SignatureSubpacket.cs
2.44 KB
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using System.IO;
namespace Org.BouncyCastle.Bcpg
{
/// <remarks>Basic type for a PGP Signature sub-packet.</remarks>
public class SignatureSubpacket
{
private readonly SignatureSubpacketTag type;
private readonly bool critical;
private readonly bool isLongLength;
internal byte[] data;
protected internal SignatureSubpacket(
SignatureSubpacketTag type,
bool critical,
bool isLongLength,
byte[] data)
{
this.type = type;
this.critical = critical;
this.isLongLength = isLongLength;
this.data = data;
}
public SignatureSubpacketTag SubpacketType
{
get { return type; }
}
public bool IsCritical()
{
return critical;
}
public bool IsLongLength()
{
return isLongLength;
}
/// <summary>Return the generic data making up the packet.</summary>
public byte[] GetData()
{
return (byte[]) data.Clone();
}
public void Encode(
Stream os)
{
int bodyLen = data.Length + 1;
if (isLongLength)
{
os.WriteByte(0xff);
os.WriteByte((byte)(bodyLen >> 24));
os.WriteByte((byte)(bodyLen >> 16));
os.WriteByte((byte)(bodyLen >> 8));
os.WriteByte((byte)bodyLen);
}
else
{
if (bodyLen < 192)
{
os.WriteByte((byte)bodyLen);
}
else if (bodyLen <= 8383)
{
bodyLen -= 192;
os.WriteByte((byte)(((bodyLen >> 8) & 0xff) + 192));
os.WriteByte((byte)bodyLen);
}
else
{
os.WriteByte(0xff);
os.WriteByte((byte)(bodyLen >> 24));
os.WriteByte((byte)(bodyLen >> 16));
os.WriteByte((byte)(bodyLen >> 8));
os.WriteByte((byte)bodyLen);
}
}
if (critical)
{
os.WriteByte((byte)(0x80 | (int) type));
}
else
{
os.WriteByte((byte) type);
}
os.Write(data, 0, data.Length);
}
}
}