#!/usr/bin/env ruby

require 'fileutils'
require 'json'
require 'net/http'
require 'net/https'
require 'open3'
require 'optparse'
require 'rex/socket'
require 'rex/text'
require 'sysrandom/securerandom'
require 'uri'
require 'yaml'

@script_name = File.basename(__FILE__)
@framework = File.expand_path(File.dirname(__FILE__))

@localconf = "#{ENV['HOME']}/.msf4"
@db = "#{@localconf}/db"
@db_conf = "#{@localconf}/database.yml"

@ws_tag = 'msf-ws'
@ws_conf = "#{@localconf}/#{@ws_tag}-config.ru"
@ws_ssl_key_default = "#{@localconf}/#{@ws_tag}-key.pem"
@ws_ssl_cert_default = "#{@localconf}/#{@ws_tag}-cert.pem"
@ws_log = "#{@localconf}/logs/#{@ws_tag}.log"
@ws_pid = "#{@localconf}/#{@ws_tag}.pid"

@current_user = ENV['LOGNAME'] || ENV['USERNAME'] || ENV['USER']
@msf_ws_user = (@current_user || "msfadmin").to_s.strip
@ws_generated_ssl = false
@ws_api_token = nil

@components = %w(database webservice)
@environments = %w(production development)

@options = {
    component: :all,
    debug: false,
    msf_db_name: 'msf',
    msf_db_user: 'msf',
    msftest_db_name: 'msftest',
    msftest_db_user: 'msftest',
    db_port: 5433,
    db_pool: 200,
    address: 'localhost',
    port: 8080,
    ssl: true,
    ssl_cert: @ws_ssl_cert_default,
    ssl_key: @ws_ssl_key_default,
    ssl_disable_verify: true,
    ws_env: ENV['RACK_ENV'] || 'production',
    retry_max: 10,
    retry_delay: 5.0,
    ws_user: nil
}


def run_cmd(cmd, input: nil, env: {})
  exitstatus = 0
  err = out = ""

  puts "run_cmd: cmd=#{cmd}, input=#{input}, env=#{env}" if @options[:debug]

  Open3.popen3(env, cmd) do |stdin, stdout, stderr, wait_thr|
    stdin.puts(input) if input
    if @options[:debug]
      err = stderr.read
      out = stdout.read
    end
    exitstatus = wait_thr.value.exitstatus
  end

  if exitstatus != 0
    if @options[:debug]
      puts "'#{cmd}' returned #{exitstatus}"
      puts out
      puts err
    end
  end

  exitstatus
end

def run_psql(cmd, db_name: 'postgres')
  if @options[:debug]
    puts "psql -p #{@options[:db_port]} -c \"#{cmd};\" #{db_name}"
  end

  run_cmd("psql -p #{@options[:db_port]} -c \"#{cmd};\" #{db_name}")
end

def pw_gen
  SecureRandom.base64(32)
end

def tail(file)
  begin
    File.readlines(file).last.to_s.strip
  rescue
    nil
  end
end

def status_db
  update_db_port

  if Dir.exist?(@db)
    if run_cmd("pg_ctl -o \"-p #{@options[:db_port]}\" -D #{@db} status") == 0
      puts "Database started at #{@db}"
    else
      puts "Database is not running at #{@db}"
    end
  else
    puts "No database found at #{@db}"
  end
end

def started_db
  if run_cmd("pg_ctl -o \"-p #{@options[:db_port]}\" -D #{@db} status") == 0
    puts "Database already started at #{@db}"
    return true
  end

  print "Starting database at #{@db}..."
  run_cmd("pg_ctl -o \"-p #{@options[:db_port]}\" -D #{@db} -l #{@db}/log start")
  sleep(2)
  if run_cmd("pg_ctl -o \"-p #{@options[:db_port]}\" -D #{@db} status") != 0
    puts 'failed'
    false
  else
    puts 'success'
    true
  end
end

