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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Post
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Multi Manage the screensaver of the target computer',
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        'Description' => %q{
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          This module allows you to turn on or off the screensaver of the target computer and also
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          lock the current session.
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [ 'Eliott Teissonniere'],
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        'Platform' => [ 'linux', 'osx', 'win' ],
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        'SessionTypes' => [ 'shell', 'meterpreter' ],
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        'Actions' => [
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          [ 'LOCK', { 'Description' => 'Lock the current session' } ],
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          [ 'START', { 'Description' => 'Start the screensaver, may lock the current session' } ],
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          [ 'STOP', { 'Description' => 'Stop the screensaver, user may be prompted for its password' }]
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        ]
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      )
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    )
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  end
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  #
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  # cmd_exec but with some controls and verbosity
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  #
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  def cmd_vexec(cmd)
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    print_status("Executing '#{cmd}'")
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    begin
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      cmd_exec(cmd)
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    rescue EOFError
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      print_error('Command failed')
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      return false
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    end
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    true
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  end
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  def lock_session
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    case session.platform
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    when 'linux'
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      cmd_vexec('xdg-screensaver lock')
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    when 'osx'
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      cmd_vexec('pmset displaysleepnow')
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    when 'windows'
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      cmd_vexec('rundll32 user32.dll,LockWorkStation')
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    end
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    true
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  end
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  def start_screensaver
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    case session.platform
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    when 'linux'
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      cmd_vexec('xdg-screensaver activate')
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    when 'osx'
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      cmd_vexec('open -a ScreenSaverEngine')
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    when 'windows'
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      cmd_vexec('powershell -w hidden -nop -c "Start-Process C:\\Windows\\System32\\scrnsave.scr"')
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    end
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    true
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  end
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  def stop_screensaver
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    case session.platform
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    when 'linux'
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      cmd_vexec('xdg-screensaver reset')
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    when 'osx'
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      print_error('Not supported on Mac OSX, you can still lock the screen or start the screensaver')
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      return false
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    when 'windows'
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      print_error('Not supported on Windows, you can still lock the screen or start the screensaver')
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      return false
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    end
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    true
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  end
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  def run
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    if action.nil?
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      print_error('Please specify an action')
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    end
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    case action.name
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    when 'LOCK'
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      return lock_session
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    when 'START'
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      return start_screensaver
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    when 'STOP'
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      return stop_screensaver
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    end
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  end
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end
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