Annotate

plugins/mod_tls.lua @ 12446:e54b8a5e35ad 0.12

util.random: Test whether util.crand works before using it (fix #1734) util.crand can be configured at compile time to use the Linux getrandom() system call, available from Linux 3.17, but it is still possible to load it with an older kernel lacking that system call, where attempting to use it throws an ENOSYS error. By testing for this on load we can fall back to /dev/urandom in this case.
author Kim Alvefur <zash@zash.se>
date Sat, 02 Apr 2022 16:33:27 +0200
parent 12330:38b5b05407be
child 12482:b193f8a2737e
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) 2008-2010 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 rawgetopt = require"core.configmanager".rawget;
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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", module:get_option("require_encryption", true));
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14 local s2s_require_encryption = module:get_option("s2s_require_encryption", true);
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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 local xmpp_alpn = { alpn = "xmpp-server" };
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59
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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 s2sout");
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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, xmpp_alpn);
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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 module:log("debug", "Creating context for s2sin");
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69 -- for incoming server connections
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70 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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71 if not ssl_ctx_s2sin then module:log("error", "Error creating contexts for s2sin: %s", err_s2sin); end
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72
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73 if reload then
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74 module:log("info", "Certificates reloaded");
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75 else
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76 module:log("info", "Certificates loaded");
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77 end
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78 end
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79
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80 module:hook_global("config-reloaded", module.load);
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81
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82 local function can_do_tls(session)
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83 if session.conn and not session.conn.starttls then
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84 if not session.secure then
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85 session.log("debug", "Underlying connection does not support STARTTLS");
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86 end
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87 return false;
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88 elseif session.ssl_ctx ~= nil then
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89 return session.ssl_ctx;
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90 end
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91 if session.type == "c2s_unauthed" then
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92 if not ssl_ctx_c2s and c2s_require_encryption then
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93 session.log("error", "No TLS context available for c2s. Earlier error was: %s", err_c2s);
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94 end
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95 session.ssl_ctx = ssl_ctx_c2s;
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96 session.ssl_cfg = ssl_cfg_c2s;
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97 elseif session.type == "s2sin_unauthed" and allow_s2s_tls then
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98 if not ssl_ctx_s2sin and s2s_require_encryption then
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99 session.log("error", "No TLS context available for s2sin. Earlier error was: %s", err_s2sin);
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100 end
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101 session.ssl_ctx = ssl_ctx_s2sin;
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102 session.ssl_cfg = ssl_cfg_s2sin;
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103 elseif session.direction == "outgoing" and allow_s2s_tls then
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104 if not ssl_ctx_s2sout and s2s_require_encryption then
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105 session.log("error", "No TLS context available for s2sout. Earlier error was: %s", err_s2sout);
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106 end
