Hi,

I have a problem with HMACSHA512 ComputeHash fnction. I need to get same
result on every computer that runs my software.

But I have got different result on two computers (on other 20 results are
correct). They are using same version, same function with same parameters
and this begin to happen this week.

Is this a bug?

What hash function will produce same result on different computers with
different OSs?

My code:

       public static string HashIt(byte[] hashKey, byte[] myKey,
HashEncryptionType hashType)
       {
           System.Security.Cryptography.HMAC hash;

           switch (hashType)
           {
               case HashEncryptionType.SHA1:
                   hash = new HMACSHA1(hashKey);
                   break;
               case HashEncryptionType.SHA256:
                   hash = new HMACSHA256(hashKey);
                   break;
               case HashEncryptionType.SHA384:
                   hash = new HMACSHA384(hashKey);
                   break;
               case HashEncryptionType.SHA512:
                   hash = new HMACSHA512(hashKey);
                   break;
               default:
                   hash = new HMACSHA512(hashKey);
                   break;
           }

           hash.ComputeHash(myKey);
           string hashedBytes = Convert.ToBase64String(hash.Hash);
           hash.Clear();

           return hashedBytes;
       }

Nikolay Unguzov