Mercurial > prosody-modules

annotate mod_e2e_policy/mod_e2e_policy.lua @ 2608:362ca94192ee

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mod_smacks: Add resumed session to event "smacks-hibernation-end" Older versions of this event only have the "intermediate" session in event.session (the one used to resume the existing session), but not the resumed one. This adds event.resumed which contains the resumed one alongside to event.session.
author tmolitor <thilo@eightysoft.de>
date Sat, 11 Mar 2017 01:37:28 +0100
parents 611a787e6d08
children 58d61459cdb1
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1 local st = require "util.stanza";
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2 local host = module.host;
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3 local e2e_policy_chat = module:get_option_string("e2e_policy_chat", "optional"); -- possible values: none, optional and required
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4 local e2e_policy_muc = module:get_option_string("e2e_policy_muc", "optional"); -- possible values: none, optional and required
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5 local e2e_policy_whitelist = module:get_option_set("e2e_policy_whitelist", { }); -- make this module ignore messages sent to and from this JIDs or MUCs
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6
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7 local e2e_policy_message_optional_chat = module:get_option_string("e2e_policy_message_optional_chat", "For security reasons, OMEMO, OTR or PGP encryption is STRONGLY recommended for conversations on this server.");
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8 local e2e_policy_message_required_chat = module:get_option_string("e2e_policy_message_required_chat", "For security reasons, OMEMO, OTR or PGP encryption is required for conversations on this server.");
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9 local e2e_policy_message_optional_muc = module:get_option_string("e2e_policy_message_optional_muc", "For security reasons, OMEMO, OTR or PGP encryption is STRONGLY recommended for MUC on this server.");
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10 local e2e_policy_message_required_muc = module:get_option_string("e2e_policy_message_required_muc", "For security reasons, OMEMO, OTR or PGP encryption is required for MUC on this server.");
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11
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12 function warn_on_plaintext_messages(event)
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13 -- check if JID is whitelisted
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14 if e2e_policy_whitelist:contains(event.stanza.attr.from) or e2e_policy_whitelist:contains(event.stanza.attr.to) then
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15 return nil;
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16 end
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17 local body = event.stanza:get_child_text("body");
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18 -- do not warn for status messages
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19 if not body or event.stanza.attr.type == "error" then
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20 return nil;
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21 end
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22 -- check otr
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23 if body and body:sub(1,4) == "?OTR" then
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24 return nil;
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25 end
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26 -- check omemo https://xmpp.org/extensions/inbox/omemo.html
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27 if event.stanza:get_child("encrypted", "eu.siacs.conversations.axolotl") or event.stanza:get_child("encrypted", "urn:xmpp:omemo:0") then
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28 return nil;
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29 end
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30 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html
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31 if event.stanza:get_child("x", "jabber:x:encrypted") then
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32 return nil;
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33 end
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34 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html
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35 if event.stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then
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36 return nil;
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37 end
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38 -- no valid encryption found
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39 if e2e_policy_chat == "optional" and event.stanza.attr.type ~= "groupchat" then
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40 event.origin.send(st.message({ from = host, type = "headline" }, e2e_policy_message_optional_chat));
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41 end
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42 if e2e_policy_chat == "required" and event.stanza.attr.type ~= "groupchat" then
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43 return event.origin.send(st.error_reply(event.stanza, "modify", "policy-violation", e2e_policy_message_required_chat));
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44 end
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45 if e2e_policy_muc == "optional" and event.stanza.attr.type == "groupchat" then
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46 event.origin.send(st.message({ from = host, type = "headline" }, e2e_policy_message_optional_muc));
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47 end
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48 if e2e_policy_muc == "required" and event.stanza.attr.type == "groupchat" then
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49 return event.origin.send(st.error_reply(event.stanza, "modify", "policy-violation", e2e_policy_message_required_muc));
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50 end
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51 end
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52
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53 module:hook("pre-message/bare", warn_on_plaintext_messages, 300);
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54 module:hook("pre-message/full", warn_on_plaintext_messages, 300);
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55 module:hook("pre-message/host", warn_on_plaintext_messages, 300);