Resume on Reboot default implementation
A default implementation of the RebootEscrow HAL which relies on RAM
retention to keep a key around during a reboot to apply an OTA. This
should work on devices that use a "warm reboot" and most likely will
work on devices that use a "cold reboot" as well.
DRAM will retain information for several seconds depending on the
temperature and other factors. This is enough to survive a reboot. With
the Hadamard code used in this change for error recovery, many errors
can be recovered.
Bug: 63928581
Test: make
Test: atest VtsHalRebootEscrowTargetTest
Change-Id: Ib8db7888d64fee8d827d7c06892b9a1f2af87add
diff --git a/rebootescrow/aidl/default/rebootescrow-default.rc b/rebootescrow/aidl/default/rebootescrow-default.rc
new file mode 100644
index 0000000..e7a9cfc
--- /dev/null
+++ b/rebootescrow/aidl/default/rebootescrow-default.rc
@@ -0,0 +1,9 @@
+service vendor.rebootescrow-default /vendor/bin/hw/android.hardware.rebootescrow-service.default
+ interface aidl android.hardware.rebootescrow.IRebootEscrow/default
+ class hal
+ user system
+ group system
+
+on boot
+ chmod 770 /dev/access-kregistry
+ chown system system /dev/access-kregistry