From 0f623044f485121e39a6389bb1511f9afb40cd20 Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@kitenet.net>
Date: Sun, 30 Mar 2014 19:11:24 -0400
Subject: [PATCH] propellor spin

---
 PrivData.hs | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 PrivData.hs

diff --git a/PrivData.hs b/PrivData.hs
new file mode 100644
index 0000000..c0c07fb
--- /dev/null
+++ b/PrivData.hs
@@ -0,0 +1,76 @@
+module PrivData where
+
+import qualified Data.Map as M
+import Control.Applicative
+import System.FilePath
+import System.IO
+import System.Directory
+import Data.Maybe
+import Control.Monad
+
+import Types
+import Utility.Monad
+import Utility.PartialPrelude
+import Utility.Exception
+import Utility.Process
+import Utility.Tmp
+import Utility.SafeCommand
+
+{- Note that removing or changing field names will break the
+ - serialized privdata files, so don't do that!
+ - It's fine to add new fields. -}
+data PrivDataField
+	= DockerAuthentication
+	| SshPrivKey UserName
+	| Password UserName
+	deriving (Read, Show, Ord, Eq)
+
+withPrivData :: PrivDataField -> (String -> IO Result) -> IO Result
+withPrivData field a = maybe missing a =<< getPrivData field
+  where
+	missing = do
+		hPutStrLn stderr $ "** Missing privdata " ++ show field
+		return FailedChange
+
+getPrivData :: PrivDataField -> IO (Maybe String)
+getPrivData field = do
+	m <- catchDefaultIO Nothing $ readish <$> readFile privDataLocal
+	return $ maybe Nothing (M.lookup field) m
+
+setPrivData :: HostName -> PrivDataField -> String -> IO ()
+setPrivData host field value = do
+	let f = privDataFile host
+	m <- fromMaybe M.empty . readish <$> gpgDecrypt f
+	let m' = M.insert field value m
+	gpgEncrypt f (show m')
+	void $ boolSystem "git" [Param "add", File f]
+
+privDataDir :: FilePath
+privDataDir = "privdata"
+
+privDataFile :: HostName -> FilePath
+privDataFile host = privDataDir </> host ++ ".gpg"
+
+privDataLocal :: FilePath
+privDataLocal = privDataDir </> "local"
+
+privDataMarker :: String
+privDataMarker = "PRIVDATA "
+
+gpgDecrypt :: FilePath -> IO String
+gpgDecrypt f = ifM (doesFileExist f)
+	( readProcess "gpg" ["--decrypt", f]
+	, return ""
+	)
+
+gpgEncrypt :: FilePath -> String -> IO ()
+gpgEncrypt f s = do
+	encrypted <- writeReadProcessEnv "gpg"
+		[ "--default-recipient-self"
+		, "--armor"
+		, "--encrypt"
+		]
+		Nothing
+		(Just $ flip hPutStr s)
+		Nothing
+	viaTmp writeFile f encrypted