ttmrichter:
On Wed, 2007-20-06 at 15:21 +1000, Donald Bruce Stewart wrote:
-- unsigned char *MD5(const unsigned char *d, unsigned long n, un signed char *md); foreign import ccall "openssl/md5.h MD5" c_md5 :: Ptr CChar -> CULong -> Ptr CChar -> IO (Ptr Word8)
ByteStrings were designed for this zero-copy passing of big data to C , by the way, so its a perfect fit.
I'm not so sure I like the idea of having to do this by
You don't *have* to do it via C, but you *can* do it, if you want.
passing it over to C. Crypto sounds like exactly the kind of application that would require the certainty of FP reasoning. Is there no way to make it work reasonably efficiently in Haskell proper?
Sure, why not? We've a good native code compiler, after all. Write an md5 over ByteString -- it should be pretty competitive. Here's a reference C implementation to start from: http://www.cse.unsw.edu.au/~dons/tmp/md5.c -- Don