host MUD via ssh over tor with only menus (mostly)

README.md

@@ -66,4 +66,6 @@ To cast a spell, `cd` into the spells directory. Then, the first time you cast t
 
 # How to Begin
 
+To access the mud main menu, run chmod +x mud and then ./mud in this directory.
+
 A tutorial is coming soon. For now, explore the `./spells` directory. Try reading or running the `rosetta-stone` script or the `jump` script.

mud

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+mud-menu

spells/add-player

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+# This script creates a new player in the MUD and associates them with an SSH key.
+# It first prompts the user for a player name and an SSH key.
+# It then checks if a user with that player name and SSH key already exists, and if so, exits.
+# If the user and key combination do not already exist, it adds the key to the authorized_keys file and creates the corresponding user.
+
+echo "Enter player name:"
+read playername
+
+echo "Enter SSH key:"
+read sshkey
+
+# check if user already exists
+if id "$playername" >/dev/null 2>&1; then
+    echo "Error: user $playername already exists. Please delete the existing user first and try again."
+    exit 1
+fi
+
+# check if key already exists in authorized_keys file
+if grep -q "$sshkey" ~/.ssh/authorized_keys; then
+    echo "Error: key already exists in authorized_keys file. Please delete the existing key first and try again."
+    exit 1
+fi
+
+# add key to authorized_keys file
+echo "$sshkey $playername@mud" >> ~/.ssh/authorized_keys
+
+# create user
+useradd "$playername"

spells/cantrips/menu

@@ -1,29 +1,34 @@
 #!/usr/bin/env sh
 
 # This script generates a menu from the given list of items. Choosing an item runs the command for that item.
-# Usage: menu "Please choose" "choice one,choice two with\, a comma,item three" "ls -al,cat \"This string\, has a comma\",command3"
+# Usage: 
+#   change_my_password="Change my password%passwd"
+#   list_users="List all users%cut -d: -f1 /etc/passwd"
+#   exit="kill -2 $$"
+#   menu "User management options:" "$change_my_password" "$list_users" "$exit"
 # Use up/down arrow keys to select a menu item, then press Enter. Or cancel with ESC.
-# Todo: the menu only works with one-word items and commands. maybe this is a problem with loading the arrays? it should work with multi-word items and commands.
 
 . colors
 
+if [ ${#} -lt 2 ]; then
+	mud-menu
+	exit 0
+fi
+
 description=$1
-#shift 1
-#parse items array
-IFS=',' read -r -a items <<< "$2"
-items=("${items[@]//\\,/,}")
+shift
+
+# Parse args. Each arg is "name%command"
 declare -a items
-#parse commands array
-IFS=',' read -r -a commands <<< "$3"
-commands=("${commands[@]//\\,/,}")
+# declare -a descriptions # not displayed so presently disabled
 declare -a commands
-
-#items=("$@")
-#commands=("${items[@]:3}")
-#items=("$2")
-#commands=("$3")
-#read -r -a items <<< "$2"
-#read -r -a commands <<< "$3"
+while [ ${#} -gt 0 ]; do
+	IFS='%' read -r -a option <<< "$1"
+    items+=("${option[0]}")
+    #descriptions+=("$(option[1])") # not displayed so presently disabled
+    commands+=("${option[1]}")
+    shift
+done
 
