using System;

using System.Text;

using System.Security.Cryptography;

using CodeShare.Cryptography;       

​

public class Program

{

    public static void Main()

    {

        string inputValue = "abc";

        string expectedResult256 = "BA7816BF8F01CFEA414140DE5DAE2223B00361A396177A9CB410FF61F20015AD";

        string actualResult256 = SHA.GenerateSHA256String(inputValue);

​

        string expectedResult512 = "DDAF35A193617ABACC417349AE20413112E6FA4E89A97EA20A9EEEE64B55D39A2192992A274FC1A836BA3C23A3FEEBBD454D4423643CE80E2A9AC94FA54CA49F";

        string actualResult512 = SHA.GenerateSHA512String(inputValue);

        Console.WriteLine("256 Input:    " + inputValue);

        Console.WriteLine("256 Expected: " + expectedResult256);

        Console.WriteLine("256 Actual:   " + actualResult256);

        Console.WriteLine("256 Matches:  " + string.Equals(expectedResult256,actualResult256)); 

        Console.WriteLine();

        Console.WriteLine("512 Input:    " + inputValue);

        Console.WriteLine("512 Expected: " + expectedResult512);

        Console.WriteLine("512 Actual:   " + actualResult512);

        Console.WriteLine("512 Matches:  " + string.Equals(expectedResult512,actualResult512));

    }

}

​

namespace CodeShare.Cryptography

{

  public static class SHA

  {

    public static string GenerateSHA256String(string inputString)

    {

      SHA256 sha256 = SHA256Managed.Create();

      byte[] bytes = Encoding.UTF8.GetBytes(inputString);

      byte[] hash = sha256.ComputeHash(bytes);

      return GetStringFromHash(hash);

    }

​

    public static string GenerateSHA512String(string inputString)

    {

      SHA512 sha512 = SHA512Managed.Create();

      byte[] bytes = Encoding.UTF8.GetBytes(inputString);

      byte[] hash = sha512.ComputeHash(bytes);

      return GetStringFromHash(hash);

    }

    private static string GetStringFromHash(byte[] hash)

    {

        StringBuilder result = new StringBuilder();

​

        for (int i = 0; i < hash.Length; i++)

        {

            result.Append(hash[i].ToString("X2"));

        }

        return result.ToString();

    }

  }

}