wow, well done sephail
i think you are the 1st person that can source, decrypt and provide software like this.
Shame samsung has forced us to look for a back door but what option has the idiots left us with
c) A large potential exists for abuse, which might prompt Samsung to change the way their clients request upgrades to something that is potentially much more secure (i.e., bad for us).
So far i've extracted the cache.img and put it in it's own tar file. I have then gone and loaded Odin and then selected the OPS file. Next I have then selected the CSC file pointing it at my cache.tar. I then set my phone up into download mode and connect it to my computer and see that Odin recognizes it. I click start and it says "Check Image Files". Am I missing a step?
As an alternative method you could try using the modified recovery image to apply the CSC. You need to extract the zip from the image though. That can be done with unyaffs: unyaffs - Project Hosting on Google Code
The resulting .zip is a valid OTA and can be applied as update.zip from the recovery menu.
As an alternative method you could try using the modified recovery image to apply the CSC. You need to extract the zip from the image though. That can be done with unyaffs: unyaffs - Project Hosting on Google Code
The resulting .zip is a valid OTA and can be applied as update.zip from the recovery menu.
I haven't tried it, but i don't see any other reason why it wouldn't work than the signature within the zip file. If the recovery image doesn't know the signature, it might not allow the update to proceed.
Other than that, the zip file is the same as the update.zip file, including a valid update script within the package.
So you need to sign the package with SignApk before applying the update. Other than that, it's a working OTA.
So, to recap: extract cache.img from the tar, unyaffs the img to get the zip and pass the zip through SignApk, apply as an OTA through the modified recovery, profit!
Remember to wipe your system after applying, the CSC update screws up your system pretty bad (it's the same as seen when upgrading from G-series to H-series)
And now to restore the backup and return to a CSC free life
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