init commit

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

@@ -0,0 +1,54 @@
+using System.IO;
+
+namespace Org.BouncyCastle.Bcpg;
+
+public class SymmetricKeyEncSessionPacket : ContainedPacket
+{
+	private int version;
+
+	private SymmetricKeyAlgorithmTag encAlgorithm;
+
+	private S2k s2k;
+
+	private readonly byte[] secKeyData;
+
+	public SymmetricKeyAlgorithmTag EncAlgorithm => encAlgorithm;
+
+	public S2k S2k => s2k;
+
+	public int Version => version;
+
+	public SymmetricKeyEncSessionPacket(BcpgInputStream bcpgIn)
+	{
+		version = bcpgIn.ReadByte();
+		encAlgorithm = (SymmetricKeyAlgorithmTag)bcpgIn.ReadByte();
+		s2k = new S2k(bcpgIn);
+		secKeyData = bcpgIn.ReadAll();
+	}
+
+	public SymmetricKeyEncSessionPacket(SymmetricKeyAlgorithmTag encAlgorithm, S2k s2k, byte[] secKeyData)
+	{
+		version = 4;
+		this.encAlgorithm = encAlgorithm;
+		this.s2k = s2k;
+		this.secKeyData = secKeyData;
+	}
+
+	public byte[] GetSecKeyData()
+	{
+		return secKeyData;
+	}
+
+	public override void Encode(BcpgOutputStream bcpgOut)
+	{
+		MemoryStream memoryStream = new MemoryStream();
+		BcpgOutputStream bcpgOutputStream = new BcpgOutputStream(memoryStream);
+		bcpgOutputStream.Write((byte)version, (byte)encAlgorithm);
+		bcpgOutputStream.WriteObject(s2k);
+		if (secKeyData != null && secKeyData.Length > 0)
+		{
+			bcpgOutputStream.Write(secKeyData);
+		}
+		bcpgOut.WritePacket(PacketTag.SymmetricKeyEncryptedSessionKey, memoryStream.ToArray(), oldFormat: true);
+	}
+}