--- a/mod_auth_external/mod_auth_external.lua	Wed Feb 05 23:38:57 2020 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,154 +0,0 @@
---
--- Prosody IM
--- Copyright (C) 2010 Waqas Hussain
--- Copyright (C) 2010 Jeff Mitchell
--- Copyright (C) 2013 Mikael Nordfeldth
--- Copyright (C) 2013 Matthew Wild, finally came to fix it all
---
--- This project is MIT/X11 licensed. Please see the
--- COPYING file in the source package for more information.
---
-
-local lpty = assert(require "lpty", "mod_auth_external requires lpty: https://modules.prosody.im/mod_auth_external.html#installation");
-local usermanager = require "core.usermanager";
-local new_sasl = require "util.sasl".new;
-local server = require "net.server";
-local have_async, async = pcall(require, "util.async");
-
-local log = module._log;
-local host = module.host;
-
-local script_type = module:get_option_string("external_auth_protocol", "generic");
-local command = module:get_option_string("external_auth_command", "");
-local read_timeout = module:get_option_number("external_auth_timeout", 5);
-local blocking = module:get_option_boolean("external_auth_blocking", true); -- non-blocking is very experimental
-local auth_processes = module:get_option_number("external_auth_processes", 1);
-
-assert(script_type == "ejabberd" or script_type == "generic",
-	"Config error: external_auth_protocol must be 'ejabberd' or 'generic'");
-assert(not host:find(":"), "Invalid hostname");
-
-
-if not blocking then
-	assert(server.event, "External auth non-blocking mode requires libevent installed and enabled");
-	log("debug", "External auth in non-blocking mode, yay!")
-	waiter, guard = async.waiter, async.guarder();
-elseif auth_processes > 1 then
-	log("warn", "external_auth_processes is greater than 1, but we are in blocking mode - reducing to 1");
-	auth_processes = 1;
-end
-
-local ptys = {};
-
-local pty_options = { throw_errors = false, no_local_echo = true, use_path = false };
-for i = 1, auth_processes do
-	ptys[i] = lpty.new(pty_options);
-end
-
-function module.unload()
-	for i = 1, auth_processes do
-		ptys[i]:endproc();
-	end
-end
-
-module:hook_global("server-cleanup", module.unload);
-
-local curr_process = 0;
-function send_query(text)
-	curr_process = (curr_process%auth_processes)+1;
-	local pty = ptys[curr_process];
-
-	local finished_with_pty
-	if not blocking then
-		finished_with_pty = guard(pty); -- Prevent others from crossing this line while we're busy
-	end
-	if not pty:hasproc() then
-		local status, ret = pty:exitstatus();
-		if status and (status ~= "exit" or ret ~= 0) then
-			log("warn", "Auth process exited unexpectedly with %s %d, restarting", status, ret or 0);
-			return nil;
-		end
-		local ok, err = pty:startproc(command);
-		if not ok then
-			log("error", "Failed to start auth process '%s': %s", command, err);
-			return nil;
-		end
-		log("debug", "Started auth process");
-	end
-
-	pty:send(text);
-	if blocking then
-		return pty:read(read_timeout);
-	else
-		local response;
-		local wait, done = waiter();
-		server.addevent(pty:getfd(), server.event.EV_READ, function ()
-			response = pty:read();
-			done();
-			return -1;
-		end);
-		wait();
-		finished_with_pty();
-		return response;
-	end
-end
-
-function do_query(kind, username, password)
-	if not username then return nil, "not-acceptable"; end
-
-	local query = (password and "%s:%s:%s:%s" or "%s:%s:%s"):format(kind, username, host, password);
-	local len = #query
-	if len > 1000 then return nil, "policy-violation"; end
-
-	if script_type == "ejabberd" then
-		local lo = len % 256;
-		local hi = (len - lo) / 256;
-		query = string.char(hi, lo)..query;
-	elseif script_type == "generic" then
-		query = query..'\n';
-	end
-
-	local response, err = send_query(query);
-	if not response then
-		log("warn", "Error while waiting for result from auth process: %s", err or "unknown error");
-	elseif (script_type == "ejabberd" and response == "\0\2\0\0") or
-		(script_type == "generic" and response:gsub("\r?\n$", "") == "0") then
-			return nil, "not-authorized";
-	elseif (script_type == "ejabberd" and response == "\0\2\0\1") or
-		(script_type == "generic" and response:gsub("\r?\n$", "") == "1") then
-			return true;
-	else
-		log("warn", "Unable to interpret data from auth process, %s",
-			(response:match("^error:") and response) or ("["..#response.." bytes]"));
-		return nil, "internal-server-error";
-	end
-end
-
-local provider = {};
-
-function provider.test_password(username, password)
-	return do_query("auth", username, password);
-end
-
-function provider.set_password(username, password)
-	return do_query("setpass", username, password);
-end
-
-function provider.user_exists(username)
-	return do_query("isuser", username);
-end
-
-function provider.create_user(username, password) -- luacheck: ignore 212
-	return nil, "Account creation/modification not available.";
-end
-
-function provider.get_sasl_handler()
-	local testpass_authentication_profile = {
-		plain_test = function(sasl, username, password, realm)
-			return usermanager.test_password(username, realm, password), true;
-		end,
-	};
-	return new_sasl(host, testpass_authentication_profile);
-end
-
-module:provides("auth", provider);