//***********************************************************************
// Populates "this" with the specified amount of random bits
//***********************************************************************
public void GenRandomBits(int bits, StrongNumberProvider rand)
{
int dwords = bits >> 5;
int remBits = bits & 0x1F;
if (remBits != 0)
dwords++;
if (dwords > maxLength)
throw (new ArithmeticException("Number of required bits > maxLength."));
for (int i = 0; i < dwords; i++)
data[i] = (uint)rand.NextUInt32();
for (int i = dwords; i < maxLength; i++)
data[i] = 0;
if (remBits != 0)
{
uint mask = (uint)(0x01 << (remBits - 1));
data[dwords - 1] |= mask;
mask = (uint)(0xFFFFFFFF >> (32 - remBits));
data[dwords - 1] &= mask;
}
else
data[dwords - 1] |= 0x80000000;
dataLength = dwords;
if (dataLength == 0)
dataLength = 1;
}
