333 lines
10 KiB
Bash
Executable File
333 lines
10 KiB
Bash
Executable File
#!/bin/bash
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# _____ _ _
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# | __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
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# | __| _| -_| -_| . | . | | . | . | | -_|
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# |__| |_| |___|___|___|___|_|_|_|___|___|_|_|___|
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#
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# Freedom in the Cloud
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#
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# This is an optional command for setting up a client machine
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# to then be able to log into a server. It installs a few packages
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# for things like IRC and twiddles crypto settings.
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#
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# It may not be necessary to run this on client machines, and
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# is provided for some extra convenience on a Debian or Arch
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# based system.
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#
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# License
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# =======
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#
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# Copyright (C) 2015-2018 Bob Mottram <bob@freedombone.net>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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PROJECT_NAME='freedombone'
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export TEXTDOMAIN=${PROJECT_NAME}-client
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export TEXTDOMAINDIR="/usr/share/locale"
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CURR_USER=$USER
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CURR_GROUP=$USER
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if [ -f /usr/bin/pacman ]; then
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CURR_GROUP='users'
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fi
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# setup for a specific app
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SETUP_CLIENT_APP_NAME=
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# Version number of this script
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VERSION="3.1"
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# get the main project file, so that some values can be extracted
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MAIN_PROJECT_FILE=/usr/local/bin/${PROJECT_NAME}
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if [ ! -f $MAIN_PROJECT_FILE ]; then
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MAIN_PROJECT_FILE=/usr/bin/${PROJECT_NAME}
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fi
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if [ ! -f $MAIN_PROJECT_FILE ]; then
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echo "The main project file $MAIN_PROJECT_FILE was not found"
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exit 72529
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fi
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# ssh (from https://stribika.github.io/2015/01/04/secure-secure-shell.html)
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UTILS_SSH="/usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-ssh"
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SSH_CIPHERS=$(grep 'SSH_CIPHERS=' "$UTILS_SSH" | head -n 1 | awk -F '"' '{print $2}')
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SSH_MACS=$(grep 'SSH_MACS=' "$UTILS_SSH" | head -n 1 | awk -F '"' '{print $2}')
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SSH_KEX=$(grep 'SSH_KEX=' "$UTILS_SSH" | head -n 1 | awk -F '"' '{print $2}')
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SSH_HOST_KEY_ALGORITHMS=$(grep 'SSH_HOST_KEY_ALGORITHMS=' "$UTILS_SSH" | head -n 1 | awk -F '"' '{print $2}')
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# refresh gpg keys every few hours
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REFRESH_GPG_KEYS_HOURS=2
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function global_rate_limit {
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SYSCTL_FILE=/etc/sysctl.conf
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if [ -f /usr/bin/pacman ]; then
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SYSCTL_FILE=/etc/sysctl.d/99-sysctl.conf
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fi
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if [ ! -f $SYSCTL_FILE ]; then
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sudo touch $SYSCTL_FILE
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fi
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sudo cp $SYSCTL_FILE ~/sysctl.conf
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sudo chown "$CURR_USER":"$CURR_GROUP" ~/sysctl.conf
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if ! grep -q "tcp_challenge_ack_limit" ~/sysctl.conf; then
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echo 'net.ipv4.tcp_challenge_ack_limit = 999999999' >> ~/sysctl.conf
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else
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sed -i 's|net.ipv4.tcp_challenge_ack_limit.*|net.ipv4.tcp_challenge_ack_limit = 999999999|g' ~/sysctl.conf
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fi
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sudo cp ~/sysctl.conf $SYSCTL_FILE
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sudo rm ~/sysctl.conf
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sudo sysctl -p -q $SYSCTL_FILE
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}
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function refresh_gpg_keys {
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if [ ! -f /usr/bin/gpg ]; then
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if [ ! -f /usr/bin/pacman ]; then
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sudo apt-get -yq install gnupg
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else
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sudo pacman -S --noconfirm gnupg
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fi
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fi
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sudo cp /etc/crontab ~/temp_crontab
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if [ -f ~/temp_crontab ]; then
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sudo chown "$CURR_USER":"$CURR_GROUP" ~/temp_crontab
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if grep -q 'test' ~/temp_crontab; then
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if ! grep -q 'gpg --refresh-keys' ~/temp_crontab; then
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echo "0 */$REFRESH_GPG_KEYS_HOURS * * * $CURR_USER /usr/bin/gpg --refresh-keys > /dev/null" >> ~/temp_crontab
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sudo cp ~/temp_crontab /etc/crontab
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sudo chown root:root /etc/crontab
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fi
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fi
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rm ~/temp_crontab
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fi
