module Msf

require 'msf/core/exploit/tcp'

###
#
# This module exposes methods that may be useful to exploits that deal with
# servers that speak the IMAP protocol.
#
###
module Exploit::Remote::Imap

	include Exploit::Remote::Tcp
	
	#
	# Creates an instance of an IMAP exploit module.
	#
	def initialize(info = {})
		super

		# Register the options that all IMAP exploits may make use of.
		register_options(
			[
				Opt::RHOST,
				Opt::RPORT(143),
				OptString.new('IMAPUSER', [ false, 'The username to authenticate as']),
				OptString.new('IMAPPASS', [ false, 'The password for the specified username'])
			], Msf::Exploit::Remote::Imap)
	end

	#
	# This method establishes a IMAP connection to host and port specified by
	# the RHOST and RPORT options, respectively.  After connecting, the banner
	# message is read in and stored in the 'banner' attribute.
	#
	def connect(global = true)
		print_status("Connecting to IMAP server #{rhost}:#{rport}...")

		fd = super
	
		# Wait for a banner to arrive...
		self.banner = fd.get_once

		print_status("Connected to target IMAP server.")
	
		# Return the file descriptor to the caller
		fd
	end

	#
	# Connect and login to the remote IMAP server using the credentials 
	# that have been supplied in the exploit options.
	#
	def connect_login(global = true)
		ftpsock = connect(global)


		if (not (user and pass))
			print_status("No username and password were supplied, unable to login")
			return false
		end

		print_status("Authenticating as #{user} with password #{pass}...")
		res = raw_send_recv("a001 LOGIN #{user} #{pass}\r\n")
		
		if (res !~ /^a001 OK/)
			print_status("Authentication failed")
			return false
		end

		return true
	end

	#
	# This method transmits an IMAP command and waits for a response.  If one is
	# received, it is returned to the caller.
	#
	def raw_send_recv(cmd, nsock = self.sock)
		nsock.put(cmd)
		nsock.get_once
	end

	
	##
	#
	# Wrappers for getters
	#
	##

	#
	# Returns the user string from the 'IMAPUSER' option.
	#
	def user
		datastore['IMAPUSER']
	end

	#
	# Returns the user string from the 'IMAPPASS' option.
	#
	def pass
		datastore['IMAPPASS']
	end

protected

	#
	# This attribute holds the banner that was read in after a successful call
	# to connect or connect_login.
	#
	attr_accessor :banner

end

end