Simple HashUtility useful for password encryption based on PBKDF2 algorithm

HashUtility.cs

// https://en.wikipedia.org/wiki/PBKDF2

using Microsoft.AspNetCore.Cryptography.KeyDerivation;
using System;
using System.Security.Cryptography;

namespace Utils
{
		public class HashUtility
		{
				const int saltSize = 128 / 8;
				const int outputKeySize = 128 / 8;
				const int numberOfIterations = 100000;

				public HashUtility() { }

				public string MakeHash( string text, string saltText )
				{
						byte[] salt = Convert.FromBase64String( saltText );

						return MakeHash( text, salt );
				}

				public string MakeHash( string text, byte[] salt = null )
				{
						if( salt == null ) salt = HashUtility.CreateSalt();

						var derivedKey = KeyDerivation.Pbkdf2( text, salt, KeyDerivationPrf.HMACSHA256, numberOfIterations, outputKeySize );

						return Convert.ToBase64String( derivedKey );
				}

				public static byte[] CreateSalt()
				{
						var salt = new byte[saltSize];

						using( var rng = RandomNumberGenerator.Create() )
						{
								rng.GetBytes( salt );

								return salt;
						}
				}

				public static byte[] CreateSalt( string saltText )
				{
						return Convert.FromBase64String( saltText );
				}
		}
}