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#!/usr/bin/ruby -Ku
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# http://www.ruby-doc.org/stdlib/libdoc/net/imap/rdoc/index.html
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# http://tmail.rubyforge.org/reference/index.html
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# http://tools.ietf.org/html/rfc3156
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$: << "./lib"
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require 'net/imap'
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require 'tmail'
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require 'tmail_extra'
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#require 'socket'
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#require 'fileutils'
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#require 'tempfile'
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require 'gpgme'
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require 'active_ldap'
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require 'shellwords'
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require 'cyborghood/base'
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require 'cyborghood/objects'
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#Socket.gethostname
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#
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# TODO:
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# - should be able to handle encrypted messages for user to send sensitive data (postman would need a GPG key too)
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#
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class CommandParser
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def self.run(user, txt, refs)
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txt.each_line do |line|
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line.chomp!
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sline = line.strip
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# skip empty lines and comments
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next if sline == "" or sline[0, 1] == "#"
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# stop processing when detecting message signature
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break if line == "-- "
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logger.info "Executing command: #{sline}"
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begin
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execute_cmd(user, sline)
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rescue
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logger.info "Command failed: " + $!
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end
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end
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end
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private
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def self.execute_cmd(user, cmdstr)
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cmdline = Shellwords.shellwords(cmdstr)
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subsys = cmdline.shift
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ok = true
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case subsys.upcase
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when "DNS"
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case cmdline.shift.upcase
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when "INFO"
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if cmdline.empty?
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list = DnsDomain.find_by_manager(user)
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logger.info "User is manager of the following zones: " + list.collect{|z| z.cn }.sort.join(", ")
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else
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ok = false
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end
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when "GET"
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case cmdline.shift.upcase
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when "ZONE"
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zone = cmdline.shift.downcase
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dom = DnsDomain.new(zone)
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logger.info "User requesting zone content for '#{zone}'"
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if dom.hosted?
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if dom.managed_by? user
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logger.info "User is manager of the zone"
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else
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logger.info "User is not allowed to manage the zone"
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end
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else
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logger.info "Zone not hosted"
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end
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else
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ok = false
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end
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when "SET"
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else
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ok = false
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end
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else
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ok = false
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end
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if not ok
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logger.info "Command not recognized: #{cmdstr}"
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end
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end
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end
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module CyborgHood
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# not yet ready to be a real Cyborg
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class Postman #< Cyborg
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def initialize
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# load config
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Config.load(self.human_name.downcase)
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@config = Config.instance
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ldap_config = @config.ldap
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ldap_config.logger = logger
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ActiveLdap::Base.establish_connection(ldap_config.marshal_dump)
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# setup logs
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unless @config.log.nil?
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logger.output_level(@config.log.console_level) unless @config.log.console_level.nil?
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logger.log_to_file(@config.log.file) unless @config.log.file.nil?
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end
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logger.info "Bot '#{self.human_name}' loaded"
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end
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def run
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# using SSL because TLS does not work in the NET::IMAP library
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#imap = Net::IMAP.new('imap.duckcorp.org', 993, true, "/etc/ssl/certs/duckcorp.crt", true)
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imap = Net::IMAP.new('localhost')
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logger.debug "Connected to IMAP server"
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logger.debug "IMAP Capabilities: " + imap.capability.join(", ")
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imap.authenticate('LOGIN', @config.imap.login, @config.imap.passwd)
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logger.debug "Logged into IMAP account"
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#p imap.getquotaroot("INBOX")
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imap.select('INBOX')
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imap.search(["ALL"], "UTF-8").each do |message_id|
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msg = imap.fetch(message_id, "RFC822")[0].attr["RFC822"]
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# unquote headers and transform into TMail object
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mail = TMail::Mail.parse(TMail::Unquoter.unquote_and_convert_to(msg, "UTF-8"))
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logger.set_prefix()
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logger.debug "######################################"
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logger.set_prefix("[#{mail.message_id}] ")
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logger.info "#{mail.from_addrs} -> #{mail.to_addrs}: #{mail.subject}"
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# ignore mails not signed
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unless mail.is_pgp_signed?
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logger.info "Mail not signed or not RFC3156 compliant"
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next
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end
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logger.debug "Proper signed content detected"
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sig_check = mail.verify_pgp_signature()
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if sig_check.status == 0
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logger.info "Mail content was properly signed by key #{sig_check.fingerprint}"
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user = Person.find_by_fingerprint(sig_check.fingerprint)
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if user.nil?
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logger.info "Mail is from an unknown person"
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else
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logger.info "Mail is from user #{user.uid} (#{user.cn})"
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signed_content = mail.pgp_signed_part()
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if signed_content.multipart?
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if signed_content.parts[0].content_type == "text/plain"
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command_txt = signed_content.parts[0].body
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command_refs = signed_content.parts.collect{|p| p.dup }
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end
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else
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command_txt = signed_content.body if signed_content.content_type == "text/plain"
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command_refs = []
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end
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if command_txt
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CommandParser.run(user, command_txt, command_refs)
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else
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logger.info "Mail does not contain a proper MIME part for commands"
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end
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end
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else
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logger.info "Mail content tampered or badly signed: " + sig_check.to_s
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end
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end
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imap.logout
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end
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def ask_to_stop
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end
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end
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end
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bot = CyborgHood::Postman.new
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trap('INT') do
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bot.ask_to_stop
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end
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trap('TERM') do
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bot.ask_to_stop
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end
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bot.run
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