Brunet.Security.PeerSec.PeerSecOverlord.HandleControlDHEWithCertificateAndCAs C# (CSharp) Метод

    protected void HandleControlDHEWithCertificateAndCAs(PeerSecAssociation sa,
        SecurityControlMessage scm, SecurityControlMessage scm_reply,
        ISender return_path, ISender low_level_sender)
    {
      ProtocolLog.WriteIf(ProtocolLog.Security, GetHashCode() + " Received DHEWithCertificateAndCAs from: " + low_level_sender);
      if(sa == null) {
        sa = CreateSecurityAssociation(low_level_sender, scm.SPI, false);
      }
      byte[] cert = new byte[scm.Certificate.Length];
      scm.Certificate.CopyTo(cert, 0);
      X509Certificate rcert = new X509Certificate(cert);
      _ch.Verify(rcert, low_level_sender);
      HashAlgorithm sha1 = new SHA1CryptoServiceProvider();
      scm.Verify((RSACryptoServiceProvider) rcert.RSA, sha1);

      X509Certificate lcert = null;
      if(SecurityPolicy.GetPolicy(scm.SPI).PreExchangedKeys) {
        lcert = _ch.DefaultCertificate;
      } else {
        lcert = _ch.FindCertificate(scm.CAs);
      }

      sa.LocalCertificate = lcert;
      sa.RemoteCertificate = rcert;
      sa.RDHE.Value = scm.DHE;
      sa.DHEWithCertificateAndCAsInHash.Value = MemBlock.Reference(sha1.ComputeHash((byte[]) scm.Packet));

      scm_reply.LocalCookie = scm.RemoteCookie;
      scm_reply.RemoteCookie = scm.LocalCookie;
      scm_reply.DHE = sa.LDHE;
      scm_reply.Certificate = MemBlock.Reference(lcert.RawData);
      scm_reply.Type = SecurityControlMessage.MessageType.DHEWithCertificate;
      lock(_private_key_lock) {
        scm_reply.Sign(_private_key, sha1);
      }
      sa.DHEWithCertificateHash.Value = MemBlock.Reference(sha1.ComputeHash((byte[]) scm_reply.Packet));

      ICopyable to_send = new CopyList(SecureControl, scm_reply.Packet);
      return_path.Send(to_send);
      ProtocolLog.WriteIf(ProtocolLog.Security, GetHashCode() + " Successful DHEWithCertificateAndCAs from: " + low_level_sender);
    }