adds prompt to sudo for yubikey to make it easier to spot we are waiting for a key

This commit is contained in:
Menno van Leeuwen 2024-11-02 23:46:52 +01:00
parent aa3510cf77
commit 5dd78f9490
Signed by: vleeuwenmenno
SSH Key Fingerprint: SHA256:OJFmjANpakwD3F2Rsws4GLtbdz1TJ5tkQF0RZmF0TRE
5 changed files with 64 additions and 11 deletions

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@ -3,10 +3,8 @@ HISTFILE=~/.bash_history
HISTSIZE=1000
HISTFILESIZE=2000 # Adjusted to match both histfile and size criteria
# Alias Definitions
# Docker Compose Alias (Mostly for old shell scripts)
alias docker-compose='docker compose'
alias gg='git pull'
alias gl='git log --stat'
# Home Manager Configuration
alias hm='cd $HOME/dotfiles/config/home-manager/ && home-manager'
@ -37,6 +35,7 @@ alias ddpul='docker compose down && docker compose pull && docker compose up -d
# Git aliases
alias g='git'
alias gg='git pull'
alias gl='git log --stat'
alias gp='git push'
alias gs='git status -s'
alias gst='git status'

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@ -234,7 +234,6 @@ if [ "$#" -eq 0 ]; then
homemanager
cargopkgs
pipxpkgs
dockercmd
git_repos
flatpakpkgs
tailscalecmd
@ -263,7 +262,6 @@ else
cargopkgs
pipxpkgs
flatpakpkgs
dockercmd
tailscalecmd
;;
--pipx)
@ -275,9 +273,6 @@ else
--flatpak)
flatpakpkgs
;;
--docker)
dockercmd
;;
--tailscale)
tailscalecmd
;;

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@ -67,7 +67,6 @@
# Shell and terminal
starship # Cross-shell prompt
zellij # Modern terminal multiplexer
nushell # Modern shell
screen # Terminal multiplexer
# File viewers and processors

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@ -1,4 +1,6 @@
{ ... }:
{ pkgs, ... }:
{
imports = [ ./virtualization.nix ];
environment.systemPackages = with pkgs; [ yubikey-manager ];
}

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@ -1,4 +1,56 @@
{ config, pkgs, ... }:
let
# List of authorized YubiKey serial numbers
authorizedKeys = [
"10627969"
"30079068"
];
sudo-wrapper = pkgs.writeScriptBin "sudo" ''
#!${pkgs.bash}/bin/bash
# Function to show both terminal and desktop notification
notify() {
echo "$1" >&2
${pkgs.libnotify}/bin/notify-send -u critical "Sudo Authentication" "$1"
}
# Function to check if any of our authorized YubiKeys are present
check_yubikey() {
# Get list of connected YubiKeys
local keys=$(${pkgs.yubikey-manager}/bin/ykman list 2>/dev/null)
# Check if any of our authorized keys are in the list
for serial in ${toString authorizedKeys}; do
if echo "$keys" | grep -q "$serial"; then
return 0 # Found an authorized key
fi
done
return 1 # No authorized keys found
}
# Check if we already have sudo permissions
if [ "$EUID" -eq 0 ]; then
exec /run/wrappers/bin/sudo "$@"
fi
# Check for YubiKey presence
if check_yubikey; then
# YubiKey is present, show touch prompt
if [ -t 1 ]; then # Only show terminal message if interactive
echo -e "\033[1;34mPlease touch your YubiKey to authenticate...\033[0m" >&2
fi
${pkgs.libnotify}/bin/notify-send -u normal \
-i security-high \
"YubiKey Authentication" \
"Please touch your YubiKey to authenticate..."
fi
# Execute sudo with all original arguments
# This will fall back to password auth if no YubiKey is present
exec /run/wrappers/bin/sudo "$@"
'';
in
{
services.udev.packages = [ pkgs.yubikey-personalization ];
@ -7,12 +59,13 @@
enableSSHSupport = true;
};
# Install pam_u2f command
environment.systemPackages = with pkgs; [
pam_u2f
libnotify
sudo-wrapper
];
# Use normal U2F config without trying to modify PAM
security.pam.services = {
sudo.u2fAuth = true;
lock.u2fAuth = true;
@ -48,4 +101,9 @@
session optional pam_gnome_keyring.so auto_start
'';
};
# Make sure the wrapper sudo is used instead of the system one
environment.shellAliases = {
sudo = "${sudo-wrapper}/bin/sudo";
};
}