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annotate mod_checkcerts/mod_checkcerts.lua @ 855:1983d4d51e1a

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mod_checkcerts: Improve, add comments, add forward compatibility.
author Kim Alvefur <zash@zash.se>
date Mon, 29 Oct 2012 00:46:51 +0100
parents ea9941812721
children a6c2345bcf87
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ea9941812721 mod_checkcerts: New module that logs a warning when your cert is about to expire.
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1 local ssl = require"ssl";
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2 local load_cert = ssl.x509 and ssl.x509.load
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3 or ssl.cert_from_pem; -- COMPAT mw/luasec-hg
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4
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5 if not load_cert then
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6 module:log("error", "This version of LuaSec (%s) does not support certificate checking", ssl._VERSION);
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7 return
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8 end
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9
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10 local function check_certs_validity()
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11 -- First, let's find out what certificate this host uses.
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12 local ssl_config = config.rawget(module.host, "core", "ssl");
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13 if not ssl_config then
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14 local base_host = module.host:match("%.(.*)");
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15 ssl_config = config.get(base_host, "core", "ssl");
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16 end
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17
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18 if ssl_config.certificate then
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19 local certfile = ssl_config.certificate;
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20 local cert;
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21
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22 local fh = io.open(certfile); -- Load the file.
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23 cert = fh and fh:read"*a";
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24 fh:close();
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25 cert = cert and load_cert(cert); -- And parse
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26 if not cert then return end
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27 -- No error reporting, certmanager should complain already
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28
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29 local now = os.time();
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30 local valid_at = cert.valid_at or cert.validat;
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31 if not valid_at then return end -- Broken or uncommon LuaSec version?
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32
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33 -- This might be wrong if the certificate has NotBefore in the future.
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34 -- However this is unlikely to happen in the wild.
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35 if not valid_at(cert, now) then
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36 module:log("warn", "The certificate %s has expired", certfile);
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37 elseif not valid_at(cert, now+86400*7) then
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38 module:log("warn", "The certificate %s will expire this week", certfile);
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39 elseif not valid_at(cert, now+86400*30) then
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40 module:log("info", "The certificate %s will expire later this month", certfile);
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41 end
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42 -- TODO Maybe notify admins
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43 end
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44 end
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46 module.load = check_certs_validity;
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47 module:hook_global("config-reloaded", check_certs_validity);