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107 lines
3.9 KiB
107 lines
3.9 KiB
1 year ago
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#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;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1;
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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;
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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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/**
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* Utility class for fetching curves using their NIST names as published in FIPS-PUB 186-3
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*/
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public sealed class NistNamedCurves
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{
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private NistNamedCurves()
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{
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}
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private static readonly IDictionary objIds = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateHashtable();
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private static readonly IDictionary names = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateHashtable();
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private static void DefineCurveAlias(
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string name,
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DerObjectIdentifier oid)
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{
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objIds.Add(BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.ToUpperInvariant(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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public static X9ECParameters GetByName(
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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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/**
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* return the X9ECParameters object for the named curve represented by
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* the passed in object identifier. Null if the curve isn't present.
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*
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* @param oid an object identifier representing a named curve, if present.
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*/
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public static X9ECParameters GetByOid(
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DerObjectIdentifier oid)
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{
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return SecNamedCurves.GetByOid(oid);
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}
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/**
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* return the object identifier signified by the passed in name. Null
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* if there is no object identifier associated with name.
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*
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* @return the object identifier associated with name, if present.
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*/
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public static DerObjectIdentifier GetOid(
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string name)
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{
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return (DerObjectIdentifier) objIds[BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.ToUpperInvariant(name)];
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}
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/**
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* return the named curve name represented by the given object identifier.
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*/
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public static string GetName(
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DerObjectIdentifier oid)
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{
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return (string) names[oid];
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}
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/**
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* returns an enumeration containing the name strings for curves
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* contained in this structure.
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*/
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public static IEnumerable Names
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{
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get { return new EnumerableProxy(names.Values); }
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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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