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|
{- git-annex command
-
- Copyright 2016 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Command.EnableTor where
import Command
import qualified Annex
import P2P.Address
import Utility.Tor
import Annex.UUID
import Config.Files
import P2P.IO
import qualified P2P.Protocol as P2P
import Utility.ThreadScheduler
import Control.Concurrent.Async
import qualified Network.Socket as S
#ifndef mingw32_HOST_OS
import Utility.Su
import System.Posix.User
#endif
cmd :: Command
cmd = noCommit $ dontCheck repoExists $
command "enable-tor" SectionSetup "enable tor hidden service"
"uid" (withParams seek)
seek :: CmdParams -> CommandSeek
seek = withWords start
-- This runs as root, so avoid making any commits or initializing
-- git-annex, or doing other things that create root-owned files.
start :: [String] -> CommandStart
start os = do
uuid <- getUUID
when (uuid == NoUUID) $
giveup "This can only be run in a git-annex repository."
#ifndef mingw32_HOST_OS
curruserid <- liftIO getEffectiveUserID
if curruserid == 0
then case readish =<< headMaybe os of
Nothing -> giveup "Need user-id parameter."
Just userid -> go uuid userid
else do
showStart "enable-tor" ""
showLongNote "Need root access to enable tor..."
gitannex <- liftIO readProgramFile
let ps = [Param (cmdname cmd), Param (show curruserid)]
ifM (liftIO $ runAsRoot gitannex ps)
( next $ next checkHiddenService
, giveup $ unwords $
[ "Failed to run as root:" , gitannex ] ++ toCommand ps
)
#else
go uuid 0
#endif
where
go uuid userid = do
(onionaddr, onionport) <- liftIO $
addHiddenService torAppName userid (fromUUID uuid)
storeP2PAddress $ TorAnnex onionaddr onionport
stop
checkHiddenService :: CommandCleanup
checkHiddenService = bracket setup cleanup go
where
setup = do
showLongNote "Tor hidden service is configured. Checking connection to it. This may take a few minutes."
startlistener
cleanup = liftIO . cancel
go _ = check (150 :: Int) =<< filter istoraddr <$> loadP2PAddresses
istoraddr (TorAnnex _ _) = True
check 0 _ = giveup "Still unable to connect to hidden service. It might not yet be usable by others. Please check Tor's logs for details."
check _ [] = giveup "Somehow didn't get an onion address."
check n addrs@(addr:_) = do
g <- Annex.gitRepo
-- Connect but don't bother trying to auth,
-- we just want to know if the tor circuit works.
cv <- liftIO $ tryNonAsync $ connectPeer g addr
case cv of
Left e -> do
warning $ "Unable to connect to hidden service. It may not yet have propigated to the Tor network. (" ++ show e ++ ") Will retry.."
liftIO $ threadDelaySeconds (Seconds 2)
check (n-1) addrs
Right conn -> do
liftIO $ closeConnection conn
showLongNote "Tor hidden service is working."
return True
-- Unless the remotedaemon is already listening on the hidden
-- service's socket, start a listener. This is only run during the
-- check, and it refuses all auth attempts.
startlistener = do
r <- Annex.gitRepo
u <- getUUID
uid <- liftIO getRealUserID
let ident = fromUUID u
v <- liftIO $ getHiddenServiceSocketFile torAppName uid ident
case v of
Just sockfile -> ifM (liftIO $ haslistener sockfile)
( liftIO $ async $ return ()
, liftIO $ async $ runlistener sockfile u r
)
Nothing -> giveup "Could not find socket file in Tor configuration!"
runlistener sockfile u r = serveUnixSocket sockfile $ \h -> do
let conn = P2PConnection
{ connRepo = r
, connCheckAuth = const False
, connIhdl = h
, connOhdl = h
}
void $ runNetProto conn $ P2P.serveAuth u
hClose h
haslistener sockfile = catchBoolIO $ do
soc <- S.socket S.AF_UNIX S.Stream S.defaultProtocol
S.connect soc (S.SockAddrUnix sockfile)
S.close soc
return True
|
