prosody
6e7678f6fe9a
plugins/mod_s2s_auth_certs.lua

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plugins/mod_s2s_auth_certs.lua @ 12161:6e7678f6fe9a

migrator: Customise cli argument parsing (--help, --verbose) Previously -v etc would do nothing and --config without argument would not have worked correctly.
author Kim Alvefur <zash@zash.se>
date Sun, 09 Jan 2022 15:19:55 +0100
parent 11835:a405884c62f4
child 12480:7e9ebdc75ce4
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92d009af6eba mod_s2s_auth_certs: Split PKIX based certificate checking from mod_s2s into new plugin
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1 module:set_global();
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2
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3 local cert_verify_identity = require "util.x509".verify_identity;
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4 local NULL = {};
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5 local log = module._log;
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6
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7 local measure_cert_statuses = module:metric("counter", "checked", "", "Certificate validation results",
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8 { "chain"; "identity" })
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9
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10 module:hook("s2s-check-certificate", function(event)
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11 local session, host, cert = event.session, event.host, event.cert;
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12 local conn = session.conn:socket();
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13 local log = session.log or log;
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14
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15 if not cert then
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16 log("warn", "No certificate provided by %s", host or "unknown host");
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17 return;
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18 end
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19
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20 local chain_valid, errors;
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21 if conn.getpeerverification then
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22 chain_valid, errors = conn:getpeerverification();
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23 else
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24 chain_valid, errors = false, { { "Chain verification not supported by this version of LuaSec" } };
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25 end
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26 -- Is there any interest in printing out all/the number of errors here?
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27 if not chain_valid then
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28 log("debug", "certificate chain validation result: invalid");
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29 for depth, t in pairs(errors or NULL) do
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30 log("debug", "certificate error(s) at depth %d: %s", depth-1, table.concat(t, ", "))
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31 end
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32 session.cert_chain_status = "invalid";
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33 session.cert_chain_errors = errors;
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34 else
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35 log("debug", "certificate chain validation result: valid");
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36 session.cert_chain_status = "valid";
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37
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38 -- We'll go ahead and verify the asserted identity if the
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39 -- connecting server specified one.
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40 if host then
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41 if cert_verify_identity(host, "xmpp-server", cert) then
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42 session.cert_identity_status = "valid"
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43 else
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44 session.cert_identity_status = "invalid"
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45 end
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46 log("debug", "certificate identity validation result: %s", session.cert_identity_status);
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47 end
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48 end
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49 measure_cert_statuses:with_labels(session.cert_chain_status or "unknown", session.cert_identity_status or "unknown"):add(1);
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50 end, 509);
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51