public void Init(
ICipherParameters parameters)
{
AsymmetricKeyParameter kParam;
if (parameters is ParametersWithRandom)
{
ParametersWithRandom rParam = (ParametersWithRandom)parameters;
this.random = rParam.Random;
kParam = (AsymmetricKeyParameter)rParam.Parameters;
}
else
{
this.random = new SecureRandom();
kParam = (AsymmetricKeyParameter)parameters;
}
if (!(kParam is DHPrivateKeyParameters))
{
throw new ArgumentException("DHEngine expects DHPrivateKeyParameters");
}
this.key = (DHPrivateKeyParameters)kParam;
this.dhParams = key.Parameters;
}
public void Init(
ICipherParameters parameters)
{
if (parameters is ParametersWithRandom)
{
parameters = ((ParametersWithRandom) parameters).Parameters;
}
if (!(parameters is DHPrivateKeyParameters))
{
throw new ArgumentException("DHEngine expects DHPrivateKeyParameters");
}
this.key = (DHPrivateKeyParameters) parameters;
this.dhParams = key.Parameters;
}
protected virtual void GenerateEphemeralClientKeyExchange(DHParameters dhParams, Stream output)
{
AsymmetricCipherKeyPair dhAgreeClientKeyPair = GenerateDHKeyPair(dhParams);
this.dhAgreeClientPrivateKey = (DHPrivateKeyParameters)dhAgreeClientKeyPair.Private;
BigInteger Yc = ((DHPublicKeyParameters)dhAgreeClientKeyPair.Public).Y;
byte[] keData = BigIntegers.AsUnsignedByteArray(Yc);
TlsUtilities.WriteUint24(keData.Length + 2, output);
TlsUtilities.WriteOpaque16(keData, output);
}
protected bool Equals(
DHPrivateKeyParameters other)
{
return x.Equals(other.x) && base.Equals(other);
}
protected virtual byte[] CalculateDHBasicAgreement(DHPublicKeyParameters publicKey,
DHPrivateKeyParameters privateKey)
{
DHBasicAgreement dhAgree = new DHBasicAgreement();
dhAgree.Init(dhAgreeClientPrivateKey);
BigInteger agreement = dhAgree.CalculateAgreement(dhAgreeServerPublicKey);
return BigIntegers.AsUnsignedByteArray(agreement);
}