diff options
Diffstat (limited to 'crypto/src/security/WrapperUtilities.cs')
| -rw-r--r-- | crypto/src/security/WrapperUtilities.cs | 272 |
1 files changed, 136 insertions, 136 deletions
diff --git a/crypto/src/security/WrapperUtilities.cs b/crypto/src/security/WrapperUtilities.cs index 33567c51b..ce31ea519 100644 --- a/crypto/src/security/WrapperUtilities.cs +++ b/crypto/src/security/WrapperUtilities.cs @@ -1,6 +1,5 @@ using System; using System.Collections; -using System.Globalization; using Org.BouncyCastle.Asn1; using Org.BouncyCastle.Asn1.Kisa; @@ -13,141 +12,142 @@ using Org.BouncyCastle.Utilities; namespace Org.BouncyCastle.Security { - /// <remarks> - /// Utility class for creating IWrapper objects from their names/Oids - /// </remarks> - public sealed class WrapperUtilities - { - internal enum WrapAlgorithm { AESWRAP, CAMELLIAWRAP, DESEDEWRAP, RC2WRAP, SEEDWRAP, - DESEDERFC3211WRAP, AESRFC3211WRAP, CAMELLIARFC3211WRAP }; - - private WrapperUtilities() - { - } - - private static readonly IDictionary algorithms = Platform.CreateHashtable(); + /// <remarks> + /// Utility class for creating IWrapper objects from their names/Oids + /// </remarks> + public sealed class WrapperUtilities + { + private enum WrapAlgorithm { AESWRAP, CAMELLIAWRAP, DESEDEWRAP, RC2WRAP, SEEDWRAP, + DESEDERFC3211WRAP, AESRFC3211WRAP, CAMELLIARFC3211WRAP }; + + private WrapperUtilities() + { + } + + private static readonly IDictionary algorithms = Platform.CreateHashtable(); //private static readonly IDictionary oids = Platform.CreateHashtable(); - static WrapperUtilities() - { - // Signal to obfuscation tools not to change enum constants - ((WrapAlgorithm)Enums.GetArbitraryValue(typeof(WrapAlgorithm))).ToString(); - - algorithms[NistObjectIdentifiers.IdAes128Wrap.Id] = "AESWRAP"; - algorithms[NistObjectIdentifiers.IdAes192Wrap.Id] = "AESWRAP"; - algorithms[NistObjectIdentifiers.IdAes256Wrap.Id] = "AESWRAP"; - - algorithms[NttObjectIdentifiers.IdCamellia128Wrap.Id] = "CAMELLIAWRAP"; - algorithms[NttObjectIdentifiers.IdCamellia192Wrap.Id] = "CAMELLIAWRAP"; - algorithms[NttObjectIdentifiers.IdCamellia256Wrap.Id] = "CAMELLIAWRAP"; - - algorithms[PkcsObjectIdentifiers.IdAlgCms3DesWrap.Id] = "DESEDEWRAP"; - - algorithms[PkcsObjectIdentifiers.IdAlgCmsRC2Wrap.Id] = "RC2WRAP"; - - algorithms[KisaObjectIdentifiers.IdNpkiAppCmsSeedWrap.Id] = "SEEDWRAP"; - } - - public static IWrapper GetWrapper( - DerObjectIdentifier oid) - { - return GetWrapper(oid.Id); - } - - public static IWrapper GetWrapper( - string algorithm) - { - string upper = algorithm.ToUpperInvariant(); - string mechanism = (string) algorithms[upper]; - - if (mechanism == null) - { - mechanism = upper; - } - - try - { - WrapAlgorithm wrapAlgorithm = (WrapAlgorithm)Enums.GetEnumValue( - typeof(WrapAlgorithm), mechanism); - - switch (wrapAlgorithm) - { - case WrapAlgorithm.AESWRAP: return new AesWrapEngine(); - case WrapAlgorithm.CAMELLIAWRAP: return new CamelliaWrapEngine(); - case WrapAlgorithm.DESEDEWRAP: return new DesEdeWrapEngine(); - case WrapAlgorithm.RC2WRAP: return new RC2WrapEngine(); - case WrapAlgorithm.SEEDWRAP: return new SeedWrapEngine(); - case WrapAlgorithm.DESEDERFC3211WRAP: return new Rfc3211WrapEngine(new DesEdeEngine()); - case WrapAlgorithm.AESRFC3211WRAP: return new Rfc3211WrapEngine(new AesFastEngine()); - case WrapAlgorithm.CAMELLIARFC3211WRAP: return new Rfc3211WrapEngine(new CamelliaEngine()); - } - } - catch (ArgumentException) - { - } - - // Create an IBufferedCipher and use it as IWrapper (via BufferedCipherWrapper) - IBufferedCipher blockCipher = CipherUtilities.GetCipher(algorithm); - - if (blockCipher != null) - return new BufferedCipherWrapper(blockCipher); - - throw new SecurityUtilityException("Wrapper " + algorithm + " not recognised."); - } - - public static string GetAlgorithmName( - DerObjectIdentifier oid) - { - return (string) algorithms[oid.Id]; - } - - private class BufferedCipherWrapper - : IWrapper - { - private readonly IBufferedCipher cipher; - private bool forWrapping; - - public