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module Propellor.Gpg where
import System.IO
import Data.Maybe
import Data.List.Utils
import Control.Monad
import Control.Applicative
import Prelude
import Propellor.PrivData.Paths
import Propellor.Message
import Propellor.Git.Config
import Utility.SafeCommand
import Utility.Process
import Utility.Process.NonConcurrent
import Utility.Monad
import Utility.Misc
import Utility.Tmp
import Utility.Env
import Utility.Directory
type KeyId = String
getGpgBin :: IO String
getGpgBin = do
gitGpgBin <- getGitConfigValue "gpg.program"
case gitGpgBin of
Nothing -> getEnvDefault "GNUPGBIN" "gpg"
Just b -> return b
-- Lists the keys in propellor's keyring.
listPubKeys :: IO [KeyId]
listPubKeys = do
keyring <- privDataKeyring
let listopts =
[ "--list-public-keys"
, "--with-colons"
, "--fixed-list-mode"
] ++ useKeyringOpts keyring
gpgbin <- getGpgBin
parse . lines <$> readProcess gpgbin listopts
where
parse = mapMaybe (extract . split ":")
extract ("pub":_:_:_:f:_) = Just f
extract _ = Nothing
-- Lists all of the user's secret keys.
listSecretKeys :: IO [(KeyId, String)]
listSecretKeys = do
gpgbin <- getGpgBin
parse . lines <$> readProcess gpgbin
[ "--list-secret-keys"
, "--with-colons"
, "--fixed-list-mode"
]
where
parse = extract [] Nothing . map (split ":")
extract c (Just keyid) (("uid":_:_:_:_:_:_:_:_:userid:_):rest) =
extract ((keyid, userid):c) Nothing rest
extract c (Just keyid) rest@(("sec":_):_) =
extract ((keyid, ""):c) Nothing rest
extract c (Just keyid) rest@(("pub":_):_) =
extract ((keyid, ""):c) Nothing rest
extract c (Just keyid) (_:rest) =
extract c (Just keyid) rest
extract c _ [] = c
extract c _ (("sec":_:_:_:keyid:_):rest) =
extract c (Just keyid) rest
extract c k (_:rest) =
extract c k rest
useKeyringOpts :: FilePath -> [String]
useKeyringOpts keyring =
[ "--options"
, "/dev/null"
, "--no-default-keyring"
, "--keyring", keyring
]
addKey :: KeyId -> IO ()
addKey keyid = do
gpgbin <- getGpgBin
keyring <- privDataKeyring
exitBool =<< allM (uncurry actionMessage)
[ ("adding key to propellor's keyring", addkeyring keyring 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 keyring' gpgbin' = do
createDirectoryIfMissing True privDataDir
boolSystem "sh"
[ Param "-c"
, Param $ gpgbin' ++ " --export " ++ keyid ++ " | gpg " ++
unwords (useKeyringOpts keyring' ++ ["--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
keyring <- privDataKeyring
exitBool =<< allM (uncurry actionMessage)
[ ("removing key from propellor's keyring", rmkeyring keyring 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 keyring' gpgbin' = boolSystem gpgbin' $
(map Param (useKeyringOpts keyring')) ++
[ 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 = do
f <- privDataFile
ifM (doesFileExist f)
( do
gpgEncrypt f =<< gpgDecrypt f
gitAdd f
, return True
)
gitAdd :: FilePath -> IO Bool
gitAdd f = boolSystem "git"
[ Param "add"
, File f
]
gitCommitKeyRing :: String -> IO Bool
gitCommitKeyRing action = do
keyring <- privDataKeyring
privdata <- privDataFile
-- Commit explicitly the keyring and privdata files, as other
-- changes may be staged by the user and shouldn't be committed.
tocommit <- filterM doesFileExist [ privdata, keyring]
gitCommit (Just ("propellor " ++ action)) (map File tocommit)
-- Adds --gpg-sign if there's a keyring.
gpgSignParams :: [CommandParam] -> IO [CommandParam]
gpgSignParams ps = do
keyring <- privDataKeyring
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'
boolSystemNonConcurrent "git" ps''
gpgDecrypt :: FilePath -> IO String
gpgDecrypt f = do
gpgbin <- getGpgBin
ifM (doesFileExist f)
( writeReadProcessEnv gpgbin ["--decrypt", f] Nothing Nothing Nothing
, 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 = hPutStr h s
|
