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freedombone/src/freedombone-client

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#!/bin/bash
#
# .---. . .
# | | |
# |--- .--. .-. .-. .-.| .-. .--.--. |.-. .-. .--. .-.
# | | (.-' (.-' ( | ( )| | | | )( )| | (.-'
# ' ' --' --' -' - -' ' ' -' -' -' ' - --'
#
# Freedom in the Cloud
#
# License
# =======
#
# Copyright (C) 2015-2018 Bob Mottram <bob@freedombone.net>
#
# 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
CURR_GROUP=$USER
if [ -f /usr/bin/pacman ]; then
CURR_GROUP='users'
fi
ENABLE_MONKEYSPHERE=
# setup for a specific app
SETUP_CLIENT_APP_NAME=
# Version number of this script
VERSION="2.00"
# get the main project file, so that some values can be extracted
MAIN_PROJECT_FILE=/usr/local/bin/${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 $MAIN_PROJECT_FILE was not found"
exit 72529
fi
# ssh (from https://stribika.github.io/2015/01/04/secure-secure-shell.html)
UTILS_SSH="/usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-ssh"
SSH_CIPHERS=$(grep 'SSH_CIPHERS=' "$UTILS_SSH" | head -n 1 | awk -F '"' '{print $2}')
SSH_MACS=$(grep 'SSH_MACS=' "$UTILS_SSH" | head -n 1 | awk -F '"' '{print $2}')
SSH_KEX=$(grep 'SSH_KEX=' "$UTILS_SSH" | head -n 1 | awk -F '"' '{print $2}')
SSH_HOST_KEY_ALGORITHMS=$(grep 'SSH_HOST_KEY_ALGORITHMS=' "$UTILS_SSH" | head -n 1 | awk -F '"' '{print $2}')
# refresh gpg keys every few hours
REFRESH_GPG_KEYS_HOURS=2
function global_rate_limit {
SYSCTL_FILE=/etc/sysctl.conf
if [ -f /usr/bin/pacman ]; then
SYSCTL_FILE=/etc/sysctl.d/99-sysctl.conf
fi
if [ ! -f $SYSCTL_FILE ]; then
sudo touch $SYSCTL_FILE
fi
sudo cp $SYSCTL_FILE ~/sysctl.conf
sudo chown "$CURR_USER":"$CURR_GROUP" ~/sysctl.conf
if ! grep -q "tcp_challenge_ack_limit" ~/sysctl.conf; then
echo 'net.ipv4.tcp_challenge_ack_limit = 999999999' >> ~/sysctl.conf
else
sed -i 's|net.ipv4.tcp_challenge_ack_limit.*|net.ipv4.tcp_challenge_ack_limit = 999999999|g' ~/sysctl.conf
fi
sudo cp ~/sysctl.conf $SYSCTL_FILE
sudo rm ~/sysctl.conf
sudo sysctl -p -q $SYSCTL_FILE
}
function refresh_gpg_keys {
if [ ! -f /usr/bin/gpg ]; then
if [ ! -f /usr/bin/pacman ]; then
sudo apt-get -yq install gnupg
else
sudo pacman -S --noconfirm gnupg
fi
fi
sudo cp /etc/crontab ~/temp_crontab
sudo chown "$CURR_USER":"$CURR_GROUP" ~/temp_crontab
if ! grep -q 'gpg --refresh-keys' ~/temp_crontab; then
echo "0 */$REFRESH_GPG_KEYS_HOURS * * * $CURR_USER /usr/bin/gpg --refresh-keys > /dev/null" >> ~/temp_crontab
sudo cp ~/temp_crontab /etc/crontab
sudo 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 {
# shellcheck disable=SC2024
sudo awk '$5 > 2000' /etc/ssh/moduli > "/home/$CURR_USER/moduli"
# shellcheck disable=SC2086
sudo mv /home/$CURR_USER/moduli /etc/ssh/moduli
}
function configure_ssh_client {
if [ -f /usr/bin/pacman ]; then
sudo pacman --noconfirm -S openbsd-netcat
else
sudo apt-get -yq install tor connect-proxy vim-common
fi
#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
sudo sed -i "s/HostKeyAlgorithms.*/HostKeyAlgorithms $SSH_HOST_KEY_ALGORITHMS/g" /etc/ssh/ssh_config
if ! grep -q "HostKeyAlgorithms" /etc/ssh/ssh_config; then
sudo cp /etc/ssh/ssh_config ~/ssh_config
sudo chown "$CURR_USER":"$CURR_GROUP" ~/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/HostKeyAlgorithms.*/#HostKeyAlgorithms $SSH_HOST_KEY_ALGORITHMS/g" /etc/ssh/ssh_config
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_GROUP" ~/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_GROUP" ~/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 2048 -o -a 100
fi
ssh_remove_small_moduli
if [ ! -d ~/.ssh ]; then
mkdir ~/.ssh
fi
if [ ! -f ~/.ssh/config ]; then
touch ~/.ssh/config
fi
proxycmd="connect -R remote -5 -S 127.0.0.1:9050 %h %p"
if [ -f /usr/bin/pacman ]; then
proxycmd="/usr/bin/nc -X 5 -x 127.0.0.1:9050 %h %p"
fi
