nixos-config/images/lib/remote-access.nix

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{
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# cat ~/.ssh/id_rsa.pub
publicSshKey ? "",
# remote-install-get-hiddenReceiver
hiddenReceiver ? "", }:
{ config, lib, pkgs, ... }: {
imports = [
{ # system setup
networking.hostName = "liveos";
users.extraUsers = {
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root = { openssh.authorizedKeys.keys = [ publicSshKey ]; };
};
}
{ # installed packages
nixpkgs.config.allowUnfree = true;
environment.systemPackages = with pkgs; [
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#style
most
rxvt_unicode.terminfo
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#monitoring tools
htop
iotop
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#network
iptables
iftop
nmap
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#stuff for dl
aria2
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#neat utils
pciutils
psmisc
tmux
usbutils
git
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#unpack stuff
p7zip
unzip
unrar
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#data recovery
ddrescue
ntfs3g
dosfstools
];
}
{ # bash configuration
programs.bash = {
enableCompletion = true;
interactiveShellInit = ''
HISTCONTROL='erasedups:ignorespace'
HISTSIZE=65536
HISTFILESIZE=$HISTSIZE
shopt -s checkhash
shopt -s histappend histreedit histverify
shopt -s no_empty_cmd_completion
complete -d cd
'';
promptInit = ''
if test $UID = 0; then
PS1='\[\033[1;31m\]\w\[\033[0m\] '
PROMPT_COMMAND='echo -ne "\033]0;$$ $USER@$PWD\007"'
elif test $UID = 1337; then
PS1='\[\033[1;32m\]\w\[\033[0m\] '
PROMPT_COMMAND='echo -ne "\033]0;$$ $PWD\007"'
else
PS1='\[\033[1;33m\]\u@\w\[\033[0m\] '
PROMPT_COMMAND='echo -ne "\033]0;$$ $USER@$PWD\007"'
fi
if test -n "$SSH_CLIENT"; then
PS1='\[\033[35m\]\h'" $PS1"
PROMPT_COMMAND='echo -ne "\033]0;$$ $HOSTNAME $USER@$PWD\007"'
fi
'';
};
}
{ # ssh configuration
services.openssh.enable = true;
services.openssh.passwordAuthentication = false;
systemd.services.sshd.wantedBy = lib.mkForce [ "multi-user.target" ];
}
{ # hidden ssh announce
config = let
torDirectory = "/var/lib/tor";
hiddenServiceDir = torDirectory + "/liveos";
in {
services.tor = {
enable = true;
client.enable = true;
extraConfig = ''
HiddenServiceDir ${hiddenServiceDir}
HiddenServicePort 22 127.0.0.1:22
'';
};
systemd.services.hidden-ssh-announce = {
description = "irc announce hidden ssh";
after = [ "tor.service" "network-online.target" ];
wants = [ "tor.service" ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
ExecStart = pkgs.writers.writeDash "irc-announce-ssh" ''
set -efu
until test -e ${hiddenServiceDir}/hostname; do
echo "still waiting for ${hiddenServiceDir}/hostname"
sleep 1
done
until ${pkgs.tor}/bin/torify ${pkgs.netcat-openbsd}/bin/nc -z ${hiddenReceiver} 1337; do sleep 1; done && \
echo "torify ssh root@$(cat ${hiddenServiceDir}/hostname) -i ~/.ssh/id_rsa" | ${pkgs.tor}/bin/torify ${pkgs.nmap}/bin/ncat ${hiddenReceiver} 1337
'';
PrivateTmp = "true";
User = "tor";
Type = "oneshot";
};
};
};
}
];
}