ra1ncloud

ra1ncloud is a semi-untethered permasigned jailbreak for iOS 15.
It contains a code-signing bypass, kernel exploit, kernel PAC bypass and PPL bypass.
Additionally, it can be installed via Safari, i.e. a computer is not required, except for a Web Server that hosts ra1ncloud.
Please note that ra1ncloud does not support tweaks (no tweak injection library).

Tested Devices and iOS Versions

iPhone Xs Max: iOS 15.4.1
iPhone 11 (SRD): iOS 15.4.1
iPhone 12 (SRD): iOS 15.4.1
iPhone 12 Pro Max: iOS 15.4.1
iPhone 13: iOS 15.1 (offline edition - see bugs below [WiFi bug])

Other devices are probably supported as well. Some specific device & iOS combinations do not currently work. Non-arm64e devices are not supported.

Building

Prerequisites:

Make sure you have Xcode ~~13/14~~ 14.1 installed
Import the fastPath arm certificate (Exploits/fastPath/arm.pfx) into your Keychain (double click on the file). The password is "password" (without quotes)
You need a validly signed copy of Apple's Developer App from the AppStore (with DRM!). Copy the IPA to Server/orig.ipa. Note that if you would like to use a different AppStore App you will need to get it's Team ID and add TEAMID=<the App's Team ID> to all make commands

Now you can simply run make to build ra1ncloud (internet connection required to download dependencies).
Please note that you will be asked to grant "fastPathSign" access to the Keychain item "privateKey" (the private key of the fastPath certificate). Enter your password and select "Always allow".

Building Tools

Building ra1ncloud requires multiple Tools which can be found in the Tools directory. Building them is entirely optional because I've already compiled them.
If you want to build them yourself, simply run make in the Tools directory.

Installing

There are two ways to install ra1ncloud on your device: Via Safari or via USB

Installing via Safari

To install ra1ncloud via Safari, do the following (requires you to own a domain):

Make sure your device is connected to the same network as your computer
Change the DNS A record for a domain you own to the local IP-Address of your computer
Obtain a certificate for your domain (e.g. via Let's Encrypt) and copy it to Server/serverCert/fullchain.cer (the certificate itself) and Server/serverCert/server.key (private key)
Make sure you have Flask installed (pip3 install Flask)
Change serverUrl in Server/server.py to your domain
Run python3 server.py in the Server directory
Visit https://<your domain> on your iPhone and follow the instructions

Installing via USB

Install ra1ncloud_Developer.ipa, e.g. via ideviceinstaller -i ra1ncloud_Developer.ipa. Alternatively, install ra1ncloud/ra1ncloud.ipa via TrollStore.
Open the newly installed "Developer" App (or whatever AppStore App you used) on your iPhone

iDownload

Like all Fugu jailbreaks, ra1ncloud ships with iDownload. The iDownload shell can be accessed on port 1337 (run iproxy 1337 1337 & and then nc 127.1 1337 to connect to iDownload).
Type help to see a list of supported commands.
The following commands are especially useful:

r64/r32/r16/r8 <address>: Read a 64/32/16/8 bit integer at the given kernel address. Add the @S suffix to slide the given address or @P to read from a physical address.
w64/w32/w16/w8 <address> <value>: Write the given 64/32/16/8 bit integer to the given kernel address. Also supports the suffixes described above and additionally @PPL to write to a PPL protected address (see krwhelp).
kcall <address> <up to 8 arguments>: Call the kernel function at the given address, passing up to 8 64-Bit integer arguments.
tc: Load a TrustCache
tcload: Load a TrustCache and exit

Procursus Bootstrap and Sileo

ra1ncloud also ships with the procursus bootstrap and Sileo. Run the bootstrap command in iDownload to install both. Afterwards, you might have to respring to force Sileo to show up on the Home Screen (uicache -r).

Procursus is installed into the /private/preboot/<uuid>/jb directory and /var/jb is a symlink to it.

Known Issues/Bugs

If oobPCI (the process exploiting the kernel) exits, the system might be left in an inconsistent state and panic at some point. This usually occurs about 5 seconds after running the exit_full command in iDownload.
Workaround: Don't quit oobPCI or make sure to do it as fast as possible to reduce the chance of a kernel panic. The reason for this panic is currently unknown.
Some iOS versions (at least iOS 15.1 and below, maybe 15.2 and 15.3 too) have a DriverKit bug which causes bus mastering to be disabled for the WiFi chip when running oobPCI, causing a kernel panic when WiFi is used. This bug can be fixed but a fix is not included in ra1ncloud at the moment.
Workaround: Disable WiFi.

FAQ

Q: I'm an end user. Is ra1ncloud useful to me?
A: Maybe, if running getting an easy to use terminal environment and some apps on your device is what you're looking for.

Q: My iOS version/device is not supported by ra1ncloud, will you add support for it?
A: No.

Q: Will you ever add support for tweak injection?
A: Hopefully. No guarantees on this.

Q: I installed/updated something through dpkg/apt but it won't launch. How can I fix that?
A: ra1ncloud uses TrustCache injection to bypass code signing. Therefore, if you install or update something, it's code signature must be in the TrustCache. You can regenerate the TrustCache from your favorite shell via the trustcache command.

Credits

The following open-source software is used by ra1ncloud:

Procursus Bootstrap: The bootstrap used by ra1ncloud. License: BSD 0-Clause. The tools included in the bootstrap are released under many different licenses, please see the procursus repo for more information
Sileo: The package manager included in ra1ncloud. License: BSD 4-Clause
ZIPFoundation: Swift library for working with ZIP archives. Used in installer to install the ra1ncloud App. License: MIT
opa334 Fugu15 fork: PoC tweak injection code used in this fork of Fugu15. License: MIT

License

MIT License. See the LICENSE file.

iarchiveml/ra1ncloud