internal PublicSubkeyPacket(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
}
/// <param name="bcpgIn">The stream to read the packet from.</param>
protected ECPublicBcpgKey(
BcpgInputStream bcpgIn)
{
this.oid = DerObjectIdentifier.GetInstance(Asn1Object.FromByteArray(ReadBytesOfEncodedLength(bcpgIn)));
this.point = new MPInteger(bcpgIn).Value;
}
public UserIdPacket(
BcpgInputStream bcpgIn)
{
this.idData = bcpgIn.ReadAll();
}
internal CompressedDataPacket(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
this.algorithm = (CompressionAlgorithmTag)bcpgIn.ReadByte();
}
public Packet ReadPacket()
{
int hdr = this.ReadByte();
if (hdr < 0)
{
return(null);
}
if ((hdr & 0x80) == 0)
{
throw new IOException("invalid header encountered");
}
bool newPacket = (hdr & 0x40) != 0;
PacketTag tag = 0;
int bodyLen = 0;
bool partial = false;
if (newPacket)
{
tag = (PacketTag)(hdr & 0x3f);
int l = this.ReadByte();
if (l < 192)
{
bodyLen = l;
}
else if (l <= 223)
{
int b = m_in.ReadByte();
bodyLen = ((l - 192) << 8) + (b) + 192;
}
else if (l == 255)
{
bodyLen = (m_in.ReadByte() << 24) | (m_in.ReadByte() << 16)
| (m_in.ReadByte() << 8) | m_in.ReadByte();
}
else
{
partial = true;
bodyLen = 1 << (l & 0x1f);
}
}
else
{
int lengthType = hdr & 0x3;
tag = (PacketTag)((hdr & 0x3f) >> 2);
switch (lengthType)
{
case 0:
bodyLen = this.ReadByte();
break;
case 1:
bodyLen = (this.ReadByte() << 8) | this.ReadByte();
break;
case 2:
bodyLen = (this.ReadByte() << 24) | (this.ReadByte() << 16)
| (this.ReadByte() << 8) | this.ReadByte();
break;
case 3:
partial = true;
break;
default:
throw new IOException("unknown length type encountered");
}
}
BcpgInputStream objStream;
if (bodyLen == 0 && partial)
{
objStream = this;
}
else
{
PartialInputStream pis = new PartialInputStream(this, partial, bodyLen);
objStream = new BcpgInputStream(pis);
}
switch (tag)
{
case PacketTag.Reserved:
return(new InputStreamPacket(objStream));
case PacketTag.PublicKeyEncryptedSession:
return(new PublicKeyEncSessionPacket(objStream));
case PacketTag.Signature:
return(new SignaturePacket(objStream));
case PacketTag.SymmetricKeyEncryptedSessionKey:
return(new SymmetricKeyEncSessionPacket(objStream));
case PacketTag.OnePassSignature:
return(new OnePassSignaturePacket(objStream));
case PacketTag.SecretKey:
return(new SecretKeyPacket(objStream));
case PacketTag.PublicKey:
return(new PublicKeyPacket(objStream));
case PacketTag.SecretSubkey:
return(new SecretSubkeyPacket(objStream));
case PacketTag.CompressedData:
return(new CompressedDataPacket(objStream));
case PacketTag.SymmetricKeyEncrypted:
return(new SymmetricEncDataPacket(objStream));
case PacketTag.Marker:
return(new MarkerPacket(objStream));
case PacketTag.LiteralData:
return(new LiteralDataPacket(objStream));
case PacketTag.Trust:
return(new TrustPacket(objStream));
case PacketTag.UserId:
return(new UserIdPacket(objStream));
case PacketTag.UserAttribute:
return(new UserAttributePacket(objStream));
case PacketTag.PublicSubkey:
return(new PublicSubkeyPacket(objStream));
case PacketTag.SymmetricEncryptedIntegrityProtected:
return(new SymmetricEncIntegrityPacket(objStream));
case PacketTag.ModificationDetectionCode:
return(new ModDetectionCodePacket(objStream));
case PacketTag.Experimental1:
case PacketTag.Experimental2:
case PacketTag.Experimental3:
case PacketTag.Experimental4:
return(new ExperimentalPacket(tag, objStream));
default:
throw new IOException("unknown packet type encountered: " + tag);
}
}
