old_information.md

Steps for modify firmware before flash

• Open firmware ZIP using password: C300X

• Note for C100X use password: C100X

• unGZ file: btweb_only.ext4.gz to btweb_only.ext4

• Mount root filesystem: sudo mount -o loop btweb_only.ext4 /media/mounted/

• Select your password, example: pwned123

• See the salt of your selected password:

openssl passwd -1 -salt root pwned123
$1$root$0i6hbFPn3JOGMeEF0LgEV1

cd /media/mounted/etc/
sudo vim shadow

• Set to:

root2:$1$root$0i6hbFPn3JOGMeEF0LgEV1:18033:0:99999:7:::
bticino2:$1$root$0i6hbFPn3JOGMeEF0LgEV1:18033:0:99999:7:::

sudo vim passwd

• Set to:

 root2:x:0:0:root:/home/root:/bin/sh
 bticino2:x:1000:1000::/home/bticino:/bin/sh

• Setup dropbear (is a SSH server)

cd /media/mounted/etc/rc5.d/
sudo ln -s ../init.d/dropbear S98dropbear

Access SSH and scripts for open door

In this examples, we are using next:

UNIT = yyyyyyy
MAC_ADDRESS = 00-03-50-xx-xx-xx
IP = 192.168.1.97 PASSWORD = pwned123

Replace with your needs.

Change password for user root2

mount -oremount,rw /
passwd root2
mount -oremount,ro /

Adapt your SSH access

• In terminal 1: access inside bticino and setup access for RW:

  • mount -oremount,rw /
  • Not close this terminal

• In terminal 2: create SSH key:

  ssh-keygen -o -b 4096 -t rsa -f ./keys/bticinokey

  Touch: [INTRO]+[INTRO]

• In terminal 2: copy SSH key inside the device:

  ssh-copy-id -i ./keys/bticinokey.pub root2@192.168.1.97

• In terminal 2: setup SSH key with rights and in your user home:

  cp ./keys/bticinokey ~/.ssh/bticinokey chmod 600 ~/.ssh/bticinokey

• In terminal 2: config SSH easy access:

  $ cat ~/.ssh/config

  Host bticino
    HostName 192.168.1.97
    User root2
    StrictHostKeyChecking no
    IdentityFile ~/.ssh/bticinokey

• In terminal 1: (inside your Bticino)

  cd
  mkdir .ssh
  cp /etc/dropbear/authorized_keys .ssh/authorized_keys

• In terminal 2: test:

  ssh bticino

• In terminal 1: (inside your Bticino) change to RO access:

  • mount -oremount,ro /