init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Bcpg/SignatureSubpacket.cs

@@ -0,0 +1,79 @@
+using System.IO;
+
+namespace Org.BouncyCastle.Bcpg;
+
+public class SignatureSubpacket
+{
+	private readonly SignatureSubpacketTag type;
+
+	private readonly bool critical;
+
+	private readonly bool isLongLength;
+
+	internal byte[] data;
+
+	public SignatureSubpacketTag SubpacketType => type;
+
+	protected internal SignatureSubpacket(SignatureSubpacketTag type, bool critical, bool isLongLength, byte[] data)
+	{
+		this.type = type;
+		this.critical = critical;
+		this.isLongLength = isLongLength;
+		this.data = data;
+	}
+
+	public bool IsCritical()
+	{
+		return critical;
+	}
+
+	public bool IsLongLength()
+	{
+		return isLongLength;
+	}
+
+	public byte[] GetData()
+	{
+		return (byte[])data.Clone();
+	}
+
+	public void Encode(Stream os)
+	{
+		int num = data.Length + 1;
+		if (isLongLength)
+		{
+			os.WriteByte(byte.MaxValue);
+			os.WriteByte((byte)(num >> 24));
+			os.WriteByte((byte)(num >> 16));
+			os.WriteByte((byte)(num >> 8));
+			os.WriteByte((byte)num);
+		}
+		else if (num < 192)
+		{
+			os.WriteByte((byte)num);
+		}
+		else if (num <= 8383)
+		{
+			num -= 192;
+			os.WriteByte((byte)(((num >> 8) & 0xFF) + 192));
+			os.WriteByte((byte)num);
+		}
+		else
+		{
+			os.WriteByte(byte.MaxValue);
+			os.WriteByte((byte)(num >> 24));
+			os.WriteByte((byte)(num >> 16));
+			os.WriteByte((byte)(num >> 8));
+			os.WriteByte((byte)num);
+		}
+		if (critical)
+		{
+			os.WriteByte((byte)((SignatureSubpacketTag)128 | type));
+		}
+		else
+		{
+			os.WriteByte((byte)type);
+		}
+		os.Write(data, 0, data.Length);
+	}
+}