Mercurial > prosody-modules

annotate mod_host_guard/mod_host_guard.lua @ 496:ceeb8b3056de

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mod_ircd: added channel modes' prefix declaration as some irc clients parse those to detect which mapping to use.
author Marco Cirillo <maranda@lightwitch.org>
date Mon, 05 Dec 2011 05:00:28 +0000
parents 376c4a90249c
children e98fe28c50b0
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1 -- (C) 2011, Marco Cirillo (LW.Org)
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2 -- Block or restrict by blacklist remote access to local components.
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3
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4 module:set_global()
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5
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6 local guard_blockall = module:get_option_set("host_guard_blockall", {})
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7 local guard_protect = module:get_option_set("host_guard_selective", {})
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8 local guard_block_bl = module:get_option_set("host_guard_blacklist", {})
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9
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10 local s2smanager = require "core.s2smanager";
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11 local config = require "core.configmanager";
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12 local nameprep = require "util.encodings".stringprep.nameprep;
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13
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14 local _make_connect = s2smanager.make_connect;
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15 function s2smanager.make_connect(session, connect_host, connect_port)
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16 if not session.s2sValidation then
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17 if guard_blockall:contains(session.from_host) or
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18 guard_block_bl:contains(session.to_host) and guard_protect:contains(session.from_host) then
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19 module:log("error", "remote service %s attempted to access restricted host %s", session.to_host, session.from_host);
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20 s2smanager.destroy_session(session, "You're not authorized, good bye.");
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21 return false;
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22 end
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23 end
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24 return _make_connect(session, connect_host, connect_port);
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25 end
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26
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27 local _stream_opened = s2smanager.streamopened;
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28 function s2smanager.streamopened(session, attr)
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29 local host = attr.to and nameprep(attr.to);
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30 local from = attr.from and nameprep(attr.from);
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31 if not from then
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32 session.s2sValidation = false;
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33 else
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34 session.s2sValidation = true;
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35 end
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36
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37 if guard_blockall:contains(host) or
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38 guard_block_bl:contains(from) and guard_protect:contains(host) then
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39 module:log("error", "remote service %s attempted to access restricted host %s", from, host);
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40 session:close({condition = "policy-violation", text = "You're not authorized, good bye."});
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41 return false;
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42 end
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43 _stream_opened(session, attr);
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44 end
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45
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46 local function sdr_hook (event)
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47 local origin, stanza = event.origin, event.stanza;
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48
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49 if origin.type == "s2sin" or origin.type == "s2sin_unauthed" then
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50 if guard_blockall:contains(stanza.attr.to) or
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51 guard_block_bl:contains(stanza.attr.from) and guard_protect:contains(stanza.attr.to) then
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52 module:log("error", "remote service %s attempted to access restricted host %s", stanza.attr.from, stanza.attr.to);
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53 origin:close({condition = "policy-violation", text = "You're not authorized, good bye."});
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54 return false;
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55 end
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56 end
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57
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58 return nil;
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59 end
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60
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61 local function handle_activation (host)
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62 if guard_blockall:contains(host) or guard_protect:contains(host) then
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63 if hosts[host] and hosts[host].events then
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64 hosts[host].events.add_handler("stanza/jabber:server:dialback:result", sdr_hook, 100);
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65 module:log ("debug", "adding host protection for: "..host);
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66 end
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67 end
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68 end
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69
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70 local function handle_deactivation (host)
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71 if guard_blockall:contains(host) or guard_protect:contains(host) then
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72 if hosts[host] and hosts[host].events then
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73 hosts[host].events.remove_handler("stanza/jabber:server:dialback:result", sdr_hook);
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74 module:log ("debug", "removing host protection for: "..host);
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75 end
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76 end
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77 end
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78
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79 local function reload()
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80 module:log ("debug", "server configuration reloaded, rehashing plugin tables...");
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81 guard_blockall = module:get_option_set("host_guard_blockall", {});
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82 guard_protect = module:get_option_set("host_guard_components", {});
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83 guard_block_bl = module:get_option_set("host_guard_blacklist", {});
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84 end
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85
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86 local function setup()
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87 module:log ("debug", "initializing host guard module...");
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88
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89 module:hook ("component-activated", handle_activation);
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90 module:hook ("component-deactivated", handle_deactivation);
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91 module:hook ("config-reloaded", reload);
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92
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93 for n,table in pairs(hosts) do
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94 if table.type == "component" then
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95 if guard_blockall:contains(n) or guard_protect:contains(n) then
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96 hosts[n].events.remove_handler("stanza/jabber:server:dialback:result", sdr_hook);
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97 handle_activation(n);
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98 end
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99 end
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100 end
456
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101 end
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102
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103 if prosody.start_time then
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104 setup();
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105 else
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106 prosody.events.add_handler("server-started", setup);
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107 end