File

plugins/mod_auth_internal_plain.lua @ 12446:e54b8a5e35ad 0.12

util.random: Test whether util.crand works before using it (fix #1734) util.crand can be configured at compile time to use the Linux getrandom() system call, available from Linux 3.17, but it is still possible to load it with an older kernel lacking that system call, where attempting to use it throws an ENOSYS error. By testing for this on load we can fall back to /dev/urandom in this case.
author Kim Alvefur <zash@zash.se>
date Sat, 02 Apr 2022 16:33:27 +0200
parent 11544:c98aebe601f9
child 12646:3f38f4735c7a
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-- 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.
--

local usermanager = require "core.usermanager";
local new_sasl = require "util.sasl".new;
local saslprep = require "util.encodings".stringprep.saslprep;
local secure_equals = require "util.hashes".equals;

local log = module._log;
local host = module.host;

local accounts = module:open_store("accounts");

-- define auth provider
local provider = {};

function provider.test_password(username, password)
	log("debug", "test password for user '%s'", username);
	local credentials = accounts:get(username) or {};
	password = saslprep(password);
	if not password then
		return nil, "Password fails SASLprep.";
	end

	if secure_equals(password, saslprep(credentials.password)) then
		return true;
	else
		return nil, "Auth failed. Invalid username or password.";
	end
end

function provider.get_password(username)
	log("debug", "get_password for username '%s'", username);
	return (accounts:get(username) or {}).password;
end

function provider.set_password(username, password)
	log("debug", "set_password for username '%s'", username);
	password = saslprep(password);
	if not password then
		return nil, "Password fails SASLprep.";
	end
	local account = accounts:get(username);
	if account then
		account.password = password;
		return accounts:set(username, account);
	end
	return nil, "Account not available.";
end

function provider.user_exists(username)
	local account = accounts:get(username);
	if not account then
		log("debug", "account not found for username '%s'", username);
		return nil, "Auth failed. Invalid username";
	end
	return true;
end

function provider.users()
	return accounts:users();
end

function provider.create_user(username, password)
	password = saslprep(password);
	if not password then
		return nil, "Password fails SASLprep.";
	end
	return accounts:set(username, {password = password});
end

function provider.delete_user(username)
	return accounts:set(username, nil);
end

function provider.get_sasl_handler()
	local getpass_authentication_profile = {
		plain = function(_, username, realm)
			local password = usermanager.get_password(username, realm);
			if not password then
				return "", nil;
			end
			return password, true;
		end
	};
	return new_sasl(host, getpass_authentication_profile);
end

module:provides("auth", provider);