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107 session.ssl_ctx = ssl_ctx_s2sout;
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108 session.ssl_cfg = ssl_cfg_s2sout;
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109 else
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110 session.log("debug", "Unknown session type, don't know which TLS context to use");
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111 return false;
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
112 end
7863
a634fe3c21f2 mod_tls: Add debug logging for when TLS should be doable but no ssl context was set
Kim Alvefur <zash@zash.se>
parents: 7834
diff changeset
113 if not session.ssl_ctx then
a634fe3c21f2 mod_tls: Add debug logging for when TLS should be doable but no ssl context was set
Kim Alvefur <zash@zash.se>
parents: 7834
diff changeset
114 session.log("debug", "Should be able to do TLS but no context available");
a634fe3c21f2 mod_tls: Add debug logging for when TLS should be doable but no ssl context was set
Kim Alvefur <zash@zash.se>
parents: 7834
diff changeset
115 return false;
a634fe3c21f2 mod_tls: Add debug logging for when TLS should be doable but no ssl context was set
Kim Alvefur <zash@zash.se>
parents: 7834
diff changeset
116 end
5685
f965ac6b7ce1 mod_tls: Refactor to allow separate SSL configuration for c2s and s2s connections
Kim Alvefur <zash@zash.se>
parents: 5378
diff changeset
117 return session.ssl_ctx;
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
118 end
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
119
12207
65e252940337 mod_s2s: Retrieve TLS context for outgoing Direct TLS connections from mod_tls
Kim Alvefur <zash@zash.se>
parents: 11766
diff changeset
120 module:hook("s2sout-created", function (event)
65e252940337 mod_s2s: Retrieve TLS context for outgoing Direct TLS connections from mod_tls
Kim Alvefur <zash@zash.se>
parents: 11766
diff changeset
121 -- Initialize TLS context for outgoing connections
65e252940337 mod_s2s: Retrieve TLS context for outgoing Direct TLS connections from mod_tls
Kim Alvefur <zash@zash.se>
parents: 11766
diff changeset
122 can_do_tls(event.session);
65e252940337 mod_s2s: Retrieve TLS context for outgoing Direct TLS connections from mod_tls
Kim Alvefur <zash@zash.se>
parents: 11766
diff changeset
123 end);
65e252940337 mod_s2s: Retrieve TLS context for outgoing Direct TLS connections from mod_tls
Kim Alvefur <zash@zash.se>
parents: 11766
diff changeset
124
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
125 -- Hook <starttls/>
2600
1e6f3002e04f mod_tls: Inlined some code.
Waqas Hussain <waqas20@gmail.com>
parents: 2596
diff changeset
126 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", function(event)
1e6f3002e04f mod_tls: Inlined some code.
Waqas Hussain <waqas20@gmail.com>
parents: 2596
diff changeset
127 local origin = event.origin;
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
128 if can_do_tls(origin) then
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
129 (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
130 if origin.destroyed then return end
2600
1e6f3002e04f mod_tls: Inlined some code.
Waqas Hussain <waqas20@gmail.com>
parents: 2596
diff changeset
131 origin: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
132 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
133 origin.log("debug", "TLS negotiation started for %s...", origin.type);
2600
1e6f3002e04f mod_tls: Inlined some code.
Waqas Hussain <waqas20@gmail.com>
parents: 2596
diff changeset
134 origin.secure = false;
2595
015934e20f03 mod_tls: Switched to new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 2594
diff changeset
135 else
015934e20f03 mod_tls: Switched to new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 2594
diff changeset
136 origin.log("warn", "Attempt to start TLS, but TLS is not available on this %s connection", origin.type);
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
137 (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
138 origin:close();
2595
015934e20f03 mod_tls: Switched to new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 2594
diff changeset
139 end
015934e20f03 mod_tls: Switched to new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 2594
diff changeset
140 return true;
015934e20f03 mod_tls: Switched to new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 2594
diff changeset
141 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
142
11727
f3aee8a825cc Fix various spelling errors (thanks codespell)
Kim Alvefur <zash@zash.se>
parents: 11580
diff changeset
143 -- Advertise stream feature
2607
35a5d1c5ea28 mod_tls: Hook stream-features event using new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 2605
diff changeset
144 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
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
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
147 features:add_child(c2s_feature);
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
148 end
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
149 end);
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
150 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
