596af7cbc4
Needs to be in Net not Local, so that Net actions can take the protocol version into account. This commit was sponsored by an anonymous bitcoin donor.
134 lines
3.9 KiB
Haskell
134 lines
3.9 KiB
Haskell
{- git-annex command
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-
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- Copyright 2016 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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{-# LANGUAGE CPP #-}
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module Command.EnableTor where
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import Command
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import qualified Annex
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import P2P.Address
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import P2P.Annex
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import Utility.Tor
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import Annex.UUID
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#ifndef mingw32_HOST_OS
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import Config.Files
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#endif
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import P2P.IO
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import qualified P2P.Protocol as P2P
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import Utility.ThreadScheduler
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import RemoteDaemon.Transport.Tor
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import Control.Concurrent.Async
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import qualified Network.Socket as S
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#ifndef mingw32_HOST_OS
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import Utility.Su
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import System.Posix.User
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#endif
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cmd :: Command
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cmd = noCommit $ dontCheck repoExists $
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command "enable-tor" SectionSetup "enable tor hidden service"
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"uid" (withParams seek)
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seek :: CmdParams -> CommandSeek
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seek = withWords start
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-- This runs as root, so avoid making any commits or initializing
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-- git-annex, or doing other things that create root-owned files.
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start :: [String] -> CommandStart
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start os = do
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uuid <- getUUID
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when (uuid == NoUUID) $
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giveup "This can only be run in a git-annex repository."
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#ifndef mingw32_HOST_OS
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curruserid <- liftIO getEffectiveUserID
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if curruserid == 0
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then case readish =<< headMaybe os of
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Nothing -> giveup "Need user-id parameter."
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Just userid -> go uuid userid
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else do
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showStart' "enable-tor" Nothing
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gitannex <- liftIO readProgramFile
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let ps = [Param (cmdname cmd), Param (show curruserid)]
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sucommand <- liftIO $ mkSuCommand gitannex ps
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maybe noop showLongNote
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(describePasswordPrompt' sucommand)
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ifM (liftIO $ runSuCommand sucommand)
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( next $ next checkHiddenService
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, giveup $ unwords $
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[ "Failed to run as root:" , gitannex ] ++ toCommand ps
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)
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#else
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go uuid 0
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#endif
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where
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go uuid userid = do
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(onionaddr, onionport) <- liftIO $
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addHiddenService torAppName userid (fromUUID uuid)
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storeP2PAddress $ TorAnnex onionaddr onionport
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stop
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checkHiddenService :: CommandCleanup
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checkHiddenService = bracket setup cleanup go
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where
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setup = do
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showLongNote "Tor hidden service is configured. Checking connection to it. This may take a few minutes."
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startlistener
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cleanup = liftIO . cancel
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go _ = check (150 :: Int) =<< filter istoraddr <$> loadP2PAddresses
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istoraddr (TorAnnex _ _) = True
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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."
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check _ [] = giveup "Somehow didn't get an onion address."
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check n addrs@(addr:_) = do
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g <- Annex.gitRepo
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-- Connect but don't bother trying to auth,
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-- we just want to know if the tor circuit works.
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liftIO (tryNonAsync $ connectPeer g addr) >>= \case
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Left e -> do
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warning $ "Unable to connect to hidden service. It may not yet have propigated to the Tor network. (" ++ show e ++ ") Will retry.."
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liftIO $ threadDelaySeconds (Seconds 2)
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check (n-1) addrs
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Right conn -> do
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liftIO $ closeConnection conn
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showLongNote "Tor hidden service is working."
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return True
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-- Unless the remotedaemon is already listening on the hidden
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-- service's socket, start a listener. This is only run during the
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-- check, and it refuses all auth attempts.
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startlistener = do
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r <- Annex.gitRepo
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u <- getUUID
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msock <- torSocketFile
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case msock of
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Just sockfile -> ifM (liftIO $ haslistener sockfile)
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( liftIO $ async $ return ()
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, liftIO $ async $ runlistener sockfile u r
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)
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Nothing -> giveup "Could not find socket file in Tor configuration!"
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runlistener sockfile u r = serveUnixSocket sockfile $ \h -> do
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let conn = P2PConnection
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{ connRepo = r
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, connCheckAuth = const False
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, connIhdl = h
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, connOhdl = h
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}
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runst <- mkRunState Client
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void $ runNetProto runst conn $ P2P.serveAuth u
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hClose h
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haslistener sockfile = catchBoolIO $ do
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soc <- S.socket S.AF_UNIX S.Stream S.defaultProtocol
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S.connect soc (S.SockAddrUnix sockfile)
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S.close soc
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return True
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