freedombone/src/freedombone-client

#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# License
# =======
#
# Copyright (C) 2015-2016 Bob Mottram <bob@robotics.uk.to>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

PROJECT_NAME='freedombone'

export TEXTDOMAIN=${PROJECT_NAME}-client
export TEXTDOMAINDIR="/usr/share/locale"

CURR_USER=$USER
MESH_CLIENT_INSTALL=

# Version number of this script
VERSION="1.01"

# get the main project file, so that some values can be extracted
MAIN_PROJECT_FILE=/usr/local/bin/${PROJECT_NAME}
if [ ! -f $MAIN_PROJECT_FILE ]; then
	MAIN_PROJECT_FILE=/usr/bin/${PROJECT_NAME}
fi
if [ ! -f $MAIN_PROJECT_FILE ]; then
	echo "The main project file $MAIN_PROJECT_FILE was not found"
	exit 72529
fi

# ssh (from https://stribika.github.io/2015/01/04/secure-secure-shell.html)
SSH_CIPHERS=$(cat $MAIN_PROJECT_FILE | grep 'SSH_CIPHERS=' | head -n 1 | awk -F '"' '{print $2}')
SSH_MACS=$(cat $MAIN_PROJECT_FILE | grep 'SSH_MACS=' | head -n 1 | awk -F '"' '{print $2}')
SSH_KEX=$(cat $MAIN_PROJECT_FILE | grep 'SSH_KEX=' | head -n 1 | awk -F '"' '{print $2}')
SSH_HOST_KEY_ALGORITHMS=$(cat $MAIN_PROJECT_FILE | grep 'SSH_HOST_KEY_ALGORITHMS=' | head -n 1 | awk -F '"' '{print $2}')

# refresh gpg keys every few hours
REFRESH_GPG_KEYS_HOURS=2

function refresh_gpg_keys {
	if [ ! -f /usr/bin/gpg ]; then
		sudo apt-get -y install gnupg
	fi
	sudo cp /etc/crontab ~/temp_crontab
	sudo chown $CURR_USER:$CURR_USER ~/temp_crontab
	if ! grep -q "gpg --refresh-keys" ~/temp_crontab; then
		echo "0            */$REFRESH_GPG_KEYS_HOURS *   *   *   $CURR_USER /usr/bin/gpg --refresh-keys > /dev/null" >> ~/temp_crontab
		sudo cp ~/temp_crontab /etc/crontab
		chown root:root /etc/crontab
	fi
	rm ~/temp_crontab
}

# see https://stribika.github.io/2015/01/04/secure-secure-shell.html
function ssh_remove_small_moduli {
	sudo awk '$5 > 2000' /etc/ssh/moduli > /home/$CURR_USER/moduli
	sudo mv /home/$CURR_USER/moduli /etc/ssh/moduli
}

