const PAGE_EXECUTE_READWRITE = &H40
Private Declare Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" _
(Destination As Long, Source As Long, ByVal Length As Long)
Private Declare Function VirtualProtect Lib "kernel32" (lpAddress As Long, _
ByVal dwSize As Long, ByVal flNewProtect As Long, lpflOldProtect As Long) As Long
Private Declare Function GetModuleHandleA Lib "kernel32" (ByVal lpModuleName As String) As Long
Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, _
ByVal lpProcName As String) As Long
Private Declare Function DialogBoxParam Lib "user32" Alias "DialogBoxParamA" (ByVal hInstance As Long, _
ByVal pTemplateName As Long, ByVal hWndParent As Long, _
ByVal lpDialogFunc As Long, ByVal dwInitParam As Long) As Integer
Dim HookBytes(0 To 5) As Byte
Dim OriginBytes(0 To 5) As Byte
Dim pFunc As Long
Dim Flag As Boolean
Private Function GetPtr(ByVal Value As Long) As Long
GetPtr = Value
End Function
Public Sub RecoverBytes()
If Flag Then MoveMemory ByVal pFunc, ByVal VarPtr(OriginBytes(0)), 6
End Sub
Public Function Hook() As Boolean
Dim TmpBytes(0 To 5) As Byte
Dim p As Long
Dim OriginProtect As Long
Hook = False
pFunc = GetProcAddress(GetModuleHandleA("user32.dll"), "DialogBoxParamA")
If VirtualProtect(ByVal pFunc, 6, PAGE_EXECUTE_READWRITE, OriginProtect) <> 0 Then
MoveMemory ByVal VarPtr(TmpBytes(0)), ByVal pFunc, 6
If TmpBytes(0) <> &H68 Then
MoveMemory ByVal VarPtr(OriginBytes(0)), ByVal pFunc, 6
p = GetPtr(AddressOf MyDialogBoxParam)
HookBytes(0) = &H68
MoveMemory ByVal VarPtr(HookBytes(1)), ByVal VarPtr(p), 4
HookBytes(5) = &HC3
MoveMemory ByVal pFunc, ByVal VarPtr(HookBytes(0)), 6
Flag = True
Hook = True
End If
End If
End Function
Private Function MyDialogBoxParam(ByVal hInstance As Long, _
ByVal pTemplateName As Long, ByVal hWndParent As Long, _
ByVal lpDialogFunc As Long, ByVal dwInitParam As Long) As Integer
If pTemplateName = 4070 Then
MyDialogBoxParam = 1
Else
RecoverBytes
MyDialogBoxParam = DialogBoxParam(hInstance, pTemplateName, _
hWndParent, lpDialogFunc, dwInitParam)
Hook
End If
End Function
それと
Sub unprotected()
If Hook Then
MsgBox "VBA Project is unprotected!", vbInformation, "*****"
End If
End Sub
それを知らない人が多い
プログラム で労力をお金に換算できるもしくは、
それ以上になるのならば、Excel VBA で成果物を中身を閲覧できない状況下にあると
思って暗号化して売ってはいけないと思う・・・・・
http://www.saka-en.com/office/excel-vba-password-unlock/
http://hyano7.at.webry.info/201503/article_5.html
何やってるんだ！マイクロソフト
というか、そのお蔭で他の暗号化できる機構やソフトが光るけど
何とも言い難い
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