2aa4fab62a
Including the non-standard URI form that git-remote-gcrypt uses for rsync. Eg, "ook://foo:bar" cannot be parsed because "bar" is not a valid port number. But git could have a remote with that, it would try to run git-remote-ook to handle it. So, git-annex has to allow for such things, rather than crashing. This commit was sponsored by Luke Shumaker on Patreon.
118 lines
3.6 KiB
Haskell
118 lines
3.6 KiB
Haskell
{- git-remote-gcrypt support
|
|
-
|
|
- https://spwhitton.name/tech/code/git-remote-gcrypt/
|
|
-
|
|
- Copyright 2013 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
{-# LANGUAGE OverloadedStrings #-}
|
|
|
|
module Git.GCrypt where
|
|
|
|
import Common
|
|
import Git.Types
|
|
import Git.Construct
|
|
import qualified Git.Config as Config
|
|
import qualified Git.Command as Command
|
|
import Utility.Gpg
|
|
|
|
import qualified Data.ByteString as S
|
|
|
|
urlScheme :: String
|
|
urlScheme = "gcrypt:"
|
|
|
|
urlPrefix :: String
|
|
urlPrefix = urlScheme ++ ":"
|
|
|
|
isEncrypted :: Repo -> Bool
|
|
isEncrypted Repo { location = Url url } = urlPrefix `isPrefixOf` show url
|
|
isEncrypted Repo { location = UnparseableUrl url } = urlPrefix `isPrefixOf` url
|
|
isEncrypted _ = False
|
|
|
|
{- The first Repo is the git repository that has the second Repo
|
|
- as one of its remotes.
|
|
-
|
|
- When the remote Repo uses gcrypt, returns the actual underlying
|
|
- git repository that gcrypt is using to store its data.
|
|
-
|
|
- Throws an exception if the repo does not use gcrypt.
|
|
-}
|
|
encryptedRemote :: Repo -> Repo -> IO Repo
|
|
encryptedRemote baserepo = go
|
|
where
|
|
go Repo { location = Url url } = go' (show url)
|
|
go Repo { location = UnparseableUrl url } = go' url
|
|
go _ = notencrypted
|
|
|
|
go' u
|
|
| urlPrefix `isPrefixOf` u =
|
|
fromRemoteLocation (drop plen u) baserepo
|
|
| otherwise = notencrypted
|
|
|
|
notencrypted = giveup "not a gcrypt encrypted repository"
|
|
|
|
plen = length urlPrefix
|
|
|
|
data ProbeResult = Decryptable | NotDecryptable | NotEncrypted
|
|
|
|
{- Checks if the git repo at a location uses gcrypt.
|
|
-
|
|
- Rather expensive -- many need to fetch the entire repo contents.
|
|
- (Which is fine if the repo is going to be added as a remote..)
|
|
-}
|
|
probeRepo :: String -> Repo -> IO ProbeResult
|
|
probeRepo loc baserepo = do
|
|
let p = proc "git" $ toCommand $ Command.gitCommandLine
|
|
[ Param "remote-gcrypt"
|
|
, Param "--check"
|
|
, Param loc
|
|
] baserepo
|
|
withCreateProcess p $ \_ _ _ pid -> do
|
|
code <- waitForProcess pid
|
|
return $ case code of
|
|
ExitSuccess -> Decryptable
|
|
ExitFailure 1 -> NotDecryptable
|
|
ExitFailure _ -> NotEncrypted
|
|
|
|
type GCryptId = String
|
|
|
|
{- gcrypt gives each encrypted repository a uique gcrypt-id,
|
|
- which is stored in the repository (in encrypted form)
|
|
- and cached in a per-remote gcrypt-id configuration setting. -}
|
|
remoteRepoId :: Repo -> Maybe RemoteName -> Maybe GCryptId
|
|
remoteRepoId r n = fromConfigValue <$> getRemoteConfig "gcrypt-id" r n
|
|
|
|
getRemoteConfig :: S.ByteString -> Repo -> Maybe RemoteName -> Maybe ConfigValue
|
|
getRemoteConfig field repo remotename = do
|
|
n <- remotename
|
|
Config.getMaybe (remoteConfigKey field n) repo
|
|
|
|
{- Gpg keys that the remote is encrypted for.
|
|
- If empty, gcrypt uses --default-recipient-self -}
|
|
getParticiantList :: Maybe Repo -> Repo -> Maybe RemoteName -> KeyIds
|
|
getParticiantList globalconfigrepo repo remotename = KeyIds $ parse $ firstJust
|
|
[ getRemoteConfig "gcrypt-participants" repo remotename
|
|
, Config.getMaybe defaultkey repo
|
|
, Config.getMaybe defaultkey =<< globalconfigrepo
|
|
]
|
|
where
|
|
defaultkey = "gcrypt.participants"
|
|
parse (Just (ConfigValue "simple")) = []
|
|
parse (Just (ConfigValue b)) = words (decodeBS' b)
|
|
parse (Just NoConfigValue) = []
|
|
parse Nothing = []
|
|
|
|
remoteParticipantConfigKey :: RemoteName -> ConfigKey
|
|
remoteParticipantConfigKey = remoteConfigKey "gcrypt-participants"
|
|
|
|
remotePublishParticipantConfigKey :: RemoteName -> ConfigKey
|
|
remotePublishParticipantConfigKey = remoteConfigKey "gcrypt-publish-participants"
|
|
|
|
remoteSigningKey :: RemoteName -> ConfigKey
|
|
remoteSigningKey = remoteConfigKey "gcrypt-signingkey"
|
|
|
|
remoteConfigKey :: S.ByteString -> RemoteName -> ConfigKey
|
|
remoteConfigKey key remotename = ConfigKey $
|
|
"remote." <> encodeBS' remotename <> "." <> key
|