private bool isValidAlgorithm(string algorithm)
{
SymmetricBlockAlgorithm symmetricBlockAlgorithm = SymmetricBlockAlgorithmUtils.getSymmetricBlockAlgorithm(algorithm,
this.error);
int blockSize = SymmetricBlockAlgorithmUtils.getBlockSize(symmetricBlockAlgorithm, this.error);
if (this.HasError())
{
return(false);
}
if (blockSize != 64 && blockSize != 128)
{
return(false);
}
return(true);
}
/// <summary>
/// Build the engine
/// </summary>
/// <param name="algorithm">SymmetricBlockAlgorithm enum, algorithm name</param>
/// <returns>IBlockCipher with the algorithm Engine</returns>
internal IBlockCipher getCipherEngine(SymmetricBlockAlgorithm algorithm)
{
IBlockCipher engine = null;
switch (algorithm)
{
case SymmetricBlockAlgorithm.AES:
engine = new AesEngine();
break;
case SymmetricBlockAlgorithm.BLOWFISH:
engine = new BlowfishEngine();
break;
case SymmetricBlockAlgorithm.CAMELLIA:
engine = new CamelliaEngine();
break;
case SymmetricBlockAlgorithm.CAST5:
engine = new Cast5Engine();
break;
case SymmetricBlockAlgorithm.CAST6:
engine = new Cast6Engine();
break;
case SymmetricBlockAlgorithm.DES:
engine = new DesEngine();
break;
case SymmetricBlockAlgorithm.TRIPLEDES:
engine = new DesEdeEngine();
break;
case SymmetricBlockAlgorithm.DSTU7624_128:
engine = new Dstu7624Engine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.DSTU7624_128, this.error));
break;
case SymmetricBlockAlgorithm.DSTU7624_256:
engine = new Dstu7624Engine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.DSTU7624_256, this.error));
break;
case SymmetricBlockAlgorithm.DSTU7624_512:
engine = new Dstu7624Engine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.DSTU7624_512, this.error));
break;
case SymmetricBlockAlgorithm.GOST28147:
engine = new Gost28147Engine();
break;
case SymmetricBlockAlgorithm.NOEKEON:
engine = new NoekeonEngine();
break;
case SymmetricBlockAlgorithm.RC2:
engine = new RC2Engine();
break;
case SymmetricBlockAlgorithm.RC532:
engine = new RC532Engine();
break;
case SymmetricBlockAlgorithm.RC564:
engine = new RC564Engine();
break;
case SymmetricBlockAlgorithm.RC6:
engine = new RC6Engine();
break;
case SymmetricBlockAlgorithm.RIJNDAEL_128:
engine = new RijndaelEngine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.RIJNDAEL_128, this.error));
break;
case SymmetricBlockAlgorithm.RIJNDAEL_160:
engine = new RijndaelEngine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.RIJNDAEL_160, this.error));
break;
case SymmetricBlockAlgorithm.RIJNDAEL_192:
engine = new RijndaelEngine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.RIJNDAEL_192, this.error));
break;
case SymmetricBlockAlgorithm.RIJNDAEL_224:
engine = new RijndaelEngine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.RIJNDAEL_224, this.error));
break;
case SymmetricBlockAlgorithm.RIJNDAEL_256:
engine = new RijndaelEngine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.RIJNDAEL_256, this.error));
break;
case SymmetricBlockAlgorithm.SEED:
engine = new SeedEngine();
break;
case SymmetricBlockAlgorithm.SERPENT:
engine = new SerpentEngine();
break;
case SymmetricBlockAlgorithm.SKIPJACK:
engine = new SkipjackEngine();
break;
case SymmetricBlockAlgorithm.SM4:
engine = new SM4Engine();
break;
case SymmetricBlockAlgorithm.TEA:
engine = new TeaEngine();
break;
case SymmetricBlockAlgorithm.THREEFISH_256:
engine = new ThreefishEngine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.THREEFISH_256, this.error));
break;
case SymmetricBlockAlgorithm.THREEFISH_512:
engine = new ThreefishEngine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.THREEFISH_512, this.error));
break;
case SymmetricBlockAlgorithm.THREEFISH_1024:
engine = new ThreefishEngine(SymmetricBlockAlgorithmUtils.getBlockSize(SymmetricBlockAlgorithm.THREEFISH_1024, this.error));
break;
case SymmetricBlockAlgorithm.TWOFISH:
engine = new TwofishEngine();
break;
case SymmetricBlockAlgorithm.XTEA:
engine = new XteaEngine();
break;
default:
this.error.setError("SB020", "Cipher " + algorithm + " not recognised.");
break;
}
return(engine);
}