InitMate/InitMate.sh

#!/bin/bash

LOG_FILE="$(dirname "$0")/setup.log"

# Log function
log() {
    echo "$1" | tee -a "$LOG_FILE"
}

# Check if the script is run as root
if [ "$EUID" -ne 0 ]; then
    log "Please run as root"
    exit 1
fi

# Function to detect the OS and package manager
detect_os() {
    if [[ -f /etc/os-release ]]; then
        # shellcheck source=/dev/null
        source /etc/os-release
        OS=$ID
    else
        log "Unable to detect the operating system. Please enter it manually (e.g., ubuntu, debian, centos):"
        read -r OS
    fi

    case $OS in
        ubuntu|debian)
            PKG_MANAGER="apt"
            ;;
        centos|fedora)
            PKG_MANAGER="yum"
            ;;
        *)
            log "Unknown operating system. Please enter the package manager (e.g., apt, yum):"
            read -r PKG_MANAGER
            log "Please enter the command to update the package list (e.g., 'apt update && apt upgrade' or 'yum update'):"
            read -r UPDATE_CMD
            log "Please enter the command to install a package (e.g., 'apt install -y {package_name}' or 'yum install -y {package_name}'):"
            log "Do not include the {package_name} part, just the 'apt install -y' part"
            read -r INSTALL_CMD
            ;;
    esac
}

# Function to secure SSH
secure_ssh() {
    log "Securing SSH..."
    SSH_PORT=$((RANDOM % 64512 + 1024))
    log "New SSH port: $SSH_PORT"

    sed -i "s/#Port 22/Port $SSH_PORT/" /etc/ssh/sshd_config
    sed -i "s/PermitRootLogin yes/PermitRootLogin no/" /etc/ssh/sshd_config
    sed -i "s/#PasswordAuthentication yes/PasswordAuthentication no/" /etc/ssh/sshd_config
    sed -i "s/#PubkeyAuthentication yes/PubkeyAuthentication yes/" /etc/ssh/sshd_config

    log "Please enter your public key:"
    read -r PUBLIC_KEY

    mkdir -p ~/.ssh
    echo "$PUBLIC_KEY" > ~/.ssh/authorized_keys
    chmod 600 ~/.ssh/authorized_keys
    chmod 700 ~/.ssh

    systemctl restart sshd
}

# Function to setup firewall
setup_firewall() {
    if command -v ufw &>/dev/null; then
        log "UFW is already installed. Opening SSH port $SSH_PORT."
        ufw allow "$SSH_PORT"/tcp
    elif command -v firewall-cmd &>/dev/null; then
        log "Firewalld is already installed. Opening SSH port $SSH_PORT."
        firewall-cmd --permanent --add-port="$SSH_PORT"/tcp
        firewall-cmd --reload
    else
        log "No firewall detected. Do you want to install UFW? (yes/no)"
        read -r INSTALL_UFW
        if [[ $INSTALL_UFW == "yes" ]]; then
            if [[ $PKG_MANAGER == "apt" ]]; then
                apt update && apt install -y ufw
            elif [[ $PKG_MANAGER == "yum" ]]; then
                yum install -y ufw
            else
                $UPDATE_CMD && $INSTALL_CMD ufw
            fi
            ufw allow "$SSH_PORT"/tcp
            ufw enable
        fi
    fi

    log "Do you want to open additional ports? (yes/no)"
    read -r OPEN_PORTS
    if [[ $OPEN_PORTS == "yes" ]]; then
        log "Please enter the ports and protocols to open (comma-separated, e.g., 80/tcp,443/tcp,8080/udp):"
        read -r ADDITIONAL_PORTS
        IFS=',' read -r -a PORT_ARRAY <<< "$ADDITIONAL_PORTS"
        for PORT_PROTOCOL in "${PORT_ARRAY[@]}"; do
            IFS='/' read -r PORT PROTOCOL <<< "$PORT_PROTOCOL"
            if command -v ufw &>/dev/null; then
                ufw allow "$PORT/$PROTOCOL"
            elif command -v firewall-cmd &>/dev/null; then
                firewall-cmd --permanent --add-port="$PORT/$PROTOCOL"
            fi
        done
        if command -v firewall-cmd &>/dev/null; then
            firewall-cmd --reload
        fi
    fi
}