if ! grep -q "# ${PROJECT_NAME} settings" ~/.ssh/config; then
if ! grep -q 'ProxyCommand' ~/.ssh/config; then
{ echo "# ${PROJECT_NAME} settings start";
echo 'Host *.onion';
echo ' ServerAliveInterval 60';
echo ' ServerAliveCountMax 3'; } >> ~/.ssh/config
if [[ "$ENABLE_MONKEYSPHERE" == $'yes' || "$ENABLE_MONKEYSPHERE" == $'y' ]]; then
echo " ProxyCommand sh -c 'monkeysphere ssh-proxycommand --no-connect %h %p ; $proxycmd'" >> ~/.ssh/config
else
echo " ProxyCommand $proxycmd" >> ~/.ssh/config
fi
{ echo 'Host *';
echo ' ServerAliveInterval 60';
echo ' ServerAliveCountMax 3'; } >> ~/.ssh/config
if [[ "$ENABLE_MONKEYSPHERE" == $'yes' || "$ENABLE_MONKEYSPHERE" == $'y' ]]; then
echo ' ProxyCommand monkeysphere ssh-proxycommand %h %p' >> ~/.ssh/config
fi
echo "# ${PROJECT_NAME} settings end" >> ~/.ssh/config
fi
fi
echo ''
echo $'Go to the Administrator Control Panel, select "Manage Users", '
echo $'"Change user ssh public key" then "yes" and paste the following:'
echo ''
cat "/home/$CURR_USER/.ssh/id_rsa.pub"
cat "/home/$CURR_USER/.ssh/id_ed25519.pub"
echo ''
echo $'Then go to "Security Settings", select "Allow ssh login with passwords"'
echo $'and set it to "no".'
}
function configure_monkeysphere {
if [ -f /usr/bin/pacman ]; then
return
fi
sudo apt-get -yq install monkeysphere
}
function show_help {
echo ''
echo $"${PROJECT_NAME}-client --monkeysphere [yes|no]"
echo ''
exit 0
}
function setup_client_app_irc {
echo $'Setting up hexchat'
if [ ! -f /usr/bin/pacman ]; then
sudo apt-get -yq install tor hexchat tor
else
sudo pacman -S --noconfirm hexchat tor
fi
if [ ! -d "/home/$CURR_USER/.config/hexchat" ]; then
mkdir -p "/home/$CURR_USER/.config/hexchat"
fi
{ echo 'net_proxy_host = 127.0.0.1';
echo 'net_proxy_port = 9050';
echo 'net_proxy_type = 3';
echo 'net_proxy_use = 0';
echo 'net_proxy_auth = 1';
echo 'net_proxy_pass = HexChat';
echo 'net_proxy_user = HexChat';
echo 'dcc_auto_chat = 0';
echo 'dcc_auto_resume = 0';
echo 'dcc_auto_send = 0';
echo 'irc_hide_version = 1';
echo 'identd = 0';
echo 'away_reason =';
echo 'irc_part_reason =';
echo 'irc_quit_reason =';
echo "irc_real_name = ${USER}";
echo "irc_user_name = ${USER}";
echo "irc_nick1 = ${USER}";
echo "irc_nick2 = ${USER}_";
echo "irc_nick3 = ${USER}__";
echo 'completion_suffix = :';
echo 'gui_slist_skip = 1'; } > "/home/$CURR_USER/.config/hexchat/hexchat.conf"
echo $'hexchat configured'
}
function setup_client_app {
if [ ! $SETUP_CLIENT_APP_NAME ]; then
return
fi
case $SETUP_CLIENT_APP_NAME in
hexchat|xchat|irc)
setup_client_app_irc
;;
esac
exit 0
}
function remove_known_hosts_entries {
# remove any previous freedombone entries from known hosts
if [ -f "/home/$CURR_USER/.ssh/known_hosts" ]; then
sed -i "/${PROJECT_NAME}.local/d" "/home/$CURR_USER/.ssh/known_hosts"
fi
}
function setup_avahi_client {
echo $'Configuring Avahi'
if [ ! -f /usr/bin/pacman ]; then
sudo apt-get -yq install avahi-utils avahi-dnsconfd
else
sudo pacman -S --noconfirm avahi nss-mdns
sudo sed -i 's|hosts:.*|hosts: files mdns_minimal [NOTFOUND=return] dns myhostname|g' /etc/nsswitch.conf
fi
}
function verify_ssh_server_key {
ssh -o VisualHostKey=yes -o FingerprintHash=sha256 ${PROJECT_NAME}.local -p 2222 &
pid=$!
sleep 15
kill ${pid}
}
while [ $# -gt 0 ]
do
key="$1"
case $key in
-h|--help)
show_help
;;
--essid)
shift
WIFI_SSID="$1"
;;
--channel)
shift
WIFI_CHANNEL=${1}
;;
-s|--setup)
shift
SETUP_CLIENT_APP_NAME=${1}
;;
-v|--verify|--verifykeys)
verify_ssh_server_key
exit 0
;;
--monkeysphere|--ms|--monkey)
shift
ENABLE_MONKEYSPHERE=${1}
;;
*)
# unknown option
;;
esac
shift
done
echo $'Configuring client'
setup_avahi_client
setup_client_app
refresh_gpg_keys
configure_ssh_client
global_rate_limit
configure_monkeysphere
remove_known_hosts_entries
echo $'Configuration complete'
exit 0
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