/**
* Create a key generator for the passed in Object Identifier.
*
* @param algorithm the Object Identifier indicating the algorithn the generator is for.
* @param random a source of random to initialise the generator with.
* @return an initialised CipherKeyGenerator.
* @throws IllegalArgumentException if the algorithm cannot be identified.
*/
public static CipherKeyGenerator CreateKeyGenerator(DerObjectIdentifier algorithm, SecureRandom random)
{
if (NistObjectIdentifiers.IdAes128Cbc.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 128));
}
else if (NistObjectIdentifiers.IdAes192Cbc.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 192));
}
else if (NistObjectIdentifiers.IdAes256Cbc.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 256));
}
else if (PkcsObjectIdentifiers.DesEde3Cbc.Equals(algorithm))
{
DesEdeKeyGenerator keyGen = new DesEdeKeyGenerator();
keyGen.Init(new KeyGenerationParameters(random, 192));
return(keyGen);
}
else if (NttObjectIdentifiers.IdCamellia128Cbc.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 128));
}
else if (NttObjectIdentifiers.IdCamellia192Cbc.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 192));
}
else if (NttObjectIdentifiers.IdCamellia256Cbc.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 256));
}
else if (KisaObjectIdentifiers.IdSeedCbc.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 128));
}
else if (AlgorithmIdentifierFactory.CAST5_CBC.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 128));
}
else if (OiwObjectIdentifiers.DesCbc.Equals(algorithm))
{
DesKeyGenerator keyGen = new DesKeyGenerator();
keyGen.Init(new KeyGenerationParameters(random, 64));
return(keyGen);
}
else if (PkcsObjectIdentifiers.rc4.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 128));
}
else if (PkcsObjectIdentifiers.RC2Cbc.Equals(algorithm))
{
return(CreateCipherKeyGenerator(random, 128));
}
else
{
throw new InvalidOperationException("cannot recognise cipher: " + algorithm);
}
}
public override void PerformTest()
{
DesKeyGenerator keyGen = new DesKeyGenerator();
keyGen.Init(new KeyGenerationParameters(new SecureRandom(), 56));
byte[] kB = keyGen.GenerateKey();
if (kB.Length != 8)
{
Fail("DES bit key wrong length.");
}
}
