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{-# LANGUAGE ScopedTypeVariables #-}
module OpenSSL.X509.SystemStore.Unix
( contextLoadSystemCerts
) where
import OpenSSL.Session (SSLContext, contextSetCADirectory, contextSetCAFile)
import qualified System.Posix.Files as U
import Control.Exception (try, IOException)
import System.IO.Unsafe (unsafePerformIO)
contextLoadSystemCerts :: SSLContext -> IO ()
contextLoadSystemCerts =
unsafePerformIO $ loop defaultSystemPaths
where
loop ((isDir, path) : rest) = do
mst <- try $ U.getFileStatus path
:: IO (Either IOException U.FileStatus)
case mst of
Right st | isDir, U.isDirectory st ->
return (flip contextSetCADirectory path)
Right st | not isDir, U.isRegularFile st ->
return (flip contextSetCAFile path)
_ -> loop rest
loop [] = return (const $ return ()) -- throw an exception instead?
{-# NOINLINE contextLoadSystemCerts #-}
-- A True value indicates that the path must be a directory.
-- According to [1], the fedora path should be tried before /etc/ssl/certs
-- because of [2].
--
-- [1] https://www.happyassassin.net/2015/01/12/a-note-about-ssltls-trusted-certificate-stores-and-platforms/
-- [2] https://bugzilla.redhat.com/show_bug.cgi?id=1053882
defaultSystemPaths :: [(Bool, FilePath)]
defaultSystemPaths =
[ (False, "/etc/pki/tls/certs/ca-bundle.crt" ) -- red hat, fedora, centos
, (True , "/etc/ssl/certs" ) -- other linux, netbsd
, (True , "/system/etc/security/cacerts" ) -- android
, (False, "/etc/ssl/cert.pem" ) -- openbsd/freebsd
, (False, "/usr/share/ssl/certs/ca-bundle.crt" ) -- older red hat
, (False, "/usr/local/share/certs/ca-root-nss.crt") -- freebsd (security/ca-root-nss)
, (True , "/usr/local/share/certs" ) -- freebsd
]
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