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  1. using System;
  2. using System.Security.Cryptography;
  3. using System.Text;
  4.  
  5. class Program
  6. {
  7.     static void Main()
  8.     {
  9.         string input = "password";
  10.  
  11.         // Generate SHA-256 hash without salt
  12.         string hashWithoutSalt = ComputeSha256Hash(input);
  13.         Console.WriteLine($"SHA-256 Hash (No Salt): {hashWithoutSalt}");
  14.  
  15.         // Generate salt
  16.         byte[] salt = GenerateSalt(32); // 32 bytes = 256 bits
  17.         Console.WriteLine($"Generated Salt (Base64): {Convert.ToBase64String(salt)}");
  18.  
  19.         // Generate SHA-256 hash with salt
  20.         string hashWithSalt = ComputeSha256HashWithSalt(input, salt);
  21.         Console.WriteLine($"SHA-256 Hash (With Salt): {hashWithSalt}");
  22.     }
  23.  
  24.     // SHA-256 hash without salt
  25.     static string ComputeSha256Hash(string rawData)
  26.     {
  27.         using SHA256 sha256Hash = SHA256.Create();
  28.         byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(rawData));
  29.         return Convert.ToHexString(bytes);
  30.     }
  31.  
  32.     // SHA-256 hash with salt
  33.     static string ComputeSha256HashWithSalt(string rawData, byte[] salt)
  34.     {
  35.         using SHA256 sha256Hash = SHA256.Create();
  36.         byte[] combined = Combine(Encoding.UTF8.GetBytes(rawData), salt);
  37.         byte[] hashBytes = sha256Hash.ComputeHash(combined);
  38.         return Convert.ToHexString(hashBytes);
  39.     }
  40.  
  41.     // Generate a cryptographically secure salt
  42.     static byte[] GenerateSalt(int size)
  43.     {
  44.         byte[] salt = new byte[size];
  45.         using RandomNumberGenerator rng = RandomNumberGenerator.Create();
  46.         rng.GetBytes(salt);
  47.         return salt;
  48.     }
  49.  
  50.     // Combine byte arrays
  51.     static byte[] Combine(byte[] first, byte[] second)
  52.     {
  53.         byte[] combined = new byte[first.Length + second.Length];
  54.         Buffer.BlockCopy(first, 0, combined, 0, first.Length);
  55.         Buffer.BlockCopy(second, 0, combined, first.Length, second.Length);
  56.         return combined;
  57.     }
  58. }
  59.  
Success #stdin #stdout 0.06s 32620KB
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stdout
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SHA-256 Hash (No Salt): 5E884898DA28047151D0E56F8DC6292773603D0D6AABBDD62A11EF721D1542D8
Generated Salt (Base64): s/nuZEos2dJ9V1qBQOb2iKtPL2gdrbxHN2RN3Eaj0Io=
SHA-256 Hash (With Salt): 228A2700DD63C08DD7FA1A42BDF38D435AC7F6630328CA050A61A3490E9CA65D
https://ideone.com/RnN8W7
language:
C# (NET 6.0)
created:
1 day ago
visibility:
public

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