util.pluginloader: Return full file path from internal file loader on success, not...

[prosody.git] / util / sasl.lua

diff --git a/util/sasl.lua b/util/sasl.lua
index b2dd4034505c8149d2711a3c15d371ce57f92735..17d10b804b7b9188a434d2dfe669db078912b905 100644 (file)
--- a/util/sasl.lua
+++ b/util/sasl.lua
@@ -1,5 +1,5 @@
 -- sasl.lua v0.4
--- Copyright (C) 2008-2009 Tobias Markmann
+-- Copyright (C) 2008-2010 Tobias Markmann
 --
 --    All rights reserved.
 --
@@ -12,27 +12,25 @@
 --    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 pairs, ipairs = pairs, ipairs;
+local t_insert = table.insert;
 local type = type
-local error = error
-local print = print
 local setmetatable = setmetatable;
 local assert = assert;
+local require = require;
 
 module "sasl"
 
-local method = {}
+--[[
+Authentication Backend Prototypes:
+
+state = false : disabled
+state = true : enabled
+state = nil : non-existant
+]]
+
+local method = {};
+method.__index = method;
 local mechanisms = {};
 local backend_mechanism = {};
 
@@ -41,25 +39,58 @@ 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.");
-       mechanism[name] = f
-       for _, backend_name in ipairs(backend)
+       mechanisms[name] = f
+       for _, backend_name in ipairs(backends) do
+               if backend_mechanism[backend_name] == nil then backend_mechanism[backend_name] = {}; end
+               t_insert(backend_mechanism[backend_name], name);
+       end
 end
 
 -- create a new SASL object which can be used to authenticate clients
 function new(realm, profile)
-       sasl_i = {};
-       
-       return setmetatable(sasl_i, method);
+       local mechanisms = profile.mechanisms;
+       if not mechanisms then
+               mechanisms = {};
+               for backend, f in pairs(profile) do
+                       if backend_mechanism[backend] then
+                               for _, mechanism in ipairs(backend_mechanism[backend]) do
+                                       mechanisms[mechanism] = true;
+                               end
+                       end
+               end
+               profile.mechanisms = mechanisms;
+       end
+       return setmetatable({ profile = profile, realm = realm, mechs = mechanisms }, method);
+end
+
+-- get a fresh clone with the same realm and profile
+function method:clean_clone()
+       return new(self.realm, self.profile)
 end
 
 -- get a list of possible SASL mechanims to use
 function method:mechanisms()
-
+       return self.mechs;
 end
 
 -- select a mechanism to use
-function method.select( mechanism )
+function method:select(mechanism)
+       if not self.selected and self.mechs[mechanism] then
+               self.selected = mechanism;
+               return true;
+       end
+end
 
+-- feed new messages to process into the library
+function method:process(message)
+       --if message == "" or message == nil then return "failure", "malformed-request" end
+       return mechanisms[self.selected](self, message);
 end
 
+-- load the mechanisms
+require "util.sasl.plain"     .init(registerMechanism);
+require "util.sasl.digest-md5".init(registerMechanism);
+require "util.sasl.anonymous" .init(registerMechanism);
+require "util.sasl.scram"     .init(registerMechanism);
+
 return _M;