55 lines
1.6 KiB
Haskell
55 lines
1.6 KiB
Haskell
module Propellor.Property.Ssh where
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import Propellor
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import qualified Propellor.Property.File as File
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import Propellor.Property.User
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import Utility.SafeCommand
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sshBool :: Bool -> String
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sshBool True = "yes"
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sshBool False = "no"
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sshdConfig :: FilePath
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sshdConfig = "/etc/ssh/sshd_config"
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setSshdConfig :: String -> Bool -> Property
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setSshdConfig setting allowed = combineProperties "sshd config"
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[ sshdConfig `File.lacksLine` (sshline $ not allowed)
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, sshdConfig `File.containsLine` (sshline allowed)
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]
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`onChange` restartSshd
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`describe` unwords [ "ssh config:", setting, sshBool allowed ]
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where
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sshline v = setting ++ " " ++ sshBool v
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permitRootLogin :: Bool -> Property
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permitRootLogin = setSshdConfig "PermitRootLogin"
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passwordAuthentication :: Bool -> Property
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passwordAuthentication = setSshdConfig "PasswordAuthentication"
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hasAuthorizedKeys :: UserName -> IO Bool
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hasAuthorizedKeys = go <=< homedir
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where
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go Nothing = return False
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go (Just home) = not . null <$> catchDefaultIO ""
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(readFile $ home </> ".ssh" </> "authorized_keys")
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restartSshd :: Property
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restartSshd = cmdProperty "service" ["ssh", "restart"]
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{- | Blow away existing host keys and make new ones. Use a flag
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- file to prevent doing this more than once. -}
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uniqueHostKeys :: Property
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uniqueHostKeys = flagFile prop "/etc/ssh/.unique_host_keys"
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`onChange` restartSshd
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where
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prop = Property "ssh unique host keys" $ do
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void $ boolSystem "sh"
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[ Param "-c"
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, Param "rm -f /etc/ssh/ssh_host_*"
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]
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ensureProperty $
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cmdProperty "/var/lib/dpkg/info/openssh-server.postinst"
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["configure"]
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