init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Ess/EssCertIDv2.cs

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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 readonly AlgorithmIdentifier hashAlgorithm;
+
+	private readonly byte[] certHash;
+
+	private readonly IssuerSerial issuerSerial;
+
+	private static readonly AlgorithmIdentifier DefaultAlgID = new AlgorithmIdentifier(NistObjectIdentifiers.IdSha256);
+
+	public AlgorithmIdentifier HashAlgorithm => hashAlgorithm;
+
+	public IssuerSerial IssuerSerial => issuerSerial;
+
+	public static EssCertIDv2 GetInstance(object obj)
+	{
+		if (obj == null)
+		{
+			return null;
+		}
+		if (obj is EssCertIDv2 result)
+		{
+			return result;
+		}
+		return new EssCertIDv2(Asn1Sequence.GetInstance(obj));
+	}
+
+	private EssCertIDv2(Asn1Sequence seq)
+	{
+		if (seq.Count > 3)
+		{
+			throw new ArgumentException("Bad sequence size: " + seq.Count, "seq");
+		}
+		int num = 0;
+		if (seq[0] is Asn1OctetString)
+		{
+			hashAlgorithm = DefaultAlgID;
+		}
+		else
+		{
+			hashAlgorithm = AlgorithmIdentifier.GetInstance(seq[num++].ToAsn1Object());
+		}
+		certHash = Asn1OctetString.GetInstance(seq[num++].ToAsn1Object()).GetOctets();
+		if (seq.Count > num)
+		{
+			issuerSerial = IssuerSerial.GetInstance(Asn1Sequence.GetInstance(seq[num].ToAsn1Object()));
+		}
+	}
+
+	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)
+	{
+		if (algId == null)
+		{
+			hashAlgorithm = DefaultAlgID;
+		}
+		else
+		{
+			hashAlgorithm = algId;
+		}
+		this.certHash = certHash;
+		this.issuerSerial = issuerSerial;
+	}
+
+	public byte[] GetCertHash()
+	{
+		return Arrays.Clone(certHash);
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
+		if (!hashAlgorithm.Equals(DefaultAlgID))
+		{
+			asn1EncodableVector.Add(hashAlgorithm);
+		}
+		asn1EncodableVector.Add(new DerOctetString(certHash).ToAsn1Object());
+		if (issuerSerial != null)
+		{
+			asn1EncodableVector.Add(issuerSerial);
+		}
+		return new DerSequence(asn1EncodableVector);
+	}
+}