 selected=0
 displayed=0

spells/installers/setup-tor

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# Ask the user if they want to set up a hidden service
+read -p "Do you want to set up a Tor hidden service? [y/n]: " choice
+
+if [ "$choice" = "y" ]; then
+  # Detect the user's operating system
+  distro=$(detect-distro)
+
+  # Set the path to the Tor configuration file based on the operating system
+  if [ "$distro" = "arch" ]; then
+    tor_config_path="/etc/tor/torrc"
+  elif [ "$distro" = "debian" ]; then
+    tor_config_path="/etc/tor/torrc"
+  elif [ "$distro" = "fedora" ]; then
+    tor_config_path="/etc/tor/torrc"
+  elif [ "$distro" = "macos" ]; then
+    tor_config_path="/usr/local/etc/tor/torrc"
+  else
+    echo "Error: Unsupported operating system"
+    exit 1
+  fi
+
+  # Generate a new hidden service address
+  new_address=$(tor --quiet --hash-password mypassword | awk '{print $4}')
+
+  mud_dir="/var/lib/tor/mud/"
+
+  # Add the hidden service configuration to the Tor configuration file
+  echo "HiddenServiceDir $mud_dir" | sudo tee -a $tor_config_path
+  echo "HiddenServicePort 80 127.0.0.1:80" | sudo tee -a $tor_config_path
+  #echo "HiddenServiceAuthorizeClient stealth mypassword" | sudo tee -a $tor_config_path #obsolete
+
+  # Create the directory if it does not exist
+  mkdir -p $mud_dir
+
+  # Restart the tor service
+  if [ "$distro" = "arch" ]; then
+    sudo systemctl restart tor.service
+  elif [ "$distro" = "debian" ]; then
+    sudo service tor restart
+  elif [ "$distro" = "fedora" ]; then
+    sudo systemctl restart tor
+  elif [ "$distro" = "macos" ]; then
+    sudo brew services restart tor
+  fi
+
+  # Output the new hidden service address and path
+  echo "Your new hidden service address is: $new_address.onion"
+  echo "Your hidden service directory is located at: $mud_dir"
+
+else
+  echo "Exiting without setting up a hidden service."
+fi

spells/menu/mud-admin

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+# This spell displays the menu for adminning hosting a MUD server.
+
+. colors
+
+display_menu() {
+	add="Add authorized player%add-player"
+  list_players="List authorized players%new-player"
+  list_rooms="List shared rooms%list-rooms"
+  install="Install%mud-install-menu"
+  exit="Exit%kill -2 $$" # Commands are run with 'eval' by the menu script, so we can't simply say 'exit'. The keyword $$ gets this scripts PID and the -2 code is SIGINT aka Ctrl-C
+  
+  menu "MUD main menu:" "$change" "$new" "$install" "$exit"
+}
+
+# Catch Ctrl-C and exit
+handle_ctrl_c() {
+  trap 'echo exiting; exit' INT
+}
+
+handle_ctrl_c
+
+while true; do
+  display_menu
+done

spells/menu/mud-menu

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+# This spell displays the ao-mud main menu.
+
+. colors
+
+display_menu() {
+  look="Look Around%ls"
+  cast="Spellbook%spellbook"
+  home="Teleport Home%cd"
+  jump="Teleport to Marker%jump"
+  portal="Teleport to Portal Chamber%cd /mnt"
+  settings="MUD Settings%mud-settings"
+  exit="Exit%kill -2 $$" # Commands are run with 'eval' by the menu script, so we can't simply say 'exit'. The keyword $$ gets this scripts PID and the -2 code is SIGINT aka Ctrl-C
+  
+  menu "MUD main menu:" "$look" "$cast" "$home" "$jump" "$portal" "$settings" "$exit"
+}
+
+# Catch Ctrl-C and exit
+handle_ctrl_c() {
+  trap 'echo exiting; exit' INT
+}
+
+handle_ctrl_c
+
+while true; do
+  display_menu
+done

spells/menu/mud-settings

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+# This spell displays the ao-mud main menu.
+
+. colors
+
+display_menu() {
+	copy="Copy player key to clipboard%copy ~/.ssh/\$MUD_PLAYER.pub"
+	change="Change Player%select-player"
+  new="New Player%new-player"
+  install="Install%mud-install-menu"
+  exit="Exit%kill -2 $$" # Commands are run with 'eval' by the menu script, so we can't simply say 'exit'. The keyword $$ gets this scripts PID and the -2 code is SIGINT aka Ctrl-C
+  
+  menu "MUD main menu:" "$copy" "$change" "$new" "$install" "$exit"
+}
+
+# Catch Ctrl-C and exit
+handle_ctrl_c() {
+  trap 'echo exiting; exit' INT
+}
+
+handle_ctrl_c
+
+while true; do
+  display_menu
+done

