CoolStar just released Electra for iOS 11.2-11.3.1 today (2018.07.07).

Electra for iOS 11.2-11.3.1 is now available! https://t.co/YxbYAmMkVK

Note: First run will require rebooting. Make sure to re-run electra after the first reboot to continue jailbreak.

— CoolStar (@coolstarorg) 2018年7月6日

This tutorial shows how to install Electra IPA (Multipath TCP version) on your device with paid Apple developer account. Make sure you have basic knowledge for this tutorial, you are fully doing this at your own risk, I’m not responsible for any damage or data losing… etc.
此教學是教你安裝 iOS 11.2~11.3.1 的越獄工具 – Electra，前提是你擁有「付費的」開發者帳號及基本知識，意思是說手機爆炸我不管。

1st. What you need / 必備工具

• Electra ipa (Multipath TCP version)
• Apple developer account，you should login your Apple Developer account into Xcode first.
• Resign tool，recommend IOS Appsigner
• ipa install tool, such as iFunbox..etc
  

And we start!

2nd. Create a provision file only for Electra

For supporting the requirement of Electra dev version – Multipath TCP service, you need to create a provision file with multipath TCP service enabled in your developer account.
此次 Electra 開發者版本是使用 Multipath TCP 漏洞，因此我們需要使用一組開啟 Multipath TCP 功能的 provision profile。

Remind to add your device UDID to your account before you create provision file. You can check this Tutorial if you don’t know how to add your device into your account.
再開始之前，記得先將你的裝置 UDID 註冊到你的開發者帳號，可以參考教學

2-1. Registering a new App ID in App ID page of Identifier section

進入開發者帳號頁面後，我們選擇右側 Identifier → AppID → 並註冊一組新的 App ID

2-2. Fill in your custom bundle ID, for example, I used tw.garynil.Electra1131

填入 Bundle ID，建議用「你常用的名稱」+ Electra1131，例如我是 tw.garynil.Electra1131

2-3. Enable Multipath TCP serivce for your provision file

為此組 App ID 開啟 Multipath TCP 服務

完成後，我們便創立了一組只為此次 JB 使用並有 Multipath TCP 服務的 AppID

2-4. Then get into the Provision Profile section and create new iOS Provision Profile

接下來我們將建立剛剛創立的 App ID 的 Provision Profile，我們先進入右側 Provision Profile 區塊並按+號

2-5. Choose the App ID we create previously.

我們為此組欲建立的 Provision Profile 選擇剛剛創立的 App ID

2-6. Choose devices you would like to install.

選擇你要適用的裝置

2-6. Finally, we can download the Provision Profile we created.

將剛剛建立的 Provision Profile 下載至你的電腦

3rd. Extract resigned Electra ipa / 重簽名 ipa

We open the Resign tool IOS Appsigner and selected：
– Input file：the newest Electra ipa / 最新版 Electra ipa
– Signing Certificate：Your iPhone Developer Certificate / 你的開發者帳號憑證，記得先於 Xcode 登入它才抓的到
– Provisioning Profile：Download from apple developer page we created on last step. / 剛剛製作並下載的 Provisioning Profile

Press start then it will resign and extract the ipa for you.
按下開始他便依照你的設定重簽名了

註：如果出現錯誤，檢查你的 ipa 內的 Payload/Electra1131.app/embedded.mobileprovision 是否有 multipath 這行，以及你的裝置的 udid。

4th. Install on your device / 在裝置上安裝 Electra ipa

After these steps, you can install this ipa on your device by tools such as Apple Configurator、iFunbox…etc
用 Apple Configurator、iFunbox 等工具安裝你剛剛建立的 ipa 吧！

這篇文章 [Tutorial / 教學] Get Electra (Multipath TCP) installed on iOS 11.2~11.3.1 / 安裝開發者版本的 Electra (iOS 11.2~11.3.1) 最早出現於 Gary's ...Lasamia。

The most important of all, before you start to read this guide, make sure you have the ability to handle the problem you meet. You are fully doing this at your own risk, I’m not responsible for any damage caused.

If you don’t know what this article is doing, you can download the released ipa on the author website resign by tools such as iResign and install it to your iPhone without building it youself.

Advantage of build the toolkit yourself

1. Know the structure of the code
2. Preventing if there were malicious code in toolkit.
3. Remove unused features. For example, in this toolkit, it will install Anemone tweak after you jailbreak. The last part in this tutorial will told you how to do it.
4. Keep the latest version, you can pull the latest version from Github and build it yourself.
5. You need to turn the SIP off of macOS before you did these instructions.

Clone repo

You can access the Electra repo on Github, which contain a Xcode project.
Clone it to your ~/Desktop or any other path you like to work with.

git clone https://github.com/coolstar/electra.git

Build Xcode project

Open the Xcode project then build. You will meet some error with the clean Xcode environment.

ldid2 error

After you build the project, you will meet a error. You will see this error:

At the first test, I tried install ldid original version by

brew install ldid

and the bin of the ldid would be at /usr/local/Cellar/ldid/1.2.1, then link it as ldid2 in /usr/local/bin

ln -s /usr/local/Cellar/ldid/1.2.1/bin/ldid /usr/local/bin/ldid2

With the ldid, it can work, and you can build the toolkit into your iPhone. However, the jailbreak won’t success and block on 2/3.

So I tried to find the solution on Github. I found xerub make a ldid2 with SHA256 support. However, this repo is not complete. The repo are lack of make code and wasn’t build.

Add ldid2 to /usr/local/bin/

I completed the ldid2 project and put the binary in release version page.
Project Link

curl https://raw.githubusercontent.com/GaryniL/ldid/master/ldid2 -o ldid2
sudo mv ldid2 /usr/local/bin/
chmod +x /usr/local/bin/ldid2

Then rebuild the project, it will work.

Remove Anemone

Besides, you can remove the line for preventing installing Anemone tweak

這篇文章 [Tutorial] How to build Electra ( iOS 11 Jailbreak app ) with ldid2 最早出現於 Gary's ...Lasamia。