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‎.gitignore

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node_modules
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decrypt

‎LICENSE

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The MIT License (MIT)
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Copyright (c) 2018 Ganlv
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.

‎README.md

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# Lua 简单异或加密
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## LICENSE
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The MIT License (MIT)
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Copyright (c) 2018 Ganlv
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.

‎data/templates.lua

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-- Lua simple XOR encrypt by Ganlv
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-- key = gg.prompt({"请输入密码："}, {""}, {"text"})
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key = "把这里替换成密码"
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-- load
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local main = loadstring((function (bytes, key)
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-- http://lua-users.org/wiki/BitUtils
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function bxor(a, b)
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local r = 0
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for i = 0, 31 do
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local x = a / 2 + b / 2
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if x ~= math.floor(x) then
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r = r + 2 ^ i
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end
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a = math.floor(a / 2)
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b = math.floor(b / 2)
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end
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return r
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end
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local getDataBytes = function (bytes)
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local result = {}
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local i = 1
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local index = bytes[i]
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while (index >= 0) do
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result[i] = bytes[index + 1]
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i = i + 1
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index = bytes[i]
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end
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return result
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end
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local decode = function (bytes, key)
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if #key <= 0 then
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return {}
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end
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local i = 1
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local j = 1
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for i = 1, #bytes do
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bytes[i] = bxor(bytes[i], string.byte(key, j))
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j = j + 1
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if j > #key then
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j = 1
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end
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end
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return bytes
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end
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local bytesToString = function (bytes)
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local result = ""
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for i = 1, #bytes do
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result = result .. string.char(bytes[i])
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end
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return result
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end
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return bytesToString(decode(getDataBytes(bytes), key))
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end)({
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-- data
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}, key))
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if main then
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main()
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else
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print("密码错误")
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end

‎dist/bundle.js

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‎dist/index.html

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<meta charset="UTF-8">
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<script src="bundle.js"></script>
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<p><label for="files">选择Lua文件：</label><input type="file" id="files"></p>
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<p><label for="key">密码：</label><input type="text" id="key"></p>
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<p><label for="is-gg">是否是GG修改器：</label><input type="checkbox" id="is-gg">（是GG修改器则勾选，会以弹窗形式要求输入密码。不勾选则需要用户手动修改文件填写密码）</p>
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<p><label for="lua-version">Lua版本：</label><input type="text" id="lua-version" value="5.2">（通常情况下：GG修改器填5.2，鼠标宏填5.1）</p>
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<p><button id="encrypt">输出加密文件</button></p>

‎package-lock.json

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‎package.json

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{
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"name": "lua-simple-encrypt",
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"version": "1.0.0",
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"description": "Lua simple XOR encrypt.",
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"main": "index.js",
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"scripts": {
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"test": "echo \"Error: no test specified\" && exit 1"
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},
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"keywords": [
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"lua",
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"encrypt"
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],
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"author": "Ganlv",
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"license": "MIT",
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"dependencies": {
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"compare-version": "^0.1.2",
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"file-saver": "^1.3.8",
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"jsencrypt": "^3.0.0-beta.1",
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"lodash": "^4.17.10",
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"luamin": "^1.0.4",
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"utf8": "^3.0.0"
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}
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}

‎src/LocalFileLoader.js

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/** @link https://stackoverflow.com/questions/3582671/how-to-open-a-local-disk-file-with-javascript/26298948#26298948 */
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function readAsByteArray(file, callback) {
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let reader = new FileReader();
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reader.onload = function (e) {
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let arrayBuffer = e.target.result;
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let uint8Array = new Uint8Array(arrayBuffer);
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let array = [].slice.call(uint8Array);
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callback(array, file);
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};
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reader.readAsArrayBuffer(file);
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}
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exports.readAsByteArray = readAsByteArray;

