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annotate mod_watchuntrusted/mod_watchuntrusted.lua @ 2047:2ec7c0b8a371

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mod_firewall/README: Fix table
author Kim Alvefur <zash@zash.se>
date Sat, 13 Feb 2016 15:00:50 +0100
parents 4c4a4191b825
children dd1f0173f538
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1 local jid_prep = require "util.jid".prep;
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3 local secure_auth = module:get_option_boolean("s2s_secure_auth", false);
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4 local secure_domains, insecure_domains =
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5 module:get_option_set("s2s_secure_domains", {})._items, module:get_option_set("s2s_insecure_domains", {})._items;
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7 local untrusted_fail_watchers = module:get_option_set("untrusted_fail_watchers", module:get_option("admins", {})) / jid_prep;
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8 local untrusted_fail_notification = module:get_option("untrusted_fail_notification", "Establishing a secure connection from $from_host to $to_host failed. Certificate hash: $sha1. $errors");
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10 local st = require "util.stanza";
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12 local notified_about_already = { };
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14 module:hook_global("s2s-check-certificate", function (event)
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15 local session, host = event.session, event.host;
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16 if not host then return end
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17 local conn = session.conn:socket();
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18 local local_host = session.direction == "outgoing" and session.from_host or session.to_host;
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20 if not (local_host == module:get_host()) then return end
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22 module:log("debug", "Checking certificate...");
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23 local must_secure = secure_auth;
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25 if not must_secure and secure_domains[host] then
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26 must_secure = true;
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27 elseif must_secure and insecure_domains[host] then
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28 must_secure = false;
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29 end
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30
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31 if must_secure and (session.cert_chain_status ~= "valid" or session.cert_identity_status ~= "valid") and not notified_about_already[host] then
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32 notified_about_already[host] = os.time();
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33 local _, errors = conn:getpeerverification();
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34 local error_message = "";
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35
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36 for depth, t in pairs(errors or {}) do
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37 if #t > 0 then
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38 error_message = error_message .. "Error with certificate " .. (depth - 1) .. ": " .. table.concat(t, ", ") .. ". ";
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39 end
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40 end
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42 if session.cert_identity_status then
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43 error_message = error_message .. "This certificate is " .. session.cert_identity_status .. " for " .. host .. ".";
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44 end
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45
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46 local replacements = {
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47 sha1 = event.cert and event.cert:digest("sha1") or "(No certificate)",
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48 sha256 = event.cert and event.cert:digest("sha256") or "(No certificate)",
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49 errors = error_message
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50 };
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51
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52 local message = st.message{ type = "chat", from = local_host }
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53 :tag("body")
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54 :text(untrusted_fail_notification:gsub("%$([%w_]+)", function (v)
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55 return event[v] or session and session[v] or replacements and replacements[v] or nil;
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56 end));
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57 for jid in untrusted_fail_watchers do
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58 module:log("debug", "Notifying %s", jid);
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59 message.attr.to = jid;
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60 module:send(message);
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61 end
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62 end
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63 end, -0.5);
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64
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65 module:add_timer(14400, function (now)
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66 for host, time in pairs(notified_about_already) do
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67 if time + 86400 > now then
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68 notified_about_already[host] = nil;
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69 end
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70 end
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71 return 14400;
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72 end)