PGPKeyRing.cs :  » PDF » iTextSharp » Org » BouncyCastle » Bcpg » OpenPgp » C# / CSharp Open Source

using System.Collections;
using System.IO;

namespace Org.BouncyCastle.Bcpg.OpenPgp{
  public abstract class PgpKeyRing
    : PgpObject
  {
    internal PgpKeyRing()
    {
    }

    internal static TrustPacket ReadOptionalTrustPacket(
      BcpgInputStream bcpgInput)
    {
      return (bcpgInput.NextPacketTag() == PacketTag.Trust)
        ?  (TrustPacket) bcpgInput.ReadPacket()
        :  null;
    }

    internal static ArrayList ReadSignaturesAndTrust(
      BcpgInputStream  bcpgInput)
    {
      try
      {
        ArrayList sigList = new ArrayList();

        while (bcpgInput.NextPacketTag() == PacketTag.Signature)
        {
          SignaturePacket signaturePacket = (SignaturePacket) bcpgInput.ReadPacket();
          TrustPacket trustPacket = ReadOptionalTrustPacket(bcpgInput);

          sigList.Add(new PgpSignature(signaturePacket, trustPacket));
        }

        return sigList;
      }
      catch (PgpException e)
      {
        throw new IOException("can't create signature object: " + e.Message, e);
      }
    }

    internal static void ReadUserIDs(
      BcpgInputStream  bcpgInput,
      out ArrayList  ids,
      out ArrayList  idTrusts,
      out ArrayList  idSigs)
    {
      ids = new ArrayList();
      idTrusts = new ArrayList();
      idSigs = new ArrayList();

      while (bcpgInput.NextPacketTag() == PacketTag.UserId
        || bcpgInput.NextPacketTag() == PacketTag.UserAttribute)
      {
        Packet obj = bcpgInput.ReadPacket();
        if (obj is UserIdPacket)
        {
          UserIdPacket id = (UserIdPacket)obj;
          ids.Add(id.GetId());
        }
        else
        {
          UserAttributePacket user = (UserAttributePacket) obj;
          ids.Add(new PgpUserAttributeSubpacketVector(user.GetSubpackets()));
        }

        idTrusts.Add(
          ReadOptionalTrustPacket(bcpgInput));

        idSigs.Add(
          ReadSignaturesAndTrust(bcpgInput));
      }
    }
  }
}