Mercurial > prosody-modules
view mod_e2e_policy/mod_e2e_policy.lua @ 3656:3e0f4d727825
mod_vcard_muc: Add an alternative method of signaling avatar change
When the avatar has been changed, a signal is sent that the room
configuration has changed. Clients then do a disco#info query to find
the SHA-1 of the new avatar. They can then fetch it as before, or not if
they have it cached already.
This is meant to be less disruptive than signaling via presence, which
caused problems for some clients.
If clients transition to the new method, the old one can eventually be removed.
The namespace is made up while waiting for standardization.
Otherwise it is very close to what's described in
https://xmpp.org/extensions/inbox/muc-avatars.html
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sun, 25 Aug 2019 20:46:43 +0200 |
parents | a76c420eca61 |
children |
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local st = require "util.stanza"; local jid_bare = require "util.jid".bare; local host = module.host; local e2e_policy_chat = module:get_option_string("e2e_policy_chat", "optional"); -- possible values: none, optional and required local e2e_policy_muc = module:get_option_string("e2e_policy_muc", "optional"); -- possible values: none, optional and required local e2e_policy_whitelist = module:get_option_set("e2e_policy_whitelist", { }); -- make this module ignore messages sent to and from this JIDs or MUCs 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."); 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."); 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."); 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."); function warn_on_plaintext_messages(event) -- check if JID is whitelisted if e2e_policy_whitelist:contains(jid_bare(event.stanza.attr.from)) or e2e_policy_whitelist:contains(jid_bare(event.stanza.attr.to)) then return nil; end local body = event.stanza:get_child_text("body"); -- do not warn for status messages if not body or event.stanza.attr.type == "error" then return nil; end -- check otr if body and body:sub(1,4) == "?OTR" then return nil; end -- check omemo https://xmpp.org/extensions/inbox/omemo.html if event.stanza:get_child("encrypted", "eu.siacs.conversations.axolotl") or event.stanza:get_child("encrypted", "urn:xmpp:omemo:0") then return nil; end -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html if event.stanza:get_child("x", "jabber:x:encrypted") then return nil; end -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html if event.stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then return nil; end -- no valid encryption found if e2e_policy_chat == "optional" and event.stanza.attr.type ~= "groupchat" then event.origin.send(st.message({ from = host, to = event.stanza.attr.from, type = "headline" }, e2e_policy_message_optional_chat)); end if e2e_policy_chat == "required" and event.stanza.attr.type ~= "groupchat" then return event.origin.send(st.error_reply(event.stanza, "modify", "policy-violation", e2e_policy_message_required_chat)); end if e2e_policy_muc == "optional" and event.stanza.attr.type == "groupchat" then event.origin.send(st.message({ from = host, to = event.stanza.attr.from, type = "headline" }, e2e_policy_message_optional_muc)); end if e2e_policy_muc == "required" and event.stanza.attr.type == "groupchat" then return event.origin.send(st.error_reply(event.stanza, "modify", "policy-violation", e2e_policy_message_required_muc)); end end module:hook("pre-message/bare", warn_on_plaintext_messages, 300); module:hook("pre-message/full", warn_on_plaintext_messages, 300); module:hook("pre-message/host", warn_on_plaintext_messages, 300);