Convert C# CUSTOM getSHA512 function into Ruby

Question

hello, I was wondering if someone could help me to get this method converted to ruby, is this possible at all?

public static string getSHA512(string str){
    UnicodeEncoding UE = new UnicodeEncoding();
    byte[] HashValue = null;
    byte[] MessageBytes = UE.GetBytes(str);
    System.Security.Cryptography.SHA512Managed SHhash = new System.Security.Cryptography.SHA512Managed();
    string strHex = "";
    HashValue = SHhash.ComputeHash(MessageBytes);
    foreach (byte b in HashValue){
        strHex += string.Format("{0:x2}", b);
    }
    return strHex;
}

Thanks in advance

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UPDATE:

I just would like to make it clear that unfortunately it's method is not just for SHA512 generation but a custom one. I believe that the Digest::SHA512.hexdigest would be just the SHHast instance, but if you carefully look for the method you can see that it differs a bit from a simple hash generation. Follows the result of both functions.

# in C#
getSHA512("hello") => "5165d592a6afe59f80d07436e35bd513b3055429916400a16c1adfa499c5a8ce03a370acdd4dc787d04350473bea71ea8345748578fc63ac91f8f95b6c140b93"

# in Ruby
Digest::SHA512.hexdigest("hello") || Digest::SHA2 => "9b71d224bd62f3785d96d46ad3ea3d73319bfbc2890caadae2dff72519673ca72323c3d99ba5c11d7c7acc6e14b8c5da0c4663475c2e5c3adef46f73bcdec043" 

Answer 1

Use the Digest::SHA2 class.