prosody
df4bd3af4099
plugins/mod_tls.lua

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plugins/mod_tls.lua @ 11519:df4bd3af4099

mod_tls: Bail out if session got destroyed while sending <proceed/> Can happen in case opportunistic_writes is enabled and the session got destroyed while writing that tag. Thanks Ge0rG
author Kim Alvefur <zash@zash.se>
date Thu, 15 Apr 2021 15:57:24 +0200
parent 11341:c567e5e2b77a
child 11530:a90389e7296c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1523
841d61be198f Remove version number from copyright headers
Matthew Wild <mwild1@gmail.com>
parents: 1219
diff changeset
1 -- Prosody IM
2923
b7049746bd29 Update copyright headers for 2010
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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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bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5698
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4 --
758
b1885732e979 GPL->MIT!
Matthew Wild <mwild1@gmail.com>
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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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cccd610a0ef9 Insert copyright/license headers
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7 --
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8
3571
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Matthew Wild <mwild1@gmail.com>
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9 local create_context = require "core.certmanager".create_context;
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10 local rawgetopt = require"core.configmanager".rawget;
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5b664c8fef86 forgot to commit mod_tls, oops :)
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11 local st = require "util.stanza";
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12
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edc63dc72566 mod_legacyauth, mod_saslauth, mod_tls: Pass require_encryption as default option to s2s_require_encryption so the later overrides the former
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13 local c2s_require_encryption = module:get_option("c2s_require_encryption", 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_initiate= st.stanza("starttls", starttls_attr);
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26 local starttls_proceed = st.stanza("proceed", starttls_attr);
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27 local starttls_failure = st.stanza("failure", starttls_attr);
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28 local c2s_feature = st.stanza("starttls", starttls_attr);
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29 local s2s_feature = st.stanza("starttls", starttls_attr);
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30 if c2s_require_encryption then c2s_feature:tag("required"):up(); end
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31 if s2s_require_encryption then s2s_feature:tag("required"):up(); end
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32
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33 local hosts = prosody.hosts;
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34 local host = hosts[module.host];
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35
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36 local ssl_ctx_c2s, ssl_ctx_s2sout, ssl_ctx_s2sin;
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37 local ssl_cfg_c2s, ssl_cfg_s2sout, ssl_cfg_s2sin;
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38 local err_c2s, err_s2sin, err_s2sout;
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39
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40 function module.load(reload)
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41 local NULL = {};
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42 local modhost = module.host;
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43 local parent = modhost:match("%.(.*)$");
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44
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45 local parent_ssl = rawgetopt(parent, "ssl") or NULL;
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46 local host_ssl = rawgetopt(modhost, "ssl") or parent_ssl;
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47
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48 local global_c2s = rawgetopt("*", "c2s_ssl") or NULL;
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49 local parent_c2s = rawgetopt(parent, "c2s_ssl") or NULL;
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50 local host_c2s = rawgetopt(modhost, "c2s_ssl") or parent_c2s;
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51
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52 local global_s2s = rawgetopt("*", "s2s_ssl") or NULL;
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53 local parent_s2s = rawgetopt(parent, "s2s_ssl") or NULL;
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54 local host_s2s = rawgetopt(modhost, "s2s_ssl") or parent_s2s;
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55
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56 module:log("debug", "Creating context for c2s");
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57 local request_client_certs = { verify = { "peer", "client_once", }; };
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58
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59 module:log("debug", "Creating context for s2sout");
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60 ssl_ctx_c2s, err_c2s, ssl_cfg_c2s = create_context(host.host, "server", host_c2s, host_ssl, global_c2s); -- for incoming client connections
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61 if not ssl_ctx_c2s then module:log("error", "Error creating context for c2s: %s", err_c2s); end
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62
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63 module:log("debug", "Creating context for s2sin");
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64 -- for outgoing server connections
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65 ssl_ctx_s2sout, err_s2sout, ssl_cfg_s2sout = create_context(host.host, "client", host_s2s, host_ssl, global_s2s, request_client_certs);
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66 if not ssl_ctx_s2sout then module:log("error", "Error creating contexts for s2sout: %s", err_s2sout); end
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67
