public static string Encrypt(string clearText, string key)
{
char[][] firstTable = new char[(int)Math.Ceiling((float)clearText.Length / key.Length + 1)][];
for (int i = 0; i < firstTable.Length; i++)
{
firstTable[i] = new char[key.Length];
}
for (int j = 0; j < firstTable[0].Length; j++)
{
firstTable[0][j] = key[j];
}
for (int i = 1; i < firstTable.Length; i++)
{
for (int j = 0; j < firstTable[i].Length; j++)
{
int tempId = (i - 1) * firstTable[i].Length + j;
if (tempId < clearText.Length)
{
firstTable[i][j] = clearText[tempId];
}
else
{
firstTable[i][j] = ' ';
}
}
}
char[][] secondTable = new char[firstTable.Length][];
int[] shuffle = LetterMap(key);
for (int i = 0; i < firstTable.Length; i++)
{
secondTable[i] = new char[firstTable[i].Length];
for (int j = 0; j < firstTable[i].Length; j++)
{
secondTable[i][shuffle[j]] = firstTable[i][j];
}
}
for (int i = 1; i < secondTable.Length; i++)
{
for (int j = 0; j < secondTable[i].Length; j++)
{
if (secondTable[i][j] != ' ')
{
secondTable[i][j] = Vigenere.Encrypt(secondTable[i][j], secondTable[0][j]);
}
}
}
string result = "";
for (int multipleOfFive = 0;
multipleOfFive < (int)Math.Ceiling((float)secondTable.Length / 5);
multipleOfFive++)
{
for (int j = 0; j < secondTable[0].Length; j++)
{
for (int i = 0; i < 5; i++)
{
int x = i + multipleOfFive * 5 + 1;
if (x < secondTable.Length &&
secondTable[x][j] != ' ')
{
result += secondTable[x][j];
}
}
}
}
return(result);
}
