Security.cs

using Microsoft.AspNetCore.DataProtection;

public interface ICipherService
{
    string Encrypt(string cipherText);
    string Decrypt(string cipherText);
}

public class Security : ICipherService
{
    //Method 1 Two Way-----------------------------------------------------------------------
    private readonly IDataProtectionProvider _dataProtectionProvider;
    private const string Key = "cut-the-night-with-the-light";

    public Security(IDataProtectionProvider dataProtectionProvider)
    {
        _dataProtectionProvider = dataProtectionProvider;
    }

    public string Encrypt(string input)
    {
        var protector = _dataProtectionProvider.CreateProtector(Key);
        return protector.Protect(input);
    }

    public string Decrypt(string input)
    {
        var protector = _dataProtectionProvider.CreateProtector(Key);
        return protector.Unprotect(input);
    }

    //Method 2 One Way-----------------------------------------------------------------------
    public string HashCreate(string value, string salt)
    {
        var valueBytes = Microsoft.AspNetCore.Cryptography.KeyDerivation.KeyDerivation.Pbkdf2(
                                 password: value,
                                 salt: System.Text.Encoding.UTF8.GetBytes(salt),
                                 prf: Microsoft.AspNetCore.Cryptography.KeyDerivation.KeyDerivationPrf.HMACSHA512,
                                 iterationCount: 10000,
                                 numBytesRequested: 256 / 8);

        //return System.Convert.ToBase64String(valueBytes);
        return System.Convert.ToBase64String(valueBytes) + "æ" + salt;
    }

    public bool ValidateHash(string value, string salt, string hash)
           //=> HashCreate(value, salt) == hash;
           => HashCreate(value, salt).Split('æ')[0] == hash;

    public string HashCreate()
    {
        byte[] randomBytes = new byte[128 / 8];
        using (var generator = System.Security.Cryptography.RandomNumberGenerator.Create())
        {
            generator.GetBytes(randomBytes);
            return System.Convert.ToBase64String(randomBytes);
        }
    }
}