view mod_private_adhoc/mod_private_adhoc.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
parents deb79c2357bb
children
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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

-- Module by Thomas Raschbacher 2014
-- lordvan@lordvan.com

module:depends"adhoc";
local dataforms_new = require "util.dataforms".new;
local st = require "util.stanza";
local jid_split = require "util.jid".split;

local private_storage = module:open_store("private");

local private_adhoc_result_layout = dataforms_new{
   { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
   { name = "privatexmldata", type = "text-multi", label = "Private XML data" };
};


function private_adhoc_command_handler (self, data, state)
   local username, hostname = jid_split(data.from);
   local data, err = private_storage:get(username);
   local dataString = "";
   if not data then
      dataString = "No data found.";
      if err then dataString = dataString..err end;
   else
      for key,value in pairs(data) do
	 dataString = dataString..tostring(st.deserialize(value)):gsub("><",">\n<")
	 dataString = dataString.."\n\n";
      end
   end
   return { status = "completed", result= { layout = private_adhoc_result_layout, values = {privatexmldata=dataString.."\n"}} };
end

local adhoc_new = module:require "adhoc".new;
local descriptor = adhoc_new("Query private data", "private_adhoc", private_adhoc_command_handler, "local_user");
module:add_item ("adhoc", descriptor);