// Public Constructors
public Asn1Tag(Stream dataStream) : base()
{
Byte b = ReadByte(dataStream);
tagNumber = GetNumber(b);
tagType = GetType(b);
tagClass = GetClass(b);
if (tagNumber == Asn1TagNumber.HIGHNUMBER)
{
UInt32 tagNo = 0;
b = ReadByte(dataStream);
if ((b & 0x7F) == 0x00)
{
throw new IOException("Invalid tag number!");
}
else
{
while ((b & 0x80) == 0x80)
{
// Get bits from intermdeiate octets
tagNo |= (UInt32)(b & 0x7F);
tagNo <<= 7;
// Read next byte from dataStream
b = ReadByte(dataStream);
}
// Get bits from last octet
tagNo |= (UInt32)(b & 0x7F);
}
tagNumber = (Asn1TagNumber)tagNo;
}
}
// Public Constructors
public Asn1Tag( Stream dataStream )
: base()
{
Byte b = ReadByte(dataStream);
tagNumber = GetNumber(b);
tagType = GetType(b);
tagClass = GetClass(b);
if (tagNumber == Asn1TagNumber.HIGHNUMBER)
{
UInt32 tagNo = 0;
b = ReadByte(dataStream);
if ((b & 0x7F) == 0x00)
throw new IOException("Invalid tag number!");
else
{
while ((b & 0x80) == 0x80)
{
// Get bits from intermdeiate octets
tagNo |= (UInt32)(b & 0x7F);
tagNo <<= 7;
// Read next byte from dataStream
b = ReadByte(dataStream);
}
// Get bits from last octet
tagNo |= (UInt32) (b & 0x7F);
}
tagNumber = (Asn1TagNumber) tagNo;
}
}
