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using System;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.BC
{
/**
* Extension to tie an alternate certificate to the containing certificate.
* <pre>
* LinkedCertificate := SEQUENCE {
* digest DigestInfo, -- digest of PQC certificate
* certLocation GeneralName, -- location of PQC certificate
* certIssuer [0] Name OPTIONAL, -- issuer of PQC cert (if different from current certificate)
* cACerts [1] GeneralNames OPTIONAL, -- CA certificates for PQC cert (one of more locations)
* }
* </pre>
*/
public class LinkedCertificate
: Asn1Encodable
{
private readonly DigestInfo mDigest;
private readonly GeneralName mCertLocation;
private X509Name mCertIssuer;
private GeneralNames mCACerts;
public LinkedCertificate(DigestInfo digest, GeneralName certLocation)
: this(digest, certLocation, null, null)
{
}
public LinkedCertificate(DigestInfo digest, GeneralName certLocation, X509Name certIssuer, GeneralNames caCerts)
{
this.mDigest = digest;
this.mCertLocation = certLocation;
this.mCertIssuer = certIssuer;
this.mCACerts = caCerts;
}
private LinkedCertificate(Asn1Sequence seq)
{
this.mDigest = DigestInfo.GetInstance(seq[0]);
this.mCertLocation = GeneralName.GetInstance(seq[1]);
for (int i = 2; i < seq.Count; ++i)
{
Asn1TaggedObject tagged = Asn1TaggedObject.GetInstance(seq[i]);
switch (tagged.TagNo)
{
case 0:
this.mCertIssuer = X509Name.GetInstance(tagged, false);
break;
case 1:
this.mCACerts = GeneralNames.GetInstance(tagged, false);
break;
default:
throw new ArgumentException("unknown tag in tagged field");
}
}
}
public static LinkedCertificate GetInstance(object obj)
{
if (obj is LinkedCertificate)
return (LinkedCertificate)obj;
if (obj != null)
return new LinkedCertificate(Asn1Sequence.GetInstance(obj));
return null;
}
public virtual DigestInfo Digest
{
get { return mDigest; }
}
public virtual GeneralName CertLocation
{
get { return mCertLocation; }
}
public virtual X509Name CertIssuer
{
get { return mCertIssuer; }
}
public virtual GeneralNames CACerts
{
get { return mCACerts; }
}
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(mDigest, mCertLocation);
v.AddOptionalTagged(false, 0, mCertIssuer);
v.AddOptionalTagged(false, 1, mCACerts);
return new DerSequence(v);
}
}
}
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