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}
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# see https://stribika.github.io/2015/01/04/secure-secure-shell.html
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function ssh_remove_small_moduli {
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# shellcheck disable=SC2024
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sudo awk '$5 > 2000' /etc/ssh/moduli > "/home/$CURR_USER/moduli"
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# shellcheck disable=SC2086
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sudo mv /home/$CURR_USER/moduli /etc/ssh/moduli
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}
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function configure_ssh_client {
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if [ -f /usr/bin/pacman ]; then
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sudo pacman --noconfirm -S openbsd-netcat
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else
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sudo apt-get -yq install tor connect-proxy vim-common
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fi
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#sudo sed -i 's/# PasswordAuthentication.*/ PasswordAuthentication no/g' /etc/ssh/ssh_config
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#sudo sed -i 's/# ChallengeResponseAuthentication.*/ ChallengeResponseAuthentication no/g' /etc/ssh/ssh_config
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sudo sed -i "s/# HostKeyAlgorithms.*/ HostKeyAlgorithms $SSH_HOST_KEY_ALGORITHMS/g" /etc/ssh/ssh_config
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sudo sed -i "s/# Ciphers.*/ Ciphers $SSH_CIPHERS/g" /etc/ssh/ssh_config
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sudo sed -i "s/# MACs.*/ MACs $SSH_MACS/g" /etc/ssh/ssh_config
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sudo sed -i "s/HostKeyAlgorithms.*/HostKeyAlgorithms $SSH_HOST_KEY_ALGORITHMS/g" /etc/ssh/ssh_config
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if ! grep -q "HostKeyAlgorithms" /etc/ssh/ssh_config; then
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sudo cp /etc/ssh/ssh_config ~/ssh_config
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sudo chown "$CURR_USER":"$CURR_GROUP" ~/ssh_config
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echo " HostKeyAlgorithms $SSH_HOST_KEY_ALGORITHMS" >> ~/ssh_config
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sudo mv ~/ssh_config /etc/ssh/ssh_config
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sudo chown root:root /etc/ssh/ssh_config
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fi
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sudo sed -i "s/HostKeyAlgorithms.*/#HostKeyAlgorithms $SSH_HOST_KEY_ALGORITHMS/g" /etc/ssh/ssh_config
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sudo sed -i "s/Ciphers.*/Ciphers $SSH_CIPHERS/g" /etc/ssh/ssh_config
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if ! grep -q "Ciphers " /etc/ssh/ssh_config; then
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sudo cp /etc/ssh/ssh_config ~/ssh_config
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sudo chown "$CURR_USER":"$CURR_GROUP" ~/ssh_config
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echo " Ciphers $SSH_CIPHERS" >> ~/ssh_config
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sudo mv ~/ssh_config /etc/ssh/ssh_config
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sudo chown root:root /etc/ssh/ssh_config
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fi
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sudo sed -i "s/MACs.*/MACs $SSH_MACS/g" /etc/ssh/ssh_config
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if ! grep -q "MACs " /etc/ssh/ssh_config; then
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sudo cp /etc/ssh/ssh_config ~/ssh_config
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sudo chown "$CURR_USER":"$CURR_GROUP" ~/ssh_config
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echo " MACs $SSH_MACS" >> ~/ssh_config
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sudo mv ~/ssh_config /etc/ssh/ssh_config
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sudo chown root:root /etc/ssh/ssh_config
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fi
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# Create ssh keys
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if [ ! -f "/home/$CURR_USER/.ssh/id_ed25519" ]; then
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ssh-keygen -t ed25519 -o -a 100
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fi
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if [ ! -f "/home/$CURR_USER/.ssh/id_rsa" ]; then
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ssh-keygen -t rsa -b 2048 -o -a 100
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fi
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ssh_remove_small_moduli
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if [ ! -d ~/.ssh ]; then
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mkdir ~/.ssh
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fi
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if [ ! -f ~/.ssh/config ]; then
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touch ~/.ssh/config
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fi
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proxycmd="connect -R remote -5 -S 127.0.0.1:9050 %h %p"
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if [ -f /usr/bin/pacman ]; then
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proxycmd="/usr/bin/nc -X 5 -x 127.0.0.1:9050 %h %p"
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fi
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if ! grep -q "# ${PROJECT_NAME} settings" ~/.ssh/config; then
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if ! grep -q 'ProxyCommand' ~/.ssh/config; then
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{ echo "# ${PROJECT_NAME} settings start";
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echo 'Host *.onion';
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echo ' ServerAliveInterval 60';
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echo ' ServerAliveCountMax 3';
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echo " ProxyCommand $proxycmd";
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echo 'Host *';
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echo ' ServerAliveInterval 60';
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echo ' ServerAliveCountMax 3';
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echo "# ${PROJECT_NAME} settings end"; } >> ~/.ssh/config
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fi
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fi
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echo ''
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echo $'Go to the Administrator Control Panel, select "Manage Users", '
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echo $'"Change user ssh public key" then "yes" and paste the following:'
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echo ''
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cat "/home/$CURR_USER/.ssh/id_rsa.pub"
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cat "/home/$CURR_USER/.ssh/id_ed25519.pub"
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echo ''
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echo $'Then go to "Security Settings", select "Allow ssh login with passwords"'
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echo $'and set it to "no".'
