prosody-modules
e556219cb43d
mod_s2s_auth_dnssec_srv/mod_s2s_auth_dnssec_srv.lua

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mod_s2s_auth_dnssec_srv/mod_s2s_auth_dnssec_srv.lua @ 1302:e556219cb43d

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author Christian Weiske <cweiske@cweiske.de>
date Fri, 14 Feb 2014 15:08:11 +0100
parent 1130:29dcdea3c2be
child 1343:7dbde05b48a9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1008
2b2d4b1de638 mod_s2s_auth_dnssec_srv: Implements Secure Delegation using DNS SRV
Kim Alvefur <zash@zash.se>
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1 -- Copyright (C) 2013 Kim Alvefur
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2 -- This file is MIT/X11 licensed.
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3 --
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Kim Alvefur <zash@zash.se>
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4 -- Implements Secure Delegation using DNS SRV as described in
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Kim Alvefur <zash@zash.se>
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5 -- http://tools.ietf.org/html/draft-miller-xmpp-dnssec-prooftype
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6 --
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Kim Alvefur <zash@zash.se>
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7 -- Dependecies:
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Kim Alvefur <zash@zash.se>
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8 -- Prosody above hg:43059357b2f0
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9 -- DNSSEC-validating DNS resolver
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Kim Alvefur <zash@zash.se>
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10 -- https://github.com/Zash/luaunbound
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Kim Alvefur <zash@zash.se>
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11 -- libunbound binding using LuaJIT FFI
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12
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13 module:set_global();
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14
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15 local nameprep = require"util.encodings".stringprep.nameprep;
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16 local to_unicode = require"util.encodings".idna.to_unicode;
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Kim Alvefur <zash@zash.se>
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17 local cert_verify_identity = require "util.x509".verify_identity;
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18
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19 module:hook("s2s-check-certificate", function(event)
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20 local session, cert = event.session, event.cert;
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21
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22 if session.cert_chain_status == "valid" and session.cert_identity_status ~= "valid"
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23 and session.srv_choice and session.srv_hosts.answer and session.srv_hosts.answer.secure then
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24 local srv_target = nameprep(to_unicode(session.srv_hosts[session.srv_choice].target:gsub("%.?$","")));
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25 (session.log or module._log)("debug", "Comparing certificate with Secure SRV target %s", srv_target);
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26 if srv_target and cert_verify_identity(srv_target, "xmpp-server", cert) then
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27 (session.log or module._log)("info", "Certificate matches Secure SRV target %s", srv_target);
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28 session.cert_identity_status = "valid";
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29 end
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30 end
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31 end);