spells/menu/network-menu

@@ -0,0 +1,115 @@
+
+
+configure_dhcp() {
+    # Ask for confirmation before proceeding
+    if ! ask_Yn "The spell of Dynamic Host Configuration Protocol will automatically configure your network settings based on the DHCP server. Would you like to proceed?"; then
+        return 1
+    fi
+
+    # Check if DHCP is already in use
+    if ip addr show | grep "dhclient" >/dev/null 2>&1 ; then
+        printf "DHCP is already in use.\n"
+        return 0
+    fi
+
+    # Backup the current network configuration
+    backup_file "/etc/network/interfaces"
+
+    # Configure the system to use DHCP
+    echo "auto lo" > /etc/network/interfaces
+    echo "iface lo inet loopback" >> /etc/network/interfaces
+    echo "auto eth0" >> /etc/network/interfaces
+    echo "iface eth0 inet dhcp" >> /etc/network/interfaces
+    service networking restart
+    printf "DHCP has been configured successfully.\n"
+}
+
+configure_static_ip() {
+    # Ask the user for the IP address, netmask, gateway, and DNS server
+    read -p "Enter the desired IP address: " ip_address
+    read -p "Enter the netmask (in CIDR notation, e.g. 24): " netmask
+    read -p "Enter the gateway IP: " gateway
+    read -p "Enter the DNS server IP: " dns_server
+
+    # Check if the static IP address is already configured
+    if ip addr show | grep -q "$ip_address/$netmask"; then
+        echo "The static IP address $ip_address/$netmask is already configured. Updating it."
+        # Delete the existing configuration
+        sudo ip addr del "$ip_address/$netmask" dev eth0
+    fi
+
+    # Add the new static IP address configuration
+    sudo ip addr add "$ip_address/$netmask" dev eth0
+
+    # Set the gateway
+    sudo ip route add default via "$gateway"
+
+    # Set the DNS server
+    sudo sed -i "s/^nameserver.*/nameserver $dns_server/" /etc/resolv.conf
+
+    echo "Static IP address configuration has been set to $ip_address/$netmask with gateway $gateway and DNS server $dns_server."
+}
+
+configure_dhcp() {
+    # Ask for confirmation before proceeding
+    ask_Yn "The spell of Dynamic Host Configuration Protocol will automatically configure your network settings based on the DHCP server. Would you like to proceed?"
+    if [ $? -ne 0 ]; then
+        return 1
+    fi
+
+    # Check if DHCP is already in use
+    ip addr show | grep "dhclient" &>/dev/null
+    if [ $? -eq 0 ]; then
+        echo -e "${RED}DHCP is already in use.${RESET}"
+        return 0
+    fi
+
+    # Backup the current network configuration
+    backup_file "/etc/network/interfaces"
+
+    # Configure the system to use DHCP
+    echo "auto lo" > /etc/network/interfaces
+    echo "iface lo inet loopback" >> /etc/network/interfaces
+    echo "auto eth0" >> /etc/network/interfaces
+    echo "iface eth0 inet dhcp" >> /etc/network/interfaces
+    service networking restart
+    echo -e "${GREEN}DHCP has been configured successfully.${RESET}"
+}
+
+display_menu() {
+  # Get the dimensions of the terminal window
+  window_width=$(tput cols)
+  window_height=$(tput lines)
+  
+  # Calculate the number of rows that the menu will occupy
+  num_rows=$(( ${#items[@]})) 
+  
+  # Calculate the position of the menu
+  menu_x=$((0))
+  menu_y=$(row)
+
+  # Clear the area of the screen where the menu will be drawn
+  clear_area $menu_x $menu_y $num_rows $window_width
+  
+  # Print the menu title
+  echo -en "\033[$menu_y;$((menu_x + (window_width / 2 - ${#title} / 2)))H$title"
+  
+  # Print the items and commands
+  for i in "${!items[@]}"; do
+    echo -en "\033[$((menu_y + i + 1));$((menu_x + 2))H ${items[$i]}"
+  done
+
+  # Highlight the selected item
+  echo -en "\033[$((menu_y + selected + 1));$((menu_x + 2))H ${CYAN}${items[$selected]}${RESET}"
+  
+  # Move the cursor to the selected item
+  echo -en "\033[$((menu_y + selected + 1));$((menu_x + 2))H"
+}
+
+display_menu() {
+    description="Please choose an option to configure your network settings"
+    options=("Configure static IP" "Configure DHCP" "Reset to DHCP" "Exit")
+    commands=("configure_static_ip" "configure_dhcp" "reset_dhcp" "exit")
+    menu "$description" "${options[@]}" "${commands[@]}"
+}
+

