Originally Posted by kgs1992

If the bootloader is unlocked, yes, else no. PG58IMG's cannot be made to pass the signature check.

And this is exactly why ordinary update files aren't PG58IMG.zip files.

Originally Posted by kgs1992

If you want to S Off, then follow this guide & then this guide.
And if you want to remain S On, then this guide should help you

• this member is talking about HTC Desire S
• this is sensation section , Joeperttt go to HTC Desire S section for answers here http://forum.xda-developers.com/forumdisplay.php?f=1030

Originally Posted by SanityPreservation

Would it be possible to create an OTA-update.zip file that emulates a real OTA update and include a WiFi fix in it so people do not have to root their phones to solve the post ICS update WiFi problem ?

• if you mean something like RUU.exe " i.e System.img ... etc" , up to my knowledge i guess this can't be done because it " System.img " don't include an updater-script , so this can't be cocked by Android kitchen , Read this post.

Originally Posted by trkaaa

• this member is talking about HTC Desire S
• this is sensation section , Joeperttt go to HTC Desire S section for answers here http://forum.xda-developers.com/forumdisplay.php?f=1030

Originally Posted by SanityPreservation

Would it be possible to create an OTA-update.zip file that emulates a real OTA update and include a WiFi fix in it so people do not have to root their phones to solve the post ICS update WiFi problem ?

• if you mean something like RUU.exe " i.e System.img ... etc" , up to my knowledge i guess this can't be done because it " System.img " don't include an updater-script , so this can't be cocked by Android kitchen , Read this post.

Kind of, but run from stock recovery as normal OTA_update.zip files are.

OK, checked your link. Thanks

I am still not fully satisfied though
OTA update files do have updater-scripts ?

Originally Posted by SanityPreservation

And this is exactly why ordinary update files aren't PG58IMG.zip files.

Effectively every zip that is flashed from fastboot is a PG58IMG or similar to it except, this is done in RUU mode.
Now, if HTC signs the update, the signature check is passed. If not, or if the file is altered, then it is not possible unless bootloader is unlocked (& S Off may also be required for flashing certain partitions).
That is how I've come to understand it. I maybe wrong, but I tried helping.
Sorry.

Originally Posted by kgs1992

Effectively every zip that is flashed from fastboot is a PG58IMG or similar to it except, this is done in RUU mode.
Now, if HTC signs the update, the signature check is passed. If not, or if the file is altered, then it is not possible unless bootloader is unlocked (& S Off may also be required for flashing certain partitions).
That is to my understanding. I maybe wrong, but I tried helping.
Sorry.

Thanks, I appreciate it.

I was thinking of non-rooted users getting a "normal" OTA update, they aren't S-OFF. So they depend on the proper signatures, correct ?

So the problem is signing the "selfmade" OTA file properly ?

Originally Posted by SanityPreservation

Kind of, but run from stock recovery as normal OTA_update.zip files are.

OK, checked your link. Thanks

I am still not fully satisfied though
OTA update files do have update scripts ?

OTA zips are signed by HTC additionally to all the.img signatures. Once you tamper with zip, sig is broken.

What exactly do you mean by update scripts?


Sent from my HTC Sensation XE with Beats Audio using xda premium

Originally Posted by SanityPreservation

Thanks, I appreciate it.

I was thinking of non-rooted users getting a "normal" OTA update, they aren't S-OFF. So they depend on the proper signatures, correct ?

So the problem is signing the "selfmade" OTA file properly ?

Yes, and that is exactly what I was trying to explain.
But definitely, I'm not entirely correct. trkaaa knows way better.

Originally Posted by tinky1

OTA zips are signed by HTC additionally to all the.img signatures. Once you tamper with zip, sig is broken.

What exactly do you mean by update scripts?


Sent from my HTC Sensation XE with Beats Audio using xda premium

That should read "updater-script".

Originally Posted by tinky1

OTA zips are signed by HTC additionally to all the.img signatures. Once you tamper with zip, sig is broken.

What exactly do you mean by update scripts?

Sent from my HTC Sensation XE with Beats Audio using xda premium

• update-script is a universal format fits all , new devices like ours use updater-script , The updateR-script is more advanced than the update-script and supports more devices
• Unlike the update-script, the updater-script is supported in newer versions of ClockworkMod Recovery " i.e zips can be flashed through recovery without giving error "
• it is carried out once only when flashing the Custom Rom for the first time
• This is a file found under the META-INF/com/google/android folder,
• it specifies the operations required for flashing your ROM. It performs various file operations, such as creating file shortcuts (also known as symlinks or symbolic links), adding permissions to files, running scripts and copying files and folders. After flashing your ROM this file is not executed again.
• The updateR-script also requires an update-binary file included with it. The update-binary contains all the binaries for the commands that the updater-script uses (e.g. set_perm, symlink, format, mount, etc.). The update-script does not need an update-binary.
• if you want to know more about things like this , go to Android kitchen http://forum.xda-developers.com/showthread.php?t=633246

Thanks trkaaa

Well, that means you can't use it with ota because of signature.
What can be done, is if you are unlocked, make ota into flashable zip with updater- script included.

Sent from my HTC Sensation XE with Beats Audio using xda premium