GOST3410NamedParameters.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » CryptoPro » C# / CSharp Open Source

using System;
using System.Collections;

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Utilities.Collections;

namespace Org.BouncyCastle.Asn1.CryptoPro{
    /**
    * table of the available named parameters for GOST 3410-94.
    */
    public sealed class Gost3410NamedParameters
    {
    private Gost3410NamedParameters()
    {
    }

        private static readonly Hashtable objIds = new Hashtable();
        private static readonly Hashtable parameters = new Hashtable();

        private static readonly Gost3410ParamSetParameters cryptoProA = new Gost3410ParamSetParameters(
            1024,
            new BigInteger("127021248288932417465907042777176443525787653508916535812817507265705031260985098497423188333483401180925999995120988934130659205614996724254121049274349357074920312769561451689224110579311248812610229678534638401693520013288995000362260684222750813532307004517341633685004541062586971416883686778842537820383"),
            new BigInteger("68363196144955700784444165611827252895102170888761442055095051287550314083023"),
            new BigInteger("100997906755055304772081815535925224869841082572053457874823515875577147990529272777244152852699298796483356699682842027972896052747173175480590485607134746852141928680912561502802222185647539190902656116367847270145019066794290930185446216399730872221732889830323194097355403213400972588322876850946740663962")
            //            validationAlgorithm {
            //                    algorithm
            //                        id-GostR3410-94-bBis,
            //                    parameters
            //                        GostR3410-94-ValidationBisParameters: {
            //                            x0      1376285941,
            //                            c       3996757427
            //                        }
            //                }

            );

        private static readonly Gost3410ParamSetParameters cryptoProB = new Gost3410ParamSetParameters(
            1024,
            new BigInteger("139454871199115825601409655107690713107041707059928031797758001454375765357722984094124368522288239833039114681648076688236921220737322672160740747771700911134550432053804647694904686120113087816240740184800477047157336662926249423571248823968542221753660143391485680840520336859458494803187341288580489525163"),
            new BigInteger("79885141663410976897627118935756323747307951916507639758300472692338873533959"),
            new BigInteger("42941826148615804143873447737955502392672345968607143066798112994089471231420027060385216699563848719957657284814898909770759462613437669456364882730370838934791080835932647976778601915343474400961034231316672578686920482194932878633360203384797092684342247621055760235016132614780652761028509445403338652341")
            //    validationAlgorithm {
            //            algorithm
            //                id-GostR3410-94-bBis,
            //            parameters
            //                GostR3410-94-ValidationBisParameters: {
            //                    x0      1536654555,
            //                    c       1855361757,
            //                    d       14408629386140014567655
            //4902939282056547857802241461782996702017713059974755104394739915140
            //6115284791024439062735788342744854120601660303926203867703556828005
            //8957203818114895398976594425537561271800850306
            //                }
            //        }
            //}
            );

        private static readonly Gost3410ParamSetParameters cryptoProXchA = new Gost3410ParamSetParameters(
            1024,
            new BigInteger("142011741597563481196368286022318089743276138395243738762872573441927459393512718973631166078467600360848946623567625795282774719212241929071046134208380636394084512691828894000571524625445295769349356752728956831541775441763139384457191755096847107846595662547942312293338483924514339614727760681880609734239"),
            new BigInteger("91771529896554605945588149018382750217296858393520724172743325725474374979801"),
            new BigInteger("133531813272720673433859519948319001217942375967847486899482359599369642528734712461590403327731821410328012529253871914788598993103310567744136196364803064721377826656898686468463277710150809401182608770201615324990468332931294920912776241137878030224355746606283971659376426832674269780880061631528163475887")
            );

    static Gost3410NamedParameters()
        {
            parameters[CryptoProObjectIdentifiers.GostR3410x94CryptoProA] = cryptoProA;
            parameters[CryptoProObjectIdentifiers.GostR3410x94CryptoProB] = cryptoProB;
            //parameters[CryptoProObjectIdentifiers.GostR3410x94CryptoProC] = cryptoProC;
            //parameters[CryptoProObjectIdentifiers.GostR3410x94CryptoProD] = cryptoProD;
            parameters[CryptoProObjectIdentifiers.GostR3410x94CryptoProXchA] = cryptoProXchA;
            //parameters[CryptoProObjectIdentifiers.GostR3410x94CryptoProXchB] = cryptoProXchA;
            //parameters[CryptoProObjectIdentifiers.GostR3410x94CryptoProXchC] = cryptoProXchA;

      objIds["GostR3410-94-CryptoPro-A"] = CryptoProObjectIdentifiers.GostR3410x94CryptoProA;
            objIds["GostR3410-94-CryptoPro-B"] = CryptoProObjectIdentifiers.GostR3410x94CryptoProB;
            objIds["GostR3410-94-CryptoPro-XchA"] = CryptoProObjectIdentifiers.GostR3410x94CryptoProXchA;
        }

    /**
        * return the GOST3410ParamSetParameters object for the given OID, null if it
        * isn't present.
        *
        * @param oid an object identifier representing a named parameters, if present.
        */
        public static Gost3410ParamSetParameters GetByOid(
            DerObjectIdentifier oid)
        {
            return (Gost3410ParamSetParameters) parameters[oid];
        }

    /**
        * returns an enumeration containing the name strings for parameters
        * contained in this structure.
        */
        public static IEnumerable Names
        {
      get { return new EnumerableProxy(objIds.Keys); }
        }

    public static Gost3410ParamSetParameters GetByName(
            string name)
        {
            DerObjectIdentifier oid = (DerObjectIdentifier) objIds[name];

            if (oid != null)
            {
                return (Gost3410ParamSetParameters) parameters[oid];
            }

            return null;
        }

        public static DerObjectIdentifier GetOid(
      string name)
        {
            return (DerObjectIdentifier) objIds[name];
        }
    }
}