prosody
b7552b1e267d
plugins/mod_tls.lua

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plugins/mod_tls.lua @ 1903:b7552b1e267d

mod_tls: Only advertise TLS if the server told us which host they are connecting to
author Matthew Wild <mwild1@gmail.com>
date Mon, 05 Oct 2009 10:10:53 +0100
parent 1896:e7ac9be5c90c
child 1910:14c043d7fb77
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 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 local st = require "util.stanza";
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10
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11 local xmlns_stream = 'http://etherx.jabber.org/streams';
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12 local xmlns_starttls = 'urn:ietf:params:xml:ns:xmpp-tls';
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14 local secure_auth_only = module:get_option("require_encryption");
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15
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16 module:add_handler("c2s_unauthed", "starttls", xmlns_starttls,
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17 function (session, stanza)
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18 if session.conn.starttls then
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19 session.send(st.stanza("proceed", { xmlns = xmlns_starttls }));
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20 session:reset_stream();
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21 session.conn.starttls();
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22 session.log("info", "TLS negotiation started...");
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23 session.secure = false;
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24 else
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25 -- FIXME: What reply?
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26 session.log("warn", "Attempt to start TLS, but TLS is not available on this connection");
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27 end
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28 end);
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29
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30 module:add_handler("s2sin_unauthed", "starttls", xmlns_starttls,
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31 function (session, stanza)
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32 if session.conn.starttls then
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33 session.sends2s(st.stanza("proceed", { xmlns = xmlns_starttls }));
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34 session:reset_stream();
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35 session.conn.starttls();
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36 session.log("info", "TLS negotiation started for incoming s2s...");
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37 else
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38 -- FIXME: What reply?
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39 session.log("warn", "Attempt to start TLS, but TLS is not available on this s2s connection");
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40 end
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41 end);
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42
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43
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44 local starttls_attr = { xmlns = xmlns_starttls };
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45 module:add_event_hook("stream-features",
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46 function (session, features)
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47 if session.conn.starttls then
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48 features:tag("starttls", starttls_attr);
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49 if secure_auth_only then
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50 features:tag("required"):up():up();
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51 else
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52 features:up();
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53 end
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54 end
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55 end);
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56
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57 module:add_event_hook("s2s-stream-features",
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58 function (session, features)
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59 -- This hook is possibly called once per host (at least if the
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60 -- remote server does not specify a to/from.
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61 if session.to_host and session.conn.starttls and not features:child_with_ns(xmlns_starttls) then
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62 features:tag("starttls", starttls_attr):up();
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63 -- TODO: Make this optional :P
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64 --features:tag("required"):up():up();
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65 end
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66 end);
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67
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68 -- For s2sout connections, start TLS if we can
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69 module:hook_stanza(xmlns_stream, "features",
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70 function (session, stanza)
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71 module:log("debug", "Received features element");
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72 if stanza:child_with_ns(xmlns_starttls) then
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73 module:log("%s is offering TLS, taking up the offer...", session.to_host);
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74 session.sends2s("<starttls xmlns='"..xmlns_starttls.."'/>");
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75 return true;
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76 end
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77 end, 500);
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78
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79 module:hook_stanza(xmlns_starttls, "proceed",
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80 function (session, stanza)
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81 module:log("debug", "Proceeding with TLS on s2sout...");
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82 local format, to_host, from_host = string.format, session.to_host, session.from_host;
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83 session:reset_stream();
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84 session.conn.starttls(true);
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85 return true;
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86 end);