module Propellor.Gpg where import Control.Applicative import System.IO import System.FilePath import System.Directory import Data.Maybe import Data.List.Utils import Propellor.PrivData.Paths import Propellor.Message import Utility.SafeCommand import Utility.Process import Utility.Monad import Utility.Misc import Utility.Tmp import Utility.FileSystemEncoding type KeyId = String keyring :: FilePath keyring = privDataDir "keyring.gpg" -- Lists the keys in propellor's keyring. listPubKeys :: IO [KeyId] listPubKeys = parse . lines <$> readProcess "gpg" 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 = exitBool =<< allM (uncurry actionMessage) [ ("adding key to propellor's keyring", addkeyring) , ("staging propellor's keyring", gitAdd keyring) , ("updating encryption of any privdata", reencryptPrivData) , ("configuring git signing to use key", gitconfig) , ("committing changes", gitCommitKeyRing "add-key") ] where addkeyring = do createDirectoryIfMissing True privDataDir boolSystem "sh" [ Param "-c" , Param $ "gpg --export " ++ keyid ++ " | gpg " ++ unwords (useKeyringOpts ++ ["--import"]) ] gitconfig = ifM (snd <$> processTranscript "gpg" ["--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 = exitBool =<< allM (uncurry actionMessage) [ ("removing key from propellor's keyring", rmkeyring) , ("staging propellor's keyring", gitAdd keyring) , ("updating encryption of any privdata", reencryptPrivData) , ("committing changes", gitCommitKeyRing "rm-key") ] where rmkeyring = boolSystem "gpg" $ (map Param useKeyringOpts) ++ [Param "--delete-key", Param keyid] 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 = gitCommit [ File keyring , File privDataFile , Param "-m" , Param ("propellor " ++ action) ] -- 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 :: [CommandParam] -> IO Bool gitCommit ps = do ps' <- gpgSignParams ps boolSystem "git" (Param "commit" : ps') gpgDecrypt :: FilePath -> IO String gpgDecrypt f = ifM (doesFileExist f) ( writeReadProcessEnv "gpg" ["--decrypt", f] Nothing Nothing (Just fileEncoding) , return "" ) -- Encrypt file to all keys in propellor's keyring. gpgEncrypt :: FilePath -> String -> IO () gpgEncrypt f s = do keyids <- listPubKeys let opts = [ "--default-recipient-self" , "--armor" , "--encrypt" , "--trust-model", "always" ] ++ concatMap (\k -> ["--recipient", k]) keyids encrypted <- writeReadProcessEnv "gpg" opts Nothing (Just writer) Nothing viaTmp writeFile f encrypted where writer h = do fileEncoding h hPutStr h s