private const int Iterations = 10000000; // 10,000,000 (10 million)
private static StreamCsPrng GetEngine(CsPseudorandomNumberGenerator cipher)
{
var config = CsPrngFactory.CreateStreamCipherCsprngConfiguration(cipher);
var engine = CipherFactory.CreateStreamCipher(config.CipherName.ToEnum <StreamCipher>());
return(new StreamCsPrng(engine, config.Key, config.Nonce));
}
public static PayloadConfiguration CreateSimple(CsPseudorandomNumberGenerator csprngEnum)
{
var config = new PayloadConfiguration {
SchemeName = PayloadLayoutScheme.Simple.ToString(),
EntropyScheme = PayloadMuxEntropyScheme.StreamCipherCsprng,
EntropySchemeData = CsPrngFactory.CreateStreamCipherCsprngConfiguration(csprngEnum).SerialiseDto()
};
return(config);
}
public static StreamCipherCsprngConfiguration CreateRandomConfiguration(CsPseudorandomNumberGenerator csprng)
{
var cipherEnum = csprng.ToString().ToEnum <StreamCipher>();
var config = new StreamCipherCsprngConfiguration {
CipherName = csprng.ToString(),
Key = new byte[Athena.Cryptography.StreamCiphers[cipherEnum].DefaultKeySizeBits / 8],
Nonce = new byte[Athena.Cryptography.StreamCiphers[cipherEnum].DefaultNonceSizeBits / 8]
};
StratCom.EntropySupplier.NextBytes(config.Key);
StratCom.EntropySupplier.NextBytes(config.Nonce);
return(config);
}
public static PayloadConfiguration CreateFabricVariable(CsPseudorandomNumberGenerator csprngEnum, int?minStripe = null,
int?maxStripe = null)
{
CheckFabricArgumentsValid(minStripe, maxStripe);
var config = new PayloadConfiguration {
SchemeName = PayloadLayoutScheme.Fabric.ToString(),
SchemeConfiguration = new RangeConfiguration {
Minimum = (minStripe == null ? FabricPayloadMux.MinimumStripeLength : minStripe.Value),
Maximum = (maxStripe == null ? FabricPayloadMux.MaximumStripeLength : maxStripe.Value)
}.SerialiseDto(),
EntropyScheme = PayloadMuxEntropyScheme.StreamCipherCsprng,
EntropySchemeData = CsPrngFactory.CreateStreamCipherCsprngConfiguration(csprngEnum).SerialiseDto()
};
return(config);
}
public static PayloadConfiguration CreateFrameshiftFixed(CsPseudorandomNumberGenerator csprngEnum, int?paddingSize = null)
{
int fixedSize = paddingSize == null ? FrameshiftPayloadMux.DefaultFixedPaddingLength : paddingSize.Value;
if (fixedSize.IsBetween(FrameshiftPayloadMux.MinimumPaddingLength, FrameshiftPayloadMux.MaximumPaddingLength) == false)
{
throw new ArgumentOutOfRangeException("paddingSize", "Padding size not within specification.");
}
var config = new PayloadConfiguration {
SchemeName = PayloadLayoutScheme.Frameshift.ToString(),
SchemeConfiguration = new RangeConfiguration {
Minimum = fixedSize,
Maximum = fixedSize,
}.SerialiseDto(),
EntropyScheme = PayloadMuxEntropyScheme.StreamCipherCsprng,
EntropySchemeData = CsPrngFactory.CreateStreamCipherCsprngConfiguration(csprngEnum).SerialiseDto()
};
return(config);
}
/// <summary>
/// Initialises the configuration for the specified module type with default settings.
/// If fine-tuning is desired, use the specialised constructors.
/// </summary>
/// <param name="schemeEnum">Desired payload layout scheme.</param>
/// <seealso cref="CreateSimple" />
/// <seealso cref="CreateFrameshiftVariable" />
public static PayloadConfiguration CreateDefault(PayloadLayoutScheme schemeEnum)
{
const CsPseudorandomNumberGenerator defaultCsprng = CsPseudorandomNumberGenerator.Rabbit; // Fast initialisation!
switch (schemeEnum)
{
case PayloadLayoutScheme.Simple:
return(CreateSimple(defaultCsprng));
case PayloadLayoutScheme.Frameshift:
// Padding length is variable by default.
return(CreateFrameshiftVariable(defaultCsprng, FrameshiftPayloadMux.MinimumPaddingLength,
FrameshiftPayloadMux.MaximumPaddingLength));
#if INCLUDE_FABRIC
case PayloadLayoutScheme.Fabric:
// Stripe length is variable by default.
return(CreateFabricVariable(defaultCsprng, FabricPayloadMux.MinimumStripeLength, FabricPayloadMux.MaximumStripeLength));
#endif
}
throw new NotSupportedException();
}
public static StreamCipherCsprngConfiguration CreateStreamCipherCsprngConfiguration
(CsPseudorandomNumberGenerator cipherEnum)
{
return(StreamCsPrng.CreateRandomConfiguration(cipherEnum));
}
