init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Tls/DefaultTlsSrpGroupVerifier.cs

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+using System.Collections;
+using Org.BouncyCastle.Crypto.Agreement.Srp;
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Tls;
+
+public class DefaultTlsSrpGroupVerifier : TlsSrpGroupVerifier
+{
+	protected static readonly IList DefaultGroups;
+
+	protected readonly IList mGroups;
+
+	static DefaultTlsSrpGroupVerifier()
+	{
+		DefaultGroups = Platform.CreateArrayList();
+		DefaultGroups.Add(Srp6StandardGroups.rfc5054_1024);
+		DefaultGroups.Add(Srp6StandardGroups.rfc5054_1536);
+		DefaultGroups.Add(Srp6StandardGroups.rfc5054_2048);
+		DefaultGroups.Add(Srp6StandardGroups.rfc5054_3072);
+		DefaultGroups.Add(Srp6StandardGroups.rfc5054_4096);
+		DefaultGroups.Add(Srp6StandardGroups.rfc5054_6144);
+		DefaultGroups.Add(Srp6StandardGroups.rfc5054_8192);
+	}
+
+	public DefaultTlsSrpGroupVerifier()
+		: this(DefaultGroups)
+	{
+	}
+
+	public DefaultTlsSrpGroupVerifier(IList groups)
+	{
+		mGroups = groups;
+	}
+
+	public virtual bool Accept(Srp6GroupParameters group)
+	{
+		foreach (Srp6GroupParameters mGroup in mGroups)
+		{
+			if (AreGroupsEqual(group, mGroup))
+			{
+				return true;
+			}
+		}
+		return false;
+	}
+
+	protected virtual bool AreGroupsEqual(Srp6GroupParameters a, Srp6GroupParameters b)
+	{
+		if (a != b)
+		{
+			if (AreParametersEqual(a.N, b.N))
+			{
+				return AreParametersEqual(a.G, b.G);
+			}
+			return false;
+		}
+		return true;
+	}
+
+	protected virtual bool AreParametersEqual(BigInteger a, BigInteger b)
+	{
+		if (a != b)
+		{
+			return a.Equals(b);
+		}
+		return true;
+	}
+}