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68 -- for incoming server connections
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69 ssl_ctx_s2sin, err_s2sin, ssl_cfg_s2sin = create_context(host.host, "server", host_s2s, host_ssl, global_s2s, request_client_certs);
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70 if not ssl_ctx_s2sin then module:log("error", "Error creating contexts for s2sin: %s", err_s2sin); end
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71
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72 if reload then
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73 module:log("info", "Certificates reloaded");
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74 else
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75 module:log("info", "Certificates loaded");
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76 end
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77 end
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78
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79 module:hook_global("config-reloaded", module.load);
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80
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81 local function can_do_tls(session)
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82 if not session.conn.starttls then
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83 if not session.secure then
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84 session.log("debug", "Underlying connection does not support STARTTLS");
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85 end
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86 return false;
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87 elseif session.ssl_ctx ~= nil then
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88 return session.ssl_ctx;
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89 end
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90 if session.type == "c2s_unauthed" then
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91 if not ssl_ctx_c2s and c2s_require_encryption then
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92 session.log("error", "No TLS context available for c2s. Earlier error was: %s", err_c2s);
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93 end
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94 session.ssl_ctx = ssl_ctx_c2s;
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95 session.ssl_cfg = ssl_cfg_c2s;
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96 elseif session.type == "s2sin_unauthed" and allow_s2s_tls then
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97 if not ssl_ctx_s2sin and s2s_require_encryption then
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98 session.log("error", "No TLS context available for s2sin. Earlier error was: %s", err_s2sin);
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99 end
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100 session.ssl_ctx = ssl_ctx_s2sin;
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101 session.ssl_cfg = ssl_cfg_s2sin;
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102 elseif session.direction == "outgoing" and allow_s2s_tls then
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103 if not ssl_ctx_s2sout and s2s_require_encryption then
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104 session.log("error", "No TLS context available for s2sout. Earlier error was: %s", err_s2sout);
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105 end
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106 session.ssl_ctx = ssl_ctx_s2sout;
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107 session.ssl_cfg = ssl_cfg_s2sout;
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108 else
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d8029b2e0f43 mod_tls: Log reasons for not being able to do TLS
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109 session.log("debug", "Unknown session type, don't know which TLS context to use");
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110 return false;
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111 end
7863
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diff changeset
112 if not session.ssl_ctx then
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113 session.log("debug", "Should be able to do TLS but no context available");
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114 return false;
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115 end
5685
f965ac6b7ce1 mod_tls: Refactor to allow separate SSL configuration for c2s and s2s connections
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parents: 5378
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116 return session.ssl_ctx;
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parents: 2923
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117 end
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parents: 2923
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118
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119 -- Hook <starttls/>
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120 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", function(event)
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parents: 2596
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121 local origin = event.origin;
2625
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parents: 2623
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122 if can_do_tls(origin) then
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parents: 2604
diff changeset
123 (origin.sends2s or origin.send)(starttls_proceed);
11519
df4bd3af4099 mod_tls: Bail out if session got destroyed while sending <proceed/>
Kim Alvefur <zash@zash.se>
parents: 11341
diff changeset
124 if origin.destroyed then return end
2600
1e6f3002e04f mod_tls: Inlined some code.
Waqas Hussain <waqas20@gmail.com>
parents: 2596
diff changeset
125 origin:reset_stream();
5685
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Kim Alvefur <zash@zash.se>
parents: 5378
diff changeset
126 origin.conn:starttls(origin.ssl_ctx);
4157
1b5a8e071a80 mod_tls: Drop 'TLS negotiation started for ...' to debug level from info
Matthew Wild <mwild1@gmail.com>
parents: 3583
diff changeset
127 origin.log("debug", "TLS negotiation started for %s...", origin.type);
2600
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parents: 2596
diff changeset
128 origin.secure = false;
2595
015934e20f03 mod_tls: Switched to new events API.
