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Unia

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From: Stockholm, Sweden

Registered: 2010-03-30

Posts: 2,486

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Booting with Secure Boot enabled

Hey all,

I'm trying to get to boot my laptop with secure boot enabled. After having run without it ever since I switched to UEFI, I noticed it is now relatively easy to switch, so I decided to give it a shot. I enabled Secure Boot again, booted the Arch Linux install image from USB and was indeed met with this warning message. I followed the steps outlined there and the system booted fine, after which I proceeded to install everything the usual way.

While in the chroot, I installed prebootloader as required. I then followed the steps outlined in this Reddit post, after having confirmed with Head_on_a_Stick on the Crunchbang Linux forums that these instructions are correct. In my search, I also found another webpage with the same instructions, albeit looking a bit more professional.

I followed the instructions outlined in both websites:

# cd /boot/EFI/systemd/
# cp /usr/lib/prebootloader/* .
# mv systemd-bootx64.efi loader.efi
# efibootmgr -c -d /dev/sda -p 1 -l /EFI/systemd/PreLoader.efi -L "PreLoader"

I confirmed that the new entry was indeed there, and set it as next boot option:

# efibootmgr 
BootCurrent: 000C
Timeout: 0 seconds
BootOrder: 000C,000F,000A,0006,0007,0008,0009,000B
Boot0000  Setup
Boot0001  Boot Menu
Boot0002  Diagnostic Splash Screen
Boot0003  Lenovo Diagnostics
Boot0004  Rescue and Recovery
Boot0005  Startup Interrupt Menu
Boot0006* USB CD
Boot0007* USB FDD
Boot0008* ATA HDD0
Boot0009* ATA HDD1
Boot000A* USB HDD
Boot000B* PCI LAN
Boot000C* Preloader
Boot000F* Linux Boot Manager

After this, I restarted my laptop and was greeted with a warning saying "Image failed to verify with *ACCESS DENIED*. Press any key to continue.". This time, however, unlike with the Arch installation image, I was not presented with a menu to launch HashTool in order to enroll a hash: it skips straight to the usual bootloader menu, giving me my usual three options: Arch Linux, Default EFI or reboot into firmware. When I select Arch Linux, I get the same warning again after which my laptop proceeds to boot normally.

I can not figure out why I am not presented with the option to enroll a new hash. As you can see, my Preloader entry is set as the first in the boot order and my current boot is via the Preloader entry. I tried the whole setup again, thinking I did something wrong, but the outcome is exactly the same.

EDIT: Here is the output of bootctl:

# bootctl status
System:
     Firmware: UEFI 2.31 (Phoenix Technologies Ltd. 4660.22136)
  Secure Boot: enabled
   Setup Mode: user

Loader:
      Product: systemd-boot 226
    Partition: /dev/disk/by-partuuid/903a6edd-74b5-4061-b2d3-5cf33a7092fb
         File: └─/EFI/systemd/loader.efi

Boot Loader Binaries:
          ESP: /dev/disk/by-partuuid/903a6edd-74b5-4061-b2d3-5cf33a7092fb
         File: └─/EFI/systemd/HashTool.efi
         File: └─/EFI/systemd/KeyTool.efi
         File: └─/EFI/systemd/PreLoader.efi
         File: └─/EFI/systemd/loader.efi (systemd-boot 226)
         File: └─/EFI/Boot/BOOTX64.EFI (systemd-boot 226)

Boot Loader Entries in EFI Variables:
        Title: Preloader
           ID: 0x000C
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/903a6edd-74b5-4061-b2d3-5cf33a7092fb
         File: └─/EFI/systemd/PreLoader.efi

        Title: Linux Boot Manager
           ID: 0x000F
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/903a6edd-74b5-4061-b2d3-5cf33a7092fb
         File: └─/EFI/systemd/systemd-bootx64.efi

Can someone here point me towards some instructions, or tell me what I did wrong? In case it matters, the laptop I'm using is a Lenovo Thinkpad Edge E130. The second page with instructions I linked to mentions that Lenovo laptops refuse to boot when the entries aren't named after Microsoft or RedHat, but I don't think that is happening here considering my laptop does boot. Perhaps it is another Lenovo quirk I'm experiencing; I have no clue.

Thanks in advance!

