![]() The Pangu program on the computer instructed the user to set the date and the time of the device way back to a date in 2014 (June 2, 2014, to be more specific). The application it installs, aptly called “Pangu”, is signed with an enterprise certificate which existed at that point and was a powerful thing but it wasn’t as easy to obtain on the black market as it is today (hence the advent of all these signing services like Ignition and AppValley). Pangu for iOS 7.1- 7.1.2 has its own Windows and macOS program that does the deployment for you. The astute can easily see that since this is talking about iOS 7.1.x, self-signing with provisioning profiles for free and deploying the signed IPAs was not a thing. If you still have an iPhone 4 just collecting dust around, chances are you are jailbroken with Pangu for iOS 7.1 - 7.1.2. Long before that was a thing, CodeSign was bypassed in very interesting ways by the highly skilled Jailbreak teams which are unfortunately long gone now. This self-signing with Provisioning Profiles was introduced to the masses by Apple by iOS 9.0 which is not even that far back in the jailbreak history. This may sound very trivial today because anybody has access to a free Apple Developer Account to sign an IPA file and install it on the device with Cydia Impactor or something akin to this, but it did not use to be this simple. Jailbreak History? Look no further than Pangu for iOS 7.x.xīefore anything can happen on the device, the jailbreak payload has to be somehow deployed to the device. So this way, the jailbreak tool has to know very well what kind of device it deals with. Normally, for these devices a KTRR bypass of sorts is required, as siguza has explained in his write-up aptly called KTRR. Yalu, however, supports iPhone 7 thanks to and his “KPPLess” aproach. In this case, a jailbreak containing only a KPP bypass (like Yalu) would not work on iPhone 7 and newer because KPP itself isn’t a thing there. For example, devices pre-iPhone 7 use KPP which is a software protection running in E元 (ARM Exception LEVEL 3), but the iPhone 7 and newer are using KTRR which is hardware-based. It used to be less reliant on the device type, but with the advent of KPP (Kernel Patch Protector) on iOS 9.0 and KTRR (allegedly Kernel Text Readonly Region) on iOS 10, that has become a thing more and more. The stages of a jailbreak differ depending on the iOS version and the device. So how does it work?īefore being able to open Cydia, Installer 5, Icy Project, or an SSH on the device, the jailbreak has to run. These jailbreaks are mostly destined for researchers and power users and not the random eta folk (who usually flames at the lack of Cydia). The same thing applies for LiberiOS by Jonathan Levin (iOS 11 to 11.1.2) which was maybe the most stable iOS 11 Jailbreak to date. ![]() So yes, my iOS 11.3.x/11.2.x Jailbreak, Osiris, released long before Electra was even a thing, was and is a jailbreak even though I never bundled any GUI installer (Cydia or such) with it. Cydia is just there to make this process as fool-proof as possible. Since Cydia relies on apt and dpkg (etc), you can simply use these binaries via SSH or through a mobile terminal application on the device. As the astute might have figured out, you don’t need Cydia to install packages. ![]() These packages follow a very strict (way too strict if you ask me) format that I will be discussing later. What differs is the target audience (or user).Ĭydia is a GUI (Graphical User Interface) application which uses dpkg and apt (amongst others) in the background to install. Cydia is a byproduct of the jailbreak “community” and a jailbreak is not considered a jailbreak just because it has Cydia, just like a jailbreak that lacks Cydia is still a jailbreak. No, Cydia has nothing to do with Jailbreaking itself. Breaking this Jail of restrictions is the scope of the entire Jailbreak Process. Applications and users are bound to use only what Apple provides which is a fraction of what the device is capable of. The nomenclature of the process likely comes from the Apple’s “Jailed” approach. This post is not all-encompassing and various jailbreak tools for various iOS versions may use different patches and techniques, but they do boil down mostly to what you are about to read. In this blog post, I am going to try to explain the main elements of a jailbreak as they were implemented and used historically. ![]() For a very long time, exactly what happened during the runtime of that application was largely unknown and even today as of iOS 11 (12 actually), the end-user (be that casual user, eta folk, reditter or nagger) remains largely oblivious about the processes going on. The Jailbreaking process has long been a mysterious process where the iOS system suddenly gets unlocked out of Apple’s shackles after running an application for a few seconds. ![]()
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