[Haskell-cafe] haskell crypto is reaaaaaaaaaally slow
Donald Bruce Stewart
dons at cse.unsw.edu.au
Wed Jun 20 02:50:57 EDT 2007
> On Wed, 2007-20-06 at 15:21 +1000, Donald Bruce Stewart
> -- 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:
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