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marmalade-upload-0.4: System/Keyring/Unix.hs

-- Copyright (c) 2014 Sebastian Wiesner <lunaryorn@gmail.com>

-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:

-- The above copyright notice and this permission notice shall be included in
-- all copies or substantial portions of the Software.

-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-- THE SOFTWARE.

{-# OPTIONS_HADDOCK hide #-}

-- |Access to keyrings of Unix systems.
module System.Keyring.Unix (getPassword,setPassword) where

import qualified System.Keyring.Unix.KDE as KDE

import System.Keyring.Types

import System.Environment (getEnv)

-- |The keyring provider to use.
provider :: IO (Service -> Username -> IO (Maybe Password)
               ,Service -> Username -> Password -> IO ())
provider = do
  desktop <- getEnv "XDG_CURRENT_DESKTOP"
  return $ case desktop of
    "KDE" -> (KDE.getPassword, KDE.setPassword)
    _ -> dummy
  where dummy = (\_ _ -> return Nothing, \_ _ _ -> return ())

-- |@'getPassword' service username@ gets a password from the current keyring.
getPassword :: Service -> Username -> IO (Maybe Password)
getPassword service username = do
  (get, _) <- provider
  get service username

-- |@'setPassword' service username password@ adds @password@ to the current
-- keyring.
setPassword :: Service -> Username -> Password -> IO ()
setPassword service username password = do
  (_, set) <- provider
  set service username password