Add js injection to obtain reese84 token from the server

Author: Jack Li

.gitignore

@@ -0,0 +1 @@
+js/reese84.js

js/injector.js

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+/* THE CODE BELOW SHOULD BE INJECTED TO THE JS FILE
+   AT https://epsf.ticketmaster.com/eps-d 
+   IN ORDER TO OBTAIN A REESE84 TOKEN FROM THE SERVER */
+
+/**
+ * Reference: https://epsf.ticketmaster.com/eps-d
+ */
+const reese84HashObj = {
+  hash: function (_0x32cda0) {
+    _0x32cda0 = unescape(encodeURIComponent(_0x32cda0));
+    for (
+      var _0x354dff = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6],
+        _0x184815 =
+          (_0x32cda0 += String['fromCharCode'](0x80))['length'] / 0x4 + 0x2,
+        _0x4f0814 = Math['ceil'](_0x184815 / 0x10),
+        _0xb67cd8 = new Array(_0x4f0814),
+        _0x3db23f = 0x0;
+      _0x3db23f < _0x4f0814;
+      _0x3db23f++
+    ) {
+      _0xb67cd8[_0x3db23f] = new Array(0x10);
+      for (var _0x4d1d12 = 0x0; _0x4d1d12 < 0x10; _0x4d1d12++)
+        _0xb67cd8[_0x3db23f][_0x4d1d12] =
+          (_0x32cda0['charCodeAt'](0x40 * _0x3db23f + 0x4 * _0x4d1d12) <<
+            0x18) |
+          (_0x32cda0['charCodeAt'](0x40 * _0x3db23f + 0x4 * _0x4d1d12 + 0x1) <<
+            0x10) |
+          (_0x32cda0['charCodeAt'](0x40 * _0x3db23f + 0x4 * _0x4d1d12 + 0x2) <<
+            0x8) |
+          _0x32cda0['charCodeAt'](0x40 * _0x3db23f + 0x4 * _0x4d1d12 + 0x3);
+    }
+    (_0xb67cd8[_0x4f0814 - 0x1][0xe] =
+      (0x8 * (_0x32cda0['length'] - 0x1)) / Math['pow'](0x2, 0x20)),
+      (_0xb67cd8[_0x4f0814 - 0x1][0xe] = Math['floor'](
+        _0xb67cd8[_0x4f0814 - 0x1][0xe]
+      )),
+      (_0xb67cd8[_0x4f0814 - 0x1][0xf] =
+        (0x8 * (_0x32cda0['length'] - 0x1)) & 0xffffffff);
+    var _0x4964ee,
+      _0x1f8408,
+      _0x393864,
+      _0x4e34f7,
+      _0x2bdc40,
+      _0x725508 = 0x67452301,
+      _0x69fa2d = 0xefcdab89,
+      _0xc2205d = 0x98badcfe,
+      _0x4d6fc6 = 0x10325476,
+      _0x531366 = 0xc3d2e1f0,
+      _0xe1407f = new Array(0x50);
+    for (_0x3db23f = 0x0; _0x3db23f < _0x4f0814; _0x3db23f++) {
+      for (var _0x19ef55 = 0x0; _0x19ef55 < 0x10; _0x19ef55++)
+        _0xe1407f[_0x19ef55] = _0xb67cd8[_0x3db23f][_0x19ef55];
+      for (_0x19ef55 = 0x10; _0x19ef55 < 0x50; _0x19ef55++)
+        _0xe1407f[_0x19ef55] = reese84HashObj['ROTL'](
+          _0xe1407f[_0x19ef55 - 0x3] ^
+            _0xe1407f[_0x19ef55 - 0x8] ^
+            _0xe1407f[_0x19ef55 - 0xe] ^
+            _0xe1407f[_0x19ef55 - 0x10],
+          0x1
+        );
+      (_0x4964ee = _0x725508),
+        (_0x1f8408 = _0x69fa2d),
+        (_0x393864 = _0xc2205d),
+        (_0x4e34f7 = _0x4d6fc6),
+        (_0x2bdc40 = _0x531366);
+      for (_0x19ef55 = 0x0; _0x19ef55 < 0x50; _0x19ef55++) {
+        var _0x1f693f = Math['floor'](_0x19ef55 / 0x14),
+          _0x1e561e =
+            (reese84HashObj['ROTL'](_0x4964ee, 0x5) +
+              reese84HashObj['f'](_0x1f693f, _0x1f8408, _0x393864, _0x4e34f7) +
+              _0x2bdc40 +
+              _0x354dff[_0x1f693f] +
+              _0xe1407f[_0x19ef55]) &
+            0xffffffff;
+        (_0x2bdc40 = _0x4e34f7),
+          (_0x4e34f7 = _0x393864),
+          (_0x393864 = reese84HashObj['ROTL'](_0x1f8408, 0x1e)),
+          (_0x1f8408 = _0x4964ee),
