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How to test a new shim build for RHEL/fedora:
1) build pesign-test-app, and sign it with the appropriate key
2) build shim with the appropriate key built in
3) install pesign-test-app and shim-unsigned on the test machine
4) make a lockdown.efi for "Red Hat Test Certificate" and put it in \EFI\test
mkdir /boot/efi/EFI/test/
wget http://pjones.fedorapeople.org/shim/LockDown-rhtest.efi
mv LockDown-rhtest.efi /boot/efi/EFI/test/lockdown.efi
5) sign shim with RHTC and put it in \EFI\test:
pesign -i /usr/share/shim/shim.efi -o /boot/efi/EFI/test/shim.efi \
-s -c "Red Hat Test Certificate"
6) put pesign-test-app-signed.efi in \EFI\test as grubx64.efi
cp /usr/share/pesign-test-app-0.4/pesign-test-app-signed.efi \
/boot/efi/EFI/test/grubx64.efi
7) sign a copy of grubx64.efi with RHTC and iput it in \EFI\test\ . Also
leave an unsigned copy there:
pesign -i /boot/efi/EFI/redhat/grubx64.efi \
-o /boot/efi/EFI/test/grubx64-unsigned.efi \
-r -u 0
pesign -i /boot/efi/EFI/test/grubx64-unsigned.efi \
-o /boot/efi/EFI/test/grub.efi \
-s -c "Red Hat Test Certificate"
8) sign a copy of mokmanager with RHTC and put it in \EFI\test:
pesign -i /usr/share/shim/MokManager.efi \
-o /boot/efi/EFI/test/MokManager.efi -s \
-c "Red Hat Test Certificate"
9) copy grub.cfg to our test directory:
cp /boot/efi/EFI/redhat/grub.cfg /boot/efi/EFI/test/grub.cfg
10) *move* \EFI\redhat\BOOT.CSV to \EFI\test
rm -rf /boot/efi/EFI/BOOT/
mkdir /boot/efi/EFI/BOOT/
mv /boot/efi/EFI/redhat/BOOT.CSV /boot/efi/EFI/test/BOOT.CSV
11) sign a copy of fallback.efi and put it in \EFI\BOOT\fallback.efi
pesign -i /usr/share/shim/fallback.efi \
-o /boot/efi/EFI/BOOT/fallback.efi \
-s -c "Red Hat Test Certificate"
12) put shim.efi there as well
cp /boot/efi/EFI/test/shim.efi /boot/efi/EFI/BOOT/BOOTX64.EFI
13) enroll the current kernel's certificate with mokutil:
# this should be a /different/ cert than the one signing pesign-test-app.
# for instance use a RHEL cert for p-t-a and a fedora cert+kernel here.
mokutil --import ~/fedora-ca.cer
14) put machine in setup mode
15) boot to the UEFI shell
16) run lockdown.efi from #4:
fs0:\EFI\test\lockdown.efi
17) enable secure boot verification
18) verify it can't run other binaries:
fs0:\EFI\test\grubx64.efi
result should be an error, probably similar to:
"fs0:\...\grubx64.efi is not recognized as an internal or external command"
19) in the EFI shell, run fs0:\EFI\test\shim.efi
20) you should see MokManager. Enroll the certificate you added in #13, and
the system will reboot.
21) reboot to the UEFI shell and run fs0:\EFI\test\shim.efi
result: "This is a test application that should be completely safe."
If you get the expected result, shim can run things signed by its internal
key ring. Check a box someplace that says it can do that.
22) from the EFI shell, copy grub to grubx64.efi:
cp \EFI\test\grub.efi \EFI\test\grubx64.efi
23) in the EFI shell, run fs0:\EFI\test\shim.efi
result: this should start grub, which will let you boot a kernel
If grub starts, it means shim can run things signed by a key in the system's
db. Check a box someplace that says it can do that.
If the kernel boots, it means shim can run things from Mok. Check a box
someplace that says it can do that.
24) remove all boot entries and the BootOrder variable:
[root@uefi ~]# cd /sys/firmware/efi/efivars/
[root@uefi efivars]# rm -vf Boot[0123456789]* BootOrder-*
removed ‘Boot0000-8be4df61-93ca-11d2-aa0d-00e098032b8c’
removed ‘Boot0001-8be4df61-93ca-11d2-aa0d-00e098032b8c’
removed ‘Boot0002-8be4df61-93ca-11d2-aa0d-00e098032b8c’
removed ‘Boot2001-8be4df61-93ca-11d2-aa0d-00e098032b8c’
removed ‘BootOrder-8be4df61-93ca-11d2-aa0d-00e098032b8c’
[root@uefi efivars]#
25) reboot
26) the system should run \EFI\BOOT\BOOTX64.EFI . If it doesn't, you may just
have an old machine. In that case, go to the EFI shell and run:
fs0:\EFI\BOOT\BOOTX64.EFI
If this works, you should see a bit of output very quickly and then the same
thing as #24. This means shim recognized it was in \EFI\BOOT and ran
fallback.efi, which worked.
27) copy the unsigned grub into place and reboot:
cp /boot/efi/EFI/test/grubx64-unsigned.efi /boot/efi/EFI/test/grubx64.efi
28) reboot again.
result: shim should refuse to load grub.
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