Automated merge with http://waqas.ath.cx/
[prosody.git] / plugins / mod_dialback.lua
1 -- Prosody IM v0.1
2 -- Copyright (C) 2008 Matthew Wild
3 -- Copyright (C) 2008 Waqas Hussain
4 -- 
5 -- This program is free software; you can redistribute it and/or
6 -- modify it under the terms of the GNU General Public License
7 -- as published by the Free Software Foundation; either version 2
8 -- of the License, or (at your option) any later version.
9 -- 
10 -- This program is distributed in the hope that it will be useful,
11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 -- GNU General Public License for more details.
14 -- 
15 -- You should have received a copy of the GNU General Public License
16 -- along with this program; if not, write to the Free Software
17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
18 --
19
20
21
22 local format = string.format;
23 local send_s2s = require "core.s2smanager".send_to_host;
24 local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
25 local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
26
27 local log = require "util.logger".init("mod_dialback");
28
29 local xmlns_dialback = "jabber:server:dialback";
30
31 module:add_handler({"s2sin_unauthed", "s2sin"}, "verify", xmlns_dialback,
32         function (origin, stanza)
33                 -- We are being asked to verify the key, to ensure it was generated by us
34                 log("debug", "verifying dialback key...");
35                 local attr = stanza.attr;
36                 -- FIXME: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34
37                 --if attr.from ~= origin.to_host then error("invalid-from"); end
38                 local type;
39                 if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then
40                         type = "valid"
41                 else
42                         type = "invalid"
43                         log("warn", "Asked to verify a dialback key that was incorrect. An imposter is claiming to be %s?", attr.to);
44                 end
45                 log("debug", "verifyied dialback key... it is %s", type);
46                 origin.sends2s(format("<db:verify from='%s' to='%s' id='%s' type='%s'>%s</db:verify>", attr.to, attr.from, attr.id, type, stanza[1]));
47         end);
48
49 module:add_handler("s2sin_unauthed", "result", xmlns_dialback,
50         function (origin, stanza)
51                 -- he wants to be identified through dialback
52                 -- We need to check the key with the Authoritative server
53                 local attr = stanza.attr;
54                 local attr = stanza.attr;
55                 origin.from_host = attr.from;
56                 origin.to_host = attr.to;
57                 origin.dialback_key = stanza[1];
58                 log("debug", "asking %s if key %s belongs to them", origin.from_host, origin.dialback_key);
59                 send_s2s(origin.to_host, origin.from_host,
60                         format("<db:verify from='%s' to='%s' id='%s'>%s</db:verify>", origin.to_host, origin.from_host,
61                                 origin.streamid, origin.dialback_key));
62                 hosts[origin.to_host].s2sout[origin.from_host].dialback_verifying = origin;
63         end);
64
65 module:add_handler({ "s2sout_unauthed", "s2sout" }, "verify", xmlns_dialback,
66         function (origin, stanza)
67                 if origin.dialback_verifying then
68                         local valid;
69                         local attr = stanza.attr;
70                         if attr.type == "valid" then
71                                 s2s_make_authenticated(origin.dialback_verifying);
72                                 valid = "valid";
73                         else
74                                 -- Warn the original connection that is was not verified successfully
75                                 log("warn", "dialback for "..(origin.dialback_verifying.from_host or "(unknown)").." failed");
76                                 valid = "invalid";
77                         end
78                         if not origin.dialback_verifying.sends2s then
79                                 log("warn", "Incoming s2s session %s was closed in the meantime, so we can't notify it of the db result", tostring(origin.dialback_verifying):match("%w+$"));
80                         else
81                                 origin.dialback_verifying.sends2s(format("<db:result from='%s' to='%s' id='%s' type='%s'>%s</db:result>",
82                                         attr.to, attr.from, attr.id, valid, origin.dialback_verifying.dialback_key));
83                         end
84                 end
85         end);
86
87 module:add_handler({ "s2sout_unauthed", "s2sout" }, "result", xmlns_dialback,
88         function (origin, stanza)
89                 if stanza.attr.type == "valid" then
90                         s2s_make_authenticated(origin);
91                 else
92                         -- FIXME
93                         error("dialback failed!");
94                 end
95         end);