view mod_s2s_auth_fingerprint/mod_s2s_auth_fingerprint.lua @ 5818:d3b69859553a

mod_password_policy: Change error type from 'cancel' to 'modify' This makes more sense, as the problem relates to the data that has been entered, and therefore the request could be retried with different data.
author Matthew Wild <mwild1@gmail.com>
date Mon, 08 Jan 2024 17:28:39 +0000
parents ee2cedb0f691
children
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-- Copyright (C) 2013-2014 Kim Alvefur
-- This file is MIT/X11 licensed.

module:set_global();

local digest_algo = module:get_option_string(module:get_name().."_digest", "sha1");

local fingerprints = {};

local function hashprep(h)
	return tostring(h):gsub(":",""):lower();
end

local function hashfmt(h)
	return h:gsub("..","%0:", #h/2-1):upper();
end

for host, set in pairs(module:get_option("s2s_trusted_fingerprints", {})) do
	local host_set = {}
	if type(set) == "table" then -- list of fingerprints
		for i=1,#set do
			host_set[hashprep(set[i])] = true;
		end
	else -- assume single fingerprint
		host_set[hashprep(set)] = true;
	end
	fingerprints[host] = host_set;
end

module:hook("s2s-check-certificate", function(event)
	local session, host, cert = event.session, event.host, event.cert;

	local host_fingerprints = fingerprints[host];
	if host_fingerprints then
		local digest = cert and cert:digest(digest_algo);
		if host_fingerprints[digest] then
			module:log("info", "'%s' matched %s fingerprint %s", host, digest_algo:upper(), hashfmt(digest));
			session.cert_chain_status = "valid";
			session.cert_identity_status = "valid";
			return true;
		else
			module:log("warn", "'%s' has unknown %s fingerprint %s", host, digest_algo:upper(), hashfmt(digest));
			session.cert_chain_status = "invalid";
			session.cert_identity_status = "invalid";
		end
	end
end);