prosody
0.9.5
plugins/mod_tls.lua

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plugins/mod_tls.lua @ 6366:8dee696c33cc 0.9.5

util.filters: Ignore filters being added twice (fixes issues on removal)
author Matthew Wild <mwild1@gmail.com>
date Thu, 28 Aug 2014 09:20:33 +0100
parent 5988:177f233b5211
child 5993:ef11b8bab405
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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diff changeset
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 c2s_require_encryption = module:get_option("c2s_require_encryption") or module:get_option("require_encryption");
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14 local s2s_require_encryption = 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 local s2s_secure_auth = module:get_option("s2s_secure_auth");
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17
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18 if s2s_secure_auth and s2s_require_encryption == false then
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19 module:log("warn", "s2s_secure_auth implies s2s_require_encryption, but s2s_require_encryption is set to false");
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20 s2s_require_encryption = true;
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21 end
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22
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23 local xmlns_starttls = 'urn:ietf:params:xml:ns:xmpp-tls';
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24 local starttls_attr = { xmlns = xmlns_starttls };
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25 local starttls_proceed = st.stanza("proceed", starttls_attr);
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26 local starttls_failure = st.stanza("failure", starttls_attr);
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27 local c2s_feature = st.stanza("starttls", starttls_attr);
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28 local s2s_feature = st.stanza("starttls", starttls_attr);
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29 if c2s_require_encryption then c2s_feature:tag("required"):up(); end
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30 if s2s_require_encryption then s2s_feature:tag("required"):up(); end
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31
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32 local global_ssl_ctx = prosody.global_ssl_ctx;
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33
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34 local hosts = prosody.hosts;
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35 local host = hosts[module.host];
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36
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37 local function can_do_tls(session)
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38 if session.type == "c2s_unauthed" then
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39 return session.conn.starttls and host.ssl_ctx_in;
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40 elseif session.type == "s2sin_unauthed" and allow_s2s_tls then
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41 return session.conn.starttls and host.ssl_ctx_in;
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42 elseif session.direction == "outgoing" and allow_s2s_tls then
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43 return session.conn.starttls and host.ssl_ctx;
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44 end
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45 return false;
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46 end
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47
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48 -- Hook <starttls/>
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49 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", function(event)
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50 local origin = event.origin;
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51 if can_do_tls(origin) then
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52 (origin.sends2s or origin.send)(starttls_proceed);
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53 origin:reset_stream();
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54 local host = origin.to_host or origin.host;
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55 local ssl_ctx = host and hosts[host].ssl_ctx_in or global_ssl_ctx;
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56 origin.conn:starttls(ssl_ctx);
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57 origin.log("debug", "TLS negotiation started for %s...", origin.type);
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58 origin.secure = false;
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59 else
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60 origin.log("warn", "Attempt to start TLS, but TLS is not available on this %s connection", origin.type);
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61 (origin.sends2s or origin.send)(starttls_failure);
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62 origin:close();
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63 end
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64 return true;
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65 end);
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66
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67 -- Advertize stream feature
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68 module:hook("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(c2s_feature);
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72 end
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73 end);
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74 module:hook("s2s-stream-features", function(event)
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75 local origin, features = event.origin, event.features;
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76 if can_do_tls(origin) then
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77 features:add_child(s2s_feature);
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78 end
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79 end);
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80
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81 -- For s2sout connections, start TLS if we can
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82 module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza)
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83 module:log("debug", "Received features element");
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84 if can_do_tls(session) and stanza:child_with_ns(xmlns_starttls) then
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85 module:log("debug", "%s is offering TLS, taking up the offer...", session.to_host);
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86 session.sends2s("<starttls xmlns='"..xmlns_starttls.."'/>");
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87 return true;
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88 end
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89 end, 500);
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90
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91 module:hook_stanza(xmlns_starttls, "proceed", function (session, stanza)
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92 module:log("debug", "Proceeding with TLS on s2sout...");
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93 session:reset_stream();
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94 local ssl_ctx = session.from_host and hosts[session.from_host].ssl_ctx or global_ssl_ctx;
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95 session.conn:starttls(ssl_ctx);
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96 session.secure = false;
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97 return true;
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98 end);
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99
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100 local function assert_log(ret, err)
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101 if not ret then
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102 module:log("error", "Unable to initialize TLS: %s", err);
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103 end
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104 return ret;
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105 end
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106
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107 function module.load()
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108 local ssl_config = config.rawget(module.host, "ssl");
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109 if not ssl_config then
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110 local base_host = module.host:match("%.(.*)");
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111 ssl_config = config.get(base_host, "ssl");
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112 end
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113 host.ssl_ctx = assert_log(create_context(host.host, "client", ssl_config)); -- for outgoing connections
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114 host.ssl_ctx_in = assert_log(create_context(host.host, "server", ssl_config)); -- for incoming connections
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115 end
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116
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117 function module.unload()
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118 host.ssl_ctx = nil;
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119 host.ssl_ctx_in = nil;
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120 end