prosody-modules
da151f9af861
mod_checkcerts/mod_checkcerts.lua

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mod_checkcerts/mod_checkcerts.lua @ 4980:da151f9af861

replaced 'session' with 'origin' in push_disable session is not defined in this function, trying to access it leads to an error. The correct reference seems to be 'origin'. (This may have come about by copying from the similar code in process_stanza_queue.)
author arcseconds
date Sat, 30 Jul 2022 21:07:47 +1200
parent 4607:c8ccaac78f64
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2945
ec7f9c8f2a5f mod_checkcerts: Fixed luacheck warnings
Michel Le Bihan <michel@lebihan.pl>
parents: 1880
diff changeset
1 local config = require "core.configmanager";
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parents:
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2 local ssl = require"ssl";
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parents: 943
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3 local datetime_parse = require"util.datetime".parse;
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d9fcf9d8e787 mod_checkcerts: Fix for removal of globals in LuaSec
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parents: 1098
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4 local load_cert = ssl.loadcertificate;
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parents: 855
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5 local st = require"util.stanza"
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6
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7 -- These are in days.
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parents: 943
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8 local nag_time = module:get_option_number("checkcerts_notify", 7) * 86400;
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9
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parents: 667
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10 if not load_cert then
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11 module:log("error", "This version of LuaSec (%s) does not support certificate checking", ssl._VERSION);
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parents:
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12 return
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parents:
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13 end
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parents:
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14
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15 local pat = "^([JFMAONSD][ceupao][glptbvyncr]) ?(%d%d?) (%d%d):(%d%d):(%d%d) (%d%d%d%d) GMT$";
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16 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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Kim Alvefur <zash@zash.se>
parents: 943
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17 local function parse_x509_datetime(s)
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18 local month, day, hour, min, sec, year = s:match(pat); month = months[month];
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19 return datetime_parse(("%04d-%02d-%02dT%02d:%02d:%02dZ"):format(year, month, day, hour, min, sec));
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parents: 943
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20 end
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21
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22 local timeunits = {"minute",60,"hour",3600,"day",86400,"week",604800,"month",2629746,"year",31556952,};
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23 local function humantime(timediff)
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24 local ret = {};
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parents: 943
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25 for i=#timeunits,2,-2 do
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parents: 943
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26 if timeunits[i] < timediff then
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parents: 943
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27 local n = math.floor(timediff / timeunits[i]);
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28 if n > 0 and #ret < 2 then
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29 ret[#ret+1] = ("%d %s%s"):format(n, timeunits[i-1], n ~= 1 and "s" or "");
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30 timediff = timediff - n*timeunits[i];
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31 end
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32 end
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parents: 943
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33 end
cbbeac61f1ab mod_checkcerts: Add timestamp parsing, format time until expiry more human-readable, adjust check intervals to time left.
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parents: 943
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34 return table.concat(ret, " and ")
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parents: 943
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35 end
941
a6c2345bcf87 mod_checkcerts: Nag admins about certs that have, or are about to expire. Often.
Kim Alvefur <zash@zash.se>
parents: 855
diff changeset
36
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parents:
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37 local function check_certs_validity()
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Kim Alvefur <zash@zash.se>
parents: 855
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38 local now = os.time();
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parents: 855
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39
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parents: 667
diff changeset
40 -- First, let's find out what certificate this host uses.
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parents: 943
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41 local ssl_config = config.rawget(module.host, "ssl");
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42 if not ssl_config or not ssl_config.certificate then
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parents: 1672
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43 ssl_config = config.get(module.host:match("%.(.*)"), "ssl");
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44 end
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parents: 1672
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45 if not ssl_config or not ssl_config.certificate then
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parents: 1672
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46 ssl_config = config.get("*", "ssl");
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47 end
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parents: 1672
diff changeset
48 if not ssl_config or not ssl_config.certificate then
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ec7f9c8f2a5f mod_checkcerts: Fixed luacheck warnings
Michel Le Bihan <michel@lebihan.pl>
parents: 1880
diff changeset
49 module:log("warn", "Could not find a certificate to check");
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parents: 1672
diff changeset
50 return;
667
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
51 end
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Kim Alvefur <zash@zash.se>
parents:
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52
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53 local certfile = ssl_config.certificate;
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54 local fh, ferr = io.open(certfile); -- Load the file.
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parents: 1879
diff changeset
55 if not fh then
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parents: 1880
diff changeset
56 module:log("warn", "Could not open certificate %s", ferr);
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diff changeset
57 return;
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58 end
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parents: 1879
diff changeset
59 local cert, lerr = load_cert(fh:read("*a")); -- And parse
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parents: 1879
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60 fh:close();
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parents: 1879
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61 if not cert then
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parents: 1880
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62 module:log("warn", "Could not parse certificate %s: %s", certfile, lerr or "");
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63 return;
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parents: 1879
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64 end
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parents: 667
diff changeset
65
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66 local expires_at = parse_x509_datetime(cert:notafter());
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67 local expires_in = os.difftime(expires_at, now);
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parents: 1672
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68 local fmt = "Certificate %s expires in %s"
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parents: 1672
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69 local nag_admin = expires_in < nag_time;
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parents: 1672
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70 local log_warn = expires_in < nag_time * 2;
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parents: 1672
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71 local timediff = expires_in;
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72 if expires_in < 0 then
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parents: 1672
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73 fmt = "Certificate %s expired %s ago";
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parents: 1672
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74 timediff = -timediff;
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75 end
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parents: 1672
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76 timediff = humantime(timediff);
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parents: 1672
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77 module:log(log_warn and "warn" or "info", fmt, certfile, timediff);
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Kim Alvefur <zash@zash.se>
parents: 1672
diff changeset
78 if nag_admin then
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parents: 1672
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79 local body = fmt:format("for host ".. module.host, timediff);
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c8ccaac78f64 mod_checkcerts: Notify both host-local and global admins
Kim Alvefur <zash@zash.se>
parents: 2945
diff changeset
80 for admin in module:get_option_inherited_set("admins", {}) do
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81 module:send(st.message({ from = module.host, to = admin, type = "chat" }, body));
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82 end
667
ea9941812721 mod_checkcerts: New module that logs a warning when your cert is about to expire.
Kim Alvefur <zash@zash.se>
parents:
diff changeset
83 end
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parents: 1672
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84 return math.max(86400, expires_in / 3);
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Kim Alvefur <zash@zash.se>
parents:
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85 end
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Kim Alvefur <zash@zash.se>
parents:
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86
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Kim Alvefur <zash@zash.se>
parents: 943
diff changeset
87 module:add_timer(1, check_certs_validity);