/usr/share/vboot/devkeys/key.versions is in vboot-kernel-utils 0~20121212-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | firmware_key_version=1
firmware_version=1
kernel_key_version=1
kernel_version=1
|