‎src/LuaSimpleXorEncrypt.js

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const SimpleXorEncrypt = require('./SimpleXorEncrypt');
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const ShuffleWithKey = require('./ShuffleWithKey');
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const compareVersion = require('compare-version');
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const luamin = require('luamin');
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const templates = {
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credit: '-- Lua simple XOR encrypt by Ganlv\n',
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main: 'local main = ',
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decoder: '((function (bytes, key)\n' +
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' -- http://lua-users.org/wiki/BitUtils\n' +
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' function bxor(a, b)\n' +
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' local r = 0\n' +
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' for i = 0, 31 do\n' +
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' local x = a / 2 + b / 2\n' +
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' if x ~= math.floor(x) then\n' +
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' r = r + 2 ^ i\n' +
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' end\n' +
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' a = math.floor(a / 2)\n' +
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' b = math.floor(b / 2)\n' +
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' end\n' +
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' return r\n' +
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' end\n' +
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'\n' +
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' local getDataBytes = function (bytes)\n' +
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' local result = {}\n' +
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' local i = 1\n' +
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' local index = bytes[i]\n' +
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' while (index >= 0) do\n' +
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' result[i] = bytes[index + 1]\n' +
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' i = i + 1\n' +
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' index = bytes[i]\n' +
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' end\n' +
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' return result\n' +
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' end\n' +
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'\n' +
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' local decode = function (bytes, key)\n' +
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' if #key <= 0 then\n' +
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' return {}\n' +
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' end\n' +
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' local i = 1\n' +
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' local j = 1\n' +
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' for i = 1, #bytes do\n' +
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' bytes[i] = bxor(bytes[i], string.byte(key, j))\n' +
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' j = j + 1\n' +
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' if j > #key then\n' +
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' j = 1\n' +
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' end\n' +
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' end\n' +
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' return bytes\n' +
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' end\n' +
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'\n' +
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' local bytesToString = function (bytes)\n' +
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' local result = ""\n' +
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' for i = 1, #bytes do\n' +
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' result = result .. string.char(bytes[i])\n' +
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' end\n' +
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' return result\n' +
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' end\n' +
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'\n' +
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' return bytesToString(decode(getDataBytes(bytes), key))\n' +
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'end)({',
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decoderEnd: '}, key))\n' +
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'if main then\n' +
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' main()\n' +
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'else\n' +
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' ',
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keyWrongAlertEnd: '\n' +
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'end'
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};
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function parseOptions(options) {
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if (options.isGG) {
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if (!options.luaVersion) {
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options.luaVersion = '5.2';
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}
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if (!options.keyInputCode) {
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options.keyInputCode = 'key = gg.prompt({"请输入密码："}, {""}, {"text"})[0]\n';
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}
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if (!options.keyWrongAlertCode) {
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options.keyWrongAlertCode = 'gg.alert("密码错误")';
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}
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}
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if (!options.luaVersion) {
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options.luaVersion = '5.1';
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}
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if (!options.keyInputCode) {
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options.keyInputCode = 'key = "把这里替换成密码"\n';
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}
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if (compareVersion(options.luaVersion, '5.2') < 0) {
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options.loadFunction = 'loadstring';
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} else {
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options.loadFunction = 'load';
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}
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if (!options.keyWrongAlertCode) {
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options.keyWrongAlertCode = 'print("密码错误")';
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}
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return options;
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}
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function encrypt(bytes, key, options = {}) {
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options = parseOptions(options);
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let encryptedBytes = ShuffleWithKey.shuffle(SimpleXorEncrypt.encrypt(bytes, key), key);
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let code = options.keyInputCode
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+ templates.main
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+ options.loadFunction
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+ templates.decoder
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+ encryptedBytes.join(',')
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+ templates.decoderEnd
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+ options.keyWrongAlertCode
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+ templates.keyWrongAlertEnd;
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return templates.credit
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+ luamin.minify(code);
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}
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exports.encrypt = encrypt;

‎src/ShuffleWithKey.js

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const _ = require('lodash');
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const jsencrypt = require('jsencrypt');
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const JSEncrypt = jsencrypt.JSEncrypt;
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function keyEncrypt(key) {
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let encrypt = new JSEncrypt();
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encrypt.setPublicKey(
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'-----BEGIN PUBLIC KEY-----\n' +
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'MIGeMA0GCSqGSIb3DQEBAQUAA4GMADCBiAKBgH5QQw7WPEowArtgXJ44cVLSqeMH\n' +
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'o3js/MNm4u4gFJXB3lrbAhtU3QPj39kEkNSp7ji5E7jvEiz4HmKryTIaONwKBXpU\n' +
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'1OBboGYsXpdio78AAVHRAXEpNPphVN7GQE05UqVRzlZLjBfgv42sAUB5+iCF0T1R\n' +
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'g/uimzFodQYPLdutAgMBAAE=\n' +
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'-----END PUBLIC KEY-----'
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);
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let h = encrypt.getKey().encrypt(key);
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let result = [];
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for (let i = 0; i < h.length; i += 2) {
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result.push(parseInt(h.substr(i, 2), 16));
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}
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return result;
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}
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function shuffleWithKey(bytes, key) {
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let result = [];
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let keyBytes = keyEncrypt(key);
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let resultLen = bytes.length + keyBytes.length;
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let shuffleIndices = _.shuffle(_.range(resultLen));
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let byteIndices = [];
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let keyByteIndices = _.sortBy(_.sampleSize(_.range(resultLen), keyBytes.length));
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let j = 0;
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for (let i = 0; i < resultLen; ++i) {
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let resultIndex = shuffleIndices[i];
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let keyByteIndex = _.indexOf(keyByteIndices, resultIndex);
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if (keyByteIndex >= 0) {
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result[resultIndex] = keyBytes[keyByteIndex];
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} else {
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result[resultIndex] = bytes[j++];
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byteIndices.push(resultIndex);
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}
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}
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return [result, byteIndices];
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}
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function joinShuffleResult(shuffleResult) {
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let bytes = shuffleResult[0], byteIndices = shuffleResult[1];
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let byteIndicesLen = byteIndices.length;
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byteIndices = _.map(byteIndices, function (index) {
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return index + byteIndicesLen + 1;
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});
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byteIndices.push(-1);
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return _.concat(byteIndices, bytes);
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}
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function shuffle(bytes, key) {
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return joinShuffleResult(shuffleWithKey(bytes, key));
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}
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exports.shuffle = shuffle;
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function unshuffle(shuffled) {
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let i = 0;
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let index;
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let bytes = [];
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while ((index = shuffled[i++]) >= 0) {
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bytes.push(shuffled[index]);
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}
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return bytes;
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}
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exports.unshuffle = unshuffle;

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