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parents: 2594
diff changeset
129 else
015934e20f03 mod_tls: Switched to new events API.
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parents: 2594
diff changeset
130 origin.log("warn", "Attempt to start TLS, but TLS is not available on this %s connection", origin.type);
2605
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parents: 2604
diff changeset
131 (origin.sends2s or origin.send)(starttls_failure);
2601
e64c6a4aa50b mod_tls: Respond with proper error when TLS cannot be negotiated.
Waqas Hussain <waqas20@gmail.com>
parents: 2600
diff changeset
132 origin:close();
2595
015934e20f03 mod_tls: Switched to new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 2594
diff changeset
133 end
015934e20f03 mod_tls: Switched to new events API.
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parents: 2594
diff changeset
134 return true;
015934e20f03 mod_tls: Switched to new events API.
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parents: 2594
diff changeset
135 end);
2932
d2816fb6c7ea mod_tls: Add s2s_allow_encryption option which, when set to false, disabled TLS for s2s
Matthew Wild <mwild1@gmail.com>
parents: 2923
diff changeset
136
2605
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parents: 2604
diff changeset
137 -- Advertize stream feature
2607
35a5d1c5ea28 mod_tls: Hook stream-features event using new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 2605
diff changeset
138 module:hook("stream-features", function(event)
35a5d1c5ea28 mod_tls: Hook stream-features event using new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 2605
diff changeset
139 local origin, features = event.origin, event.features;
2625
03287c06d986 mod_tls: Refactor to simplify detection of whether we can do TLS on a connection
Matthew Wild <mwild1@gmail.com>
parents: 2623
diff changeset
140 if can_do_tls(origin) then
2605
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Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
141 features:add_child(c2s_feature);
ade70495fe7f mod_tls: Cleanup.
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parents: 2604
diff changeset
142 end
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
143 end);
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
144 module:hook("s2s-stream-features", function(event)
2613
afa20941e098 s2smanager, mod_compression, mod_tls: Changed event.session to event.origin for s2s-stream-features event for consistency.
Waqas Hussain <waqas20@gmail.com>
parents: 2607
diff changeset
145 local origin, features = event.origin, event.features;
2625
03287c06d986 mod_tls: Refactor to simplify detection of whether we can do TLS on a connection
Matthew Wild <mwild1@gmail.com>
parents: 2623
diff changeset
146 if can_do_tls(origin) then
2605
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Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
147 features:add_child(s2s_feature);
ade70495fe7f mod_tls: Cleanup.
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parents: 2604
diff changeset
148 end
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
149 end);
1875
334383faf77b mod_tls: Advertise and handle TLS for s2s connections
Matthew Wild <mwild1@gmail.com>
parents: 1675
diff changeset
150
334383faf77b mod_tls: Advertise and handle TLS for s2s connections
Matthew Wild <mwild1@gmail.com>
parents: 1675
diff changeset
151 -- For s2sout connections, start TLS if we can
7959
3941d609ff85 mod_tls: Switch to hook_tag from hook_stanza which was renamed in 2087d42f1e77
Kim Alvefur <zash@zash.se>
parents: 7913
diff changeset
152 module:hook_tag("http://etherx.jabber.org/streams", "features", function (session, stanza)
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
