Question

I’m re-writing a Rails web app in C#. I’m really stuck with Ruby’s hash function:

# Generates a 128 character hash
def Password.hash(password,salt)
  Digest::SHA512.hexdigest("#{password}:#{salt}")
end

The following C# function gives a different result:

 private static string Hash(string password, string salt)
 {
     return BitConverter.ToString(new SHA512CryptoServiceProvider().ComputeHash(Encoding.UTF8.GetBytes(password + ":" + salt))).Replace("-", "").ToLower();
 }

What am I doing wrong?

Thank you

Answer 1

Never mind. The results actually ARE the same. So if you ever need to convert Ruby’s hashing to C#,

Digest::SHA512.hexdigest(some_string)

does the same as

BitConverter.ToString(new SHA512CryptoServiceProvider().ComputeHash(Encoding.UTF8.GetBytes(someString))).Replace("-", "").ToLower();

C# is a lot more verbose, but the main thing is that it works! 🙂