public DHParameters(
BigInteger p,
BigInteger g,
BigInteger q,
int m,
int l,
BigInteger j,
DHValidationParameters validation)
{
if (p == null)
{
throw new ArgumentNullException("p");
}
if (g == null)
{
throw new ArgumentNullException("g");
}
if (!p.TestBit(0))
{
throw new ArgumentException("field must be an odd prime", "p");
}
if (g.CompareTo(BigInteger.Two) < 0 ||
g.CompareTo(p.Subtract(BigInteger.Two)) > 0)
{
throw new ArgumentException("generator must in the range [2, p - 2]", "g");
}
if (q != null && q.BitLength >= p.BitLength)
{
throw new ArgumentException("q too big to be a factor of (p-1)", "q");
}
if (m >= p.BitLength)
{
throw new ArgumentException("m value must be < bitlength of p", "m");
}
if (l != 0)
{
// TODO Check this against the Java version, which has 'l > p.BitLength' here
if (l >= p.BitLength)
{
throw new ArgumentException("when l value specified, it must be less than bitlength(p)", "l");
}
if (l < m)
{
throw new ArgumentException("when l value specified, it may not be less than m value", "l");
}
}
if (j != null && j.CompareTo(BigInteger.Two) < 0)
{
throw new ArgumentException("subgroup factor must be >= 2", "j");
}
// TODO If q, j both provided, validate p = jq + 1 ?
this.p = p;
this.g = g;
this.q = q;
this.m = m;
this.l = l;
this.j = j;
this.validation = validation;
}
protected bool Equals(
DHValidationParameters other)
{
return(counter == other.counter &&
Arrays.AreEqual(this.seed, other.seed));
}