public static byte[] Encrypt(byte[] data, byte[] key)
{
uint[] key1 = AlgoTea.CreateKey(key);
uint[] v = new uint[2];
byte[] buffer = new byte[AlgoTea.NextMultipleOf8(data.Length + 4)];
byte[] bytes = BitConverter.GetBytes(data.Length);
Array.Copy((Array)bytes, (Array)buffer, bytes.Length);
Array.Copy((Array)data, 0, (Array)buffer, bytes.Length, data.Length);
using (MemoryStream memoryStream = new MemoryStream(buffer))
{
using (BinaryWriter binaryWriter = new BinaryWriter((Stream)memoryStream))
{
for (int startIndex = 0; startIndex < buffer.Length; startIndex += 8)
{
v[0] = BitConverter.ToUInt32(buffer, startIndex);
v[1] = BitConverter.ToUInt32(buffer, startIndex + 4);
AlgoTea.BlockEncrypt(v, key1);
binaryWriter.Write(v[0]);
binaryWriter.Write(v[1]);
}
}
}
return(buffer);
}
public static byte[] Decrypt(byte[] data1, byte[] key)
{
byte[] data = AlgoTea.Encrypt(data1, key);
if (data.Length % 8 != 0)
{
throw new ArgumentException("Длина зашифрованных данных должна быть кратна 8 байтам");
}
uint[] key1 = AlgoTea.CreateKey(key);
uint[] v = new uint[2];
byte[] buffer = new byte[data.Length];
Array.Copy((Array)data, (Array)buffer, data.Length);
using (MemoryStream memoryStream = new MemoryStream(buffer))
{
using (BinaryWriter binaryWriter = new BinaryWriter((Stream)memoryStream))
{
for (int startIndex = 0; startIndex < buffer.Length; startIndex += 8)
{
v[0] = BitConverter.ToUInt32(buffer, startIndex);
v[1] = BitConverter.ToUInt32(buffer, startIndex + 4);
AlgoTea.BlockDecrypt(v, key1);
binaryWriter.Write(v[0]);
binaryWriter.Write(v[1]);
}
}
}
uint uint32 = BitConverter.ToUInt32(buffer, 0);
if ((long)uint32 > (long)(buffer.Length - 4))
{
throw new ArgumentException("Зашифрованные данные разрушены");
}
byte[] numArray = new byte[(int)uint32];
Array.Copy((Array)buffer, 4L, (Array)numArray, 0L, (long)uint32);
return(numArray);
}
private void btnDecode_Click(object sender, EventArgs e)
{
try
{
this.tbDecoded.Text = AlgoTea.Decrypt(this.tbSource.Text, this.tbPassword.Text);
}
catch (Exception ex)
{
int num = (int)MessageBox.Show((IWin32Window)this, ex.Message, "Декодирование", MessageBoxButtons.OK, MessageBoxIcon.Hand);
}
}
public static string Encrypt(string data, string key) => Encoding.Default.GetString(AlgoTea.Encrypt(Encoding.Default.GetBytes(data), Encoding.Default.GetBytes(key)));