spells/menu/select-player

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+# check if the $MUD_PLAYER environment variable is set
+if [ -z "$MUD_PLAYER" ]; then
+    echo "MUD_PLAYER is not set."
+else
+    echo "MUD_PLAYER is currently set to $MUD_PLAYER"
+fi
+
+# get a list of player names from the ~/.ssh/ directory
+#options=()
+declare -a options
+for file in $(find ~/.ssh/ -name "*.pub"); do
+    player_name=$(basename "$file" ".pub")
+	options+=("$player_name%set-player $player_name")
+done
+options+=("Cancel%kill -2 $$")
+
+menu "Choose your player:" "${options[@]}"

spells/menu/users-menu

@@ -0,0 +1,37 @@
+#!/bin/sh
+
+# This script presents a menu of options for managing users on the system.
+
+. colors
+
+display_menu() {
+  change_my_password="Change my password%passwd"
+  list_users="List all users%cut -d: -f1 /etc/passwd"
+  change_other_password="Change other user's password%read -p \"Enter username: \" username; sudo passwd \$username"
+  view_my_groups="View my group memberships%groups"
+  view_other_groups="View other user's group membership%read -p \"Enter username: \" username; groups \$username"
+  list_groups="List all groups%cut -d: -f1 /etc/group"
+  create_group="Create new group%read -p \"Enter new group name: \" groupname; sudo groupadd \$groupname"
+  delete_group="Delete group%read -p \"Enter group to delete: \" groupname; sudo groupdel \$groupname"
+  join_group="Join group%read -p \"Enter group name to join: \" groupname; sudo usermod -a -G \$groupname \$USER"
+  leave_group="Leave group%read -p \"Enter group name to leave: \" group; sudo gpasswd -d \$USER \$group"
+  list_users_in_group="List users in group%read -p \"Enter group name to list members: \" group; getent group \$group"
+  add_user_to_group="Add other user to group%read -p \"Enter username: \" username; read -p \"Enter group name to add them to: \" group; sudo usermod -a -G \$group \$username"
+  remove_user_from_group="Remove other user from group%read -p \"Enter username: \" username; read -p \"Enter group to remove them from: \" group; sudo gpasswd -d \$username \$group"
+  create_user="Create new user%read -p \"Enter new username: \" username; sudo useradd \$username; printf \"Please remember to set a password for the new user with the 'Change other user's password' option.\""
+  delete_user="Delete user%read -p \"Enter username of user to delete: \" username; sudo userdel \$username"
+  exit="Exit%kill -2 $$" # $$ is my pid. Commands are run with 'eval' by the menu script, so we can't simply say 'exit'. The keyword $$ gets this scripts PID and the -2 code is SIGINT aka Ctrl-C
+  
+  menu "User management options:" "$change_my_password" "$list_users" "$change_other_password" "$view_my_groups" "$view_other_groups" "$list_groups" "$create_group" "$delete_group" "$join_group" "$leave_group" "$list_users_in_group" "$add_user_to_group" "$remove_user_from_group" "$create_user" "$delete_user" "$exit"
+}
+
+# Catch Ctrl-C and exit
+handle_ctrl_c() {
+  trap 'echo exiting; exit' INT
+}
+
+handle_ctrl_c
+
+while true; do
+  display_menu
+done

