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mod_s2s_keysize_policy/mod_s2s_keysize_policy.lua @ 4877:adc6241e5d16
mod_measure_process: Report the enforced limit
The soft limit is what the kernel actually enforces, while the hard
limit is is how far you can change the soft limit without privileges.
Unless the process dynamically adjusts the soft limit, knowing the hard
limit is not as useful as knowing the soft limit.
Reporting the soft limit and the number of in-use FDs allows placing
alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 18 Jan 2022 18:55:20 +0100 |
parent | 2424:27ffa6521d4e |
rev | line source |
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1203
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mod_s2s_keysize_policy: Don't trust keys weaker than 2048 bit RSA after 31 December 2013
Kim Alvefur <zash@zash.se>
parents:
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1 -- mod_s2s_keysize_policy.lua |
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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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3 |
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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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15 |
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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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29 local issued = parse_x509_datetime(cert:notbefore()); |
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30 if issued > weak_key_cutoff then |
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27ffa6521d4e
mod_s2s_keysize_policy: Lower log message to a warning since it is not really a fatal error
Kim Alvefur <zash@zash.se>
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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); |