def start_db
  if !Dir.exist?(@db)
    puts "No database found at #{@db}, not starting"
    return
  end

  update_db_port

  while !started_db
    last_log = tail("#{@db}/log")
    puts last_log
    fixed = false
    if last_log =~ /not compatible/
      puts 'Please attempt to upgrade the database manually using pg_upgrade.'
    end
    if !fixed
      if ask_yn('Your database may be corrupt, would you like to reinitialize it?')
        fixed = reinit_db
      end
    end
    if !fixed
      if !ask_yn('Database not started, try again?')
        return
      end
    end
  end
end

def stop_db
  update_db_port

  if run_cmd("pg_ctl -o \"-p #{@options[:db_port]}\" -D #{@db} status") == 0
    puts "Stopping database at #{@db}"
    run_cmd("pg_ctl -o \"-p #{@options[:db_port]}\" -D #{@db} stop")
  else
    puts "Database is no longer running at #{@db}"
  end
end

def restart_db
  stop_db
  start_db
end

def create_db
  puts "Creating database at #{@db}"
  Dir.mkdir(@db)
  run_cmd("initdb --auth-host=trust --auth-local=trust -E UTF8 #{@db}")

  File.open("#{@db}/postgresql.conf", 'a') do |f|
    f.puts "port = #{@options[:db_port]}"
  end
end

def init_db
  if Dir.exist?(@db)
    puts "Found a database at #{@db}, checking to see if it is started"
    start_db
    return
  end

  if File.exist?(@db_conf) &&
      !ask_yn("Found database config at #{@db_conf}, do you want to overwrite it?")
    if !load_db_config
      puts "Failed to load existing database config. Please reinit and overwrite the file."
      return
    end
  else
    write_db_config
  end

  create_db
  start_db

  puts 'Creating database users'
  run_psql("create user #{@options[:msf_db_user]} with password '#{@msf_pass}'")
  run_psql("create user #{@options[:msftest_db_user]} with password '#{@msftest_pass}'")
  run_psql("alter role #{@options[:msf_db_user]} createdb")
  run_psql("alter role #{@options[:msftest_db_user]} createdb")
  run_psql("alter role #{@options[:msf_db_user]} with password '#{@msf_pass}'")
  run_psql("alter role #{@options[:msftest_db_user]} with password '#{@msftest_pass}'")
  run_cmd("createdb -p #{@options[:db_port]} -O #{@options[:msf_db_user]} -h 127.0.0.1 -U #{@options[:msf_db_user]} -E UTF-8 -T template0 #{@options[:msf_db_name]}",
          input: "#{@msf_pass}\n#{@msf_pass}\n")
  run_cmd("createdb -p #{@options[:db_port]} -O #{@options[:msftest_db_user]} -h 127.0.0.1 -U #{@options[:msftest_db_user]} -E UTF-8 -T template0 #{@options[:msftest_db_name]}",
          input: "#{@msftest_pass}\n#{@msftest_pass}\n")

  write_db_client_auth_config
  restart_db

  puts 'Creating initial database schema'
  Dir.chdir(@framework) do
    run_cmd('bundle exec rake db:migrate')
  end
end

def load_db_config
  if File.file?(@db_conf)
    config = YAML.load(File.read(@db_conf))

    production = config['production']
    if production.nil?
      puts "No production section found in database config #{@db_conf}."
      return false
    end

    test = config['test']
    if test.nil?
      puts "No test section found in database config #{@db_conf}."
      return false
    end

    # get values for development and production
    @options[:msf_db_name] = production['database']
    @options[:msf_db_user] = production['username']
    @msf_pass = production['password']
    @options[:db_port] = production['port']
    @options[:db_pool] = production['pool']

    # get values for test
    @options[:msftest_db_name] = test['database']
    @options[:msftest_db_user] = test['username']
    @msftest_pass = test['password']
    return true
  end

  return false
end

def write_db_config
  # Generate new database passwords if not already assigned
  @msf_pass ||= pw_gen
  @msftest_pass ||= pw_gen

