1 files changed, 79 insertions, 0 deletions
diff --git a/crypto/src/openpgp/PGPKeyRing.cs b/crypto/src/openpgp/PGPKeyRing.cs
new file mode 100644
index 000000000..6426f3f25
--- /dev/null
+++ b/crypto/src/openpgp/PGPKeyRing.cs
@@ -0,0 +1,79 @@
+using System.Collections;
+using System.IO;
+
+using Org.BouncyCastle.Utilities;
+
+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 IList ReadSignaturesAndTrust(
+			BcpgInputStream	bcpgInput)
+		{
+			try
+			{
+				IList sigList = Platform.CreateArrayList();
+
+				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 IList       ids,
+			out IList       idTrusts,
+			out IList       idSigs)
+		{
+			ids = Platform.CreateArrayList();
+            idTrusts = Platform.CreateArrayList();
+            idSigs = Platform.CreateArrayList();
+
+			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));
+			}
+		}
+	}
+}