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70 lines
2.1 KiB
70 lines
2.1 KiB
using System;
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using System.Collections;
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using Org.BouncyCastle.Crypto.Agreement.Srp;
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using Org.BouncyCastle.Crypto.Parameters;
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using Org.BouncyCastle.Math;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Crypto.Tls
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{
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public class DefaultTlsSrpGroupVerifier
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: TlsSrpGroupVerifier
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{
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protected static readonly IList DefaultGroups = Platform.CreateArrayList();
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static DefaultTlsSrpGroupVerifier()
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{
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DefaultGroups.Add(Srp6StandardGroups.rfc5054_1024);
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DefaultGroups.Add(Srp6StandardGroups.rfc5054_1536);
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DefaultGroups.Add(Srp6StandardGroups.rfc5054_2048);
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DefaultGroups.Add(Srp6StandardGroups.rfc5054_3072);
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DefaultGroups.Add(Srp6StandardGroups.rfc5054_4096);
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DefaultGroups.Add(Srp6StandardGroups.rfc5054_6144);
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DefaultGroups.Add(Srp6StandardGroups.rfc5054_8192);
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}
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// Vector is (SRP6GroupParameters)
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protected readonly IList mGroups;
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/**
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* Accept only the group parameters specified in RFC 5054 Appendix A.
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*/
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public DefaultTlsSrpGroupVerifier()
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: this(DefaultGroups)
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{
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}
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/**
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* Specify a custom set of acceptable group parameters.
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*
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* @param groups a {@link Vector} of acceptable {@link SRP6GroupParameters}
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*/
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public DefaultTlsSrpGroupVerifier(IList groups)
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{
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this.mGroups = groups;
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}
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public virtual bool Accept(Srp6GroupParameters group)
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{
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foreach (Srp6GroupParameters entry in mGroups)
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{
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if (AreGroupsEqual(group, entry))
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{
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return true;
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}
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}
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return false;
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}
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protected virtual bool AreGroupsEqual(Srp6GroupParameters a, Srp6GroupParameters b)
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{
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return a == b || (AreParametersEqual(a.N, b.N) && AreParametersEqual(a.G, b.G));
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}
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protected virtual bool AreParametersEqual(BigInteger a, BigInteger b)
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{
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return a == b || a.Equals(b);
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}
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}
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}
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