internal OpenPgpPacketHeader(byte firstByte, Stream inputStream)
{
if ((firstByte & NewHeaderHighBits) != NewHeaderHighBits)
{
throw new ArgumentException();
}
_TagId = firstByte & ~NewHeaderHighBits;
// See 4.2.2.1: "A one-octet Body Length header encodes a length of 0 to 191 octets."
int firstLengthByte = inputStream.ReadByte();
if (firstLengthByte < 0)
{
throw new EndOfStreamException();
}
if (firstLengthByte < 192)
{
Length = firstLengthByte;
return;
}
// See 4.2.2.2: "A two-octet Body Length header encodes a length of 192 to 8383 octets."
if ((firstLengthByte >= 192) && (firstLengthByte <= 223))
{
int secondLengthByte = inputStream.ReadByte();
if (secondLengthByte < 0)
{
throw new EndOfStreamException();
}
Length = ((firstLengthByte - 192) << 8) + secondLengthByte + 192;
return;
}
// 4.2.2.3: "A five-octet Body Length header consists of a single octet holding the value 255, followed by a four-octet scalar."
if (firstLengthByte != 255)
{
throw new InvalidDataException();
}
Length = OpenPgpScalarNumber.Read(inputStream, 4);
}
public static OpenPgpTimeField Read(Stream inputStream)
{
return(new OpenPgpTimeField(OpenPgpScalarNumber.Read(inputStream, 4)));
}
