annotate mod_watchuntrusted/mod_watchuntrusted.lua @ 5186:fa3059e653fa

mod_http_oauth2: Implement the Implicit flow Everyone says this is insecure and bad, but it's also the only thing that makes sense for e.g. pure JavaScript clients, but hey implement this even more complicated thing instead!
author Kim Alvefur <zash@zash.se>
date Thu, 02 Mar 2023 22:06:50 +0100
parents 0e78523f8c20
children
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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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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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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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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)