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Bob Mottram 2015-01-24 20:02:39 +00:00
parent e15f27b722
commit e3d9b91979
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#!/bin/bash
#
# .---. . .
# | | |
# |--- .--. .-. .-. .-.| .-. .--.--. |.-. .-. .--. .-.
# | | (.-' (.-' ( | ( )| | | | )( )| | (.-'
# ' ' --' --' -' - -' ' ' -' -' -' ' - --'
#
# Freedom in the Cloud
#
# License
# =======
#
# Copyright (C) 2015 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 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
CURR_USER=$USER
# Version number of this script
VERSION="1.00"
# ssh (from https://stribika.github.io/2015/01/04/secure-secure-shell.html)
SSH_CIPHERS="chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr"
SSH_MACS="hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-ripemd160-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,hmac-ripemd160,umac-128@openssh.com"
SSH_KEX="curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256"
SSH_HOST_KEY_ALGORITHMS="ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-ed25519,ssh-rsa"
# 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 echo " HostKeyAlgorithms $SSH_HOST_KEY_ALGORITHMS" >> /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 echo " Ciphers $SSH_CIPHERS" >> /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 echo " MACs $SSH_MACS" >> /etc/ssh/ssh_config
fi
# Create ssh keys
if [ ! -f /home/$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
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 ''
}
echo 'Configuring client'
configure_ssh_client
echo 'Configuration complete'