bunch of fixes

Toolkit.Foundation/PasswordHasher.cs

@@ -0,0 +1,19 @@
+using System.Security.Cryptography;
+
+namespace Toolkit.Foundation;
+
+public class PasswordHasher : 
+    IPasswordHasher
+{
+    private const int SaltSize = 16;
+
+    public string HashPassword(string password, int iterations = 10000)
+    {
+        using Rfc2898DeriveBytes pbkdf2 = new(password, SaltSize, iterations, HashAlgorithmName.SHA256);
+
+        byte[] salt = pbkdf2.Salt;
+        byte[] hash = pbkdf2.GetBytes(32);
+
+        return $"{Convert.ToBase64String(salt)}:{Convert.ToBase64String(hash)}";
+    }
+}