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annotate mod_s2s_auth_fingerprint/mod_s2s_auth_fingerprint.lua @ 4421:94805a7e7b30

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mod_invites: rework CLI parsing to support groups To make this sensible, the code had to move from rather simple parsing to something which looks more like getopt or your typical shell script.
author Jonas Schäfer <jonas@wielicki.name>
date Sun, 31 Jan 2021 19:16:36 +0100
parents ee2cedb0f691
children
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1 -- Copyright (C) 2013-2014 Kim Alvefur
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2 -- This file is MIT/X11 licensed.
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4 module:set_global();
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6 local digest_algo = module:get_option_string(module:get_name().."_digest", "sha1");
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8 local fingerprints = {};
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10 local function hashprep(h)
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11 return tostring(h):gsub(":",""):lower();
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12 end
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14 local function hashfmt(h)
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15 return h:gsub("..","%0:", #h/2-1):upper();
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16 end
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18 for host, set in pairs(module:get_option("s2s_trusted_fingerprints", {})) do
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19 local host_set = {}
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20 if type(set) == "table" then -- list of fingerprints
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21 for i=1,#set do
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22 host_set[hashprep(set[i])] = true;
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23 end
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24 else -- assume single fingerprint
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25 host_set[hashprep(set)] = true;
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26 end
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27 fingerprints[host] = host_set;
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28 end
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30 module:hook("s2s-check-certificate", function(event)
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31 local session, host, cert = event.session, event.host, event.cert;
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33 local host_fingerprints = fingerprints[host];
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34 if host_fingerprints then
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35 local digest = cert and cert:digest(digest_algo);
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36 if host_fingerprints[digest] then
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37 module:log("info", "'%s' matched %s fingerprint %s", host, digest_algo:upper(), hashfmt(digest));
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38 session.cert_chain_status = "valid";
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39 session.cert_identity_status = "valid";
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40 return true;
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41 else
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42 module:log("warn", "'%s' has unknown %s fingerprint %s", host, digest_algo:upper(), hashfmt(digest));
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43 session.cert_chain_status = "invalid";
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44 session.cert_identity_status = "invalid";
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45 end
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46 end
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47 end);