Android/Security
Firmware security for the Android and Sugar build.
- set up for signing using firmware security and the bios-crypto source,
- copy /boot/alt/vmlinuz and /boot/alt/initrd.img from the Android build,
- sign the Android kernel with the deployment operating system (o1) private key:
sign-os.sh os vmlinuz runos4.zip
- purpose: firmware will check signature using public key (o1) stored in manufacturing data.
- sign the Android ramdisk with the deployment operating system (o1) private key:
sign-os.sh os initrd.img runrd4.zip
- purpose: firmware will check signature using public key (o1) stored in manufacturing data.
- place both files in in /boot/alt,
- purpose: firmware will load these files when O game key is used.
- link the activation mode to the Sugar activation kernel and ramdisk:
ln -s ../runos4.zip actos4.zip ln -s ../actrd4.zip actrd4.zip
- purpose: for laptops with expired or missing activation lease, the supplied actrd4.zip must obtain a lease, write it to /security/lease.sig on the first partition, then reboot.
- or, for laptops that are never assigned activation leases, link actos4.zip to the Android runos4.zip, and link actrd4.zip to the Android runrd4.zip, and the firmware will boot Android without obtaining a lease:
ln -s runos4.zip actos4.zip ln -s runrd4.zip actrd4.zip
- or, for laptops preactivated with the ak tag, no action is needed, because actrd4.zip is not used.
- sign the Q7B40 firmware release with the deployment firmware (w1) key, and copy the signed bootfw4.zip file to /boot/
- purpose: older firmware will check signature using public key (w1) stored in manufacturing data, and automatically reflash to Q7B40 if necessary.
- test booting using the O game key to select Android, or no O game key to select Sugar, using the X game key to enable security if it is not enabled,
- test booting using the rocker down key to display the boot menu.