  # Write a default database config file
  Dir.mkdir(@localconf) unless File.directory?(@localconf)
  File.open(@db_conf, 'w') do |f|
    f.puts <<~EOF
      development: &pgsql
        adapter: postgresql
        database: #{@options[:msf_db_name]}
        username: #{@options[:msf_db_user]}
        password: #{@msf_pass}
        host: 127.0.0.1
        port: #{@options[:db_port]}
        pool: #{@options[:db_pool]}

      production: &production
        <<: *pgsql

      test:
        <<: *pgsql
        database: #{@options[:msftest_db_name]}
        username: #{@options[:msftest_db_user]}
        password: #{@msftest_pass}
    EOF
  end

  File.chmod(0640, @db_conf)
end

def write_db_client_auth_config
  client_auth_config = "#{@db}/pg_hba.conf"
  puts "Writing client authentication configuration file #{client_auth_config}"
  File.open(client_auth_config, 'w') do |f|
    f.puts "host    \"#{@options[:msf_db_name]}\"      \"#{@options[:msf_db_user]}\"      127.0.0.1/32           md5"
    f.puts "host    \"#{@options[:msftest_db_name]}\"  \"#{@options[:msftest_db_user]}\"  127.0.0.1/32           md5"
    f.puts "host    \"postgres\"  \"#{@options[:msftest_db_user]}\"  127.0.0.1/32           md5"
    f.puts "host    \"template1\"   all                127.0.0.1/32           trust"
    if Gem.win_platform?
      f.puts "host    all             all                127.0.0.1/32           trust"
      f.puts "host    all             all                ::1/128                trust"
    else
      f.puts "local   all             all                                       trust"
    end
  end
end

def update_db_port
  if File.file?(@db_conf)
    config = YAML.load(File.read(@db_conf))
    if config["production"] && config["production"]["port"]
      port = config["production"]["port"]
      if port != @options[:db_port]
        puts "Using database port #{port} found in #{@db_conf}"
        @options[:db_port] = port
      end
    end
  end
end

def ask_yn(question)
  loop do
    print "#{question}: "
    yn = STDIN.gets
    case yn
    when /^[Yy]/
      return true
    when /^[Nn]/
      return false
    else
      puts 'Please answer yes or no.'
    end
  end
end

def ask_value(question, default_value)
  print "#{question}[#{default_value}]: "
  input = STDIN.gets.strip
  if input.nil? || input.empty?
    return default_value
  else
    return input
  end
end


def delete_db
  if Dir.exist?(@db)
    stop_db

    if ask_yn("Delete all data at #{@db}?")
      puts "Deleting all data at #{@db}"
      FileUtils.rm_rf(@db)
    end

    if File.file?(@db_conf) && ask_yn("Delete database configuration at #{@db_conf}?")
      File.delete(@db_conf)
    end
  else
    puts "No data at #{@db}, doing nothing"
  end
end

def reinit_db
  delete_db
  init_db
end

def status_web_service
  if File.file?(@ws_pid)
    ws_pid = tail(@ws_pid)
    if ws_pid.nil? || !process_active?(ws_pid.to_i)
      puts "MSF web service is not running: PID file found at #{@ws_pid}, but no active process running as PID #{ws_pid}"
    else
      puts "MSF web service is running as PID #{ws_pid}"
    end
  else
    puts "MSF web service is not running: no PID file found at #{@ws_pid}"
  end
end

def init_web_service
  if File.file?(@ws_conf)
    puts "Found web service config at #{@ws_conf}, checking to see if it is started"
    start_web_service(expect_auth: true)
    return
  end

  if @options[:ws_user].nil?
    @msf_ws_user = ask_value('Initial MSF web service account username?', @msf_ws_user)
  else
    @msf_ws_user = @options[:ws_user]
  end

