Kindle/Root Kindle Paperwhite PW3

Kindle Paperwhite 3 (2015) Wifi

SN: G090 G1xx xxxx xxxx
Original Firmware: 5.9.2.0.1 (3262860017)

generate root pw with python (for my kindle root / fionaXXX)

import hashlib
print("fiona%s"%hashlib.md5("<your kindle serial number with no spaces and all capital letters>\n".encode('utf-8')).hexdigest()[13:16])

Serial port
- connect kindle serial port to computer (1.8V, 115200 Baud)
- reboot through gui
- interrupt boot at uboot by pressing key
- ```
bootm 0xE41000
```
- ```
EXIT LOGIN
```
- login using above credentials

mkdir /tmp/main
mount /dev/mmcblk0p1 /tmp/main
vi /tmp/main/etc/passwd     # remove "x" in first line to disable pw

reboot
login with "root"
set password and enable password again

mntroot rw
passwd                  # to set root password
vi /etc/passwd          # add "x" where it was previously removed

SSH
- copy usbnet via usb port

mkdir -p /usr/local/bin
ln -s /mnt/us/usbnet/sbin/sshd /usr/sbin/sshd
ln -s /mnt/us/usbnet/bin/dropbearmulti /usr/local/bin/dropbear

/etc/upstart/sshd.conf

# ssh server for login
# needs to stop before localfs, will do by hand

#start on started system
#stop on (stopping system or ota-update)

start on framework_ready
stop on stopping system


export LANG LC_ALL
env LIBC_FATAL_STDERR_=1
env STDERR=/tmp/sshd.err

respawn

expect fork
#exec /usr/local/sbin/dropbear -r /usr/local/etc/dropbear/dropbear_rsa_host_key 2>> $STDERR
exec /usr/sbin/sshd

post-start script
    iptables -A INPUT -p tcp --dport 22 -j ACCEPT
end script

post-stop script
    source /etc/upstart/functions
    libc_scan
end script