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using System;
namespace Org.BouncyCastle.Asn1.Pkcs
{
public class SafeBag
: Asn1Encodable
{
public static SafeBag GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is SafeBag safeBag)
return safeBag;
return new SafeBag(Asn1Sequence.GetInstance(obj));
}
public static SafeBag GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return new SafeBag(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
}
private readonly DerObjectIdentifier m_bagID;
private readonly Asn1Object m_bagValue;
private readonly Asn1Set m_bagAttributes;
private SafeBag(Asn1Sequence seq)
{
int count = seq.Count, pos = 0;
if (count < 2 || count > 3)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
m_bagID = DerObjectIdentifier.GetInstance(seq[pos++]);
m_bagValue = Asn1TaggedObject.GetInstance(seq[pos++], Asn1Tags.ContextSpecific, 0)
.GetExplicitBaseObject().ToAsn1Object();
m_bagAttributes = Asn1Utilities.ReadOptional(seq, ref pos, Asn1Set.GetOptional);
if (pos != count)
throw new ArgumentException("Unexpected elements in sequence", nameof(seq));
}
public SafeBag(DerObjectIdentifier oid, Asn1Object obj)
: this(oid, obj, null)
{
}
public SafeBag(DerObjectIdentifier oid, Asn1Object obj, Asn1Set bagAttributes)
{
m_bagID = oid ?? throw new ArgumentNullException(nameof(oid));
m_bagValue = obj ?? throw new ArgumentNullException(nameof(obj));
m_bagAttributes = bagAttributes;
}
public DerObjectIdentifier BagID => m_bagID;
public Asn1Object BagValue => m_bagValue;
public Asn1Set BagAttributes => m_bagAttributes;
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(3);
v.Add(m_bagID, new DerTaggedObject(0, m_bagValue));
v.AddOptional(m_bagAttributes);
return new DerSequence(v);
}
}
}
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