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annotate mod_watchuntrusted/mod_watchuntrusted.lua @ 1204:fc42f8484451

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mod_s2s_keysize_policy: Add note about required LuaSec patch
author Kim Alvefur <zash@zash.se>
date Sun, 29 Sep 2013 19:11:29 +0200
parents 5eaecb7f680d
children 116488cced16
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5eaecb7f680d mod_watchuntrusted: New module that will warn admins about s2s connections that fail due to lack of encryption or invalid certificates.
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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 module:hook_global("s2s-check-certificate", function (event)
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13 local session, host = event.session, event.host;
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14 local conn = session.conn:socket();
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15 local local_host = session.direction == "outgoing" and session.from_host or session.to_host;
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17 if not (local_host == module:get_host()) then return end
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19 module:log("debug", "Checking certificate...");
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20 local must_secure = secure_auth;
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22 if not must_secure and secure_domains[host] then
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23 must_secure = true;
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24 elseif must_secure and insecure_domains[host] then
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25 must_secure = false;
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26 end
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28 if must_secure and (session.cert_chain_status ~= "valid" or session.cert_identity_status ~= "valid") then
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29 local _, errors = conn:getpeerverification();
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30 local error_message = "";
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32 for depth, t in pairs(errors or {}) do
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33 if #t > 0 then
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34 error_message = error_message .. "Error with certificate " .. (depth - 1) .. ": " .. table.concat(t, ", ") .. ". ";
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35 end
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36 end
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38 if session.cert_identity_status then
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39 error_message = error_message .. "This certificate is " .. session.cert_identity_status .. " for " .. host .. ".";
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40 end
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42 local replacements = { sha1 = event.cert and event.cert:digest("sha1"), errors = error_message };
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44 local message = st.message{ type = "chat", from = local_host }
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45 :tag("body")
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46 :text(untrusted_fail_notification:gsub("%$([%w_]+)", function (v)
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47 return event[v] or session and session[v] or replacements and replacements[v] or nil;
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48 end));
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49 for jid in untrusted_fail_watchers do
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50 module:log("debug", "Notifying %s", jid);
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51 message.attr.to = jid;
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52 module:send(message);
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53 end
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54 end
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55 end, -0.5);
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