  # Write a default Rack config file for the web service
  Dir.mkdir(@localconf) unless File.directory?(@localconf)
  # TODO: free the REST API from all of these requirements
  File.open(@ws_conf, 'w') do |f|
    f.puts <<~EOF
      # #{File.basename(@ws_conf)}
      # created on: #{Time.now.utc}

      @framework_path = '#{@framework}'
      $LOAD_PATH << @framework_path unless $LOAD_PATH.include?(@framework_path)

      require File.expand_path('./config/boot', @framework_path)
      require 'metasploit/framework/parsed_options/remote_db'
      require 'msf/core/db_manager/http/metasploit_api_app'

      def require_environment!(parsed_options)
        # RAILS_ENV must be set before requiring 'config/application.rb'
        parsed_options.environment!
        ARGV.replace(parsed_options.positional)

        # allow other Rails::Applications to use this command
        if !defined?(Rails) || Rails.application.nil?
          # @see https://github.com/rails/rails/blob/v3.2.17/railties/lib/rails/commands.rb#L39-L40
          require File.expand_path('./config/application', @framework_path)
        end

        # have to configure before requiring environment because
        # config/environment.rb calls initialize! and the initializers will use
        # the configuration from the parsed options.
        parsed_options.configure(Rails.application)

        Rails.application.require_environment!
      end

      parsed_options = Metasploit::Framework::ParsedOptions::RemoteDB.new
      require_environment!(parsed_options)

      run MetasploitApiApp
    EOF
  end
  File.chmod(0640, @ws_conf)

  if @options[:ssl] && ((!File.file?(@options[:ssl_key]) || !File.file?(@options[:ssl_cert])) ||
      (@options[:ssl_key] == @ws_ssl_key_default && @options[:ssl_cert] == @ws_ssl_cert_default))
    generate_web_service_ssl(key: @options[:ssl_key], cert: @options[:ssl_cert])
  end

  if start_web_service(expect_auth: false)
    if add_web_service_workspace && add_web_service_user
      output_web_service_information
    else
      puts 'Failed to complete MSF web service configuration, please reinitialize.'
      stop_web_service
    end
  end
end

def start_web_service(expect_auth: true)
  unless File.file?(@ws_conf)
    puts "No MSF web service configuration found at #{@ws_conf}, not starting"
    return false
  end

  # check if MSF web service is already started
  if File.file?(@ws_pid)
    ws_pid = tail(@ws_pid)
    if ws_pid.nil? || !process_active?(ws_pid.to_i)
      puts "MSF web service PID file found, but no active process running as PID #{ws_pid}"
      puts "Deleting MSF web service PID file #{@ws_pid}"
      File.delete(@ws_pid)
    else
      puts "MSF web service is already running as PID #{ws_pid}"
      return false
    end
  end

  # daemonize MSF web service
  puts 'Attempting to start MSF web service...'
  if run_cmd("#{thin_cmd} start") == 0
    # wait until web service is online
    retry_count = 0
    response_data = web_service_online_check(expect_auth: expect_auth)
    is_online = response_data[:state] != :offline
    while !is_online && retry_count < @options[:retry_max]
      retry_count += 1
      if @options[:debug]
        puts "MSF web service doesn't appear to be online. Sleeping #{@options[:retry_delay]}s until check #{retry_count}/#{@options[:retry_max]}"
      end
      sleep(@options[:retry_delay])
      response_data = web_service_online_check(expect_auth: expect_auth)
      is_online = response_data[:state] != :offline
    end

    if response_data[:state] == :online
      puts 'MSF web service started and online'
      return true
    elsif response_data[:state] == :error
      puts 'MSF web service appears to be started, but may not operate as expected.'
      puts "#{response_data[:message]}"
    else
      puts 'MSF web service does not appear to be started.'
    end
    puts "Please see #{@ws_log} for additional details."
    return false
  else
    puts 'Failed to start MSF web service'
    return false
  end
end

