using System.Collections.Generic; using System.IO; namespace Org.BouncyCastle.Bcpg.OpenPgp { public abstract class PgpKeyRing : PgpObject { internal PgpKeyRing() { } internal static TrustPacket ReadOptionalTrustPacket(BcpgInputStream pIn) { if (pIn.SkipMarkerPackets() != PacketTag.Trust) return null; return (TrustPacket)pIn.ReadPacket(); } internal static IList<PgpSignature> ReadSignaturesAndTrust(BcpgInputStream pIn) { try { List<PgpSignature> list = new List<PgpSignature>(); while (pIn.SkipMarkerPackets() == PacketTag.Signature) { SignaturePacket sigPacket = (SignaturePacket)pIn.ReadPacket(); TrustPacket trustPacket = ReadOptionalTrustPacket(pIn); list.Add(new PgpSignature(sigPacket, trustPacket)); } return list; } catch (PgpException ex) { throw new IOException("can't create signature object: " + ex.Message, ex); } } internal static void ReadUserIDs(BcpgInputStream pIn, out IList<IUserDataPacket> ids, out IList<TrustPacket> idTrusts, out IList<IList<PgpSignature>> idSigs) { ids = new List<IUserDataPacket>(); idTrusts = new List<TrustPacket>(); idSigs = new List<IList<PgpSignature>>(); while (IsUserTag(pIn.SkipMarkerPackets())) { Packet packet = pIn.ReadPacket(); UserIdPacket userIdPacket = packet as UserIdPacket; if (userIdPacket != null) ids.Add(userIdPacket); else { UserAttributePacket userAttributePacket = (UserAttributePacket)packet; ids.Add(new PgpUserAttributeSubpacketVector(userAttributePacket.GetSubpackets())); } idTrusts.Add(ReadOptionalTrustPacket(pIn)); idSigs.Add(ReadSignaturesAndTrust(pIn)); } } private static bool IsUserTag(PacketTag tag) { if (tag == PacketTag.UserId || tag == PacketTag.UserAttribute) return true; return false; } } }