private static void BlockMix(uint[] B, uint[] X1, uint[] X2, uint[] Y, int r)
{
Array.Copy(B, B.Length - 16, X1, 0, 16);
int BOff = 0, YOff = 0, halfLen = B.Length >> 1;
for (int i = 2 * r; i > 0; --i)
{
Xor(X1, B, BOff, X2);
Salsa20Engine.SalsaCore(8, X2, X1);
Array.Copy(X1, 0, Y, YOff, 16);
YOff = halfLen + BOff - YOff;
BOff += 16;
}
}
private static void BlockMix(uint[] B, uint[] X1, uint[] X2, uint[] Y, int r)
{
global::System.Array.Copy((global::System.Array)B, B.Length - 16, (global::System.Array)X1, 0, 16);
int num = 0;
int num2 = 0;
int num3 = B.Length >> 1;
for (int num4 = 2 * r; num4 > 0; num4--)
{
Xor(X1, B, num, X2);
Salsa20Engine.SalsaCore(8, X2, X1);
global::System.Array.Copy((global::System.Array)X1, 0, (global::System.Array)Y, num2, 16);
num2 = num3 + num - num2;
num += 16;
}
global::System.Array.Copy((global::System.Array)Y, 0, (global::System.Array)B, 0, Y.Length);
}
private static void BlockMix(uint[] B, uint[] X1, uint[] X2, uint[] Y, int r)
{
Array.Copy(B, B.Length - 16, X1, 0, 16);
int num = 0;
int num2 = 0;
int num3 = B.Length >> 1;
for (int i = 2 * r; i > 0; i--)
{
SCrypt.Xor(X1, B, num, X2);
Salsa20Engine.SalsaCore(8, X2, X1);
Array.Copy(X1, 0, Y, num2, 16);
num2 = num3 + num - num2;
num += 16;
}
Array.Copy(Y, 0, B, 0, Y.Length);
}
protected override void SetKey(byte[] keyBytes, byte[] ivBytes)
{
if (keyBytes.Length != 32)
{
throw new ArgumentException(AlgorithmName + " requires a 256 bit key");
}
base.SetKey(keyBytes, ivBytes);
engineState[8] = Pack.LE_To_UInt32(ivBytes, 8);
engineState[9] = Pack.LE_To_UInt32(ivBytes, 12);
uint[] array = new uint[engineState.Length];
Salsa20Engine.SalsaCore(20, engineState, array);
engineState[1] = array[0] - engineState[0];
engineState[2] = array[5] - engineState[5];
engineState[3] = array[10] - engineState[10];
engineState[4] = array[15] - engineState[15];
engineState[11] = array[6] - engineState[6];
engineState[12] = array[7] - engineState[7];
engineState[13] = array[8] - engineState[8];
engineState[14] = array[9] - engineState[9];
engineState[6] = Pack.LE_To_UInt32(ivBytes, 16);
engineState[7] = Pack.LE_To_UInt32(ivBytes, 20);
ResetCounter();
}