def stop_web_service
  ws_pid = tail(@ws_pid)
  if ws_pid.nil? || !process_active?(ws_pid.to_i)
    puts 'MSF web service is no longer running'
    if File.file?(@ws_pid)
      puts "Deleting MSF web service PID file #{@ws_pid}"
      File.delete(@ws_pid)
    end
  else
    puts "Stopping MSF web service PID #{ws_pid}"
    run_cmd("#{thin_cmd} stop")
  end
end

def restart_web_service
  stop_web_service
  start_web_service
end

def delete_web_service
  stop_web_service
  if File.file?(@ws_conf) && ask_yn("Delete MSF web service configuration at #{@ws_conf}?")
    File.delete(@ws_conf)
  end
end

def reinit_web_service
  delete_web_service
  init_web_service
end

def generate_web_service_ssl(key:, cert:)
  @ws_generated_ssl = true
  if (File.file?(key) || File.file?(cert)) &&
      !ask_yn("Either MSF web service SSL key #{key} or certificate #{cert} already exist, overwrite both?")
    return
  end

  puts 'Generating SSL key and certificate for MSF web service'
  # @ssl_cert = Rex::Socket::SslTcpServer.ssl_generate_certificate
  @ssl_key, @ssl_cert, @ssl_extra_chain_cert = Rex::Socket::Ssl.ssl_generate_certificate

  # write PEM format key and certificate
  mode = 'wb'
  mode_int = 0600
  File.open(key, mode) { |f| f.write(@ssl_key.to_pem) }
  File.chmod(mode_int, key)

  File.open(cert, mode) { |f| f.write(@ssl_cert.to_pem) }
  File.chmod(mode_int, cert)
end

def web_service_online_check(expect_auth:)
  msf_version_uri = get_web_service_uri(path: '/api/v1/msf/version')
  response_data = http_request(uri: msf_version_uri, method: :get,
                          skip_verify: skip_ssl_verify?, cert: get_ssl_cert)

  if !response_data[:exception].nil? && response_data[:exception].is_a?(Errno::ECONNREFUSED)
    response_data[:state] = :offline
  elsif !response_data[:exception].nil? && response_data[:exception].is_a?(OpenSSL::OpenSSLError)
    response_data[:state] = :error
    response_data[:message] = 'Detected an SSL issue. Please set the same options used to initialize the web service or reinitialize.'
  elsif !response_data[:response].nil? && response_data[:response].dig(:error, :code) == 401
    if expect_auth
      response_data[:state] = :online
    else
      response_data[:state] = :error
      response_data[:message] = 'MSF web service expects authentication. If you wish to reinitialize the web service account you will need to reinitialize the database.'
    end
  elsif !response_data[:response].nil? && !response_data[:response].dig(:data, :metasploit_version).nil?
    response_data[:state] = :online
  else
    response_data[:state] = :error
  end

  puts "web_service_online: expect_auth=#{expect_auth}, response_msg=#{response_data}" if @options[:debug]
  response_data
end

def add_web_service_workspace(name: 'default')
  # Send request to create new workspace
  workspace_data = { name: name }
  workspaces_uri = get_web_service_uri(path: '/api/v1/workspaces')
  response_data = http_request(uri: workspaces_uri, data: workspace_data, method: :post,
                               skip_verify: skip_ssl_verify?, cert: get_ssl_cert)
  response = response_data[:response]
  puts "add_web_service_workspace: add workspace response=#{response}" if @options[:debug]
  if response.nil? || response.dig(:data, :name) != name
    puts "Error creating MSF web service workspace '#{name}'"
    return false
  end
  return true
end

def add_web_service_user
  puts "Creating MSF web service user #{@msf_ws_user}"

  # Generate new web service user password
  msf_ws_pass = pw_gen
  cred_data = { username: @msf_ws_user, password: msf_ws_pass }

