Decode Encoded VBE files

decodeVBE

option explicit
Dim oArgs, NomFichier
'Optional argument : the encoded filename
NomFichier=""
Set oArgs = WScript.Arguments
Select Case oArgs.Count
Case 0 'No Arg, popup a dialog box to choose the file
	NomFichier=BrowseForFolder("Choose an encoded file", &H4031, &H0011)
Case 1
	If Instr(oArgs(0),"?")=0 Then '-? ou /? => aide
		NomFichier=oArgs(0)
	End If
Case Else
	WScript.Echo "Too many parameters"
End Select
Set oArgs = Nothing

If NomFichier<>"" Then
	Dim fso
	Set fso=WScript.CreateObject("Scripting.FileSystemObject")
	If fso.FileExists(NomFichier) Then
		Dim fic,contenu
		Set fic = fso.OpenTextFile(NomFichier, 1)
		Contenu=fic.readAll
		fic.close
		Set fic=Nothing

		Const TagInit="#@~^" '#@~^awQAAA==
		Const TagFin="==^#~@" '& chr(0)
		Dim DebutCode, FinCode
		Do
			FinCode=0
			DebutCode=Instr(Contenu,TagInit)
			If DebutCode>0 Then
				If (Instr(DebutCode,Contenu,"==")-DebutCode)=10 Then 'If "==" follows the tag
					FinCode=Instr(DebutCode,Contenu,TagFin)
					If FinCode>0 Then
						Contenu=Left(Contenu,DebutCode-1) & _
						Decode(Mid(Contenu,DebutCode+12,FinCode-DebutCode-12-6)) & _
						Mid(Contenu,FinCode+6)
					End If
				End If
			End If
		Loop Until FinCode=0
		WScript.Echo Contenu
	Else
		WScript.Echo Nomfichier & " not found"
	End If
	Set fso=Nothing
Else
	WScript.Echo "Please give a filename"
	WScript.Echo "Usage : " & wscript.fullname  & " " & WScript.ScriptFullName & " <filename>"
End If

Function Decode(Chaine)
	Dim se,i,c,j,index,ChaineTemp
	Dim tDecode(127)
	Const Combinaison="1231232332321323132311233213233211323231311231321323112331123132"

	Set se=WSCript.CreateObject("Scripting.Encoder")
	For i=9 to 127
		tDecode(i)="JLA"
	Next
	For i=9 to 127
		ChaineTemp=Mid(se.EncodeScriptFile(".vbs",string(3,i),0,""),13,3)
		For j=1 to 3
			c=Asc(Mid(ChaineTemp,j,1))
			tDecode(c)=Left(tDecode(c),j-1) & chr(i) & Mid(tDecode(c),j+1)
		Next
	Next
	'Next line we correct a bug, otherwise a ")" could be decoded to a ">"
	tDecode(42)=Left(tDecode(42),1) & ")" & Right(tDecode(42),1)
	Set se=Nothing

	Chaine=Replace(Replace(Chaine,"@&",chr(10)),"@#",chr(13))
	Chaine=Replace(Replace(Chaine,"@*",">"),"@!","<")
	Chaine=Replace(Chaine,"@$","@")
	index=-1
	For i=1 to Len(Chaine)
		c=asc(Mid(Chaine,i,1))
		If c<128 Then index=index+1
		If (c=9) or ((c>31) and (c<128)) Then
			If (c<>60) and (c<>62) and (c<>64) Then
				Chaine=Left(Chaine,i-1) & Mid(tDecode(c),Mid(Combinaison,(index mod 64)+1,1),1) & Mid(Chaine,i+1)
			End If
		End If
	Next
	Decode=Chaine
End Function

Function BrowseForFolder(ByVal pstrPrompt, ByVal pintBrowseType, ByVal pintLocation)
	Dim ShellObject, pstrTempFolder, x
	Set ShellObject=WScript.CreateObject("Shell.Application")
	On Error Resume Next
	Set pstrTempFolder=ShellObject.BrowseForFolder(&H0,pstrPrompt,pintBrowseType,pintLocation)
	BrowseForFolder=pstrTempFolder.ParentFolder.ParseName(pstrTempFolder.Title).Path
	If Err.Number<>0 Then BrowseForFolder=""
	Set pstrTempFolder=Nothing
	Set ShellObject=Nothing
End Function