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using System;
using System.Collections.Generic;
using Org.BouncyCastle.Asn1.Anssi;
using Org.BouncyCastle.Asn1.CryptoPro;
using Org.BouncyCastle.Asn1.GM;
using Org.BouncyCastle.Asn1.Nist;
using Org.BouncyCastle.Asn1.Sec;
using Org.BouncyCastle.Asn1.TeleTrust;
namespace Org.BouncyCastle.Asn1.X9
{
/// <summary>A unified elliptic curve registry of the various standard-specific registries.</summary>
public class ECNamedCurveTable
{
/// <summary>Look up the <see cref="X9ECParameters"/> for the curve with the given name.</summary>
/// <param name="name">The name of the curve.</param>
public static X9ECParameters GetByName(string name)
{
X9ECParameters ecP = X962NamedCurves.GetByName(name);
if (ecP == null)
{
ecP = SecNamedCurves.GetByName(name);
}
if (ecP == null)
{
ecP = NistNamedCurves.GetByName(name);
}
if (ecP == null)
{
ecP = TeleTrusTNamedCurves.GetByName(name);
}
if (ecP == null)
{
ecP = AnssiNamedCurves.GetByName(name);
}
if (ecP == null)
{
ecP = ECGost3410NamedCurves.GetByName(name);
}
if (ecP == null)
{
ecP = GMNamedCurves.GetByName(name);
}
return ecP;
}
/// <summary>Look up an <see cref="X9ECParametersHolder"/> for the curve with the given name.</summary>
/// <remarks>
/// Allows accessing the <see cref="Math.EC.ECCurve">curve</see> without necessarily triggering the creation of
/// the full <see cref="X9ECParameters"/>.
/// </remarks>
/// <param name="name">The name of the curve.</param>
public static X9ECParametersHolder GetByNameLazy(string name)
{
X9ECParametersHolder holder = X962NamedCurves.GetByNameLazy(name);
if (null == holder)
{
holder = SecNamedCurves.GetByNameLazy(name);
}
if (null == holder)
{
holder = NistNamedCurves.GetByNameLazy(name);
}
if (null == holder)
{
holder = TeleTrusTNamedCurves.GetByNameLazy(name);
}
if (null == holder)
{
holder = AnssiNamedCurves.GetByNameLazy(name);
}
if (null == holder)
{
holder = ECGost3410NamedCurves.GetByNameLazy(name);
}
if (null == holder)
{
holder = GMNamedCurves.GetByNameLazy(name);
}
return holder;
}
/// <summary>Look up the <see cref="X9ECParameters"/> for the curve with the given
/// <see cref="DerObjectIdentifier">OID</see>.</summary>
/// <param name="oid">The <see cref="DerObjectIdentifier">OID</see> for the curve.</param>
public static X9ECParameters GetByOid(DerObjectIdentifier oid)
{
X9ECParameters ecP = X962NamedCurves.GetByOid(oid);
if (ecP == null)
{
ecP = SecNamedCurves.GetByOid(oid);
}
// NOTE: All the NIST curves are currently from SEC, so no point in redundant OID lookup
if (ecP == null)
{
ecP = TeleTrusTNamedCurves.GetByOid(oid);
}
if (ecP == null)
{
ecP = AnssiNamedCurves.GetByOid(oid);
}
if (ecP == null)
{
ecP = ECGost3410NamedCurves.GetByOid(oid);
}
if (ecP == null)
{
ecP = GMNamedCurves.GetByOid(oid);
}
return ecP;
}
/// <summary>Look up an <see cref="X9ECParametersHolder"/> for the curve with the given
/// <see cref="DerObjectIdentifier">OID</see>.</summary>
/// <remarks>
/// Allows accessing the <see cref="Math.EC.ECCurve">curve</see> without necessarily triggering the creation of
/// the full <see cref="X9ECParameters"/>.
/// </remarks>
/// <param name="oid">The <see cref="DerObjectIdentifier">OID</see> for the curve.</param>
public static X9ECParametersHolder GetByOidLazy(DerObjectIdentifier oid)
{
X9ECParametersHolder holder = X962NamedCurves.GetByOidLazy(oid);
if (null == holder)
{
holder = SecNamedCurves.GetByOidLazy(oid);
}
// NOTE: All the NIST curves are currently from SEC, so no point in redundant OID lookup
if (null == holder)
{
holder = TeleTrusTNamedCurves.GetByOidLazy(oid);
}
if (null == holder)
{
holder = AnssiNamedCurves.GetByOidLazy(oid);
}
if (null == holder)
{
holder = ECGost3410NamedCurves.GetByOidLazy(oid);
}
if (null == holder)
{
holder = GMNamedCurves.GetByOidLazy(oid);
}
return holder;
}
/// <summary>Look up the name of the curve with the given <see cref="DerObjectIdentifier">OID</see>.</summary>
/// <param name="oid">The <see cref="DerObjectIdentifier">OID</see> for the curve.</param>
public static string GetName(DerObjectIdentifier oid)
{
string name = X962NamedCurves.GetName(oid);
if (name == null)
{
name = SecNamedCurves.GetName(oid);
}
if (name == null)
{
name = NistNamedCurves.GetName(oid);
}
if (name == null)
{
name = TeleTrusTNamedCurves.GetName(oid);
}
if (name == null)
{
name = AnssiNamedCurves.GetName(oid);
}
if (name == null)
{
name = ECGost3410NamedCurves.GetName(oid);
}
if (name == null)
{
name = GMNamedCurves.GetName(oid);
}
return name;
}
/// <summary>Look up the <see cref="DerObjectIdentifier">OID</see> of the curve with the given name.</summary>
/// <param name="name">The name of the curve.</param>
public static DerObjectIdentifier GetOid(string name)
{
DerObjectIdentifier oid = X962NamedCurves.GetOid(name);
if (oid == null)
{
oid = SecNamedCurves.GetOid(name);
}
if (oid == null)
{
oid = NistNamedCurves.GetOid(name);
}
if (oid == null)
{
oid = TeleTrusTNamedCurves.GetOid(name);
}
if (oid == null)
{
oid = AnssiNamedCurves.GetOid(name);
}
if (oid == null)
{
oid = ECGost3410NamedCurves.GetOid(name);
}
if (oid == null)
{
oid = GMNamedCurves.GetOid(name);
}
return oid;
}
/// <summary>Enumerate the available curve names in all the registries.</summary>
public static IEnumerable<string> Names
{
get
{
var result = new List<string>();
result.AddRange(X962NamedCurves.Names);
result.AddRange(SecNamedCurves.Names);
result.AddRange(NistNamedCurves.Names);
result.AddRange(TeleTrusTNamedCurves.Names);
result.AddRange(AnssiNamedCurves.Names);
result.AddRange(ECGost3410NamedCurves.Names);
result.AddRange(GMNamedCurves.Names);
return result;
}
}
}
}
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