151 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
152 if can_do_tls(origin) then
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
153 features:add_child(s2s_feature);
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
154 end
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
155 end);
1875
334383faf77b mod_tls: Advertise and handle TLS for s2s connections
Matthew Wild <mwild1@gmail.com>
parents: 1675
diff changeset
156
334383faf77b mod_tls: Advertise and handle TLS for s2s connections
Matthew Wild <mwild1@gmail.com>
parents: 1675
diff changeset
157 -- 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
158 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
159 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
160 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
161 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
162 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
163 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
164 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
165 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
166 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
167 return;
11340
a7109eb45e30 mod_tls: Attempt STARTTLS even if not advertised as per RFC 7590
Kim Alvefur <zash@zash.se>
parents: 10784
diff changeset
168 end
6709
b6eff3ba13de mod_tls: Build <starttls/> as a stanza instead of with string concatenation
Kim Alvefur <zash@zash.se>
parents: 6526
diff changeset
169 session.sends2s(starttls_initiate);
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
170 return true;
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
171 end
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
172 end, 500);
1875
334383faf77b mod_tls: Advertise and handle TLS for s2s connections
Matthew Wild <mwild1@gmail.com>
parents: 1675
diff changeset
173
11766
6ad335cd43f9 mod_tls: Attempt STARTTLS on outgoing unencrypted legacy s2s connections
Kim Alvefur <zash@zash.se>
parents: 11727
diff changeset
174 module:hook("s2sout-authenticate-legacy", function(event)
6ad335cd43f9 mod_tls: Attempt STARTTLS on outgoing unencrypted legacy s2s connections
Kim Alvefur <zash@zash.se>
parents: 11727
diff changeset
175 local session = event.origin;
6ad335cd43f9 mod_tls: Attempt STARTTLS on outgoing unencrypted legacy s2s connections
Kim Alvefur <zash@zash.se>
parents: 11727
diff changeset
176 if s2s_require_encryption and can_do_tls(session) then
6ad335cd43f9 mod_tls: Attempt STARTTLS on outgoing unencrypted legacy s2s connections
Kim Alvefur <zash@zash.se>
parents: 11727
diff changeset
177 session.sends2s(starttls_initiate);
6ad335cd43f9 mod_tls: Attempt STARTTLS on outgoing unencrypted legacy s2s connections
Kim Alvefur <zash@zash.se>
parents: 11727
diff changeset
178 return true;
6ad335cd43f9 mod_tls: Attempt STARTTLS on outgoing unencrypted legacy s2s connections
Kim Alvefur <zash@zash.se>
parents: 11727
diff changeset
179 end
6ad335cd43f9 mod_tls: Attempt STARTTLS on outgoing unencrypted legacy s2s connections
Kim Alvefur <zash@zash.se>
parents: 11727
diff changeset
180 end, 200);
6ad335cd43f9 mod_tls: Attempt STARTTLS on outgoing unencrypted legacy s2s connections
Kim Alvefur <zash@zash.se>
parents: 11727
diff changeset
181
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
182 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
183 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
184 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
185 session:reset_stream();
94c0c8649826 mod_tls: Only accept <proceed> on outgoing s2s connections
Kim Alvefur <zash@zash.se>
parents: 7712
diff changeset
186 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
187 session.secure = false;
94c0c8649826 mod_tls: Only accept <proceed> on outgoing s2s connections
Kim Alvefur <zash@zash.se>
parents: 7712
diff changeset
188 return true;
94c0c8649826 mod_tls: Only accept <proceed> on outgoing s2s connections
Kim Alvefur <zash@zash.se>
parents: 7712
diff changeset
189 end
2605
ade70495fe7f mod_tls: Cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 2604
diff changeset
190 end);
11580
9ad5ec65132d mod_tls: Add "support" for <failure> by closing gracefully
Kim Alvefur <zash@zash.se>
parents: 11530
diff changeset
191
9ad5ec65132d mod_tls: Add "support" for <failure> by closing gracefully
Kim Alvefur <zash@zash.se>
parents: 11530
diff changeset
192 module:hook_tag(xmlns_starttls, "failure", function (session, stanza) -- luacheck: ignore 212/stanza
9ad5ec65132d mod_tls: Add "support" for <failure> by closing gracefully
Kim Alvefur <zash@zash.se>
parents: 11530
diff changeset
193 module:log("warn", "TLS negotiation with %s failed.", session.to_host);
9ad5ec65132d mod_tls: Add "support" for <failure> by closing gracefully
Kim Alvefur <zash@zash.se>
parents: 11530
diff changeset
194 session:close(nil, "TLS negotiation failed");
9ad5ec65132d mod_tls: Add "support" for <failure> by closing gracefully
Kim Alvefur <zash@zash.se>
parents: 11530
diff changeset
195 return false;
9ad5ec65132d mod_tls: Add "support" for <failure> by closing gracefully
Kim Alvefur <zash@zash.se>
parents: 11530
diff changeset
196 end);