153 module:log("debug", "Received features element");
11340
a7109eb45e30 mod_tls: Attempt STARTTLS even if not advertised as per RFC 7590
Kim Alvefur <zash@zash.se>
parents: 10784
diff changeset
154 if can_do_tls(session) then
a7109eb45e30 mod_tls: Attempt STARTTLS even if not advertised as per RFC 7590
Kim Alvefur <zash@zash.se>
parents: 10784
diff changeset
155 if stanza:get_child("starttls", xmlns_starttls) then
a7109eb45e30 mod_tls: Attempt STARTTLS even if not advertised as per RFC 7590
Kim Alvefur <zash@zash.se>
parents: 10784
diff changeset
156 module:log("debug", "%s is offering TLS, taking up the offer...", session.to_host);
11341
c567e5e2b77a mod_tls: Ignore lack of STARTTLS offer only when s2s_require_encryption set
Kim Alvefur <zash@zash.se>
parents: 11340
diff changeset
157 elseif s2s_require_encryption then
c567e5e2b77a mod_tls: Ignore lack of STARTTLS offer only when s2s_require_encryption set
Kim Alvefur <zash@zash.se>
parents: 11340
diff changeset
158 module:log("debug", "%s is *not* offering TLS, trying anyways!", session.to_host);
11340
a7109eb45e30 mod_tls: Attempt STARTTLS even if not advertised as per RFC 7590
Kim Alvefur <zash@zash.se>
parents: 10784
diff changeset
159 else
11341
c567e5e2b77a mod_tls: Ignore lack of STARTTLS offer only when s2s_require_encryption set
Kim Alvefur <zash@zash.se>
parents: 11340
diff changeset
160 module:log("debug", "%s is not offering TLS", session.to_host);
c567e5e2b77a mod_tls: Ignore lack of STARTTLS offer only when s2s_require_encryption set
Kim Alvefur <zash@zash.se>
parents: 11340
diff changeset
161 return;
11340
a7109eb45e30 mod_tls: Attempt STARTTLS even if not advertised as per RFC 7590
Kim Alvefur <zash@zash.se>
parents: 10784
diff changeset
162 end
6709
b6eff3ba13de mod_tls: Build <starttls/> as a stanza instead of with string concatenation
Kim Alvefur <zash@zash.se>
parents: 6526
diff changeset
163 session.sends2s(starttls_initiate);
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
164 return true;
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
165 end
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
166 end, 500);
1875
334383faf77b mod_tls: Advertise and handle TLS for s2s connections
Matthew Wild <mwild1@gmail.com>
parents: 1675
diff changeset
167
7959
3941d609ff85 mod_tls: Switch to hook_tag from hook_stanza which was renamed in 2087d42f1e77
Kim Alvefur <zash@zash.se>
parents: 7913
diff changeset
168 module:hook_tag(xmlns_starttls, "proceed", function (session, stanza) -- luacheck: ignore 212/stanza
7834
a2081d28bd22 mod_tls: Verify that TLS is available before proceeding
Kim Alvefur <zash@zash.se>
parents: 7833
diff changeset
169 if session.type == "s2sout_unauthed" and can_do_tls(session) then
7833
94c0c8649826 mod_tls: Only accept <proceed> on outgoing s2s connections
Kim Alvefur <zash@zash.se>
parents: 7712
diff changeset
170 module:log("debug", "Proceeding with TLS on s2sout...");
94c0c8649826 mod_tls: Only accept <proceed> on outgoing s2s connections
Kim Alvefur <zash@zash.se>
parents: 7712
diff changeset
171 session:reset_stream();
94c0c8649826 mod_tls: Only accept <proceed> on outgoing s2s connections
Kim Alvefur <zash@zash.se>
parents: 7712
diff changeset
172 session.conn:starttls(session.ssl_ctx);
94c0c8649826 mod_tls: Only accept <proceed> on outgoing s2s connections
Kim Alvefur <zash@zash.se>
parents: 7712
diff changeset
173 session.secure = false;
94c0c8649826 mod_tls: Only accept <proceed> on outgoing s2s connections
Kim Alvefur <zash@zash.se>
parents: 7712
diff changeset
174 return true;
94c0c8649826 mod_tls: Only accept <proceed> on outgoing s2s connections
Kim Alvefur <zash@zash.se>
parents: 7712
diff changeset
175 end
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
176 end);