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using System;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
namespace Org.BouncyCastle.Tls.Crypto.Impl.BC
{
/// <summary>Support class for ephemeral Elliptic Curve Diffie-Hellman using the BC light-weight library.</summary>
public class BcTlsECDH
: TlsAgreement
{
protected readonly BcTlsECDomain m_domain;
protected AsymmetricCipherKeyPair m_localKeyPair;
protected ECPublicKeyParameters m_peerPublicKey;
public BcTlsECDH(BcTlsECDomain domain)
{
this.m_domain = domain;
}
public virtual byte[] GenerateEphemeral()
{
this.m_localKeyPair = m_domain.GenerateKeyPair();
return m_domain.EncodePublicKey((ECPublicKeyParameters)m_localKeyPair.Public);
}
public virtual void ReceivePeerValue(byte[] peerValue)
{
this.m_peerPublicKey = m_domain.DecodePublicKey(peerValue);
}
public virtual TlsSecret CalculateSecret()
{
return m_domain.CalculateECDHAgreement((ECPrivateKeyParameters)m_localKeyPair.Private, m_peerPublicKey);
}
}
}
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