spells/new-player

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# Prompt user for player name
+echo "Enter a player name:"
+read player_name
+
+# Check if key files already exist
+if [ -f ~/.ssh/${player_name} ] && [ -f ~/.ssh/${player_name}.pub ]; then
+    echo "Key files for player ${player_name} already exist. Please enter a different player name:"
+    read player_name
+fi
+
+# Generate ssh key
+ssh-keygen -t rsa -b 4096 -C "${player_name}@MUD" -f ~/.ssh/${player_name} -q -N ""
+
+echo "New player ${player_name} created with ssh key files at ~/.ssh/${player_name} and ~/.ssh/${player_name}.pub"

spells/open-portal

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+# POSIX-compliant script for mounting a remote directory using sshfs over Tor
+
+# Check for required commands
+if ! command -v sshfs &> /dev/null; then
+    echo "Error: sshfs command not found. Please install sshfs and try again."
+    exit 1
+fi
+if ! command -v torify &> /dev/null; then
+    echo "Error: torify command not found. Please install tor and try again."
+    exit 1
+fi
+
+# Get player key
+if [ -z "$MUD_PLAYER" ]; then
+    echo "Error: MUD_PLAYER environment variable not set."
+    exit 1
+fi
+player_key="$HOME/.ssh/$MUD_PLAYER"
+
+# Get tor address and remote directory
+read -p "Enter the Tor address of the remote server (e.g. onion.example.com): " tor_address
+read -p "Enter the remote directory to mount (e.g. /mnt/remote): " remote_dir
+
+# Strip or add trailing slashes as required by sshfs
+remote_dir="${remote_dir%/}/"
+
+# Mount the remote directory using sshfs over tor
+torify sshfs -o IdentityFile="$player_key" "$tor_address:$remote_dir" "$remote_dir"

spells/open-teletype

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+# POSIX-compliant script for mounting a remote directory using sshfs over Tor
+
+# Check for required commands
+if ! command -v torify &> /dev/null; then
+    echo "Error: torify command not found. Please install tor and try again."
+    exit 1
+fi
+
+# Get player key
+if [ -z "$MUD_PLAYER" ]; then
+    echo "Error: MUD_PLAYER environment variable not set."
+    exit 1
+fi
+
+# Prompt user for tor address and remote directory
+echo "Enter the tor address:"
+read tor_address
+echo "Enter the remote directory:"
+read remote_dir
+
+# Strip or add trailing slashes as required
+remote_dir="${remote_dir%/}/"
+
+# Connect to remote directory via ssh through torify
+torify ssh -i ~/.ssh/$MUD_PLAYER "$tor_address:$remote_dir"

spells/set-player

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+# This spell sets the current player in the MUD using an environment variable.
+# You must source this script with ". ./set-player playername" to change it immediately (or open a new terminal window).
+
+player="$1"
+
+if [ -z "$player" ]; then
+    echo "Please provide a player name as an argument."
+    exit 1
+fi
+
+echo "Setting MUD_PLAYER to $player"
+
+# Remove any existing line setting MUD_PLAYER in .bashrc
+sed -i '/^export MUD_PLAYER/d' ~/.bashrc
+
+# Append new line to .bashrc to set MUD_PLAYER and export it
+echo "export MUD_PLAYER=$player" >> ~/.bashrc
+
+# Set MUD_PLAYER in current shell session
+export MUD_PLAYER="$player"

