private static void code(byte[] In, int inOffset, int inPos, byte[] Out, int outOffset, int outPos, byte[] key)
{
if (outPos > 0)
{
for (int i = 0; i < 8; i++)
{
In[outOffset + outPos + i] = System.BitConverter.GetBytes(In[inOffset + inPos + i] ^ Out[outOffset + outPos + i - 8])[0];
}
}
uint[] array = QQTea.FormatKey(key);
uint num = QQTea.ConvertByteArrayToUInt(In, outOffset + outPos);
uint num2 = QQTea.ConvertByteArrayToUInt(In, outOffset + outPos + 4);
uint num3 = 0u;
uint num4 = 2654435769u;
uint num5 = 16u;
while (num5-- > 0u)
{
num3 += num4;
num += ((num2 << 4) + array[0] ^ num2 + num3 ^ (num2 >> 5) + array[1]);
num2 += ((num << 4) + array[2] ^ num + num3 ^ (num >> 5) + array[3]);
}
Array.Copy(QQTea.ConvertUIntToByteArray(num), 0, Out, outOffset + outPos, 4);
Array.Copy(QQTea.ConvertUIntToByteArray(num2), 0, Out, outOffset + outPos + 4, 4);
if (inPos > 0)
{
for (int j = 0; j < 8; j++)
{
Out[outOffset + outPos + j] = System.BitConverter.GetBytes(Out[outOffset + outPos + j] ^ In[inOffset + inPos + j - 8])[0];
}
}
}
private static uint[] FormatKey(byte[] key)
{
if (key.Length == 0)
{
throw new ArgumentException("Key must be between 1 and 16 characters in length");
}
byte[] array = new byte[16];
if (key.Length < 16)
{
Array.Copy(key, 0, array, 0, key.Length);
for (int i = key.Length; i < 16; i++)
{
array[i] = 32;
}
}
else
{
Array.Copy(key, 0, array, 0, 16);
}
uint[] array2 = new uint[4];
int num = 0;
for (int j = 0; j < array.Length; j += 4)
{
array2[num++] = QQTea.ConvertByteArrayToUInt(array, j);
}
return(array2);
}