prosody
5f77bbc1f04a
plugins/mod_dialback.lua

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plugins/mod_dialback.lua @ 688:5f77bbc1f04a

Automated merge with http://waqas.ath.cx:8000/
author Matthew Wild <mwild1@gmail.com>
date Fri, 09 Jan 2009 19:19:06 +0000
parent 645:d0a8ff9ba3e0
child 758:b1885732e979
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rev   line source
615
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1 -- Prosody IM v0.2
519
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2 -- Copyright (C) 2008 Matthew Wild
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3 -- Copyright (C) 2008 Waqas Hussain
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4 --
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5 -- This program is free software; you can redistribute it and/or
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6 -- modify it under the terms of the GNU General Public License
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7 -- as published by the Free Software Foundation; either version 2
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8 -- of the License, or (at your option) any later version.
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9 --
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10 -- This program is distributed in the hope that it will be useful,
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11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 -- GNU General Public License for more details.
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14 --
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15 -- You should have received a copy of the GNU General Public License
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16 -- along with this program; if not, write to the Free Software
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17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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18 --
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19
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20
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21
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22 local send_s2s = require "core.s2smanager".send_to_host;
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23 local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
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24 local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
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25 local s2s_destroy_session = require "core.s2smanager".destroy_session;
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26
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27 local st = require "util.stanza";
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28
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29 local log = require "util.logger".init("mod_dialback");
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30
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31 local xmlns_dialback = "jabber:server:dialback";
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32
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33 local dialback_requests = setmetatable({}, { __mode = 'v' });
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34
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35 module:add_handler({"s2sin_unauthed", "s2sin"}, "verify", xmlns_dialback,
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36 function (origin, stanza)
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37 -- We are being asked to verify the key, to ensure it was generated by us
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38 log("debug", "verifying dialback key...");
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39 local attr = stanza.attr;
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40 -- FIXME: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34
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41 --if attr.from ~= origin.to_host then error("invalid-from"); end
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42 local type;
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43 if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then
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44 type = "valid"
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45 else
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46 type = "invalid"
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47 log("warn", "Asked to verify a dialback key that was incorrect. An imposter is claiming to be %s?", attr.to);
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48 end
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49 log("debug", "verified dialback key... it is %s", type);
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50 origin.sends2s(st.stanza("db:verify", { from = attr.to, to = attr.from, id = attr.id, type = type }):text(stanza[1]));
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51 end);
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52
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53 module:add_handler({ "s2sin_unauthed", "s2sin" }, "result", xmlns_dialback,
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54 function (origin, stanza)
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55 -- he wants to be identified through dialback
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56 -- We need to check the key with the Authoritative server
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57 local attr = stanza.attr;
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58 origin.hosts[attr.from] = { dialback_key = stanza[1] };
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59
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60 if not hosts[attr.to] then
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61 -- Not a host that we serve
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62 log("info", "%s tried to connect to %s, which we don't serve", attr.from, attr.to);
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63 origin:close("host-unknown");
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64 return;
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65 end
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66
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67 dialback_requests[attr.from] = origin;
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68
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69 if not origin.from_host then
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70 -- Just used for friendlier logging
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71 origin.from_host = attr.from;
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72 end
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73 if not origin.to_host then
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74 -- Just used for friendlier logging
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75 origin.to_host = attr.to;
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76 end
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77
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78 log("debug", "asking %s if key %s belongs to them", attr.from, stanza[1]);
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79 send_s2s(attr.to, attr.from,
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80 st.stanza("db:verify", { from = attr.to, to = attr.from, id = origin.streamid }):text(stanza[1]));
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81 end);
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82
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83 module:add_handler({ "s2sout_unauthed", "s2sout" }, "verify", xmlns_dialback,
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84 function (origin, stanza)
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85 local attr = stanza.attr;
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86 local dialback_verifying = dialback_requests[attr.from];
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87 if dialback_verifying then
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88 local valid;
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89 if attr.type == "valid" then
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90 s2s_make_authenticated(dialback_verifying, attr.from);
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91 valid = "valid";
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92 else
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93 -- Warn the original connection that is was not verified successfully
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94 log("warn", "authoritative server for "..(attr.from or "(unknown)").." denied the key");
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95 valid = "invalid";
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96 end
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97 if not dialback_verifying.sends2s then
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98 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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99 else
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100 dialback_verifying.sends2s(
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101 st.stanza("db:result", { from = attr.to, to = attr.from, id = attr.id, type = valid })
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102 :text(dialback_verifying.hosts[attr.from].dialback_key));
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103 end
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104 dialback_requests[attr.from] = nil;
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105 end
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106 end);
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107
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108 module:add_handler({ "s2sout_unauthed", "s2sout" }, "result", xmlns_dialback,
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109 function (origin, stanza)
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110 -- Remote server is telling us whether we passed dialback
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111
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112 local attr = stanza.attr;
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113 if not hosts[attr.to] then
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114 origin:close("host-unknown");
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115 return;
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116 elseif hosts[attr.to].s2sout[attr.from] ~= origin then
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117 -- This isn't right
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118 origin:close("invalid-id");
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119 return;
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120 end
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121 if stanza.attr.type == "valid" then
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122 s2s_make_authenticated(origin, attr.from);
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123 else
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124 s2s_destroy_session(origin)
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125 end
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126 end);