1 files changed, 18 insertions, 2 deletions

diff --git a/Data/OpenPGP/Util/Fingerprint.hs b/Data/OpenPGP/Util/Fingerprint.hs
index 538688b..20b6e72 100644
--- a/Data/OpenPGP/Util/Fingerprint.hs
+++ b/Data/OpenPGP/Util/Fingerprint.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 module Data.OpenPGP.Util.Fingerprint (fingerprint) where
 
 import qualified Data.OpenPGP as OpenPGP
@@ -7,17 +8,32 @@ import Data.Char (toUpper)
 import Data.Word (Word8)
 import Numeric (showHex)
 
+#if defined(VERSION_cryptonite)
+import Crypto.Hash.Algorithms
+import Crypto.Hash
+import qualified Data.ByteArray as Bytes
+#else
 import Crypto.Hash.MD5 as MD5
 import Crypto.Hash.SHA1 as SHA1
+#endif
 
 -- | Generate a key fingerprint from a PublicKeyPacket or SecretKeyPacket
 -- <http://tools.ietf.org/html/rfc4880#section-12.2>
 fingerprint :: OpenPGP.Packet -> String
 fingerprint p
-    | OpenPGP.version p == 4 = hexify $ SHA1.hashlazy material
-    | OpenPGP.version p `elem` [2, 3] = hexify $ MD5.hashlazy material
+    | OpenPGP.version p == 4 = hexify $ sha1 material
+    | OpenPGP.version p `elem` [2, 3] = hexify $ md5 material
     | otherwise = error "Unsupported Packet version or type in fingerprint"
     where
+
+#if defined(VERSION_cryptonite)
+    sha1 x = Bytes.convert (hashlazy x :: Digest SHA1)
+    md5 x = Bytes.convert (hashlazy x :: Digest MD5)
+#else
+    sha1 = SHA1.hashlazy
+    md5 = MD5.hashlazy
+#endif
+
     material = LZ.concat $ OpenPGP.fingerprint_material p
 
     hexify = map toUpper . hexString . BS.unpack