Last edited by Unia (2015-09-21 15:55:20)

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If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,289

Website

Re: Booting with Secure Boot enabled

Well, according to the `bootctl` output, you *are* booted with Secure Boot enabled.

The only difference in my system is the existence of an NVRAM entry for the HashTool:

# efibootmgr -d /dev/sda -p 1 -c -L "HashTool" -l /EFI/systemd/HashTool.efi

With the boot order set to Preloader, then HashTool then systemd-boot ("Linux Boot Manager"):

empty@Arch ~ % efibootmgr
BootCurrent: 0007
Timeout: 0 seconds
BootOrder: 0007,0008,0006,0009,0000
Boot0000* USB Stick
Boot0006* Linux Boot Manager
Boot0007* PreLoader
Boot0008* HashTool
Boot0009* UEFI OS

With this set up, the Prebootloader screen showed up first boot and I enrolled prebootloader.efi, hashtool.efi, loader.efi, $ESP/EFI/Boot/Bootx64.efi and the kernel image & initramfs (better safe than sorry).

My system now boots without errors:

empty@Arch ~ % sudo bootctl status
System:
     Firmware: UEFI 2.31 (American Megatrends 4.654)
  Secure Boot: enabled
   Setup Mode: user

Loader:
      Product: systemd-boot 226
    Partition: /dev/disk/by-partuuid/53aa6ebb-7a0a-4053-82cf-ce09029de47e
         File: └─/EFI/systemd/loader.efi

Boot Loader Binaries:
          ESP: /dev/disk/by-partuuid/53aa6ebb-7a0a-4053-82cf-ce09029de47e
         File: └─/EFI/systemd/HashTool.efi
         File: └─/EFI/systemd/systemd-bootx64.efi (systemd-boot 226)
         File: └─/EFI/systemd/KeyTool.efi
         File: └─/EFI/systemd/PreLoader.efi
         File: └─/EFI/systemd/loader.efi (systemd-boot 226)
         File: └─/EFI/Boot/BOOTX64.EFI (systemd-boot 226)

Boot Loader Entries in EFI Variables:
        Title: PreLoader
           ID: 0x0007
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/53aa6ebb-7a0a-4053-82cf-ce09029de47e
         File: └─/EFI/systemd/Preloader.efi

        Title: HashTool
           ID: 0x0008
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/53aa6ebb-7a0a-4053-82cf-ce09029de47e
         File: └─/EFI/systemd/HashTool.efi

        Title: Linux Boot Manager
           ID: 0x0006
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/53aa6ebb-7a0a-4053-82cf-ce09029de47e
         File: └─/EFI/systemd/systemd-bootx64.efi

        Title: UEFI OS
           ID: 0x0009
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/53aa6ebb-7a0a-4053-82cf-ce09029de47e
         File: └─/EFI/BOOT/BOOTX64.EFI

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Para todos todo, para nosotros nada

Unia

Member

From: Stockholm, Sweden

Registered: 2010-03-30

Posts: 2,486

Website

Re: Booting with Secure Boot enabled

Adding an entry for HashTool does sadly not resolve my issue:

# efibootmgr
BootCurrent: 000C
Timeout: 0 seconds
BootOrder: 000C,000D,000F
Boot0000  Setup
Boot0001  Boot Menu
Boot0002  Diagnostic Splash Screen
Boot0003  Lenovo Diagnostics
Boot0004  Rescue and Recovery
Boot0005  Startup Interrupt Menu
Boot0006* USB CD
Boot0007* USB FDD
Boot0008* ATA HDD0
Boot0009* ATA HDD1
Boot000A* USB HDD
Boot000B* PCI LAN
Boot000C* Preloader
Boot000D* HashTool
Boot000F* Linux Boot Manager

# bootctl status
System:
     Firmware: UEFI 2.31 (Phoenix Technologies Ltd. 4660.22136)
  Secure Boot: enabled
   Setup Mode: user

Loader:
      Product: systemd-boot 226
    Partition: /dev/disk/by-partuuid/903a6edd-74b5-4061-b2d3-5cf33a7092fb
         File: └─/EFI/systemd/loader.efi

