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mod_support_contact/mod_support_contact.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> |
---|---|
date | Sun, 22 Aug 2021 13:22:59 +0200 |
parent | 1343:7dbde05b48a9 |
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-- mod_support_contact.lua -- -- Config options: -- support_contact = "support@hostname"; -- a JID -- support_contact_nick = "Support!"; -- roster nick -- support_contact_group = "Users being supported!"; -- the roster group in the support contact's roster local host = module:get_host(); local support_contact = module:get_option_string("support_contact", "support@"..host); local support_contact_nick = module:get_option_string("support_contact_nick", "Support"); local support_contact_group = module:get_option_string("support_contact_group", "Users"); if not(support_contact and support_contact_nick) then return; end local rostermanager = require "core.rostermanager"; local jid_split = require "util.jid".split; local st = require "util.stanza"; module:hook("user-registered", function(event) module:log("debug", "Adding support contact"); local groups = support_contact_group and {[support_contact_group] = true;} or {}; local node, host = event.username, event.host; local jid = node and (node..'@'..host) or host; local roster; roster = rostermanager.load_roster(node, host); if hosts[host] then roster[support_contact] = {subscription = "both", name = support_contact_nick, groups = {}}; else roster[support_contact] = {subscription = "from", ask = "subscribe", name = support_contact_nick, groups = {}}; end rostermanager.save_roster(node, host, roster); node, host = jid_split(support_contact); if hosts[host] then roster = rostermanager.load_roster(node, host); roster[jid] = {subscription = "both", groups = groups}; rostermanager.save_roster(node, host, roster); rostermanager.roster_push(node, host, jid); else module:send(st.presence({from=jid, to=support_contact, type="subscribe"})); end end);