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using System;
using System.IO;
namespace Org.BouncyCastle.Bcpg
{
/**
* Basic type for a symmetric encrypted session key packet
*/
public class SymmetricKeyEncSessionPacket
: ContainedPacket
{
private int version;
private SymmetricKeyAlgorithmTag encAlgorithm;
private S2k s2k;
private readonly byte[] secKeyData;
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)
{
this.version = 4;
this.encAlgorithm = encAlgorithm;
this.s2k = s2k;
this.secKeyData = secKeyData;
}
/**
* @return int
*/
public SymmetricKeyAlgorithmTag EncAlgorithm
{
get { return encAlgorithm; }
}
/**
* @return S2k
*/
public S2k S2k
{
get { return s2k; }
}
/**
* @return byte[]
*/
public byte[] GetSecKeyData()
{
return secKeyData;
}
/**
* @return int
*/
public int Version
{
get { return version; }
}
public override void Encode(
BcpgOutputStream bcpgOut)
{
MemoryStream bOut = new MemoryStream();
BcpgOutputStream pOut = new BcpgOutputStream(bOut);
pOut.Write(
(byte) version,
(byte) encAlgorithm);
pOut.WriteObject(s2k);
if (secKeyData != null && secKeyData.Length > 0)
{
pOut.Write(secKeyData);
}
bcpgOut.WritePacket(PacketTag.SymmetricKeyEncryptedSessionKey, bOut.ToArray(), true);
}
}
}
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