init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/ConstructedOctetStream.cs

@@ -0,0 +1,92 @@
+using System.IO;
+using Org.BouncyCastle.Utilities.IO;
+
+namespace Org.BouncyCastle.Asn1;
+
+internal class ConstructedOctetStream : BaseInputStream
+{
+	private readonly Asn1StreamParser _parser;
+
+	private bool _first = true;
+
+	private Stream _currentStream;
+
+	internal ConstructedOctetStream(Asn1StreamParser parser)
+	{
+		_parser = parser;
+	}
+
+	public override int Read(byte[] buffer, int offset, int count)
+	{
+		if (_currentStream == null)
+		{
+			if (!_first)
+			{
+				return 0;
+			}
+			Asn1OctetStringParser asn1OctetStringParser = (Asn1OctetStringParser)_parser.ReadObject();
+			if (asn1OctetStringParser == null)
+			{
+				return 0;
+			}
+			_first = false;
+			_currentStream = asn1OctetStringParser.GetOctetStream();
+		}
+		int num = 0;
+		while (true)
+		{
+			int num2 = _currentStream.Read(buffer, offset + num, count - num);
+			if (num2 > 0)
+			{
+				num += num2;
+				if (num == count)
+				{
+					return num;
+				}
+				continue;
+			}
+			Asn1OctetStringParser asn1OctetStringParser2 = (Asn1OctetStringParser)_parser.ReadObject();
+			if (asn1OctetStringParser2 == null)
+			{
+				break;
+			}
+			_currentStream = asn1OctetStringParser2.GetOctetStream();
+		}
+		_currentStream = null;
+		return num;
+	}
+
+	public override int ReadByte()
+	{
+		if (_currentStream == null)
+		{
+			if (!_first)
+			{
+				return 0;
+			}
+			Asn1OctetStringParser asn1OctetStringParser = (Asn1OctetStringParser)_parser.ReadObject();
+			if (asn1OctetStringParser == null)
+			{
+				return 0;
+			}
+			_first = false;
+			_currentStream = asn1OctetStringParser.GetOctetStream();
+		}
+		while (true)
+		{
+			int num = _currentStream.ReadByte();
+			if (num >= 0)
+			{
+				return num;
+			}
+			Asn1OctetStringParser asn1OctetStringParser2 = (Asn1OctetStringParser)_parser.ReadObject();
+			if (asn1OctetStringParser2 == null)
+			{
+				break;
+			}
+			_currentStream = asn1OctetStringParser2.GetOctetStream();
+		}
+		_currentStream = null;
+		return -1;
+	}
+}