private uint[][] GenerateWorkingKey(byte[] key, bool forEncryption)
{
int num = key.Length / 4;
if (num != 4 && num != 6 && num != 8)
{
throw new ArgumentException("Key length not 128/192/256 bits.");
}
this.ROUNDS = num + 6;
uint[][] array = new uint[this.ROUNDS + 1][];
for (int i = 0; i <= this.ROUNDS; i++)
{
array[i] = new uint[4];
}
int num2 = 0;
int j = 0;
while (j < key.Length)
{
array[num2 >> 2][num2 & 3] = Pack.LE_To_UInt32(key, j);
j += 4;
num2++;
}
int num3 = this.ROUNDS + 1 << 2;
for (int k = num; k < num3; k++)
{
uint num4 = array[k - 1 >> 2][k - 1 & 3];
if (k % num == 0)
{
num4 = (AesLightEngine.SubWord(AesLightEngine.Shift(num4, 8)) ^ (uint)AesLightEngine.rcon[k / num - 1]);
}
else if (num > 6 && k % num == 4)
{
num4 = AesLightEngine.SubWord(num4);
}
array[k >> 2][k & 3] = (array[k - num >> 2][k - num & 3] ^ num4);
}
if (!forEncryption)
{
for (int l = 1; l < this.ROUNDS; l++)
{
uint[] array2 = array[l];
for (int m = 0; m < 4; m++)
{
array2[m] = AesLightEngine.Inv_Mcol(array2[m]);
}
}
}
return(array);
}
private void DecryptBlock(uint[][] KW)
{
uint[] array = KW[this.ROUNDS];
uint num = this.C0 ^ array[0];
uint num2 = this.C1 ^ array[1];
uint num3 = this.C2 ^ array[2];
uint num4 = this.C3 ^ array[3];
int i = this.ROUNDS - 1;
uint num5;
uint num6;
uint num7;
while (i > 1)
{
array = KW[i--];
num5 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 24 & 255u))] << 24)) ^ array[0]);
num6 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num2 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 24 & 255u))] << 24)) ^ array[1]);
num7 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num3 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 24 & 255u))] << 24)) ^ array[2]);
num4 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num4 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 24 & 255u))] << 24)) ^ array[3]);
array = KW[i--];
num = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num5 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 24 & 255u))] << 24)) ^ array[0]);
num2 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num6 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 24 & 255u))] << 24)) ^ array[1]);
num3 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num7 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 24 & 255u))] << 24)) ^ array[2]);
num4 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num4 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 24 & 255u))] << 24)) ^ array[3]);
}
array = KW[1];
num5 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 24 & 255u))] << 24)) ^ array[0]);
num6 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num2 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 24 & 255u))] << 24)) ^ array[1]);
num7 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num3 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 24 & 255u))] << 24)) ^ array[2]);
num4 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num4 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 24 & 255u))] << 24)) ^ array[3]);
array = KW[0];
this.C0 = (uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num5 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 24 & 255u))] << 24 ^ (int)array[0]);
this.C1 = (uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num6 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 24 & 255u))] << 24 ^ (int)array[1]);
this.C2 = (uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num7 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 24 & 255u))] << 24 ^ (int)array[2]);
this.C3 = (uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num4 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 24 & 255u))] << 24 ^ (int)array[3]);
}
