BasicAgreementWithKdf
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Crypto.Agreement.Kdf;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Crypto.Agreement
{
internal static class BasicAgreementWithKdf
{
internal static BigInteger CalculateAgreementWithKdf(string algorithm, IDerivationFunction kdf, int fieldSize, BigInteger result)
{
int defaultKeySize = GeneratorUtilities.GetDefaultKeySize(algorithm);
DHKdfParameters parameters = new DHKdfParameters(new DerObjectIdentifier(algorithm), defaultKeySize, BigIntegers.AsUnsignedByteArray(fieldSize, result));
kdf.Init(parameters);
byte[] array = new byte[defaultKeySize / 8];
kdf.GenerateBytes(array, 0, array.Length);
return new BigInteger(1, array);
}
}
}