Mercurial > prosody-modules
annotate mod_s2s_auth_monkeysphere/mod_s2s_auth_monkeysphere.lua @ 4651:8231774f5bfd
mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8
The `body:sub()` call risks splitting the string in the middle of a
multi-byte UTF-8 sequence. This should have been caught by util.stanza
validation, but that would have caused some havoc, at the very least causing
the notification to not be sent.
There have been no reports of this happening. Likely because this module
isn't widely deployed among users with languages that use many longer UTF-8
sequences.
The util.encodings.utf8.valid() function is O(n) where only the last
sequence really needs to be checked, but it's in C and expected to be fast.
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 22 Aug 2021 13:22:59 +0200 |
parents | 8d1141025b43 |
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1 module:set_global(); |
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2 |
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3 local json = require"util.json"; |
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4 local json_encode, json_decode = json.encode, json.decode; |
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5 local gettime = require"socket".gettime; |
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6 local serialize = require"util.serialization".serialize; |
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7 local async = require"util.async"; |
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8 local http_request = require "net.http".request; |
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9 |
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10 local msva_url = assert(os.getenv"MONKEYSPHERE_VALIDATION_AGENT_SOCKET", |
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11 "MONKEYSPHERE_VALIDATION_AGENT_SOCKET is unset, please set it").."/reviewcert"; |
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12 |
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13 local function check_with_monkeysphere(event) |
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14 local session, host, cert = event.session, event.host, event.cert; |
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15 local post_body = json_encode { |
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16 peer = { |
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17 name = host; |
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18 type = "peer"; |
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19 }; |
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20 context = "https"; |
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21 -- context = "xmpp"; -- Monkeysphere needs to be extended to understand this |
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22 pkc = { |
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23 type = "x509pem"; |
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24 data = cert:pem(); |
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25 }; |
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26 } |
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27 local req = { |
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28 method = "POST"; |
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29 headers = { |
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30 ["Content-Type"] = "application/json"; |
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31 }; |
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32 body = post_body; |
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33 }; |
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34 session.log("debug", "Asking what Monkeysphere thinks about this certificate"); |
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35 local starttime = gettime(); |
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36 local wait, done = async.waiter(); |
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37 local body, code; |
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38 http_request(msva_url, req, function (_, _code) |
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39 body, code = body, _code; |
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40 done(); |
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41 end); |
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42 wait(); |
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43 module:log("debug", "Request took %fs", gettime() - starttime); |
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44 if code == 200 and body then |
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45 body = json_decode(body); |
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46 if body then |
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47 session.log(body.valid and "info" or "warn", |
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48 "Monkeysphere thinks the cert is %salid: %s", body.valid and "V" or "Inv", body.message); |
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49 if body.valid then |
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50 session.cert_chain_status = "valid"; |
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51 session.cert_identity_status = "valid"; |
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52 return true; |
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53 end |
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54 end |
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55 else |
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56 module:log("warn", "Request failed: %s, %s", tostring(code), tostring(body)); |
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57 module:log("debug", serialize(req)); |
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58 end |
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59 end |
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60 |
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61 module:hook("s2s-check-certificate", check_with_monkeysphere); |