public DrbgHashAttributes(DrbgMechanism mechanism, DrbgMode mode, int maxSecurityStrength, int outputLength, int seedLength)
{
Mechanism = mechanism;
Mode = mode;
MaxSecurityStrength = maxSecurityStrength;
OutputLength = outputLength;
SeedLength = seedLength;
}
public DrbgCounterAttributes(DrbgMechanism mechanism, DrbgMode mode, int maxSecurityStrength, int blockSize, int outputLength, int keyLength)
{
Mechanism = mechanism;
Mode = mode;
MaxSecurityStrength = maxSecurityStrength;
BlockSize = blockSize;
OutputLength = outputLength;
KeyLength = keyLength;
}
public void ShouldReturnArgumentExceptionWithNonMatchingEnums(DrbgMechanism mechanism, DrbgMode mode)
{
var p = new DrbgParameters
{
Mechanism = mechanism,
Mode = mode
};
Assert.Throws(typeof(ArgumentException), () => _subject.GetDrbgInstance(p, _mockEntropy.Object));
}
public void ShouldReturnCorrectType(DrbgMechanism drbgMechanism, DrbgMode drbgMode, Type expectedType)
{
DrbgParameters p = new DrbgParameters();
p.Mechanism = drbgMechanism;
p.Mode = drbgMode;
var result = _subject.GetDrbgInstance(p, _mockEntropy.Object);
Assert.IsInstanceOf(expectedType, result);
}
public DrbgAttributes(DrbgMechanism mechanism, DrbgMode mode, int maxSecurityStrength, long minEntropyInputLength, long maxEntropyInputLength, long maxPersoStringLength, long maxAdditStringLength, long maxNumberOfBitsPerRequest, long maxNumberOfRequestsBetweenReseeds, long minNonceLength, long maxNonceLength)
{
Mechanism = mechanism;
Mode = mode;
MaxSecurityStrength = maxSecurityStrength;
MinEntropyInputLength = minEntropyInputLength;
MaxEntropyInputLength = maxEntropyInputLength;
MaxPersonalizationStringLength = maxPersoStringLength;
MaxAdditionalInputStringLength = maxAdditStringLength;
MaxNumberOfBitsPerRequest = maxNumberOfBitsPerRequest;
MaxNumberOfRequestsBetweenReseeds = maxNumberOfRequestsBetweenReseeds;
MinNonceLength = minNonceLength;
MaxNonceLength = maxNonceLength;
}
public void ShouldReturnCorrectBits(
DrbgMechanism mechanism,
DrbgMode mode,
bool predResist,
bool reseed,
int returnedBitLen,
BitString entropy,
BitString nonce,
BitString persoString,
BitString addInput1,
BitString entropyInput1,
BitString addInput2,
BitString entropyInput2,
BitString expectedBits
)
{
var entropyProvider = new TestableEntropyProvider();
var parameters = new DrbgParameters
{
PredResistanceEnabled = predResist,
EntropyInputLen = entropy.BitLength,
NonceLen = nonce.BitLength,
PersoStringLen = persoString.BitLength,
AdditionalInputLen = addInput1.BitLength,
ReturnedBitsLen = returnedBitLen,
DerFuncEnabled = false,
Mechanism = mechanism,
Mode = mode,
ReseedImplemented = reseed
};
var subject = _subject.GetDrbgInstance(parameters, entropyProvider);
entropyProvider.AddEntropy(entropy); // Entropy Input
entropyProvider.AddEntropy(nonce); // Nonce
subject.Instantiate(0, persoString); // Perso string
entropyProvider.AddEntropy(entropyInput1); // Entropy Input Reseed
entropyProvider.AddEntropy(entropyInput2); // Entropy Input Reseed
subject.Generate(parameters.ReturnedBitsLen, addInput1); // Additional Input
var result = subject.Generate(parameters.ReturnedBitsLen, addInput2); // Additional Input
Assert.AreEqual(expectedBits, result.Bits);
}
public static DrbgAttributes GetDrbgAttributes(DrbgMechanism mechanism, DrbgMode mode, bool derivationFunction = false)
{
DrbgAttributes result = null;
if (derivationFunction)
{
if (!DrbgAttributesWithDerFunc.TryFirst(w => w.Mechanism == mechanism && w.Mode == mode, out result))
{
throw new ArgumentException("Invalid mechanism and/or mode");
}
}
else
{
if (!DrbgAttributesWithoutDerFunc.TryFirst(w => w.Mechanism == mechanism && w.Mode == mode, out result))
{
throw new ArgumentException("Invalid mechanism and/or mode");
}
}
return(result);
}
