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annotate mod_s2s_keysize_policy/mod_s2s_keysize_policy.lua @ 5585:5b316088bef5

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mod_rest: Use logger of HTTP request in trunk In Prosody trunk rev c975dafa4303 each HTTP request gained its own log sink, to make it easy to log things related to each request and group those messages. Especially where async is used, spreading the request and response apart as mod_rest does with iq stanzas, this grouped logging should help find related messages.
author Kim Alvefur <zash@zash.se>
date Fri, 07 Jul 2023 00:10:37 +0200
parents 27ffa6521d4e
children
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5294c8c1861c mod_s2s_keysize_policy: Don't trust keys weaker than 2048 bit RSA after 31 December 2013
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1 -- mod_s2s_keysize_policy.lua
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fc42f8484451 mod_s2s_keysize_policy: Add note about required LuaSec patch
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2 -- Requires LuaSec with this patch: https://github.com/brunoos/luasec/pull/12
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4 module:set_global();
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5
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6 local datetime_parse = require"util.datetime".parse;
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7 local pat = "^([JFMAONSD][ceupao][glptbvyncr]) ?(%d%d?) (%d%d):(%d%d):(%d%d) (%d%d%d%d) GMT$";
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8 local months = {Jan=1,Feb=2,Mar=3,Apr=4,May=5,Jun=6,Jul=7,Aug=8,Sep=9,Oct=10,Nov=11,Dec=12};
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9 local function parse_x509_datetime(s)
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10 local month, day, hour, min, sec, year = s:match(pat); month = months[month];
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11 return datetime_parse(("%04d-%02d-%02dT%02d:%02d:%02dZ"):format(year, month, day, hour, min, sec));
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12 end
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13
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14 local weak_key_cutoff = datetime_parse("2014-01-01T00:00:00Z");
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16 -- From RFC 4492
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17 local weak_key_size = {
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18 RSA = 2048,
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19 DSA = 2048,
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20 DH = 2048,
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21 EC = 233,
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22 }
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23
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24 module:hook("s2s-check-certificate", function(event)
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25 local host, session, cert = event.host, event.session, event.cert;
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26 if cert and cert.pubkey then
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27 local _, key_type, key_size = cert:pubkey();
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28 if key_size < ( weak_key_size[key_type] or 0 ) then
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b21236b6b8d8 Backed out changeset 853a382c9bd6
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29 local issued = parse_x509_datetime(cert:notbefore());
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30 if issued > weak_key_cutoff then
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31 session.log("warn", "%s has a %s-bit %s key issued after 31 December 2013, invalidating trust!", host, key_size, key_type);
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32 session.cert_chain_status = "invalid";
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33 session.cert_identity_status = "invalid";
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34 else
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35 session.log("warn", "%s has a %s-bit %s key", host, key_size, key_type);
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36 end
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37 else
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38 session.log("info", "%s has a %s-bit %s key", host, key_size, key_type);
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39 end
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40 end
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41 end);