Boot Loader Binaries:
          ESP: /dev/disk/by-partuuid/903a6edd-74b5-4061-b2d3-5cf33a7092fb
         File: └─/EFI/systemd/HashTool.efi
         File: └─/EFI/systemd/KeyTool.efi
         File: └─/EFI/systemd/PreLoader.efi
         File: └─/EFI/systemd/loader.efi (systemd-boot 226)
         File: └─/EFI/Boot/BOOTX64.EFI (systemd-boot 226)

Boot Loader Entries in EFI Variables:
        Title: Preloader
           ID: 0x000C
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/903a6edd-74b5-4061-b2d3-5cf33a7092fb
         File: └─/EFI/systemd/PreLoader.efi

        Title: HashTool
           ID: 0x000D
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/903a6edd-74b5-4061-b2d3-5cf33a7092fb
         File: └─/EFI/systemd/HashTool.efi

        Title: Linux Boot Manager
           ID: 0x000F
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/903a6edd-74b5-4061-b2d3-5cf33a7092fb
         File: └─/EFI/systemd/systemd-bootx64.efi

Maybe I should try booting directly into HashTool? Or perhaps there is an equivalent to an executable bit on the ESP partition that isn't set? My `ls` output shows nothing strange:

# ls -l /boot/EFI/systemd/
total 408
-rwxr-xr-x 1 root root 100656 21.09.2015 16:59 HashTool.efi
-rwxr-xr-x 1 root root 130057 21.09.2015 16:59 KeyTool.efi
-rwxr-xr-x 1 root root 101160 21.09.2015 16:59 PreLoader.efi
-rwxr-xr-x 1 root root  80142 08.09.2015 19:57 loader.efi

Also, HoaS, have you noticed the File entries in our `bootctl` outputs are different? (E.g. `PreLoader` in mine versus `Preloader` in yours)

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If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

Unia

Member

From: Stockholm, Sweden

Registered: 2010-03-30

Posts: 2,486

Website

Re: Booting with Secure Boot enabled

After upgrading to linux 4.2 yesterday, I had to rehash vmlinuz-linux. This time I did get the HashTool prompt and signed vmlinuz-linux, HashTool, KeyTool, PreLoader and loader. However, I am still getting the warning saying "Image failed to verify with *ACCESS DENIED*. Press any key to continue.".

Seems like it is not related to things being signed or unsigned... what else can it be?

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If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,289

Website

Re: Booting with Secure Boot enabled

I had a kernel update yesterday and I had to enrol the new kernel image using the Preloader (it loaded automatically) then it continued to boot without error.

OTOH, I tried to enable Secure Boot on my other laptop and it wouldn't work at all (the Preloader showed and enrolled the hashes but the system wouldn't boot).

I think we have to put this down to buggy & inconsistent firmware implementation.

AFAICT, your system seems to be booting with Secure Boot enabled so you may just have to ignore the error message.

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Para todos todo, para nosotros nada

Unia

Member

From: Stockholm, Sweden

Registered: 2010-03-30

Posts: 2,486

Website

Re: Booting with Secure Boot enabled

I think we have to put this down to buggy & inconsistent firmware implementation.

I think that is a reasonable assumption to make. I just checked my BIOS settings again and found nothing out of the ordinary. I guess I'll have to live with those two warnings and no automatic boot

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If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

damjan

Member

Registered: 2006-05-30

Posts: 454

Re: Booting with Secure Boot enabled

I use a combined efi stub, kernel and initramfs, combined in a single file, which is then signed with my key.
This is the makefile and some explanation I used:

https://gist.github.com/gdamjan/4a5a30be9a0d8faf1dc7

Unia

Member

From: Stockholm, Sweden

Registered: 2010-03-30

Posts: 2,486

Website

Re: Booting with Secure Boot enabled

Thanks for the tip, but I have reverted to booting without secure boot enabled.

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If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,289

Website

Re: Booting with Secure Boot enabled

Bumping this topic to add a little more:

I have found that using the default UEFI loader location for {PreLoader,HashTool}.efi & loader.efi removes the need for a custom NVRAM entry to boot PreLoader.efi

More here:
https://wiki.archlinux.org/index.php/Un … led_system

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Para todos todo, para nosotros nada

MarcusMoeller

Member

Registered: 2012-05-29

Posts: 6

Re: Booting with Secure Boot enabled

I have the same issue on Lenovo X1 Carbon 2nd gen. I also think it's a bug in the UEFI implementation but sadly no new BIOS update is available for this model.