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using System;
namespace Org.BouncyCastle.Asn1.X509
{
/**
* an X509Certificate structure.
* <pre>
* Certificate ::= Sequence {
* tbsCertificate TbsCertificate,
* signatureAlgorithm AlgorithmIdentifier,
* signature BIT STRING
* }
* </pre>
*/
public class X509CertificateStructure
: Asn1Encodable
{
public static X509CertificateStructure GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is X509CertificateStructure x509CertificateStructure)
return x509CertificateStructure;
return new X509CertificateStructure(Asn1Sequence.GetInstance(obj));
}
public static X509CertificateStructure GetInstance(Asn1TaggedObject obj, bool explicitly) =>
new X509CertificateStructure(Asn1Sequence.GetInstance(obj, explicitly));
public static X509CertificateStructure GetOptional(Asn1Encodable element)
{
if (element == null)
throw new ArgumentNullException(nameof(element));
if (element is X509CertificateStructure x509CertificateStructure)
return x509CertificateStructure;
Asn1Sequence asn1Sequence = Asn1Sequence.GetOptional(element);
if (asn1Sequence != null)
return new X509CertificateStructure(asn1Sequence);
return null;
}
public static X509CertificateStructure GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
new X509CertificateStructure(Asn1Sequence.GetTagged(taggedObject, declaredExplicit));
private readonly TbsCertificateStructure m_tbsCert;
private readonly AlgorithmIdentifier m_sigAlgID;
private readonly DerBitString m_sig;
public X509CertificateStructure(TbsCertificateStructure tbsCert, AlgorithmIdentifier sigAlgID, DerBitString sig)
{
m_tbsCert = tbsCert ?? throw new ArgumentNullException(nameof(tbsCert));
m_sigAlgID = sigAlgID ?? throw new ArgumentNullException(nameof(sigAlgID));
m_sig = sig ?? throw new ArgumentNullException(nameof(sig));
}
private X509CertificateStructure(Asn1Sequence seq)
{
int count = seq.Count;
if (count != 3)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
//
// correct x509 certficate
//
m_tbsCert = TbsCertificateStructure.GetInstance(seq[0]);
m_sigAlgID = AlgorithmIdentifier.GetInstance(seq[1]);
m_sig = DerBitString.GetInstance(seq[2]);
}
public TbsCertificateStructure TbsCertificate => m_tbsCert;
public int Version => m_tbsCert.Version;
public DerInteger SerialNumber => m_tbsCert.SerialNumber;
public X509Name Issuer => m_tbsCert.Issuer;
public Time StartDate => m_tbsCert.StartDate;
public Time EndDate => m_tbsCert.EndDate;
public X509Name Subject => m_tbsCert.Subject;
public SubjectPublicKeyInfo SubjectPublicKeyInfo => m_tbsCert.SubjectPublicKeyInfo;
public AlgorithmIdentifier SignatureAlgorithm => m_sigAlgID;
public DerBitString Signature => m_sig;
public byte[] GetSignatureOctets() => m_sig.GetOctets();
public override Asn1Object ToAsn1Object() => new DerSequence(m_tbsCert, m_sigAlgID, m_sig);
}
}
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