prosody
66fb7b7c668d
plugins/mod_tls.lua

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plugins/mod_tls.lua @ 6296:66fb7b7c668d

mod_tls: Simplify and use new ssl config merging in certmanager
author Kim Alvefur <zash@zash.se>
date Thu, 03 Jul 2014 15:35:45 +0200
parent 5993:ef11b8bab405
child 6302:76699a0ae4c4
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rev   line source
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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 create_context = require "core.certmanager".create_context;
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10 local st = require "util.stanza";
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12 local c2s_require_encryption = module:get_option("c2s_require_encryption") or module:get_option("require_encryption");
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13 local s2s_require_encryption = module:get_option("s2s_require_encryption");
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14 local allow_s2s_tls = module:get_option("s2s_allow_encryption") ~= false;
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15 local s2s_secure_auth = module:get_option("s2s_secure_auth");
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16
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17 if s2s_secure_auth and s2s_require_encryption == false then
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18 module:log("warn", "s2s_secure_auth implies s2s_require_encryption, but s2s_require_encryption is set to false");
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19 s2s_require_encryption = true;
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20 end
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21
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22 local xmlns_starttls = 'urn:ietf:params:xml:ns:xmpp-tls';
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23 local starttls_attr = { xmlns = xmlns_starttls };
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24 local starttls_proceed = st.stanza("proceed", starttls_attr);
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25 local starttls_failure = st.stanza("failure", starttls_attr);
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26 local c2s_feature = st.stanza("starttls", starttls_attr);
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27 local s2s_feature = st.stanza("starttls", starttls_attr);
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28 if c2s_require_encryption then c2s_feature:tag("required"):up(); end
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29 if s2s_require_encryption then s2s_feature:tag("required"):up(); end
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30
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31 local hosts = prosody.hosts;
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32 local host = hosts[module.host];
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33
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34 local ssl_ctx_c2s, ssl_ctx_s2sout, ssl_ctx_s2sin;
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35 do
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36 local NULL, err = {};
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37 local global = module:context("*");
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38 local parent = module:context(module.host:match("%.(.*)$"));
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39
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40 local parent_ssl = parent:get_option("ssl");
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41 local host_ssl = module:get_option("ssl", parent_ssl);
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42
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43 local global_c2s = global:get_option("c2s_ssl", NULL);
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44 local parent_c2s = parent:get_option("c2s_ssl", NULL);
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45 local host_c2s = module:get_option("c2s_ssl", parent_c2s);
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46
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47 local global_s2s = global:get_option("s2s_ssl", NULL);
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48 local parent_s2s = parent:get_option("s2s_ssl", NULL);
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49 local host_s2s = module:get_option("s2s_ssl", parent_s2s);
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50
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51 ssl_ctx_c2s, err = create_context(host.host, "server", host_c2s, host_ssl, global_c2s); -- for incoming client connections
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52 if err then module:log("error", "Error creating context for c2s: %s", err); end
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53
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54 ssl_ctx_s2sin, err = create_context(host.host, "server", host_s2s, host_ssl, global_s2s); -- for incoming server connections
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55 ssl_ctx_s2sout = create_context(host.host, "client", host_s2s, host_ssl, global_s2s); -- for outgoing server connections
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56 if err then module:log("error", "Error creating context for s2s: %s", err); end -- Both would have the same issue
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57 end
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58
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59 local function can_do_tls(session)
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60 if not session.conn.starttls then
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61 return false;
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62 elseif session.ssl_ctx then
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63 return true;
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64 end
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65 if session.type == "c2s_unauthed" then
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66 session.ssl_ctx = ssl_ctx_c2s;
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67 elseif session.type == "s2sin_unauthed" and allow_s2s_tls then
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68 session.ssl_ctx = ssl_ctx_s2sin;
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69 elseif session.direction == "outgoing" and allow_s2s_tls then
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70 session.ssl_ctx = ssl_ctx_s2sout;
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71 else
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72 return false;
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73 end
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74 return session.ssl_ctx;
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75 end
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76
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77 -- Hook <starttls/>
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78 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", function(event)
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79 local origin = event.origin;
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80 if can_do_tls(origin) then
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81 (origin.sends2s or origin.send)(starttls_proceed);
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82 origin:reset_stream();
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83 origin.conn:starttls(origin.ssl_ctx);
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84 origin.log("debug", "TLS negotiation started for %s...", origin.type);
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85 origin.secure = false;
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86 else
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87 origin.log("warn", "Attempt to start TLS, but TLS is not available on this %s connection", origin.type);
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88 (origin.sends2s or origin.send)(starttls_failure);
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89 origin:close();
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90 end
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91 return true;
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92 end);
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93
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94 -- Advertize stream feature
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95 module:hook("stream-features", function(event)
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96 local origin, features = event.origin, event.features;
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97 if can_do_tls(origin) then
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98 features:add_child(c2s_feature);
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99 end
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100 end);
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101 module:hook("s2s-stream-features", function(event)
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102 local origin, features = event.origin, event.features;
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103 if can_do_tls(origin) then
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104 features:add_child(s2s_feature);
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105 end
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106 end);
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107
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108 -- For s2sout connections, start TLS if we can
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109 module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza)
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110 module:log("debug", "Received features element");
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111 if can_do_tls(session) and stanza:child_with_ns(xmlns_starttls) then
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112 module:log("debug", "%s is offering TLS, taking up the offer...", session.to_host);
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113 session.sends2s("<starttls xmlns='"..xmlns_starttls.."'/>");
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114 return true;
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115 end
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116 end, 500);
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117
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118 module:hook_stanza(xmlns_starttls, "proceed", function (session, stanza)
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
119 module:log("debug", "Proceeding with TLS on s2sout...");
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
120 session:reset_stream();
5685
f965ac6b7ce1 mod_tls: Refactor to allow separate SSL configuration for c2s and s2s connections
Kim Alvefur <zash@zash.se>
parents: 5378
diff changeset
121 session.conn:starttls(session.ssl_ctx);
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
122 session.secure = false;
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
123 return true;
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
124 end);