private void IterateState()
{
QByte[] newStates = new QByte[8];
for (int i = 0; i < 8; i++)
{
uint op1 = RabbitUtils.g_function(this.states[i], this.counters[i]);
uint op2 = RabbitUtils.g_function(this.states[(i + 7) % 8], this.counters[(i + 7) % 8]);
uint op3 = RabbitUtils.g_function(this.states[(i + 6) % 8], this.counters[(i + 6) % 8]);
if (i % 2 == 0)
{
op2 = RabbitUtils.LeftRotate(op2, 16);
op3 = RabbitUtils.LeftRotate(op3, 16);
}
else
{
op2 = RabbitUtils.LeftRotate(op2, 8);
}
ulong tmp = op1 + op2 + op3;
uint result = (uint)(tmp % uint.MaxValue);
newStates[i] = new QByte(result);
}
this.states = newStates;
}
/// <summary>
/// Helper function defined in the original paper for iterating the state
/// </summary>
public static uint g_function(QByte state, QByte counter)
{
uint x = state.ToUInt();
uint y = counter.ToUInt();
ulong op1 = (x + y) % uint.MaxValue;
op1 *= op1;
//uint op2 = op1 >> 32;
uint result = (uint)(op1 ^ (op1 >> 32)) % uint.MaxValue;
return(result);
}
private void IterateCounters()
{
QByte[] newCounters = new QByte[8];
for (int i = 0; i < 8; i++)
{
uint result;
try
{
result = checked (this.counters[i].ToUInt() + Rabbit.aConstants[i] + this.carry);
this.carry = 0;
}
catch (OverflowException)
{
result = this.counters[i].ToUInt() + Rabbit.aConstants[i] + this.carry;
this.carry = 1;
}
newCounters[i] = new QByte(result);
}
this.counters = newCounters;
}
