1 files changed, 71 insertions, 0 deletions
diff --git a/crypto/src/asn1/BERTaggedObjectParser.cs b/crypto/src/asn1/BERTaggedObjectParser.cs
new file mode 100644
index 000000000..354437a6a
--- /dev/null
+++ b/crypto/src/asn1/BERTaggedObjectParser.cs
@@ -0,0 +1,71 @@
+using System;
+using System.IO;
+
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1
+{
+	public class BerTaggedObjectParser
+		: Asn1TaggedObjectParser
+	{
+		private bool				_constructed;
+		private int					_tagNumber;
+		private Asn1StreamParser	_parser;
+
+		[Obsolete]
+		internal BerTaggedObjectParser(
+			int		baseTag,
+			int		tagNumber,
+			Stream	contentStream)
+			: this((baseTag & Asn1Tags.Constructed) != 0, tagNumber, new Asn1StreamParser(contentStream))
+		{
+		}
+
+		internal BerTaggedObjectParser(
+			bool				constructed,
+			int					tagNumber,
+			Asn1StreamParser	parser)
+		{
+			_constructed = constructed;
+			_tagNumber = tagNumber;
+			_parser = parser;
+		}
+
+		public bool IsConstructed
+		{
+			get { return _constructed; }
+		}
+
+		public int TagNo
+		{
+			get { return _tagNumber; }
+		}
+
+		public IAsn1Convertible GetObjectParser(
+			int		tag,
+			bool	isExplicit)
+		{
+			if (isExplicit)
+			{
+				if (!_constructed)
+					throw new IOException("Explicit tags must be constructed (see X.690 8.14.2)");
+
+				return _parser.ReadObject();
+			}
+
+			return _parser.ReadImplicit(_constructed, tag);
+		}
+
+		public Asn1Object ToAsn1Object()
+		{
+			try
+			{
+				return _parser.ReadTaggedObject(_constructed, _tagNumber);
+			}
+			catch (IOException e)
+			{
+				throw new Asn1ParsingException(e.Message);
+			}
+		}
+	}
+}