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view mod_s2s_keysize_policy/mod_s2s_keysize_policy.lua @ 3656:3e0f4d727825

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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 27ffa6521d4e
children
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-- mod_s2s_keysize_policy.lua
-- Requires LuaSec with this patch: https://github.com/brunoos/luasec/pull/12

module:set_global();

local datetime_parse = require"util.datetime".parse;
local pat = "^([JFMAONSD][ceupao][glptbvyncr])  ?(%d%d?) (%d%d):(%d%d):(%d%d) (%d%d%d%d) GMT$";
local months = {Jan=1,Feb=2,Mar=3,Apr=4,May=5,Jun=6,Jul=7,Aug=8,Sep=9,Oct=10,Nov=11,Dec=12};
local function parse_x509_datetime(s)
	local month, day, hour, min, sec, year = s:match(pat); month = months[month];
	return datetime_parse(("%04d-%02d-%02dT%02d:%02d:%02dZ"):format(year, month, day, hour, min, sec));
end

local weak_key_cutoff = datetime_parse("2014-01-01T00:00:00Z");

-- From RFC 4492
local weak_key_size = {
	RSA = 2048,
	DSA = 2048,
	DH  = 2048,
	EC  =  233,
}

module:hook("s2s-check-certificate", function(event)
	local host, session, cert = event.host, event.session, event.cert;
	if cert and cert.pubkey then
		local _, key_type, key_size = cert:pubkey();
		if key_size < ( weak_key_size[key_type] or 0 ) then
			local issued = parse_x509_datetime(cert:notbefore());
			if issued > weak_key_cutoff then
				session.log("warn", "%s has a %s-bit %s key issued after 31 December 2013, invalidating trust!", host, key_size, key_type);
				session.cert_chain_status = "invalid";
				session.cert_identity_status = "invalid";
			else
				session.log("warn", "%s has a %s-bit %s key", host, key_size, key_type);
			end
		else
			session.log("info", "%s has a %s-bit %s key", host, key_size, key_type);
		end
	end
end);