64 lines
2.7 KiB
JavaScript
64 lines
2.7 KiB
JavaScript
// Jose $decrypt: verifyParam(base64) -> 明文 JSON。
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// 复用 jose_encrypt.js 的单 realm 沙箱; realm.global 暴露 $encrypt/$encode/$decrypt。
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// CLI: node tools/jose_decrypt.js '<verifyParam-base64>' -> stdout: 明文 JSON
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const fs = require("fs"), vm = require("vm"), path = require("path");
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const ENC_PATH = path.join(__dirname, "..", "out", "captcha_net",
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"js_07_rm_static_captcha_js_encrypt_ee7d2a41_js.js");
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const KEY = "c7b645db-65e8-401f-b38c-4c07c5fff247";
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function makeBox() {
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const sandbox = {
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console: { log: () => {}, error: () => {}, warn: () => {} },
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setTimeout, clearTimeout, setImmediate, queueMicrotask, Buffer,
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btoa: (s) => Buffer.from(s, "binary").toString("base64"),
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atob: (s) => Buffer.from(s, "base64").toString("binary"),
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};
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vm.createContext(sandbox);
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sandbox.window = sandbox; sandbox.self = sandbox; sandbox.global = sandbox;
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vm.runInContext(fs.readFileSync(ENC_PATH, "utf-8"), sandbox, { filename: "encrypt.js", timeout: 30000 });
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const factory = sandbox.webpackJsonp[0][1]["088e"];
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const rq = (id) => id === "b639" ? { Buffer } : id === "dd40" ? (x) => x : {};
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const mod = { exports: {} };
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factory(mod, mod.exports, rq);
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if (!sandbox.Jose) throw new Error("Jose 未加载");
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return sandbox;
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}
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function decrypt(sandbox, verifyParamB64) {
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// base64 -> bytes (单 realm: 用沙箱 atob + charCodeAt)
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sandbox.__done = null; sandbox.__out = null;
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vm.runInContext(`
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globalThis.__dec = function(vp){
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var s = globalThis.atob(vp);
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var u8 = new Uint8Array(Array.prototype.map.call(s, function(c){return c.charCodeAt(0);}));
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globalThis.__out=null; globalThis.__done=null;
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Jose.call("$decrypt", [u8, ${JSON.stringify(KEY)}, {
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suc: function(v){ var o=""; for(var i=0;i<v.length;i++) o+=String.fromCharCode(v[i]); globalThis.__out=o; globalThis.__done="ok"; },
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err: function(e){ globalThis.__out="ERR:"+(e&&e.message||e); globalThis.__done="err"; }
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}]);
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};
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`, sandbox);
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vm.runInContext(`__dec(${JSON.stringify(verifyParamB64)});`, sandbox);
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return new Promise((resolve) => {
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const t0 = Date.now();
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const iv = setInterval(() => {
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if (sandbox.__done !== null || Date.now() - t0 > 5000) {
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clearInterval(iv);
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resolve(sandbox.__done === "ok" ? sandbox.__out : (sandbox.__out || "ERR:timeout"));
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}
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}, 5);
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});
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}
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module.exports = { makeBox, decrypt, KEY };
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if (require.main === module) {
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const arg = process.argv[2];
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if (!arg) { console.error("usage: node jose_decrypt.js '<verifyParam-base64>'"); process.exit(2); }
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const box = makeBox();
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decrypt(box, arg).then((out) => {
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if (out && out.indexOf("ERR:") === 0) { console.error(out); process.exit(1); }
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process.stdout.write(out || "");
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});
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}
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