+          (_0x4964ee = _0x1e561e);
+      }
+      (_0x725508 = (_0x725508 + _0x4964ee) & 0xffffffff),
+        (_0x69fa2d = (_0x69fa2d + _0x1f8408) & 0xffffffff),
+        (_0xc2205d = (_0xc2205d + _0x393864) & 0xffffffff),
+        (_0x4d6fc6 = (_0x4d6fc6 + _0x4e34f7) & 0xffffffff),
+        (_0x531366 = (_0x531366 + _0x2bdc40) & 0xffffffff);
+    }
+    return (
+      reese84HashObj['toHexStr'](_0x725508) +
+      reese84HashObj['toHexStr'](_0x69fa2d) +
+      reese84HashObj['toHexStr'](_0xc2205d) +
+      reese84HashObj['toHexStr'](_0x4d6fc6) +
+      reese84HashObj['toHexStr'](_0x531366)
+    );
+  },
+  f: function (_0x4a2ab7, _0x15ec48, _0x2f0b8e, _0x6ffd09) {
+    switch (_0x4a2ab7) {
+      case 0x0:
+        return (_0x15ec48 & _0x2f0b8e) ^ (~_0x15ec48 & _0x6ffd09);
+      case 0x1:
+      case 0x3:
+        return _0x15ec48 ^ _0x2f0b8e ^ _0x6ffd09;
+      case 0x2:
+        return (
+          (_0x15ec48 & _0x2f0b8e) ^
+          (_0x15ec48 & _0x6ffd09) ^
+          (_0x2f0b8e & _0x6ffd09)
+        );
+    }
+  },
+  ROTL: function (_0x11e783, _0x3f2f62) {
+    return (_0x11e783 << _0x3f2f62) | (_0x11e783 >>> (0x20 - _0x3f2f62));
+  },
+  toHexStr: function (_0x125300) {
+    for (var _0x39e29d = '', _0xa51676 = 0x7; _0xa51676 >= 0x0; _0xa51676--)
+      _0x39e29d += ((_0x125300 >>> (0x4 * _0xa51676)) & 0xf)['toString'](0x10);
+    return _0x39e29d;
+  },
+};
+
+/**
+ * Reference: https://epsf.ticketmaster.com/eps-d
+ */
+function _0xbae375() {
+  return Date['now'] ? Date['now']() : new Date()['getTime']();
+}
+
+/**
+ * Reference: https://epsf.ticketmaster.com/eps-d
+ */
+const timerFactory = (function () {
+  /**
+    * 
+    * start: ƒ (_0x3deed1)
+      startInternal: ƒ (_0xd257e7)
+      stop: ƒ (_0x975271)
+      stopInternal: ƒ (_0x2f5e67)
+      summary: ƒ ()
+    */
+  function _0x1efe8f() {
+    (this['marks'] = {}), (this['measures'] = {});
+  }
+  return (
+    (_0x1efe8f['prototype']['start'] = function (_0x3deed1) {
+      this['marks'][_0x3deed1] = _0xbae375();
+    }),
+    (_0x1efe8f['prototype']['startInternal'] = function (_0xd257e7) {}),
+    (_0x1efe8f['prototype']['stop'] = function (_0x975271) {
+      this['measures'][_0x975271] = _0xbae375() - this['marks'][_0x975271];
+    }),
+    (_0x1efe8f['prototype']['stopInternal'] = function (_0x2f5e67) {}),
+    (_0x1efe8f['prototype']['summary'] = function () {
+      return this['measures'];
+    }),
+    _0x1efe8f
+  );
+})();
+
+/* injector code starts here */
+
+const getInterrogation = async () => {
+  const INTERROGATOR = 'reese84interrogator',
+    INTERROGATION = 'interrogate';
+  const interrogationFn = window[INTERROGATOR];
+  if (!interrogationFn) {
+    throw new Error('Interrogation function not extracted');
+  }
+  let fn = {};
+  const timer = new timerFactory();
+  timer.start('total');
+
+  interrogationFn.call(fn, reese84HashObj.hash, timer);
+  const res = await new Promise(fn[INTERROGATION]);
+  return [res, timer];
+};
+
+/**
+ * main function
+ */
+(async function () {
+  const [reese84, timer] = await getInterrogation();
+  const body = {
+    error: null,
+    old_token: null,
+    performance: { interrogation: timer.measures.interrogation },
+    solution: { interrogation: reese84 },
+  };
+  console.log(body);
+  return body;
+})();