private void Entropy(object sender, RoutedEventArgs e)
{
if (RichText.GetText(RichTextOrig) != String.Empty)
{
int[] alphabetCount = new int[alphabet.Length];
int n = 0;
double[] alphabetChance = new double[alphabet.Length];
double entropy = 0.0D;
string text = RichText.GetText(RichTextOrig).Substring(0, RichText.GetText(RichTextOrig).Length - 2).ToLower();
string replStr = " ,.!?:-;()[]'\"";
for (int i = 0; i < replStr.Length; i++)
{
text = text.Replace(replStr[i].ToString(), "");
}
for (int i = 0; i < text.Length; i++)
{
for (int j = 0; j < alphabet.Length; j++)
{
if (text[i] == alphabet[j])
{
alphabetCount[j]++;
n++;
}
}
}
for (int i = 0; i < alphabetChance.Length; i++)
{
alphabetChance[i] = (double)alphabetCount[i] / n;
}
for (int i = 0; i < alphabetChance.Length; i++)
{
if (alphabetChance[i] != 0)
{
entropy += alphabetChance[i] * Math.Log(alphabetChance[i], 2);
}
}
TextEntropy.Text = (entropy * (-1)).ToString();
Histogram histo = new Histogram(alphabetChance);
histo.Show();
}
else
{
MessageBox.Show("Поле пустое. Заполните его");
}
}
private void Entropy(object sender, RoutedEventArgs e)
{
string text = RichText.GetText(OriginalText).Substring(0, RichText.GetText(OriginalText).Length - 2).ToLower();
if (!checkText(text))
{
MessageBox.Show("Введите символ алфавита, не пустую строку :)");
return;
}
int[] alphCount = new int[alph.Length];
int n = 0;
double[] alphChance = new double[alph.Length];
double entropy = 0.0D;
string rplChars = " ,.!?:-;()[]'\"";
foreach (var chr in rplChars)
{
text = text.Replace(chr.ToString(), "");
}
if (!checkText(text))
{
MessageBox.Show("Введите символ алфавита, не пустую строку :)");
return;
}
for (int i = 0; i < text.Length; i++)
{
for (int j = 0; j < alph.Length; j++)
{
if (text[i] == alph[j])
{
alphCount[j]++;
n++;
}
}
}
for (int i = 0; i < alphChance.Length; i++)
{
alphChance[i] = (double)alphCount[i] / n;
}
for (int i = 0; i < alphChance.Length; i++)
{
if (alphChance[i] != 0)
{
entropy += alphChance[i] * Math.Log(alphChance[i], 2);
}
}
TextEntropy.Text = (entropy * (-1)).ToString();
Histogram histo = new Histogram(alphChance);
histo.Show();
}
private void Encrypt(object sender, RoutedEventArgs e)
{
RichTextEnc.Document.Blocks.Clear();
if (RichText.GetText(RichTextOrig) != String.Empty && TextA.Text != String.Empty)
{
char a = TextA.Text.ToLower()[0];
string text = RichText.GetText(RichTextOrig).ToLower().Substring(0, RichText.GetText(RichTextOrig).Length - 2);
string[] words = text.Split(' ');
string encText = "";
//Histogram
int[] alphabetCount = new int[alphabet.Length];
int number = 0;
double[] alphabetChance = new double[alphabet.Length];
//
foreach (string word in words)
{
string temp = word;
if (temp.Length % 2 == 1)
{
temp += a;
}
for (int i = 0; i < temp.Length; i = i + 2)
{
encText += (LetterNumber(temp[i]) * alphabet.Length + LetterNumber(temp[i + 1])).ToString().PadLeft(4, '0');
}
encText += " ";
}
RichText.SetText(RichTextEnc, encText);
//Histogram
string replStr = " ,.!?:-;()[]'\"";
for (int i = 0; i < replStr.Length; i++)
{
text = text.Replace(replStr[i].ToString(), "");
}
for (int i = 0; i < text.Length; i++)
{
for (int j = 0; j < alphabet.Length; j++)
