view mod_require_otr/mod_require_otr.lua @ 1295:dfe1818962f5

mod_require_otr: New module to (attempt to) require that all messages are encrypted with OTR (credit for the idea goes to Gregory Maxwell on the liberationtech mailing list)
author Matthew Wild <>
date Sat, 01 Feb 2014 04:42:30 +0500
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local st = require "util.stanza";
local block_groupchat = module:get_option_boolean("otr_block_groupchat", false);

function reject_plaintext_messages(event)
    local body = event.stanza:get_child_text("body");
    if body and body:sub(1,4) ~= "?OTR" or (not block_groupchat and event.stanza.attr.type == "groupchat") then
        return event.origin.send(st.error_reply(event.stanza, "modify", "policy-violation", "OTR encryption is required for conversations on this server"));

module:hook("pre-message/bare", reject_plaintext_messages, 300);
module:hook("pre-message/full", reject_plaintext_messages, 300);
module:hook("pre-message/host", reject_plaintext_messages, 300);