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plugins/mod_dialback.lua @ 621:cd2cab5400fc
Add support for dialback piggy-backing. Fixes #37. Thanks to CShadowRun for helping me test :)
author | Matthew Wild <mwild1@gmail.com> |
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date | Sat, 13 Dec 2008 17:43:52 +0000 |
parent | 615:4ae3e81513f3 |
child | 645:d0a8ff9ba3e0 |
rev | line source |
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615 | 1 -- Prosody IM v0.2 |
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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 |
191 | 21 |
22 local send_s2s = require "core.s2smanager".send_to_host; | |
23 local s2s_make_authenticated = require "core.s2smanager".make_authenticated; | |
24 local s2s_verify_dialback = require "core.s2smanager".verify_dialback; | |
25 | |
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26 local st = require "util.stanza"; |
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27 |
191 | 28 local log = require "util.logger".init("mod_dialback"); |
29 | |
30 local xmlns_dialback = "jabber:server:dialback"; | |
31 | |
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32 local dialback_requests = setmetatable({}, { __mode = 'v' }); |
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33 |
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34 module:add_handler({"s2sin_unauthed", "s2sin"}, "verify", xmlns_dialback, |
219 | 35 function (origin, stanza) |
36 -- We are being asked to verify the key, to ensure it was generated by us | |
37 log("debug", "verifying dialback key..."); | |
38 local attr = stanza.attr; | |
39 -- FIXME: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34 | |
40 --if attr.from ~= origin.to_host then error("invalid-from"); end | |
41 local type; | |
42 if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then | |
43 type = "valid" | |
44 else | |
45 type = "invalid" | |
46 log("warn", "Asked to verify a dialback key that was incorrect. An imposter is claiming to be %s?", attr.to); | |
47 end | |
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48 log("debug", "verified dialback key... it is %s", type); |
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49 origin.sends2s(st.stanza("db:verify", { from = attr.to, to = attr.from, id = attr.id, type = type }):text(stanza[1])); |
219 | 50 end); |
191 | 51 |
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52 module:add_handler({ "s2sin_unauthed", "s2sin" }, "result", xmlns_dialback, |
219 | 53 function (origin, stanza) |
54 -- he wants to be identified through dialback | |
55 -- We need to check the key with the Authoritative server | |
56 local attr = stanza.attr; | |
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57 origin.hosts[attr.from] = { dialback_key = stanza[1] }; |
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58 |
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59 if not hosts[attr.to] then |
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60 -- Not a host that we serve |
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61 log("info", "%s tried to connect to %s, which we don't serve", attr.from, attr.to); |
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62 origin:close("host-unknown"); |
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63 return; |
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64 end |
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65 |
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66 dialback_requests[attr.from] = origin; |
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67 |
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68 if not origin.from_host then |
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69 -- Just used for friendlier logging |
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70 origin.from_host = attr.from; |
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71 end |
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72 if not origin.to_host then |
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73 -- Just used for friendlier logging |
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74 origin.to_host = attr.to; |
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75 end |
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76 |
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77 log("debug", "asking %s if key %s belongs to them", attr.from, stanza[1]); |
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78 send_s2s(attr.to, attr.from, |
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79 st.stanza("db:verify", { from = attr.to, to = attr.from, id = origin.streamid }):text(stanza[1])); |
219 | 80 end); |
191 | 81 |
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82 module:add_handler({ "s2sout_unauthed", "s2sout" }, "verify", xmlns_dialback, |
219 | 83 function (origin, stanza) |
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84 local attr = stanza.attr; |
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85 local dialback_verifying = dialback_requests[attr.from]; |
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86 if dialback_verifying then |
219 | 87 local valid; |
88 if attr.type == "valid" then | |
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89 s2s_make_authenticated(dialback_verifying, attr.from); |
219 | 90 valid = "valid"; |
91 else | |
92 -- Warn the original connection that is was not verified successfully | |
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93 log("warn", "authoritative server for "..(attr.from or "(unknown)").." denied the key"); |
219 | 94 valid = "invalid"; |
191 | 95 end |
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96 if not dialback_verifying.sends2s then |
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97 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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98 else |
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99 dialback_verifying.sends2s( |
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100 st.stanza("db:result", { from = attr.to, to = attr.from, id = attr.id, type = valid }) |
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101 :text(dialback_verifying.hosts[attr.from].dialback_key)); |
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102 end |
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103 dialback_requests[attr.from] = nil; |
219 | 104 end |
105 end); | |
191 | 106 |
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107 module:add_handler({ "s2sout_unauthed", "s2sout" }, "result", xmlns_dialback, |
219 | 108 function (origin, stanza) |
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109 -- Remote server is telling us whether we passed dialback |
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110 |
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111 local attr = stanza.attr; |
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112 if not hosts[attr.to] then |
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113 origin:close("host-unknown"); |
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114 return; |
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115 elseif hosts[attr.to].s2sout[attr.from] ~= origin then |
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116 -- This isn't right |
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117 origin:close("invalid-id"); |
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118 return; |
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119 end |
219 | 120 if stanza.attr.type == "valid" then |
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121 s2s_make_authenticated(origin, attr.from); |
219 | 122 else |
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123 -- FIXME: Waiting on #33 |
219 | 124 error("dialback failed!"); |
125 end | |
126 end); |