将base64解码为ActiveX JavaScript中的Windows可执行文件

发布于 2025-02-11 05:57:41 字数 954 浏览 0 评论 0原文

我正在尝试使用WSH JavaScript来解码包含可执行文件的base64字符串，然后将EXE写入文件。这是我对解码的功能：

decodeBase64 = function(s) {
    var e={},i,b=0,c,x,l=0,a,r='',w=String.fromCharCode,L=s.length;
    var A="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    for(i=0;i<64;i++){e[A.charAt(i)]=i;}
    for(x=0;x<L;x++){
        c=e[s.charAt(x)];b=(b<<6)+c;l+=6;
        while(l>=8){((a=(b>>>(l-=8))&0xff)||(x<(L-2)))&&(r+=w(a));}
    }
    return r;
};

它适用于解码，但是当我尝试将解码字符串写入文件时，我会遇到一个错误，说“无效的过程调用或参数”。我怀疑这是由于编码是错误的。这是该代码：

var FSO = new ActiveXObject("Scripting.FileSystemObject");
var f = FSO.CreateTextFile(Path, true, false);
f.Write(decodeBase64(data));
f.Close();

现在，我知道您可以使用ISO-8859-1编码进行ADODB.Stream进行编码，并将其读取为Windows-1252编码，但是我在我所处的环境中没有它。还有另一种方法可以解码base64字符串，该字符串包含JavaScript中的EXE，在Windows ANSI编码中，然后将其保存到文件中？可能是一种将DecodeBase64函数结果编码转换为可以作为有效EXE编写的编码的方法？

原文

I'm trying to, with WSH JavaScript, decode a base64 string containing an executable file, and write the EXE to a file. This is the function I have for decoding:

decodeBase64 = function(s) {
    var e={},i,b=0,c,x,l=0,a,r='',w=String.fromCharCode,L=s.length;
    var A="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    for(i=0;i<64;i++){e[A.charAt(i)]=i;}
    for(x=0;x<L;x++){
        c=e[s.charAt(x)];b=(b<<6)+c;l+=6;
        while(l>=8){((a=(b>>>(l-=8))&0xff)||(x<(L-2)))&&(r+=w(a));}
    }
    return r;
};

It works for the decoding but when I try to write the decoded string to a file, I get an error saying "Invalid procedure call or argument". I suspect that's due to the encoding being wrong. Here's that code:

var FSO = new ActiveXObject("Scripting.FileSystemObject");
var f = FSO.CreateTextFile(Path, true, false);
f.Write(decodeBase64(data));
f.Close();

Now, I know you can make a ADODB.Stream with ISO-8859-1 encoding and read it out as Windows-1252 encoding, but I don't have that in the environment I'm in. Is it possible that there is another way to decode a Base64 string, containing an EXE in JavaScript, in the Windows ANSI encoding then save that to a file? Possibly a way to convert the encoding of the result of the decodeBase64 function to an encoding that I could write as a valid EXE?

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