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.FileSystemEncoding 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 map fst <$> listKeys ("--list-public-keys" : useKeyringOpts keyring) listSecretKeys :: IO [(KeyId, String)] listSecretKeys = listKeys ["--list-secret-keys"] listKeys :: [String] -> IO [(KeyId, String)] listKeys ps = do gpgbin <- getGpgBin parse . lines <$> readProcess gpgbin listopts where listopts = ps ++ ["--with-colons"] parse = mapMaybe (keyIdField . split ":") keyIdField (t:_:_:_:f:_:_:_:_:n:_) | t == "pub" || t == "sec" = Just (f, n) keyIdField _ = Nothing 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 (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