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}
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function show_help {
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echo ''
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echo $"${PROJECT_NAME}-client"
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echo ''
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exit 0
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}
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function setup_client_app_irc {
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echo $'Setting up hexchat'
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if [ ! -f /usr/bin/pacman ]; then
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sudo apt-get -yq install tor hexchat tor
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else
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sudo pacman -S --noconfirm hexchat tor
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fi
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if [ ! -d "/home/$CURR_USER/.config/hexchat" ]; then
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mkdir -p "/home/$CURR_USER/.config/hexchat"
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fi
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{ echo 'net_proxy_host = 127.0.0.1';
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echo 'net_proxy_port = 9050';
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echo 'net_proxy_type = 3';
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echo 'net_proxy_use = 0';
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echo 'net_proxy_auth = 1';
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echo 'net_proxy_pass = HexChat';
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echo 'net_proxy_user = HexChat';
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echo 'dcc_auto_chat = 0';
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echo 'dcc_auto_resume = 0';
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echo 'dcc_auto_send = 0';
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echo 'irc_hide_version = 1';
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echo 'identd = 0';
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echo 'away_reason =';
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echo 'irc_part_reason =';
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echo 'irc_quit_reason =';
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echo "irc_real_name = ${USER}";
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echo "irc_user_name = ${USER}";
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echo "irc_nick1 = ${USER}";
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echo "irc_nick2 = ${USER}_";
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echo "irc_nick3 = ${USER}__";
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echo 'completion_suffix = :';
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echo 'gui_slist_skip = 1'; } > "/home/$CURR_USER/.config/hexchat/hexchat.conf"
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echo $'hexchat configured'
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}
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function setup_client_app {
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if [ ! $SETUP_CLIENT_APP_NAME ]; then
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return
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fi
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case $SETUP_CLIENT_APP_NAME in
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hexchat|xchat|irc)
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setup_client_app_irc
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;;
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esac
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exit 0
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}
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function remove_known_hosts_entries {
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# remove any previous freedombone entries from known hosts
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if [ -f "/home/$CURR_USER/.ssh/known_hosts" ]; then
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sed -i "/${PROJECT_NAME}.local/d" "/home/$CURR_USER/.ssh/known_hosts"
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fi
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}
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function setup_avahi_client {
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echo $'Configuring Avahi'
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if [ ! -f /usr/bin/pacman ]; then
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sudo apt-get -yq install avahi-utils avahi-dnsconfd
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else
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sudo pacman -S --noconfirm avahi nss-mdns
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sudo sed -i 's|hosts:.*|hosts: files mdns_minimal [NOTFOUND=return] dns myhostname|g' /etc/nsswitch.conf
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fi
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}
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function verify_ssh_server_key {
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ssh -o VisualHostKey=yes -o FingerprintHash=sha256 ${PROJECT_NAME}.local -p 2222 &
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pid=$!
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sleep 15
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kill ${pid}
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}
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while [ $# -gt 0 ]
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do
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key="$1"
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case $key in
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-h|--help)
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show_help
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;;
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--essid)
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shift
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WIFI_SSID="$1"
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;;
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--channel)
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shift
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WIFI_CHANNEL=${1}
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;;
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-s|--setup)
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shift
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SETUP_CLIENT_APP_NAME=${1}
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;;
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-v|--verify|--verifykeys)
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verify_ssh_server_key
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exit 0
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;;
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*)
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# unknown option
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;;
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esac
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shift
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done
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echo $'Configuring client'
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setup_avahi_client
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setup_client_app
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refresh_gpg_keys
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configure_ssh_client
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global_rate_limit
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remove_known_hosts_entries
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echo $'Configuration complete'
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exit 0
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