-- sasl.lua v0.4

-- Copyright (C) 2008-2009 Tobias Markmann

--

--    All rights reserved.

--

--    Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

--

--        * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

--        * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

--        * Neither the name of Tobias Markmann nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

--

--    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

local md5 = require "util.hashes".md5;

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

local tostring = tostring;

local st = require "util.stanza";

local generate_uuid = require "util.uuid".generate;

local t_insert, t_concat = table.insert, table.concat;

local to_byte, to_char = string.byte, string.char;

local to_unicode = require "util.encodings".idna.to_unicode;

local s_match = string.match;

local gmatch = string.gmatch

local string = string

local math = require "math"

local type = type

local error = error

local print = print

local setmetatable = setmetatable;

local assert = assert;

module "sasl"

local mechanisms = {};

local backend_mechanism = {};

-- register a new SASL mechanims

local function registerMechanism(name, backends, f)

	assert(type(name) == "string", "Parameter name MUST be a string.");

	assert(type(backends) == "string" or type(backends) == "table", "Parameter backends MUST be either a string or a table.");

	assert(type(f) == "function", "Parameter f MUST be a function.");

end

-- create a new SASL object which can be used to authenticate clients

function new(realm, profile)

	return setmetatable(sasl_i, method);

end

-- get a list of possible SASL mechanims to use

function method:mechanisms()

end

-- select a mechanism to use

end

return _M;