prosody
c9f9b3964bb9
plugins/mod_dialback.lua

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plugins/mod_dialback.lua @ 3061:c9f9b3964bb9

mod_saslauth: Allow the Cyrus SASL realm to be configurable
author Matthew Wild <mwild1@gmail.com>
date Thu, 20 May 2010 11:05:43 +0100
parent 2923:b7049746bd29
child 3533:0385b9f29049
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rev   line source
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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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b1885732e979 GPL->MIT!
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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
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10 local hosts = _G.hosts;
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11 local send_s2s = require "core.s2smanager".send_to_host;
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12 local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
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13 local s2s_initiate_dialback = require "core.s2smanager".initiate_dialback;
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14 local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
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15 local s2s_destroy_session = require "core.s2smanager".destroy_session;
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16
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17 local log = module._log;
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18
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19 local st = require "util.stanza";
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20
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21 local xmlns_stream = "http://etherx.jabber.org/streams";
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22 local xmlns_dialback = "jabber:server:dialback";
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23
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24 local dialback_requests = setmetatable({}, { __mode = 'v' });
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26 module:add_handler({"s2sin_unauthed", "s2sin"}, "verify", xmlns_dialback,
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27 function (origin, stanza)
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28 -- We are being asked to verify the key, to ensure it was generated by us
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29 origin.log("debug", "verifying that dialback key is ours...");
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30 local attr = stanza.attr;
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31 -- COMPAT: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34
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32 --if attr.from ~= origin.to_host then error("invalid-from"); end
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33 local type;
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34 if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then
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35 type = "valid"
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36 else
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37 type = "invalid"
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38 origin.log("warn", "Asked to verify a dialback key that was incorrect. An imposter is claiming to be %s?", attr.to);
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39 end
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40 origin.log("debug", "verified dialback key... it is %s", type);
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41 origin.sends2s(st.stanza("db:verify", { from = attr.to, to = attr.from, id = attr.id, type = type }):text(stanza[1]));
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42 end);
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43
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44 module:add_handler({ "s2sin_unauthed", "s2sin" }, "result", xmlns_dialback,
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45 function (origin, stanza)
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46 -- he wants to be identified through dialback
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47 -- We need to check the key with the Authoritative server
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48 local attr = stanza.attr;
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49 origin.hosts[attr.from] = { dialback_key = stanza[1] };
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50
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51 if not hosts[attr.to] then
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52 -- Not a host that we serve
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53 origin.log("info", "%s tried to connect to %s, which we don't serve", attr.from, attr.to);
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54 origin:close("host-unknown");
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55 return;
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56 end
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57
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58 dialback_requests[attr.from] = origin;
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59
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60 if not origin.from_host then
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61 -- Just used for friendlier logging
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62 origin.from_host = attr.from;
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63 end
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64 if not origin.to_host then
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65 -- Just used for friendlier logging
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66 origin.to_host = attr.to;
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67 end
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68
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69 origin.log("debug", "asking %s if key %s belongs to them", attr.from, stanza[1]);
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70 send_s2s(attr.to, attr.from,
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71 st.stanza("db:verify", { from = attr.to, to = attr.from, id = origin.streamid }):text(stanza[1]));
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72 end);
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73
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74 module:add_handler({ "s2sout_unauthed", "s2sout" }, "verify", xmlns_dialback,
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75 function (origin, stanza)
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76 local attr = stanza.attr;
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77 local dialback_verifying = dialback_requests[attr.from];
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78 if dialback_verifying then
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79 local valid;
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80 if attr.type == "valid" then
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81 s2s_make_authenticated(dialback_verifying, attr.from);
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82 valid = "valid";
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83 else
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84 -- Warn the original connection that is was not verified successfully
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85 log("warn", "authoritative server for "..(attr.from or "(unknown)").." denied the key");
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86 valid = "invalid";
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87 end
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88 if not dialback_verifying.sends2s then
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89 log("warn", "Incoming s2s session %s was closed in the meantime, so we can't notify it of the db result", tostring(dialback_verifying):match("%w+$"));
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90 else
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91 dialback_verifying.sends2s(
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92 st.stanza("db:result", { from = attr.to, to = attr.from, id = attr.id, type = valid })
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93 :text(dialback_verifying.hosts[attr.from].dialback_key));
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94 end
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95 dialback_requests[attr.from] = nil;
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96 end
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97 end);
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98
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99 module:add_handler({ "s2sout_unauthed", "s2sout" }, "result", xmlns_dialback,
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100 function (origin, stanza)
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101 -- Remote server is telling us whether we passed dialback
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102
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103 local attr = stanza.attr;
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104 if not hosts[attr.to] then
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105 origin:close("host-unknown");
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106 return;
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107 elseif hosts[attr.to].s2sout[attr.from] ~= origin then
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108 -- This isn't right
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109 origin:close("invalid-id");
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110 return;
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111 end
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112 if stanza.attr.type == "valid" then
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113 s2s_make_authenticated(origin, attr.from);
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114 else
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115 s2s_destroy_session(origin)
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116 end
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117 end);
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118
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119 module:hook_stanza(xmlns_stream, "features", function (origin, stanza)
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120 s2s_initiate_dialback(origin);
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121 return true;
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122 end, 100);
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123
9c700500f408 mod_dialback: Catch s2s-stream-features and add dialback feature
Matthew Wild <mwild1@gmail.com>
parents: 1876
diff changeset
124 -- Offer dialback to incoming hosts
9c700500f408 mod_dialback: Catch s2s-stream-features and add dialback feature
Matthew Wild <mwild1@gmail.com>
parents: 1876
diff changeset
125 module:hook("s2s-stream-features", function (data)
9c700500f408 mod_dialback: Catch s2s-stream-features and add dialback feature
Matthew Wild <mwild1@gmail.com>
parents: 1876
diff changeset
126 data.features:tag("dialback", { xmlns='urn:xmpp:features:dialback' }):tag("optional"):up():up();
9c700500f408 mod_dialback: Catch s2s-stream-features and add dialback feature
Matthew Wild <mwild1@gmail.com>
parents: 1876
diff changeset
127 end);