vbs版的解密base64加密的脚本
作者 佚名
来源 ASP编程
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发布时间 2013-07-09
复制代码 代码如下: FunctionfDecode(sStringToDecode) ''ThisfunctionwilldecodeaBase64encodedstringandreturnsthedecodedstring. ''Thisbecomesusefullwhenattemptingtohidepasswordsfrompryingeyes. ConstCharList="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" DimiDataLength,sOutputString,iGroupInitialCharacter sStringToDecode=Replace(Replace(Replace(sStringToDecode,vbCrLf,""),vbTab,""),"","") iDataLength=Len(sStringToDecode) IfiDataLengthMod4<>0Then fDecode="BadstringpassedtofDecode()function." ExitFunction EndIf ForiGroupInitialCharacter=1ToiDataLengthStep4 DimiDataByteCount,iCharacterCounter,sCharacter,iData,iGroup,sPreliminaryOutString iDataByteCount=3 iGroup=0 ForiCharacterCounter=0To3 sCharacter=Mid(sStringToDecode,iGroupInitialCharacter+iCharacterCounter,1) IfsCharacter="="Then iDataByteCount=iDataByteCount-1 iData=0 Else iData=InStr(1,CharList,sCharacter,0)-1 IfiData=-1Then fDecode="BadstringpassedtofDecode()function." ExitFunction EndIf EndIf 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 EndFunction vbs代码打包 |
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