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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/tls/DefaultTlsSrpConfigVerifier.cs

@@ -0,0 +1,66 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+using System.Collections.Generic;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Math;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Tls.Crypto;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Tls
+{
+    public class DefaultTlsSrpConfigVerifier
+        : TlsSrpConfigVerifier
+    {
+        private static readonly List<Srp6Group> DefaultGroups = new List<Srp6Group>();
+
+        static DefaultTlsSrpConfigVerifier()
+        {
+            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);
+        }
+
+        // IList is (SRP6Group)
+        protected readonly IList<Srp6Group> m_groups;
+
+        /// <summary>Accept only the group parameters specified in RFC 5054 Appendix A.</summary>
+        public DefaultTlsSrpConfigVerifier()
+            : this(DefaultGroups)
+        {
+        }
+
+        /// <summary>Specify a custom set of acceptable group parameters.</summary>
+        /// <param name="groups">an <see cref="IList{T}"/> of acceptable <see cref="Srp6Group"/>.</param>
+        public DefaultTlsSrpConfigVerifier(IList<Srp6Group> groups)
+        {
+            this.m_groups = new List<Srp6Group>(groups);
+        }
+
+        public virtual bool Accept(TlsSrpConfig srpConfig)
+        {
+            foreach (Srp6Group group in m_groups)
+            {
+                if (AreGroupsEqual(srpConfig, group))
+                    return true;
+            }
+            return false;
+        }
+
+        protected virtual bool AreGroupsEqual(TlsSrpConfig a, Srp6Group b)
+        {
+            BigInteger[] ng = a.GetExplicitNG();
+            return AreParametersEqual(ng[0], b.N) && AreParametersEqual(ng[1], b.G);
+        }
+
+        protected virtual bool AreParametersEqual(BigInteger a, BigInteger b)
+        {
+            return a == b || a.Equals(b);
+        }
+    }
+}
+#pragma warning restore
+#endif