init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Cms/CounterSignatureDigestCalculator.cs

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+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Security;
+
+namespace Org.BouncyCastle.Cms;
+
+internal class CounterSignatureDigestCalculator : IDigestCalculator
+{
+	private readonly string alg;
+
+	private readonly byte[] data;
+
+	internal CounterSignatureDigestCalculator(string alg, byte[] data)
+	{
+		this.alg = alg;
+		this.data = data;
+	}
+
+	public byte[] GetDigest()
+	{
+		IDigest digestInstance = CmsSignedHelper.Instance.GetDigestInstance(alg);
+		return DigestUtilities.DoFinal(digestInstance, data);
+	}
+}