using NUnit.Framework;
using System;
using System.Text;

#if KeePassLib
using KeePassLib.Cryptography;
#else
using KeePass2PCL.Cryptography;
#endif

namespace KeePass2PCL.Test.Shared.Cryptography
{
  [TestFixture ()]
  public class HmacOtpTests
  {
    // Using the test case from Appendix D of RFC 4226

    const string secret = "12345678901234567890";
    static readonly string[] expectedHOTP = new string[] {
      "755224", "287082", "359152", "969429", "338314",
      "254676", "287922", "162583", "399871", "520489"
    };

    [Test ()]
    public void TestGenerate ()
    {
      var secretBytes = Encoding.UTF8.GetBytes (secret);

      for (ulong i = 0; i < 10; i++) {
        var hotp = HmacOtp.Generate (secretBytes, i, 6, false, -1);
        Assert.That (hotp, Is.EqualTo (expectedHOTP[i]));
      }
    }
  }
}