I think you're absolutely right to be concerned about the reimplementation of any sort of crypto, for exactly the right reasons. However, have you ever looked

I think you're absolutely right to be concerned about the reimplementation of any sort of crypto, for exactly the right reasons. However, have you ever looked at the OpenSSL code? It's insane. I presume it's ended up that way because people have the same fear of introducing a vulnerability. At some point, someone needs to fix it.