-- 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.

--

-- luacheck: ignore 212

local log = require "util.logger".init("auth_cyrus");

local usermanager_user_exists = require "core.usermanager".user_exists;

local cyrus_service_realm = module:get_option("cyrus_service_realm");

local cyrus_service_name = module:get_option("cyrus_service_name");

local cyrus_application_name = module:get_option("cyrus_application_name");

local require_provisioning = module:get_option("cyrus_require_provisioning") or false;

local host_fqdn = module:get_option("cyrus_server_fqdn");

prosody.unlock_globals(); --FIXME: Figure out why this is needed and

						  -- why cyrussasl isn't caught by the sandbox

local cyrus_new = module:require "sasl_cyrus".new;

prosody.lock_globals();

local new_sasl = function(realm)

	return cyrus_new(

		cyrus_service_realm or realm,

		cyrus_service_name or "xmpp",

		cyrus_application_name or "prosody",

		host_fqdn

	);

end

do -- diagnostic

	local list;

	for mechanism in pairs(new_sasl(module.host):mechanisms()) do

		list = (not(list) and mechanism) or (list..", "..mechanism);

	end

	if not list then

		module:log("error", "No Cyrus SASL mechanisms available");

	else

		module:log("debug", "Available Cyrus SASL mechanisms: %s", list);

	end

end

local host = module.host;

-- define auth provider

local provider = {};

log("debug", "initializing default authentication provider for host '%s'", host);

function provider.test_password(username, password)

	return nil, "Legacy auth not supported with Cyrus SASL.";

end

function provider.get_password(username)

	return nil, "Passwords unavailable for Cyrus SASL.";

end

function provider.set_password(username, password)

	return nil, "Passwords unavailable for Cyrus SASL.";

end

function provider.user_exists(username)

	if require_provisioning then

		return usermanager_user_exists(username, host);

	end

	return true;

end

function provider.create_user(username, password)

	return nil, "Account creation/modification not available with Cyrus SASL.";

end

function provider.get_sasl_handler()

	local handler = new_sasl(host);

	if require_provisioning then

		function handler.require_provisioning(username)

			return usermanager_user_exists(username, host);

		end

	end

	return handler;

end

module:provides("auth", provider);