Relock Bootloader and restore DRM keys? - Xperia Z3 Compact Q&A, Help & Troubleshooting

Hi to everyone i need tutorial for how to relock bootloader and restore DRM key (i have previously backuped it). Actually my z3c run 6.0.1 stock ROM. thx

after 3.5 years, i'm currently looking for the same thing

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[Q] Rooting/unlocking

So I've got myself a Sony Xperia Z1 and I'm a little unsure about how you root it.
From my understanding you need root to backup the DRM keys. but to get root apparently I need to unlock the bootloader to be able to put a certain version of the ROM on (which wipes the DRM keys).
Then I can root the phone.
Then I can backup the DRM keys
I'm seeing a loop here and I'm not sure what the first step would be. if anyone could point me in the right direction it would be heavily appreciated.
Hunter-Nyan said:
So I've got myself a Sony Xperia Z1 and I'm a little unsure about how you root it.
From my understanding you need root to backup the DRM keys. but to get root apparently I need to unlock the bootloader to be able to put a certain version of the ROM on (which wipes the DRM keys).
Then I can root the phone.
Then I can backup the DRM keys
I'm seeing a loop here and I'm not sure what the first step would be. if anyone could point me in the right direction it would be heavily appreciated.
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Click to collapse
You do not need to backup the TA area (Which contains the DRM keys) if you just want to root. you only need to do that if you unlock the bootloader.
First, read this about unlocking the bootloader
http://unlockbootloader.sonymobile.com/
If you can and you want to unlock the bootloader then do so, making sure you have backed up your TA
If you cant (And in any case you must do this in order to backup your TA) you must
1) Downgrade to 4.2
2) Root using Bin4rys method, google it
3) Install dual recovery for 4.2, Its in the development thread
4) Flash a prerooted 4.4 Rom, in the development section.
If you still want to unlock the bootloader, backup the TA

Intact DRM Keys?

Hey all,
I just bought a used Z3+ and was wondering if someone could look at the following screenshot and tell me if my DRM keys are 100% intact and my bootloader has never been unlocked. I'm having a hard time figuring it out because after the first three, all other screenshots I've found have more [Key Ok] [Active] things than mine does. but, they are also for other phones. I'm used to phones without DRM, so I want to make sure I've got everything as intended. Can anyone compare to their Z3+ who may have never unlocked it and see what they think?
Thanks for any help you can provide!
i am 100% sure your DRM key is working
Right now z3+ don't has ROOT without unlock Boot loader
That mean it can't backup TA partition and can't restore DRM key
So this phone NEVER unlock Boot loader.
tommy1177 said:
i am 100% sure your DRM key is working
Right now z3+ don't has ROOT without unlock Boot loader
That mean it can't backup TA partition and can't restore DRM key
So this phone NEVER unlock Boot loader.
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Click to collapse
Got unlocked bootloader without possible root (5.0.2 28.0.A.8.266 firmware E6533 (z3+ Dual)). Used flashtool before unlock and saved S1 Dump in Advanced menu. Is it possible to get DRM keys from S1 Dump and restore bootloader lock?
Or my DRM keys now lost... ?

How to root Xperia Z4/Z3+? [Marshmallow]

I just received a Sony Xperia Z3+(E6533) on stock Marshmallow 6.0 and I've looked up how to root but only got ways to root while it's on Lollipop. Is there anyway for me to root on this software or downgrade from Marshmallow to Lollipop on this phone?
You can also root your phone while on MM. You can unlock the bootloader, flash a rootable kernel followed by a recovery and than flash the SuperSu zip. No problem.
But it is not recommended to do so, because you will loose the DRM keys/functionality when unlocking the bootloader. And once the keys are gone there is no way to get them back.
The better way is to downgrade to LP (e.g. .266), backup the DRM keys (TA Backup) and proceed with unlocking the bootloader and rooting the phone.
That's also the way I did yesterday, when I got the Z3+.
And of course you will have to read... a lot...
Thanks for the heads up , I've been trying to figure out ways for my specific model all morning and last night.
So to downgrade I'll just unlock the bootloader first then get a Lollipop firmware and flash using flash tool then do the other steps such as getting a rootable kernel and so on?
No, that is not what I wrote. Before unlocking the bootloader you will have to flash a LP firmware assumed that you want to backup the TA partition with the DRM keys first. This can only be done under LP.
I think you will have to read a little bit:
How to root Xperia Z3+?!
iovyroot - (temp) root tool
[Rootable Kernel SXZ3+ IVY/IVY_DSDS Marshsmellow ] [32.1.A.1.163]
What are the issues if we loose Drm keys? Will it affect non DRM normal contents? Or will it altogether disable Netflix or any other apps using Drm or other encryption?
You may have a look here:
Loss of DRM Keys or
Unlock your boot loader (Risk section)
Why don't create a guide?
Do some readings

Unlocked Bootloader and restored DRM keys not possible?

So i read that restoring the DRM keys using Backup-TA will relock the bootloader if it was unlocked.
And unlocking the bootloaded deletes them again.
So just for confirmation: Is it not possible to have restored DRM keys and an unlocked bootloader?
Following that: Can i unlock the bootloader, flash a custom Rom, restore the DRM keys and have a custom rom + the camera algorithms? (and a locked bootloader)
Matombo said:
So i read that restoring the DRM keys using Backup-TA will relock the bootloader if it was unlocked.
And unlocking the bootloaded deletes them again.
So just for confirmation: Is it not possible to have restored DRM keys and an unlocked bootloader?
Following that: Can i unlock the bootloader, flash a custom Rom, restore the DRM keys and have a custom rom + the camera algorithms? (and a locked bootloader)
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No but most AOSP ROMs have now the camera as is in stock so there shouldn't be a difference,but as for stock ROM there is a DRM fix you can flash just search it up on XDA.

Relocking bootloader

Hi there everyone, i would like to get my phone to the brand new state. Currently it has unlocked bootloader, latest stock firmware and it is rooted. I also have a backup image of TA partition(BL Locked). Do i need to do anything else than flashing stock firmware and TA partition to preseve all the fuctionality (especially fully working camera)? Will it be possible to unlock the bootloader once again in the future after performing this?
maciek12 said:
Hi there everyone, i would like to get my phone to the brand new state. Currently it has unlocked bootloader, latest stock firmware and it is rooted. I also have a backup image of TA partition(BL Locked). Do i need to do anything else than flashing stock firmware and TA partition to preseve all the fuctionality (especially fully working camera)? Will it be possible to unlock the bootloader once again in the future after performing this?
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Restoring the TA restores DRM functions, it doesn't relock the BL, which you can't, hence why there are no threads relating to locking the BL of the XZ1 Compact.
SXUsr said:
Restoring the TA restores DRM functions, it doesn't relock the BL, which you can't, hence why there are no threads relating to locking the BL of the XZ1 Compact.
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Thanks. It’s a shame though

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