BufferedCipherWrapper( - IBufferedCipher cipher) - { - this.cipher = cipher; - } - - public string AlgorithmName - { - get { return cipher.AlgorithmName; } - } - - public void Init( - bool forWrapping, - ICipherParameters parameters) - { - this.forWrapping = forWrapping; - - cipher.Init(forWrapping, parameters); - } - - public byte[] Wrap( - byte[] input, - int inOff, - int length) - { - if (!forWrapping) - throw new InvalidOperationException("Not initialised for wrapping"); - - return cipher.DoFinal(input, inOff, length); - } - - public byte[] Unwrap( - byte[] input, - int inOff, - int length) - { - if (forWrapping) - throw new InvalidOperationException("Not initialised for unwrapping"); - - return cipher.DoFinal(input, inOff, length); - } - } - } + static WrapperUtilities() + { + // Signal to obfuscation tools not to change enum constants + ((WrapAlgorithm)Enums.GetArbitraryValue(typeof(WrapAlgorithm))).ToString(); + + algorithms[NistObjectIdentifiers.IdAes128Wrap.Id] = "AESWRAP"; + algorithms[NistObjectIdentifiers.IdAes192Wrap.Id] = "AESWRAP"; + algorithms[NistObjectIdentifiers.IdAes256Wrap.Id] = "AESWRAP"; + + algorithms[NttObjectIdentifiers.IdCamellia128Wrap.Id] = "CAMELLIAWRAP"; + algorithms[NttObjectIdentifiers.IdCamellia192Wrap.Id] = "CAMELLIAWRAP"; + algorithms[NttObjectIdentifiers.IdCamellia256Wrap.Id] = "CAMELLIAWRAP"; + + algorithms[PkcsObjectIdentifiers.IdAlgCms3DesWrap.Id] = "DESEDEWRAP"; + algorithms["TDEAWRAP"] = "DESEDEWRAP"; + + algorithms[PkcsObjectIdentifiers.IdAlgCmsRC2Wrap.Id] = "RC2WRAP"; + + algorithms[KisaObjectIdentifiers.IdNpkiAppCmsSeedWrap.Id] = "SEEDWRAP"; + } + + public static IWrapper GetWrapper( + DerObjectIdentifier oid) + { + return GetWrapper(oid.Id); + } + + public static IWrapper GetWrapper( + string algorithm) + { + string upper = Platform.ToUpperInvariant(algorithm); + string mechanism = (string)algorithms[upper]; + + if (mechanism == null) + { + mechanism = upper; + } + + try + { + WrapAlgorithm wrapAlgorithm = (WrapAlgorithm)Enums.GetEnumValue( + typeof(WrapAlgorithm), mechanism); + + switch (wrapAlgorithm) + { + case WrapAlgorithm.AESWRAP: return new AesWrapEngine(); + case WrapAlgorithm.CAMELLIAWRAP: return new CamelliaWrapEngine(); + case WrapAlgorithm.DESEDEWRAP: return new DesEdeWrapEngine(); + case WrapAlgorithm.RC2WRAP: return new RC2WrapEngine(); + case WrapAlgorithm.SEEDWRAP: return new SeedWrapEngine(); + case WrapAlgorithm.DESEDERFC3211WRAP: return new Rfc3211WrapEngine(new DesEdeEngine()); + case WrapAlgorithm.AESRFC3211WRAP: return new Rfc3211WrapEngine(new AesFastEngine()); + case WrapAlgorithm.CAMELLIARFC3211WRAP: return new Rfc3211WrapEngine(new CamelliaEngine()); + } + } + catch (ArgumentException) + { + } + + // Create an IBufferedCipher and use it as IWrapper (via BufferedCipherWrapper) + IBufferedCipher blockCipher = CipherUtilities.GetCipher(algorithm); + + if (blockCipher != null) + return new BufferedCipherWrapper(blockCipher); + + throw new SecurityUtilityException("Wrapper " + algorithm + " not recognised."); + } + + public static string GetAlgorithmName( + DerObjectIdentifier oid) + { + return (string) algorithms[oid.Id]; + } + + private class BufferedCipherWrapper + : IWrapper + { + private readonly IBufferedCipher cipher; + private bool forWrapping; + + public BufferedCipherWrapper( + IBufferedCipher cipher) + { + this.cipher = cipher; + } + + public string AlgorithmName + { + get { return cipher.AlgorithmName; } + } + + public void Init( + bool forWrapping, + ICipherParameters parameters) + { + this.forWrapping = forWrapping; + + cipher.Init(forWrapping, parameters); + } + + public byte[] Wrap( + byte[] input, + int inOff, + int length) + { + if (!forWrapping) + throw new InvalidOperationException("Not initialised for wrapping"); + + return cipher.DoFinal(input, inOff, length); + } + + public byte[] Unwrap( + byte[] input, + int inOff, + int length) + { + if (forWrapping) + throw new InvalidOperationException("Not initialised for unwrapping"); + + return cipher.DoFinal(input, inOff, length); + } + } + } } |