USB Autorun

This feature can be used to automatically launch a shell script or perform a software/config update as soon as an USB storage stick has been plugged in. For authentication, a file called autorun.key must exist in the root directory of a FAT16/32 formatted stick. It can be downloaded from that page and holds the SHA256 hash key of the admin password. The file can hold multiple hashes which will be processed line-by-line during authentication which can be used for setting up more systems with different admin passwords. For new devices with an empty password the hash key e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 can be used. The hash keys can be generated by running the command echo -n “<admin-password>” | sha256sum on a Linux system or an Internet hash key generator (search for “sha-256 hash calculator”). Once authentication has succeeded, the system scans for other files in the root directory which can perform the following actions:

1. For a configuration update: cfg-<SERIALNO>.zip (e.g. cfg-00112B000815.zip), or if not available cfg.zip
2. For a software update: sw-update.img
3. For running a script: autorun.sh

autorun.key

# corresponds to password in factory defaults
# as of release 3.8 the password in factory default is an empty string hence the hash is ''echo -n "" | sha256sum''
d6414f06abe9d25df078def16971fc48a0c18fb5da799c141cc8c555683467a7
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855