  # Send request to create new admin user
  user_data = cred_data.merge({ admin: true })
  user_uri = get_web_service_uri(path: '/api/v1/users')
  response_data = http_request(uri: user_uri, data: user_data, method: :post,
                          skip_verify: skip_ssl_verify?, cert: get_ssl_cert)
  response = response_data[:response]
  puts "add_web_service_user: create user response=#{response}" if @options[:debug]
  if response.nil? || response.dig(:data, :username) != @msf_ws_user
    puts "Error creating MSF web service user #{@msf_ws_user}"
    return false
  end
  puts "\nMSF web service username: #{@msf_ws_user}"
  puts "MSF web service password: #{msf_ws_pass}"

  # Send request to create new API token for the user
  generate_token_uri = get_web_service_uri(path: '/api/v1/auth/generate-token')
  response_data = http_request(uri: generate_token_uri, query: cred_data, method: :get,
                          skip_verify: skip_ssl_verify?, cert: get_ssl_cert)
  response = response_data[:response]
  puts "add_web_service_user: generate token response=#{response}" if @options[:debug]
  if response.nil? || (@ws_api_token = response.dig(:data, :token)).nil?
    puts 'Error creating MSF web service user API token'
    return false
  end
  puts "MSF web service user API token: #{@ws_api_token}"
  puts 'Please store these credentials securely.'
  return true
end

def output_web_service_information
  puts ''
  puts 'MSF web service configuration complete'
  puts 'Connect to the data service in msfconsole using the command:'
  puts "#{get_db_connect_command}"
  puts ''
  puts 'The username and password are credentials for the API account:'
  puts "#{get_web_service_uri(path: '/api/v1/auth/account')}"
  puts ''

  persist_data_service
end

def persist_data_service
  if ask_yn('Add data service connection to local msfconsole and persist as default?')
    data_service_name = "local-#{@options[:ssl] ? 'https' : 'http'}-data-service"
    data_service_name = ask_value('Data service connection name?', data_service_name)
    # execute msfconsole commands to add and persist the data service connection
    connect_cmd = get_db_connect_command(name: data_service_name)
    cmd = "msfconsole -qx \"#{connect_cmd}; db_save; exit\""
    if run_cmd(cmd) != 0
      # attempt to execute msfconsole in the current working directory
      if run_cmd(cmd, env: {'PATH' => ".:#{ENV["PATH"]}"}) != 0
        puts 'Failed to run msfconsole and persist the data service connection'
      end
    end
  end
end

def get_db_connect_command(name: nil)
  # build db_connect command based on install options
  connect_cmd = "db_connect"
  connect_cmd << " --name #{name}" unless name.nil?
  connect_cmd << " --token #{@ws_api_token}"
  connect_cmd << " --cert #{@options[:ssl_cert]}" if @options[:ssl]
  connect_cmd << " --skip-verify" if skip_ssl_verify?
  connect_cmd << " #{get_web_service_uri}"
  connect_cmd
end

def get_web_service_uri(path: nil)
  uri_class = @options[:ssl] ? URI::HTTPS : URI::HTTP
  uri_class.build({host: get_web_service_host, port: @options[:port], path: path})
end

def get_web_service_host
  # user specified any address INADDR_ANY (0.0.0.0), return a routable address
  @options[:address] == '0.0.0.0' ? 'localhost' : @options[:address]
end

def skip_ssl_verify?
  @ws_generated_ssl || @options[:ssl_disable_verify]
end

def get_ssl_cert
  @options[:ssl] ? @options[:ssl_cert] : nil
end

def thin_cmd
  server_opts = "--rackup #{@ws_conf} --address #{@options[:address]} --port #{@options[:port]}"
  ssl_opts = @options[:ssl] ? "--ssl --ssl-key-file #{@options[:ssl_key]} --ssl-cert-file #{@options[:ssl_cert]}" : ''
  ssl_opts << ' --ssl-disable-verify' if skip_ssl_verify?
  adapter_opts = "--environment #{@options[:ws_env]}"
  daemon_opts = "--daemonize --log #{@ws_log} --pid #{@ws_pid} --tag #{@ws_tag}"
  all_opts = [server_opts, ssl_opts, adapter_opts, daemon_opts].reject(&:empty?).join(' ')

