113 lines
5.1 KiB
C#
113 lines
5.1 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using System.Collections.Generic;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.Sec;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.X9;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Collections;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.Nist
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{
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/// <summary>Elliptic curve registry for NIST curves.</summary>
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public static class NistNamedCurves
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{
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private static readonly Dictionary<string, DerObjectIdentifier> objIds =
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new Dictionary<string, DerObjectIdentifier>(StringComparer.OrdinalIgnoreCase);
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private static readonly Dictionary<DerObjectIdentifier, string> names =
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new Dictionary<DerObjectIdentifier, string>();
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private static void DefineCurveAlias(string name, DerObjectIdentifier oid)
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{
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if (SecNamedCurves.GetByOidLazy(oid) == null)
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throw new InvalidOperationException();
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objIds.Add(name, oid);
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names.Add(oid, name);
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}
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static NistNamedCurves()
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{
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DefineCurveAlias("B-163", SecObjectIdentifiers.SecT163r2);
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DefineCurveAlias("B-233", SecObjectIdentifiers.SecT233r1);
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DefineCurveAlias("B-283", SecObjectIdentifiers.SecT283r1);
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DefineCurveAlias("B-409", SecObjectIdentifiers.SecT409r1);
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DefineCurveAlias("B-571", SecObjectIdentifiers.SecT571r1);
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DefineCurveAlias("K-163", SecObjectIdentifiers.SecT163k1);
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DefineCurveAlias("K-233", SecObjectIdentifiers.SecT233k1);
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DefineCurveAlias("K-283", SecObjectIdentifiers.SecT283k1);
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DefineCurveAlias("K-409", SecObjectIdentifiers.SecT409k1);
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DefineCurveAlias("K-571", SecObjectIdentifiers.SecT571k1);
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DefineCurveAlias("P-192", SecObjectIdentifiers.SecP192r1);
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DefineCurveAlias("P-224", SecObjectIdentifiers.SecP224r1);
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DefineCurveAlias("P-256", SecObjectIdentifiers.SecP256r1);
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DefineCurveAlias("P-384", SecObjectIdentifiers.SecP384r1);
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DefineCurveAlias("P-521", SecObjectIdentifiers.SecP521r1);
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}
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/// <summary>Look up the <see cref="X9ECParameters"/> for the curve with the given name.</summary>
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/// <param name="name">The name of the curve.</param>
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public static X9ECParameters GetByName(string name)
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{
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DerObjectIdentifier oid = GetOid(name);
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return oid == null ? null : GetByOid(oid);
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}
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/// <summary>Look up an <see cref="X9ECParametersHolder"/> for the curve with the given name.</summary>
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/// <remarks>
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/// Allows accessing the <see cref="Math.EC.ECCurve">curve</see> without necessarily triggering the creation of
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/// the full <see cref="X9ECParameters"/>.
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/// </remarks>
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/// <param name="name">The name of the curve.</param>
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public static X9ECParametersHolder GetByNameLazy(string name)
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{
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DerObjectIdentifier oid = GetOid(name);
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return oid == null ? null : GetByOidLazy(oid);
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}
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/// <summary>Look up the <see cref="X9ECParameters"/> for the curve with the given
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/// <see cref="DerObjectIdentifier">OID</see>.</summary>
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/// <param name="oid">The <see cref="DerObjectIdentifier">OID</see> for the curve.</param>
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public static X9ECParameters GetByOid(DerObjectIdentifier oid)
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{
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return GetByOidLazy(oid)?.Parameters;
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}
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/// <summary>Look up an <see cref="X9ECParametersHolder"/> for the curve with the given
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/// <see cref="DerObjectIdentifier">OID</see>.</summary>
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/// <remarks>
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/// Allows accessing the <see cref="Math.EC.ECCurve">curve</see> without necessarily triggering the creation of
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/// the full <see cref="X9ECParameters"/>.
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/// </remarks>
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/// <param name="oid">The <see cref="DerObjectIdentifier">OID</see> for the curve.</param>
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public static X9ECParametersHolder GetByOidLazy(DerObjectIdentifier oid)
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{
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return names.ContainsKey(oid) ? SecNamedCurves.GetByOidLazy(oid) : null;
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}
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/// <summary>Look up the name of the curve with the given <see cref="DerObjectIdentifier">OID</see>.</summary>
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/// <param name="oid">The <see cref="DerObjectIdentifier">OID</see> for the curve.</param>
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public static string GetName(DerObjectIdentifier oid)
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{
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return CollectionUtilities.GetValueOrNull(names, oid);
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}
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/// <summary>Look up the <see cref="DerObjectIdentifier">OID</see> of the curve with the given name.</summary>
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/// <param name="name">The name of the curve.</param>
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public static DerObjectIdentifier GetOid(string name)
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{
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return CollectionUtilities.GetValueOrNull(objIds, name);
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}
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/// <summary>Enumerate the available curve names in this registry.</summary>
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public static IEnumerable<string> Names
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{
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get { return CollectionUtilities.Proxy(objIds.Keys); }
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}
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}
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}
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#pragma warning restore
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#endif
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