{
if (text[i] == alphabet[j])
{
alphabetCount[j]++;
number++;
}
}
}
for (int i = 0; i < alphabetChance.Length; i++)
{
alphabetChance[i] = (double)alphabetCount[i] / number;
}
Histogram histo = new Histogram(alphabetChance);
histo.Show();
}
else
{
MessageBox.Show("Поле пустое. Заполните его");
}
}
private void Encrypt(object sender, RoutedEventArgs e)
{
RichTextEnc.Document.Blocks.Clear();
if (RichText.GetText(RichTextOrig) != String.Empty && TextA.Text != String.Empty && TextB.Text != String.Empty)
{
int n = alphabet.Length;
int a = Int32.Parse(TextA.Text);
int b = Int32.Parse(TextB.Text);
//Histogram
int[] alphabetCount = new int[alphabet.Length];
int number = 0;
double[] alphabetChance = new double[alphabet.Length];
//
if (a >= 0 && a < n && b >= 0 && b < n && IsSimple(a) && IsSimple(b) && (n % a != 0))
{
string text = RichText.GetText(RichTextOrig).ToLower();
text = text.Substring(0, text.Length - 2);
string encText = "";
for (int i = 0; i < text.Length; i++)
{
if (alphabet.Contains(text[i]))
{
encText += alphabet[((a * LetterNumber(text[i])) + b) % n];
}
else
{
encText += text[i];
}
}
RichText.SetText(RichTextEnc, encText);
//Histogram
string replStr = " ,.!?:-;()[]'\"";
for (int i = 0; i < replStr.Length; i++)
{
text = text.Replace(replStr[i].ToString(), "");
}
for (int i = 0; i < text.Length; i++)
{
for (int j = 0; j < alphabet.Length; j++)
{
if (text[i] == alphabet[j])
{
alphabetCount[j]++;
number++;
}
}
}
for (int i = 0; i < alphabetChance.Length; i++)
{
alphabetChance[i] = (double)alphabetCount[i] / number;
}
Histogram histo = new Histogram(alphabetChance);
histo.Show();
}
else
{
MessageBox.Show("Введенные коэффициенты ошибочны. Исправьте это");
}
}
else
{
MessageBox.Show("Поле пустое. Заполните его");
}
}
private void Decrypt(object sender, RoutedEventArgs e)
{
RichTextOrig.Document.Blocks.Clear();
if (RichText.GetText(RichTextEnc) != String.Empty)
{
string encText = RichText.GetText(RichTextEnc).ToLower().Substring(0, RichText.GetText(RichTextEnc).Length - 2);
string[] words = encText.Split(' ');
string text = "";
//Histogram
string digitAlphabet = "0123456789";
int[] digitAlphabetCount = new int[digitAlphabet.Length];
int number = 0;
double[] digitAlphabetChance = new double[digitAlphabet.Length];
//
foreach (string word in words)
{
string temp = word;
for (int i = 0; i < temp.Length; i = i + 4)
{
int chain = Int32.Parse(temp.Substring(i, 4));
int row = chain / alphabet.Length;
int column = chain % alphabet.Length;
text += alphabet[row].ToString() + alphabet[column].ToString();
}
text += " ";
}
RichText.SetText(RichTextOrig, text);
string replStr = " ,.!?:-;()[]'\"";
for (int i = 0; i < replStr.Length; i++)
{
encText = encText.Replace(replStr[i].ToString(), "");
}
for (int i = 0; i < encText.Length; i++)
{
for (int j = 0; j < digitAlphabet.Length; j++)
{
if (encText[i] == digitAlphabet[j])
{
digitAlphabetCount[j]++;
number++;
}
}
}
for (int i = 0; i < digitAlphabetChance.Length; i++)
{
digitAlphabetChance[i] = (double)digitAlphabetCount[i] / number;
}
Histogram histo = new Histogram(digitAlphabetChance);
histo.Show();
}
else
{
MessageBox.Show("Поле пустое. Заполните его");
}
}
