prosody
1dbd06eedaa4
plugins/mod_component.lua

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plugins/mod_component.lua @ 4483:1dbd06eedaa4

util.xmppstream: Have faith in the XML parser matching start and end tags.
author Waqas Hussain <waqas20@gmail.com>
date Wed, 25 Jan 2012 11:49:27 +0500
parent 4464:b0574fc78a0a
child 4650:464ca74ddf6a
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 if module:get_host_type() ~= "component" then
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10 error("Don't load mod_component manually, it should be for a component, please see http://prosody.im/doc/components", 0);
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11 end
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12
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13 local t_concat = table.concat;
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14
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15 local sha1 = require "util.hashes".sha1;
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16 local st = require "util.stanza";
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17
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18 local log = module._log;
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19
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20 local main_session, send;
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21
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22 local function on_destroy(session, err)
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23 if main_session == session then
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24 connected = false;
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25 main_session = nil;
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26 send = nil;
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27 session.on_destroy = nil;
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28 end
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29 end
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31 local function handle_stanza(event)
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32 local stanza = event.stanza;
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33 if send then
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34 stanza.attr.xmlns = nil;
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35 send(stanza);
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36 else
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37 log("warn", "Component not connected, bouncing error for: %s", stanza:top_tag());
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38 if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
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39 event.origin.send(st.error_reply(stanza, "wait", "service-unavailable", "Component unavailable"));
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40 end
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41 end
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42 return true;
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43 end
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44
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45 module:hook("iq/bare", handle_stanza, -1);
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46 module:hook("message/bare", handle_stanza, -1);
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47 module:hook("presence/bare", handle_stanza, -1);
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48 module:hook("iq/full", handle_stanza, -1);
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49 module:hook("message/full", handle_stanza, -1);
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50 module:hook("presence/full", handle_stanza, -1);
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51 module:hook("iq/host", handle_stanza, -1);
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52 module:hook("message/host", handle_stanza, -1);
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53 module:hook("presence/host", handle_stanza, -1);
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54
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55 --- Handle authentication attempts by components
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56 function handle_component_auth(event)
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57 local session, stanza = event.origin, event.stanza;
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58
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59 if session.type ~= "component" then return; end
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60 if main_session == session then return; end
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61
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62 if (not session.host) or #stanza.tags > 0 then
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63 (session.log or log)("warn", "Invalid component handshake for host: %s", session.host);
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64 session:close("not-authorized");
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65 return true;
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66 end
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67
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68 local secret = module:get_option("component_secret");
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69 if not secret then
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70 (session.log or log)("warn", "Component attempted to identify as %s, but component_secret is not set", session.host);
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71 session:close("not-authorized");
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72 return true;
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73 end
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74
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75 local supplied_token = t_concat(stanza);
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76 local calculated_token = sha1(session.streamid..secret, true);
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77 if supplied_token:lower() ~= calculated_token:lower() then
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78 log("info", "Component authentication failed for %s", session.host);
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79 session:close{ condition = "not-authorized", text = "Given token does not match calculated token" };
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80 return true;
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81 end
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82
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83 -- If component not already created for this host, create one now
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84 if not main_session then
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85 connected = true;
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86 send = session.send;
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87 main_session = session;
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88 session.on_destroy = on_destroy;
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89 session.component_validate_from = module:get_option_boolean("validate_from_addresses", true);
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90 log("info", "Component successfully authenticated: %s", session.host);
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91 session.send(st.stanza("handshake"));
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92 else -- TODO: Implement stanza distribution
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93 log("error", "Multiple components bound to the same address, first one wins: %s", session.host);
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94 session:close{ condition = "conflict", text = "Component already connected" };
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95 end
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96
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97 return true;
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98 end
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99
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100 module:hook("stanza/jabber:component:accept:handshake", handle_component_auth);