  "thin #{all_opts}"
end

def process_active?(pid)
  begin
    Process.kill(0, pid)
    true
  rescue Errno::ESRCH
    false
  end
end

def http_request(uri:, query: nil, data: nil, method: :get, headers: nil, skip_verify: false, cert: nil)
  all_headers = { 'User-Agent': @script_name }
  all_headers.merge!(headers) unless headers.nil?
  query_str = (!query.nil? && !query.empty?) ? URI.encode_www_form(query.compact) : nil
  uri.query = query_str

  http = Net::HTTP.new(uri.host, uri.port)
  if uri.is_a?(URI::HTTPS)
    http.use_ssl = true
    if skip_verify
      http.verify_mode = OpenSSL::SSL::VERIFY_NONE
    else
      # https://stackoverflow.com/questions/22093042/implementing-https-certificate-pubkey-pinning-with-ruby
      http.verify_mode = OpenSSL::SSL::VERIFY_PEER
      user_passed_cert = OpenSSL::X509::Certificate.new(File.read(cert))

      http.verify_callback = lambda do |preverify_ok, cert_store|
        server_cert = cert_store.chain[0]
        return true unless server_cert.to_der == cert_store.current_cert.to_der
        same_public_key?(server_cert, user_passed_cert)
      end
    end
  end

  begin
    response_data = { response: nil }
    case method
      when :get
        request = Net::HTTP::Get.new(uri.request_uri, initheader=all_headers)
      when :post
        request = Net::HTTP::Post.new(uri.request_uri, initheader=all_headers)
      else
        raise Exception, "Request method #{method} is not handled"
    end

    request.content_type = 'application/json'
    unless data.nil?
      json_body = data.to_json
      request.body = json_body
    end

    response = http.request(request)
    unless response.body.nil? || response.body.empty?
      response_data[:response] = JSON.parse(response.body, symbolize_names: true)
    end
  rescue => e
    response_data[:exception] = e
    puts "Problem with HTTP #{method} request #{uri.request_uri}, message: #{e.message}" if @options[:debug]
  end

  response_data
end

# Tells us whether the private keys on the passed certificates match
# and use the same algo
def same_public_key?(ref_cert, actual_cert)
  pkr, pka = ref_cert.public_key, actual_cert.public_key

  # First check if the public keys use the same crypto...
  return false unless pkr.class == pka.class
  # ...and then - that they have the same contents
  return false unless pkr.to_pem == pka.to_pem

  true
end

def parse_args(args)
  subtext = <<~USAGE
    Commands:
      init     initialize the component
      reinit   delete and reinitialize the component
      delete   delete and stop the component
      status   check component status
      start    start the component
      stop     stop the component
      restart  restart the component
  USAGE

  parser = OptionParser.new do |opts|
    opts.banner = "Usage: #{@script_name} [options] <command>"
    opts.separator('Manage a Metasploit Framework database and web service')
    opts.separator('')
    opts.separator('General Options:')
    opts.on('--component COMPONENT', @components + ['all'], 'Component used with provided command (default: all)',
            "  (#{@components.join(', ')})") { |component|
      @options[:component] = component.to_sym
    }

    opts.on('-d', '--debug', 'Enable debug output') { |d| @options[:debug] = d }
    opts.on('-h', '--help', 'Show this help message') {
      puts opts
      exit
    }

    opts.separator('')
    opts.separator('Database Options:')
    opts.on('--msf-db-name NAME', "Database name (default: #{@options[:msf_db_name]})") { |n|
      @options[:msf_db_name] = n
    }

