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using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Nist;
using Org.BouncyCastle.Asn1.Sec;
using Org.BouncyCastle.Asn1.X9;
using Org.BouncyCastle.Crypto.EC;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math.EC;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Org.BouncyCastle.Utilities.SSH
{
public class SSHNamedCurves
{
private static readonly Dictionary<string, DerObjectIdentifier> OidMap =
new Dictionary<string, DerObjectIdentifier>
{
{ "nistp256", SecObjectIdentifiers.SecP256r1 },
{ "nistp384", SecObjectIdentifiers.SecP384r1 },
{ "nistp521", SecObjectIdentifiers.SecP521r1 },
{ "nistk163", SecObjectIdentifiers.SecT163k1 },
{ "nistp192", SecObjectIdentifiers.SecP192r1 },
{ "nistp224", SecObjectIdentifiers.SecP224r1 },
{ "nistk233", SecObjectIdentifiers.SecT233k1 },
{ "nistb233", SecObjectIdentifiers.SecT233r1 },
{ "nistk283", SecObjectIdentifiers.SecT283k1 },
{ "nistk409", SecObjectIdentifiers.SecT409k1 },
{ "nistb409", SecObjectIdentifiers.SecT409r1 },
{ "nistt571", SecObjectIdentifiers.SecT571k1 }
};
private static readonly Dictionary<string, string> CurveNameToSSHName =
new Dictionary<string, string>
{
{"secp256r1", "nistp256"},
{"secp384r1", "nistp384"},
{"secp521r1", "nistp521"},
{"sect163k1", "nistk163"},
{"secp192r1", "nistp192"},
{"secp224r1", "nistp224"},
{"sect233k1", "nistk233"},
{"sect233r1", "nistb233"},
{"sect283k1", "nistk283"},
{"sect409k1", "nistk409"},
{"sect409r1", "nistb409"},
{"sect571k1", "nistt571"}
};
private static readonly Dictionary<ECCurve, string> CurveMap =
CustomNamedCurves.Names.ToDictionary(k => CustomNamedCurves.GetByNameLazy(k).Curve, v => v);
private static readonly Dictionary<DerObjectIdentifier, string> OidToName =
OidMap.ToDictionary(k => k.Value, v => v.Key);
public static DerObjectIdentifier GetByName(string sshName)
{
return OidMap[sshName];
}
public static X9ECParameters GetParameters(string sshName)
{
return NistNamedCurves.GetByOid(OidMap[sshName.ToLower()]);
}
public static X9ECParameters GetParameters(DerObjectIdentifier oid)
{
return NistNamedCurves.GetByOid(oid);
}
public static string GetName(DerObjectIdentifier oid)
{
return OidToName[oid];
}
public static string GetNameForParameters(ECDomainParameters parameters)
{
if (parameters is ECNamedDomainParameters)
{
return GetName(((ECNamedDomainParameters)parameters).Name);
}
return GetNameForParameters(parameters.Curve);
}
public static string GetNameForParameters(ECCurve curve)
{
return CurveNameToSSHName[CurveMap[curve]];
}
}
}
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