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module Propellor.Gpg where
import System.IO
import System.FilePath
import System.Directory
import Data.Maybe
import Data.List.Utils
import Control.Monad
import System.Console.Concurrent
import System.Console.Concurrent.Internal (ConcurrentProcessHandle(..))
import Control.Applicative
import Prelude
import Propellor.PrivData.Paths
import Propellor.Message
import Propellor.Git.Config
import Utility.SafeCommand
import Utility.Process
import Utility.Monad
import Utility.Misc
import Utility.Tmp
import Utility.FileSystemEncoding
import Utility.Env
type KeyId = String
getGpgBin :: IO String
getGpgBin = do
gitGpgBin <- getGitConfigValue "gpg.program"
case gitGpgBin of
Nothing -> getEnvDefault "GNUPGBIN" "gpg"
Just b -> return b
keyring :: FilePath
keyring = privDataDir </> "keyring.gpg"
-- Lists the keys in propellor's keyring.
listPubKeys :: IO [KeyId]
listPubKeys = do
gpgbin <- getGpgBin
parse . lines <$> readProcess gpgbin listopts
where
listopts = useKeyringOpts ++ ["--with-colons", "--list-public-keys"]
parse = mapMaybe (keyIdField . split ":")
keyIdField ("pub":_:_:_:f:_) = Just f
keyIdField _ = Nothing
useKeyringOpts :: [String]
useKeyringOpts =
[ "--options"
, "/dev/null"
, "--no-default-keyring"
, "--keyring", keyring
]
addKey :: KeyId -> IO ()
addKey keyid = do
gpgbin <- getGpgBin
exitBool =<< allM (uncurry actionMessage)
[ ("adding key to propellor's keyring", addkeyring gpgbin)
, ("staging propellor's keyring", gitAdd keyring)
, ("updating encryption of any privdata", reencryptPrivData)
, ("configuring git commit signing to use key", gitconfig gpgbin)
, ("committing changes", gitCommitKeyRing "add-key")
]
where
addkeyring gpgbin' = do
createDirectoryIfMissing True privDataDir
boolSystem "sh"
[ Param "-c"
, Param $ gpgbin' ++ " --export " ++ keyid ++ " | gpg " ++
unwords (useKeyringOpts ++ ["--import"])
]
gitconfig gpgbin' = ifM (snd <$> processTranscript gpgbin' ["--list-secret-keys", keyid] Nothing)
( boolSystem "git"
[ Param "config"
, Param "user.signingkey"
, Param keyid
]
, do
warningMessage $ "Cannot find a secret key for key " ++ keyid ++ ", so not configuring git user.signingkey to use this key."
return True
)
rmKey :: KeyId -> IO ()
rmKey keyid = do
gpgbin <- getGpgBin
exitBool =<< allM (uncurry actionMessage)
[ ("removing key from propellor's keyring", rmkeyring gpgbin)
, ("staging propellor's keyring", gitAdd keyring)
, ("updating encryption of any privdata", reencryptPrivData)
, ("configuring git commit signing to not use key", gitconfig)
, ("committing changes", gitCommitKeyRing "rm-key")
]
where
rmkeyring gpgbin' = boolSystem gpgbin' $
(map Param useKeyringOpts) ++
[ Param "--batch"
, Param "--yes"
, Param "--delete-key", Param keyid
]
gitconfig = ifM ((==) (keyid++"\n", True) <$> processTranscript "git" ["config", "user.signingkey"] Nothing)
( boolSystem "git"
[ Param "config"
, Param "--unset"
, Param "user.signingkey"
]
, return True
)
reencryptPrivData :: IO Bool
reencryptPrivData = ifM (doesFileExist privDataFile)
( do
gpgEncrypt privDataFile =<< gpgDecrypt privDataFile
gitAdd privDataFile
, return True
)
gitAdd :: FilePath -> IO Bool
gitAdd f = boolSystem "git"
[ Param "add"
, File f
]
gitCommitKeyRing :: String -> IO Bool
gitCommitKeyRing action = do
-- Commit explicitly the keyring and privdata files, as other
-- changes may be staged by the user and shouldn't be committed.
tocommit <- filterM doesFileExist [ privDataFile, keyring]
gitCommit (Just ("propellor " ++ action)) (map File tocommit)
-- Adds --gpg-sign if there's a keyring.
gpgSignParams :: [CommandParam] -> IO [CommandParam]
gpgSignParams ps = ifM (doesFileExist keyring)
( return (ps ++ [Param "--gpg-sign"])
, return ps
)
-- Automatically sign the commit if there'a a keyring.
gitCommit :: Maybe String -> [CommandParam] -> IO Bool
gitCommit msg ps = do
let ps' = Param "commit" : ps ++
maybe [] (\m -> [Param "-m", Param m]) msg
ps'' <- gpgSignParams ps'
if isNothing msg
then do
(_, _, _, ConcurrentProcessHandle p) <- createProcessForeground $
proc "git" (toCommand ps'')
checkSuccessProcess p
else boolSystem "git" ps''
gpgDecrypt :: FilePath -> IO String
gpgDecrypt f = do
gpgbin <- getGpgBin
ifM (doesFileExist f)
( writeReadProcessEnv gpgbin ["--decrypt", f] Nothing Nothing (Just fileEncoding)
, return ""
)
-- Encrypt file to all keys in propellor's keyring.
gpgEncrypt :: FilePath -> String -> IO ()
gpgEncrypt f s = do
gpgbin <- getGpgBin
keyids <- listPubKeys
let opts =
[ "--default-recipient-self"
, "--armor"
, "--encrypt"
, "--trust-model", "always"
] ++ concatMap (\k -> ["--recipient", k]) keyids
encrypted <- writeReadProcessEnv gpgbin opts Nothing (Just writer) Nothing
viaTmp writeFile f encrypted
where
writer h = do
fileEncoding h
hPutStr h s
|
