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namespace Org.BouncyCastle.Asn1
{
/**
* DER TaggedObject - in ASN.1 notation this is any object preceded by
* a [n] where n is some number - these are assumed to follow the construction
* rules (as with sequences).
*/
public class DerTaggedObject
: Asn1TaggedObject
{
/**
* @param tagNo the tag number for this object.
* @param obj the tagged object.
*/
public DerTaggedObject(
int tagNo,
Asn1Encodable obj)
: base(tagNo, obj)
{
}
/**
* @param explicitly true if an explicitly tagged object.
* @param tagNo the tag number for this object.
* @param obj the tagged object.
*/
public DerTaggedObject(
bool explicitly,
int tagNo,
Asn1Encodable obj)
: base(explicitly, tagNo, obj)
{
}
/**
* create an implicitly tagged object that contains a zero
* length sequence.
*/
public DerTaggedObject(
int tagNo)
: base(false, tagNo, DerSequence.Empty)
{
}
internal override void Encode(
DerOutputStream derOut)
{
if (!IsEmpty())
{
byte[] bytes = obj.GetDerEncoded();
if (explicitly)
{
derOut.WriteEncoded(Asn1Tags.Constructed | Asn1Tags.Tagged, tagNo, bytes);
}
else
{
//
// need to mark constructed types... (preserve Constructed tag)
//
int flags = (bytes[0] & Asn1Tags.Constructed) | Asn1Tags.Tagged;
derOut.WriteTag(flags, tagNo);
derOut.Write(bytes, 1, bytes.Length - 1);
}
}
else
{
derOut.WriteEncoded(Asn1Tags.Constructed | Asn1Tags.Tagged, tagNo, new byte[0]);
}
}
}
}
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