init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Parameters/HkdfParameters.cs

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+using System;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Parameters;
+
+public class HkdfParameters : IDerivationParameters
+{
+	private readonly byte[] ikm;
+
+	private readonly bool skipExpand;
+
+	private readonly byte[] salt;
+
+	private readonly byte[] info;
+
+	public virtual bool SkipExtract => skipExpand;
+
+	private HkdfParameters(byte[] ikm, bool skip, byte[] salt, byte[] info)
+	{
+		if (ikm == null)
+		{
+			throw new ArgumentNullException("ikm");
+		}
+		this.ikm = Arrays.Clone(ikm);
+		skipExpand = skip;
+		if (salt == null || salt.Length == 0)
+		{
+			this.salt = null;
+		}
+		else
+		{
+			this.salt = Arrays.Clone(salt);
+		}
+		if (info == null)
+		{
+			this.info = new byte[0];
+		}
+		else
+		{
+			this.info = Arrays.Clone(info);
+		}
+	}
+
+	public HkdfParameters(byte[] ikm, byte[] salt, byte[] info)
+		: this(ikm, skip: false, salt, info)
+	{
+	}
+
+	public static HkdfParameters SkipExtractParameters(byte[] ikm, byte[] info)
+	{
+		return new HkdfParameters(ikm, skip: true, null, info);
+	}
+
+	public static HkdfParameters DefaultParameters(byte[] ikm)
+	{
+		return new HkdfParameters(ikm, skip: false, null, null);
+	}
+
+	public virtual byte[] GetIkm()
+	{
+		return Arrays.Clone(ikm);
+	}
+
+	public virtual byte[] GetSalt()
+	{
+		return Arrays.Clone(salt);
+	}
+
+	public virtual byte[] GetInfo()
+	{
+		return Arrays.Clone(info);
+	}
+}