# Function to perform system update
system_update() {
    if [[ $PKG_MANAGER == "apt" ]]; then
        apt update && apt upgrade -y
    elif [[ $PKG_MANAGER == "yum" ]]; then
        yum update -y
    else
        $UPDATE_CMD && $INSTALL_CMD upgrade -y
    fi
}

# Function to run additional setup
run_additional_setup() {
    log "Do you want to run additional setup scripts? (yes/no)"
    read -r RUN_ADDITIONAL_SETUP
    if [[ $RUN_ADDITIONAL_SETUP == "yes" ]]; then
        SCRIPT_DIR=$(dirname "$0")
        if [[ -f "$SCRIPT_DIR/extender.sh" ]]; then
            bash "$SCRIPT_DIR/extender.sh" | tee -a "$LOG_FILE"
        else
            log "No extender.sh script found in the script directory."
        fi
    fi
}

# Function to add additional users
add_users() {
    log "Do you want to add additional users? (yes/no)"
    read -r ADD_USERS
    while [[ $ADD_USERS == "yes" ]]; do
        log "Enter the username:"
        read -r USERNAME
        log "Enter the password:"
        read -r -s PASSWORD
        useradd -m "$USERNAME"
        echo "$USERNAME:$PASSWORD" | chpasswd

        log "Do you want to grant sudo access to $USERNAME? (yes/no)"
        read -r GRANT_SUDO
        if [[ $GRANT_SUDO == "yes" ]]; then
            usermod -aG sudo "$USERNAME"
            log "$USERNAME has been granted sudo access."
        fi

        log "Do you want to add a public key for $USERNAME? (yes/no)"
        read -r ADD_PUBLIC_KEY
        if [[ $ADD_PUBLIC_KEY == "yes" ]]; then
            log "Please enter the public key:"
            read -r PUBLIC_KEY
            su - "$USERNAME" -c "mkdir -p ~/.ssh && echo '$PUBLIC_KEY' >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys && chmod 700 ~/.ssh"
            log "Public key added for $USERNAME."
        fi

        log "Do you want to add another user? (yes/no)"
        read -r ADD_USERS
    done
}

# Main script execution
detect_os
log "Detected OS: $OS, Package Manager: $PKG_MANAGER"
log "Is this correct? (yes/no)"
read -r CONFIRM
if [[ $CONFIRM != "yes" ]]; then
    log "Please enter the correct OS and package manager:"
    read -r OS PKG_MANAGER
    if [[ $PKG_MANAGER != "apt" && $PKG_MANAGER != "yum" ]]; then
        log "Please enter the command to update the package list (e.g., 'apt update' or 'yum update'):"
        read -r UPDATE_CMD
        log "Please enter the command to install a package (e.g., 'apt install -y' or 'yum install -y'):"
        read -r INSTALL_CMD
    fi
fi

log "Do you want to secure SSH? (yes/no)"
read -r SECURE_SSH
if [[ $SECURE_SSH == "yes" ]]; then
    secure_ssh
fi

log "Do you want to set up a firewall? (yes/no)"
read -r SETUP_FIREWALL
if [[ $SETUP_FIREWALL == "yes" ]]; then
    setup_firewall
fi

log "Do you want to perform a system update? (yes/no)"
read -r UPDATE_SYSTEM
if [[ $UPDATE_SYSTEM == "yes" ]]; then
    system_update
fi

log "Setup complete. Summary of actions performed:"
[[ $SECURE_SSH == "yes" ]] && log "- SSH secured on port $SSH_PORT"
[[ $SETUP_FIREWALL == "yes" ]] && log "- Firewall configured with SSH port $SSH_PORT"
[[ $UPDATE_SYSTEM == "yes" ]] && log "- System updated"

# Run additional setup if requested
run_additional_setup

# Add additional users if requested
add_users