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output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Cmp/CertificateConfirmationContentBuilder.cs

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+using System.Collections;
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Cmp;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Cms;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Security;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.X509;
+
+namespace Org.BouncyCastle.Cmp;
+
+public class CertificateConfirmationContentBuilder
+{
+	private static readonly DefaultSignatureAlgorithmIdentifierFinder sigAlgFinder = new DefaultSignatureAlgorithmIdentifierFinder();
+
+	private readonly DefaultDigestAlgorithmIdentifierFinder digestAlgFinder;
+
+	private readonly IList acceptedCerts = Platform.CreateArrayList();
+
+	private readonly IList acceptedReqIds = Platform.CreateArrayList();
+
+	public CertificateConfirmationContentBuilder()
+		: this(new DefaultDigestAlgorithmIdentifierFinder())
+	{
+	}
+
+	public CertificateConfirmationContentBuilder(DefaultDigestAlgorithmIdentifierFinder digestAlgFinder)
+	{
+		this.digestAlgFinder = digestAlgFinder;
+	}
+
+	public CertificateConfirmationContentBuilder AddAcceptedCertificate(X509Certificate certHolder, BigInteger certReqId)
+	{
+		acceptedCerts.Add(certHolder);
+		acceptedReqIds.Add(certReqId);
+		return this;
+	}
+
+	public CertificateConfirmationContent Build()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
+		for (int i = 0; i != acceptedCerts.Count; i++)
+		{
+			X509Certificate x509Certificate = (X509Certificate)acceptedCerts[i];
+			BigInteger certReqId = (BigInteger)acceptedReqIds[i];
+			AlgorithmIdentifier sigAlgId = sigAlgFinder.Find(x509Certificate.SigAlgName);
+			AlgorithmIdentifier algorithmIdentifier = digestAlgFinder.find(sigAlgId);
+			if (algorithmIdentifier == null)
+			{
+				throw new CmpException("cannot find algorithm for digest from signature");
+			}
+			byte[] certHash = DigestUtilities.CalculateDigest(algorithmIdentifier.Algorithm, x509Certificate.GetEncoded());
+			asn1EncodableVector.Add(new CertStatus(certHash, certReqId));
+		}
+		return new CertificateConfirmationContent(CertConfirmContent.GetInstance(new DerSequence(asn1EncodableVector)), digestAlgFinder);
+	}
+}