Clean up casts

Use unsigned char buffers more pervasively throughout the code. This
removes most calls to `asCUCharBuf`, isolating `unsafeCoerce` further.
By making some type signatures slightly more flexible, also eliminate
most explicit integer conversions.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/System/Random/Crypto.hs b/src/System/Random/Crypto.hs
index ca2fba5..903f7aa 100644
--- a/src/System/Random/Crypto.hs
+++ b/src/System/Random/Crypto.hs
@@ -17,15 +17,14 @@ module System.Random.Crypto
   ) where
 
 import Data.ByteString (ByteString)
-import qualified Data.ByteString as ByteString
 import Foreign (allocaArray)
 
 import BTLS.BoringSSL.Rand (randBytes)
-import BTLS.Cast (asCUCharBuf)
+import BTLS.Buffer (packCUStringLen)
 
 -- | Generates a cryptographically random buffer of the specified size.
 randomBytes :: Int -> IO ByteString
 randomBytes len =
   allocaArray len $ \pBuf -> do
-    randBytes (asCUCharBuf pBuf) (fromIntegral len)
-    ByteString.packCStringLen (pBuf, len)
+    randBytes pBuf (fromIntegral len)
+    packCUStringLen (pBuf, len)