systemrescue: secondary mode with "rootpass=MAC_ADDR"

[lars18th]

Hi,

The current asset of the System Rescue CD works nice. However, to enable the remote SSH access you need to change the password. For this reason this distro has a boot command argument to set the password. You can check it:
https://www.system-rescue.org/manual/Booting_SystemRescue/

The idea is to provide a "second" menu entry in the netboot.xyz menu for this tool that adds to the boot parameters something like:
rootpass=$(MAC_ADDRESS). Then if you boot this distro, the SSH password will be automatically generated (derived from the MAC address).

The menu is in this file:
https://github.com/netbootxyz/netboot.xyz/blob/development/roles/netbootxyz/templates/menu/systemrescue.ipxe.j2

And something like this will be sufficient:

kernel ${url}vmlinuz archisobasedir=sysresccd ${ipparam} archiso_http_srv=${url} rootpass=${mac:hexraw} nofirewall {{ kernel_params }}

What you think?
I feel it's easy to implement and very powerful. And regarding the security, this option will be optional as a secondary entry. And the use of the nofirewall is to make more easy to connect from outside.

Note: Inside the menu will be necessary to print the password used. One example:

                                    System Rescue

System Rescue Versions
   System Rescue 11.0
   System Rescue 11.0   [rootpass=00aabbcc1122]

You can test it using https://github.com/lars18th/netboot.xyz-custom/blob/master/custom.ipxe

I feel soon the developers will want to include this.