You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

70 lines
2.1 KiB

using System;
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 = Platform.CreateArrayList();
static DefaultTlsSrpGroupVerifier()
{
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);
}
// Vector is (SRP6GroupParameters)
protected readonly IList mGroups;
/**
* Accept only the group parameters specified in RFC 5054 Appendix A.
*/
public DefaultTlsSrpGroupVerifier()
: this(DefaultGroups)
{
}
/**
* Specify a custom set of acceptable group parameters.
*
* @param groups a {@link Vector} of acceptable {@link SRP6GroupParameters}
*/
public DefaultTlsSrpGroupVerifier(IList groups)
{
this.mGroups = groups;
}
public virtual bool Accept(Srp6GroupParameters group)
{
foreach (Srp6GroupParameters entry in mGroups)
{
if (AreGroupsEqual(group, entry))
{
return true;
}
}
return false;
}
protected virtual bool AreGroupsEqual(Srp6GroupParameters a, Srp6GroupParameters b)
{
return a == b || (AreParametersEqual(a.N, b.N) && AreParametersEqual(a.G, b.G));
}
protected virtual bool AreParametersEqual(BigInteger a, BigInteger b)
{
return a == b || a.Equals(b);
}
}
}