    opts.on('--msf-db-user-name USER', "Database username (default: #{@options[:msf_db_user]})") { |u|
      @options[:msf_db_user] = u
    }

    opts.on('--msf-test-db-name NAME', "Test database name (default: #{@options[:msftest_db_name]})") { |n|
      @options[:msftest_db_name] = n
    }

    opts.on('--msf-test-db-user-name USER', "Test database username (default: #{@options[:msftest_db_user]})") { |u|
      @options[:msftest_db_user] = u
    }

    opts.on('--db-port PORT', Integer, "Database port (default: #{@options[:db_port]})") { |p|
      @options[:db_port] = p
    }

    opts.on('--db-pool MAX', Integer, "Database connection pool size (default: #{@options[:db_pool]})") { |m|
      @options[:db_pool] = m
    }

    opts.separator('')
    opts.separator('Web Service Options:')
    opts.on('-a', '--address ADDRESS',
            "Bind to host address (default: #{@options[:address]})") { |a|
      @options[:address] = a
    }

    opts.on('-p', '--port PORT', Integer,
            "Web service port (default: #{@options[:port]})") { |p|
      @options[:port] = p
    }

    opts.on('--[no-]ssl', "Enable SSL (default: #{@options[:ssl]})") { |s| @options[:ssl] = s }

    opts.on('--ssl-key-file PATH', "Path to private key (default: #{@options[:ssl_key]})") { |p|
      @options[:ssl_key] = p
    }

    opts.on('--ssl-cert-file PATH', "Path to certificate (default: #{@options[:ssl_cert]})") { |p|
      @options[:ssl_cert] = p
    }

    opts.on('--[no-]ssl-disable-verify',
            "Disables (optional) client cert requests (default: #{@options[:ssl_disable_verify]})") { |v|
      @options[:ssl_disable_verify] = v
    }

    opts.on('--environment ENV', @environments,
            "Web service framework environment (default: #{@options[:ws_env]})",
            "  (#{@environments.join(', ')})") { |e|
      @options[:ws_env] = e
    }

    opts.on('--retry-max MAX', Integer,
            "Maximum number of web service connect attempts (default: #{@options[:retry_max]})") { |m|
      @options[:retry_max] = m
    }

    opts.on('--retry-delay DELAY', Float,
            "Delay in seconds between web service connect attempts (default: #{@options[:retry_delay]})") { |d|
      @options[:retry_delay] = d
    }

    opts.on('--user USER', 'Initial web service admin username') { |u|
      @options[:ws_user] = u
    }

    opts.separator('')
    opts.separator(subtext)
  end

  parser.parse!(args)

  if args.length != 1
    puts parser
    abort
  end

  @options
end

def invoke_command(commands, component, command)
  method = commands[component][command]
  if !method.nil?
    send(method)
  else
    puts "Error: unrecognized command '#{command}' for #{component}"
  end
end



if $PROGRAM_NAME == __FILE__
  # Bomb out if we're root
  if !Gem.win_platform? && Process.uid.zero?
    puts "Please run #{@script_name} as a non-root user"
    abort
  end

  # map component commands to methods
  commands = {
      database: {
          init: :init_db,
          reinit: :reinit_db,
          delete: :delete_db,
          status: :status_db,
          start: :start_db,
          stop: :stop_db,
          restart: :restart_db
      },
      webservice: {
          init: :init_web_service,
          reinit: :reinit_web_service,
          delete: :delete_web_service,
          status: :status_web_service,
          start: :start_web_service,
          stop: :stop_web_service,
          restart: :restart_web_service
      }
  }

  parse_args(ARGV)

  command = ARGV[0].to_sym
  if @options[:component] == :all
    @components.each { |component|
      invoke_command(commands, component.to_sym, command)
    }
  else
    invoke_command(commands, @options[:component], command)
  end
end