prosody
872ff4851c9b
plugins/mod_tls.lua

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plugins/mod_tls.lua @ 5976:872ff4851c9b 0.9.3

mod_tls: Log error when TLS initialization fails
author Matthew Wild <mwild1@gmail.com>
date Sun, 12 Jan 2014 06:16:49 -0500
parent 5378:ec3accda44d3
child 5978:d21ea6001bba
child 5987:bd90250ee1ee
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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 local config = require "core.configmanager";
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10 local create_context = require "core.certmanager".create_context;
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11 local st = require "util.stanza";
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12
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13 local secure_auth_only = module:get_option("c2s_require_encryption") or module:get_option("require_encryption");
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14 local secure_s2s_only = module:get_option("s2s_require_encryption");
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15 local allow_s2s_tls = module:get_option("s2s_allow_encryption") ~= false;
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16
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17 local xmlns_starttls = 'urn:ietf:params:xml:ns:xmpp-tls';
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18 local starttls_attr = { xmlns = xmlns_starttls };
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19 local starttls_proceed = st.stanza("proceed", starttls_attr);
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20 local starttls_failure = st.stanza("failure", starttls_attr);
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21 local c2s_feature = st.stanza("starttls", starttls_attr);
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22 local s2s_feature = st.stanza("starttls", starttls_attr);
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23 if secure_auth_only then c2s_feature:tag("required"):up(); end
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24 if secure_s2s_only then s2s_feature:tag("required"):up(); end
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25
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26 local global_ssl_ctx = prosody.global_ssl_ctx;
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27
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28 local hosts = prosody.hosts;
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29 local host = hosts[module.host];
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30
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31 local function can_do_tls(session)
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32 if session.type == "c2s_unauthed" then
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33 return session.conn.starttls and host.ssl_ctx_in;
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34 elseif session.type == "s2sin_unauthed" and allow_s2s_tls then
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35 return session.conn.starttls and host.ssl_ctx_in;
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36 elseif session.direction == "outgoing" and allow_s2s_tls then
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37 return session.conn.starttls and host.ssl_ctx;
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38 end
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39 return false;
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40 end
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41
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42 -- Hook <starttls/>
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43 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", function(event)
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44 local origin = event.origin;
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45 if can_do_tls(origin) then
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46 (origin.sends2s or origin.send)(starttls_proceed);
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47 origin:reset_stream();
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48 local host = origin.to_host or origin.host;
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49 local ssl_ctx = host and hosts[host].ssl_ctx_in or global_ssl_ctx;
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50 origin.conn:starttls(ssl_ctx);
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51 origin.log("debug", "TLS negotiation started for %s...", origin.type);
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52 origin.secure = false;
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53 else
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54 origin.log("warn", "Attempt to start TLS, but TLS is not available on this %s connection", origin.type);
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55 (origin.sends2s or origin.send)(starttls_failure);
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56 origin:close();
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57 end
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58 return true;
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59 end);
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60
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61 -- Advertize stream feature
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62 module:hook("stream-features", function(event)
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63 local origin, features = event.origin, event.features;
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64 if can_do_tls(origin) then
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65 features:add_child(c2s_feature);
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66 end
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67 end);
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68 module:hook("s2s-stream-features", function(event)
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69 local origin, features = event.origin, event.features;
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70 if can_do_tls(origin) then
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71 features:add_child(s2s_feature);
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72 end
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73 end);
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74
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75 -- For s2sout connections, start TLS if we can
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76 module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza)
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77 module:log("debug", "Received features element");
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78 if can_do_tls(session) and stanza:child_with_ns(xmlns_starttls) then
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79 module:log("debug", "%s is offering TLS, taking up the offer...", session.to_host);
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80 session.sends2s("<starttls xmlns='"..xmlns_starttls.."'/>");
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81 return true;
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82 end
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83 end, 500);
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84
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85 module:hook_stanza(xmlns_starttls, "proceed", function (session, stanza)
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86 module:log("debug", "Proceeding with TLS on s2sout...");
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87 session:reset_stream();
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88 local ssl_ctx = session.from_host and hosts[session.from_host].ssl_ctx or global_ssl_ctx;
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89 session.conn:starttls(ssl_ctx);
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90 session.secure = false;
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91 return true;
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92 end);
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93
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94 local function assert_log(ret, err)
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95 if not ret then
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96 module:log("error", "Unable to initialize TLS: %s", err);
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97 end
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98 return ret;
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99 end
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100
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101 function module.load()
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102 local ssl_config = config.rawget(module.host, "ssl");
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103 if not ssl_config then
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104 local base_host = module.host:match("%.(.*)");
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105 ssl_config = config.get(base_host, "ssl");
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106 end
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107 host.ssl_ctx = assert_log(create_context(host.host, "client", ssl_config)); -- for outgoing connections
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108 host.ssl_ctx_in = assert_log(create_context(host.host, "server", ssl_config)); -- for incoming connections
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109 end
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110
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111 function module.unload()
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112 host.ssl_ctx = nil;
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113 host.ssl_ctx_in = nil;
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114 end