public void EncryptNoKeyTest()
{
ShiftCipher myCipher = new ShiftCipher();
TestCtor(myCipher);
myCipher.Encrypt(TEST_STR);
}
public void EncryptFileTest()
{
ShiftCipher shiftCipher = new ShiftCipher();
shiftCipher.GenKey();
shiftCipher.Encrypt(BASE_FILE, ENC_FILE);
TestFileEnc();
}
public void EncryptStrTest()
{
ShiftCipher myCipher = new ShiftCipher();
TestCtor(myCipher);
myCipher.GenKey();
TestStrEnc(myCipher, myCipher.Encrypt(TEST_STR));
}
public void Caesar()
{
ShiftCipher cipher = new ShiftCipher();
const string plaintext = "The quick brown fox jumps over the lazy dog.";
const string ciphertext = "Wkh txlfn eurzq ira mxpsv ryhu wkh odcb grj.";
Assert.AreEqual(ciphertext, cipher.Encrypt(plaintext, WellKnownShiftCipherKeys.Caesar));
Assert.AreEqual(plaintext, cipher.Decrypt(ciphertext, WellKnownShiftCipherKeys.Caesar));
}
public void Rot13()
{
ShiftCipher cipher = new ShiftCipher();
const string plaintext = "Why did the chicken cross the road?";
const string ciphertext = "Jul qvq gur puvpxra pebff gur ebnq?";
Assert.AreEqual(ciphertext, cipher.Encrypt(plaintext, WellKnownShiftCipherKeys.Rot13));
Assert.AreEqual(plaintext, cipher.Decrypt(ciphertext, WellKnownShiftCipherKeys.Rot13));
}
public void DecryptStrTest()
{
ShiftCipher myCipher = new ShiftCipher();
TestCtor(myCipher);
myCipher.GenKey();
string encStr = myCipher.Encrypt(TEST_STR);
TestStrEnc(myCipher, encStr);
TestStrDec(encStr, myCipher.Decrypt(encStr));
}
public void ROT_13_TEST()
{
ShiftCipher myCipher = new ShiftCipher(ShiftCipher.MODE.ROT13);
Assert.AreEqual(ShiftCipher.MODE.ROT13, myCipher.GetMode(), "default shift mode not set correctly");
Assert.AreEqual(0, myCipher.GetKey(), "Incorrect defualt shift amount found");
myCipher.GenKey();
Assert.AreEqual(ROT_13_SHIFT, myCipher.GetKey(), "Incorrect shift amount found");
string encStr = myCipher.Encrypt(TEST_STR);
TestStrEnc(myCipher, encStr);
TestStrDec(encStr, myCipher.Decrypt(encStr));
}
public ActionResult Index(string inputString, string encrypt)
{
if (encrypt == "encrypt")
{
var shiftAmount = 3;
ShiftCipher shifter = new ShiftCipher();
var outputString = shifter.Encrypt(inputString, shiftAmount);
ViewBag.outputString = outputString;
return View();
}
else
{
var shiftAmount = -3;
ShiftCipher shifter = new ShiftCipher();
var outputString = shifter.Decrypt(inputString, shiftAmount);
ViewBag.outputString = outputString;
return View();
}
}
/// <summary>
/// Computes every possible transformations of the input text.
/// </summary>
/// <param name="text">The input text to transform.</param>
/// <param name="charset">Charset of the input text.</param>
/// <returns></returns>
public static IReadOnlyDictionary <int, string> Analyze(string text, string charset = Charsets.English)
{
if (text == null)
{
throw new ArgumentNullException(nameof(text));
}
if (charset == null)
{
throw new ArgumentNullException(nameof(charset));
}
var cipher = new ShiftCipher(charset);
return(Enumerable.Range(0, charset.Length)
.ToDictionary(k => k, k => cipher.Encrypt(text, k))
);
}