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using System;
using Org.BouncyCastle.Asn1.Nist;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Ess
{
public class EssCertIDv2
: Asn1Encodable
{
private static readonly AlgorithmIdentifier DefaultAlgID = new AlgorithmIdentifier(
NistObjectIdentifiers.IdSha256);
public static EssCertIDv2 GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is EssCertIDv2 essCertIDv2)
return essCertIDv2;
return new EssCertIDv2(Asn1Sequence.GetInstance(obj));
}
public static EssCertIDv2 GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return new EssCertIDv2(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
}
private readonly AlgorithmIdentifier m_hashAlgorithm;
private readonly Asn1OctetString m_certHash;
private readonly IssuerSerial m_issuerSerial;
private EssCertIDv2(Asn1Sequence seq)
{
int count = seq.Count, pos = 0;
if (count < 1 || count > 3)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
m_hashAlgorithm = Asn1Utilities.ReadOptional(seq, ref pos, AlgorithmIdentifier.GetOptional)
?? DefaultAlgID;
m_certHash = Asn1OctetString.GetInstance(seq[pos++]);
m_issuerSerial = Asn1Utilities.ReadOptional(seq, ref pos, IssuerSerial.GetOptional);
if (pos != count)
throw new ArgumentException("Unexpected elements in sequence", nameof(seq));
}
public EssCertIDv2(byte[] certHash)
: this(null, certHash, null)
{
}
public EssCertIDv2(AlgorithmIdentifier algId, byte[] certHash)
: this(algId, certHash, null)
{
}
public EssCertIDv2(byte[] certHash, IssuerSerial issuerSerial)
: this(null, certHash, issuerSerial)
{
}
public EssCertIDv2(AlgorithmIdentifier algId, byte[] certHash, IssuerSerial issuerSerial)
{
m_hashAlgorithm = algId ?? DefaultAlgID;
m_certHash = new DerOctetString(certHash);
m_issuerSerial = issuerSerial;
}
public AlgorithmIdentifier HashAlgorithm => m_hashAlgorithm;
public byte[] GetCertHash() => Arrays.Clone(m_certHash.GetOctets());
public IssuerSerial IssuerSerial => m_issuerSerial;
/**
* <pre>
* EssCertIDv2 ::= SEQUENCE {
* hashAlgorithm AlgorithmIdentifier
* DEFAULT {algorithm id-sha256},
* certHash Hash,
* issuerSerial IssuerSerial OPTIONAL
* }
*
* Hash ::= OCTET STRING
*
* IssuerSerial ::= SEQUENCE {
* issuer GeneralNames,
* serialNumber CertificateSerialNumber
* }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(3);
if (!DefaultAlgID.Equals(m_hashAlgorithm))
{
v.Add(m_hashAlgorithm);
}
v.Add(m_certHash);
v.AddOptional(m_issuerSerial);
return new DerSequence(v);
}
}
}
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