private static byte[] MFcrypt(byte[] P, byte[] S, int N, int r, int p, int dkLen)
{
int num = r * 128;
byte[] array = SCrypt.SingleIterationPBKDF2(P, S, p * num);
uint[] array2 = null;
byte[] result;
try
{
int num2 = array.Length >> 2;
array2 = new uint[num2];
Pack.LE_To_UInt32(array, 0, array2);
int num3 = num >> 2;
for (int i = 0; i < num2; i += num3)
{
SCrypt.SMix(array2, i, N, r);
}
Pack.UInt32_To_LE(array2, array, 0);
result = SCrypt.SingleIterationPBKDF2(P, array, dkLen);
}
finally
{
SCrypt.ClearAll(new Array[]
{
array,
array2
});
}
return(result);
}
private static void SMix(uint[] B, int BOff, int N, int r)
{
int num = r * 32;
uint[] array = new uint[16];
uint[] array2 = new uint[16];
uint[] array3 = new uint[num];
uint[] array4 = new uint[num];
uint[][] array5 = new uint[N][];
try
{
Array.Copy(B, BOff, array4, 0, num);
for (int i = 0; i < N; i++)
{
array5[i] = (uint[])array4.Clone();
SCrypt.BlockMix(array4, array, array2, array3, r);
}
uint num2 = (uint)(N - 1);
for (int j = 0; j < N; j++)
{
uint num3 = array4[num - 16] & num2;
SCrypt.Xor(array4, array5[(int)((UIntPtr)num3)], 0, array4);
SCrypt.BlockMix(array4, array, array2, array3, r);
}
Array.Copy(array4, 0, B, BOff, num);
}
finally
{
SCrypt.ClearAll(array5);
SCrypt.ClearAll(new Array[]
{
array4,
array,
array2,
array3
});
}
}