compile-flash-exe.js

var fs = require("fs-extra");

function make_title_buffer(s) {
    return Buffer.from(s.split("").join("\0"));
}

var flash_player_version = 18;
var orig_title = `Adobe Flash Player ${flash_player_version}`
var orig_title_buffer = make_title_buffer(orig_title);
var new_title = "Wasted Youth, Part 1";
var new_title_buffer = make_title_buffer(new_title.slice(0, orig_title.length));

(async()=>{
    var buffers = [];
    var fp = await fs.readFile("flashplayer_18_sa2.exe");
    var i = 0;
    while (true) {
        i = fp.indexOf(orig_title_buffer, i);
        if (i == -1) break;
        fp.fill(0, i, i + orig_title_buffer.length)
        new_title_buffer.copy(fp, i)
        i += orig_title_buffer.length;
    }
    buffers.push(fp);
    var swf = await fs.readFile("wrapper.swf");
    buffers.push(swf);
    var end = [0x56, 0x34, 0x12, 0xFA];
    var sizeTemp = swf.length;
    while (sizeTemp>0) {
        end.push(sizeTemp % 0x100);
        sizeTemp = Math.floor(sizeTemp / 0x100);
    }
    while (end.length<8) {
        end.push(0x00);
    }
    buffers.push(Buffer.from(end));
    var data = Buffer.concat(buffers);
    await fs.writeFile(`${new_title}.exe`, data);
})();