public void DecodeTest()
{
SubstitutionCypher sc = new SubstitutionCypher("hgllo", alphabet);
SpecialVariableBaseNumber seed = new SpecialVariableBaseNumber(new List <int> {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0
});
Assert.AreEqual("hello", sc.Decode(seed));
}
public void WhenIEncryptTheTextUsingTheFollowingLetterSubstitution(Table table)
{
var cypher = new SubstitutionCypher();
foreach (var tableRow in table.Rows)
{
cypher.Substitute(tableRow[0][0]).For(tableRow[1][0]);
}
_encryptedText = cypher.Encrypt(_plainText);
}
public void WhenIEncryptTheTextUsingTheFollowingLetterSubstitution(Table table)
{
var cypher = new SubstitutionCypher();
foreach (var tableRow in table.Rows)
{
cypher.Substitute(tableRow[0][0]).For(tableRow[1][0]);
}
_encryptedText = cypher.Encrypt(_plainText);
}
private void Hack()
{
string text = textBoxEncryptedText.Text;
hacker.Alphabet = alphabet;
hacker.Analyze(text);
var table1 = new Dictionary <char, double>();
var table2 = new Dictionary <char, double>();
switch (alphabet)
{
case Alphabet.Latin:
table1 = analyzer.LatinTable;
table2 = hacker.LatinTable;
break;
case Alphabet.Ukrainian:
table1 = analyzer.UkrainianTable;
table2 = hacker.UkrainianTable;
break;
}
var query = from x in table1
orderby x.Value descending
select x.Key;
var query2 = from x in table2
orderby x.Value descending
select x.Key;
var substitutions = new Dictionary <char, char>();
for (int i = 0; i < query.Count(); i++)
{
substitutions.Add(query.ElementAt(i), query2.ElementAt(i));
}
ObservableCollection <SubTable> collection = new ObservableCollection <SubTable>();
foreach (var s in substitutions)
{
collection.Add(new SubTable {
Letter = s.Key, SubLetter = s.Value
});
}
dataGridHackerTable.ItemsSource = collection;
SubstitutionCypher cipher = new SubstitutionCypher {
Alphabet = alphabet
};
textBoxDecryptedText.Text = cipher.Decrypt(text, substitutions);
}
private void SubstitutionCypherDecrypt()
{
SubstitutionCypher cypher = new SubstitutionCypher {
Alphabet = alphabet
};
string C = textBoxEncryptedText.Text;
DoEvents();
Dictionary <char, char> substitutions = new Dictionary <char, char>();
DataGrid dataGrid = gridKey.Children[1] as DataGrid;
for (int i = 0; i < alphabet.GetLength(); ++i)
{
var letter = (dataGrid.GetCell(i, 0).Content as TextBlock).Text[0];
var subletter = (dataGrid.GetCell(i, 1).Content as TextBlock).Text[0];
substitutions.Add(letter, subletter);
}
textBoxDecryptedText.Text = cypher.Decrypt(C, substitutions);
}
public void encodeTest()
{
SubstitutionCypher sc = new SubstitutionCypher("hello", alphabet);
Assert.AreEqual('a', alphabet[0]);
Assert.AreEqual('z', alphabet[25]);
SpecialVariableBaseNumber seed = new SpecialVariableBaseNumber(26);
Assert.AreEqual("hello", sc.Encode(seed));
seed = new SpecialVariableBaseNumber(new List <int> {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0
});
Assert.AreEqual("hfllo", sc.Encode(seed));
seed = new SpecialVariableBaseNumber(new List <int> {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0
});
Assert.AreEqual("hgllo", sc.Encode(seed));
}
public void EncodeDecodePairs()
{
SpecialVariableBaseNumber seed = new SpecialVariableBaseNumber(26);
seed.Inc();
for (int i = 0; i < 100000; ++i)
{
string originalString = "abcdefghijklmnopqrstuvwxyz";
SubstitutionCypher original = new SubstitutionCypher(originalString, alphabet);
if (i == 0)
{
Console.WriteLine($"{original.NumSeeds} possible combinations");
}
string codedString = original.Encode(seed);
Assert.AreNotEqual(originalString, codedString);
SubstitutionCypher coded = new SubstitutionCypher(codedString, alphabet);
Assert.AreEqual(originalString, coded.Decode(seed));
seed.IncBy(732);
}
SubstitutionCypher usesLargeSeed = new SubstitutionCypher("hello", alphabet);
seed = new SpecialVariableBaseNumber(26);
seed.IncBy(usesLargeSeed.NumSeeds - 1);
string borderEncoded = usesLargeSeed.Encode(seed);
Console.WriteLine($"Using seed {seed}");
Console.WriteLine($"Coded: {borderEncoded}");
SubstitutionCypher reverseWithLargeSeed = new SubstitutionCypher(borderEncoded, alphabet);
string decoded = reverseWithLargeSeed.Decode(seed);
Console.WriteLine($"Decoded: {decoded}");
Assert.AreEqual("hello", decoded);
}
private void SubstitutionCypherEncrypt()
{
SubstitutionCypher cipher = new SubstitutionCypher {
Alphabet = alphabet
};
string text = Regex.Replace(textBoxOpenText.Text.ToLower(), "[^" + alphabet.GetStringValue() + "]", "");
string M = Regex.Replace(text, @"\s+", " ");
DoEvents();
Dictionary <char, char> substitutions = new Dictionary <char, char>();
DataGrid dataGrid = gridKey.Children[1] as DataGrid;
for (int i = 0; i < alphabet.GetLength(); ++i)
{
var letter = (dataGrid.GetCell(i, 0).Content as TextBlock).Text[0];
var subletter = (dataGrid.GetCell(i, 1).Content as TextBlock).Text[0];
substitutions.Add(letter, subletter);
}
textBoxEncryptedText.Text = cipher.Encrypt(M, substitutions);
}