Software / code / prosody
Annotate
plugins/mod_s2s_auth_certs.lua @ 12032:3db09eb4c43b
util.format: Ensure sanitation of strings passed to wrong format
Ie. log("debug", "%d", "\1\2\3") should not result in garbage.
Also optimizing for the common case of ASCII string passed to %s and
early returns everywhere.
Returning nil from a gsub callback keeps the original substring.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Sat, 11 Dec 2021 13:30:34 +0100 |
| parent | 11835:a405884c62f4 |
| child | 12480:7e9ebdc75ce4 |
| rev | line source |
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mod_s2s_auth_certs: Split PKIX based certificate checking from mod_s2s into new plugin
Kim Alvefur <zash@zash.se>
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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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mod_s2s_auth_certs: Collect stats on validation results (for #975)
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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 |
