public void GenerateOtp_test_with_Google_Authenticator_1()
{
var keyData = new byte[] // Base-32: 32W3532IMVWGY3ZB
{
0xDE, 0xAD, 0xBE, 0xEF, 0x48,
0x65, 0x6C, 0x6C, 0x6F, 0x21
};
var key = new Key(keyData);
this.TestSHA1AndAssert(key, 6, 1, "092093");
this.TestSHA1AndAssert(key, 6, 11, "266262");
}
public void GenerateOtp_returns_SHA1_reference_values_with_bytearray_key()
{
var keyData = new byte[]
{
0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30,
0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30
};
var key = new Key(keyData);
this.TestSHA1AndAssert(key, 6, 0, "755224");
this.TestSHA1AndAssert(key, 6, 1, "287082");
this.TestSHA1AndAssert(key, 6, 2, "359152");
this.TestSHA1AndAssert(key, 6, 3, "969429");
this.TestSHA1AndAssert(key, 6, 4, "338314");
this.TestSHA1AndAssert(key, 6, 5, "254676");
this.TestSHA1AndAssert(key, 6, 6, "287922");
this.TestSHA1AndAssert(key, 6, 7, "162583");
this.TestSHA1AndAssert(key, 6, 8, "399871");
this.TestSHA1AndAssert(key, 6, 9, "520489");
}
public void GenerateOtp_without_hmac_returns_SHA1_with_bytearray_key()
{
var keyData = new byte[]
{
0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30,
0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30
};
var key = new Key(keyData);
this.TestSHA1AndAssert(key, 6, 0, this.GetOtpWithImplicitHMAC(key, 6, 0));
this.TestSHA1AndAssert(key, 6, 1, this.GetOtpWithImplicitHMAC(key, 6, 1));
this.TestSHA1AndAssert(key, 6, 2, this.GetOtpWithImplicitHMAC(key, 6, 2));
this.TestSHA1AndAssert(key, 6, 3, this.GetOtpWithImplicitHMAC(key, 6, 3));
this.TestSHA1AndAssert(key, 6, 4, this.GetOtpWithImplicitHMAC(key, 6, 4));
this.TestSHA1AndAssert(key, 6, 5, this.GetOtpWithImplicitHMAC(key, 6, 5));
this.TestSHA1AndAssert(key, 6, 6, this.GetOtpWithImplicitHMAC(key, 6, 6));
this.TestSHA1AndAssert(key, 6, 7, this.GetOtpWithImplicitHMAC(key, 6, 7));
this.TestSHA1AndAssert(key, 6, 8, this.GetOtpWithImplicitHMAC(key, 6, 8));
this.TestSHA1AndAssert(key, 6, 9, this.GetOtpWithImplicitHMAC(key, 6, 9));
}
private void TestSHA1AndAssert(Key key, int digits, int counter, string expected)
{
var otp = new CounterBasedOtpGenerator(key, digits, new SHA1HMACAlgorithm());
var result = otp.GenerateOtp(counter);
Assert.AreEqual(expected, result);
}
private string GetOtpWithImplicitHMAC(Key key, int digits, int counter)
{
var otp = new CounterBasedOtpGenerator(key, digits);
return otp.GenerateOtp(counter);
}
private void TestSHA512AndAssert(Key key, int digits, DateTime time, string expected)
{
var otp = new TimeBasedOtpGenerator(key, digits, new SHA512HMACAlgorithm());
var result = otp.GenerateOtp(time);
Assert.AreEqual(expected, result);
}
private string GetOtpWithImplicitHMAC(Key key, int digits, DateTime time)
{
var otp = new TimeBasedOtpGenerator(key, digits);
return otp.GenerateOtp(time);
}
public void GenerateOtp_test_with_Google_Authenticator_2()
{
var keyData = new byte[] // Base-32: 32W3532IMVWGY3ZB
{
0xDE, 0xAD, 0xBE, 0xEF, 0x48,
0x65, 0x6C, 0x6C, 0x6F, 0x21
};
var key = new Key(keyData);
this.TestSHA1AndAssert(key, 6, new DateTime(2011, 10, 17, 7, 52, 0, DateTimeKind.Utc), "139594");
}
public void GenerateOtp_test_with_Google_Authenticator_1()
{
var keyData = new byte[] // Base-32: JBSWY3DPEHPK3PXP
{
0x48, 0x65, 0x6C, 0x6C, 0x6F,
0x21, 0xDE, 0xAD, 0xBE, 0xEF
};
var key = new Key(keyData);
this.TestSHA1AndAssert(key, 6, new DateTime(2011, 10, 17, 7, 49, 45, DateTimeKind.Utc), "010374");
}
/// <summary>
/// Initializes a new instance of the TimeBasedOtpGenerator class. This
/// is used when the client and server do not share a counter
/// value but the clocks between the two are synchronized within
/// reasonable margins of each other.
/// </summary>
/// <param name="secretKey">The secret key.</param>
/// <param name="otpLength">The number of digits in the OTP to generate.</param>
public TimeBasedOtpGenerator(Key secretKey, int otpLength)
: this(secretKey, otpLength, new SHA1HMACAlgorithm())
{
}
/// <summary>
/// Initializes a new instance of the TimeBasedOtpGenerator class. This
/// is used when the client and server do not share a counter
/// value but the clocks between the two are synchronized within
/// reasonable margins of each other.
/// </summary>
/// <param name="secretKey">The secret key.</param>
/// <param name="otpLength">The number of digits in the OTP to generate.</param>
/// <param name="hmacAlgorithm">The HMAC algorithm to use.</param>
public TimeBasedOtpGenerator(Key secretKey, int otpLength, IHMACAlgorithm hmacAlgorithm)
{
this.counterOtp = new CounterBasedOtpGenerator(secretKey, otpLength, hmacAlgorithm);
}
/// <summary>
/// Initializes a new instance of the CounterBasedOtpGenerator class.
/// This is used when the client and server share a counter value.
/// </summary>
/// <param name="secretKey">The secret key.</param>
/// <param name="otpLength">The number of digits in the OTP to generate.</param>
/// <param name="hmacAlgorithm">The hashing algorithm to use.</param>
public CounterBasedOtpGenerator(Key secretKey, int otpLength, IHMACAlgorithm hmacAlgorithm)
{
this.secretKey = secretKey;
this.otpLength = otpLength;
this.hmacAlgorithm = hmacAlgorithm;
}
