如何使用vbs实现解密base64加密的脚本

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代码如下:

Function fDecode(sStringToDecode)  'This function will decode a Base64 encoded string and returns the decoded string.  'This becomes usefull when attempting to hide passwords from prying eyes.  Const CharList = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"  Dim iDataLength, sOutputString, iGroupInitialCharacter  sStringToDecode = Replace(Replace(Replace(sStringToDecode, vbCrLf, ""), vbTab, ""), " ", "")  iDataLength = Len(sStringToDecode)  If iDataLength Mod 4 <> 0 Then  fDecode = "Bad string passed to fDecode() function."  Exit Function  End If  For iGroupInitialCharacter = 1 To iDataLength Step 4  Dim iDataByteCount, iCharacterCounter, sCharacter, iData, iGroup, sPreliminaryOutString  iDataByteCount = 3  iGroup = 0     For iCharacterCounter = 0 To 3      sCharacter = Mid(sStringToDecode, iGroupInitialCharacter + iCharacterCounter, 1)       If sCharacter = "=" Then        iDataByteCount = iDataByteCount - 1        iData = 0       Else        iData = InStr(1, CharList, sCharacter, 0) - 1         If iData = -1 Then          fDecode = "Bad string passed to fDecode() function."          Exit Function         End If       End If      iGroup = 64 * iGroup + iData     Next  iGroup = Hex(iGroup)  iGroup = String(6 - Len(iGroup), "0") & iGroup  sPreliminaryOutString = Chr(CByte("&H" & Mid(iGroup, 1, 2))) & Chr(CByte("&H" & Mid(iGroup, 3, 2))) & Chr(CByte("&H" & Mid(iGroup, 5, 2)))  sOutputString = sOutputString & Left(sPreliminaryOutString, iDataByteCount)  Next  fDecode = sOutputString  End Function

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