static TransformTables()
{
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("01000000"), 4, 1));
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("02000000"), 4, 1));
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("04000000"), 4, 1));
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("08000000"), 4, 1));
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("10000000"), 4, 1));
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("20000000"), 4, 1));
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("40000000"), 4, 1));
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("80000000"), 4, 1));
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("1b000000"), 4, 1));
TransformTables.Rcon.Add(new Matrix(BaseTransform.FromHexToBinary("36000000"), 4, 1));
}
public override string EncryptionStart(string PlainText, string CipherKey, bool IsTextBinary)
{
// Encryption Process
StringBuilder binaryText = null;
if (IsTextBinary == false)
{
PlainText = BaseTransform.FromTextToBinary(PlainText);
}
else
{
//binaryText = PlainText;
}
binaryText = new StringBuilder(BaseTransform.setTextMultipleOf128Bits(PlainText));
StringBuilder EncryptedTextBuilder = new StringBuilder(binaryText.Length);
// Make All-round keys
Matrix Matrix_CipherKey = new Matrix(BaseTransform.FromHexToBinary(CipherKey));
Keys key = new Keys();
key.setCipherKey(Matrix_CipherKey);
key = this.KeyExpansion(key, false);
// Initialize Progress Bar
OnInitProgress(new ProgressInitArgs(binaryText.Length));
//Matrix state = new Matrix(4, 4);
for (int j = 0; j < (binaryText.Length / 128); j++)
{
//state.setState(binaryText.ToString().Substring(j * 128, 128));
Matrix state = new Matrix(binaryText.ToString().Substring(j * 128, 128));
state = this.AddRoundKey(state, key, 0);
for (int i = 1; i < 11; i++)
{
if (i == 10)
{
state = this.SubBytes(state, false);
state = this.ShiftRows(state, false);
state = this.AddRoundKey(state, key, i);
}
else
{
state = this.SubBytes(state, false);
state = this.ShiftRows(state, false);
state = this.MixColumns(state, false);
state = this.AddRoundKey(state, key, i);
}
}
EncryptedTextBuilder.Append(state.ToString());
// Increase Progress Bar
OnIncrementProgress(new ProgressEventArgs(state.ToString().Length));
}
return(EncryptedTextBuilder.ToString());
}
public string this[int i, int j]
{
get
{
return(matrix[i, j]);
}
set
{
//If it gets hexa decimal transform to binary
if (value.Length == 2)
{
matrix[i, j] = BaseTransform.FromHexToBinary(value);
}
else if (value.Length == 8)
{
matrix[i, j] = value;
}
}
}
public override string DecryptionStart(string PlainText, string CipherKey, bool IsTextBinary)
{
// Decryption Process
string binaryText = "";
if (IsTextBinary == false)
{
binaryText = BaseTransform.FromTextToBinary(PlainText);
}
else
{
binaryText = PlainText;
}
StringBuilder DecryptedTextBuilder = new StringBuilder(binaryText.Length);
// Make All-round keys
Matrix Matrix_CipherKey = new Matrix(BaseTransform.FromHexToBinary(CipherKey));
Keys key = new Keys();
key.setCipherKey(Matrix_CipherKey);
key = this.KeyExpansion(key, false);
// Initialize Progress Bar
OnInitProgress(new ProgressInitArgs(binaryText.Length));
//Matrix state = new Matrix(4, 4);
for (int j = 0; j < (binaryText.Length / 128); j++)
{
//state.setState(binaryText.Substring(j * 128, 128));
Matrix state = new Matrix(binaryText.Substring(j * 128, 128));
state = this.AddRoundKey(state, key, 10);
for (int i = 9; i >= 0; i--)
{
if (i == 0)
{
state = this.ShiftRows(state, true);
state = this.SubBytes(state, true);
state = this.AddRoundKey(state, key, i);
}
else
{
state = this.ShiftRows(state, true);
state = this.SubBytes(state, true);
state = this.AddRoundKey(state, key, i);
state = this.MixColumns(state, true);
//DecryptedTextBuilder.Append(state.ToString());
}
}
// It's for correct subtracted '0' that have added for set text multiple of 128bit
if ((j * 128 + 128) == binaryText.Length)
{
StringBuilder last_text = new StringBuilder(state.ToString().TrimEnd('0'));
int count = state.ToString().Length - last_text.Length;
if ((count % 8) != 0)
{
count = 8 - (count % 8);
}
string append_text = "";
for (int k = 0; k < count; k++)
{
append_text += "0";
}
DecryptedTextBuilder.Append(last_text.ToString() + append_text);
}
else
{
DecryptedTextBuilder.Append(state.ToString());
}
// Increase Progress Bar
OnIncrementProgress(new ProgressEventArgs(state.ToString().Length));
}
//return DecryptedTextBuilder.ToString().TrimEnd('0');
return(DecryptedTextBuilder.ToString());
}
