prosody-modules
a754f7e380b2
mod_watchuntrusted/mod_watchuntrusted.lua

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mod_watchuntrusted/mod_watchuntrusted.lua @ 4764:a754f7e380b2

mod_dnsupdate: Rewrite port config vs DNS comparison code I'm not sure if it was correct, which means it was hard to understand and thus needed to be simplified. Hope this accomplishes that.
author Kim Alvefur <zash@zash.se>
date Mon, 08 Nov 2021 23:03:14 +0100
parent 3220:0e78523f8c20
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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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6
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7 local ignore_domains = module:get_option_set("untrusted_ignore_domains", {})._items;
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9 local untrusted_fail_watchers = module:get_option_set("untrusted_fail_watchers", module:get_option("admins", {})) / jid_prep;
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10 local untrusted_fail_notification = module:get_option("untrusted_fail_notification", "Establishing a secure connection from $from_host to $to_host failed. Certificate hash: $sha256. $errors");
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12 local msg_type = module:get_option_string("untrusted_message_type", "chat");
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14 local st = require "util.stanza";
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16 local notified_about_already = { };
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18 module:hook_global("s2s-check-certificate", function (event)
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19 local session, host = event.session, event.host;
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20 if not host then return end
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21 local conn = session.conn:socket();
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22 local local_host = session.direction == "outgoing" and session.from_host or session.to_host;
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24 if not (local_host == module:get_host()) then return end
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26 module:log("debug", "Checking certificate...");
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27 local certificate_is_valid = false;
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29 if session.cert_chain_status == "valid" and session.cert_identity_status == "valid" then
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30 certificate_is_valid = true;
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31 end
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33 local must_secure = secure_auth;
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35 if not must_secure and secure_domains[host] then
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36 must_secure = true;
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37 elseif must_secure and insecure_domains[host] then
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38 must_secure = false;
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39 end
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41 if must_secure and not certificate_is_valid and not notified_about_already[host] and not ignore_domains[host] then
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42 notified_about_already[host] = os.time();
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43 local _, errors = conn:getpeerverification();
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44 local error_message = "";
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46 for depth, t in pairs(errors or {}) do
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47 if #t > 0 then
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48 error_message = error_message .. "Error with certificate " .. (depth - 1) .. ": " .. table.concat(t, ", ") .. ". ";
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49 end
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50 end
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52 if session.cert_identity_status then
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53 error_message = error_message .. "This certificate is " .. session.cert_identity_status .. " for " .. host .. ".";
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54 end
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55
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56 local replacements = {
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57 sha1 = event.cert and event.cert:digest("sha1") or "(No certificate)",
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58 sha256 = event.cert and event.cert:digest("sha256") or "(No certificate)",
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59 errors = error_message
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60 };
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61
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62 local message = st.message({ type = msg_type, from = local_host },
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63 untrusted_fail_notification:gsub("%$([%w_]+)", function (v)
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64 return event[v] or session and session[v] or replacements and replacements[v] or nil;
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65 end));
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66 for jid in untrusted_fail_watchers do
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67 module:log("debug", "Notifying %s", jid);
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68 message.attr.to = jid;
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69 module:send(message);
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70 end
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71 end
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72 end, -0.5);
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73
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74 module:add_timer(14400, function (now)
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75 for host, time in pairs(notified_about_already) do
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76 if time + 86400 < now then
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77 notified_about_already[host] = nil;
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78 end
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79 end
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80 return 14400;
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81 end)