139 lines
3.6 KiB
C#
139 lines
3.6 KiB
C#
using System;
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using System.Collections;
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using Org.BouncyCastle.Asn1;
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using Org.BouncyCastle.Asn1.Kisa;
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using Org.BouncyCastle.Asn1.Nist;
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using Org.BouncyCastle.Asn1.Ntt;
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using Org.BouncyCastle.Asn1.Pkcs;
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using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.Crypto.Engines;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Security;
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public sealed class WrapperUtilities
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{
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private enum WrapAlgorithm
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{
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AESWRAP,
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CAMELLIAWRAP,
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DESEDEWRAP,
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RC2WRAP,
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SEEDWRAP,
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DESEDERFC3211WRAP,
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AESRFC3211WRAP,
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CAMELLIARFC3211WRAP
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}
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private class BufferedCipherWrapper : IWrapper
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{
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private readonly IBufferedCipher cipher;
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private bool forWrapping;
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public string AlgorithmName => cipher.AlgorithmName;
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public BufferedCipherWrapper(IBufferedCipher cipher)
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{
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this.cipher = cipher;
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}
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public void Init(bool forWrapping, ICipherParameters parameters)
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{
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this.forWrapping = forWrapping;
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cipher.Init(forWrapping, parameters);
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}
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public byte[] Wrap(byte[] input, int inOff, int length)
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{
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if (!forWrapping)
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{
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throw new InvalidOperationException("Not initialised for wrapping");
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}
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return cipher.DoFinal(input, inOff, length);
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}
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public byte[] Unwrap(byte[] input, int inOff, int length)
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{
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if (forWrapping)
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{
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throw new InvalidOperationException("Not initialised for unwrapping");
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}
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return cipher.DoFinal(input, inOff, length);
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}
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}
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private static readonly IDictionary algorithms;
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private WrapperUtilities()
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{
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}
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static WrapperUtilities()
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{
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algorithms = Platform.CreateHashtable();
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((WrapAlgorithm)Enums.GetArbitraryValue(typeof(WrapAlgorithm))).ToString();
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algorithms[NistObjectIdentifiers.IdAes128Wrap.Id] = "AESWRAP";
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algorithms[NistObjectIdentifiers.IdAes192Wrap.Id] = "AESWRAP";
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algorithms[NistObjectIdentifiers.IdAes256Wrap.Id] = "AESWRAP";
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algorithms[NttObjectIdentifiers.IdCamellia128Wrap.Id] = "CAMELLIAWRAP";
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algorithms[NttObjectIdentifiers.IdCamellia192Wrap.Id] = "CAMELLIAWRAP";
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algorithms[NttObjectIdentifiers.IdCamellia256Wrap.Id] = "CAMELLIAWRAP";
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algorithms[PkcsObjectIdentifiers.IdAlgCms3DesWrap.Id] = "DESEDEWRAP";
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algorithms["TDEAWRAP"] = "DESEDEWRAP";
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algorithms[PkcsObjectIdentifiers.IdAlgCmsRC2Wrap.Id] = "RC2WRAP";
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algorithms[KisaObjectIdentifiers.IdNpkiAppCmsSeedWrap.Id] = "SEEDWRAP";
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}
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public static IWrapper GetWrapper(DerObjectIdentifier oid)
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{
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return GetWrapper(oid.Id);
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}
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public static IWrapper GetWrapper(string algorithm)
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{
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string text = Platform.ToUpperInvariant(algorithm);
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string text2 = (string)algorithms[text];
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if (text2 == null)
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{
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text2 = text;
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}
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try
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{
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switch ((WrapAlgorithm)Enums.GetEnumValue(typeof(WrapAlgorithm), text2))
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{
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case WrapAlgorithm.AESWRAP:
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return new AesWrapEngine();
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case WrapAlgorithm.CAMELLIAWRAP:
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return new CamelliaWrapEngine();
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case WrapAlgorithm.DESEDEWRAP:
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return new DesEdeWrapEngine();
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case WrapAlgorithm.RC2WRAP:
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return new RC2WrapEngine();
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case WrapAlgorithm.SEEDWRAP:
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return new SeedWrapEngine();
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case WrapAlgorithm.DESEDERFC3211WRAP:
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return new Rfc3211WrapEngine(new DesEdeEngine());
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case WrapAlgorithm.AESRFC3211WRAP:
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return new Rfc3211WrapEngine(new AesEngine());
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case WrapAlgorithm.CAMELLIARFC3211WRAP:
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return new Rfc3211WrapEngine(new CamelliaEngine());
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}
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}
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catch (ArgumentException)
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{
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}
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IBufferedCipher cipher = CipherUtilities.GetCipher(algorithm);
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if (cipher != null)
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{
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return new BufferedCipherWrapper(cipher);
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}
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throw new SecurityUtilityException("Wrapper " + algorithm + " not recognised.");
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}
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public static string GetAlgorithmName(DerObjectIdentifier oid)
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{
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return (string)algorithms[oid.Id];
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}
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}
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