Challenge/License Mirroring Decoding

meow.js

// MIRRORING LOGIC START

const originalCreateSessionFn = MediaKeys.prototype.createSession;
MediaKeys.prototype.createSession = function() {
  const session = originalCreateSessionFn.apply(this, arguments);

  session.addEventListener("message", event => {
    const payload = btoa(String.fromCharCode.apply(null, new Uint8Array(event.message)));

    fetch("http://127.0.0.1:1337/dev/widevine/responseLicense", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ license_challenge: payload }),
    })
    .then(response => response.text())
    .then(data => {
      console.log("%c[L33T.MY] - Message event intercepted:", "color: red");
      console.log("%cPayload:", "color: green", payload);
      console.log("%cResponse:", "color: green", data);

      fetch("http://127.0.0.1:1337/dev/widevine/requestLicense", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ license_challenge: payload }),
      })
      .then(response => response.text())
      .then(data => {
        console.log("%c[L33T.MY] - License request sent:", "color: red");
        console.log("%cResponse:", "color: green", data);
      })
      .catch(error => {
        console.error("%cError sending license request:", "color: red", error);
      });
    })
    .catch(error => {
      console.error("%cError fetching license:", "color: red", error);
    });
  });

  const originalUpdateFn = session.update;
  session.update = function(config) {
    console.log("%c[L33T.MY] - Update event intercepted:", "color: red");
    console.log("%cConfig:", "color: green", JSON.stringify(config));
    return originalUpdateFn.apply(this, arguments);
  };

  session.addEventListener("keystatuseschange", event => {
    const keyStatuses = Array.from(event.target.keyStatuses.entries()).map(([keyId, status]) => ({ keyId, status }));
    console.log("%c[L33T.MY] - MediaKeySession::keystatuseschange Session ID: " + session.sessionId, "color: red");
    console.log("%cKey Statuses:", "color: green", JSON.stringify(keyStatuses));
  });

  session.addEventListener("encrypted", event => {
    console.log("%c[L33T.MY] - MediaKeySession::encrypted Session ID: " + session.sessionId, "color: red");
    console.log("%cEncrypted data:", "color: green", event.initData);
    console.log("%cMedia initialization data:", "color: green", event.initDataType);
  });

  return session;
};

const originalSetServerCertificateFn = MediaKeys.prototype.setServerCertificate;
MediaKeys.prototype.setServerCertificate = function(serverCertificate) {
  const base64Certificate = btoa(String.fromCharCode.apply(null, serverCertificate));

  console.log("%c[L33T.MY] - SetServerCertificate event intercepted:", "color: red");
  console.log("%cServer Certificate:", "color: green", JSON.stringify({ certificate: base64Certificate }));

  return originalSetServerCertificateFn.apply(this, arguments);
};

const originalFetch = window.fetch;
window.fetch = function(request, options) {
  if (typeof request === "string" && request.endsWith(".mpd")) {
    console.log("%c[L33T.MY] - MPD manifest requested:", "color: red");
    console.log("%cManifest URL:", "color: green", request);
  }

  return originalFetch.apply(this, arguments);
};