spells/users-menu

@@ -1,43 +0,0 @@
-# This script presents a menu of options for managing users on the system. The options available include:
-#  - Viewing the groups a user is in
-#  - Adding a user to a group
-#  - Changing a user's password
-#  - Creating a new user
-#  - Deleting an existing user
-#  - Exit the script
-
-. colors
-
-display_menu() {
-  options="Change my password,Change other user's password,View my group memberships,View other user's group membership,List all groups,Create new group,Delete group,Join group,Leave group,Add other user to group,Remove other user from group,Create new user,Delete user,Exit"
-  
-  view_my_groups="groups"
-  view_other_groups="read -p \"Enter username: \" username; groups \$username"
-  change_my_password="passwd"
-  change_other_password="read -p \"Enter username: \" username; sudo passwd \$username"
-  list_groups="cut -d: -f1 /etc/group"
-  create_group="read -p \"Enter new group name: \" groupname; sudo groupadd \$groupname"
-  delete_group="read -p \"Enter group to delete: \" groupname; sudo groupdel \$groupname"
-  join_group="read -p \"Enter group name to join: \" groupname; sudo usermod -a -G \$groupname \$USER"
-  leave_group="read -p \"Enter group name to leave: \" group; sudo gpasswd -d \$USER \$group"
-  add_user_to_group="read -p \"Enter username: \" username; read -p \"Enter group name to add  them to: \" group; sudo usermod -a -G \$group \$username"
-  remove_user_from_group="read -p \"Enter username: \" username; read -p \"Enter group to remove them from: \" group; sudo gpasswd -d \$username \$group"
-  create_user="read -p \"Enter new username: \" username; sudo useradd \$username; printf \"Please remember to set a password for the new user with the 'Change other user's password' option.\""
-  delete_user="read -p \"Enter username of user to delete: \" username; sudo userdel \$username"
-  my_pid=$$
-  exit="kill -2 $my_pid" # Commands are run with 'eval' by the menu script, so we can't simply say 'exit'. The keyword $$ gets this scripts PID and the -2 code is SIGINT aka Ctrl-C
-  
-  commands="$change_my_password,$change_other_password,$view_my_groups,$view_other_groups,$list_groups,$create_group,$delete_group,$join_group,$leave_group,$add_user_to_group,$remove_user_from_group,$create_user,$delete_user,$exit"
-  menu "User management options:" "$options" "$commands"
-}
-
-# Catch Ctrl-C and exit
-handle_ctrl_c() {
-  trap 'echo exiting; exit' INT
-}
-
-handle_ctrl_c
-
-while true; do
-  display_menu
-done

tutorials/00_terminal.sh

@@ -0,0 +1,36 @@
+#!/bin/sh
+
+# To make this script executable, use the command: chmod +x 00_terminal.sh
+# To run the script, use the command: ./00_terminal.sh
+echo "Welcome, neophyte, to the AO-MUD POSIX-compliant bash tutorial series!"
+echo "This spell will teach you some basic terminal tricks and keyboard shortcuts"
+echo "To study the code of the examples, please use the command: cat 23_terminal.sh"
+
+# Pressing up to get the last run command
+echo "To get the last run command, press the up arrow key"
+
+# Ctrl-R to search for commands
+echo "To search for a command in your command history, press Ctrl-R and type in a search term"
+
+# Entering multi-line input before running a command
+echo "To enter multi-line input before running a command, press Ctrl-X followed by Ctrl-E"
+
+# Moving the cursor around on the line
+echo "To move the cursor around on the line, use the left and right arrow keys"
+
+# Copying and pasting
+echo "To copy, use Ctrl-Shift-C. To paste, use Ctrl-Shift-V"
+
+#Clearing the terminal
+echo "To clear the terminal, press Ctrl + L"
+
+#Going to the beginning/end of a line
+echo "Press Home or End to move to the beginning or end of a line respectively"
+
+echo "Cast spell finished, check the code of the spell by using 'cat 23_terminal.sh' command"
+
+# Use !! to repeat the last command
+echo "To repeat the last command, use the command: !!"
+echo "For example, to repeat the last command with 'sudo', use: sudo !!"
+
+echo "Spell cast successfully!"