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using System;
using System.IO;
namespace Org.BouncyCastle.Asn1
{
[Obsolete("Will be made non-public. Test for and use only Asn1TaggedObjectParser.")]
public class BerTaggedObjectParser
: Asn1TaggedObjectParser
{
internal readonly int m_tagClass;
internal readonly int m_tagNo;
internal readonly Asn1StreamParser m_parser;
internal BerTaggedObjectParser(int tagClass, int tagNo, Asn1StreamParser parser)
{
m_tagClass = tagClass;
m_tagNo = tagNo;
m_parser = parser;
}
public virtual bool IsConstructed
{
get { return true; }
}
public int TagClass
{
get { return m_tagClass; }
}
public int TagNo
{
get { return m_tagNo; }
}
public bool HasContextTag(int tagNo)
{
return m_tagClass == Asn1Tags.ContextSpecific && m_tagNo == tagNo;
}
public bool HasTag(int tagClass, int tagNo)
{
return m_tagClass == tagClass && m_tagNo == tagNo;
}
[Obsolete("Use 'Parse...' methods instead, after checking this parser's TagClass and TagNo")]
public IAsn1Convertible GetObjectParser(int baseTagNo, bool declaredExplicit)
{
if (Asn1Tags.ContextSpecific != TagClass)
throw new Asn1Exception("this method only valid for CONTEXT_SPECIFIC tags");
return ParseBaseUniversal(declaredExplicit, baseTagNo);
}
public virtual IAsn1Convertible ParseBaseUniversal(bool declaredExplicit, int baseTagNo)
{
if (declaredExplicit)
return m_parser.ParseObject(baseTagNo);
return m_parser.ParseImplicitConstructedIL(baseTagNo);
}
public virtual IAsn1Convertible ParseExplicitBaseObject()
{
return m_parser.ReadObject();
}
public virtual Asn1TaggedObjectParser ParseExplicitBaseTagged()
{
return m_parser.ParseTaggedObject();
}
public virtual Asn1TaggedObjectParser ParseImplicitBaseTagged(int baseTagClass, int baseTagNo)
{
// TODO[asn1] Special handling can be removed once ASN1ApplicationSpecificParser types removed.
if (Asn1Tags.Application == baseTagClass)
return new BerApplicationSpecificParser(baseTagNo, m_parser);
return new BerTaggedObjectParser(baseTagClass, baseTagNo, m_parser);
}
public virtual Asn1Object ToAsn1Object()
{
try
{
return m_parser.LoadTaggedIL(TagClass, TagNo);
}
catch (IOException e)
{
throw new Asn1ParsingException(e.Message);
}
}
}
}
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