function configure_ssh_client {
	#sudo sed -i 's/#   PasswordAuthentication.*/   PasswordAuthentication no/g' /etc/ssh/ssh_config
	#sudo sed -i 's/#   ChallengeResponseAuthentication.*/   ChallengeResponseAuthentication no/g' /etc/ssh/ssh_config
	sudo sed -i "s/#   HostKeyAlgorithms.*/   HostKeyAlgorithms $SSH_HOST_KEY_ALGORITHMS/g" /etc/ssh/ssh_config
	sudo sed -i "s/#   Ciphers.*/   Ciphers $SSH_CIPHERS/g" /etc/ssh/ssh_config
	sudo sed -i "s/#   MACs.*/   MACs $SSH_MACS/g" /etc/ssh/ssh_config
	if ! grep -q "HostKeyAlgorithms" /etc/ssh/ssh_config; then
		sudo cp /etc/ssh/ssh_config ~/ssh_config
		sudo chown $CURR_USER:$CURR_USER ~/ssh_config
		echo "   HostKeyAlgorithms $SSH_HOST_KEY_ALGORITHMS" >> ~/ssh_config
		sudo mv ~/ssh_config /etc/ssh/ssh_config
		sudo chown root:root /etc/ssh/ssh_config
	fi
	sudo sed -i "s/Ciphers.*/Ciphers $SSH_CIPHERS/g" /etc/ssh/ssh_config
	if ! grep -q "Ciphers " /etc/ssh/ssh_config; then
		sudo cp /etc/ssh/ssh_config ~/ssh_config
		sudo chown $CURR_USER:$CURR_USER ~/ssh_config
		echo "   Ciphers $SSH_CIPHERS" >> ~/ssh_config
		sudo mv ~/ssh_config /etc/ssh/ssh_config
		sudo chown root:root /etc/ssh/ssh_config
	fi
	sudo sed -i "s/MACs.*/MACs $SSH_MACS/g" /etc/ssh/ssh_config
	if ! grep -q "MACs " /etc/ssh/ssh_config; then
		sudo cp /etc/ssh/ssh_config ~/ssh_config
		sudo chown $CURR_USER:$CURR_USER ~/ssh_config
		echo "   MACs $SSH_MACS" >> ~/ssh_config
		sudo mv ~/ssh_config /etc/ssh/ssh_config
		sudo chown root:root /etc/ssh/ssh_config
	fi

	# Create ssh keys
	if [ ! -f /home/$CURR_USER/.ssh/id_ed25519 ]; then
		ssh-keygen -t ed25519 -o -a 100
	fi
	if [ ! -f /home/$CURR_USER/.ssh/id_rsa ]; then
		ssh-keygen -t rsa -b 4096 -o -a 100
	fi

	ssh_remove_small_moduli

	if [ ! -d ~/.ssh ]; then
		mkdir ~/.ssh
	fi
	echo 'Host *.onion' > ~/.ssh/config
	echo '  ServerAliveInterval 60' >> ~/.ssh/config
	echo '  ServerAliveCountMax 3' >> ~/.ssh/config
	echo "  ProxyCommand connect -R remote -5 -S 127.0.0.1:9050 %h %p" >> ~/.ssh/config
	echo "#  ProxyCommand sh -c 'monkeysphere ssh-proxycommand --no-connect %h %p ; connect -R remote -5 -S 127.0.0.1:9050 %h %p'" >> ~/.ssh/config
	echo 'Host *' >> ~/.ssh/config
	echo '  ServerAliveInterval 60' >> ~/.ssh/config
	echo '  ServerAliveCountMax 3' >> ~/.ssh/config
	echo '#  ProxyCommand monkeysphere ssh-proxycommand %h %p' >> ~/.ssh/config

	echo ''
	echo $'Copy the following into a file called /home/username/.ssh/authorized_keys on the Freedombone server'
	echo ''
	echo $(cat /home/$CURR_USER/.ssh/id_rsa.pub)
	echo $(cat /home/$CURR_USER/.ssh/id_ed25519.pub)
	echo ''
}

function configure_monkeysphere {
	sudo apt-get -y install tor connect-proxy monkeysphere
}

function show_help {
	echo ''
	echo $"${PROJECT_NAME}-client --mesh [yes|no]"
	echo ''
	exit 0
}

while [[ $# > 1 ]]
do
	key="$1"

	case $key in
		-h|--help)
			show_help
			;;
		--essid)
			shift
			WIFI_SSID="$1"
			;;
		--channel)
			shift
			WIFI_CHANNEL=${1}
			;;
		--mesh)
			shift
			MESH_CLIENT_INSTALL=${1}
			;;
		*)
			# unknown option
			;;
	esac
	shift
done

echo $'Configuring client'
refresh_gpg_keys
configure_ssh_client
configure_monkeysphere
if [[ $MESH_CLIENT_INSTALL == $'yes' || $MESH_CLIENT_INSTALL == $'y' || $MESH_CLIENT_INSTALL == $'on' ]]; then
	${PROJECT_NAME}-mesh-install batman_client
	${PROJECT_NAME}-mesh-install babel_client
fi
echo $'Configuration complete'
exit 0