/// <summary>
/// Initializes a new instance of the <see cref="CurveParameters"/> struct
/// with the given values.
/// </summary>
/// <returns><see cref="CurveParameters"/> instance with the given
/// parameters.</returns>
/// <param name="curveEquation">The <see cref="CurveEquation"/> describing the curve.</param>
/// <param name="generator">Curve generator point.</param>
/// <param name="order">Generator order.</param>
/// <param name="cofactor">Curve cofactor.</param>
public CurveParameters(
CurveEquation curveEquation,
CurvePoint generator,
BigPrime order,
BigInteger cofactor
)
{
Equation = curveEquation;
Generator = generator;
Order = order;
Cofactor = cofactor;
}
/// <summary>
/// Initializes a new instance of the <see cref="CurveGroupAlgebra"/> class.
/// </summary>
/// <param name="parameters">The parameters of the elliptic curve.</param>
public CurveGroupAlgebra(CurveParameters parameters)
: base(
parameters.Generator,
parameters.Order,
parameters.Cofactor,
CurvePoint.PointAtInfinity,
2 * NumberLength.GetLength(parameters.Equation.Field.Modulo).InBits
)
{
_curveEquation = parameters.Equation;
if (!IsSafeElement(Generator))
{
throw new ArgumentException("The point given as generator is " +
"not a valid point on the curve.", nameof(parameters));
}
}
